CN114779112B - Power panel test circuit and power panel test equipment - Google Patents
Power panel test circuit and power panel test equipmentInfo
- Publication number
- CN114779112B CN114779112B CN202210422141.7A CN202210422141A CN114779112B CN 114779112 B CN114779112 B CN 114779112B CN 202210422141 A CN202210422141 A CN 202210422141A CN 114779112 B CN114779112 B CN 114779112B
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- circuit
- test
- power
- main control
- control circuit
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Measuring voltage only
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses a power panel test circuit and power panel test equipment, wherein the power panel is applied to a TV, and the power panel test circuit comprises a main control circuit, a power panel test circuit and a power panel test circuit, wherein the output end of the main control circuit is used for accessing a power panel to be tested; the main control circuit is used for simulating a control signal sent to the power panel to be tested by the main board of the TV and sending the simulated control signal to the power panel to be tested so as to drive the power panel to be tested to work. The invention can simulate the control signals of different mainboards, thereby greatly improving the convenience of test and the test efficiency.
Description
Technical Field
The present invention relates to the field of power panel testing, and in particular, to a power panel testing circuit and a power panel testing device.
Background
As the name suggests, a TV (Television) power board is a board mainly processed by a power supply, along with development of technology, TV requirements on the power supply are also higher and higher, power supply processing modes are more and more diversified along with complexity of subsequent circuit requirements, and the structure of the power board is more and more complex, the process is more and more complicated, in order to ensure the yield of the power board, a series of strict tests need to be performed on the power board, and when the power board is abnormal, on-off, power failure, over-temperature and other detection needs to be performed on the power board.
However, there is no debugging device dedicated to a TV power panel in the market at present, when testing the power panel, a flying wire needs to be connected from a main board of the TV to the power panel to output a control signal to drive the power panel to output a corresponding voltage, and the flying wire is troublesome and unstable, resulting in lower testing efficiency.
Disclosure of Invention
The invention mainly aims to provide a power panel test circuit and power panel test equipment, and aims to solve the technical problem of low test efficiency of a TV power panel in the prior art.
In order to achieve the above object, the present invention provides a power panel test circuit, which is applied to a TV, including:
The output end of the main control circuit is used for being connected with a power panel to be tested;
the main control circuit is used for simulating a control signal sent to the power panel to be tested by the main board of the TV and sending the simulated control signal to the power panel to be tested so as to drive the power panel to be tested to work.
Optionally, the power panel test circuit further includes:
testing the power supply input end;
The input end of the switching circuit is connected with the input end of the test power supply, and the output end of the switching circuit is used for being connected with a power panel to be tested;
The main control circuit is also used for sending a power-on signal or a power-off signal;
the switch circuit is used for switching on the power panel and the test power supply when receiving the power on signal, and switching off the power panel and the test power supply when receiving the power off signal.
Optionally, the power panel test circuit further comprises an input voltage sampling circuit, wherein the input end of the input voltage sampling circuit is connected with the input end of the test power supply, and the output end of the input voltage sampling circuit is connected with the main control circuit;
the input voltage sampling circuit is used for sampling the power supply voltage input to the power panel by the test power supply and outputting an input voltage signal;
The main control circuit is also used for receiving the input voltage signal and outputting the power supply start signal with preset frequency and/or preset duration according to the input voltage signal.
Optionally, the power panel test circuit further includes an output voltage sampling circuit, an input end of the output voltage sampling circuit is connected with an output end of the power panel, and an output end of the output voltage sampling circuit is connected with the main control circuit;
the output voltage sampling circuit is used for sampling the output voltage of the power panel and outputting a corresponding output voltage signal;
and the main control circuit is also used for determining whether the power failure occurs to the power panel to be tested according to the output voltage signal.
Optionally, the power panel test circuit further comprises a temperature sampling circuit, wherein the output end of the temperature sampling circuit is connected with the main control circuit;
The temperature sampling circuit is used for detecting the temperature of the power panel and outputting a corresponding temperature signal;
the main control circuit is also used for receiving the temperature signal and determining whether the power panel to be tested has an over-temperature fault or not according to the temperature signal.
Optionally, the power panel test circuit further comprises an alarm circuit, and the alarm circuit is connected with the main control circuit;
The main control circuit is also used for triggering an alarm circuit to alarm when the output voltage signal accords with a preset fault voltage range or when the temperature signal reaches a preset over-temperature threshold value.
Optionally, the power panel test circuit further comprises a storage circuit, and the storage circuit is connected with the main control circuit;
the main control circuit is also used for sending the acquired test data to the storage circuit for storage.
Optionally, the power panel test circuit further includes a wireless communication circuit, the wireless communication circuit is connected with the main control circuit, and the wireless communication circuit is used for realizing communication connection between the main control circuit and the terminal.
Optionally, the power panel test circuit further comprises a display module, and the display module is connected with the main control circuit;
the main control circuit is also used for sending the acquired test data to the display module for display.
In addition, to achieve the above object, the present invention also provides a power panel test apparatus including a power panel test circuit configured as the power panel test circuit described above.
The invention provides a power panel test circuit and power panel test equipment, wherein the power panel is a TV power panel and comprises a main control circuit, the output end of the main control circuit is used for being connected with a power panel to be tested, and the main control circuit is used for simulating a control signal sent to the power panel by a main board of the TV and sending the simulated control signal to the power panel to be tested so as to drive the power panel to be tested to work. From this, send control signal through main control circuit analog TV's mainboard to satisfy the demand of drive power strip work, no longer need be connected power strip and mainboard through the wire, be convenient for test more. Especially when different mainboards are required to be tested, the main control circuit can simulate control signals of different mainboards, so that the convenience of testing is greatly improved, and the testing efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a functional module of an embodiment of a power panel test circuit according to the present invention;
FIG. 2 is a schematic diagram of a functional module of another embodiment of the power panel test circuit of the present invention;
FIG. 3 is a schematic diagram of a circuit structure of a first relay circuit in an embodiment of a power panel test circuit according to the present invention;
FIG. 4 is a schematic diagram of a circuit structure of a second relay circuit in an embodiment of a power panel test circuit according to the present invention;
fig. 5 is a schematic circuit diagram of a wireless communication circuit according to an embodiment of the power panel test circuit of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Reference numerals illustrate:
| Reference numerals | Name of the name | Reference numerals | Name of the name |
| 100 | Power panel | 70 | Temperature sampling circuit |
| 200 | Test power input terminal | 21 | First relay circuit |
| 10 | Main control circuit | 22 | Second relay circuit |
| 20 | Switching circuit | RL1 | First relay |
| 30 | Memory circuit | RL2 | Second relay |
| 40 | Input voltage sampling circuit | Q1 | First switch tube |
| 50 | Output voltage sampling circuit | Q2 | Second switch tube |
| 60 | Alarm circuit | U1 | ESP01 module |
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear are used in the embodiments of the present invention) are merely for explaining the relative positional relationship, movement conditions, and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides a power panel test circuit, which is applied to a TV.
Referring to fig. 1, in an embodiment, the power panel test circuit includes:
The main control circuit 10, the output end of the main control circuit 10 is used for accessing the power panel 100 to be tested;
The main control circuit 10 is configured to simulate a control signal sent from a main board of the TV to the power panel 100 and send the simulated control signal to the power panel 100 to be tested, so as to drive the power panel 100 to be tested to work.
It can be understood that, when the power panel 100 is detected, a control signal must be output by the motherboard to simulate the state of the power panel 100 when it is actually operated, and the power panel 100 is controlled to output a corresponding voltage, such as 12V, 5V or 3.3V. Therefore, when the power panel 100 is subjected to on/off detection, temperature detection or power failure detection, the main control circuit 10 sends out a control signal sent to the power panel 100 by the main board of the simulated TV, so as to drive the power panel 100 to be tested to work. The main control circuit 10 can be selected according to actual needs, for example, a singlechip, and has low cost and easy realization.
Because different TVs have different types of mainboards, the main control circuit 10 can simulate the mainboards of any type to output control signals, and the time sequence of the control signals can be changeable.
The control signal also includes a PWM dimming signal. Some power boards 100 are analog dimmed, i.e., change brightness by changing voltage and current, so the main board also needs a PWM dimming signal with adjustable output frequency and duty cycle to control the power output voltage of the power board 100. The main control circuit 10 can simulate the PWM with adjustable main board output frequency and duty ratio, and can meet the debugging requirement of the power panel 100 of the simulated dimming technology, so that the compatibility of different power panels 100 can be improved, the trouble of matching the corresponding main board with the power panel 100 is omitted during testing, the testing convenience is improved, and the efficiency is improved.
The main control circuit 10 is further configured to simulate an SPI signal sent from a main board of the TV to the power panel 100, and send the simulated SPI signal to a constant current board in the power panel 100 to be tested, so as to drive the constant current board to work. The control signal also includes the SPI signal to facilitate detection of the power board 100 including the constant current board.
In this embodiment, the main control circuit 10 is provided to access the power board 100 to be tested, and the main control circuit 10 is provided to simulate the control signal sent from the main board of the TV to the power board 100 and send the simulated control signal to the power board 100 to be tested, so as to drive the power board 100 to be tested to work. From this, the main board of the analog TV of the main control circuit 10 sends out control signals, thereby meeting the requirement of driving the power panel 100 to work, and the power panel 100 is not required to be connected with the main board through a lead wire, so that the test is more convenient. Especially when testing different mainboards, the main control circuit 10 can simulate the control signals of different mainboards, thereby greatly improving the convenience of testing and the testing efficiency.
Further, referring to fig. 2, the power board test circuit further includes:
A test power input 200;
The input end of the switching circuit 20 is used for being connected with the test power supply input end 200, and the output end of the switching circuit 20 is used for being connected with the power panel 100 to be tested;
the main control circuit 10 is further configured to send a power on signal or a power off signal;
the switch circuit 20 is configured to switch on the power board 100 and the test power source when receiving the power on signal, and switch off the power board 100 and the test power source when receiving the power off signal.
The power supply to be tested can be a 220V alternating current power supply, and can be specifically selected according to the power supply requirement of the current board. The switch circuit 20 may be a relay circuit, and the structure of the relay circuit may be set according to actual needs. Referring to fig. 3 to 4, the switch circuit 20 may include a first relay circuit 21 and a second relay circuit 22, wherein a first end (l_in) of a normally open contact of the first relay RL1 IN the first relay circuit 21 is a live wire input end of the switch circuit 20, a first end (n_in) of a normally open contact of the second relay RL2 IN the second relay circuit 22 is a neutral wire input end of the switch circuit 20, a first end of a normally open contact of the first relay RL1 and a first end of a normally open contact of the second relay RL2 are respectively used for connecting with the live wire and the neutral wire of the test power input end 200, and a second end (l_out) of a normally open contact of the first relay RL1 and a second end (n_out) of a normally open contact of the second relay RL2 are output ends of the switch circuit 20 for connecting with the power board 100 to be tested.
When the on-off test is to be performed, the main control circuit 10 controls the output JDQ1 signal and JDQ2 signal to be at high level, so that the first switching tube Q1 of the first relay circuit 21 and the second Q2 of the second relay circuit 22 are turned on, the coils of the first relay RL1 and the second relay RL2 are powered on, so that the normally open contacts of the first relay RL1 and the second relay RL2 are controlled to be closed, the power board 100 to be tested is turned on with the test power input end 200, the test power supplies power to the power board 100 to be tested, and when the JDQ1 signal and the JDQ2 signal output by the main control circuit 10 are at low level, the power board 100 to be tested is turned off with the test power input end 200, and the power board 100 to be tested is powered off.
The safety is high by controlling the weak voltage of the main control circuit 10 to be a strong voltage of 220V. The frequency and duration of the power on signal or the power off signal sent by the main control circuit 10 can be adjusted as required, so as to facilitate the detection of the state of the power panel 100 to be tested under different power on and power off conditions.
Further, referring to fig. 2 again, the power panel test circuit further includes a storage circuit 30, the storage circuit 30 is connected to the main control circuit 10, and the main control circuit 10 is further configured to send the acquired test data to the storage circuit 30 for storage.
The test data is data related to a test that can be specifically obtained by the main control circuit 10 during the test of the power panel 100, for example, the frequency and duration of a power on signal or a power off signal output by the main control circuit 10, a temperature sampling signal received by the main control circuit 10 during temperature detection, an output voltage signal received by the main control circuit 10 during output voltage electrical detection, an input voltage signal value received by the main control circuit 10 during input voltage detection, and the like. The duration may include a duration of a power-on test and a duration of outputting a power-on signal. By recording the test data to the external memory circuit 30, it is possible to prevent the loss of the power-down data, thereby facilitating the analysis of the test data at a later stage.
At present, when the on-off test is carried out, the on-off impact tester is needed to be used, the on-off impact tester is expensive, occupies a small volume, and is not portable to use. And the on-off impact tester can only simulate fast on-off, can not record detailed data such as on-off time, times and the like, and is inconvenient for later analysis. In this embodiment, the power panel test circuit may set a test duration and a test frequency, and may record the test data, thereby facilitating data analysis and reducing an occupied volume.
Further, the power panel test circuit further comprises an input voltage sampling circuit 40, wherein an input end of the input voltage sampling circuit 40 is connected with the test power supply input end 200, an output end of the input voltage sampling circuit 40 is connected with the main control circuit 10, the input voltage sampling circuit 40 is used for sampling a power supply voltage input to the power panel 100 from the test power supply input end and outputting an input voltage signal, and the main control circuit 10 is also used for receiving the input voltage signal and outputting the power supply start signal with preset frequency and/or preset duration according to the input voltage signal.
The power panel 100 is specifically configured to detect output power of a power device on the power panel 100 by using a power detection device in a state that the power panel 100 is continuously powered on and powered off, and power is turned on at a peak value of 220V ac, so that voltage and current applied to the power device are maximized due to the fact that stress of the power device can be better detected if the power panel 100 is turned on at the peak value of 220V ac.
The conventional on-off tester cannot detect the phase of 220V ac and cannot control when to switch. In this embodiment, the power-on signal with a preset frequency and/or a preset duration is output according to the input voltage signal, specifically, the power-on signal with a preset frequency and/or a preset duration is output according to the phase of the input voltage signal, so that the main control circuit 10 can control the switch circuit 20 to turn on the switch at the peak of the alternating current of the test power supply, so as to facilitate the debugging with special requirements.
Further, the power panel test circuit further comprises an output voltage sampling circuit 50, wherein an input end of the output voltage sampling circuit 50 is connected with an output end of the power panel 100, an output end of the output voltage sampling circuit 50 is connected with the main control circuit 10, the output voltage sampling circuit 50 is used for sampling an output voltage of the power panel 100 and outputting a corresponding output voltage signal, and the main control circuit 10 is further used for determining whether the power panel 100 to be tested has a power failure or not according to the output voltage signal.
There is no power down detector in the TV industry, and only an oscilloscope can be used to measure the output voltage output by the power panel 100 to capture the power down signal. However, when the output voltage is abnormal, if the output voltage does not reach the preset output range or power failure occurs, the oscilloscope cannot automatically record, and a tester is required to be kept on the test site. And the display wave occupies larger space, and some places with low signal requirements do not need an oscilloscope.
In this embodiment, the output voltage sampling circuit 50 may sample the voltage at the output end of the power panel 100, and the main control circuit 10 processes the voltage, so as to identify whether the output voltage is abnormal, thereby realizing detection of the output voltage, and saving space and portability compared with an oscilloscope. In addition, the main control circuit 10 can send the output voltage to the storage circuit 30 to record voltage change data, and can record test data such as power-down time retention, and the like, so that a professional can analyze the test data conveniently.
It should be noted that the structures of the input voltage sampling circuit 40 and the output voltage sampling circuit 50 are not limited, and those skilled in the art can refer to the conventional technology in the art, and only the above-mentioned corresponding functions need to be implemented.
Further, the power panel test circuit further includes a temperature sampling circuit 70, an output end of the temperature sampling circuit 70 is connected with the main control circuit, the temperature sampling circuit 70 is configured to detect a temperature of the power panel 100 and output a corresponding temperature signal, and the main control circuit 10 is further configured to receive the temperature signal and determine whether an over-temperature fault occurs in the power panel 100 to be tested according to the temperature signal.
At present, the temperature rise of the test power panel 100 in the TV power industry is mainly realized by using an infrared temperature measuring gun, the price is high, and the temperature change curve cannot be recorded in real time.
In this embodiment, the temperature sampling circuit 70 may include a thermistor, and the temperature of the real-time power board 100 is collected by the thermistor. Because the resistance of the thermistor changes along with the temperature change characteristic, when the temperature changes, the resistance of the thermistor also changes, the current temperature can be calculated to achieve the purpose of collecting voltage by collecting the partial pressure on the thermistor through the main control circuit 10, and the labor can be saved without using a handheld temperature measuring gun for measuring the temperature.
The main control circuit 10 can also record temperature test data in the external storage circuit 30, so that the temperature data can be recorded in real time, and the power failure data is not lost, thereby facilitating the analysis of the temperature characteristics of the power device.
