WO2022116205A1 - 一种基于吹气方法的酒精传感器及智能设备 - Google Patents

一种基于吹气方法的酒精传感器及智能设备 Download PDF

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Publication number
WO2022116205A1
WO2022116205A1 PCT/CN2020/134082 CN2020134082W WO2022116205A1 WO 2022116205 A1 WO2022116205 A1 WO 2022116205A1 CN 2020134082 W CN2020134082 W CN 2020134082W WO 2022116205 A1 WO2022116205 A1 WO 2022116205A1
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WIPO (PCT)
Prior art keywords
alcohol
accommodating cavity
detection module
solid electrolyte
electrolyte membrane
Prior art date
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Ceased
Application number
PCT/CN2020/134082
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English (en)
French (fr)
Inventor
胡建云
钟利军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Everbest Machinery Industry Co Ltd
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Shenzhen Everbest Machinery Industry Co Ltd
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Filing date
Publication date
Application filed by Shenzhen Everbest Machinery Industry Co Ltd filed Critical Shenzhen Everbest Machinery Industry Co Ltd
Priority to US18/035,735 priority Critical patent/US12553880B2/en
Priority to PCT/CN2020/134082 priority patent/WO2022116205A1/zh
Priority to EP20964050.7A priority patent/EP4206667A4/en
Publication of WO2022116205A1 publication Critical patent/WO2022116205A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/483—Physical analysis of biological material
    • G01N33/497—Physical analysis of biological material of gaseous biological material, e.g. breath
    • G01N33/4972—Determining alcohol content
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0011—Sample conditioning
    • G01N33/0016—Sample conditioning by regulating a physical variable, e.g. pressure or temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/007—Arrangements to check the analyser
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0073—Control unit therefor

Definitions

  • the present application belongs to the technical field of smart devices, and more specifically, relates to an alcohol sensor and smart device based on an air blowing method.
  • the alcohol sensor is a test tool used to detect the alcohol content of human exhaled breath, and it is also a detection tool used by the traffic police to detect whether or how much the driver drinks during law enforcement. It can effectively avoid the occurrence of traffic accidents, and can also be used in some high-risk areas or prohibited The field of drunkenness.
  • the existing alcohol sensor In order to meet the requirements of the signal, the existing alcohol sensor has a large production volume and limited application. Generally, it is only used in professional alcohol detectors. Moreover, some people may not be able to detect normally due to the fact that the air blowing volume cannot meet the requirements during the test. , the existing alcohol sensor cannot solve this problem, resulting in low detection efficiency of the alcohol detector during use.
  • the purpose of the embodiments of the present application is to provide an alcohol sensor and an intelligent device based on an air blowing method, which solves the technical problem that the alcohol sensor in the prior art cannot detect the amount of air blowing and the detection efficiency is low when applied.
  • the technical solution adopted in this application is to provide an alcohol sensor based on an air blowing method, including an alcohol detection module, an air pressure detection module, an MCU processor, a circuit substrate, and a shell covering the circuit substrate.
  • the alcohol detection module outputs its concentration signal to the MCU processor through a sampling amplifying circuit module, the air pressure detection module is connected with the MCU processor and realizes the transmission of the air pressure signal, and the MCU processor will The concentration signal and the air pressure signal are processed to output an alcohol concentration value.
  • the casing has a first accommodating cavity that communicates with the outside, the alcohol detection module is arranged in the first accommodating cavity, the bottom of the casing has a second accommodating cavity, and the casing The top has an air channel communicating with the outside and the second accommodating cavity, and the gas pressure chip is located in the second accommodating cavity.
  • the air channel includes a sunken opening at the top, a funnel-shaped channel extending downward along the sunken opening, and a column-shaped channel extending downward along the funnel-shaped channel, and the column-shaped channel is connected to the second accommodating cavity.
  • the air pressure detection module is fixed on the circuit substrate by soft glue.
  • the housing also has a third accommodating cavity, the MCU processor is located in the third accommodating cavity, and the third accommodating cavity is filled with a seal for sealing the MCU processor glue.
  • the alcohol detection module includes a first solid-state electrolyte membrane disposed in the first accommodating cavity, a first solid-state electrolyte membrane disposed on the top surface of the first solid-state electrolyte membrane and electrically connected to the MCU processor.
  • a first catalyst wire and a second catalyst wire arranged on the bottom surface of the first solid electrolyte membrane and electrically connected to the MCU processor.
  • it also includes a gas permeable membrane disposed on the top of the accommodating cavity, and external gas passes through the gas permeable membrane to react with the first solid electrolyte membrane, the first catalyst wire and the second catalyst wire.
  • a membrane pressure plate is also provided in the first accommodating cavity and at the bottom of the first solid electrolyte membrane, and the membrane pressure plate presses the first solid electrolyte membrane, the first catalyst wire and the first solid electrolyte membrane.
  • Two catalyst wires are fixed in the accommodating cavity, and the diaphragm pressing plate is fixed in the accommodating cavity by a sealant.
  • a second solid electrolyte membrane is also provided in the accommodating cavity and at the bottom of the first solid electrolyte membrane, and the second catalyst wire is located between the second solid electrolyte membrane and the first solid electrolyte membrane. between solid electrolyte membranes.
  • the sampling amplifying circuit module is a current-type sampling amplifying circuit.
  • the switch tube is a P-type MOS tube
  • the current-mode sampling amplifying circuit includes an operational amplifier, a first capacitor, a first resistor, a second resistor, a third resistor and a fourth resistor
  • the P-type MOS tube The source and the non-inverting input of the operational amplifier are simultaneously connected to one end of the alcohol detection module, the drain of the P-type MOS tube is connected to the other end of the alcohol detection module, and the inverting input of the operational amplifier
  • the other end of the alcohol detection module is connected through the first resistor, the gate of the P-type MOS tube and the positive pole of the power supply of the operational amplifier are connected to the power supply VDD at the same time, and the gate of the P-type MOS tube also passes through in sequence
  • the second resistor and the third resistor are grounded, and the connection point of the second resistor and the third resistor is connected to the non-inverting input terminal of the operational amplifier at the same time; the first capacitor and the fourth resistor are connected in parallel to the
  • the present application also provides an intelligent device, including a main body, wherein the above-mentioned alcohol sensor based on the blowing method is arranged in the main body.
  • the beneficial effect of the present application is: compared with the prior art, the present application integrates the alcohol detection module and the air pressure detection module in the housing, and because the alcohol detection module, the air pressure detection module and the outside are connected, the user can blow air according to the user's air during detection.
  • the situation determines whether there is insufficient air in real time, and reminds the user to re-blow or display the effective real-time concentration. Even when the volume of the alcohol sensor is reduced, the authenticity and accuracy of the detection can still be ensured.
  • FIG. 1 is a top view of an alcohol sensor based on an air blowing method provided by an embodiment of the present application
  • Fig. 2 is a sectional view along A-A in Fig. 1;
  • Fig. 3 is a sectional view along B-B in Fig. 1;
  • Fig. 4 is the sectional view along C-C in Fig. 1;
  • FIG. 5 is a schematic exploded view of an alcohol sensor based on a blowing method provided by an embodiment of the present application
  • FIG. 6 is a schematic diagram of the circuit structure of the alcohol sensor based on the blowing method provided by an embodiment of the present application;
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as “first” or “second” may expressly or implicitly include one or more of that feature.
  • plurality means two or more, unless otherwise expressly and specifically defined.
  • the alcohol sensor based on the air blowing method provided in this embodiment is in the shape of a cuboid as a whole. It includes a circuit substrate 10, an air pressure detection module 11 and an MCU processor 12 disposed on the circuit substrate 10, and a casing 30 covered on the circuit substrate 10, the casing 30 having a first accommodating cavity 31 communicating with the outside , the first accommodating cavity 31 is provided with an alcohol detection module, the housing 30 is provided with an air passage 33 that communicates with the outside, the air pressure detection module 11 is located at the bottom of the air passage 33, and the alcohol detection module passes through a sampling amplifier circuit module.
  • the signal is output to the MCU processor 12.
  • the air pressure detection module 11 is connected to the MCU processor 12 and realizes the transmission of the air pressure signal.
  • the MCU processor 12 processes the concentration signal and the air pressure signal and outputs the alcohol concentration value.
  • an air pressure detection module 11 is added to the sensor, and an air passage 33 is provided in the housing 30. During the detection, part of the gas blown in passes through the alcohol detection module for alcohol detection, and a part of the gas acts on the air pressure detection module 11 through the air passage. , when the air pressure value monitored by the air pressure detection module 11 is less than the set pressure value for normal air blowing, it can be determined that the user is not blowing enough air, the alcohol detection result is not read, and the user is reminded to blow air again.
  • the alcohol sensor in the present application is provided with the above-mentioned air pressure detection module 11 and MCU processor 12, which increases the function of reminding to blow air. When it is applied to various detection equipment, the detection efficiency is improved.
  • the bottom of the casing 30 has a second accommodating cavity 34 , the air pressure detection module 11 is located in the second accommodating cavity 34 , and the air passage 33 extends downward from the top of the casing 30 to the second accommodating cavity 34 .
  • the air pressure detection module 11 is placed by setting the second accommodating cavity 34, so that the air pressure detection module 11 is completely placed in the housing 30, and the air passage 33 is communicated with the second accommodating cavity 34, so that the sealing performance is better, thereby ensuring the air pressure Monitoring accuracy.
  • the air passage 33 can be divided into three parts, including a sunken opening 331 at the top, a funnel-shaped channel 332 extending downward along the sunken opening 331, and a column-shaped channel 333 extending downward along the funnel-shaped channel 332,
  • the cylindrical channel 333 communicates with the second accommodating cavity 34 .
  • the air pressure detection module 11 is fixed on the circuit substrate 10 by soft glue (not shown in the figure).
  • the soft glue is provided here, on the one hand, the air pressure detection module 11 and the circuit on the circuit substrate 10 are fixed into one body; on the other hand, when the gas acts on the air pressure detection module 11 downward, the air pressure detection module 11 will be deformed downward.
  • the soft glue at the bottom of the air pressure detection module 11 acts as a buffer, providing a deformation space for the air pressure detection module 11 .
  • the housing 30 also has a third accommodating cavity 35 , after the MCU processor 12 is placed on the circuit substrate 10 and located in the third accommodating cavity 35 , the third accommodating cavity 35 is filled with sealant 36 , plays the role of fixing the MCU processor 12 and sealing the third accommodating cavity 35 , preventing gas from entering the third accommodating cavity 35 , and ensuring that more gas enters the airway to act on the air pressure detection module 11 .
  • the alcohol detection module located in the first accommodating cavity 31 includes the first solid electrolyte membrane 20 disposed in the first accommodating cavity 31 , the top surface of the first solid electrolyte membrane 20 and the MCU
  • the first catalyst wire 60 electrically connected to the processor 12 and the second catalyst wire 50 provided on the bottom surface of the first solid electrolyte membrane 20 and electrically connected to the MCU processor 12 .
  • alcohol testing components such as the first solid electrolyte membrane 20 , the first catalyst wire 60 and the second catalyst wire 50 are arranged in the compact housing 30 , so that the internal structure of the alcohol sensor is more compact, and the circuit substrate 10 is While achieving electrical connection, it can be used as a part of the bottom case, which reduces the height of the entire sensor, can better achieve lightness and thinness, and has a higher degree of integration, and can be better applied to various smart devices.
  • a second solid electrolyte membrane 40 is also provided in the first accommodating cavity 31 and located at the bottom of the first solid electrolyte membrane 20 , and the second catalyst wire 50 is located between the second solid electrolyte membrane 40 and the second solid electrolyte membrane 40 . between the first solid electrolyte membrane sheets 20 .
  • the cross-sections of the first solid electrolyte membrane sheet 20 and the second solid electrolyte membrane sheet 40 are approximately square, and the size may be 4 mm*4 mm.
  • the size of the solid electrolyte membrane can also be adjusted according to the required size of the alcohol sensor as a whole.
  • the solid electrolyte membrane has good chemical resistance and good mechanical properties. Therefore, the thickness of the solid electrolyte membrane can be very thin, which can ensure the free movement of ions during the reaction, and has acidity, which can achieve Reacts with alcohol in the air.
  • the structures of the first catalyst wire 60 and the second catalyst wire 50 are substantially the same, and the structures may also be various.
  • the first catalyst wire 60 and the second catalyst wire 50 may be in an inverted L shape. That is, the first catalyst wire 60 includes a horizontal first reaction portion 61 and a first connecting portion 62 that is bent downward along the first reaction portion 61 .
  • the first reaction portion 61 is attached to the top surface of the first solid electrolyte membrane 20 .
  • the first connecting portion 62 protrudes along the side surface of the first solid electrolyte membrane 20 and is electrically connected to the circuit substrate 10 ;
  • Two connection parts 52 the second reaction part 51 is attached to the top surface of the second solid electrolyte membrane 40 , and the second connection part 52 extends along the side surface of the second solid electrolyte membrane 40 to be electrically connected to the circuit substrate 10 .
  • the gas enters from the top of the first accommodating cavity 31 and chemically reacts with the first solid electrolyte membrane 20 and the second solid electrolyte membrane 40 to generate sufficient charges, while the first catalyst wire 60 and the second catalyst wire 50 As a conductive electrode, it protrudes and is electrically connected to the circuit substrate 10, so as to realize signal transmission.
  • the two catalyst wires and the two solid-state electrolyte membranes are arranged to be pressed against each other.
  • the two catalysts adopt the structures shown in FIG. 6 .
  • the first catalyst wire 60 further includes a first fixing portion 63 that is bent downward along the end of the first reaction portion 61 .
  • the first fixing portion 63 is attached to the side surface of the first solid electrolyte membrane 20 and is connected to the first fixing portion 63 .
  • the second catalyst wire 50 further includes a second fixing portion 53 bent downward along the end of the second reaction portion 51, the second fixing portion 53 is attached to the side surface of the second solid electrolyte membrane 40, and Opposite to the second connecting portion 52 .
  • the first fixing portion 63 of the first catalyst wire 60 is hooked on one side of the first solid electrolyte membrane 20 , and the first connecting portion 62 extends from the opposite side of the first solid electrolyte membrane 20 .
  • the second fixing portion 53 of the second catalyst wire 50 is hooked on one side of the second solid electrolyte membrane 40 , and the second connecting portion 52 protrudes from the opposite side of the second solid electrolyte membrane 40 .
  • first catalyst filament 60 and the second catalyst filament 50 are not in direct contact
  • the first catalyst filament 60 and the second catalyst filament 50 are interdigitated in space, that is, the first reaction part 61 of the reaction part
  • the second reaction part 51 is arranged in a cross shape, so that the first connecting part 62 and the second connecting part 52 can be extended from different sides of the solid electrolyte membrane, so as to avoid short circuit due to contact with each other when extending from the same side.
  • first catalyst wire 60 and the second catalyst wire 50 may also be arranged in other manners, such as parallel or non-parallel manners. As long as it is ensured that the connecting parts of the two catalyst wires do not contact each other.
  • the casing 30 is first turned upside down, and the second catalyst wire 50 , the second solid electrolyte membrane 40 , the first catalyst wire 60 and the first solid electrolyte membrane 20 are installed in sequence, and then the diaphragm pressing plate 80 is used to press them. Press it tightly, and finally seal it with sealant.
  • the side walls of the diaphragm pressing plate 80 are respectively provided with a second catalyst wire 60 and a second catalyst wire 50.
  • a limiting groove 82 and a second limiting groove 81 the first connecting portion 62 of the first catalyst wire 60 protrudes downward along the first limiting groove 82 and is electrically connected to the circuit substrate 10
  • the second connecting portion 62 of the second catalyst wire 50 is The connecting portion 52 protrudes downward along the second limiting groove 81 and is electrically connected to the circuit substrate 10 .
  • the first accommodating cavity 31 penetrates up and down, and can be divided into three parts according to the size of the penetration, that is, the bottom cavity 311 , the top opening 312 and the connection between the bottom cavity 311 and the top opening 312 .
  • the membrane pressing plate 80 , the first solid electrolyte membrane 20 and the second solid electrolyte membrane 40 are sequentially placed in the bottom chamber 311 , and the gas permeable membrane 70 is placed in the top opening 312 and located between the bottom chamber 311 and the top opening 312 .
  • the channel 313 between the two is filled with air, so that the first solid electrolyte membrane 20, the second solid electrolyte membrane 40 and the gas permeable membrane 70 can be fully contacted with the gas, thereby forming a sufficiently large current to ensure the accuracy of the test.
  • the middle portion 611 of the second reaction portion 51 of the second catalyst wire 50 faces the channel 313 , and the top wall of the bottom chamber 311 is pressed against both ends of the second reaction portion 51 .
  • the second reaction part 51 of the second catalyst wire 50 can fully contact the air in the channel 313 and the top opening 312;
  • the portion 612 has a certain pressing effect, so that the second catalyst wire 50 and the second solid electrolyte membrane 40 can be better fixed.
  • the top opening 312 is a sunken stepped hole disposed on the top surface of the casing 30 , and a gas permeable membrane 70 is provided on the stepped surface of the subsided stepped hole, and external air can pass through the gas permeable membrane 70 and the first solid state.
  • the electrolyte membrane 20 , the first catalyst wire 60 and the second catalyst wire 50 react.
  • the breathable membrane 70 can filter the water vapor and dust in the gas, but at the same time, the gas permeability is good, which ensures that the clean gas passes through and makes the detection more accurate.
  • the breathable film 70 can also be omitted from the alcohol sensor in this embodiment.
  • the breathable film 70 is provided on the device or equipment, which can also be waterproof and dustproof. and ventilation.
  • the cross section of the sunken stepped hole is square, and the cross section of the channel 313 and the bottom chamber 311 communicating therewith are also square.
  • the use of a square top opening can maximize the air intake within a limited area, which can effectively ensure sufficient air intake, so that the signal of the miniature alcohol sensor will not be smaller than that of the traditional alcohol sensor, while the square one
  • the first accommodating cavity 31 has a large volume, which is favorable for the chemical reaction of the alcohol with the two catalyst wires and the two solid electrolyte membrane sheets.
  • a heating device (not shown in the figure) is also provided in the first accommodating cavity 31 .
  • the heating device can be a heating plate. After the test, the first accommodating cavity 31 is heated so that the gas with alcohol can be quickly volatilized, and no gas remains in the first accommodating cavity 31. The alcohol in 31 is cleared to ensure the accuracy of the next test.
  • the materials of the first catalyst wire 60 and the second catalyst wire 50 are precious metals.
  • the precious metal can be platinum wire, and of course, other precious metals can also be used to make the catalyst wire.
  • the circuit substrate 10 includes a circuit substrate 11 and components (not shown in the figure) provided on the circuit substrate.
  • the circuit substrate 11 is provided with two welding holes 13 , and the first catalyst wire 60 and the second catalyst wire 50 protrude from the first limiting groove 82 and the second limiting groove 81 to be welded to the two welding holes 13 respectively.
  • a current-mode amplifier circuit is used to process the sampling signal obtained by the alcohol detection module.
  • two ends of the alcohol detection module are connected in parallel with a switch tube, and a P-type MOS tube is used here. Turn on the MOS tube during sampling, and turn off the MOS tube to discharge the alcohol detection module after sampling, so that the charge balance of the alcohol detection module can be maintained when there is no measurement.
  • the current will change. The current signal is converted into a voltage signal and amplified, and then sent to the MCU processor for processing, and finally the result is output through a digital signal .
  • the current-mode sampling amplifier circuit includes an operational amplifier U1, a first capacitor C1, a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4, the source of the P-type MOS transistor and the
  • the non-inverting input terminal IN+ of the operational amplifier U1 is also connected to one end of the alcohol detection module J1, the drain of the P-type MOS tube is connected to the other end of the alcohol detection module J1, and the other end of the alcohol detection module J1 is also connected to the operational amplifier U1 through the first resistor R1.
  • the inverting input terminal IN-, the gate of the P-type MOS tube and the positive pole of the power supply of the operational amplifier are connected to the power supply VDD at the same time, and the gate of the P-type MOS tube is also grounded through the second resistor R2 and the third resistor R3 in turn, and the second resistor
  • the connection point of R2 and the third resistor R3 is connected to the non-inverting input terminal IN+ of the operational amplifier U1 at the same time; the first capacitor C1 and the fourth resistor R4 are connected in parallel between the inverting input terminal IN- of the operational amplifier U1 and the output terminal OUT of the operational amplifier at the same time.
  • the output terminal OUT of the operational amplifier U1 is connected to the input terminal of the MCU processor through an RC circuit.
  • the MCU processor is a single-chip microcomputer, and the input terminal of the above-mentioned MCU processor is an analog input signal terminal.
  • the operational amplifier U1 is an operational amplifier with high magnification. Since the signal sampled by the alcohol detection module J1 is a weak signal, it adopts the principle of single-power inversion amplification, and sets a bias voltage at the non-inverting input terminal, and the bias voltage can be adjusted.
  • the signal of the alcohol detection module J1 is processed by the sampling amplifying circuit and then sent to the analog input signal terminal of the MCU processor through an RC filter circuit. Specifically, the current signal output by the alcohol detection module J1 is converted into a voltage signal and amplified, and then sent to the analog input signal terminal of the MCU processor.
  • the alcohol detection module J1 samples the alcohol concentration gas
  • the current will change, and the sampled current signal will be converted into a voltage signal, amplified and sent to the MCU processor for processing, and the voltage signal will be processed by the MCU processor to obtain the alcohol content Concentration value
  • this concentration data is output through the digital interface of the MCU processor, so that the outside can read the data of the alcohol sensor through a processor or other communication smart devices.
  • the air pressure detection module in the alcohol sensor of the present application includes an air pressure sensor J2, and the signal of the air pressure sensor is a voltage signal, which can be directly input to the analog input terminal of the MCU processor.
  • the MCU processor samples the signal of the air pressure sensor J2, it processes the air pressure value of PX.
  • the air pressure value PX changes accordingly.
  • the user's air pressure value is judged.
  • the MCU processor starts to read the value of the alcohol detection module J1 and starts to calculate the amount of alcohol concentration.
  • the alcohol detection module J1 When the value of Px is less than the P1 (normal blowing pressure value) we set, the alcohol detection module J1 at this time can hardly detect the alcohol data. It can be determined that the user is not blowing enough at this time, and the data of the sensor is not read. And remind the user to re-blow.
  • the starting point is set to P1, and the alcohol detection module J1 can detect the alcohol concentration value only when the user's blowing pressure reaches above P1.
  • Air pressure has a certain proportional relationship. When the blowing pressure is higher, the alcohol concentration value will be higher. When the blowing air pressure reaches a certain value P2, the alcohol concentration will no longer be affected by the change in air pressure.
  • P2 we set this air pressure value as P2, we will record the measured alcohol concentration as Gx, and the actual output alcohol concentration value as G D , the relationship between the actual output alcohol concentration value and the detected alcohol concentration is:
  • P1 is the initial pressure value that can be measured by blowing air
  • P2 is the pressure value at which the air is completely sufficient and the alcohol concentration will not change.
  • P X is the measured pressure value during the measurement process
  • Gx is the measured alcohol concentration value
  • G D is the actual output alcohol concentration value
  • k is the measurement uncertainty coefficient (in actual measurement, different sensors will have certain differences Determinism, this uncertainty is used to adjust the accuracy of the actual output).
  • This concentration data is output through the digital interface of the MCU processor, so that the outside can read the data of the sensor through an MCU or other communication intelligent devices.
  • the alcohol detection module J1 and the air pressure detection module are integrated into the housing, and an airway is set on the housing. Since the airway is connected with the alcohol detection module J1, the air pressure detection module and the outside, it can be detected according to the user's blowing. Real-time judgment of whether there is insufficient air in the situation, reminding the user to re-blow or display the effective real-time concentration, even when the volume of the alcohol sensor is reduced, the authenticity and accuracy of the detection can still be achieved.
  • the present application also provides a smart device (not shown in the figure), which includes a main body, and the above-mentioned alcohol sensor based on the blowing method is arranged in the main body. Due to its small size and accurate testing, the alcohol sensor can be widely used in mobile phones, or daily wearable devices such as wristbands, watches, and glasses.

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Abstract

一种基于吹气方法的酒精传感器及智能设备，酒精传感器包括酒精检测模块、气压检测模块(11)、MCU处理器(12)、电路基板(10)以及罩设于电路基板(10)上的壳体(30)，酒精检测模块通过一采样放大电路模块将其浓度信号输出给MCU处理器(12)，气压检测模块(11)与MCU处理器(12)相连并实现气压信号的传输，MCU处理器(12)将浓度信号和气压信号进行处理后输出酒精浓度值。将酒精检测模块和气压检测模块(11)集成于壳体(30)内，由于两个模块与外部连通，在检测时能根据用户的吹气情况实时判断是否存在吹气不足的现象，提醒用户重新吹气或者显示有效的实时浓度，在酒精传感器体积减小的情况下，仍然能确保检测的真实性和准确性。

Description

一种基于吹气方法的酒精传感器及智能设备 技术领域
本申请属于智能设备技术领域，更具体地说，是涉及一种基于吹气方法的酒精传感器及智能设备。
背景技术
酒精传感器是用来检测人体呼出气体酒精含量的测试工具，也是交警用来执法时检测司机是否饮酒或饮酒多少的检测工具，可以有效避免交通事故的发生，同时也可应用在一些高危领域或禁止酒后上岗的领域。
现有的酒精传感器为了满足信号的要求，制作体积较大，应用具有局限性，一般仅应用在专业的酒精检测仪中，而且，在测试时有些人存在吹气量达不到要求而无法正常检测，现有的酒精传感器无法解决此问题，导致酒精检测仪在使用过程中检测效率较低。
技术问题
本申请实施例的目的在于提供一种基于吹气方法的酒精传感器及智能设备,解决了现有技术中酒精传感器在应用时无法检测吹气量，检测效率低的技术问题。
技术解决方案
为实现上述目的，本申请采用的技术方案是：提供一种基于吹气方法的酒精传感器，包括酒精检测模块、气压检测模块、MCU处理器、电路基板以及罩设于所述电路基板上的壳体，所述酒精检测模块通过一采样放大电路模块将其浓度信号输出给所述MCU处理器，所述气压检测模块与所述MCU处理器相连并 实现气压信号的传输，所述MCU处理器将所述浓度信号和气压信号进行处理后输出酒精浓度值。
进一步地，所述壳体具有与外部连通的第一容置腔，所述酒精检测模块设置在所述第一容置腔内，所述壳体底部具有第二容置腔，所述壳体顶部具有连通外部与所述第二容置腔的气道，所述气压芯片位于所述第二容置腔内。
进一步地，所述气道包括位于顶部的下沉式开口、沿所述下沉式开口向下延伸的漏斗型通道以及沿所述漏斗型通道向下延伸的柱状通道，所述柱状通道连通至所述第二容置腔。
进一步地，所述气压检测模块通过软胶固定于所述电路基板上。
进一步地，所述壳体还具有第三容置腔，所述MCU处理器位于所述第三容置腔内，且所述第三容置腔内填充有用于密封所述MCU处理器的密封胶。
进一步地，所述酒精检测模块包括设于所述第一容置腔内的第一固态电解质膜片、设于所述第一固态电解质膜片的顶面且与所述MCU处理器电连接的第一催化剂丝、设于所述第一固态电解质膜片的底面且与所述MCU处理器电连接的第二催化剂丝。
进一步地，还包括设于所述容置腔顶部的透气膜，外部气体穿过所述透气膜与所述第一固态电解质膜片、第一催化剂丝及第二催化剂丝发生反应。
进一步地，所述第一容置腔内且位于所述第一固态电解质膜片底部还设有膜片压板，所述膜片压板将所述第一固态电解质膜片、第一催化剂丝及第二催化剂丝固定于所述容置腔内，所述膜片压板通过密封胶固定于所述容置腔内。
进一步地，所述容置腔内且位于所述第一固态电解质膜片底部还设有第二固态电解质膜片，所述第二催化剂丝位于所述第二固态电解质膜片与所述第一固态电解质膜片之间。
进一步地，所述酒精检测模块的两端并接有一开关管，所述采样放大电路模块为电流型采样放大电路。
进一步地，所述开关管为P型MOS管,所述电流型采样放大电路包括运算放大器、第一电容、第一电阻、第二电阻、第三电阻和第四电阻，所述P型MOS管的源极和所述运算放大器的同相输入端同时连接所述酒精检测模块的一端，所述P型MOS管的漏极连接所述酒精检测模块的另一端，所述运算放大器的反相输入端通过所述第一电阻连接所述酒精检测模块的另一端，所述P型MOS管的栅极和所述运算放大器的电源正极同时接电源VDD，所述P型MOS管的栅极还依次通过所述第二电阻、第三电阻接地，所述第二电阻和第三电阻的连接点同时接所述运算放大器的同相输入端；所述第一电容与所述第四电阻同时并联在所述运算放大器的反相输入端与所述运算放大器的输出端之间，所述运算放大器的输出端通过一RC电路连接所述MCU处理器的输入端。
本申请还提供了一种智能设备，包括主体，所述主体内设有上述的基于吹气方法的酒精传感器。
有益效果
本申请的有益效果在于：与现有技术相比，本申请将酒精检测模块和气压检测模块集成于壳体内，由于酒精检测模块、气压检测模块及外部连通，在检测时能根据用户的吹气情况实时判断是否存在吹气不足的情况，提醒用户重新吹气或者显示有效的实时浓度，在酒精传感器体积减小的情况下，仍然能确保检测的真实性和准确性。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅 仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的基于吹气方法的酒精传感器的俯视图；
图2为图1中沿A-A的剖视图；
图3为图1中沿B-B的剖视图；
图4为图1中沿C-C的剖视图；
图5为本申请实施例提供的基于吹气方法的酒精传感器的分解示意图；
图6为本申请实施例提供的基于吹气方法的酒精传感器的电路结构示意图；
其中，图中各附图标记：
10-电路基板；11-气压检测模块；12-MCU处理器；13-焊接孔；20-第一固态电解质膜片；30-壳体；31-第一容置腔；311-底腔室；312-顶开口；313-通道；33-气道；34-第二容置腔；35-第三容置腔；40-第二固态电解质膜片；60-第一催化剂丝；61-第一反应部；62-第一连接部；63-第一固定部；50-第二催化剂丝；51-第二反应部；52-第二连接部；53-第二固定部；511-第二反应部的中部；512-第二反应部的两端；70-透气膜；80-膜片压板；82-第一限位槽；81-第二限位槽。
本发明的实施方式
为了使本申请所要解决的技术问题、技术方案及有益效果更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。
需要说明的是，当元件被称为“固定于”或“设置于”另一个元件，它可 以直接在另一个元件上或者间接在该另一个元件上。当一个元件被称为是“连接于”另一个元件，它可以是直接连接到另一个元件或间接连接至该另一个元件上。
需要理解的是，术语“长度”、“宽度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
请一并参阅图1至图6，现对本申请实施例提供的基于吹气方法的酒精传感器进行说明。
本实施例提供的基于吹气方法的酒精传感器，整体呈长方体状。其包括电路基板10、设于电路基板10上的气压检测模块11及MCU处理器12，以及罩设于电路基板10上的壳体30，壳体30具有与外部连通的第一容置腔31，第一容置腔31内设有酒精检测模块，壳体30设有与外部连通的气道33，气压检测模块11位于气道33的底部，酒精检测模块通过一采样放大电路模块将其浓度信号输出给MCU处理器12，气压检测模块11与MCU处理器12相连并实现气压信号的传输，MCU处理器12将所述浓度信号和气压信号进行处理后输出酒精浓度值。
本申请中，在传感器中增加气压检测模块11，并在壳体30内设置气道33， 检测时吹入的气体一部分通过酒精检测模块进行酒精检测，一部分气体通过气道作用于气压检测模块11，当气压检测模块11监测到的气压值小于设定的正常吹气的压力值时，此时可认定用户吹气不足，不读取酒精检测结果，并提醒用户重新吹气。本申请中的酒精传感器由于设置了上述的气压检测模块11及MCU处理器12，增加了提醒吹气的功能，将其应用于各种检测设备时，提高了检测效率。
参照图4，壳体30底部具有第二容置腔34，气压检测模块11位于第二容置腔34内，气道33由壳体30的顶部向下贯通至第二容置腔34。通过设置第二容置腔34来放置气压检测模块11，使得气压检测模块11完全置于壳体30内，气道33与第二容置腔34连通，这样，密封性能更好，从而确保气压监测的准确性。
具体地，气道33可分为三部分，包括位于顶部的下沉式开口331、沿下沉式开口331向下延伸的漏斗型通道332以及沿漏斗型通道332向下延伸的柱状通道333，柱状通道333连通至第二容置腔34。通过将开口下沉，降低了通道的高度，缩短了气体与气压检测模块11的距离；同时，下沉式开口331与漏斗型通道332扩大了进气面积，使气体能更容易进入柱状通道333，实现快速监测。
进一步地，气压检测模块11通过软胶(图中未示出)固定于电路基板10上。此处设置软胶，一方面将气压检测模块11与电路基板10上的线路固定于一体；另一方面，当气体向下作用于气压检测模块11时，气压检测模块11会产生向下的形变，而气压检测模块11底部的软胶则起到缓冲作用，为气压检测模块11提供了形变空间。
本实施中，壳体30还具有第三容置腔35，将MCU处理器12置于电路基 板10上且位于第三容置腔35后，通过向第三容置腔35内填充有密封胶36，起到固定MCU处理器12以及密封第三容置腔35的作用，避免气体进入第三容置腔35，确保有更多的气体进入气道作用于气压检测模块11。
本实施例中，位于第一容置腔31内的酒精检测模块包括设于第一容置腔31内的第一固态电解质膜片20、设于第一固态电解质膜片20的顶面与MCU处理器12电连接的第一催化剂丝60、设于第一固态电解质膜片20的底面与MCU处理器12电连接的第二催化剂丝50。
本实施例中，在紧凑的壳体30内设置第一固态电解质膜片20、第一催化剂丝60及第二催化剂丝50等酒精测试部件，使酒精传感器内部结构更紧凑，而且电路基板10在实现电连接的同时可作为底壳的一部分，减少了整个传感器的高度，能更好地实现轻薄化，集成度也更高，能更好地应用于各种智能设备。
进一步地，本实施例中，第一容置腔31内且位于第一固态电解质膜片20底部还设有第二固态电解质膜片40，第二催化剂丝50位于第二固态电解质膜片40与第一固态电解质膜片20之间。通过设置两固态电解质膜片，提升酒精与膜片及催化剂丝的反应效果。
本实施例中，第一固态电解质膜片20和第二固态电解质膜片40横截面大致呈正方形，其尺寸可为4mm*4mm。当然，固态电解质膜片的尺寸也可以根据酒精传感器整体的需求尺寸来进行调整。固态电解质膜片作为质子交换膜，具有良好的化学耐受性和良好的机械性能，因此，固态电解质膜片的厚度可以很薄，能保证在反应时离子的自由移动，并且具有酸性，达到可以和空气中酒精产生反应的效果。
第一催化剂丝60与第二催化剂丝50结构大致相同，且结构也可为多样。 如第一催化剂丝60和第二催化剂丝50可以呈倒L型。即第一催化剂丝60包括水平的第一反应部61及沿第一反应部61向下弯折的第一连接部62，第一反应部61贴设于第一固态电解质膜片20顶面，第一连接部62沿第一固态电解质膜片20的侧面伸出与电路基板10电连接；第二催化剂丝50包括水平的第二反应部51及沿第二反应部51向下弯折的第二连接部52，第二反应部51贴设于第二固态电解质膜片40顶面，第二连接部52沿第二固态电解质膜片40的侧面伸出与电路基板10电连接。进行检测时，气体由第一容置腔31顶部进入与第一固态电解质膜片20及第二固态电解质膜片40发生化学反应产生足够的电荷，而第一催化剂丝60和第二催化剂丝50作为导电电极伸出与电路基板10进行电连接，从而实现信号的传递。
在安装时，两催化剂丝与两固态电解质膜片之间相互压紧设置。而为了使两催化剂丝的固定更牢固，避免脱落。本实施例中，两催化剂采用如图6中所示的结构。
第一催化剂丝60还包括沿第一反应部61的端部向下弯折的第一固定部63，第一固定部63贴设于第一固态电解质膜片20的侧面，且与第一连接部62相对；第二催化剂丝50还包括沿第二反应部51的端部向下弯折的第二固定部53，第二固定部53贴设于第二固态电解质膜片40的侧面，且与第二连接部52相对。这样，在安装时，第一催化剂丝60的第一固定部63勾于第一固态电解质膜片20的一侧面，而第一连接部62由第一固态电解质膜片20相对的另一侧面伸出；同样的，第二催化剂丝50的第二固定部53勾于第二固态电解质膜片40的一侧面，而第二连接部52由第二固态电解质膜片40相对的另一侧面伸出。采用这样的结构，第一催化剂丝60与第二催化剂丝50的安装更牢固，不易脱落。
