CN208420257U - A kind of novel piezoresistance type pressure pickup - Google Patents
A kind of novel piezoresistance type pressure pickup Download PDFInfo
- Publication number
- CN208420257U CN208420257U CN201821218650.3U CN201821218650U CN208420257U CN 208420257 U CN208420257 U CN 208420257U CN 201821218650 U CN201821218650 U CN 201821218650U CN 208420257 U CN208420257 U CN 208420257U
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- China
- Prior art keywords
- housing
- pedestal
- signal processing
- processing element
- pressing sleeve
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model belongs to pressure sensor technique field, more particularly to a kind of novel piezoresistance type pressure pickup, including pedestal, housing, pressure cell, Signal Processing Element and connector head, pedestal is fixedly connected with housing, pedestal offers pressure chamber close to one end of housing, housing offers the accommodating chamber being connected to pressure chamber close to one end of pedestal, pressure cell is arranged in pressure chamber, Signal Processing Element is arranged in accommodating chamber, interior pressing sleeve is provided between pressure cell and Signal Processing Element, one end of interior pressing sleeve is contacted with pressure cell, Signal Processing Element is fixed on the other end of interior pressing sleeve, felt pad is provided between interior pressing sleeve and Signal Processing Element, the one end of housing far from pedestal is arranged in connector head, gasket is provided between connector head and housing, it puts on to run through outside and has adjustment hole, adjustment hole is located at gasket Lower section removes gasket and passes through the resistance sizes of the potentiometer of adjustment hole adjustment signal processing element.
Description
Technical field
The utility model belongs to pressure sensor technique field more particularly to a kind of novel piezoresistance type pressure pickup.
Background technique
Pressure sensor (Pressure Transducer) is to experience pressure signal, and can incite somebody to action according to certain rule
Pressure signal is converted into the device or device of the electric signal of available output, pressure sensor be widely used in space flight, aviation,
The every field such as navigation, petrochemical industry, dynamic power machine, biomedical engineering, meteorology, geology, seismic survey.Pressure sensor is logical
Often be made of pressure cell and signal processing unit, current pressure sensor be all by by pressure cell under pressure
The variation that the deformation of generation is converted into sensor electric parameters carrys out the size of real-time response pressure.Pressure cell encloses pressure
Interior, pressure cell are electrically connected with signal processing unit, and adjustment signal processing unit output letter is provided on signal processing unit
The regulating device of number size, general regulating device are potentiometer, by adjusting the resistance sizes of potentiometer come adjustment signal processing
Element output signal size realizes the output accuracy for adjusting pressure sensor.
Pressure sensor has the following deficiencies: that the fixed form of pressure cell is not firm at present, and pressure cell is caused to receive
Pressure signal is more sluggish, reduces the sensitivity of pressure sensor；It is not good between signal processing unit and pressure cell
Insulation set causes the signal between pressure cell and signal processing unit to transmit and is interfered, reduces the essence of pressure sensor
Degree；In general, pressure sensor has just been debugged according to required precision using preceding, and often have in use it is various because
Element causes precision inaccurate, influences data collection and analysis and monitoring, and because pressure sensor pedestal and housing are welded seals,
It cannot tear open, once assembling in sealing to pressure sensor, the resistance sizes of potentiometer are not easy to adjust from the external world signal processing unit,
It needs to remove signal processing unit and just be adjusted, replacement is sometimes also not easy, so such issues that solve at the scene is very numb
It is tired.
Utility model content
It is not easy to adjust to solve the output signal size of the signal processing unit of pressure sensor of the existing technology
Problem, the utility model provide a kind of novel piezoresistance type pressure pickup.
In order to solve the above technical problems, technical solution used by the utility model is as follows, a kind of novel piezoresistance type pressure
Sensor, including pedestal, housing, pressure cell, Signal Processing Element and connector head, the pedestal are fixedly connected with housing,
The pedestal offers pressure chamber close to one end of housing, and the housing is offered close to one end of pedestal to be connected to pressure chamber
Accommodating chamber, the pressure cell are arranged in pressure chamber, and the Signal Processing Element is arranged in accommodating chamber, the signal processing
Element is electrically connected with pressure cell, and interior pressing sleeve is provided between the pressure cell and Signal Processing Element, the interior pressing sleeve
One end is contacted with pressure cell, and the Signal Processing Element is fixed on the other end of interior pressing sleeve, the interior pressing sleeve and signal processing
Felt pad is provided between element, the one end of housing far from pedestal, the connector head and signal is arranged in the connector head
Processing element electrical connection, is provided with gasket between the connector head and housing, it is described it is outer put on through there is adjustment hole, it is described
Adjustment hole is located at the lower section of gasket, removes resistance of the gasket by the potentiometer of the adjustment hole adjustment signal processing element
Size.
Preferably, being provided with the adjusting screw for adjusting resistance sizes on the potentiometer, the adjusting screw direction is adjusted
Knothole.It backs out attachment screw to remove connector head and gasket, then adjusting screw is adjusted by adjustment hole with screwdriver, pass through
Adjusting screw adjusts the resistance sizes of potentiometer, changes the size of the output signal of Signal Processing Element, that is, controls pressure biography
The precision of sensor, adjustment structure solves the problems, such as that Pressure Sensor Precision is inconvenient to adjust, and adjustment structure is simple, and design is skilful
Wonderful, it is convenient to operate.
Preferably, being provided with annular protrusion on the pedestal, the housing is arranged on the base by accommodating chamber, described
The end of housing is contacted with annular protrusion, and the pedestal and housing use laser welded seal.Traditional handicraft is using manual argon
Arc-welding, this process efficiency is low, and quality is not easy control, and uses laser welding process, can change this situation, improves and produces
Quality and efficiency.
Preferably, the interior pressing sleeve is annular, the interior pressing sleeve radially outward prolongs close to one end of Signal Processing Element
Stretching has the first flange, and the interior pressing sleeve is threadedly coupled with pressure chamber, when interior pressing sleeve is to when pressure cell precession, first flange
It is moved close to the end face of pedestal.It clamps the first flange and tightens interior pressing sleeve, make interior pressing sleeve that pressure cell is pressed abd fixed on pressure
Interior, the setting of the first flange, the turn operation of convenient interior pressing sleeve.
Further, the felt pad is annular, and the through-hole of the felt pad is connected to the through-hole of interior pressing sleeve.Pressure cell
The electric wire connected with Signal Processing Element passes through the through-hole of interior pressing sleeve and the through-hole of felt pad, structurally reasonable reliable.
Further, outer put on offers threaded hole, and attachment screw, the connection are provided on the connector head
Screw is threadedly coupled with threaded hole.Connector head easy to disassemble；Connector head is removed, due to connector head and signal processing
The connection of element live wire, electric wire have certain length, and connector head, which removes, does not influence signal transmission, is adjusted and is believed with small word bottle opener
Adjusting screw on number processing element, to guarantee that precision reaches requirement.
Further, the connector head is detachably clamped with connector holder, when connector head is caught in connector holder, institute
It states connector head to be electrically connected with connector holder, the stuffing-box for drawing electric wire is provided on the connector holder.
The utility model has the advantages that the novel piezoresistance type pressure pickup of the utility model, attachment screw is backed out by connector head and close
Packing is removed, then adjusts adjusting screw by adjustment hole with screwdriver, and the resistance sizes of potentiometer are adjusted by adjusting screw, are changed
The size of the output signal of varying signal processing element, that is, control the precision of the pressure sensor, and adjustment structure solves pressure biography
Sensor precision is inconvenient to the problem of adjusting, and adjustment structure is simple, ingenious in design, and it is convenient to operate；Pressure cell passes through interior pressing sleeve
It is pressed abd fixed in pedestal, no-movable part, high reliablity, precision is high, can work in the severe ring such as vibration, impact, strong jamming
Border；Signal Processing Element is fixed on internal pressure and puts on, and centre, which is equipped with felt pad, ensures that signal transmission is not interfered and influences.
Detailed description of the invention
Fig. 1 is the partial schematic sectional view of the utility model novel piezoresistance type pressure pickup；
Fig. 2 be the utility model novel piezoresistance type pressure pickup broken section be intended to (wherein connector holder is not illustrated
Out)；
Fig. 3 is the schematic side view of the housing of the utility model novel piezoresistance type pressure pickup；
Fig. 4 is the pedestal of the utility model novel piezoresistance type pressure pickup and the partial schematic sectional view of housing cooperation；
Fig. 5 is the partial schematic sectional view of the pedestal of the utility model novel piezoresistance type pressure pickup；
Fig. 6 is the schematic cross-sectional view of the interior pressing sleeve of the utility model novel piezoresistance type pressure pickup；
1, pedestal in figure, 1-1, pressure chamber, 1-2, annular protrusion, 1-3, channel, 2, housing, 2-1, accommodating chamber, 2-2, tune
Knothole, 2-3, threaded hole, 3, pressure cell, 3-1, sealing ring, 4, Signal Processing Element, 4-1, adjusting screw, 5, connector head,
6, interior pressing sleeve, 6-1, the first flange, 7, felt pad, 8, gasket, 9, attachment screw, 10, connector holder, 11, stuffing-box.
Specific embodiment
Embodiment
As shown in figs. 1 to 6, a kind of novel piezoresistance type pressure pickup, including pedestal 1, housing 2, pressure cell 3, signal
Processing element 4 and connector head 5, the pedestal 1 are fixedly connected with housing 2, and the pedestal 1 is offered close to one end of housing 2
Pressure chamber 1-1, through there is the channel 1-3 being connected to pressure chamber 1-1 on the pedestal 1, the housing 2 is close to one end of pedestal 1
The accommodating chamber 2-1 being connected to pressure chamber 1-1 is offered, the pressure cell 3 is arranged in pressure chamber 1-1, the pressure cell 3
On be arranged with the sealing ring 3-1 contacted with pressure chamber 1-1, the Signal Processing Element 4 is arranged in accommodating chamber 2-1, the letter
Number processing element 4 is electrically connected with pressure cell 3, and interior pressing sleeve 6, institute are provided between the pressure cell 3 and Signal Processing Element 4
The one end for stating interior pressing sleeve 6 is contacted with pressure cell 3, and the Signal Processing Element 4 is fixed on the another of interior pressing sleeve 6 by fixing screws
One end, is provided with felt pad 7 between the interior pressing sleeve 6 and Signal Processing Element 4, the setting of connector head 5 is separate in housing 2
One end of pedestal 1, the connector head 5 are electrically connected with Signal Processing Element 4, are provided between the connector head 5 and housing 2
Gasket 8, through thering is adjustment hole 2-2, the adjustment hole 2-2 to be located at the lower section of gasket 8, the potentiometer on the housing 2
On be provided with the adjusting screw 4-1, the adjusting screw 4-1 that adjust resistance sizes towards adjustment hole 2-2, it is logical to remove gasket 8
Cross the resistance sizes of the potentiometer of the adjustment hole 2-2 adjustment signal processing element 4.
Pressure cell 3 is made on the substrate of semiconductor material through diffusion resistance according to the piezoresistive effect of semiconductor material
At device, substrate can be directly as measurement sensing element, and diffusion resistance be connected into electric bridge form in substrate, when substrate by
External force and when generating deformation, each diffusion resistance value will change, and electric bridge will generate corresponding uneven output, pass through
The signal conversion of Signal Processing Element 4 passes signal.The material of pressure cell 3 be silicon wafer, silicon wafer be sensitive material and
Manufactured silicon piezoresistive transducer is primarily used to measurement pressure and speed.
In order to improve the quality of the pressure sensor, annular protrusion 1-2 is provided on the pedestal 1, the housing 2 passes through
Accommodating chamber 2-1 is set on pedestal 1, and the end of the housing 2 is contacted with annular protrusion 1-2, and the pedestal 1 is used with housing 2
Laser welded seal.Pressure cell 3 is pressed abd fixed in pressure chamber 1-1 in order to facilitate the operation of interior pressing sleeve 6, the interior pressing sleeve 6
For annular, the interior pressing sleeve 6 extends radially outwardly close to one end of Signal Processing Element 4 the first flange 6-1, the interior pressing sleeve
6 are threadedly coupled with pressure chamber 1-1, and when interior pressing sleeve 6 is to when 3 precession of pressure cell, the first flange 6-1 is close to the end of pedestal 1
Face movement.In order to which the electric wire that pressure cell 3 and Signal Processing Element 4 connect passes through interior pressing sleeve 6 and felt pad 7, the felt pad 7
For annular, the through-hole of the felt pad 7 is connected to the through-hole of interior pressing sleeve 6.
Threaded hole 2-3 is offered on the housing 2, and attachment screw 9, the connection spiral shell are provided on the connector head 5
Nail 9 is threadedly coupled with threaded hole 2-3.The connector head 5 is detachably clamped with connector holder 10, when 5 company of being caught in of connector head
When connecing device seat 10, the connector head 5 is electrically connected with connector holder 10, is provided on the connector holder 10 for drawing electric wire
Stuffing-box 11.
Working principle is as follows:
Fluid is after the channel 1-3 of pedestal 1 is flowed in pressure chamber 1-1 and acted on pressure cell 3, the substrate of pressure cell 3
Deformation is generated by external force, each diffusion resistance value will change, and electric bridge will generate corresponding uneven output, lead to
The signal conversion for crossing Signal Processing Element 4 passes signal through connector head 5, measures the pressure and speed of fluid；
When needing to adjust the precision of the pressure sensor, first backs out attachment screw 9 and tear connector head 5 and gasket 8 open
It removes, then adjusting screw 4-1 is adjusted by adjustment hole 2-2 with screwdriver, the resistance for adjusting potentiometer by adjusting screw 4-1 is big
It is small, change the size of the output signal of Signal Processing Element 4, that is, adjusts the precision of the pressure sensor.
Claims (7)
1. a kind of novel piezoresistance type pressure pickup, it is characterised in that: including pedestal (1), housing (2), pressure cell (3), letter
Number processing element (4) and connector head (5), the pedestal (1) are fixedly connected with housing (2), and the pedestal (1) is close to housing
(2) one end offers pressure chamber (1-1), and the housing (2) offers with pressure chamber (1-1) even close to the one end of pedestal (1)
Logical accommodating chamber (2-1), in pressure chamber (1-1), Signal Processing Element (4) setting exists for pressure cell (3) setting
In accommodating chamber (2-1), the Signal Processing Element (4) is electrically connected with pressure cell (3), at the pressure cell (3) and signal
It is provided with interior pressing sleeve (6) between reason element (4), one end of the interior pressing sleeve (6) is contacted with pressure cell (3), at the signal
Reason element (4) is fixed on the other end of interior pressing sleeve (6), is provided with insulation between the interior pressing sleeve (6) and Signal Processing Element (4)
It pads (7), connector head (5) setting is in the one end of housing (2) far from pedestal (1), the connector head (5) and signal processing
Element (4) electrical connection, is provided with gasket (8) between the connector head (5) and housing (2), and running through on the housing (2) has
Adjustment hole (2-2), the adjustment hole (2-2) are located at the lower section of gasket (8), remove gasket (8) and pass through the adjustment hole (2-
2) resistance sizes of the potentiometer of adjustment signal processing element (4).
2. novel piezoresistance type pressure pickup according to claim 1, it is characterised in that: be provided with tune on the potentiometer
The adjusting screw (4-1) of resistance sizes is saved, the adjusting screw (4-1) is towards adjustment hole (2-2).
3. novel piezoresistance type pressure pickup according to claim 1, it is characterised in that: be provided on the pedestal (1)
Annular protrusion (1-2), the housing (2) are set on pedestal (1) by accommodating chamber (2-1), the end of the housing (2) and ring
Shape protrusion (1-2) contact, the pedestal (1) and housing (2) use laser welded seal.
4. novel piezoresistance type pressure pickup according to claim 1, it is characterised in that: the interior pressing sleeve (6) is annular,
The interior pressing sleeve (6) extends radially outwardly close to the one end of Signal Processing Element (4) to be had the first flange (6-1), the interior pressing sleeve
(6) it is threadedly coupled with pressure chamber (1-1), when interior pressing sleeve (6) is to when pressure cell (3) precession, first flange (6-1) is close
The end face of pedestal (1) moves.
5. novel piezoresistance type pressure pickup according to claim 4, it is characterised in that: the felt pad (7) is annular,
The through-hole of the felt pad (7) is connected to the through-hole of interior pressing sleeve (6).
6. novel piezoresistance type pressure pickup according to claim 1, it is characterised in that: offered on the housing (2)
Threaded hole (2-3) is provided with attachment screw (9) on the connector head (5), the attachment screw (9) and threaded hole (2-3) spiral shell
Line connection.
7. novel piezoresistance type pressure pickup according to claim 1 or 6, it is characterised in that: the connector head (5) with
Connector holder (10) detachably be clamped, when connector head (5) is caught in connector holder (10), the connector head (5) with connect
Device seat (10) is electrically connected, and the stuffing-box (11) for drawing electric wire is provided on the connector holder (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821218650.3U CN208420257U (en) | 2018-07-31 | 2018-07-31 | A kind of novel piezoresistance type pressure pickup |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821218650.3U CN208420257U (en) | 2018-07-31 | 2018-07-31 | A kind of novel piezoresistance type pressure pickup |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208420257U true CN208420257U (en) | 2019-01-22 |
Family
ID=65124439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821218650.3U Expired - Fee Related CN208420257U (en) | 2018-07-31 | 2018-07-31 | A kind of novel piezoresistance type pressure pickup |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208420257U (en) |
-
2018
- 2018-07-31 CN CN201821218650.3U patent/CN208420257U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| 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: 20190122 |