CN103968995A - Flexible pressure measuring based fluid pressure sensor - Google Patents
Flexible pressure measuring based fluid pressure sensor Download PDFInfo
- Publication number
- CN103968995A CN103968995A CN201410109372.8A CN201410109372A CN103968995A CN 103968995 A CN103968995 A CN 103968995A CN 201410109372 A CN201410109372 A CN 201410109372A CN 103968995 A CN103968995 A CN 103968995A
- Authority
- CN
- China
- Prior art keywords
- lower casing
- frame
- resistance
- elastic deformation
- fluid passage
- 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.)
- Granted
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 44
- 230000005489 elastic deformation Effects 0.000 claims abstract description 28
- 239000002184 metal Substances 0.000 claims abstract description 17
- 210000004907 gland Anatomy 0.000 claims description 19
- 238000009530 blood pressure measurement Methods 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 8
- 239000012528 membrane Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
Abstract
The invention discloses a flexible pressure measuring based fluid pressure sensor. The flexible pressure measuring based fluid pressure sensor comprises a shell composed of an upper shell and a lower shell. The upper end of the upper shell is provided with a lead hole, a circuit board is arranged in an inner cavity of the upper shell, a power source signal cable of the circuit board is penetratingly arranged in the lead hole, the lower end of the lower shell is provided with a fluid passage, the fluid passage is communicated with an inner cavity of the lower shell, and a metal elastic piece component is arranged in the inner cavity of the fluid passage. The metal elastic piece component is composed of a frame and an elastic deformation piece fixed on the frame, a resistance strain gauge is arranged on the upper portion of the elastic deformation piece, the resistance strain gauge is electrically connected with the circuit board, and an elastic membrane is arranged between the metal elastic piece component and the fluid passage and in the lower shell. The flexible pressure measuring based fluid pressure sensor has the advantages of high pressure detection accuracy, wide application range, simple structure, low cost and long service life.
Description
Technical field
The present invention relates to sensor device field, be specifically related to a kind of fluid pressure sensor based on elasticity pressure measurement.
Background technology
Fluid pressure sensor is a kind of professional checkout equipment for detection of hydrodynamic pressure, and structure generally includes housing and is located at presser sensor module, the amplifying circuit in housing.But the presser sensor modular structure complexity of the fluid pressure sensor of prior art, causes the cost of fluid pressure sensor of prior art higher, and easily damages.
Summary of the invention
The technical problem to be solved in the present invention is to provide that a kind of pressure detection precision is high, the fluid pressure sensor based on elasticity pressure measurement of applied range, simple in structure, with low cost, long service life.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
Based on a fluid pressure sensor for elasticity pressure measurement, comprise the housing being formed by upper casing and lower casing, the upper end of described upper casing is provided with fairlead, in the inner chamber of described upper casing, is provided with circuit board, and the power supply signal cable of described circuit board is arranged in fairlead; The lower end of described lower casing is provided with fluid passage, described fluid passage is communicated with the inner chamber of lower casing, in the inner chamber of described fluid passage, be provided with metal clips assembly, described metal clips assembly is made up of frame and the elastic deformation sheet being fixed on frame, the top of described elastic deformation sheet is provided with resistance strain gage, described resistance strain gage is electrically connected with circuit board, in described lower casing, between metal clips assembly, fluid passage, is provided with flexible sheet.
In the inner chamber of described lower casing, be also provided with the spacing gland for limiting elastic deformation sheet stroke.
Described spacing gland is tubbiness, described spacing gland is provided with axial arranged multiple the first mounting holes along lower casing, described frame is provided with axial arranged multiple the second mounting holes along lower casing, described flexible sheet is provided with multiple the 3rd mounting holes, described the first mounting hole, the second mounting hole, the 3rd mounting hole three is corresponding one by one, the bucket of described spacing gland is along the edge of being close to frame, the edge of flexible sheet is close at the edge of described frame, and described spacing gland, frame, flexible sheet three is by multiple first mounting holes that pass successively, the second mounting hole, the web member of the 3rd mounting hole is connected with the bottom of lower casing inner chamber.
The top of described elastic deformation sheet is provided with two resistance strain gages, on described circuit board, comprise that two gather resistance and an amplifier, described two resistance strain gages form one for gathering the resistance bridge of elastic deformation sheet deformation quantity as two resistance and described two collection resistance, and the output terminal of described resistance bridge is connected with the input end of amplifier.
The fluid pressure sensor that the present invention is based on elasticity pressure measurement has following advantage: in the inner chamber of fluid passage of the present invention, be provided with metal clips assembly, metal clips assembly is made up of frame and the elastic deformation sheet being fixed on frame, the top of elastic deformation sheet is provided with resistance strain gage, resistance strain gage is electrically connected with circuit board, in lower casing, be positioned at metal clips assembly, between fluid passage, be provided with flexible sheet, receive the hydrodynamic pressure in fluid passage by flexible sheet, cause the deformation of elastic deformation sheet by the pressure of flexible sheet, deformation by elastic deformation sheet drives resistance strain gage, and then realize the detection of the hydrodynamic pressure in convection cell passage by the resistance variations that circuit board gathers resistance strain gage, there is pressure detection precision high, applied range, simple in structure, with low cost, the advantage of long service life.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is embodiment of the present invention sectional structure schematic diagram in working order.
Fig. 2 is the sectional structure schematic diagram of the embodiment of the present invention in off working state.
What Fig. 3 was the embodiment of the present invention in off working state analyses and observe decomposition texture schematic diagram.
Fig. 4 is the main TV structure schematic diagram of metal clips assembly in the embodiment of the present invention.
Fig. 5 is the main TV structure schematic diagram of embodiment of the present invention Elastic diaphragm.
Fig. 6 is the perspective view of spacing gland in the embodiment of the present invention.
Fig. 7 is the circuit theory schematic diagram of the circuit part of the embodiment of the present invention.
Marginal data: 1, housing; 11, upper casing; 111, fairlead; 12, lower casing; 121, fluid passage; 2, circuit board; 21, power supply signal cable; 22, gather resistance; 23, amplifier; 3, metal clips assembly; 31, frame; 311, the second mounting hole; 32, elastic deformation sheet; 33, resistance strain gage; 4, flexible sheet; 41, the 3rd mounting hole; 5, spacing gland; 51, the first mounting hole.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention are made to more explicit defining.
As shown in Figure 1, Figure 2 and Figure 3, the fluid pressure sensor of the present embodiment based on elasticity pressure measurement comprises the housing 1 being made up of upper casing 11 and lower casing 12, the upper end of upper casing 11 is provided with fairlead 111, in the inner chamber of upper casing 11, be provided with circuit board 2, the power supply signal cable 21 of circuit board 2 is arranged in fairlead 111; The lower end of lower casing 12 is provided with fluid passage 121, fluid passage 121 is communicated with the inner chamber of lower casing 12, in the inner chamber of fluid passage 121, be provided with metal clips assembly 3, metal clips assembly 3 is made up of frame 31 and the elastic deformation sheet 32 being fixed on frame 31, the top of elastic deformation sheet 32 is provided with resistance strain gage 33, resistance strain gage 33 is electrically connected with circuit board 2, in lower casing 12, between metal clips assembly 3, fluid passage 121, is provided with flexible sheet 4.The present embodiment receives the hydrodynamic pressure in fluid passage 121 by flexible sheet 4, cause 32 deformation of elastic deformation sheet by the pressure of flexible sheet 4, deformation by elastic deformation sheet 32 drives resistance strain gage 33, and then realize the detection of the hydrodynamic pressure in convection cell passage 121 by the resistance variations that circuit board 2 gathers resistance strain gage 33, have advantages of that pressure detection precision is high, applied range, simple in structure, with low cost, long service life.
As shown in Figure 1, Figure 2 and Figure 3, in the present embodiment, in the inner chamber of lower casing 12, be also provided with the spacing gland 5 for limiting elastic deformation sheet 32 strokes.The spacing gland 5 of the present embodiment is specifically located at the top of elastic deformation sheet 32, thereby can realize restriction elastic deformation sheet 32 strokes, and then can prevent that hydrodynamic pressure (splash and rise) is excessive flexible sheet 4, elastic deformation sheet 32 damaged and cannot reset and affect precision, thereby can guarantee the serviceable life of flexible sheet 4, elastic deformation sheet 32, guarantee pressure detection degree of accuracy.
As Fig. 4, shown in Fig. 5 and Fig. 6, in the present embodiment, spacing gland 5 is tubbiness, spacing gland 5 is provided with axial arranged multiple the first mounting holes 51 along lower casing 12, frame 31 is provided with axial arranged multiple the second mounting holes 311 along lower casing 12, flexible sheet 4 is provided with multiple the 3rd mounting holes 41, the first mounting hole 51, the second mounting hole 311, the 3rd mounting hole 41 threes are corresponding one by one, the bucket of spacing gland 5 is along the edge of being close to frame 31, the edge of flexible sheet 4 is close at the edge of frame 31, and spacing gland 5, frame 31, flexible sheet 4 threes are by multiple first mounting holes 51 that pass successively, the second mounting hole 311, the web member of the 3rd mounting hole 41 is connected with the bottom of lower casing 12 inner chambers.Pass through said structure, can guarantee the reliable connection between spacing gland 5, frame 31, flexible sheet 4 threes, can guarantee to be tightly connected between flexible sheet 4 and lower casing 12, prevent from letting out in the pressure in fluid passage 121, thereby guarantee that flexible sheet 4 can accurately detect the fluid pressure value in fluid passage 121.
As shown in Fig. 4 and Fig. 7, the top of the present embodiment Elastic distortion sheet 32 is provided with two resistance strain gage 33(R1 and R2), on circuit board 2, comprise that two gather resistance 22(R3 and R4) and an amplifier 23(the present embodiment in amplifier 23 based on integrated computation amplification chip AD820 realization), two resistance strain gages 33 gather resistance 22(R3 and R4 as two resistance (R1 and R2) with two) form one for gathering the resistance bridge (R1 of elastic deformation sheet 32 deformation quantities, R2, R3, R4), resistance bridge (R1, R2, R3, R4) output terminal is connected with the input end of amplifier 23.The present embodiment adopts resistance bridge (R1, R2, R3, R4) and an amplifier 23 to realize signals collecting and amplification, simple in structure, with low cost, volume compact.
The course of work of the present embodiment is as follows: fluid enters fluid passage 121, the pressure top compression elasticity diaphragm 4 of fluid, flexible sheet 4 is to frame 31 upside generation deformation, promote top compression elasticity distortion sheet 32, elastic deformation sheet 32 drives resistance strain gage 33 to deform, the resistance value of resistance strain gage 33 changes, the voltage that resistance bridge (R1, R2, R3, R4) gathers the resistance change of resistance strain gage 33 inputs to integrated computation amplification chip AD820, integrated computation amplification chip AD820 amplifies voltage, then exports by power supply signal cable 21.
The foregoing is only the preferred embodiment of the present invention, protection scope of the present invention is not limited in above-mentioned embodiment, and every technical scheme that belongs to the principle of the invention all belongs to protection scope of the present invention.For a person skilled in the art, some improvements and modifications of carrying out under the prerequisite that does not depart from principle of the present invention, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. the fluid pressure sensor based on elasticity pressure measurement, comprise the housing (1) being formed by upper casing (11) and lower casing (12), it is characterized in that: the upper end of described upper casing (11) is provided with fairlead (111), in the inner chamber of described upper casing (11), be provided with circuit board (2), the power supply signal cable (21) of described circuit board (2) is arranged in fairlead (111), the lower end of described lower casing (12) is provided with fluid passage (121), described fluid passage (121) is communicated with the inner chamber of lower casing (12), in the inner chamber of described fluid passage (121), be provided with metal clips assembly (3), described metal clips assembly (3) is by frame (31) and be fixed on elastic deformation sheet (32) formation on frame (31), the top of described elastic deformation sheet (32) is provided with resistance strain gage (33), described resistance strain gage (33) is electrically connected with circuit board (2), in described lower casing (12), be positioned at metal clips assembly (3), between fluid passage (121), be provided with flexible sheet (4).
2. the fluid pressure sensor based on elasticity pressure measurement according to claim 1, is characterized in that: in the inner chamber of described lower casing (12), be also provided with the spacing gland (5) for limiting elastic deformation sheet (32) stroke.
3. the fluid pressure sensor based on elasticity pressure measurement according to claim 2, it is characterized in that: described spacing gland (5) is tubbiness, described spacing gland (5) is provided with axial arranged multiple the first mounting holes (51) along lower casing (12), described frame (31) is provided with axial arranged multiple the second mounting holes (311) along lower casing (12), described flexible sheet (4) is provided with multiple the 3rd mounting holes (41), described the first mounting hole (51), the second mounting hole (311), the 3rd mounting hole (41) three is corresponding one by one, the bucket of described spacing gland (5) is along the edge of being close to frame (31), the edge of flexible sheet (4) is close at the edge of described frame (31), and described spacing gland (5), frame (31), flexible sheet (4) three is by multiple the first mounting holes (51) that pass successively, the second mounting hole (311), the web member of the 3rd mounting hole (41) is connected with the bottom of lower casing (12) inner chamber.
4. the fluid pressure sensor based on elasticity pressure measurement according to claim 3, it is characterized in that: the top of described elastic deformation sheet (32) is provided with two resistance strain gages (33), on described circuit board (2), comprise that two gather resistance (22) and an amplifier (23), described two resistance strain gages (33) form one for gathering the resistance bridge of elastic deformation sheet (32) deformation quantity as two resistance and described two collection resistance (22), and the output terminal of described resistance bridge is connected with the input end of amplifier (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410109372.8A CN103968995B (en) | 2014-03-21 | 2014-03-21 | Based on the fluid pressure sensor of elasticity pressure measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410109372.8A CN103968995B (en) | 2014-03-21 | 2014-03-21 | Based on the fluid pressure sensor of elasticity pressure measurement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103968995A true CN103968995A (en) | 2014-08-06 |
| CN103968995B CN103968995B (en) | 2016-03-30 |
Family
ID=51238769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410109372.8A Expired - Fee Related CN103968995B (en) | 2014-03-21 | 2014-03-21 | Based on the fluid pressure sensor of elasticity pressure measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103968995B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131462A (en) * | 2019-04-11 | 2019-08-16 | 深圳垦拓流体控制有限公司 | The automatically controlled protection system and automatically controlled guard method of solenoid valve, solenoid valve |
| CN111007207A (en) * | 2019-12-26 | 2020-04-14 | 重庆溢哲渝实业有限公司 | Simple installation and dirt-proof humidity sensor module |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3894435A (en) * | 1972-11-01 | 1975-07-15 | Hitachi Ltd | Pressure sensor |
| CN2364449Y (en) * | 1998-12-03 | 2000-02-16 | 张金驰 | Elastic element capable of transforming low flow pressure into strain |
| US20010039837A1 (en) * | 1997-07-25 | 2001-11-15 | Yukihiko Tanizawa | Pressure detecting apparatus with metallic diaphragm |
| CN1336538A (en) * | 2001-09-12 | 2002-02-20 | 西安交通大学 | High-temperature pressure sensor |
| CN203811315U (en) * | 2014-03-21 | 2014-09-03 | 刘剑飚 | Fluid pressure sensor based on elastic pressure measurement |
-
2014
- 2014-03-21 CN CN201410109372.8A patent/CN103968995B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3894435A (en) * | 1972-11-01 | 1975-07-15 | Hitachi Ltd | Pressure sensor |
| US20010039837A1 (en) * | 1997-07-25 | 2001-11-15 | Yukihiko Tanizawa | Pressure detecting apparatus with metallic diaphragm |
| CN2364449Y (en) * | 1998-12-03 | 2000-02-16 | 张金驰 | Elastic element capable of transforming low flow pressure into strain |
| CN1336538A (en) * | 2001-09-12 | 2002-02-20 | 西安交通大学 | High-temperature pressure sensor |
| CN203811315U (en) * | 2014-03-21 | 2014-09-03 | 刘剑飚 | Fluid pressure sensor based on elastic pressure measurement |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131462A (en) * | 2019-04-11 | 2019-08-16 | 深圳垦拓流体控制有限公司 | The automatically controlled protection system and automatically controlled guard method of solenoid valve, solenoid valve |
| CN111007207A (en) * | 2019-12-26 | 2020-04-14 | 重庆溢哲渝实业有限公司 | Simple installation and dirt-proof humidity sensor module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103968995B (en) | 2016-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9377372B2 (en) | Small-sized load sensor unit | |
| CN206178720U (en) | Touch -control writing pen | |
| CN102135458A (en) | Strain beam type soil pressure sensor | |
| CN202066629U (en) | Strain beam type earth pressure sensor | |
| CN103968995B (en) | Based on the fluid pressure sensor of elasticity pressure measurement | |
| CN105973525A (en) | High-reliability piezoresistive pressure sensor | |
| CN203811315U (en) | Fluid pressure sensor based on elastic pressure measurement | |
| CN203241111U (en) | Vehicle oil tank oil level detection device | |
| CN106248240B (en) | A kind of temperature transmitter with temperature-compensating | |
| KR20160078274A (en) | Physical quantity measuring device | |
| CN101551268A (en) | Piezoelectric type infrasonic sensor capable of offsetting mechanical vibration signals | |
| CN103196598A (en) | Photoelectric type force sensor | |
| CN103868641A (en) | Micro differential pressure sensor | |
| CN102135439A (en) | One-key zero-returning device of transmitter | |
| CN205209684U (en) | High reliability pressure drag formula pressure sensor | |
| CN204718634U (en) | A kind of pick-up unit towards ultrasonic sensor and system | |
| CN209945431U (en) | Anti-vibration vortex street flowmeter | |
| CN204831693U (en) | Water pump signal converter | |
| CN203177902U (en) | Online replacing type concealed induction flow meter | |
| CN113503958A (en) | Broadband vibration signal sensor and signal processing device thereof | |
| CN208223706U (en) | A kind of high-performance differential pressure pickup | |
| CN202522367U (en) | Intelligent pressure transmitter | |
| CN208833799U (en) | A kind of high temperature modification vibration acceleration sensor | |
| CN207556716U (en) | For the circuit board mounting structure of inching sensor | |
| KR101001865B1 (en) | Contactless sensor circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160113 Address after: 528300 No. 11, Chong Long Road, Leliu Industrial Zone, Shunde District, Guangdong, Foshan Applicant after: Foshan City Tianying Rubber & Plastic Electrical Appliance Co., Ltd. Applicant after: Liu Jianbiao Address before: 130062 Jilin province Changchun Luyuan District of Longsheng Hutong No. 11-3 Applicant before: Liu Jianbiao |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 528300 Guangdong Province, Foshan city Shunde District Daliang Honggang neighborhood exhibition industry No. 3 AAA District Co-patentee after: Liu Jianbiao Patentee after: Foshan win Star Technology Co., Ltd. Address before: 528300 No. 11, Chong Long Road, Leliu Industrial Zone, Shunde District, Guangdong, Foshan Co-patentee before: Liu Jianbiao Patentee before: Foshan City Tianying Rubber & Plastic Electrical Appliance Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170803 Address after: 528300 Guangdong Province, Foshan city Shunde District Daliang Honggang neighborhood exhibition industry No. 3 AAA District Co-patentee after: Liu Yang Patentee after: Foshan win Star Technology Co., Ltd. Address before: 528300 Guangdong Province, Foshan city Shunde District Daliang Honggang neighborhood exhibition industry No. 3 AAA District Co-patentee before: Liu Jianbiao Patentee before: Foshan win Star Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160330 Termination date: 20200321 |