第一催化剂丝60与第二催化剂丝50虽然没有直接接触，本实施例中，但是从空间上，第一催化剂丝60与第二催化剂丝50是交叉设置，即反应部分的第一反应部61与第二反应部51呈十字型设置，这样，第一连接部62与第二连接部52则可由固态电解质膜片的不同侧面伸出，避免由同一侧面伸出时相互接触而发生短路。当然，第一催化剂丝60与第二催化剂丝50也可以采用其它的方式设置，如平行或非平行方式等。只要保证两催化剂丝的连接部不相互接触即可。
为使两固态电解质膜片及两催化剂丝更好地固定于第一容置腔31内，本实施例中，在第一容置腔31内且位于第一固态电解质膜片20底部还设有膜片压板80。在安装时，先将壳体30倒置，依次装入第二催化剂丝50、第二固态电解质膜片40、第一催化剂丝60及第一固态电解质膜片20，然后用膜片压板80将其压紧，最后再通过密封胶密封固定。
本实施例中，由于在底部设置膜片压板80，为使第一催化剂丝60及第二催化剂丝50更好地伸出与电路基板10电连接，在膜片压板80的侧壁分别设置第一限位槽82与第二限位槽81，第一催化剂丝60的第一连接部62沿第一限位槽82内向下伸出与电路基板10电连接，第二催化剂丝50的第二连接部52沿第二限位槽81向下伸出与电路基板10电连接。
由图5可以看出，本实施例中，第一容置腔31上下贯通，且按贯通大小可分为三部分，即底腔室311、顶开口312以及连通底腔室311与顶开口312的通道313。膜片压板80、第一固态电解质膜片20及第二固态电解质膜片40依次置于底腔室311内，透气膜70置于顶开口312内，而位于底腔室311与顶开口312之间的通道313内填充有空气，这样，保证第一固态电解质膜片20、第二固态电解质膜片40及透气膜70能与气体充分接触，从而形成足够大 的电流，保证测试的准确性。而且在上述结构中，第二催化剂丝50的第二反应部51的中部611正对通道313，底腔室311的顶壁压设于第二反应部51的两端部。这样，一方面，第二催化剂丝50的第二反应部51能与通道313、顶开口312内的空气充分接触，另一方面，底腔室311的顶壁将第二反应部51的两端部612起到一定的按压作用，使第二催化剂丝50与第二固态电解质膜片40之间能更好的固定。
本实施例中，顶开口312为设于壳体30顶面的下沉式台阶孔，下沉式台阶孔的台阶面上设有透气膜70，外部气体可穿过透气膜70与第一固态电解质膜片20、第一催化剂丝60及第二催化剂丝50发生反应。透气膜70能过滤气体中的水汽、灰尘，但同时透气性能好，确保干净气体通过使检测更准确。当然，本实施例中的酒精传感器中也可以省略透气膜70，在将酒精传感器具体应用到各种装置或设备时，于装置或设备上设置透气膜70，同样也能起到防水、防尘及透气的作用。下沉式台阶孔的横截面呈方形，而与之连通的通道313及底腔室311的横截面也为方形。采用方形的顶开口，能在有限的面积内将进气口做到最大，这样可以有效的保障足够的进气量，从而使得微型、酒精传感器不会比传统的酒精传感器信号小，而方形的第一容置腔31体积大，有利于酒精与两催化剂丝及两固态电解质膜片进行化学反应。
进一步地，本实施例中，第一容置腔31内还设有加热装置(图中未示出)。加热装置具体可为加热片，在测试后通过对第一容置腔31进行加热，使带有酒精的气体能快速挥发，第一容置腔31内无气体残留，也是将第一容置腔31内酒精进行清零，保证下一次测试的准确性。
本实施例中，第一催化剂丝60和第二催化剂丝50的材质为贵金属。具体地，贵金属可以为铂金丝，当然，也可以采用其它贵金属来制作催化剂丝。
本实施例中，电路基板10包括电路基板11以及设于电路基板上的元器件(图中未示出)。电路基板11上设有两焊接孔13，第一催化剂丝60与第二催化剂丝50由第一限位槽82、第二限位槽81伸出后分别与此两焊接孔13进行焊接。
并且，在本实施例中，将酒精检测模块获取的采样信号进行处理的是一电流型放大电路。参考图6的电路结构示意图，酒精检测模块的两端并接有一开关管，这里采用的是P型MOS管。在采样的时候打开MOS管，采样结束后关闭MOS管对酒精检测模块进行放电，这样可以在没有测量的时候保持酒精检测模块的电荷平衡。具体工作时，当酒精检测模块采样到含有一定酒精浓度的气体时，电流会发生改变，该电流信号经转化为电压信号并放大后，输送到MCU处理器进行处理，最终将结果通过数字信号输出。
由图6所示，该电流型采样放大电路包括运算放大器U1、第一电容C1、第一电阻R1、第二电阻R2、第三电阻R3和第四电阻R4，P型MOS管的源极和运算放大器U1的同相输入端IN+同时连接酒精检测模块J1的一端，P型MOS管的漏极连接酒精检测模块J1的另一端，酒精检测模块J1的另一端还通过第一电阻R1连接运算放大器U1的反相输入端IN-，P型MOS管的栅极和运算放大器的电源正极同时接电源VDD，P型MOS管的栅极还依次通过第二电阻R2、第三电阻R3接地，第二电阻R2和第三电阻R3的连接点同时接运算放大器U1的同相输入端IN+；第一电容C1与第四电阻R4同时并联在运算放大器U1的反相输入端IN-与运算放大器的输出端OUT之间，运算放大器U1的输出端OUT通过一RC电路连接MCU处理器的输入端。
在该实施例中，MCU处理器为单片机，上述的MCU处理器的输入端为模拟输入信号端。运算放大器U1为高放大倍数的运放，由于对酒精检测模块J1 采样到的信号是微弱信号，采用单电源反相放大原理，在同相输入端设置偏置电压，偏置电压可以调节。酒精检测模块J1的信号经过采样放大电路处理后经过一个RC滤波电路，送到MCU处理器的模拟输入信号端。具体地，将酒精检测模块J1输出的电流信号经转化为电压信号并放大后，输送到MCU处理器的模拟输入信号端。
当酒精检测模块J1采样到酒精浓度的气体时，电流会发生改变，将采样的电流信号转换为电压信号并放大后送到MCU处理器进行处理，将电压信号经过MCU处理器处理得出酒精的浓度值，这个浓度数据通过MCU处理器的数字接口输出，这样外部可以通过一个处理器或者其他通讯智能设备读取到酒精传感器的数据。
同时，本申请酒精传感器中的气压检测模块包括气压传感器J2，气压传感器信号为电压信号，可以直接将此信号输入到MCU处理器的模拟输入端。MCU处理器采样到气压传感器J2的信号后，即进行处理得出吹气气压值为PX，当用户吹气压力发生改变时，气压值PX随之发生变化，根据PX的变化来判断用户吹气的大小程度，当Px的值大于我们设定的P1(正常吹气的压力值)时，MCU处理器开始读取酒精检测模块J1的数值，并开始计算酒精浓度的量。当Px的值小于我们设定的P1(正常吹气的压力值)时，此时的酒精检测模块J1几乎检测不到酒精数据，可以认定此时用户吹气不够，不读取传感器的数据，并提醒用户重新吹气。
