CN104776953A - Detection method of fluid medium pressure difference value - Google Patents
Detection method of fluid medium pressure difference value Download PDFInfo
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- CN104776953A CN104776953A CN201510176052.9A CN201510176052A CN104776953A CN 104776953 A CN104776953 A CN 104776953A CN 201510176052 A CN201510176052 A CN 201510176052A CN 104776953 A CN104776953 A CN 104776953A
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Abstract
The invention discloses a detection method of a fluid medium pressure difference value, and relates to a pressure difference detection system. The pressure difference detection system comprises a pressure conductive medium, a pressure difference detecting chip, a power supply device and a detecting instrument; the detection method of the fluid medium pressure difference value comprises the following specific steps: 1) connecting the pressure difference with the detecting instrument as well as the power supply device; 2) respectively transferring two pressures at different positions in a detecting fluid medium to be detected by the pressure conductive medium to an upper end face and a lower end face of the pressure difference detecting chip; 3) detecting output signal change of the pressure difference detecting chip in the step 2) by the detecting instrument in real time, and detecting the pressure difference value of the fluid medium under detection. With adoption of the technical scheme, according to the detection method of the fluid medium pressure difference value, the change of the resistance value and the output current can be caused by deformation of the pressure detecting chip, so that the fluid medium pressure difference value can be accurately measured by the related detecting instrument.
Description
Technical field
The present invention relates to a kind of detection method, it is specifically related to a kind of detection method of fluid medium pressure difference.
Background technology
Often need in industrial circle to detect the pressure differential of gas or liquid.In existing delta voltage detection technique, it measures its force value respectively at the diverse location of gas to be measured or liquid often, and calculated to obtain pressure drop, said method not only needs complicated checkout equipment, and in testing process, need staff to carry out the adjustment of multiple detection position, it causes the efficiency of testing not good, and affects to the precision of pressure differential detection.
Summary of the invention
The technical problem to be solved in the present invention is to provide the method for the pressure differential of measurement gas or liquid in a kind of industrial circle, and it can facilitate and realize the measurement of pressure reduction accurately.
For solving the problems of the technologies described above, the present invention relates to a kind of detection method of fluid medium pressure difference, it is specially, the pressure difference value being treated fluid measured medium by pressure differential detection system is detected, described pressure differential detection system includes the pressure conduction medium for transmission of pressure, for the pressure differential detection chip carrying out detecting to pressure difference value Yu transmit, supply unit, and the output signal for receiving pressure differential detection chip go forward side by side line number value display measuring instrument;
The detection method of described fluid medium pressure difference includes following concrete steps:
1) by pressure differential detection system and measuring instrument, and supply unit is connected, and makes pressure differential detection chip be able to stable power-supplying, and is outputed signal real-time Transmission to measuring instrument;
2) will treat in test fluid medium by pressure conduction medium, the pressure of two diverse locations is passed to upper surface and the lower surface of pressure differential detection chip respectively, makes pressure differential detection chip generation deformation;
3) the real-time detecting step 2 of measuring instrument) in the change of pressure differential detection chip signal output, detect with the pressure difference value treating fluid measured medium.
As a modification of the present invention, described step 2) in, to treat in test fluid medium by pressure conduction medium, the concrete grammar of upper surface and lower surface that the pressure of two diverse locations is passed to pressure differential detection chip is respectively: by the relative position of two in pressure detecting system, the pressure conduction cavity of upper surface and the lower surface extending to pressure differential detection chip is respectively set, and at inside cavity stuffing pressure conductive medium; Treat in test fluid medium, to realize the pressure differential detection of fluid media (medium) by above-mentioned two pressure conduction cavitys are placed in respectively.Adopt such scheme, it is by the motion of pressure conduction medium in pressure conduction cavity, to carry out the transmission of pressure, thus the efficiency and precision detected all can be improved.
As a modification of the present invention, described step 2) in, pressure detecting system is placed in and treats before test fluid medium, pressure conduction medium need be made to riddle pressure conduction inside cavity.Adopt such scheme, it can guarantee that pressure detecting system inside maintains sufficient pressure conduction medium to carry out the transmission of pressure.
As a modification of the present invention, described pressure conduction medium includes silicone oil, and it can realize the harmless transmission of pressure.
As a modification of the present invention; described step 2) in; pressure conduction medium includes the overvoltage protection for fluid medium pressure to be measured in the transmitting procedure of pressure; it specifically includes following steps: arrange overvoltage protection diaphragm, by step 2 in pressure differential detection system inside) in the pressure conduction medium of diverse location respectively on conducting to two end faces of overvoltage protection diaphragm.Adopt such scheme, its reverse strain occurred when pressure is excessive by overvoltage protection diaphragm, makes pressure too much be released, and damages pressure differential detection chip to avoid it.
As a modification of the present invention, by step 2) in the concrete grammar of pressure conduction medium respectively on conducting to two end faces of overvoltage protection diaphragm of diverse location be: in pressure conduction cavity, access the overvoltage protection cavity extended towards overvoltage protection diaphragm.Adopt above-mentioned design, it realizes the transmission of pressure to overvoltage protection diaphragm by overvoltage protection cavity, is able to further improvement to make the overvoltage protection effect of overvoltage protection diaphragm.
As a modification of the present invention, the area of described overvoltage protection diaphragm is at least 20 times of cavity radial section area, and it can ensure the serviceability of overvoltage protection diaphragm further.
As a modification of the present invention, described pressure differential detection chip is loaded into pressure differential detection system inside by being installed on pressure differential detection chip module; Described overvoltage protection diaphragm is loaded into pressure differential detection system inside by being installed on overvoltage protection membrane module.Adopt such scheme, it can make the installation of pressure differential detection system various components inside more convenient, produces and packaging efficiency to improve it.
Adopt the detection method of the fluid medium pressure difference of technique scheme, its deformation by pressure sense die causes its resistance, and output current changes, thus measured accurately by the pressure difference value of coherent detection instrument for fluid media (medium); Above-mentioned measuring method can avoid the pressure loss in measuring process, and it is while significantly improving measuring accuracy, makes the surveying work of related personnel more convenient.
Accompanying drawing explanation
Fig. 1 is pressure differential detection system schematic diagram in the present invention.
Embodiment
Below in conjunction with embodiment, illustrate the present invention further, following embodiment should be understood and be only not used in for illustration of the present invention and limit the scope of the invention.
Embodiment 1
A kind of detection method of fluid medium pressure difference, it relates to a kind of method that pressure difference value treating fluid measured medium by pressure differential detection system carries out detecting, described pressure differential detection system as shown in Figure 1, it includes the pressure conduction medium for transmission of pressure, for the pressure differential detection chip carrying out detecting to pressure difference value Yu transmit, supply unit, and the output signal for receiving pressure differential detection chip go forward side by side line number value display measuring instrument; Described pressure conduction medium is made up of silicone oil.
The detection method of described fluid medium pressure difference includes following concrete steps:
1) by pressure differential detection system and measuring instrument, and supply unit is connected, and makes pressure differential detection chip be able to stable power-supplying, and is outputed signal real-time Transmission to measuring instrument;
2) in pressure conduction inside cavity injection pressure conductive medium, pressure conduction medium is made to be full of pressure conduction cavity;
3) will treat in test fluid medium by pressure conduction medium, the pressure of two diverse locations is passed to upper surface and the lower surface of pressure differential detection chip respectively, makes pressure differential detection chip generation deformation;
4) deformation of pressure differential detection chip causes its resistance to change, and then makes its output current signal change; The real-time detecting step 3 of measuring instrument) in the change of pressure differential detection chip signal output, detect with the pressure difference value treating fluid measured medium.
As a modification of the present invention, in described step 3), to treat in test fluid medium by pressure conduction medium, the concrete grammar of upper surface and lower surface that the pressure of two diverse locations is passed to pressure differential detection chip is respectively: by the relative position of two in pressure detecting system, the pressure conduction cavity of upper surface and the lower surface extending to pressure differential detection chip is respectively set, and at inside cavity stuffing pressure conductive medium; Treat in test fluid medium, to realize the pressure differential detection of fluid media (medium) by above-mentioned two pressure conduction cavitys are placed in respectively.Adopt such scheme, it is by the motion of pressure conduction medium in pressure conduction cavity, to carry out the transmission of pressure, thus the efficiency and precision detected all can be improved.
Adopt the detection method of the fluid medium pressure difference of technique scheme, its deformation by pressure sense die causes its resistance, and output current changes, thus measured accurately by the pressure difference value of coherent detection instrument for fluid media (medium); Above-mentioned measuring method can avoid the pressure loss in measuring process, and it is while significantly improving measuring accuracy, makes the surveying work of related personnel more convenient.
Embodiment 2
As a modification of the present invention; described step 2) in; pressure conduction medium includes the overvoltage protection for fluid medium pressure to be measured in the transmitting procedure of pressure; it specifically includes following steps: arrange overvoltage protection diaphragm, by step 2 in pressure differential detection system inside) in the pressure conduction medium of diverse location respectively on conducting to two end faces of overvoltage protection diaphragm.Adopt such scheme, its reverse strain occurred when pressure is excessive by overvoltage protection diaphragm, makes pressure too much be released, and damages pressure differential detection chip to avoid it.
As a modification of the present invention, by step 2) in the concrete grammar of pressure conduction medium respectively on conducting to two end faces of overvoltage protection diaphragm of diverse location be: in pressure conduction cavity, access the overvoltage protection cavity extended towards overvoltage protection diaphragm.Adopt above-mentioned design, it realizes the transmission of pressure to overvoltage protection diaphragm by overvoltage protection cavity, is able to further improvement to make the overvoltage protection effect of overvoltage protection diaphragm.
As a modification of the present invention, the radius of the end face of described overvoltage protection diaphragm is 35 times of cavity radial section radius, and it can ensure the serviceability of overvoltage protection diaphragm further.
As a modification of the present invention, described pressure differential detection chip is loaded into pressure differential detection system inside by being installed on pressure differential detection chip module; Described overvoltage protection diaphragm is loaded into pressure differential detection system inside by being installed on overvoltage protection membrane module.Adopt such scheme, it can make the installation of pressure differential detection system various components inside more convenient, produces and packaging efficiency to improve it.
All the other feature & benefits of the present embodiment are all identical with embodiment 1.
The detection method of the fluid medium pressure difference in the present embodiment; it is compared to the detection method of traditional fluid medium pressure difference; its overvoltage protection ability is able to remarkable improvement; the overvoltage capabilities of 90 to 100 times can be improved as by the overvoltage capabilities of 10 times in traditional detection method; simultaneously; in testing process related device accuracy of detection with detect stability, the pressure differential detection method in the technical program is compared with the improvement that also can be able to 3 to 4 times in traditional pressure differential detection method.
Claims (8)
1. the detection method of a fluid medium pressure difference, it is characterized in that, the detection method of described fluid medium pressure difference is specially, the pressure difference value being treated fluid measured medium by pressure differential detection system is detected, described pressure differential detection system includes the pressure conduction medium for transmission of pressure, for the pressure differential detection chip carrying out detecting to pressure difference value Yu transmit, supply unit, and the output signal for receiving pressure differential detection chip go forward side by side line number value display measuring instrument;
The detection method of described fluid medium pressure difference includes following concrete steps:
By pressure differential detection system and measuring instrument, and supply unit is connected, and makes pressure differential detection chip be able to stable power-supplying, and is outputed signal real-time Transmission to measuring instrument;
To treat in test fluid medium by pressure conduction medium, the pressure of two diverse locations is passed to upper surface and the lower surface of pressure differential detection chip respectively, makes pressure differential detection chip generation deformation;
The real-time detecting step 2 of measuring instrument) in the change of pressure differential detection chip signal output, detect with the pressure difference value treating fluid measured medium.
2. according to the detection method of fluid medium pressure difference according to claim 1, it is characterized in that, described step 2) in, to treat in test fluid medium by pressure conduction medium, the concrete grammar of upper surface and lower surface that the pressure of two diverse locations is passed to pressure differential detection chip is respectively: by the relative position of two in pressure detecting system, the pressure conduction cavity of upper surface and the lower surface extending to pressure differential detection chip is respectively set, and at inside cavity stuffing pressure conductive medium; Treat in test fluid medium, to realize the pressure differential detection of fluid media (medium) by above-mentioned two pressure conduction cavitys are placed in respectively.
3. according to the detection method of fluid medium pressure difference according to claim 2, it is characterized in that, described step 2) in, pressure detecting system is placed in and treats before test fluid medium, pressure conduction medium need be made to riddle pressure conduction inside cavity.
4. according to the detection method of the fluid medium pressure difference described in claims 1 to 3 any one, it is characterized in that, described pressure conduction medium includes silicone oil.
5. according to the detection method of fluid medium pressure difference according to claim 2; it is characterized in that; described step 2) in; pressure conduction medium includes the overvoltage protection for fluid medium pressure to be measured in the transmitting procedure of pressure; it specifically includes following steps: arrange overvoltage protection diaphragm, by step 2 in pressure differential detection system inside) in the pressure conduction medium of diverse location respectively on conducting to two end faces of overvoltage protection diaphragm.
6. according to the detection method of fluid medium pressure difference according to claim 5; it is characterized in that, by step 2) in the concrete grammar of pressure conduction medium respectively on conducting to two end faces of overvoltage protection diaphragm of diverse location be: in pressure conduction cavity, access the overvoltage protection cavity extended towards overvoltage protection diaphragm.
7. according to the detection method of the fluid medium pressure difference described in claim 5 or 6, it is characterized in that, the area of described overvoltage protection diaphragm is at least 20 times of cavity radial section area.
8. according to the detection method of fluid medium pressure difference according to claim 7, it is characterized in that, described pressure differential detection chip is loaded into pressure differential detection system inside by being installed on pressure differential detection chip module; Described overvoltage protection diaphragm is loaded into pressure differential detection system inside by being installed on overvoltage protection membrane module.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040682A (en) * | 1988-09-02 | 1990-03-21 | 株式会社日立制作所 | Differential pressure pick-up |
| CN101339086A (en) * | 2007-07-05 | 2009-01-07 | 上海威尔泰工业自动化股份有限公司 | Pressure sensor possessing high pressure overload protection |
| US20110239773A1 (en) * | 2010-03-30 | 2011-10-06 | Klosinski Andrew J | Resonant frequency based pressure sensor |
| CN102353497A (en) * | 2011-06-28 | 2012-02-15 | 北京布莱迪仪器仪表有限公司 | Single diaphragm differential pressure gauge |
| CN203587271U (en) * | 2013-10-31 | 2014-05-07 | 上海赛途仪器仪表有限公司 | Diaphragm-type middle differential pressure gauge |
-
2015
- 2015-04-15 CN CN201510176052.9A patent/CN104776953A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040682A (en) * | 1988-09-02 | 1990-03-21 | 株式会社日立制作所 | Differential pressure pick-up |
| CN101339086A (en) * | 2007-07-05 | 2009-01-07 | 上海威尔泰工业自动化股份有限公司 | Pressure sensor possessing high pressure overload protection |
| US20110239773A1 (en) * | 2010-03-30 | 2011-10-06 | Klosinski Andrew J | Resonant frequency based pressure sensor |
| CN102353497A (en) * | 2011-06-28 | 2012-02-15 | 北京布莱迪仪器仪表有限公司 | Single diaphragm differential pressure gauge |
| CN203587271U (en) * | 2013-10-31 | 2014-05-07 | 上海赛途仪器仪表有限公司 | Diaphragm-type middle differential pressure gauge |
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Effective date of registration: 20160425 Address after: 215600, Jiangsu Suzhou Zhangjiagang Free Trade Zone, Hong Kong and Macao Road 15 sensor industry park Applicant after: Mou Heng Address before: 215600 Jiangsu, Suzhou, Zhangjiagang Free Trade Zone, Hong Kong and Macao road sensor industry park Applicant before: The gloomy sensor Science and Technology Ltd. of Jiangsu Dare |
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Effective date of registration: 20160526 Address after: 400714 Chongqing District of Beibei city and high-tech Industrial Park Road No. 5, No. 317 of the Milky way Applicant after: Chongqing Adelson Sensor Technology Co., Ltd. Address before: 215600, Jiangsu Suzhou Zhangjiagang Free Trade Zone, Hong Kong and Macao Road 15 sensor industry park Applicant before: Mou Heng |
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Application publication date: 20150715 |