CN210071218U - Impact-resistant piston type pressure sensor - Google Patents
Impact-resistant piston type pressure sensor Download PDFInfo
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- CN210071218U CN210071218U CN201921315538.6U CN201921315538U CN210071218U CN 210071218 U CN210071218 U CN 210071218U CN 201921315538 U CN201921315538 U CN 201921315538U CN 210071218 U CN210071218 U CN 210071218U
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- pressure sensor
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Abstract
The utility model provides an impact-resistant piston pressure sensor, this application temperature compensation board seal in the first cavity of casing one end through sealed glue, circuit board bottom plate with the temperature compensation board is connected through loosing the needle, and the circuit board bottom plate is fixed in through removable mode on the insulating pad on the first cavity inner wall of casing, still including set up in piston in the casing other end through-hole is provided with the strain column on the piston, is provided with the work foil gage on the strain column outer wall, and the work foil gage passes through the gold wire and is connected with circuit board bottom plate, still is provided with the retaining ring in the casing, the retaining ring with piston one end forms the second cavity, and the strain column is arranged in the second cavity, the top of strain column with the retaining ring bottom is inconsistent. This application arranges the piston lower extreme in the platform of wanting the pressure measurement, and the pressure measurement oil makes the post that meets an emergency produce elastic deformation to the piston application of force, the atress transmission through the piston, and the strain takes place simultaneously for the work foil gage on the post that meets an emergency, derives data through the circuit board floor with the change of its resistance value.
Description
Technical Field
The utility model relates to a pressure sensor field, more specifically, concretely relates to piston pressure sensor of shock-resistant.
Background
The existing pressure sensor generally comprises a lead 1 ', a sealant 2 ', a shell 10 ', a circuit board bottom plate 9 ', a chip 7 ', a diaphragm 6 ', a scattering pin 3 ', a gold wire 5 ', a temperature compensation plate 8 ' and the like, wherein the chip 7 ' is bonded on the diaphragm 6 ' through a fixing adhesive 11 ', the diaphragm 6 ' is generally thin, and when a large impact force is applied to the diaphragm, the damage to the diaphragm and the chip can be caused, so that the performance of the sensor is influenced, therefore, the above problems can be solved only by increasing the thickness of the diaphragm, as shown in fig. 1 (CN 209085832U in the prior art), the thickness of the diaphragm is increased to 0.15mm-1.5mm, and the material is stainless steel, so that not only is the cost increased, but also the diaphragm made of the stainless steel material is easy to deform, when the pressure distribution of fluid contacted with each part of the diaphragm is uneven, and a certain pressure difference exists more or less, make each position of diaphragm warp just more inhomogeneous, not only influence the measurement accuracy of sensor, the diaphragm takes place arc deformation when warping moreover, and measurement and calculation to the pressure that leads to this arc deformation are comparatively loaded down with trivial details, and simultaneously, the diaphragm receives external disturbance or damage very easily, and sensor probe's performance is unstable, and life is shorter.
SUMMERY OF THE UTILITY MODEL
The utility model provides a problem and not enough to exist among the prior art provides a piston pressure sensor of shock-resistant, and not only the pressure measurement precision is high, the leakproofness is good, when receiving the pressure that produces in the twinkling of an eye moreover, can protect the circuit board bottom plate among the pressure sensor not receive the vibration and damage, has strengthened pressure sensor's impact resistance, and the pressure measurement scope is wide, simple structure simultaneously, convenient to use, low price.
In order to realize the purpose, the utility model discloses a technical scheme as follows: the utility model provides an impact-resistant piston pressure sensor, includes wire, casing, temperature compensation board, circuit board bottom plate, looses needle and gold wire, the temperature compensation board is sealed in the first cavity of casing one end through sealed glue, circuit board bottom plate with the temperature compensation board is connected through loosing the needle, circuit board bottom plate is fixed in through removable mode on the insulating pad on the first cavity inner wall of casing, punching press-resistant piston pressure sensor is still including setting up the piston in the through-hole of casing other end the piston upper end is provided with the strain column, be provided with the work foil gage on the strain column outer wall, the work foil gage passes through the gold wire is connected with circuit board bottom plate, still be provided with the retaining ring in the casing, the retaining ring with piston one end forms the second cavity, the strain column is arranged in the second cavity, the top end of the strain column is abutted to the bottom end of the check ring.
As the utility model discloses further improve, the casing with the retaining ring passes through the welding mode rigid coupling to the leakproofness of the whole sensor of more effectual assurance has avoided the harm of outside abominable environment to sensor inner member.
As the utility model discloses further improve, the external diameter of strain post bottom is greater than the piston external diameter, and with the internal diameter phase-match of second cavity to the more even transmission of atress of piston gives the strain post, makes work foil gage takes place to meet an emergency simultaneously, derives data through the circuit board floor with the change of its resistance value.
As the utility model discloses further improve, the strain column is the type of falling T, work foil gage is pasted around the strain column, and it is wide to monitor pressure area like this, and is more accurate.
As a further improvement, the retainer ring is provided with a groove, and the gold wire passes through the groove and then is connected to the circuit board bottom plate. The slot may be provided so long as the gold wire is connected to the circuit board substrate.
As the utility model discloses further improve, the material of piston is carbide, can keep out the outside pressure in the twinkling of an eye that receives to protect inside component not to receive the damage, strengthen pressure sensor's impact resistance.
As a further improvement, the number of the working strain gauges is at least 1. A plurality of the sensors can be arranged according to actual measurement needs.
As a further improvement, the strain column and the piston are integrally formed. So that the tightness of the entire sensor is better.
As the utility model discloses further improve, the work foil gage is glued through glass and is fixed in on the strain column.
The utility model has the advantages that: the utility model provides a piston pressure sensor, not only the pressure measurement precision is high, the leakproofness is good, is receiving the pressure that produces in the twinkling of an eye moreover, can protect the circuit board bottom plate among the pressure sensor not receive the vibration and damage, has strengthened pressure sensor's impact resistance, and the pressure measurement scope is wide, simple structure simultaneously, convenient to use, low price.
Drawings
Fig. 1 is a cross-sectional view of a piston-type pressure sensor of the present invention;
in the figure, the reference numeral 1 is a lead, 2 is sealant, 3 is a loose needle, 4 is an insulating gasket, 5 is a gold wire, 6 is a working strain gauge, 7 is a piston, 8 is a temperature compensation plate, 9 is a circuit board bottom plate, 10 is a shell, 11 is a strain column, 12 is pressure measuring oil, 13 is a first cavity, 14 is a check ring, and 15 is a second cavity.
FIG. 2 is a cross-sectional view of a prior art piston-type pressure sensor;
in the figure, the reference numeral 1 ' is a lead, 2 ' is sealant, 3 ' is a loose needle, 5 ' is a gold wire, a membrane [ P1], 7 ' is a chip, 8 ' is a temperature compensation plate, 9 ' is a circuit board bottom plate, 10 ' is a shell, and 11 ' is fixing glue.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the utility model provides an impact-resistant piston pressure sensor, which comprises a lead 1, a housing 10, a temperature compensation plate 8, a circuit board bottom plate 9, a scattering needle 3 and a gold wire 5, wherein the temperature compensation plate 8 is sealed in a first cavity 13 at one end of the housing 10 through sealant 2, the circuit board bottom plate 9 is connected with the temperature compensation plate 8 through the scattering needle 3, the circuit board bottom plate 9 is detachably fixed on an insulating gasket on the inner wall of the first cavity 13 of the housing 10, the impact-resistant piston pressure sensor further comprises a piston 7 arranged in a through hole at the other end of the housing 10, a strain column 11 is arranged at the upper end of the piston 7, a work strain foil 6 is arranged on the outer wall of the strain column 11, the work strain foil 6 is connected with the circuit board bottom plate 9 through the gold wire, a retainer ring 14 is further arranged in the housing 10, the retainer ring 14 and one end of the piston 7 form a second cavity 15, the strain column 11 is arranged in the second cavity 15, and the top end of the strain column is abutted to the bottom end of the retainer ring
The shell 10 and the retainer ring 14 are fixedly connected by welding, so that the sealing performance of the whole sensor is more effectively ensured, and the damage of the external severe environment to the internal elements of the sensor is avoided.
A groove is arranged on the retainer ring 14, and the gold wire is connected to the circuit board bottom plate 9 after passing through the groove. The slotting technique is prior art and is not described here as long as the slots are arranged such that gold wires are connected to the circuit board bottom plate 9.
The piston 7 is made of hard alloy and can resist the instantaneous pressure applied to the outside, so that internal elements are protected from being damaged, and the impact resistance of the pressure sensor is enhanced.
The strain column 11 is of an inverted T shape, and the working strain foil 6 is pasted on the periphery of the strain column 11, so that the pressure monitoring area is wide and accurate.
The outer diameter of the bottom end of the strain column 11 is larger than the outer diameter of the piston 7 and is matched with the inner diameter of the second cavity 15, so that stress of the piston is transmitted to the strain column more uniformly, resistance of the working strain gauge changes, and a pressure value is led out through the circuit board bottom plate and the lead.
The number of the working strain gauges 6 is at least 1. A plurality of the sensors can be arranged according to actual measurement needs.
The strain column 11 and the piston 7 are integrally formed. The sealing of the entire sensor is better.
The working strain gauge 6 is fixed on the strain column 11 through glass cement.
The working principle is as follows: the lower end of the piston is arranged on a platform to be measured, pressure measuring oil 12 applies force to the piston 7, the strain column generates elastic deformation through the stress transmission of the piston, the working strain gauges on the strain column simultaneously generate strain, and the change of the resistance value of the strain gauge is led out through the floor of the circuit board to obtain data
The utility model has the advantages that: the utility model provides a piston pressure sensor, not only the pressure measurement precision is high, the leakproofness is good, is receiving the pressure that produces in the twinkling of an eye moreover, can protect the circuit board bottom plate among the pressure sensor not receive the vibration and damage, has strengthened pressure sensor's impact resistance, and the pressure measurement scope is wide, simple structure simultaneously, convenient to use, low price.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, but also to cover any modifications or equivalent changes made in the technical spirit of the present invention, which fall within the scope of the present invention.
Claims (9)
1. An impact-resistant piston type pressure sensor comprises a lead, a shell, a temperature compensation plate, a circuit board bottom plate, a scattered needle and a gold wire, the temperature compensation plate is sealed in a first cavity at one end of the shell through sealant, the circuit board bottom plate is connected with the temperature compensation plate through scattered needles, the circuit board bottom plate is detachably fixed on the insulating gasket on the inner wall of the first cavity of the shell, it is characterized by also comprising a piston arranged in a through hole at the other end of the shell, wherein the upper end of the piston is provided with a strain column, the outer wall of the strain column is provided with a working strain foil which is connected with the circuit board bottom plate through the gold wire, the shell is further internally provided with a check ring, the check ring and one end of the piston form a second cavity, the strain column is arranged in the second cavity, and the top end of the strain column is abutted to the bottom end of the check ring.
2. An impact resistant piston pressure sensor as in claim 1, wherein said housing and said retainer ring are fixedly attached by welding.
3. An impact resistant piston pressure transducer as claimed in claim 2 wherein the outer diameter of the bottom end of said strain gage is larger than the outer diameter of the piston and matches the inner diameter of said second chamber.
4. An impact-resistant piston-type pressure sensor as claimed in claim 3, wherein said strain gauge is of inverted T-shape and said working strain gage is affixed around the strain gauge.
5. An impact resistant piston pressure transducer as claimed in claim 4 wherein said retaining ring is provided with a slot through which said gold wire is connected to said circuit board substrate.
6. An impact resistant piston pressure sensor as in claim 5, wherein said piston is cemented carbide.
7. An impact resistant piston pressure sensor as in claim 6, wherein said number of active strain gages is at least 1.
8. An impact resistant piston pressure sensor as in claim 7, wherein said strain gage and piston are integrally formed.
9. An impact resistant piston pressure sensor as in claim 8, wherein said operational strain gage is secured to said strain gage by glass cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921315538.6U CN210071218U (en) | 2019-08-14 | 2019-08-14 | Impact-resistant piston type pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921315538.6U CN210071218U (en) | 2019-08-14 | 2019-08-14 | Impact-resistant piston type pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210071218U true CN210071218U (en) | 2020-02-14 |
Family
ID=69429808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921315538.6U Active CN210071218U (en) | 2019-08-14 | 2019-08-14 | Impact-resistant piston type pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210071218U (en) |
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2019
- 2019-08-14 CN CN201921315538.6U patent/CN210071218U/en active Active
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