由于气压传感器J2是用来监测用户吹气压力等级的，设置起始点为P1,用户只有在吹气压力达到P1以上时，酒精检测模块J1才可以检测到酒精浓度值，而酒精浓度的大小和气压具有一定的比例关系，当吹气压力越大时，酒精浓度值会越高。而当吹气气压达到一定数值P2后，酒精浓度就不再受到气压 变化的影响，我们设定这个气压值为P2,我们将测量到的酒精浓度记为Gx，实际输出的酒精浓度值记为G D，则实际输出的酒精浓度值与被检测的酒精浓度之间的关系为：
当P X＜P1时：G D＝0；
当P1＜＝P X＜＝P2时：
Figure PCTCN2020134082-appb-000001
当P X＞P2时：G D＝ Gx；
P1为吹气可以开始测量的起始压力值，
P2为吹气完全足够，酒精浓度不会再变化的压力值
P X为测量过程中实测的压力值，Gx为测量到的酒精浓度值，G D为实际输出的酒精浓度值；k为测量不确定度系数(在实际的测量中，不同传感器都会存在一定不确定性，这个不确定度用来调节实际输出的精度)。这个浓度数据通过MCU处理器的数字接口输出，这样外部可以通过一个MCU或者其他通讯智能设备读取到本传感器的数据。
本申请将酒精检测模块J1和气压检测模块集成于壳体内，同时在壳体上设置气道，由于气道与酒精检测模块J1、气压检测模块及外部连通，在检测时能根据用户的吹气情况实时判断是否存在吹气不足的现象，提醒用户重新吹气或者显示有效的实时浓度，在酒精传感器体积减小的情况下，仍然能检测的真实和准确性。
本申请还提供了一种智能设备(图中未示出)，包括主体，主体内设有上述的基于吹气方法的酒精传感器。由于酒精传感器体积小，且测试准确，可广泛应用于手机，或者手环、手表、眼镜等日常穿戴设备。
以上仅为本申请的较佳实施例而已，并不用以限制本申请，凡在本申请的 精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本申请的保护范围之内。

Claims (12)

  1. 一种基于吹气方法的酒精传感器，其特征在于：包括酒精检测模块、气压检测模块、MCU处理器、电路基板以及罩设于所述电路基板上的壳体，所述酒精检测模块通过一采样放大电路模块将其浓度信号输出给所述MCU处理器，所述气压检测模块与所述MCU处理器相连并实现气压信号的传输，所述MCU处理器将所述浓度信号和气压信号进行处理后输出酒精浓度值。
  2. 如权利要求1所述的基于吹气方法的酒精传感器，其特征在于：所述壳体具有与外部连通的第一容置腔，所述酒精检测模块设置在所述第一容置腔内，所述壳体底部具有第二容置腔，所述壳体顶部具有连通外部与所述第二容置腔的气道，所述气压芯片位于所述第二容置腔内。
  3. 如权利要求2所述的基于吹气方法的酒精传感器，其特征在于：所述气道包括位于顶部的下沉式开口、沿所述下沉式开口向下延伸的漏斗型通道以及沿所述漏斗型通道向下延伸的柱状通道，所述柱状通道连通至所述第二容置腔。
  4. 如权利要求1所述的基于吹气方法的酒精传感器，其特征在于：所述气压检测模块通过软胶固定于所述电路基板上。
  5. 如权利要求1所述的基于吹气方法的酒精传感器，其特征在于：所述壳体还具有第三容置腔，所述MCU处理器位于所述第三容置腔内，且所述第三容置腔内填充有用于密封所述MCU处理器的密封胶。
  6. 如权利要求1至5中任一项所述的基于吹气方法的酒精传感器，其特征在于：所述酒精检测模块包括设于所述第一容置腔内的第一固态电解质膜片、设于所述第一固态电解质膜片的顶面且与所述MCU处理器电连接的第一催 化剂丝、设于所述第一固态电解质膜片的底面且与所述MCU处理器电连接的第二催化剂丝。
  7. 如权利要求6所述的基于吹气方法的酒精传感器，其特征在于：还包括设于所述容置腔顶部的透气膜，外部气体穿过所述透气膜与所述第一固态电解质膜片、第一催化剂丝及第二催化剂丝发生反应。
  8. 如权利要求7所述的基于吹气方法的酒精传感器，其特征在于：所述第一容置腔内且位于所述第一固态电解质膜片底部还设有膜片压板，所述膜片压板将所述第一固态电解质膜片、第一催化剂丝及第二催化剂丝固定于所述容置腔内，所述膜片压板通过密封胶固定于所述容置腔内。
  9. 如权利要求6所述的基于吹气方法的酒精传感器，其特征在于：所述容置腔内且位于所述第一固态电解质膜片底部还设有第二固态电解质膜片，所述第二催化剂丝位于所述第二固态电解质膜片与所述第一固态电解质膜片之间。
  10. 如权利要求1所述的基于吹气方法的酒精传感器器，其特征在于：所述酒精检测模块的两端并接有一开关管，所述采样放大电路模块为电流型采样放大电路。
  11. 如权利要求10所述的基于吹气方法的酒精传感器，其特征在于：所述开关管为P型MOS管,所述电流型采样放大电路包括运算放大器、第一电容、第一电阻、第二电阻、第三电阻和第四电阻，所述P型MOS管的源极和所述运算放大器的同相输入端同时连接所述酒精检测模块的一端，所述P型MOS管的漏极连接所述酒精检测模块的另一端，所述运算放大器的反相输入端通过所述第一电阻连接所述酒精检测模块的另一端，所述P型MOS管的栅极和所述运算放大器的电源正极同时接电源VDD，所述P型MOS管的栅极还依次通过所述第 二电阻、第三电阻接地，所述第二电阻和第三电阻的连接点同时接所述运算放大器的同相输入端；所述第一电容与所述第四电阻同时并联在所述运算放大器的反相输入端与所述运算放大器的输出端之间，所述运算放大器的输出端通过一RC电路连接所述MCU处理器的输入端。
  12. 一种智能设备，包括主体，其特征在于：所述主体内设有如权利要求1至11中任一项所述的基于吹气方法的酒精传感器。
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CN116106526A (zh) * 2023-04-11 2023-05-12 沈阳德安智能科技股份有限公司 一种酒精检测方法及装置
CN116106526B (zh) * 2023-04-11 2023-06-09 沈阳德安智能科技股份有限公司 一种酒精检测方法及装置

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