CN2230923Y - Gas pressure difference meter - Google Patents
Gas pressure difference meter Download PDFInfo
- Publication number
- CN2230923Y CN2230923Y CN 94247115 CN94247115U CN2230923Y CN 2230923 Y CN2230923 Y CN 2230923Y CN 94247115 CN94247115 CN 94247115 CN 94247115 U CN94247115 U CN 94247115U CN 2230923 Y CN2230923 Y CN 2230923Y
- Authority
- CN
- China
- Prior art keywords
- pressure
- sensor
- gas valve
- electromagnetic gas
- absolute pressure
- 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.)
- Expired - Fee Related
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to a testing instrument for the pressure difference of gas, comprising a casing, an electromagnetic gas valve, absolute pressure sensors and an internal circuit for the post treatment of a signal sensor, wherein, the electromagnetic gas valve, the absolute pressure sensors and the internal circuit connected with the absolute pressure are positioned in the casing. The testing instrument comprises two absolute pressure sensors used for simultaneously collecting the pressure signals of two points measured; the sensor A is connected with the pressure entrances A, B of the two points measured via an electromagnetic gas valve; the sensor B is directly connected with the pressure entrance B. The testing instrument can simultaneously and continuously collect the pressure signals of the two points measured, can continuously display the pressure difference of the two points measured, and can automatically carry out error compensation. The utility model has high measuring precision, increasing the using range of the product of the utility model.
Description
The utility model relates to a kind of gas differential pressure tester, is specially a kind of gas differential pressure tester that can gather tested two point pressures simultaneously and can carry out error compensation automatically.
Existing gas differential pressure tester, as 93202646.X a case disclosed " optics watt phase detecting device tester ", comprise electromagnetic gas valve, sensor, the internal circuit of the signal subsequent treatment that links to each other with sensor, internal circuit comprises signal conversion interface circuit, CPU, memory, display circuit, keyboard interface circuit and the electromagnetic gas valve driving circuit of controlling by CPU, existing gas differential pressure tester only contains single absolute pressure sensor, this sensor through electromagnetic gas valve with gone into to link to each other by the pressure of two measuring points, electromagnetic gas valve is under the control of CPU, sensor is communicated with the pressure entrance of two measured points respectively, sensor is experienced the pressure of two measured points respectively like this, and this pressure signal is through the final differential pressure that shows two measured points of subsequent treatment.Because existing gas differential pressure tester is to gather tested pressure signal respectively at 2, pressure as the measured point is instance variable, and the pressure reduction of its demonstration often can not reflect actual value, and because its above-mentioned design feature, determine it not show continuous monitoring continuously to tested pressure reduction.
The purpose of this utility model is for providing a kind of gas differential pressure tester that can gather tested two point pressure signals continuously, simultaneously and can carry out error compensation automatically.
The utility model is to adopt following measure to realize: this gas differential pressure tester, comprise housing, be positioned at the electromagnetic gas valve of housing, absolute pressure sensor with link to each other with absolute pressure sensor by signal conversion interface circuit, central processing unit, data memory, memory under program, display circuit, the keystroke interface circuit reaches the internal circuit of the signal subsequent treatment of being made up of the electromagnetic gas valve driving circuit of CPU control, this gas differential pressure tester comprises two absolute pressure sensor A, B, be used for gathering simultaneously tested pressure signal at 2, sensors A is through electromagnetic gas valve and tested 2 pressure entrance A, B links to each other, and sensor B directly communicates with pressure entrance B.This gas differential pressure tester is owing to there are two pressure transducers, and under the proper testing situation, electromagnetic gas valve communicates for 1,2 mouthfuls, therefore, can be simultaneously, gather tested pressure signal at 2 continuously, can show continuously tested 2 pressure reduction.
The utility model is compared with prior art can be simultaneously, and the pressure signal that continuous acquisition is tested 2 can show tested differential pressure continuously at 2, and can carry out error compensation automatically, has higher measuring accuracy, has improved the usable range of product.
Accompanying drawing 1 is the utility model housing outside drawing;
Accompanying drawing 2 is the rear view of Fig. 1;
Accompanying drawing 3 is the internal circuit configuration signal.
In conjunction with the accompanying drawings the utility model is further described as follows: this gas differential pressure tester comprises housing, be positioned at the electromagnetic gas valve of housing, absolute pressure sensor with link to each other with absolute pressure sensor by signal conversion interface circuit, central processing unit, data memory, memory under program, display circuit, the keystroke interface circuit reaches the internal circuit of the signal subsequent treatment of being made up of the electromagnetic gas valve driving circuit of CPU control, this gas differential pressure tester comprises two absolute pressure sensor A, B, be used for gathering simultaneously tested pressure signal at 2, sensors A is through electromagnetic gas valve and tested 2 pressure entrance A, B links to each other, and sensor B directly communicates with pressure entrance B.Input keyboard is used to carry out different keypad function programs, as shows the not differential pressure value of commensurate, and the apparatus guarantee personnel show the parameter that some are specific etc. when maintenance.Two pressure transducers are set, and the error of himself (drift error and the systematic error that comprise sensor) must be given consideration, otherwise, the measuring accuracy of meeting lowering apparatus.Under the ideal state of factors such as the sluggishness of not considering sensing itself, random disturbance error, P
A=P
A shows+ P
The A mistake, P
B=P
B shows+ PB mistake, P
A, P
BBe tested actual pressure value, P at 2
A shows, P
B showsFor showing force value, P
The A mistake, P
The B mistakeBe A, B sensor errors value (comprising drift error and systematic error), pressure reduction △ P=P
A-P
B=(P
A shows-P
B shows)+(P
The A mistake-P
The B mistake), P so
The A mistake-PB mistake is exactly the offset of pressure reduction.Before carrying out actual test, can press the compensation key, the conducting of CPU control electromagnetic gas valve driving circuit makes 1,2 mouthful obstructed 2,3 mouthfuls of electromagnetic gas valve to communicate, at this moment, sensors A, B impression be same pressure signal, so △ P is zero, offset P
The A mistake-P
The B mistake=P
B shows-P
A shows, this offset is stored, when pending reality was tested, the signal subsequent process circuit compensated automatically to the pressure reduction that records, and has improved the measuring accuracy of pressure reduction so widely.Because the drift error of sensor self is the function of time, therefore, should carry out single compensation every a period of time.During use, should at first press the error compensation key and compensate, and then carry out actual pressure reduction test.Gas differential pressure tester overall dimensions described in the utility model: 300 * 200 * 250mm, weight 2kg.
Claims (1)
1, a kind of gas differential pressure tester, comprise housing, be positioned at the electromagnetic gas valve of housing, absolute pressure sensor with link to each other with absolute pressure sensor by signal conversion interface circuit, central processing unit, data memory, memory under program, display circuit, the keystroke interface circuit reaches the internal circuit of the signal subsequent treatment of being made up of the electromagnetic gas valve driving circuit of CPU control, it is characterized by: this gas differential pressure tester comprises two absolute pressure sensor A, B, be used for gathering simultaneously tested pressure signal at 2, sensors A is through electromagnetic gas valve and tested 2 pressure entrance A, B links to each other, and sensor B directly communicates with pressure entrance B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94247115 CN2230923Y (en) | 1994-12-03 | 1994-12-03 | Gas pressure difference meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94247115 CN2230923Y (en) | 1994-12-03 | 1994-12-03 | Gas pressure difference meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2230923Y true CN2230923Y (en) | 1996-07-10 |
Family
ID=33852425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94247115 Expired - Fee Related CN2230923Y (en) | 1994-12-03 | 1994-12-03 | Gas pressure difference meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2230923Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139933B (en) * | 2006-09-06 | 2010-08-11 | 郑州市光力科技发展有限公司 | Mining gas discharging multi-parameter measuring instrument having negative pressure compensating function |
| CN103674410A (en) * | 2012-09-26 | 2014-03-26 | 中国科学院光电研究院 | Differential pressure measuring device and method |
| CN104848984A (en) * | 2015-06-08 | 2015-08-19 | 中国建筑科学研究院 | Instrument and method for continuously testing air pressure difference between inside and outside of building |
| CN106353030A (en) * | 2015-07-24 | 2017-01-25 | 常州市汇丰船舶附件制造有限公司 | Reference atmospheric pressure based micro-overpressure detection method and detection device |
| CN109141616A (en) * | 2018-07-26 | 2019-01-04 | 耿靓 | A kind of distribution pressure difference measurement sensor and method |
-
1994
- 1994-12-03 CN CN 94247115 patent/CN2230923Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139933B (en) * | 2006-09-06 | 2010-08-11 | 郑州市光力科技发展有限公司 | Mining gas discharging multi-parameter measuring instrument having negative pressure compensating function |
| CN103674410A (en) * | 2012-09-26 | 2014-03-26 | 中国科学院光电研究院 | Differential pressure measuring device and method |
| CN103674410B (en) * | 2012-09-26 | 2016-10-12 | 中国科学院光电研究院 | Differential pressure measurement device and method |
| CN104848984A (en) * | 2015-06-08 | 2015-08-19 | 中国建筑科学研究院 | Instrument and method for continuously testing air pressure difference between inside and outside of building |
| CN106353030A (en) * | 2015-07-24 | 2017-01-25 | 常州市汇丰船舶附件制造有限公司 | Reference atmospheric pressure based micro-overpressure detection method and detection device |
| CN106353030B (en) * | 2015-07-24 | 2022-04-19 | 常州市汇丰船舶附件制造有限公司 | Atmospheric reference pressure-based micro-overpressure detection method and detection device thereof |
| CN109141616A (en) * | 2018-07-26 | 2019-01-04 | 耿靓 | A kind of distribution pressure difference measurement sensor and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |