CN201514275U - high-sensitivity contact-type vibration monitoring piezoelectric sensor - Google Patents
high-sensitivity contact-type vibration monitoring piezoelectric sensor Download PDFInfo
- Publication number
- CN201514275U CN201514275U CN200920205385XU CN200920205385U CN201514275U CN 201514275 U CN201514275 U CN 201514275U CN 200920205385X U CN200920205385X U CN 200920205385XU CN 200920205385 U CN200920205385 U CN 200920205385U CN 201514275 U CN201514275 U CN 201514275U
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- sensing element
- vibration monitoring
- piezoelectric sensor
- high sensitivity
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Abstract
The utility model is applied to the field of sensors, and provides a high-sensitivity contact-type vibration monitoring piezoelectric sensor, comprising a contact vibration transitive head, a piezoelectric diaphragm sensing element, a signal leading-out part and a fixing part, wherein the contact vibration transitive head is tightly connected with the piezoelectric diaphragm sensing element to form a combined body, the periphery of the combined body is fixed by the fixing part, and the piezoelectric diaphragm sensing element is electrically connected with the signal leading-out part. When in use, the head part of the contact vibration transitive head is in contact with the object to be tested, and the vibration of the object to be tested is transferred to the piezoelectric diaphragm sensing element through the contact vibration transitive head, thus realizing the online monitoring on the vibration of the object. The utility model can be suitable for different vibration forms and different monitoring environment, and has low cost and high sensitivity.
Description
Technical field
The utility model belongs to sensor field, relate in particular to a kind of high sensitivity contact vibration monitoring piezoelectric sensor, it can be applied in conventional vibration monitoring, particularly vibrates under the fainter situation, also can be applied in and make electronic auscultation device in the medical science, as measuring pulse etc.
Background technology
Have at present much about vibration monitoring method, as the disclosed a kind of piezoelectric vibration sensors of Chinese patent ZL93247606.6, it has adopted T type structure to add steel ball, structure is complicated, and because the position of steel ball is indefinite, consistance is relatively poor; And for example publication number is the piezoelectric type vibration transducer of introducing among the CN 1603841A, because the piezoelectric membrane sensing element is unsettled in a housing of opening, the vibration of monitored object passes to housing by housing, pass to the piezoelectric membrane sensing element by housing then, through transmission repeatedly, signal can be decayed a lot, and for some faint vibrations, the sensitivity meeting of its monitoring is very low; The vibration transducer of the disclosed employing piezoceramic material making of Chinese patent CN101135658A is discerned the method for water boiling point for another example, this method can monitor water temperature and be higher than vibration after 70 ℃, because the vibration of this moment is stronger, and can not monitor less than 70 ℃ of weak vibration signals before for water temperature, as seen the monitoring sensitivity of this method is not high, the pressure sensitivity material of this method employing is a piezoelectric ceramics in addition, itself poor processability, flexible bad, install inconvenient, and price is expensive, makes its range of application that significant limitation be arranged.
The utility model content
The purpose of this utility model is to provide a kind of piezoelectric sensor that is suitable for industrialization production, height with low cost, sensitive, is suitable for different vibration modes and different monitoring of environmental.
The utility model is to realize like this, a kind of high sensitivity contact vibration monitoring piezoelectric sensor, comprise that a contact shaking head, a piezoelectric membrane sensing element, a signal draw a part and a fixture, described contact shaking head and piezoelectric membrane sensing element closely connect into an assembly, the periphery of described assembly is fixed by described fixture, and described piezoelectric membrane sensing element is drawn part with described signal and is electrically connected.
Particularly, the elastic body of described contact shaking head for making by silica gel or rubber, the head of described contact shaking head and bottom are arc or planar shaped.
Particularly, described piezoelectric membrane sensing element is made up of Kynoar (PVDF) macromolecule membrane and conductive layer.
Particularly, described piezoelectric membrane sensing element adopts the self-shileding structure, and its surface-coated has the multilayer conductive material, outer wrapping inner layer, and outer field conductive material short circuit.
Particularly, adopt cementing agent closely to connect into an assembly between described piezoelectric membrane sensing element and the contact shaking head, described cementing agent is silica gel or rubber.
Particularly, described signal is drawn part and is comprised two-terminal and two lead-in wires, described terminal and the crimping of piezoelectric membrane sensing element, described lead-in wire and terminal welding.