Further, the power panel test circuit further comprises an alarm circuit 60, the alarm circuit 60 is connected with the main control circuit 10, and the main control circuit 10 is further configured to trigger the alarm circuit 60 to alarm when the output voltage signal meets a preset fault voltage range or when the temperature signal reaches a preset over-temperature threshold.
The preset fault voltage range may be outside the normal voltage range, and it is understood that the output voltage has a normal voltage range, such as 12V output, and the output between 11.5V and 12.5V may be considered to be within the normal range according to the actual accuracy requirement, and then the output exceeding 12.5V or lower than 11.5V is considered to be the fault voltage range. In combination with the test power-down requirement, a power-down voltage threshold may also be set, and when the output voltage is lower than the power-down voltage threshold, the main control circuit 10 considers power-down, and can record this and trigger the alarm circuit 60 to alarm, so as to protect the safety of the power panel 100.
The main control circuit 10 is also provided with an over-temperature threshold, when the temperature exceeds the over-temperature threshold, the power panel 100 has a risk of loss, and the main control circuit 10 can record the over-temperature threshold and trigger the alarm circuit 60 to alarm, so that the safety of the power panel 100 is protected.
Further, the power panel test circuit further comprises a display module (not output), the display module is connected with the main control circuit 10, and the main control circuit 10 is further configured to send the obtained test data to the display module for display.
The test data includes the frequency and duration of the power on signal or the power off signal output by the main control circuit 10, the temperature sampling signal received by the main control circuit 10, the output voltage signal, the input voltage signal value, and the like. The display module displays the test data in real time, so that a tester can know the test condition in time. The main control circuit 10 can also draw corresponding statistical diagrams and the like according to the test data, so that more visual display is facilitated.
Further, the power panel test circuit may further include an input module (not shown), where the input module is connected to the main control circuit 10, the input module is configured to receive test instructions such as a test function and a test parameter, and the main control circuit 10 is further configured to execute corresponding test operations according to the test instructions.
Specifically, the test function command may be an on/off control signal output function, an on/off switch test function, an on/off temperature detection function, an on/off output voltage detection function, etc., where each detection function may be turned on simultaneously or turned on separately.
When the control signal output function is started, test parameters such as output time and output time sequence of the control signal can be input specifically, when the switch test function is started, test parameters such as time and frequency of the switch can be input specifically, when the output voltage detection function is started, test parameters such as fault voltage range and the like which influence the output voltage test can be input specifically, and when the temperature detection function is started, test parameters such as over-temperature threshold and the like which influence the temperature test can be input specifically.
The display module and the input module can select a group of interaction screens, so that the display requirement and the input requirement can be met.
Further, the power panel test circuit further includes a wireless communication circuit (not shown), which is connected to the main control circuit 10, and is used for implementing communication connection between the main control circuit 10 and a terminal.
The terminal comprises a mobile phone, a tablet personal computer, a computer and the like. Referring to fig. 4, the wireless communication circuit may include an ESP01-WIFI module U1, and the ESP01 module U1 may communicate with the master circuit 10 through a RX pin and a TX pin through serial ports.
Through setting up wireless communication circuit can be with test data transmission to long-range terminal, operating personnel need not to test the place, can look over data such as temperature, on-off test, power failure in long-range, need not often walk, uses manpower sparingly. And, the operator can also send the test instruction and the test parameter to the main control circuit 10 on the remote terminal to realize remote control test. The testing efficiency is greatly improved.
In summary, based on the above hardware structure, full-function detection such as power on/off test, temperature detection, output voltage detection (including power down detection) of the power panel 100 can be realized, detection data is recorded so as to facilitate analysis of detection, remote operation can be performed, and test efficiency is greatly improved.
The invention also provides a power panel test device, which comprises a power panel test circuit, and the structure of the power panel test circuit can refer to the embodiment and is not repeated herein. It should be noted that, since the power panel test apparatus of the present embodiment adopts the technical scheme of the power panel test circuit described above, the power panel test apparatus has all the beneficial effects of the power panel test circuit described above.
The foregoing description of the invention and the accompanying drawings is only illustrative, and is not intended to limit the scope of the invention, but rather is to be construed in any way in view of the following description, the accompanying drawings and the like.
Claims (8)
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| CN202210422141.7A CN114779112B (en) | 2022-04-21 | 2022-04-21 | Power panel test circuit and power panel test equipment |
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| CN202210422141.7A CN114779112B (en) | 2022-04-21 | 2022-04-21 | Power panel test circuit and power panel test equipment |
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