CN204461596U - A kind of electronic scale automatic calibration system - Google Patents
A kind of electronic scale automatic calibration system Download PDFInfo
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- CN204461596U CN204461596U CN201520183986.0U CN201520183986U CN204461596U CN 204461596 U CN204461596 U CN 204461596U CN 201520183986 U CN201520183986 U CN 201520183986U CN 204461596 U CN204461596 U CN 204461596U
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Abstract
The utility model provides a kind of electronic scale automatic calibration system, mainly comprise stationary platform, pan of a steelyard, lifting jack is provided with between stationary platform and pan of a steelyard, pressure transducer is arranged between the piston rod top of lifting jack and stationary platform, hydraulic control system connects the joint of lifting jack, pressure transducer output terminal connects caliberating device, caliberating device comprises touch display screen, caliberating device built-in control circuit plate, control circuit board comprises control module, fingerprint input part, authentication ' unit, display unit and data acquisition unit, data acquisition unit includes controller, pressure sensor unit and authentication unit, the utility model structural design is simple, achieve the automatic Calibration of weighing system, effectively prevent illegal demarcation simultaneously, the pressure sensor systems adopted improves demarcation speed and stated accuracy.
Description
Technical field:
The utility model relates to demarcation field, particularly relates to a kind of electronic scale automatic calibration system.
Background technology:
Electronic scales utilizes sensor measurement principle, it is that the elastic beam distortion of the pressure of outside by sensor is made it to paste superincumbent foil gauge generation change in resistance, under the effect of driving voltage, export the electric signal of the simulation be directly proportional to measured object, and send analog to digital conversion circuit to.The AD circuit of electronic scale, it carries out the simulating signal that sensor is sent here to modulate, amplify, filtering, sampling, integration, the efficient digital signal of stable output, gives control module, control inner working routine by display unit by control module, demonstrate measured object gravimetric value.
Existing electronic scale calibration system, though there is certain confidentiality, such as input password and change nominal data, but still there is certain leak, password is easily cracked by network of maintenance and repair or changes nominal data without authorization, thus causes the thing of giving short weight often to occur.Existing pressure sensor systems calibration process is very complicated, consuming time longer.And add extra circuit components due to whole system, cause pressure calibration process slow, stated accuracy is not high, makes whole pressure sensor systems with high costs simultaneously.
Utility model content:
In order to solve the problem, it is simple that the utility model provides a kind of structural design, can achieve the automatic Calibration of weighing system, effectively prevents illegal demarcation simultaneously, and can improve the technical scheme of demarcation speed and precision:
A kind of electronic scale automatic calibration system, mainly comprise stationary platform, pan of a steelyard, lifting jack is provided with between stationary platform and pan of a steelyard, pressure transducer is arranged between the piston rod top of lifting jack and stationary platform, hydraulic control system connects the joint of lifting jack, pressure transducer output terminal connects caliberating device, caliberating device comprises touch display screen, caliberating device built-in control circuit plate, control circuit board comprises control module, fingerprint input part, authentication ' unit, display unit and data acquisition unit, data acquisition unit includes controller, pressure sensor unit and authentication unit.
As preferably, control module connects fingerprint input part, authentication ' unit, display unit respectively, and controller is Bonding pressure sensor unit and authentication unit respectively, authentication ' unit connectivity verification unit.
As preferably, pressure sensor unit comprises instrument amplifier, analog to digital converter, single-chip core, first instrument amplifier is connected with negative input end, the first biased electrical pressure side with the positive input terminal of pressure transducer, second instrument amplifier is connected with the second biased electrical pressure side with first instrument amplifier respectively, analog to digital converter is connected with second instrument amplifier with first instrument amplifier respectively, and single-chip core is connected with analog to digital converter.
As preferably, first instrument amplifier, second instrument amplifier, analog to digital converter and single-chip core are on a single die integrated.
The beneficial effects of the utility model are:
(1) pressure sensor systems of the utility model employing, regulates its each instrument amplifier, does not need the peripheral potentiometer that magnitude setting is various, simplify and accelerate system calibrating process and the stated accuracy of pressure transducer.
(2) the utility model increases fingerprint load module in caliberating device, when changing demarcation yardstick, demarcation yardstick can only be changed by fingerprint authentication by the personnel of professional or metrological supervision department, electronic scale cannot complete calibrating procedure alone, add the safety and reliability of demarcation, effectively prevent illegal demarcation.
Accompanying drawing illustrates:
Fig. 1 is Integral connection structure figure of the present utility model;
Fig. 2 is caliberating device syndeton block diagram of the present utility model;
Fig. 3 is sensor unit circuitry schematic diagram of the present utility model.
Embodiment:
For making goal of the invention of the present utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
As shown in Figure 1-2, a kind of electronic scale automatic calibration system, mainly comprise stationary platform 1, pan of a steelyard 2, lifting jack 3 is provided with between stationary platform 1 and pan of a steelyard 2, pressure transducer 4 is arranged between piston rod 5 top of lifting jack 3 and stationary platform 1, hydraulic control system 6 connects the joint 31 of lifting jack 3, pressure transducer 4 output terminal connects caliberating device 7, caliberating device 7 comprises touch display screen 71, caliberating device 7 built-in control circuit plate 72, control circuit board 72 comprises control module 721, fingerprint input part 722, authentication ' unit 723, display unit 724 and data acquisition unit 73, control module 721 connects fingerprint input part 722 respectively, authentication ' unit 723, display unit 724, data acquisition unit 73 includes controller 731, pressure sensor unit 732 and authentication unit 733, controller 731 is Bonding pressure sensor unit 732 and authentication unit 733 respectively, authentication ' unit 723 connectivity verification unit 733.
When electronic scale starts to demarcate operation, install this device, primer fluid pressure control system 6 makes lifting jack 3 synchronization action apply uniform load to pan of a steelyard 2, this load passes through sensor 4 by Signal transmissions in caliberating device 7, and data acquisition unit 73 provides calibration value by after the signal-data processing comparison of pressure transducer 4.To change calibration value, touch display screen 71 is clicked fingerprint input part 722 and enters change interface, if fingerprint input is correct, then calibration value can be changed, if fingerprint input error, then exit calibration interface automatically, caliberating device makes 7 to have legal identity with personnel, then can enter the calibrating procedure to electronic scale, identity is defective, can not demarcate.The utility model increases fingerprint load module in caliberating device, when changing demarcation yardstick, demarcation yardstick can only be changed by fingerprint authentication by the personnel of professional or metrological supervision department, electronic scale cannot complete calibrating procedure alone, add the safety and reliability of demarcation, effectively prevent illegal demarcation.
As shown in Figure 3, pressure sensor unit 732 comprises instrument amplifier, analog to digital converter, single-chip core, first instrument amplifier 8 is connected with negative input end, the first biased electrical pressure side U0 with the positive input terminal of pressure transducer 4 respectively, and first instrument amplifier 8 is for amplifying the difference value of positive input and negative input; Second instrument amplifier 9 is connected with the second biased electrical pressure side U1 with first instrument amplifier 8 respectively, and second instrument amplifier 9 is for amplifying the output valve of first instrument amplifier 8 further; Analog to digital converter 10 is connected with second instrument amplifier 9 with first instrument amplifier 8 respectively, and analog to digital converter 10 is for being converted to digital signal by the output signal of first instrument amplifier 28 and second instrument amplifier 9; Single-chip core 11 is connected with analog to digital converter 10, and single-chip core 11, for controlling whole calibration circuit of pressure sensor system, carries out corresponding data operation, process or interruption.First instrument amplifier 8, second instrument amplifier 9, analog to digital converter 10 and single-chip core 11 are on a single die integrated.The pressure sensor systems that the utility model adopts, regulates its each instrument amplifier, does not need the peripheral potentiometer that magnitude setting is various, simplify and accelerate system calibrating process and the stated accuracy of pressure transducer.
Above-described embodiment is preferred embodiment of the present utility model; it is not the restriction to technical solutions of the utility model; as long as without the technical scheme that creative work can realize on the basis of above-described embodiment, all should be considered as falling within the scope of the rights protection of the utility model patent.
Claims (4)
1. an electronic scale automatic calibration system, mainly comprise stationary platform (1), pan of a steelyard (2), it is characterized in that: between described stationary platform (1) and described pan of a steelyard (2), be provided with lifting jack (3), pressure transducer (4) is arranged between piston rod (5) top of described lifting jack (3) and described stationary platform (1), hydraulic control system (6) connects the joint (31) of described lifting jack (3), described pressure transducer (4) output terminal connects caliberating device (7), described caliberating device (7) comprises touch display screen (71), described caliberating device (7) built-in control circuit plate (72), described control circuit board (72) comprises control module (721), fingerprint input part (722), authentication ' unit (723), display unit (724) and data acquisition unit (73), described data acquisition unit (73) includes controller (731), pressure sensor unit (732) and authentication unit (733).
2. a kind of electronic scale automatic calibration system according to claim 1, it is characterized in that: described control module (721) connects described fingerprint input part (722), described authentication ' unit (723), described display unit (724) respectively, described controller (731) connects described pressure sensor unit (732) and described authentication unit (733) respectively, and described authentication ' unit (723) connects described authentication unit (733).
3. a kind of electronic scale automatic calibration system according to claim 1, it is characterized in that: described pressure sensor unit (732) comprises instrument amplifier, analog to digital converter, single-chip core, first instrument amplifier (8) respectively with positive input terminal and the negative input end of described pressure transducer (4), first biased electrical pressure side (U0) is connected, second instrument amplifier (9) is connected with the second biased electrical pressure side (U1) with described first instrument amplifier (8) respectively, described analog to digital converter (10) is connected with described second instrument amplifier (9) with described first instrument amplifier (8) respectively, described single-chip core (11) is connected with described analog to digital converter (10).
4. a kind of electronic scale automatic calibration system according to claim 3, is characterized in that: described first instrument amplifier (8), described second instrument amplifier (9), described analog to digital converter (10) and described single-chip core (11) are on a single die integrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520183986.0U CN204461596U (en) | 2015-03-23 | 2015-03-23 | A kind of electronic scale automatic calibration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520183986.0U CN204461596U (en) | 2015-03-23 | 2015-03-23 | A kind of electronic scale automatic calibration system |
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| Publication Number | Publication Date |
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| CN204461596U true CN204461596U (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520183986.0U Expired - Fee Related CN204461596U (en) | 2015-03-23 | 2015-03-23 | A kind of electronic scale automatic calibration system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907201A (en) * | 2017-10-30 | 2018-04-13 | 北京航天计量测试技术研究所 | A kind of electronic scale automatic Proofreading device |
| CN109668616A (en) * | 2018-11-06 | 2019-04-23 | 杭州钱江称重技术有限公司 | One kind is automatically without weight calibrating device |
-
2015
- 2015-03-23 CN CN201520183986.0U patent/CN204461596U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907201A (en) * | 2017-10-30 | 2018-04-13 | 北京航天计量测试技术研究所 | A kind of electronic scale automatic Proofreading device |
| CN109668616A (en) * | 2018-11-06 | 2019-04-23 | 杭州钱江称重技术有限公司 | One kind is automatically without weight calibrating device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20160323 |
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| CF01 | Termination of patent right due to non-payment of annual fee |