CN221099947U - Pressure sensor for wide-range pressure measurement - Google Patents
Pressure sensor for wide-range pressure measurement Download PDFInfo
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- CN221099947U CN221099947U CN202420894106.XU CN202420894106U CN221099947U CN 221099947 U CN221099947 U CN 221099947U CN 202420894106 U CN202420894106 U CN 202420894106U CN 221099947 U CN221099947 U CN 221099947U
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- damper
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- 238000009530 blood pressure measurement Methods 0.000 title claims description 19
- 238000013016 damping Methods 0.000 claims abstract description 101
- 230000035939 shock Effects 0.000 claims description 4
- 230000004308 accommodation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to a pressure sensor for measuring wide-range pressure, belongs to the technical field of pressure sensors, and solves the problem that the existing pressure sensor is easy to damage due to medium pressure impact and excessive vibration and unstable pressure when the existing pressure sensor is used for measuring the wide-range pressure. The utility model comprises a pressure joint, a damper and a sensor core body, wherein the damper and the sensor core body are arranged in the pressure joint; the pressure connector is provided with a second accommodating cavity, and a buffer gap is arranged between the damper and the inner wall of the second accommodating cavity; the damper is provided with a medium leading-in hole, a first damping channel and a second damping channel, and the medium leading-in hole, the first damping channel, the second damping channel and the buffer gap are sequentially communicated and form a multiple damping structure; the utility model reduces the impact and vibration of the medium pressure through the multiple damping structure, and avoids the damage to the pressure sensor caused by unstable pressure due to overlarge impact and vibration of the medium pressure acting on the sensor core.
Description
Technical Field
The utility model relates to the technical field of pressure sensors, in particular to a pressure sensor for wide-range pressure measurement.
Background
The pressure sensor is widely applied to the fields of aerospace, automotive electronics, industrial control and the like, and can be divided into strain type, capacitance type, piezoresistive type and resonance type according to principles. The piezoresistive pressure chip based on MEMS (micro-mechanical system) has the characteristics of high precision, low cost and good stability. The piezoresistive chip is packaged into a pressure sensor core body after the process steps of bonding, gold wire bonding and the like, is used for being installed in the pressure sensor to finish the conversion of pressure signals and electric signals, and has the characteristics of simple structure and small volume.
In the measurement of wide-range pressure (the pressure is more than 15 MPa), the pressure inlet damping of the traditional pressure sensor is mostly of an elongated hole or a structure with a large diameter and a small diameter, and the damping effect is achieved by changing the flow area of a medium.
Disclosure of utility model
In view of the above analysis, the present utility model aims to provide a pressure sensor for wide-range pressure measurement, so as to solve the problem that the existing pressure sensor is easily damaged due to medium pressure impact and excessive vibration when performing wide-range pressure measurement.
The aim of the utility model is mainly realized by the following technical scheme:
A pressure sensor for wide range pressure measurement, comprising a pressure joint, a damper and a sensor core, the damper and the sensor core being mounted within the pressure joint, the damper for reducing pressure shock and vibration of a medium; the pressure connector is provided with a second accommodating cavity, and a buffer gap is arranged between the damper and the inner wall of the second accommodating cavity; the damper is provided with a medium introduction hole, a first damping channel and a second damping channel, wherein the medium introduction hole, the first damping channel, the second damping channel and a buffer gap are sequentially communicated, the first damping channel is used for carrying out first heavy damping on a medium, the second damping channel is used for carrying out second heavy damping on the medium, the buffer gap is used for carrying out third heavy damping on the medium, and the first damping channel, the second damping channel and the buffer gap form a multiple damping structure, so that pressure impact and vibration of the medium can be reduced for a plurality of times.
Further, the diameter of the first damping passage is smaller than the diameter of the medium introduction hole, so that pressure impact and vibration of the medium can be reduced by changing the flow area of the medium; the axis of the second damping channel is perpendicular to the axis of the first damping channel, so that pressure impact and vibration of the medium can be reduced by changing the flow direction of the medium; the medium outlet of the second damping channel is opposite to the inner wall of the second accommodating cavity, so that the buffer gap can change the flow direction and the flow area of the medium.
Further, the diameter of the second damping channel is smaller than the diameter of the first damping channel.
Further, the second damping channel is provided with a plurality of damping channels.
Further, the pressure connector is further provided with a first accommodating cavity and a third accommodating cavity, the first accommodating cavity, the second accommodating cavity and the third accommodating cavity are sequentially communicated, and the third accommodating cavity is used for installing the sensor core body.
Further, the pressure connector is further provided with a pressure guiding hole, and the pressure guiding hole is used for communicating the second accommodating cavity and the third accommodating cavity.
Further, the damper includes a first cylinder and a second cylinder.
Further, the first column is fixedly installed in the first accommodating cavity.
Further, the second column is located in the second accommodating cavity, and a buffer gap is formed between the cylindrical surface of the second column and the inner wall of the second accommodating cavity.
Further, the medium introduction hole and the first damping channel are both arranged on the first column; the second damping channel is arranged on the second column; the second damping channels are uniformly arranged on the second column along the circumference.
The technical scheme of the utility model can at least realize one of the following effects:
(1) The utility model discloses a pressure sensor for measuring wide-range pressure, which comprises a pressure joint, a damper and a sensor core body, wherein the damper and the sensor core body are arranged in the pressure joint, and the damper is used for reducing pressure impact and vibration of a medium; the pressure connector is provided with a second accommodating cavity, and a buffer gap is arranged between the damper and the inner wall of the second accommodating cavity; the damper is provided with a medium introduction hole, a first damping channel and a second damping channel, the medium introduction hole, the first damping channel, the second damping channel and a buffer gap are sequentially communicated, the first damping channel is used for carrying out first heavy damping on a medium, the second damping channel is used for carrying out second heavy damping on the medium, the buffer gap is used for carrying out third heavy damping on the medium, the first damping channel, the second damping channel and the buffer gap form a multiple damping structure, medium pressure impact and vibration are reduced through the multiple damping structure, the medium pressure impact and vibration acting on a sensor core are avoided, the pressure is unstable and the pressure sensor is damaged, and the stability and smoothness of the pressure sensor on large-range pressure measurement are improved.
(2) The second damping channels are uniformly arranged on the second column in circumference, and the medium in the first damping channel can be rapidly filled into the buffer gap by arranging the second damping channels, so that the medium can be rapidly contacted with the sensor core, the sensor core can rapidly sense pressure change of the medium, and the sensitivity of sensing of the pressure sensor is improved.
In the utility model, the technical schemes can be mutually combined to realize more preferable combination schemes. Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the utility model, like reference numerals being used to designate like parts throughout the drawings;
FIG. 1 is a cross-sectional view of a pressure sensor according to an embodiment of the present utility model;
FIG. 2 is a cross-sectional view of a pressure fitting according to an embodiment of the present utility model;
FIG. 3 is a schematic view of a damper according to an embodiment of the present utility model;
Fig. 4 is a cross-sectional view of a damper according to an embodiment of the present utility model.
Reference numerals:
1-a pressure joint; 11-a first accommodation chamber; 12-a second accommodation chamber; 13-a third accommodation chamber; 14-a pressure guiding hole; a 2-damper; 21-a first column; 211-medium introduction holes; 212-a first damping channel; 22-a second column; 221-a second damping channel; 3-sensor core.
Detailed Description
The following detailed description of preferred embodiments of the utility model is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the utility model, are used to explain the principles of the utility model and are not intended to limit the scope of the utility model.
Example 1
In one embodiment of the utility model, a pressure sensor for wide-range pressure measurement is disclosed, as shown in fig. 1, the pressure sensor comprises a pressure joint 1, a damper 2 and a sensor core 3, wherein the damper 2 and the sensor core 3 are sequentially arranged in the pressure joint 1, and the pressure joint 1 is used for being connected with an external structure or equipment to be measured; the damper 2 is used for reducing pressure impact and vibration of a medium entering the pressure sensor, so that damage caused by overlarge pressure impact and vibration of the medium and unstable pressure when the sensor core 3 is in contact with the medium is avoided; the sensor core 3 is used for sensing the medium pressure after the pressure impact and vibration are sufficiently reduced, so that the wide-range pressure is monitored.
Preferably, as shown in fig. 2, the pressure joint 1 is provided with a first accommodating cavity 11, a second accommodating cavity 12 and a third accommodating cavity 13, the first accommodating cavity 11, the second accommodating cavity 12 and the third accommodating cavity 13 are sequentially communicated, the first accommodating cavity 11 and the second accommodating cavity 12 are used for installing the damper 2, and the third accommodating cavity 13 is used for installing the sensor core 3.
Preferably, the pressure connector 1 is further provided with a pressure guiding hole 14, and the pressure guiding hole 14 is used for communicating the second accommodating cavity 12 and the third accommodating cavity 13, so that the medium filled in the second accommodating cavity 12 after pressure impact and vibration are reduced can be introduced into the third accommodating cavity 13, and the medium after pressure impact and vibration is fully reduced is contacted with the pressure sensor core 3.
Preferably, as shown in fig. 3, the damper 2 includes a first cylinder 21 and a second cylinder 22, and the first cylinder 21 and the second cylinder 22 are coaxially disposed; the first column 21 is fixedly arranged in the first accommodating cavity 11; the second column 22 is located in the second accommodating chamber 12, and a gap is formed between the cylindrical surface of the second column 22 and the inner wall of the second accommodating chamber 12, and the gap is a buffer gap.
Preferably, as shown in fig. 4, the first cylinder 21 is provided with a medium introducing hole 211 and a first damping channel 212, the medium introducing hole 211 and the first damping channel 212 are communicated, and the axis of the medium introducing hole 211 and the axis of the first damping channel 212 are parallel to the axis of the first cylinder 21, and the medium introducing hole 211 is used for introducing the medium in an external structure or device into the first damping channel 212; the diameter of the first damping channel 212 is smaller than that of the medium introduction hole 211, and the pressure impact and vibration of the medium are reduced by changing the flow area of the medium, so that the medium entering the pressure sensor is subjected to first heavy damping.
Preferably, the second cylinder 22 is provided with a second damping channel 221, and a medium inlet of the second damping channel 221 is communicated with a medium outlet of the first damping channel 212; the axis of the second damping channel 221 extends along the radial direction of the second cylinder 22, that is, the axis of the second damping channel 221 is perpendicular to the axis of the first damping channel 212, the medium after pressure impact and vibration is reduced by the first damping channel 212 flows into the second damping channel 221, the medium impacts on the inner wall of the second damping channel 221 to buffer, and then the flowing direction is changed, so that the pressure impact and vibration of the medium are further reduced, and the second damping of the medium entering the pressure sensor is realized.
Preferably, the diameter of the second damping channel 221 is smaller than that of the first damping channel 212, and the pressure shock and vibration of the medium can be further reduced by changing the flow area of the medium again.
Preferably, the medium outlet of the second damping channel 221 is communicated with the buffer gap, the medium after pressure impact and vibration is further reduced through the second damping channel 221 and flows into the buffer gap, the medium impacts on the inner wall of the second accommodating cavity 12 to buffer, then the flowing direction of the medium is changed again, the medium is filled in the buffer gap, and the flow area of the medium is changed again, so that the pressure impact and vibration of the medium are reduced again, and the third triple damping of the medium entering the pressure sensor is realized.
Compared with the prior art, the pressure sensor in the embodiment is provided with the damper 2, so that the medium introducing hole 211, the first damping channel 212, the second damping channel 221 and the buffer gap are sequentially communicated, a multiple damping structure is formed, pressure impact and vibration of a medium are reduced for many times through the multiple damping structure, the pressure impact and vibration of the medium acting on the sensor core body 3 can be avoided, the pressure is unstable and the pressure sensor is damaged, and the stability and smoothness of the pressure sensor to large-range pressure measurement are improved.
Preferably, the second damping channels 221 are provided with a plurality of second damping channels 221, and the plurality of second damping channels 221 are uniformly arranged on the second column 22 along the circumference, and by arranging the plurality of second damping channels 221, the medium in the first damping channel 212 can be rapidly filled into the buffer gap, so that the medium can be rapidly contacted with the sensor core 3, the sensor core 3 can rapidly sense pressure change of the medium, and the sensitivity of the sensing of the pressure sensor is improved.
The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model.
Claims (10)
1. A pressure sensor for wide range pressure measurement, characterized by comprising a pressure joint (1), a damper (2) and a sensor core (3), wherein the damper (2) and the sensor core (3) are arranged in the pressure joint (1), and the damper (2) is used for reducing pressure impact and vibration of a medium;
A second accommodating cavity (12) is formed in the pressure joint (1), and a buffer gap is formed between the damper (2) and the inner wall of the second accommodating cavity (12);
Be equipped with medium introduction hole (211), first damping passageway (212) and second damping passageway (221) on attenuator (2), medium introduction hole (211), first damping passageway (212), second damping passageway (221) and buffer clearance communicate in proper order, first damping passageway (212) are used for carrying out first heavy damping to the medium, second damping passageway (221) are used for carrying out the second heavy damping to the medium, buffer clearance is used for carrying out third heavy damping to the medium, first damping passageway (212), second damping passageway (221) and buffer clearance constitute multiple damping structure, can reduce the pressure shock and the vibration of medium many times.
2. A pressure sensor for wide range pressure measurement according to claim 1, characterized in that the diameter of the first damping channel (212) is smaller than the diameter of the medium introduction hole (211), the pressure shock and vibration of the medium can be reduced by changing the flow area of the medium; the axis of the second damping channel (221) is perpendicular to the axis of the first damping channel (212), so that pressure impact and vibration of the medium can be reduced by changing the flow direction of the medium; the medium outlet of the second damping channel (221) is opposite to the inner wall of the second accommodating cavity (12), so that the flow direction and the flow area of the medium can be changed by the buffer gap.
3. A pressure sensor for wide range pressure measurement according to claim 2, characterized in that the diameter of the second damping channel (221) is smaller than the diameter of the first damping channel (212).
4. A pressure sensor for wide range pressure measurement according to claim 3, characterized in that the second damping channel (221) is provided with a plurality.
5. A pressure sensor for wide range pressure measurement according to claim 4, characterized in that the pressure joint (1) is further provided with a first accommodating chamber (11) and a third accommodating chamber (13), the first accommodating chamber (11), the second accommodating chamber (12) and the third accommodating chamber (13) are sequentially communicated, and the third accommodating chamber (13) is used for mounting the sensor core (3).
6. A pressure sensor for wide range pressure measurement according to claim 5, characterized in that the pressure joint (1) is further provided with a pressure guiding hole (14), the pressure guiding hole (14) being adapted to communicate the second receiving chamber (12) with the third receiving chamber (13).
7. A pressure sensor for wide range pressure measurement according to claim 6, characterized in that the damper (2) comprises a first cylinder (21) and a second cylinder (22).
8. A pressure sensor for wide range pressure measurement according to claim 7, characterized in that the first cylinder (21) is fixedly mounted in the first receiving chamber (11).
9. A pressure sensor for wide range pressure measurement according to claim 8, characterized in that the second cylinder (22) is located in the second receiving chamber (12) with a buffer gap between the cylindrical surface of the second cylinder (22) and the inner wall of the second receiving chamber (12).
10. A pressure sensor for wide range pressure measurement according to claim 9, characterized in that the medium introduction hole (211) and the first damping channel (212) are both provided on the first cylinder (21); the second damping channel (221) is arranged on the second column (22); the plurality of second damping channels (221) are uniformly arranged on the second column (22) along the circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420894106.XU CN221099947U (en) | 2024-04-28 | 2024-04-28 | Pressure sensor for wide-range pressure measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420894106.XU CN221099947U (en) | 2024-04-28 | 2024-04-28 | Pressure sensor for wide-range pressure measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221099947U true CN221099947U (en) | 2024-06-07 |
Family
ID=91326789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420894106.XU Active CN221099947U (en) | 2024-04-28 | 2024-04-28 | Pressure sensor for wide-range pressure measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221099947U (en) |
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2024
- 2024-04-28 CN CN202420894106.XU patent/CN221099947U/en active Active
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