Perhaps, described signal is drawn part and is comprised a pcb board and two lead-in wires, described pcb board and the crimping of piezoelectric membrane sensing element, described lead-in wire and pcb board welding.
Particularly, described fixture is made up of a upper casing and a lower casing, is provided with an avoiding hollow groove and two boss that are positioned at described avoiding hollow groove two ends in the described lower casing, and described assembly is unsettled to be located on the described avoiding hollow groove; The edge of described assembly is fixed by the boss in described upper casing and the described lower casing.
Perhaps, described fixture is pcb board holder, five metals holder or the plastic cement holder that the edge of described assembly can be fixed.
Also or, described fixture be can the edge of described assembly is fixing screw, rivet, compressing tablet or briquetting.
During use, the head of contact shaking head contacts with testee, the vibration of testee passes to the piezoelectric membrane sensing element by the contact shaking head, thereby realize on-line monitoring to object vibration, the utility model can be suitable for different vibration modes and different monitoring of environmental, and is with low cost, sensitive high.
Description of drawings
Fig. 1 is the principle schematic of the piezoelectric sensor that provides of the utility model embodiment;
Fig. 2 A is the right cut-open view of the piezoelectric sensor structure that provides of the utility model embodiment;
Fig. 2 B is the main cut-open view of the piezoelectric sensor structure that provides of the utility model embodiment;
Fig. 3 is the piezoelectric membrane sensing element that provides of the utility model embodiment and the connection diagram of terminal and lead;
Fig. 4 A is the self-shileding structural representation of the employing multilayer conductive material that provides of the utility model embodiment;
Fig. 4 B is the self-shileding structural representation of the employing individual layer doubling that provides of the utility model embodiment;
Fig. 5 A is the contact shaking head structural representation that the utility model embodiment provides;
Fig. 5 B is another contact shaking head structural representation that the utility model embodiment provides;
Fig. 5 C is another contact shaking head structural representation that the utility model embodiment provides;
Fig. 6 A is the contact shaking head that provides of the utility model embodiment and the connection diagram of piezoelectric membrane sensing element;
Fig. 6 B is the right view of Fig. 6 A;
Fig. 7 is the inner structure synoptic diagram of the shell that provides of the utility model embodiment;
Fig. 8 is the inner structure synoptic diagram of the base that provides of the utility model embodiment;
Fig. 9 is that the piezoelectric sensor that the utility model embodiment provides is used to monitor the schematic diagram that electromagnetic oven boils water.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
As shown in Figure 1, the high sensitivity contact vibration monitoring piezoelectric sensor that the utility model provides, comprise that a contact shaking head 1, a piezoelectric membrane sensing element 2, a signal draw a part 3 and a fixture 4, described contact shaking head 1 closely connects into an assembly with piezoelectric membrane sensing element 2, the periphery of described assembly is fixed by described fixture 4, and described piezoelectric membrane sensing element 2 is drawn part 3 with described signal and is electrically connected.During use, the head of contact shaking head 1 contacts with testee, the vibration of testee passes to piezoelectric membrane sensing element 2 by contact shaking head 1, thereby realize on-line monitoring to object vibration, the utility model can be suitable for different vibration modes and different monitoring of environmental, and is with low cost, sensitive high.
Below the utility model is elaborated.
Shown in Fig. 3, Fig. 4 A, the electric charge lead-out mode of described piezoelectric membrane sensing element 2 is as follows: described piezoelectric membrane sensing element 2 is made up of Kynoar (PVDF) macromolecule membrane and conductive layer, and adopt as Fig. 4 A self-shileding structure, in its surface-coated the multilayer conductive material is arranged, outer wrapping inner layer, and outer field conductive material short circuit.Described signal is drawn part 3 and is comprised two-terminal 31 and two lead-in wires 32, described terminal 31 and 2 crimping of piezoelectric membrane sensing element, described lead-in wire 32 and terminal 31 welding.Said structure and annexation are specially: described piezoelectric membrane sensing element 2 is by the 2a layer, the 2b layer, the 2c layer, the 2d layer, the 2e layer is formed, at first at the upper and lower surface silk-screen silver powder of 2b layer, form negative pole 2a layer and anodal 2c layer, attention is when design, the perform region of 2a layer is slightly larger than the perform region of 2c layer, then stick a layer insulating 2d layer with double faced adhesive tape at 2c layer another side, then on the 2d layer again silk-screen one deck silver powder form the 2e layer, the shape of this 2e layer and 2a layer are similar, and requirement can cover the 2c layer fully, pass through terminal 31 at last with 2e layer and the conducting of 2a layer, thereby form shielding the 2c layer; Then, terminal 31 is crimped onto on the piezoelectric membrane sensing element 2, again lead 32 is welded on the terminal 31, promptly realized the purpose that the electric charge of piezoelectric membrane sensing element 2 is drawn.
Should be appreciated that described signal draws part 3 and also can be made up of a pcb board (not shown) and two lead-in wire (not shown)s, described pcb board and 2 crimping of piezoelectric membrane sensing element, described lead-in wire and pcb board weld.In addition, described piezoelectric membrane sensing element 2 also can adopt the self-shileding structure of the employing individual layer doubling shown in Fig. 4 B, and this piezoelectric membrane sensing element 2 is made up of 2a layer, 2b layer, 2c layer, and doubling gets final product then, also belongs to protection domain of the present utility model.
As Fig. 2 A, Fig. 2 B, Fig. 5 A, shown in Fig. 6 A and Fig. 6 B, connected mode between described contact shaking head 1 and the piezoelectric membrane sensing element 2 is as follows: in the present embodiment, the elastic body of described contact shaking head 1 for making by silica gel or rubber, the head of described contact shaking head 1 and bottom are arc or planar shaped, adopt cementing agent tight bond such as silica gel or rubber to become an assembly between described piezoelectric membrane sensing element 2 and the contact shaking head 1, be specially: the head 1a of contact shaking head 1 adopts the spherical structure shown in Fig. 5 A, the bottom 1b of contact shaking head 1 adopts arcuate structure, the curved portions 22 of bottom 1b and piezoelectric membrane sensing element 2 is complementary and adopts silica gel or rubber bonding, the edge 1c of contact shaking head 1 and the edge 21 of piezoelectric membrane sensing element 2 also adopt silica gel or rubber bound, thereby make both become an assembly, can reduce or avoid the decay of signal in transmittance process like this.H shown in Fig. 6 B is the thickness at both edges, and dash area is both calmodulin binding domain CaMs among Fig. 6 A.Should be appreciated that described contact shaking head 1 head 1a also can be (shown in Fig. 5 B) on plane, the bottom 1b of described contact shaking head 1 also can make (shown in Fig. 5 C) on plane, all belongs to protection domain of the present utility model.
As Fig. 2 A, Fig. 2 B, Fig. 7 and shown in Figure 8, the general assembly mode of piezoelectric sensor of the present utility model is as follows: described fixture 4 is made up of a upper casing 41 and a lower casing 42, be provided with an avoiding hollow groove 421 and two boss 422 that are positioned at described avoiding hollow groove 421 two ends in the described lower casing 42, described assembly is unsettled to be located on the described avoiding hollow groove 421; The edge of described assembly is fixed by the boss 422 in described upper casing 41 and the described lower casing 42.Concrete assembling process is: at first, contact shaking head 1 that bonds together and the subassembly that piezoelectric membrane sensing element 2 forms are put into upper casing 41, wherein the circular hole 411 in the middle of the upper casing 41 play the guiding role, four square boss 412 of upper casing 41 play the role of positioning, and compress contact shaking head 1 and upper casing 41; Then, lower casing 42 is installed on the upper casing 41 four guideposts, 423 alignment of wherein said square boss 412 and lower casing 42, play the guide-localization effect, buckle 413 on the upper casing 41 and 424 butt joints of the buckle on the lower casing 42 play the connection effect, and this connection are non-removable.Have be very important in whole assembling process at 2: first is after upper casing 41 and lower casing 42 assemblings are finished, distance H (shown in Fig. 2 A) between the upper surface of the boss 422 on the lower casing 42 and the inside surface of upper casing 41 is less than the thickness sum h (shown in Fig. 6 B) at the edge of the edge 1c of contact shaking head 1 and piezoelectric membrane sensing element 2, both differences are 0.3mm, the inside surface of boss 422 and upper casing 41 can be pushed down the edge 1c of contact shaking head 1 tightly like this, guarantee when axial deformation takes place contact shaking head 1, the edge 1c of contact shaking head 1 does not have transversely deforming or very little, be to be understood that, the fixed form at the edge of assembly can be to be completely fixed, it also can be partial fixing, or the part limit at edge, face is fixed, and the shape at edge can be an arbitrary shape; Second is between the curved portions 425 in the curved portions 22 of piezoelectric membrane sensing element 2 and the lower casing 42 certain clearance to be arranged, and guarantees that piezoelectric membrane sensing element 2 Shi Buhui that deforms produces interference with lower casing 42.Finish after the general assembly of piezoelectric sensor, just can be installed to the monitoring of vibrating on the testee.
Perhaps, described fixture 4 also can adopt pcb board holder, five metals holder or the plastic cement holder that the edge of described assembly can be fixed.Especially, when adopting the pcb board holder, this pcb board holder not only plays the effect that is fixed the assembly edge, can also directly be crimped on piezoelectric membrane sensing element 2, connect lead at pcb board then, lead can be connected with the vibration-testing circuit of outside; Can certainly directly vibration-testing be set with circuit component and lead, can monitor the vibration of testee at pcb board.
Also or, described fixture 4 also can be screw, rivet, compressing tablet or the briquetting that the edge of described assembly is fixing.
As shown in Figure 9, boiling water with electromagnetic oven is the principle of work that example illustrates piezoelectric sensor, piezoelectric sensor is fixed in the electromagnetic oven, the head 1a of contact shaking head 1 contacts with the bottom surface of the ceramic panel 5 of electromagnetic oven, for transmitting vibrations signal better, must guarantee that both contact fully, so the head 1a of contact shaking head 1 will be by precompression 0.2mm when mounted, the container 6 that the top placement of ceramic panel 5 is heated up water, when water is heated, because the thermal motion of hydrone makes container 6 produce faint vibration, these vibration signals pass to contact shaking head 1 by ceramic panel 5, and contact shaking head 1 is one with piezoelectric membrane sensing element 2, and piezoelectric membrane sensing element 2 orders about down at vibration signal and produces piezoelectric effect, just can monitor the whole process of heating up water at an easy rate in real time through follow-up signal Processing.Record by experiment, water open and the output signal when beginning to heat up water after treatment, its ratio so just can judge very accurately all more than 3 whether water boiled.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. high sensitivity contact vibration monitoring piezoelectric sensor, comprise that a contact shaking head, a piezoelectric membrane sensing element, a signal draw a part and a fixture, it is characterized in that: described contact shaking head and piezoelectric membrane sensing element closely connect into an assembly, the periphery of described assembly is fixed by described fixture, and described piezoelectric membrane sensing element is drawn part with described signal and is electrically connected.
2. a kind of high sensitivity contact vibration monitoring piezoelectric sensor as claimed in claim 1 is characterized in that: the elastic body of described contact shaking head for being made by silica gel or rubber, the head of described contact shaking head and bottom are arc or planar shaped.
3. a kind of high sensitivity contact vibration monitoring piezoelectric sensor as claimed in claim 1, it is characterized in that: described piezoelectric membrane sensing element is made up of Kynoar (PVDF) macromolecule membrane and conductive layer.
4. a kind of high sensitivity contact vibration monitoring piezoelectric sensor as claimed in claim 1, it is characterized in that: described piezoelectric membrane sensing element adopts the self-shileding structure, its surface-coated has the multilayer conductive material, outer wrapping inner layer, and outer field conductive material short circuit.
5. a kind of high sensitivity contact vibration monitoring piezoelectric sensor as claimed in claim 1 is characterized in that: adopt cementing agent closely to connect into an assembly between described piezoelectric membrane sensing element and the contact shaking head, described cementing agent is silica gel or rubber.
6. a kind of high sensitivity contact vibration monitoring piezoelectric sensor as claimed in claim 1, it is characterized in that: described signal is drawn part and is comprised two-terminal and two lead-in wires, described terminal and the crimping of piezoelectric membrane sensing element, described lead-in wire and terminal welding.
7. a kind of high sensitivity contact vibration monitoring piezoelectric sensor as claimed in claim 1, it is characterized in that: described signal is drawn part and is comprised a pcb board and two lead-in wires, described pcb board and the crimping of piezoelectric membrane sensing element, described lead-in wire and pcb board welding.
8. a kind of high sensitivity contact vibration monitoring piezoelectric sensor as claimed in claim 1, it is characterized in that: described fixture is made up of a upper casing and a lower casing, be provided with an avoiding hollow groove and two boss that are positioned at described avoiding hollow groove two ends in the described lower casing, described assembly is unsettled to be located on the described avoiding hollow groove; The edge of described assembly is fixed by the boss in described upper casing and the described lower casing.
9. a kind of high sensitivity contact vibration monitoring piezoelectric sensor as claimed in claim 1 is characterized in that: pcb board holder, five metals holder or the plastic cement holder of described fixture for the edge of described assembly being fixed.
10. a kind of high sensitivity contact vibration monitoring piezoelectric sensor as claimed in claim 1 is characterized in that: screw, rivet, compressing tablet or the briquetting of described fixture for the edge of described assembly being fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN200920205385XU CN201514275U (en) | 2009-10-10 | 2009-10-10 | high-sensitivity contact-type vibration monitoring piezoelectric sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200920205385XU CN201514275U (en) | 2009-10-10 | 2009-10-10 | high-sensitivity contact-type vibration monitoring piezoelectric sensor |
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| CN201514275U true CN201514275U (en) | 2010-06-23 |
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| CN200920205385XU Expired - Lifetime CN201514275U (en) | 2009-10-10 | 2009-10-10 | high-sensitivity contact-type vibration monitoring piezoelectric sensor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103431848A (en) * | 2013-09-22 | 2013-12-11 | 天津万合星辰信息技术有限公司 | Portable passive sensor |
| CN103462595A (en) * | 2013-09-22 | 2013-12-25 | 天津万合星辰信息技术有限公司 | Portable sensor assembly |
| CN104161499A (en) * | 2014-07-03 | 2014-11-26 | 深圳市赛亿科技开发有限公司 | Control method used for accurately measuring pulses by means of PVDF pulse sensor |
| CN104921751A (en) * | 2015-06-23 | 2015-09-23 | 杨松 | Contact type pickup microphone and stethoscope |
| CN105784092A (en) * | 2015-01-09 | 2016-07-20 | 罗伯特·博世有限公司 | Vibration Receiver Used For Receiving Vibration Of Component Causing Vibration |
| WO2017214768A1 (en) * | 2016-06-12 | 2017-12-21 | 深圳市沃特沃德股份有限公司 | Piezoelectric sensing device and pectoral girdle for pets |
| CN108398181A (en) * | 2018-02-06 | 2018-08-14 | 麒盛科技股份有限公司 | Integral type bio-signal acquisition sensor |
| CN108507666A (en) * | 2018-03-30 | 2018-09-07 | 华中科技大学 | A kind of micro-vibration detector based on piezoelectric sensing |
-
2009
- 2009-10-10 CN CN200920205385XU patent/CN201514275U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103431848A (en) * | 2013-09-22 | 2013-12-11 | 天津万合星辰信息技术有限公司 | Portable passive sensor |
| CN103462595A (en) * | 2013-09-22 | 2013-12-25 | 天津万合星辰信息技术有限公司 | Portable sensor assembly |
| CN103431848B (en) * | 2013-09-22 | 2015-10-21 | 天津普仁万合信息技术有限公司 | A kind of Portable passive sensor |
| CN104161499A (en) * | 2014-07-03 | 2014-11-26 | 深圳市赛亿科技开发有限公司 | Control method used for accurately measuring pulses by means of PVDF pulse sensor |
| CN104161499B (en) * | 2014-07-03 | 2016-04-13 | 深圳市赛亿科技开发有限公司 | A kind of control method applying PVDF pulse transducer Measurement accuracy pulse |
| CN105784092A (en) * | 2015-01-09 | 2016-07-20 | 罗伯特·博世有限公司 | Vibration Receiver Used For Receiving Vibration Of Component Causing Vibration |
| CN104921751A (en) * | 2015-06-23 | 2015-09-23 | 杨松 | Contact type pickup microphone and stethoscope |
| WO2017214768A1 (en) * | 2016-06-12 | 2017-12-21 | 深圳市沃特沃德股份有限公司 | Piezoelectric sensing device and pectoral girdle for pets |
| CN108398181A (en) * | 2018-02-06 | 2018-08-14 | 麒盛科技股份有限公司 | Integral type bio-signal acquisition sensor |
| CN108507666A (en) * | 2018-03-30 | 2018-09-07 | 华中科技大学 | A kind of micro-vibration detector based on piezoelectric sensing |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20100623 |