CN108195503A - Circular iris resistance-strain type pressure, differential pressure pickup - Google Patents
Circular iris resistance-strain type pressure, differential pressure pickup Download PDFInfo
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- CN108195503A CN108195503A CN201810136833.9A CN201810136833A CN108195503A CN 108195503 A CN108195503 A CN 108195503A CN 201810136833 A CN201810136833 A CN 201810136833A CN 108195503 A CN108195503 A CN 108195503A
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- pressure
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- sensitive diaphragm
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
- G01L9/0051—Transmitting or indicating the displacement of flexible diaphragms using variations in ohmic resistance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
- G01L13/02—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements
- G01L13/025—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements using diaphragms
- G01L13/026—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements using diaphragms involving double diaphragm
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
- G01L13/06—Devices or apparatus for measuring differences of two or more fluid pressure values using electric or magnetic pressure-sensitive elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/02—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
- G01L9/04—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of resistance-strain gauges
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Circular iris resistance-strain type pressure, differential pressure pickup, belong to non-electrical quantity measurement technology field.Sensor of the invention is using round sensitive diaphragm, available for measuring the relative pressure and pressure difference of fluid；Band new interface has standard signal output；It coordinates with display system, can be assembled into novel pressure instrument, pressure difference instrument, vacuum pressure instrument, pressure pressure difference instrument, water-level gauge, current meter, flowmeter etc.；Coordinate with computer, pressure can be completed（Liquid level）, pressure difference, flow velocity, flow etc. automatic detection.
Description
Technical field
The present invention relates to a kind of circular iris resistance-strain type pressure, differential pressure pickups, belong to non-electrical quantity measurement technology field.
The present invention can be used for hydraulic and hydroelectric engineering, cities and towns and industrial and mineral supply and discharge Hydraulic Projects and petroleum chemical engineering, measure river, pipeline, water
The pressure (liquid level) or pressure difference of the fluids such as library, oil (gas) tank, it can also be used to measure fluid flow rate, flow.
Background technology
There are many sensor for measuring Fluid pressure (pressure difference), according to different operating principle, there is piezoelectric type, pressure resistance type, capacitance
Formula, resistance-strain type etc..As material science and electronic information, the development of automatic technology, conventional piezoresistance sensor are universal
Using highly sensitive diffusion silicon sensor, capacitance type sensor is also more passed using ceramic condenser small, with high accuracy
Sensor.
Resistance strain type sensor is the resistance sensor that conversion element is calculated as with resistance-strain, and resistance-strain type senses
Device is made of elastic sensing element, strain ga(u)ge and box body.Compared with other sensors, resistance strain type sensor application
It is early, technology maturation.The outstanding advantages of resistance strain type sensor also reside in：Precision is high, wide range of measurement, long lifespan, and frequency response is special
Property it is good, it is easy to accomplish miniaturization, integration and diversification of varieties etc..
Finding strain electric pressure (pressure difference) sensor patent has：1. filed in 26 days October in 1991 of Jiangsu Agricultural College
《Novel pressure (poor) sensor and its interface》(Patent No. 91227117.5), the sensor are the resistance-strains of typical pattern
Sensor, two bellowss are as force transfer element, the non-circular diaphragm of elastic sensing element but board-like work beam, sensor installation
Complexity, volume are larger.
2. filed in 3 days December in 1998 of Zhang Jinchi《Low Fluid pressure is changed into the elastic element of strain》(patent
Number for 98249117.4).The sensor application circular film, Fluid pressure load directly act on diaphragm.It is but used
Diaphragm is not elastic sensing element, is intended only as force transfer element, and elastic sensing element is " integrated strain to be made with circular iris
Beam ".
3. filed in 17 days Mays in 2003 of Nagano Meter Co., Ltd.《Absolute pressure type pressure sensor》(the patent No.
For 03145462.3).This sensor elastic sensing element uses circular film, and diaphragm directly bears fluid load.But because
It is only used for measuring absolute pressure, and the one side of reference pressure is born in circular iris and must make enclosed construction, is Absolute truth in interior
It is empty.
