CN202305101U - Temperature compensation system for pressure sensors - Google Patents
Temperature compensation system for pressure sensors Download PDFInfo
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- CN202305101U CN202305101U CN201120389580XU CN201120389580U CN202305101U CN 202305101 U CN202305101 U CN 202305101U CN 201120389580X U CN201120389580X U CN 201120389580XU CN 201120389580 U CN201120389580 U CN 201120389580U CN 202305101 U CN202305101 U CN 202305101U
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Abstract
The utility model provides a temperature compensation system for pressure sensors. The temperature compensation system comprises a multi-channel sensor test pressure seat, a high/low temperature box, a pressure controller, a multi-channel bridge test module, a programmable power supply, a universal meter and an industrial control computer. According to the temperature compensation system for the pressure sensors, temperature compensation can be performed on a batch of pressure sensors; each sensor can be tested under different temperatures, and a resistance value of a resistor in a bridge of each sensor can be calculated; a compensation resistance network required by each sensor is precisely calculated by the industrial control computer according to a compensation math model; resistors are selected according to calculated data and welded to the bridge to form the compensation resistance network; and therefore, precise temperature compensation for each sensor is finished.
Description
Technical field
The utility model relates to sensor testing system, relates in particular to a kind of pressure sensor temperature bucking-out system.
Background technology
Domestic sensor producer is that employing experience penalty method is carried out temperature Compensation of Pressure Sensor at present mostly; Promptly on all products of same batch, add same compensating resistance; Test again after the compensation; Revise resistance value more repeatedly according to drift value, such temperature-compensated system efficient is low, and precision can not get ensureing.
The utility model content
The utility model provides a kind of pressure sensor temperature bucking-out system, to realize mass, the high precision temperature compensation of pressure transducer.
The utility model provides a kind of pressure sensor temperature bucking-out system, comprising: multiple sensor test pressure seat, a plurality of pressure transducers place said multiple sensor test pressure seat, and each said pressure transducer comprises pressure sensitive unit and electric bridge; High-low temperature chamber, said multiple sensor test pressure seat places said high-low temperature chamber; Pressure controller, it is connected with multiple sensor test pressure seat through pneumatic circuit; Hyperchannel bridge test module, its every passage is connected with each pressure transducer respectively; Programmable power supply, it is connected with each pressure transducer through hyperchannel bridge test module; Multimeter, it is connected with each pressure transducer through hyperchannel bridge test module; Industrial computer, it is connected with said multimeter.
Further; Said electric bridge comprises first resistance, second resistance, the 3rd resistance and the 4th resistance; Said first resistance is connected with said second resistance; Said the 3rd resistance is connected with said the 4th resistance, the 3rd resistance after first resistance after the said series connection and second resistance and said series connection the and the parallel connection of the 4th resistance.
Further; Said electric bridge also comprises first compensating resistance, second compensating resistance, the 3rd compensating resistance, the 4th compensating resistance, the 5th compensating resistance, the 6th compensating resistance and the 7th compensating resistance; One end of said first compensating resistance is connected with the common ends of second resistance with the 3rd resistance; One end of said second compensating resistance is connected with the common ends of second resistance with the 3rd resistance; The other end of said second compensating resistance is connected with the common ends of first resistance with the 4th resistance, and said the 3rd compensating resistance is connected with the common ends of first resistance with the 4th resistance, and an end of said the 6th compensating resistance is connected with an end of second resistance; One end of said the 7th compensating resistance is connected with an end of first resistance; The other end of said the 6th compensating resistance is connected with the other end of the 7th compensating resistance, and said the 4th compensating resistance is parallelly connected with second resistance, and said the 5th compensating resistance is parallelly connected with first resistance.
Compared with prior art, the utlity model has following beneficial effect:
Through said pressure sensor temperature bucking-out system; Can realize temperature Compensation of Pressure Sensor in batches; Under different temperatures, test and calculate the resistance of resistance in its electric bridge respectively to each sensor;, and select resistance welded according to the data that calculate and in electric bridge, form the compensating resistance network through the needed compensating resistance network of every sensor of industrial computer accurate Calculation according to the mathematical model of compensation, the precision temperature of accomplishing every sensor compensates.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described further:
The structural representation of the pressure sensor temperature bucking-out system that Fig. 1 provides for the utility model embodiment.
The structural drawing of the electric bridge in the pressure sensor temperature bucking-out system that Fig. 2 provides for the utility model embodiment before the temperature compensation.
The structural drawing of the electric bridge in the pressure sensor temperature bucking-out system that Fig. 3 provides for the utility model embodiment after the temperature compensation.
In Fig. 1 to Fig. 3,
1: multiple sensor test pressure seat; 2: pressure transducer; 3: high-low temperature chamber; 4: pressure controller; 5: pneumatic circuit; 6: hyperchannel bridge test module; 7: programmable power supply; 8: multimeter; 9: industrial computer; G1: first resistance; G2: second resistance; G3: the 3rd resistance; G4: the 4th resistance; R1: first compensating resistance; R2: second compensating resistance; R3: the 3rd compensating resistance; R4: the 4th compensating resistance; R5: the 5th compensating resistance; R6: the 6th compensating resistance; R7: the 7th compensating resistance; Vi+: reference voltage is anodal; Vi-: reference voltage negative pole; Vo+: output voltage is anodal; Vo-: output voltage negative pole.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the pressure sensor temperature bucking-out system that the utility model proposes is done further explain.According to following explanation and claims, advantage of the utility model and characteristic will be clearer.What need explanation is, accompanying drawing all adopts the form of simplifying very much and all uses non-ratio accurately, only in order to convenient, the purpose of aid illustration the utility model embodiment lucidly.
The core concept of the utility model is; A kind of pressure sensor temperature bucking-out system is provided; Said pressure sensor temperature bucking-out system is placed all pressure transducers of multiple sensor test pressure seat that required datum pressure is provided through pressure controller, through the required environment temperature of high-low temperature chamber design temperature compensation, for each pressure transducer of accepting temperature compensation reference voltage is provided through programmable power supply; Wherein one the tunnel carry out temperature compensation test through hyperchannel bridge test module gating again; Record the primary data of electric bridge in the pressure transducer then through multimeter, after industrial computer calculates, select suitable resistance welded in said electric bridge according to the offset data that draws; Form the compensating resistance network; Through said pressure sensor temperature bucking-out system, can realize high precision, the low-cost temperature compensation of pressure transducer in batches, and the high conformity after the compensation.
The structural representation of the pressure sensor temperature bucking-out system that Fig. 1 provides for the utility model embodiment.As shown in Figure 1, said pressure sensor temperature bucking-out system comprises:
Multiple sensor test pressure seat 1; A plurality of pressure transducers 2 place said multiple sensor test pressure seat 1; Each said pressure transducer 2 comprises pressure sensitive unit and electric bridge, and said multiple sensor test pressure seat 1 provides datum pressure to said a plurality of pressure transducers 2;
High-low temperature chamber 3, said multiple sensor test pressure seat 1 places said high-low temperature chamber 3, and said high-low temperature chamber 3 provides temperature compensation required temperature environment for said a plurality of pressure transducers 2;
Pressure controller 4, it is connected with multiple sensor test pressure seat 1 through pneumatic circuit 5, and said pressure controller 4 is used to control said multiple sensor test pressure seat 1 and offers the required force value of said a plurality of pressure transducer 2 tests;
Hyperchannel bridge test module 6, its every passage is connected with each pressure transducer 2 respectively, and said hyperchannel bridge test module 6 is used for selecting a pressure transducer 2 to test at said a plurality of pressure transducers 2;
Industrial computer 9, it is connected with said multimeter 8, and said multimeter 8 sends said primary data to industrial computer 9, and said industrial computer 9 draws offset data according to said primary data, forms the compensating resistance network of the electric bridge of said pressure transducer 2.
The structural drawing of the electric bridge in the pressure sensor temperature bucking-out system that Fig. 2 provides for the utility model embodiment before the temperature compensation.
Further; As shown in Figure 2; Said electric bridge comprises the first resistance G1, the second resistance G2, the 3rd resistance G3 and the 4th resistance G4; The said first resistance G1 connects with the said second resistance G2, and said the 3rd resistance G3 connects with said the 4th resistance G4, the 3rd resistance G3 after the first resistance G1 after the said series connection and the second resistance G2 and said series connection the and the 4th resistance G4 parallel connection; The structure of this electric bridge can be embodied in the change of pressure in the change of resistance in the electric bridge; Export to convert pressure to voltage, wherein the resistance of the first resistance G1 and the second resistance G2 becomes greatly with the increase of pressure, and the resistance of the second resistance G2 and the 4th resistance G4 reduces with the increase of pressure.
The structural drawing of the electric bridge in the pressure sensor temperature bucking-out system that Fig. 3 provides for the utility model embodiment after the temperature compensation.
Further; As shown in Figure 3; Said compensating resistance network comprises brachium pontis compensating unit and bridge circuit compensating unit; Said brachium pontis compensating unit is used for reducing or increasing the resistance in certain brachium pontis of electric bridge, and said bridge circuit compensating unit is used to reduce or increase the resistance of whole electric bridge, and said bridge circuit compensating unit comprises the first compensating resistance R1, the second compensating resistance R2 and the 3rd compensating resistance R3; Said brachium pontis compensating unit comprises the 4th compensating resistance R4, the 5th compensating resistance R5, the 6th compensating resistance R6 and the 7th compensating resistance R7; The end of the said first compensating resistance R1 is connected with the common ends of the second resistance G2 and the 3rd resistance G3, and the end of the said second compensating resistance R2 is connected with the common ends of the second resistance G2 and the 3rd resistance G3, and the other end of the said second compensating resistance R2 is connected with the common ends of the first resistance G1 and the 4th resistance G4; Said the 3rd compensating resistance R3 is connected with the common ends of the first resistance G1 and the 4th resistance G4; The end of said the 6th compensating resistance R6 is connected with the end of the second resistance G2, and the end of said the 7th compensating resistance R7 is connected with the end of the first resistance G1, and the other end of said the 6th compensating resistance R6 is connected with the other end of the 7th compensating resistance R7; Said the 4th compensating resistance R4 is parallelly connected with the second resistance G2, and said the 5th compensating resistance R5 is parallelly connected with the first resistance G1.
Because said the 4th compensating resistance R4, the 5th compensating resistance R5, the 6th compensating resistance R6 and the 7th compensating resistance R7 are the ohmically of parallel connection or one of them brachium pontis that is connected on electric bridge; Finally can change the balance of electric bridge or the temperature characterisitic of one of them brachium pontis, determine by the 4th compensating resistance R4, the 5th compensating resistance R5, the 6th compensating resistance R6 and the 7th compensating resistance R7 so export the temperature drift at zero point the zero point of pressure transducer 2, because the compensating resistance of parallel connection can change the zero temperature characteristic; So two resistance of the 4th compensating resistance R4 and the 5th compensating resistance R5 only need one simultaneously; If promptly use the 4th compensating resistance R4, then the 5th compensating resistance R5 opens a way, if use the 5th compensating resistance R5; Then the 4th compensating resistance R4 opens a way; The final temperature error balance that guarantees electric bridge, and the compensating resistance of series connection can change the size at zero point, so the 6th compensating resistance R6 and the 7th compensating resistance also are only to need one simultaneously; If promptly use the 6th compensating resistance R6; Then the 7th compensating resistance R7 keeps short circuit, if use the 7th compensating resistance R7, then the 6th compensating resistance R6 keeps short circuit; Because the said first compensating resistance R1, the second compensating resistance R2 and the 3rd compensating resistance R3 are respectively that serial or parallel connection is on the bridge circuit of electric bridge; The resistance of electric bridge increases with temperature and becomes big; So, the full scale output of pressure transducer 2 under different temperatures is consistent when the resistance of the first compensating resistance R1, the second compensating resistance R2 and the 3rd compensating resistance R3 is provided with when suitable.
Following is the temperature compensation test data of accepting a sensor in the pressure transducer 2 of temperature compensation, is respectively at 25 ℃, 65 ℃ of following zero points four resistance of electric bridge during with full scale pressure resistance:
First group of data is that the first resistance G1 is 4278.5 Ω when 25 ℃ of normal temperature and zero pressure, and the second resistance G2 is 4312.0 Ω, and the 3rd resistance G3 is 4325.6 Ω, and the 4th resistance G4 is 4290.2 Ω.
Second group of data is that the first resistance G1 is 4185.7 Ω when 25 ℃ of normal temperature and full pressure, and the second resistance G2 is 4594.4 Ω, and the 3rd resistance G3 is 4572.6 Ω, and the 4th resistance G4 is 4160.3 Ω.
The 3rd group of data are that the first resistance G1 is 4719.1 Ω when 65 ℃ of high temperature and zero pressure, and the second resistance G2 is 4752.5 Ω, and the 3rd resistance G3 is 4776.6 Ω, and the 4th resistance G4 is 4742.9 Ω.
The 4th group of data are that the first resistance G1 is 4623.0 Ω when 65 ℃ of high temperature and full pressure, and the second resistance G2 is 5054.8 Ω, and the 3rd resistance G3 is 5042.0 Ω, and the 4th resistance G4 is 4606.3 Ω.
Above-mentioned data are sent in the industrial computer calculate:
The first compensating resistance R1=1500 Ω, the second compensating resistance R2=18.2K Ω, the 3rd compensating resistance R3=1540 Ω, the 4th compensating resistance R4=1000K Ω, the 5th compensating resistance R5 open circuit, the 6th compensating resistance R6=69.8 Ω, the 7th compensating resistance R7=0.
The data that draw according to aforementioned calculation, with the compensating resistance of respective resistance values be increased to form the compensating resistance network in the electric bridge after, pressure transducer tested drawing:
Under 25 ℃ of normal temperature, the pressure transducer zero pressure is output as 0.3mV, and full scale pressure is output as 100.5mV.
Under 65 ℃ of high temperature, the pressure transducer zero pressure is output as-0.1mV, and full scale pressure is output as 99.8mV.
Can know through the effect temperature compensation of this pressure sensor temperature bucking-out system well by above-mentioned test result, reach normalization and reduced the purpose of temperature error.
In sum; The utility model provides a kind of pressure sensor temperature bucking-out system; Said pressure sensor temperature bucking-out system is placed all pressure transducers of multiple sensor test pressure seat that required datum pressure is provided through pressure controller, through the required environment temperature of high-low temperature chamber design temperature compensation, for each pressure transducer of accepting temperature compensation reference voltage is provided through programmable power supply; Wherein one the tunnel carry out temperature compensation test through hyperchannel bridge test module gating again; Record the primary data of electric bridge in the pressure transducer then through multimeter, after industrial computer calculates, select suitable resistance welded in said electric bridge according to the offset data that draws; Form the compensating resistance network; Through said pressure sensor temperature bucking-out system, can realize high precision, the low-cost temperature compensation of pressure transducer in batches, and the high conformity after the compensation.
Obviously, those skilled in the art can carry out various changes and distortion to the utility model and not break away from the spirit and the scope of the utility model.Like this, belong within the scope of the utility model claim and equivalent technologies thereof if these of the utility model are revised with modification, then the utility model also is intended to comprise these changes and modification interior.
Claims (3)
1. a pressure sensor temperature bucking-out system is characterized in that, comprising:
Multiple sensor test pressure seat, a plurality of pressure transducers place said multiple sensor test pressure seat, and each said pressure transducer comprises pressure sensitive unit and electric bridge;
High-low temperature chamber, said multiple sensor test pressure seat places said high-low temperature chamber;
Pressure controller, it is connected with multiple sensor test pressure seat through pneumatic circuit;
Hyperchannel bridge test module, its every passage is connected with each pressure transducer respectively;
Programmable power supply, it is connected with each pressure transducer through hyperchannel bridge test module;
Multimeter, it is connected with each pressure transducer through hyperchannel bridge test module;
Industrial computer, it is connected with said multimeter.
2. pressure sensor temperature bucking-out system according to claim 1; It is characterized in that; Said electric bridge comprises first resistance, second resistance, the 3rd resistance and the 4th resistance; Said first resistance is connected with said second resistance, and said the 3rd resistance is connected with said the 4th resistance, the 3rd resistance after first resistance after the said series connection and second resistance and said series connection the and the parallel connection of the 4th resistance.
3. according to the said pressure sensor temperature bucking-out system of claim 2; It is characterized in that; Said electric bridge also comprises first compensating resistance, second compensating resistance, the 3rd compensating resistance, the 4th compensating resistance, the 5th compensating resistance, the 6th compensating resistance and the 7th compensating resistance; One end of said first compensating resistance is connected with the common ends of second resistance with the 3rd resistance, and an end of said second compensating resistance is connected with the common ends of second resistance with the 3rd resistance, and the other end of said second compensating resistance is connected with the common ends of first resistance with the 4th resistance; Said the 3rd compensating resistance is connected with the common ends of first resistance with the 4th resistance; One end of said the 6th compensating resistance is connected with an end of second resistance, and an end of said the 7th compensating resistance is connected with an end of first resistance, and the other end of said the 6th compensating resistance is connected with the other end of the 7th compensating resistance; Said the 4th compensating resistance is parallelly connected with second resistance, and said the 5th compensating resistance is parallelly connected with first resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120389580XU CN202305101U (en) | 2011-10-13 | 2011-10-13 | Temperature compensation system for pressure sensors |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201120389580XU CN202305101U (en) | 2011-10-13 | 2011-10-13 | Temperature compensation system for pressure sensors |
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| CN202305101U true CN202305101U (en) | 2012-07-04 |
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| CN201120389580XU Expired - Lifetime CN202305101U (en) | 2011-10-13 | 2011-10-13 | Temperature compensation system for pressure sensors |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106908197A (en) * | 2017-03-02 | 2017-06-30 | 成都信息工程大学 | Bearing calibration is demarcated in a kind of pressure gauge temperature drift |
| CN107131996A (en) * | 2016-02-29 | 2017-09-05 | 阿自倍尔株式会社 | Pressure sensor condition detection method and system |
| CN107588890A (en) * | 2017-09-08 | 2018-01-16 | 武汉中航传感技术有限责任公司 | Pressure sensor test system |
| CN107655616A (en) * | 2017-09-13 | 2018-02-02 | 武汉中航传感技术有限责任公司 | The temperature compensation system and method for a kind of differential pressure pick-up |
| CN112414594A (en) * | 2020-11-09 | 2021-02-26 | 中国电子科技集团公司第四十九研究所 | Temperature error correction method for silicon piezoresistive pressure sensor |
-
2011
- 2011-10-13 CN CN201120389580XU patent/CN202305101U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131996A (en) * | 2016-02-29 | 2017-09-05 | 阿自倍尔株式会社 | Pressure sensor condition detection method and system |
| CN106908197A (en) * | 2017-03-02 | 2017-06-30 | 成都信息工程大学 | Bearing calibration is demarcated in a kind of pressure gauge temperature drift |
| CN106908197B (en) * | 2017-03-02 | 2019-03-15 | 成都信息工程大学 | A kind of pressure gauge temperature drift calibration bearing calibration |
| CN107588890A (en) * | 2017-09-08 | 2018-01-16 | 武汉中航传感技术有限责任公司 | Pressure sensor test system |
| CN107655616A (en) * | 2017-09-13 | 2018-02-02 | 武汉中航传感技术有限责任公司 | The temperature compensation system and method for a kind of differential pressure pick-up |
| CN112414594A (en) * | 2020-11-09 | 2021-02-26 | 中国电子科技集团公司第四十九研究所 | Temperature error correction method for silicon piezoresistive pressure sensor |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CAI XINMEI Free format text: FORMER OWNER: JIANGSU ENTECH SENSOR CO., LTD. Effective date: 20140213 |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140213 Address after: 224051 Salt Lake highway 52, Ting Hu District, Jiangsu, Yancheng City Patentee after: Jia Qingfeng Address before: 224051 Salt Lake highway 18, Ting Hu District, Jiangsu, Yancheng City Patentee before: Jiangsu Entech Sensor Co., Ltd. |
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| ASS | Succession or assignment of patent right |
Owner name: JIANGSU ENTECH SENSOR CO., LTD. Free format text: FORMER OWNER: JIA QINGFENG Effective date: 20150722 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150722 Address after: 214400, No. 66 Hua Dong Road, Chengjiang street, Jiangyin, Jiangsu Patentee after: JIANGYIN MAXONIC ENTECH SENSOR CO., LTD. Address before: 224051 Salt Lake highway 52, Ting Hu District, Jiangsu, Yancheng City Patentee before: Jia Qingfeng |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |