CN203880406U - Internally-arranged infrasonic wave sensor of pipeline - Google Patents
Internally-arranged infrasonic wave sensor of pipeline Download PDFInfo
- Publication number
- CN203880406U CN203880406U CN201420165006.XU CN201420165006U CN203880406U CN 203880406 U CN203880406 U CN 203880406U CN 201420165006 U CN201420165006 U CN 201420165006U CN 203880406 U CN203880406 U CN 203880406U
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- CN
- China
- Prior art keywords
- piezoelectric element
- infrasonic
- built
- mass block
- pipeline
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 4
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 230000008054 signal transmission Effects 0.000 abstract 3
- 239000012530 fluid Substances 0.000 description 3
- 230000036039 immunity Effects 0.000 description 3
- 230000010358 mechanical oscillation Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The utility model discloses an internally-arranged infrasonic wave sensor of a pipeline. The sensor comprises a sealed shell, a base, a mass block, a first piezoelectric element, a second piezoelectric element, an infrasonic wave detection circuit and two signal transmission lines. The sealed shell is hollow, the base is fixed in the shell, the first piezoelectric element is fixed to the upper portion of the base, the mass block is further fixed to the upper portion of the first piezoelectric element, a space allowing the mass block to move in the vertical direction is reserved between the mass block and the top of the shell, and the second piezoelectric element is fixedly connected with the lower portion of the base and the bottom of the shell. The infrasonic wave detection circuit is arranged on the outer side of the shell, the two signal transmission lines are electrically connected with the first piezoelectric element and the second piezoelectric element respectively, and the two signal transmission lines both penetrate out of the shell and are electrically connected to the infrasonic wave detection circuit. The internally-arranged infrasonic wave sensor of the pipeline is simple in structure, high in sensitivity, strong in anti-interference performance and stable in output.
Description
Technical field
The utility model relates to built in pipeline infrasonic sensor.
Background technique
The leakage of pipeline inner fluid medium can produce infrasonic wave, and the velocity of propagation of infrasonic wave in oil and gas is all higher than airborne velocity of propagation.Existing built in pipeline infrasonic sensor, leaks the infrasonic wave signal producing by receiving pipeline inner fluid, realize the warning of leakage point.But the infrasonic sensor of existing built in pipeline, when receiving pipeline inner fluid leaks the infrasonic wave signal producing, due to the impact of mechanical vibration that infrasonic sensor itself produces, to the infrasonic wave signal generation interference that receives and export, make the sensitivity of infrasonic sensor low.And the inner electrical signal producing of infrasonic sensor, in the process being transferred to outside pipeline, is especially easily affected.
Model utility content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, provides a kind of simple in structure, highly sensitive, strong interference immunity, the built in pipeline infrasonic sensor of stable output.
The technological scheme that the utility model provides is:
Built in pipeline infrasonic sensor, comprising:
The housing of sealing, its inner hollow;
Pedestal, it is fixed on the inside of described housing;
Mass block;
The first piezoelectric element and the second piezoelectric element;
Wherein, the first piezoelectric element is fixed on the top of described pedestal, described mass block is also fixed on the top of described the first piezoelectric element, and between described mass block and the top of described housing, remain with one and supply described mass block that the space of movement vertically occurs, the second piezoelectric element is fixedly connected with the bottom of described pedestal and the bottom of described housing;
Infrasonic wave testing circuit, it is arranged on the outside of described housing;
Two signal transmssion lines, are electrically connected to respectively the first piezoelectric element and the second piezoelectric element, and two signal transmssion lines all pass described housing and are electrically connected to described infrasonic wave testing circuit;
Wherein, described infrasonic wave testing circuit is used for the electrical signal that comes from described the second piezoelectric element to deduct the electrical signal that comes from described the first piezoelectric element, thereby exports infrasonic response electrical signal.
Preferably, in described built in pipeline formula infrasonic sensor, the bottom of described housing comprise bottom body and be positioned at described bottom body intermediate portion to projecting inward protuberance, described protuberance and described bottom body are formed in one or are fixed together; Described the second piezoelectric element is fixedly connected with described protuberance.
Preferably, in described built in pipeline formula infrasonic sensor, described mass block is that metallic material is made.
Preferably, in described built in pipeline formula infrasonic sensor, the top of described housing offers the first through hole, described pedestal is provided with the second through hole of perforation, be connected to the signal transmssion line of the second piezoelectric element successively by the second through hole and the first through hole, the signal transmssion line that is connected to the first piezoelectric element passes through by the first through hole; Described the first through hole is in closed state.
Preferably, in described built in pipeline formula infrasonic sensor, described infrasonic wave testing circuit also comprises:
Differential amplifier circuit, it has two input ends, is electrically connected respectively with two signal transmssion lines;
Bandwidth-limited circuit, it is electrically connected with the output terminal of differential amplifier circuit;
DC/DC conversion circuit, it gives described differential amplifier circuit and the power supply of described bandwidth-limited circuit.
Preferably, in described built in pipeline formula infrasonic sensor, also comprise:
Anticorrosive coat, it is coated in the outside of described housing.
Built in pipeline infrasonic sensor described in the utility model, simple in structure, highly sensitive, strong interference immunity, stable output.In the utility model, two piezoelectric elements are arranged on to the two ends up and down of pedestal, and pedestal is fixed on housing, increase the stability of infrasonic sensor internal structure, reduce the error of the mechanical oscillation signal of two piezoelectric element receptions, be conducive to the detection of infrasonic wave signal, strong interference immunity, the sensitivity that has improved infrasonic sensor.First through hole on the top of housing; the second through hole on pedestal; the signal transmssion line of two piezoelectric elements is played to protection, jamproof effect; make the electrical signal of piezoelectric element output stable; and infrasonic sensor internal structure compact in design; space rationally utilizes, and is conducive to the microminiaturization development of infrasonic sensor, mass production.
Brief description of the drawings
Fig. 1 is the structural representation of built in pipeline infrasonic sensor described in the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, to make those skilled in the art can implement according to this with reference to specification word.
As shown in Figure 1, the utility model provides built in pipeline infrasonic sensor, comprising: the housing 1 of sealing, its inner hollow; Pedestal 2, it is fixed on the inside of described housing; Mass block 3; The first piezoelectric element 4 and the second piezoelectric element 5; Wherein, the first piezoelectric element 4 is fixed on the top of pedestal 2, mass block 3 is also fixed on the top of the first piezoelectric element 4, and between the top of mass block 3 and housing 1, remain with one and supply mass block 3 that the space of movement vertically occurs, the second piezoelectric element 5 is fixedly connected with the bottom of pedestal 2 and the bottom of housing 1; Infrasonic wave testing circuit, it is arranged on the outside of housing 1; Two signal transmssion lines 6, are electrically connected to respectively the first piezoelectric element 4 and 5, two signal transmssion lines 6 of the second piezoelectric element all pass described housing and are electrically connected to infrasonic wave testing circuit; Wherein, infrasonic wave testing circuit is used for the electrical signal that comes from described the second piezoelectric element to deduct the electrical signal that comes from described the first piezoelectric element, thereby exports infrasonic response electrical signal.
The bottom of housing 1 comprise bottom body and be positioned at described bottom body intermediate portion to projecting inward protuberance, protuberance and bottom body are formed in one or are fixed together; The second piezoelectric element 5 is fixedly connected with protuberance.
Mass block is that metallic material is made.
The top of housing 1 offers the first through hole, pedestal 2 is provided with the second through hole 21 of perforation, be connected to the signal transmssion line of the second piezoelectric element 5 successively by the second through hole 22 and the first through hole 21, the signal transmssion line that is connected to the first piezoelectric element 4 passes through by the first through hole 21; The first through hole 21 is in closed state.
Infrasonic wave testing circuit also comprises: differential amplifier circuit, and it has two input ends, is electrically connected respectively with two signal transmssion lines; Bandwidth-limited circuit, it is electrically connected with the output terminal of differential amplifier circuit; DC/DC conversion circuit, it gives described differential amplifier circuit and the power supply of described bandwidth-limited circuit.
Built in pipeline formula infrasonic sensor also comprises: anticorrosive coat, it is coated in the outside of described housing.Increase the corrosion resistance of built in pipeline infrasonic sensor.
Pedestal and housing are fixed, and the error of the mechanical oscillation signal that the piezoelectric element at the upper and lower two ends of pedestal receives is reduced, and have improved the sensitivity of infrasonic sensor.
Built in pipeline infrasonic sensor simplicity of design is reasonable, integral layout compactness, good stability.
Utilize differential amplifier circuit that the mechanical oscillation signal of two piezoelectric element outputs is eliminated, only amplify the output of infrasonic wave signal by bandwidth-limited circuit.
Although embodiment of the present utility model is open as above, but it is not restricted to listed utilization in specification and mode of execution, it can be applied to the various fields of the present utility model that are applicable to completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the utility model is not limited to specific details and illustrates here and the legend of describing.
Claims (6)
1. built in pipeline infrasonic sensor, is characterized in that, comprising:
The housing of sealing, its inner hollow;
Pedestal, it is fixed on the inside of described housing;
Mass block;
The first piezoelectric element and the second piezoelectric element;
Wherein, the first piezoelectric element is fixed on the top of described pedestal, described mass block is also fixed on the top of described the first piezoelectric element, and between described mass block and the top of described housing, remain with one and supply described mass block that the space of movement vertically occurs, the second piezoelectric element is fixedly connected with the bottom of described pedestal and the bottom of described housing;
Infrasonic wave testing circuit, it is arranged on the outside of described housing;
Two signal transmssion lines, are electrically connected to respectively the first piezoelectric element and the second piezoelectric element, and two signal transmssion lines all pass described housing and are electrically connected to described infrasonic wave testing circuit;
Wherein, described infrasonic wave testing circuit is used for the electrical signal that comes from described the second piezoelectric element to deduct the electrical signal that comes from described the first piezoelectric element, thereby exports infrasonic response electrical signal.
2. built in pipeline formula infrasonic sensor as claimed in claim 1, it is characterized in that, the bottom of described housing comprise bottom body and be positioned at described bottom body intermediate portion to projecting inward protuberance, described protuberance and described bottom body are formed in one or are fixed together; Described the second piezoelectric element is fixedly connected with described protuberance.
3. built in pipeline formula infrasonic sensor as claimed in claim 2, is characterized in that, described mass block is that metallic material is made.
4. built in pipeline formula infrasonic sensor as claimed in claim 2 or claim 3, it is characterized in that, the top of described housing offers the first through hole, described pedestal is provided with the second through hole of perforation, be connected to the signal transmssion line of the second piezoelectric element successively by the second through hole and the first through hole, the signal transmssion line that is connected to the first piezoelectric element passes through by the first through hole; Described the first through hole is in closed state.
5. built in pipeline formula infrasonic sensor as claimed in claim 2 or claim 3, is characterized in that, described infrasonic wave testing circuit also comprises:
Differential amplifier circuit, it has two input ends, is electrically connected respectively with two signal transmssion lines;
Bandwidth-limited circuit, it is electrically connected with the output terminal of differential amplifier circuit;
DC/DC conversion circuit, it gives described differential amplifier circuit and the power supply of described bandwidth-limited circuit.
6. built in pipeline formula infrasonic sensor as claimed in claim 5, is characterized in that, also comprises:
Anticorrosive coat, it is coated in the outside of described housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420165006.XU CN203880406U (en) | 2014-04-04 | 2014-04-04 | Internally-arranged infrasonic wave sensor of pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420165006.XU CN203880406U (en) | 2014-04-04 | 2014-04-04 | Internally-arranged infrasonic wave sensor of pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203880406U true CN203880406U (en) | 2014-10-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420165006.XU Expired - Lifetime CN203880406U (en) | 2014-04-04 | 2014-04-04 | Internally-arranged infrasonic wave sensor of pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203880406U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108758360A (en) * | 2018-06-05 | 2018-11-06 | 北京目黑科技有限公司 | A kind of infrasound sensor and electronic equipment |
| CN117870974A (en) * | 2024-01-15 | 2024-04-12 | 中国特种设备检测研究院 | Low-frequency acoustic emission sensor for pipeline leakage detection and application method thereof |
-
2014
- 2014-04-04 CN CN201420165006.XU patent/CN203880406U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108758360A (en) * | 2018-06-05 | 2018-11-06 | 北京目黑科技有限公司 | A kind of infrasound sensor and electronic equipment |
| CN117870974A (en) * | 2024-01-15 | 2024-04-12 | 中国特种设备检测研究院 | Low-frequency acoustic emission sensor for pipeline leakage detection and application method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141015 |
|
| CX01 | Expiry of patent term |