4. filed in 25 days December in 2001 of Suopu Measurement and Control Technology Co., Ltd, Changsha, Hunan《For periphery fixed circle
The thin film strain resistor of flat diaphragm steel loop》(Patent No. 01257599.2).The patent reflects " periphery fixed circle flat membrane
The achievement in research of piece ", but this is the achievement of strain gauge, is not the achievement of sensor.
Invention content
The purpose of the present invention is in view of the above shortcomings of the prior art, a kind of circular iris resistance-strain type pressure of proposition,
Differential pressure pickup, the sensor are novel combination type resistance strain sensors, simple in structure, install convenient.
Technical scheme is as follows：Circular iris resistance-strain type pressure, differential pressure pickup, including sensor cartridge,
It is characterized in that the sensor cartridge includes the spill part with cavity and the convex pressure part with cavity, the convex pressure
The protrusion of part is connected to the recessed portion of spill part, forms sensor cartridge, the both ends of the sensor cartridge are respectively equipped with
High pressure pressure port, low pressure pressure port；Round sensitive diaphragm, the sensitive diaphragm are equipped between the spill part, convex pressure part
Be pasted with foil strain gauge on one side, the sensitive diaphragm is perpendicular to spill part, the axis of convex pressure part.
Further, the convex pressure part, sensitive diaphragm are two, and the spill part is one, and the high pressure takes
Pressure hole, low pressure pressure port are respectively placed at two convex pressure parts；Annular convex platform is equipped in the middle part of the cavity of the spill part, it is described
Convex pressure part is inserted into from the both ends of spill member cavity in spill member cavity, and be respectively placed in the both ends of annular convex platform respectively
Face；Two sensitive diaphragms are respectively placed between two convex pressure parts and annular convex platform, and the opposite face difference of two sensitive diaphragms
Bonded foiled gage.
Further, force-transmitting pole is clamped between two sensitive diaphragms, which is placed in the endoporus of annular convex platform, and
Two foil strain gauges are connected in series with.
Further, the both ends of the surface of the annular convex platform are being respectively equipped with sealing rubber ring with two sensitive diaphragm contact positions
Ⅰ；Two sensitive diaphragms are equipped with the one side of foil strain gauge and enclose composition cavity respectively with the endoporus of annular convex platform, the cavity cavity wall
It is respectively equipped with fairlead I.
Further, the sensitive diaphragm, convex pressure part, spill part are one, and the high pressure pressure port, low pressure take
Pressure hole is respectively placed in convex pressure part, at spill part；The convex pressure part, spill part junction are equipped with support accessory A, the branch
Part A is held as hollow-core construction, the sensitive diaphragm is placed between support accessory A and convex pressure part.The cavity of support accessory A with it is recessed
The low pressure pressure port unicom of shape part, sensitive diaphragm post the one of foil strain gauge facing towards low pressure pressure port.
Further, the both ends of the surface of the support accessory A are being respectively equipped with sealing with convex pressure part, spill part junction
Rubber ring II, the sensitive diaphragm two sides dip-coating fluid sealant.The sensitive diaphragm is equipped with the one side and spill of foil strain gauge
Composition cavity is enclosed between part, which is equipped with fairlead II, and the support accessory A is set with II corresponding position of fairlead
There is through-hole I.
Further, the sensitive diaphragm, convex pressure part, spill part are one, and the high pressure pressure port, low pressure take
Pressure hole is respectively placed in convex pressure part, at spill part, and the convex pressure part, spill part junction set that there are two hollow-core constructions
Support accessory B；One of support accessory B is being equipped with power transmission elastic piece with convex press at feature contacts, another support accessory B exists
With also being provided with power transmission elastic piece at spill feature contacts；The sensitive diaphragm is placed between two support accessories, and sensitive diaphragm
It is clamped with power transmission pearl respectively between two power transmission elastic pieces.The cavity of two support accessory B respectively with high pressure pressure port, low pressure
Pressure port unicom, sensitive diaphragm post the one of foil strain gauge facing towards low pressure pressure port.
Further, annular slab is equipped in the middle part of the cavity of each support accessory B, the power transmission pearl is placed in the endoporus of annular slab
Place, the end face of two support accessory B are respectively equipped with sealing rubber ring III with convex pressure part, spill part junction.The sensitivity
Diaphragm, which is equipped between the one side of foil strain gauge and spill part, encloses composition cavity, which is equipped with fairlead III, branch
It holds part B and is being equipped with through-hole II with III corresponding position of fairlead.
Further, the diameter of the sensitive diaphragmCircumferential direction forms clamped, effective diameter D=22mm, quick
Sense diaphragm is made of beryllium-bronze or phosphor bronze, modulus of direct elasticityPoisson's coefficient μ=0.3.
Further, to improve linear sensor, load factor Q should be controlled in a certain range：
Q=p (R/h)4/E≤3.5 (1)
P is load (Pa) in formula, and R is sensitive diaphragm radius (mm), and h is sensitive diaphragm thickness (mm)；
The sensitive diaphragm thickness h：
h≥R/[(3.5E/p)1/4] (2)；
The sensitive diaphragm radial direction and tangential strain value：
εr=3p (1- μ2)(R2-3r2)/(8Eh2) (3)
εt=3p (1- μ2)(R2-r2)/(8Eh2) (4)；
The sensitive diaphragm is radially and tangential maximum strain value is equal：
εrmax=εtmax=3p (1- μ2)R2/(8Eh2) (5)。
There are four types of schemes altogether for the pressure of the present invention, differential pressure pickup：
1. as shown in Figure 1, using two round and elastic sensitive diaphragms, two strain gauges are pasted, one is born high pressure Pm, one
It is a to bear low pressure Pn.Cavity between two diaphragms does not contact detected fluid, conducive to protection foil strain gauge.This sensor is real
Border is two independent pressure sensors, and the effect of this sensor is：Relative pressure can be measured, pressure difference can also be measured.
If low-pressure side leads to air, high pressure side joint detected fluid, measured result is the relative pressure of detected fluid.During for measuring pressure difference,
High pressure pressure port, low pressure pressure port lead to high pressure and low pressure detected fluid, and pressure difference is high pressure and the difference of low pressure, Δ P=Pm-Pn, can
It is acquired by interface circuit, can also be handled and realized by instrumented data.
2. as shown in Fig. 2-1, using two sensitive diaphragms, paste two strain gauges, one is born high pressure, one bear it is low
Pressure.This sensor is characterized in that：There is force-transmitting pole between two sensitive diaphragms, elastic sensitive diaphragm bears the even cloth lotus of fluid on one side
It carries, pastes the load for bearing force-transmitting pole on one side of strain gauge, conducive to sensitivity is improved.As shown in Fig. 2-2,2-3, two strains
The positive series wiring of meter or differential concatenation wiring.The difference of the program and one of scheme is：In mechanical structure, scheme one is two
A independent sensor, elastic sensitive diaphragm respectively have individual output without contact, strain gauge；2 two sensitive diaphragm cooperations of scheme
Work, two strain gauge electric bridge series connection, though respectively there is individual power supply, only there are one exporting, the sensitive diaphragm for bearing high pressure leads to
Force-transmitting pole is crossed by pressure transmission to bearing at the sensitive diaphragm of low pressure, reading synthesis of the final detected value for two strain gauges.
Two sensor practical application of scheme is mainly that pressure difference measures, and bears the sensitive diaphragm of high pressure and bears low pressure
Sensitive diaphragm leads to high-pressure fluid and low-pressure fluid respectively by convex pressure part, as water gage and other special case applicable cases.It is low
Pressure side leads to air, high pressure side joint detected fluid, and measured result is the relative pressure of detected fluid.
3. as shown in Fig. 3-1,3-2, using a sensitive diaphragm, a strain gauge is pasted, sensitive diaphragm is without strain gauge
High pressure is born on one side, and have strain gauge bears low pressure on one side.This sensor can measure relative pressure, can also measure pressure difference.
As water gage and other special case applicable cases, low-pressure side leads to air, and high pressure side joint detected fluid, measured result is detected fluid
Relative pressure.If high and low pressure side connects high and low pressure detected fluid respectively, then measured result is pressure difference.This sensor is used for liquid
Body pressure difference measures occasion, sensitive diaphragm two sides dip-coating fluid sealant, to meet two sides contact liq requirement.
4. as shown in Fig. 4-1,4-2, using a diaphragm, a strain gauge is pasted, sensitive diaphragm bears high pressure on one side, separately
Low pressure is born on one side.This sensor is characterized in that different from scheme three：It installs respectively at sensor high and low pressure pressure port position
Two thin power transmission elastic pieces, and respectively by two power transmission pearls in a manner of concentrated force, Fluid pressure is reached in sensitive diaphragm
Heart point.When in use, low-pressure side leads to air, high pressure side joint detected fluid to this sensor, and measured result is the phase of detected fluid
To pressure.If high and low pressure side connects high-low pressure detected fluid respectively, then measured result is pressure difference.This sensor is different from scheme
First, it two, three is further characterized in that：No matter for any operating mode, the two sides of elastic sensitive diaphragm, strain gauge do not contact measured stream
Body.
As sensor, electric part is further included.Pressure (pressure difference) sensor electric part of the present invention includes strain gauge electricity
Bridge and interface circuit, sensor interface circuitry have ripe technology.But required to take into account explosion-proof wait, supply voltage is limited
System, resistance-strain pressure (pressure difference) sensor output signal is weaker, and exclusive PCR ensures to export the emphasis that stabilization is design.In recent years
The NSA (C) 2860 to appear on the market is the integrated industrial sensor conditioning pick-up chip of first domestic high-precision, can be applied successfully to each
Kind resistive or capacitance type sensor.NSA2860 is integrated with external JFET controllers, 24 main signal Measurement channels, sensor school
The circuits such as quasi- logic, two-way constant-current source, and digital interface can be supported to export, analog voltage output, the output of 4~20mA pick-ups,
The various patterns such as PWM/PDM outputs.NSA2860 only needs minimum external devices, you can realize pressure transmission module calibration and
Pick-up.By built-in MCU, NSA2860 supports the zero to sensor, the second-order temperature drift calibration of sensitivity and three ranks
Gamma correction, calibration accuracy can reach within 0.1%, and calibration factor is stored in one group of EEPROM.Pressure of the present invention
The newest ideal interface circuit chips NSA286 advanced, small, cheap using function of (pressure difference) sensor.
About the interface circuit of sensor, because of the new product that chip NSA286 systems appear on the market in recent years, more than 4 electrostrictive strain pressure measurement
Application of power (pressure difference) the sensor national patent without this advanced chip.
The patent document being previously mentioned in background technology 1., compared with the present invention, because having two bellowss as force transfer element,
The non-circular sensitive diaphragm of elastic sensing element but board-like work beam, sensor installation is complicated, and volume is larger, and structure is different.
2. diaphragm used is not elastic sensing element to patent document, is intended only as force transfer element, and elastic sensing element is and diaphragm
" integrated strain beam is made " in piece, also differs widely with the structure of the present invention.The elastic sensing element of patent document 3. is using circle
Shape diaphragm, diaphragm directly bear fluid load；It is absolute in interior but because it is only used for measuring absolute pressure, and low-pressure side is closed
Vacuum is different from structure of the present invention；Sensor of the invention structure is used to measure pressure difference, can also measure relative pressure, low
Pressure side is not closed, and is in direct contact detected fluid or logical air.4. patent document reflects " periphery fixed circle flat diaphragm "
Achievement in research, but this is the achievement of strain gauge, is not the achievement of sensor, and the present invention is using " periphery fixed circle flat diaphragm "
Pressure (pressure difference) sensor, be strain gauge application.
Sensor of the invention can be used for measuring the relative pressure and pressure difference of fluid；Band new interface (i.e. NSA2860 cores
Piece), there is standard signal output；Itself and display system coordinate, and can be assembled into novel pressure instrument, pressure difference instrument, vacuum-pressure instrument,
Pressure-pressure difference instrument, water-level gauge, current meter, flowmeter etc.；Coordinate with computer, pressure (liquid level), pressure difference, flow velocity, stream can be completed
The automatic detection of amount etc..
Description of the drawings
Fig. 1 be the present invention program one in circular iris resistance-strain type pressure, differential pressure pickup structure diagram；
Fig. 2-1 be the present invention program two in circular iris resistance-strain type pressure, differential pressure pickup structure diagram；
Fig. 2-2 is foil strain gauge forward direction series connection schematic diagram in the present invention program two；
Fig. 2-3 is foil strain gauge differential concatenation schematic diagram in the present invention program two；
Fig. 3-1 be the present invention program three in circular iris resistance-strain type pressure, differential pressure pickup structure diagram；
Fig. 3-2 is the assembling schematic diagram of Fig. 3-1；
Fig. 4-1 be the present invention program four in circular iris resistance-strain type pressure, differential pressure pickup structure diagram；
Fig. 4-2 is the assembling schematic diagram of Fig. 4-1；
In figure：1 spill part, 2-1 support accessory A, 2-2 support accessories B, 3 convex pressure parts, 4 round sensitive diaphragms, 5 foils
Formula strain gauge, 6-1 sealing rubber rings I, 6-2 sealing rubber rings II, 6-3 sealing rubber rings III, 7-1 fairleads I, 7-2 fairleads
IIth, 7-3 fairleads III, 8 high pressure pressure ports, 9 low pressure pressure ports, 10 power transmission elastic pieces, 11 power transmission pearls, 12 force-transmitting poles, 13 annulars
Boss, 14-1 through-holes I, 14-2 through-holes II, 15 annular mounting plates.
Specific embodiment
1. embodiment one
As shown in Figure 1, sensor structure includes：Spill part 1, convex pressure part 3, I 6-1 of sealing rubber ring, elasticity are sensitive
Diaphragm 4, foil strain gauge 5, I 7-1 of fairlead, high pressure pressure port 8, low pressure pressure port 9.Box body is the branch of elastic sensitive diaphragm 4
Part is held, convex pressure part 3 protrudes into part 1 with thread connection, compresses elastic sensitive diaphragm 4, foil strain is pasted on flexible sheet
It counts and sealing rubber ring I is filled between 5, with box body, leaded hole I on box body, 3 threaded pressure tapping connector 8 of convex pressure part, 9 (i.e. high pressures
Pressure port, low pressure pressure port).During working sensor, two diaphragms are respectively subjected to detected fluid pressure PmAnd Pn。
Sensor production includes：
1. flexible sheet makes：1) metallic elastic piece is processed：By selected material and work load such as p (Pa), press more than
Design and calculation method determines load factor Q, foil gauge thickness h；2) suitable strain gauge is chosen, selects foil strain gauge；3) should
Become meter to paste, cure：Strain gauge stickup and curing are completed by strain gauge technology for applying；4) strain gauge is connected into bridge and protection：Bridge
Arm resistance is connected into after electric bridge so that after the shampooing of acetone cotton balls, dilute gel coating is protected.
2. box body is processed：1) nonferrous materials (brass, stainless steel or alloy aluminum) is selected；2) it is machined.
3. interface circuit design, modulation.
4. it installs：Installation contact surface, thread contact face are shampooed with acetone, and sealing rubber ring applies fluid sealant (silica gel).
Explanation：Box body spill part 1, box body protrude into part 3 in addition to using non-ferrous metal mechanical processing, and PSA also can be used
Or SPA3D printings；Support accessory 2 preferably uses SPA material 3D printings.
2. embodiment two
As shown in Fig. 2-1,2-2,2-3, sensor structure includes：Spill part 1, it is convex pressure part 2, sealing rubber ring 6-1,
Elasticity, sensitive diaphragm 4, foil strain gauge 5, fairlead 7-1, force-transmitting pole 12, pressure port 8 and 9.It is with one difference of embodiment：
The strain gauge electric bridge of two flexible sheets is connected into combined type electric bridge, has force-transmitting pole 7 between two flexible sheets.Remaining same embodiment
One.
Sensor production, installation basic demand are the same as embodiment one.Pay attention to checking force-transmitting pole flexibility and length ruler in installation
Very little, force-transmitting pole is slightly longer than the clear distance of two circular iris in assembling, it is ensured that load transmits continuous.
3. embodiment three
As shown in Fig. 3-1,3-2, sensor structure includes：Spill part 1, support accessory 2, convex pressure part 3, sensitive diaphragm
4th, foil strain gauge 5, " O " shape sealing rubber ring 6-2, fairlead 7-2, high pressure pressure port 8, low pressure pressure port 9.This sensor
With embodiment one, two the difference lies in：Only there are one sensitive diaphragms.The convex pressure part 3 of box body is packed into recessed with threaded connection mode
Shape part 1 has " O " shape rubber ring 6-2 is filled in the two sides groove of support accessory A 2-1, support accessory A therebetween.
During working sensor, pressure port 8 leads to high pressure.When measuring pressure and liquid level, 9 one end of pressure port leads to air；During pressure measurement difference,
Pressure port 9 one terminates low pressure.This sensor diaphragm two sides can all contact detected fluid, need dip-coating waterproof insulation glue.
Sensor production, installation basic demand are the same as embodiment one.Box body spill part 1, box body, which protrude into part 3 and remove to use, to be had
Non-ferrous metal mechanical processing is outer, and PSA or SPA3D printings also can be used；Support accessory 2 preferably uses SPA material 3D printings.
4. example IV
As shown in Fig. 4-1,4-2, sensor structure includes：Spill part 1, support accessory 2, box body protrude into part 3, sensitivity
Diaphragm 4, foil strain gauge 5, " O " shape sealing rubber ring 6-3, fairlead 7-3, high pressure pressure port 8, low pressure pressure port 9, power transmission bullet
Property piece 10, power transmission pearl 11.This sensor is different from embodiment three, separately there is the thin slice of two contact detected fluids outside sensitive diaphragm
(power transmission elastic piece) 10 has power transmission ball 11 between thin slice and elastic sensitive diaphragm.Therefore, it is sensitive no matter for which kind of occasion
The two sides of diaphragm does not contact detected fluid.
During installation, box body protrudes into part 3 and is packed into spill part 1 with threaded connection mode, and there are two support accessory B therebetween
2-2, sensitive diaphragm 4 are clipped between two support accessories, and " O " shape rubber ring 6-3 is filled in groove.
During working sensor, pressure port 8 leads to high pressure.When measuring pressure and liquid level, 9 one end of pressure port leads to air；During pressure measurement difference,
Pressure port 9 one terminates low pressure.
Sensor production, installation basic demand are the same as embodiment one.Box body spill part 1, box body, which protrude into part 3 and remove to use, to be had
Non-ferrous metal mechanical processing is outer, and PSA or SPA3D printings also can be used；Support accessory 2 preferably uses SPA material 3D printings.
Power transmission pearl is strict with using standard product.Pay attention to checking power transmission pearl flexibility, power transmission pearl in assembling in installation
Diameter is slightly larger than circular iris and the clear distance of elastic sheet, it is ensured that load transmits continuous.
This sensor elasticity sensitive diaphragm forms two cavitys with power transmission thin slice, due to sensitive diaphragm and two bearings zero
Without seal approach between part B, so the endless totally-enclosed of the two cavitys, there is no pressure difference, therefore acts on the lotus of sensing element
It carries in addition to power transmission pearl load, without other unbalanced loads.
By the mechanical characteristic of the clamped diaphragm of surrounding, evenly load p and concentrated force F (=0.25 π R2P) center maximum becomes
Shape is respectively：
w0=wmax=3p (1- μ2)R4/(16Eh3) (6)
wmax=3F (1- μ2)·4R2/(4Eπ·4h3) (7)。
It follows that under corresponding loading condition, the anamorphic effect of concentrated force expands 4 times than even cloth load.That is, only
Want thin slice selection appropriate, it is unlikely to reduce transducer sensitivity when increasing steel tape.
Claims (8)
1. a kind of circular iris resistance-strain type pressure, differential pressure pickup, including sensor cartridge, it is characterized in that, the sensor
Box body includes the spill part with cavity（1）And the convex pressure part with cavity（3）, the protrusion company of the convex pressure part
The recessed portion of spill part is connected to, forms sensor cartridge, the both ends of the sensor cartridge are respectively equipped with high pressure pressure port（8）、
Low pressure pressure port（9）；Round sensitive diaphragm is equipped between the spill part, convex pressure part（4）, the one side of the sensitive diaphragm
It is pasted with foil strain gauge（5）, the sensitive diaphragm is perpendicular to spill part, the axis of convex pressure part.
2. circular iris resistance-strain type pressure according to claim 1, differential pressure pickup, it is characterized in that, the convex pressure zero
Part, sensitive diaphragm are two, and the spill part is one, and the high pressure pressure port, low pressure pressure port are respectively placed in two
At convex pressure part；Annular convex platform is equipped in the middle part of the cavity of the spill part（13）, the convex pressure part is respectively from spill part
The both ends of cavity are inserted into spill member cavity, and are respectively placed in the both ends of the surface of annular convex platform；Two sensitive diaphragms are respectively placed in
Between two convex pressure parts and annular convex platform, and the opposite face difference bonded foiled gage of two sensitive diaphragms.
3. circular iris resistance-strain type pressure according to claim 2, differential pressure pickup, it is characterized in that, two sensitive membranes
Force-transmitting pole is clamped between piece（12）, which is placed in the endoporus of annular convex platform, and two foil strain gauges are connected in series with.
4. the circular iris resistance-strain type pressure according to Claims 2 or 3, differential pressure pickup, it is characterized in that, the annular
The both ends of the surface of boss are being respectively equipped with sealing rubber ring I with two sensitive diaphragm contact positions（6-1）.
5. circular iris resistance-strain type pressure according to claim 1, differential pressure pickup, it is characterized in that, the sensitive membrane
Piece, convex pressure part, spill part are one, and the high pressure pressure port, low pressure pressure port are respectively placed in convex pressure part, spill zero
At part；The convex pressure part, spill part junction are equipped with support accessory A（2-1）, support accessory A is hollow-core construction, described
Sensitive diaphragm is placed between support accessory A and convex pressure part.
6. circular iris resistance-strain type pressure according to claim 5, differential pressure pickup, it is characterized in that, the bearing zero
The both ends of the surface of part A are being respectively equipped with sealing rubber ring II with convex pressure part, spill part junction（6-2）, the sensitive diaphragm
Two sides dip-coating fluid sealant.
7. circular iris resistance-strain type pressure according to claim 1, differential pressure pickup, it is characterized in that, the sensitive membrane
Piece, convex pressure part, spill part are one, and the high pressure pressure port, low pressure pressure port are respectively placed in convex pressure part, spill zero
At part, the convex pressure part, spill part junction set the support accessory B there are two hollow-core construction（2-2）；One of bearing
Part B is being equipped with power transmission elastic piece with convex press at feature contacts（10）, another support accessory B with spill feature contacts at
Equipped with power transmission elastic piece（10）；The sensitive diaphragm is placed between two support accessories, and sensitive diaphragm and two power transmission elasticity
Power transmission pearl is clamped between piece respectively（11）.
8. circular iris resistance-strain type pressure according to claim 7, differential pressure pickup, it is characterized in that, each support zero
Annular slab is equipped in the middle part of the cavity of part B（15）, the power transmission pearl is placed at the endoporus of annular slab, the end face of two support accessory B
Sealing rubber ring III is respectively equipped with convex pressure part, spill part junction（6-3）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810136833.9A CN108195503A (en) | 2018-02-09 | 2018-02-09 | Circular iris resistance-strain type pressure, differential pressure pickup |
Applications Claiming Priority (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112834112A (en) * | 2021-01-04 | 2021-05-25 | 郑州东辰科技有限公司 | Force standard device and hydraulic bearing device |
| CN114459666A (en) * | 2022-02-14 | 2022-05-10 | 北京航空航天大学 | Capacitive differential pressure sensor, manufacturing method and application thereof |
| CN116793210A (en) * | 2023-08-04 | 2023-09-22 | 松诺盟科技有限公司 | Nano composite film, strain sensor and application thereof |
| CN119214616A (en) * | 2024-11-21 | 2024-12-31 | 宁波芯联心医疗科技有限公司 | Pressure sensing device and pressure sensing system based on implanted medical instrument |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4364276A (en) * | 1979-12-19 | 1982-12-21 | Hitachi, Ltd. | Differential pressure measuring transducer assembly |
| CN1140836A (en) * | 1995-07-14 | 1997-01-22 | 横河电机株式会社 | Semiconductor differential pressure measuring device |
| CN1651891A (en) * | 2005-02-25 | 2005-08-10 | 沈阳市传感技术研究所 | Telemetering high-temp pressure resistant / differential pressure sensor |
| CN1974372A (en) * | 2006-12-15 | 2007-06-06 | 沈阳仪表科学研究院 | Monolithic integrated sensor chip for measing three parameters of pressure difference, absolute pressure and temperature and its making process |
| CN102012288A (en) * | 2010-10-28 | 2011-04-13 | 西安交通大学 | Composite micro-electro-mechanical system (MEMS) high-temperature resistant ultrahigh-pressure sensor |
| CN203259298U (en) * | 2013-05-09 | 2013-10-30 | 广州森纳士仪器有限公司 | High static pressure piezoresistance differential pressure transmitter |
| CN106768589A (en) * | 2017-01-10 | 2017-05-31 | 北京中航兴盛测控技术有限公司 | High accuracy diaphragm pressure sensor |
| CN208026421U (en) * | 2018-02-09 | 2018-10-30 | 扬州江天流量仪表有限公司 | Circular iris resistance-strain type pressure, differential pressure pickup |
-
2018
- 2018-02-09 CN CN201810136833.9A patent/CN108195503A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4364276A (en) * | 1979-12-19 | 1982-12-21 | Hitachi, Ltd. | Differential pressure measuring transducer assembly |
| CN1140836A (en) * | 1995-07-14 | 1997-01-22 | 横河电机株式会社 | Semiconductor differential pressure measuring device |
| CN1651891A (en) * | 2005-02-25 | 2005-08-10 | 沈阳市传感技术研究所 | Telemetering high-temp pressure resistant / differential pressure sensor |
| CN1974372A (en) * | 2006-12-15 | 2007-06-06 | 沈阳仪表科学研究院 | Monolithic integrated sensor chip for measing three parameters of pressure difference, absolute pressure and temperature and its making process |
| CN102012288A (en) * | 2010-10-28 | 2011-04-13 | 西安交通大学 | Composite micro-electro-mechanical system (MEMS) high-temperature resistant ultrahigh-pressure sensor |
| CN203259298U (en) * | 2013-05-09 | 2013-10-30 | 广州森纳士仪器有限公司 | High static pressure piezoresistance differential pressure transmitter |
| CN106768589A (en) * | 2017-01-10 | 2017-05-31 | 北京中航兴盛测控技术有限公司 | High accuracy diaphragm pressure sensor |
| CN208026421U (en) * | 2018-02-09 | 2018-10-30 | 扬州江天流量仪表有限公司 | Circular iris resistance-strain type pressure, differential pressure pickup |
Non-Patent Citations (1)
| Title |
|---|
| 李新娥;祖静;徐鹏;: "新型应变式高膛压测试系统研制" * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112834112A (en) * | 2021-01-04 | 2021-05-25 | 郑州东辰科技有限公司 | Force standard device and hydraulic bearing device |
| CN114459666A (en) * | 2022-02-14 | 2022-05-10 | 北京航空航天大学 | Capacitive differential pressure sensor, manufacturing method and application thereof |
| CN116793210A (en) * | 2023-08-04 | 2023-09-22 | 松诺盟科技有限公司 | Nano composite film, strain sensor and application thereof |
| CN116793210B (en) * | 2023-08-04 | 2024-03-29 | 松诺盟科技有限公司 | Nano composite film, strain sensor and application thereof |
| CN119214616A (en) * | 2024-11-21 | 2024-12-31 | 宁波芯联心医疗科技有限公司 | Pressure sensing device and pressure sensing system based on implanted medical instrument |
| CN119214616B (en) * | 2024-11-21 | 2025-02-14 | 宁波芯联心医疗科技有限公司 | Pressure sensing device and pressure sensing system based on implanted medical instrument |
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