CN1069700A - Portable automobile electronic scale - Google Patents
Portable automobile electronic scale Download PDFInfo
- Publication number
- CN1069700A CN1069700A CN 91108505 CN91108505A CN1069700A CN 1069700 A CN1069700 A CN 1069700A CN 91108505 CN91108505 CN 91108505 CN 91108505 A CN91108505 A CN 91108505A CN 1069700 A CN1069700 A CN 1069700A
- Authority
- CN
- China
- Prior art keywords
- circuit
- resistance
- voltage
- amplifying
- weighing apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005303 weighing Methods 0.000 claims abstract description 11
- 239000003990 capacitor Substances 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000005484 gravity Effects 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 3
- 101150006573 PAN1 gene Proteins 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention discloses a kind of portable automobile electronic scale, it is by the scale body, sensor on the scale body and the metering circuit that is connected with sensor and digital display circuit are formed, it has overcome the irremovable shortcoming of automobile ground weigher, make whole electronics weighing apparatus to carry easily, and weighing vehicle and other big weight of heavy at any time.
Description
The invention relates to the weighing apparatus that application can produce the feature of elastically-deformable element, in particular for the electronics weighing apparatus of the belt sensor of automobile or other weights.
The weighing of vehicle or other weights both at home and abroad at present, mostly adopt fixing or machinery or electronics ground weigher, though the also employing portable vehicle electronics that has weighing apparatus is as the portable electronic scale of Chinese patent 88217204.2 alternative ground weighers, though can reach light purpose, but because strain-gauge is directly sticked on the spoke or elastic element of shearing, therefore very high to material requirements, the manufacturing process complexity, and when the strain-gauge output sensitivity is inconsistent, can't compensate on the circuit, so precision is not high.
Because it is inconsistent that the sensor volume carries output sensitivity, domestic existing electronic scales adopts the sensor string linked method usually, and this will increase power supply, makes the circuit complexity.External sensor and the linked method of adopting, this requires the volume of sensor to carry the output sensitivity conformability will get well the inevitable complexity of its anufacturability more.
The purpose of the invention is, the circuit that a kind of high-precision electronics add circuit is provided and exchanges, direct supply convert the required power supply of many groups to make the survey precision height, and the simple cost of circuit is low.
The technical scheme that the invention is adopted is: it is by the scale pan, sensor, and scale body and measuring circuit, digital display circuit and power circuit are formed.It is that the gravity from the scale pan is passed to the sensor that four angles of the scale pan link, sensor gravitate output ultra-weak electronic signal is given the different proportion add circuit that links with it, by the different proportion add circuit, synthesize one road electric signal, this road electric signal passes through the ratio amplifying circuit again, and zeroing circuit finally outputs on the digital display meter to demonstrate alleged weight.The power circuit of the invention has simultaneously also used interchange or direct supply to convert the power source conversion circuit of the required power supply of many groups to, and voltage transformer B is as AC transformer when using source of AC; And voltage transformer B uses as contravariant transformer when using direct supply.
The advantage of the invention is: because it is simple in structure in light weight, so it can substitute fixed type or mechanical type or electronic type ground weigher, make to be easy to carry, and measuring vehicle and other big weight of heavy easily.
Fig. 1 is the portable automobile electronic scale circuit block diagram
Fig. 2 is a portable automobile electronic scale scale stereogram
Fig. 3 is the A-A section-drawing of Fig. 2
Fig. 4 is portable automobile electronic scale metering circuit figure
Fig. 5 is the portable automobile electronic scale power circuit diagram
Be a specific embodiment of the invention below, be circuit block diagram as shown in Figure 1, it shows the electric signal that transmitted by sensor by the different proportion add circuit, finally is input to after ratio amplifying circuit and the zeroing circuit to demonstrate institute on the digital display circuit and weigh.Its power supply is provided by power circuit.
Figure 3 shows that the view of scale body as Fig. 2, it is made up of bonded assembly sensor 2 under the scale pan 1 and scale base 3 and four angles of the scale pan, when the weighing weight, because the scale pan 1 gravitate makes sensor 2 distortion, exports four road ultra-weak electronic signal v
I1, v
I2, v
I3, v
I4, by the resistance R in the circuit diagram shown in Figure 4
* 1, R
* 2, R
* 3, R
* 4, output to and its bonded assembly capacitor C
2Resistance R
10And high precision operating amplifier IC
1, and with high precision operating amplifier IC
1The bonded assembly resistance R
9Go up (by R
* 1, R
* 2, R
* 3, R
* 4, C
2, R
10, IC
1And R
9The circuit that constitutes is called the different proportion add circuit), export one road electric signal v through this circuit
01, enter R
11, and then import the capacitor C that is attached thereto
3, resistance R
13, high-precision amplifying IC
2And with high-precision amplifying IC
2The resistance R that is connected
12Go up (by R
11, C
3, R
13, IC
2And R
12The circuit that constitutes is called the ratio amplifying circuit), and output v
02To digital display meter, weighed to demonstrate.High-precision amplifying IC at above-mentioned circuit
2Positive input be connected with current-limiting resistance R
14With adjustable resistance W
5The zeroing circuit that constitutes makes it by changing adjustable resistance W
5The resistance size, reach the purpose of adjusting initial voltage.
The invention simultaneously also uses power circuit as shown in Figure 5 to provide power supply for each circuit of this instrument.It is by voltage transformer B, triode D
1Inversion pushing block IC
3, resistance R
19, R
20, triode Q
1, Q
2And K switch is formed. Beat 1,2 end closures when exchanging shelves when K switch, 3,4 ends disconnect at this moment, and input ac voltage 220V d-c component does not have input, by voltage transformer B coupling, make it to export the negative terminal voltage v of required voltage transformer B
1, v
2, v
3, v
4, provide complete machine respectively to organize the required power supply of instrument.When K beat at zero frequency span, 1,2 disconnected, 3,4 closures, and import the 12V vdc this moment, at first is input to the diode D that prevents the power supply reversal connection
1, just be input to then and diode D
1The inversion pushing block IC that joins
3, by inversion pushing block IC
3On mouth K
1, K
2, the output AC signal, respectively by with K
1End bonded assembly resistance R
19, triode Q
1And and K
2End bonded assembly resistance R
20, triode Q
2, make winding m
1, m
2Export positive half cycle and negative half-cycle current respectively, then the negative terminal of voltage transformer B induces required voltage v
1, v
2, v
3, v
4
In the specific embodiment that foregoing invention is created, each parameter in the circuit can be chosen following numerical value:
IC
1, IC
2Be high precision operating amplifier OP-07, R
* 1, R
* 2, R
* 3, R
* 4Resistance is about 15K Ω, R
12, R
93.3K Ω, R
1030K Ω, R
1030K Ω, R
113K Ω, R
1362K Ω, R
1420K Ω, W
5Be potential device 200K Ω, C
2, C
3 Electric capacity 1 μ, IC
3Be inversion pushing block UPK2436, D
1Be diode IN4002, R
19, R
20510 Ω, Q
1, Q
2Crystal triode DD01D.
Claims (5)
1, portable automobile electronic scale, it is by the scale pan gravity to be passed to sensor, make sensor output electric signal, and by on digital display meter, demonstrating alleged weight after the metering circuit, it is characterized in that: metering circuit is by the different proportion add circuit, ratio amplifying circuit and zeroing circuit are formed, and sensor is to be connected with the different proportion add circuit earlier, the different proportion add circuit is connected with the ratio amplifying circuit then, on the ratio amplifying circuit, also be connected to simultaneously zeroing circuit, and last passing ratio amplifying circuit is connected with the digital display circuit, demonstrating institute weighs, the power circuit of the invention has also used AC transformer and dc inversion voltage transformer in addition, in order to provide each circuit required power supply.
2, electronics weighing apparatus according to claim 1, it is characterized in that: the different proportion add circuit is by resistance R
* 1, R
* 2, R
* 3, R
* 4While and capacitor C
2, resistance R
10And high precision operating amplifier IC
1Be connected, and high precision operating amplifier IC
1With R
9Be connected and formed.
3, electronics according to claim 1 weighing apparatus is characterized in that: the ratio amplifying circuit be by and resistance R
11The capacitor C that is connected
3, resistance R
13, high-precision amplifying IC
2, and with high-precision amplifying IC
2The resistance R that is connected
12Formed.
4, electronics weighing apparatus according to claim 1, it is characterized in that: zeroing circuit is by being connected in high-precision amplifying IC
2With resistance R
12Between resistance R
14And and resistance R
14The adjustable resistance W that is connected
5Formed.
5, electronics weighing apparatus according to claim 1, it is characterized in that: AC transformer of using in the power circuit and dc inversion voltage transformer are when alternating-current voltage/AC voltage is imported, be directly to export required voltage by voltage transformer B coupling back, when vdc was imported, it was earlier through diode D
1, be passed to then and diode D
1Bonded assembly inversion pushing block IC
3, again by inversion pushing block IC
3On mouth K
1With resistance R
19, triode Q
1, and another mouth K
2With resistance R
20, triode Q
2Be connected and connect thereafter winding m respectively
1, m
2, export required voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91108505 CN1069700A (en) | 1991-08-24 | 1991-08-24 | Portable automobile electronic scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91108505 CN1069700A (en) | 1991-08-24 | 1991-08-24 | Portable automobile electronic scale |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1069700A true CN1069700A (en) | 1993-03-10 |
Family
ID=4909320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91108505 Pending CN1069700A (en) | 1991-08-24 | 1991-08-24 | Portable automobile electronic scale |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1069700A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011031246A1 (en) | 2009-09-08 | 2011-03-17 | Tekce Ferdi | Electronic vehicle scale |
| CN103419704A (en) * | 2012-05-25 | 2013-12-04 | 昆达电脑科技(昆山)有限公司 | Vehicular self-measuring electronic scale |
-
1991
- 1991-08-24 CN CN 91108505 patent/CN1069700A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011031246A1 (en) | 2009-09-08 | 2011-03-17 | Tekce Ferdi | Electronic vehicle scale |
| CN103419704A (en) * | 2012-05-25 | 2013-12-04 | 昆达电脑科技(昆山)有限公司 | Vehicular self-measuring electronic scale |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |