CN210051287U

CN210051287U - Piezoelectric sensor

Info

Publication number: CN210051287U
Application number: CN201920516035.9U
Authority: CN
Inventors: 聂泳忠; 苏伟君
Original assignee: Xirenma (xiamen) Technology Co Ltd
Current assignee: Fatri United Testing and Control Quanzhou Technologies Co Ltd
Priority date: 2019-04-16
Filing date: 2019-04-16
Publication date: 2020-02-11
Anticipated expiration: 2029-04-16

Abstract

The utility model provides a piezoelectric sensor, include: the sensor comprises a sensor body, a first vibration sensor and a second vibration sensor, wherein the sensor body comprises a first shell and a charge output structure accommodated in the first shell, and the charge output structure is used for inducing vibration and outputting an electric signal; the data acquisition structure comprises a second shell and a data acquisition unit accommodated in the second shell, wherein the first shell is fixedly connected with the second shell, and the data acquisition unit is used for converting an electric signal into a digital signal; and the signal wires are accommodated in the first shell and the second shell and are respectively electrically connected with the charge output structure and the data acquisition unit so as to transmit the electric signals of the charge output structure to the data acquisition unit. First casing and second casing are fixed connection, and the signal line holds in first casing and second casing, promptly, the signal line can not expose, can reduce external influence to the signal line like this, improves the degree of accuracy of the signal of telecommunication that transmits to data collection station, and then improves the degree of accuracy of the test data who obtains, improves piezoelectric sensor's sensitivity.

Description

Piezoelectric sensor

Technical Field

The utility model relates to a technical field of sensor, concretely relates to piezoelectric type sensor.

Background

In the perimeter perception alarm system, signals are collected through a piezoelectric sensor, the occurrence position and physical characteristics of the signals are analyzed through an intelligent algorithm, and finally rechecking confirmation is carried out through videos, so that the piezoelectric sensor is favored in the field of intelligent security.

In the prior art, the piezoelectric sensor comprises a sensor body and a data acquisition structure, wherein the sensor body and the data acquisition structure are separately arranged and are connected through a signal line. However, in the process of detecting the piezoelectric sensor, because the signal line between the sensor body and the data acquisition structure is too long and the signal line is exposed outside, when a signal is transmitted from the sensor body to the data acquisition structure through the signal line, superposition of bottom noise is easily generated in the process of transmitting the signal on the signal line, so that the sensitivity of the sensor is reduced, and finally, the test data acquired by the data acquisition structure of the piezoelectric sensor is inaccurate.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the unsafe defect of test data that the structure was acquireed is adopted to the data of the piezoelectric sensor among the prior art to a piezoelectric sensor is provided.

In order to solve the technical problem, the utility model provides a piezoelectric sensor, include:

the sensor comprises a sensor body, a first vibration sensor and a second vibration sensor, wherein the sensor body comprises a first shell and a charge output structure accommodated in the first shell, and the charge output structure is used for inducing vibration and outputting an electric signal;

the data acquisition structure comprises a second shell and a data acquisition unit accommodated in the second shell, wherein the first shell is fixedly connected with the second shell, and the data acquisition unit is used for converting an electric signal into a digital signal;

and the signal wires are accommodated in the first shell and the second shell and are respectively electrically connected with the charge output structure and the data acquisition unit so as to transmit the electric signals of the charge output structure to the data acquisition unit.

Optionally, the first housing is welded to the second housing.

Optionally, the charge output structure comprises:

the bracket comprises a supporting part and a connecting part formed on the supporting part, and a limiting boss is arranged along the circumferential direction of the connecting part;

the piezoelectric element is sleeved on the periphery of the connecting part and is bonded with the connecting part, and one side surface of the piezoelectric element, which is close to the supporting part, is abutted against the limiting boss;

and the mass block is sleeved on the periphery of the piezoelectric element, is adhered to the piezoelectric element and is arranged above the supporting part in a suspending way.

Optionally, the sensor body further includes an insulating cover located in the first housing, and the insulating cover is disposed on the charge output structure and abuts against the support portion.

Optionally, the sensor body further includes a base, the first housing is connected to the base, the support is disposed on the base, and an insulating layer is disposed between the support and the base.

Optionally, a first cavity is formed between the first housing and the insulating cover, and insulating glue is filled in the first cavity and is suitable for isolating the insulating cover from the first housing.

Optionally, the first housing is made of an insulating material.

Optionally, a second cavity is formed between the second shell and the data collector, and the second cavity is filled with insulating heat-conducting glue and is suitable for isolating the data collector from the second shell.

Optionally, the connecting portion is a columnar structure, and the piezoelectric element and the mass block are both annular structures;

the connecting portion are kept away from a side of the supporting portion with piezoelectric element keeps away from a side parallel and level of the supporting portion, piezoelectric element keeps away from a side of the supporting portion is lower than the mass block keeps away from a side of the supporting portion, piezoelectric element is close to a side of the supporting portion with the mass block is close to a side parallel and level of the supporting portion.

Optionally, a circuit board is disposed on a side of the mass away from the support portion, the circuit board is located in the insulating cover, and the circuit board is electrically connected to the charge output structure and the signal line, respectively.

Optionally, the insulating cover is provided with a through hole, and the signal line passes through the through hole and is electrically connected with the circuit board and the data collector respectively.

Optionally, the device further comprises a probe fixedly connected with the base and suitable for being inserted into an object to be tested.

Optionally, the mobile terminal further comprises a cable connected with the data collector, and one end of the cable extends out of the second shell to be connected with the mobile terminal.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a piezoelectric sensor, including the sensor body, structure and signal line are adopted to the data, the sensor body includes first casing and holds the charge output structure in first casing, the vibration and the output signal of telecommunication of determinand can be responded to the charge output structure, the structure is adopted to the data acquisition ware that includes the second casing and hold in the second casing to the data acquisition ware, data acquisition ware can change the signal of telecommunication into digital signal, the signal line is connected with charge output structure and data acquisition ware electricity respectively, the signal of telecommunication accessible signal line transmission to data acquisition ware that the structure was gathered to the charge output like this, change the signal of telecommunication into digital signal in data acquisition ware. Because first casing and second casing are fixed connection, and the signal line holds in first casing and second casing, promptly, the signal line can not expose, can reduce external influence to the signal line like this, improves the degree of accuracy of the signal of telecommunication that transmits to data collection station, and then improves the degree of accuracy of the test data who obtains, improves piezoelectric sensor's sensitivity.

Furthermore, because first casing and second casing are fixed connection, the distance that the signal line is connected between charge output structure and the structure of adopting is very short, can reduce the length of signal line like this, further reduces the interference in the signal transmission process, improves the degree of accuracy of test data.

2. The utility model provides a piezoelectric sensor, first casing and second casing welding can further reduce the end of producing on the signal line like this and make an uproar, improve the degree of accuracy of test data and the sensitivity of sensor.

3. The utility model provides a piezoelectric sensor, charge output structure include support, piezoelectric element and quality piece, and the support includes supporting part and the connecting portion of connection on the supporting part, and the piezoelectric element cover is established in the periphery of connecting portion and is bonded with connecting portion, and simultaneously, the spacing boss butt of piezoelectric element and connecting portion periphery can prevent that it from droing and supporting part lug connection from connecting portion with piezoelectric element's rigidity like this. The mass block is sleeved on the periphery of the piezoelectric element and is bonded with the piezoelectric element so as to be fixed on the piezoelectric element, and meanwhile, the mass block is arranged above the supporting part in a suspension mode, namely, the mass block is not in direct contact with the supporting part. Due to the firm connection among the connecting part, the piezoelectric element and the mass block, the sensitivity output of the charge output structure can be more stable.

4. The utility model provides a piezoelectric sensor, sensor body still include the insulating boot that is located first casing, and the insulating boot cover is established on charge output structure and with the supporting part butt, can keep apart first casing and charge output structure through the insulating boot, and the insulating boot can make charge output structure not influenced by the electric charge that parts such as first casing produced simultaneously, effectively reduces the influence of noise signal to charge output structure to improve the degree of accuracy of the signal of charge output structure; meanwhile, electric charges generated on the charge output structure can be prevented from being exposed, the integral conductivity of the charge output structure is improved, and the sensitivity of the piezoelectric sensor is further improved, so that the piezoelectric sensor can more accurately detect extremely low-frequency signals and can be quickly positioned.

5. The utility model provides a piezoelectric sensor, sensor body still include the base, and first casing is connected with the base, and the support setting is on the base, is provided with the insulating layer between support and base, can further reduce the influence of the signal that the external component produced like this to the charge output structure, further reduce the influence of noise signal to the charge output structure to improve the degree of accuracy of the signal of charge output structure; meanwhile, the electric charge generated on the electric charge output structure is further prevented from being exposed, the integral conductivity of the electric charge output structure is improved, and the sensitivity of the piezoelectric sensor is improved.

6. The utility model provides a piezoelectric sensor forms first cavity between first casing and the insulating boot, is filled with the insulating cement in first cavity intussuseption, and the insulating cement can keep apart insulating boot and first casing, can further reduce the influence of electric charge that parts such as first casing produced to charge output structure, further reduce noise signal to charge output structure's influence to the degree of accuracy of the signal that improves charge output structure has improved piezoelectric sensor's sensitivity.

7. The piezoelectric sensor provided by the utility model has the advantages that the first shell is made of the insulating material, so that the first shell can not generate charges and can not influence the charge output structure; meanwhile, the influence of the charges generated by the parts outside the first shell on the charge output structure can be isolated, and the influence of noise signals on the charge output structure is further reduced, so that the accuracy of signals of the charge output structure is improved, and the sensitivity of the piezoelectric sensor is improved.

8. The utility model provides a piezoelectric sensor, form the second cavity before second casing and the data collection station, the intussuseption of second cavity is filled with insulating heat-conducting glue, insulating heat-conducting glue keeps apart data collection station and second casing, the signal line that will be located the second casing simultaneously also keeps apart with the second casing, the stack of making an uproar at the bottom of having further reduced the production on the signal line like this, improve test data's the degree of accuracy, improve piezoelectric sensor's sensitivity, make it can be accurate carry out more accurate detection to utmost point low frequency signal.

9. The utility model provides a piezoelectric sensor, connecting portion are column structure, and piezoelectric element and quality piece are the loop configuration, and through the volume that increases the quality piece like this, perhaps choose the higher piezoelectric element of piezoelectric coefficient for use, can improve the effective signal output of charge output structure, and then improve piezoelectric sensor's sensitivity, make its signal that can extremely low frequency carry out accurate detection, realize quick location.

10. The utility model provides a piezoelectric sensor, circuit board set up in the insulating boot to on the setting deviates from the side of supporting part at the quality piece, the circuit board respectively with charge output structure and signal line electricity connection, can completely cut off the interference of first casing to the circuit board through the effect of insulating boot, can improve the accuracy of the signal of telecommunication on transmitting to the signal line from the circuit board, and then improve test data's the degree of accuracy.

11. The utility model provides a piezoelectric sensor still includes the probe with base fixed connection, and the probe can insert the determinand, and the installation time of reducible sensor simultaneously, can make the stable stability of sensor in the determinand.

12. The utility model provides a piezoelectric sensor, cable connection can be with the data transmission to mobile terminal that data collection station gathered, the audio-visual test result of watching of being convenient for between data collection station and mobile terminal.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front view of a piezoelectric transducer according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a piezoelectric transducer provided in an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a sensor body provided in an embodiment of the present invention;

fig. 4 is a schematic view of a bracket provided in an embodiment of the present invention.

Description of reference numerals:

1. a first housing; 2. a second housing; 3. a data acquisition unit; 4. a support; 41. a support portion; 42. a connecting portion; 43. a limiting boss; 5. a piezoelectric element; 6. a mass block; 7. an insulating cover; 71. a through hole; 8. a base; 9. a first cavity; 10. a second cavity; 11. a circuit board; 12. a probe; 13. a cable; 14. an insulating layer.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

One embodiment of the piezoelectric transducer shown in fig. 1 to 4 includes:

the sensor body comprises a first shell 1 and a charge output structure accommodated in the first shell 1, wherein the charge output structure is used for inducing vibration and outputting an electric signal.

The data acquisition structure comprises a second shell 2 and a data acquisition unit 3 accommodated in the second shell 2, wherein the first shell 1 is fixedly connected with the second shell 2, and the data acquisition unit 3 is used for converting an electric signal into a digital signal.

And the signal wires are accommodated in the first shell 1 and the second shell 2 and are respectively electrically connected with the charge output structure and the data collector 3 so as to transmit the electric signals of the charge output structure to the data collector 3.

Because first casing 1 and second casing 2 are fixed connection, and the signal line holds in first casing 1 and second casing 2, promptly, the signal line can not expose outside, can reduce external influence to the signal line like this, reduces the end that produces on the signal line and makes an uproar the stack, improves the degree of accuracy of the signal of telecommunication that transmits to data collection station 3, and then improves the degree of accuracy of the test data who obtains, improves piezoelectric sensor's sensitivity.

Further, because the first shell 1 and the second shell 2 are fixedly connected, the distance between the signal line and the charge output structure and the data acquisition structure is short, so that the length of the signal line can be reduced, the interference in the process of transmitting the electric signal is further reduced, and the accuracy of test data is improved.

Specifically, the first housing 1 is welded to the second housing 2. Therefore, the bottom noise generated on the signal line can be further reduced, and the accuracy of test data and the sensitivity of the sensor are improved.

As shown in fig. 3, the charge output structure includes:

the support 4 comprises a support part 41 and a connecting part 42 formed on the support part 41, and a limit boss 43 is arranged along the circumferential direction of the connecting part 42.

And the piezoelectric element 5 is sleeved on the periphery of the connecting part 42 and is adhered to the connecting part 42, and one side surface, close to the supporting part 41, of the piezoelectric element 5 is abutted to the limiting boss 43. This fixes the position of the piezoelectric element 5, and prevents it from coming off the connecting portion 42 and directly connecting to the supporting portion 41.

And the mass block 6 is sleeved on the periphery of the piezoelectric element 5, is adhered to the piezoelectric element 5, and is suspended above the supporting part 41. This makes it possible to fix the mass 6 to the piezoelectric element 5, while the mass 6 is suspended above the support 41, i.e. the mass 6 is not in direct contact with the support 41. Due to the stable connection among the connection portion 42, the piezoelectric element 5, and the mass block 6, the sensitivity output of the charge output structure can be more stable, and the deviation between test data can be reduced.

The piezoelectric element 5 is not limited, and may be an element made of any material having piezoelectric characteristics. In the present embodiment, the piezoelectric element 5 may be a piezoelectric ceramic.

As shown in fig. 3, the sensor body further includes an insulating cover 7 located in the first housing 1, and the insulating cover 7 covers the charge output structure and abuts against the support portion 41. The first shell 1 and the charge output structure can be isolated through the insulating cover 7, meanwhile, the charge output structure is not influenced by charges generated by the first shell 1 and other components through the insulating cover 7, the influence of noise signals on the charge output structure is effectively reduced, and therefore the accuracy of signals of the charge output structure is improved; meanwhile, the insulating cover 7 can prevent the electric charges generated on the electric charge output structure from being exposed, improve the overall conductive performance of the electric charge output structure, and further improve the sensitivity of the piezoelectric sensor, so that the piezoelectric sensor can more accurately detect extremely low-frequency signals and quickly position the signals.

As shown in fig. 3, the sensor body further includes a base 8, the first housing 1 is connected to the base 8, the support 4 is disposed on the base 8, and an insulating layer 14 is disposed between the support 4 and the base 8. Therefore, the influence of signals generated by external components on the charge output structure can be further reduced, and the influence of noise signals on the charge output structure can be further reduced, so that the accuracy of the signals of the charge output structure is improved; meanwhile, the electric charge generated on the electric charge output structure is further prevented from being exposed, the integral conductivity of the electric charge output structure is improved, and the sensitivity of the piezoelectric sensor is improved.

As shown in fig. 3, a first cavity 9 is formed between the first housing 1 and the insulating cover 7, and the first cavity 9 is filled with insulating glue and adapted to isolate the insulating cover 7 from the first housing 1.

The insulating cement can isolate the insulating cover 7 from the first shell 1, the influence of charges generated by the first shell 1 and other components on the charge output structure can be further reduced, and the influence of noise signals on the charge output structure can be further reduced, so that the accuracy of signals of the charge output structure is improved, and the sensitivity of the piezoelectric sensor is improved. Moreover, the insulating glue is filled between the first shell 1 and the insulating cover 7, so that the piezoelectric sensor has a high-voltage resistance effect, and the service life of the piezoelectric sensor can be prolonged.

The first housing 1 is made of an insulating material. Therefore, the first shell 1 does not generate charges and does not influence the charge output structure; meanwhile, the influence of the charges generated by the components outside the first shell 1 on the charge output structure can be isolated, the influence of noise signals on the charge output structure is further reduced, and therefore the accuracy of signals of the charge output structure is improved, and the sensitivity of the piezoelectric sensor is improved.

As shown in fig. 2, a second cavity 10 is formed between the second housing 2 and the data collector 3, and the second cavity 10 is filled with insulating heat-conducting glue and is suitable for isolating the data collector 3 from the second housing 2.

Insulating heat-conducting glue keeps apart data collection station 3 and second casing 2, the signal line that will be located second casing 2 simultaneously also keeps apart with second casing 2, the stack of making an uproar at the end that produces on the signal line has further been reduced like this, improve test data's the degree of accuracy, improve piezoelectric sensor's sensitivity, make it can be accurate carry out more accurate detection to extremely low frequency signal, and simultaneously, insulating heat-conducting glue has radiating effect, can distribute away the heat that data collection station 3 produced, prevent that data collection station 3 from appearing the phenomenon of heat pile up, and then extension data collection station 3's life. Further, the insulating heat-conducting glue is filled between the second shell 2 and the data collector 3, so that the high-voltage resistance of the piezoelectric sensor can be further improved, and the service life of the piezoelectric sensor can be further prolonged.

As shown in fig. 3 and 4, the connection portion 42 is a columnar structure, the piezoelectric element 5 and the mass block 6 are both annular structures, a side surface of the connection portion 42 away from the support portion 41 is flush with a side surface of the piezoelectric element 5 away from the support portion 41, a side surface of the piezoelectric element 5 away from the support portion 41 is lower than a side surface of the mass block 6 away from the support portion 41, and a side surface of the piezoelectric element 5 close to the support portion 41 is flush with a side surface of the mass block 6 close to the support portion 41.

Can make like this and form effectual area of contact between quality piece 6, piezoelectric element 5 and the supporting part 41, through the volume that increases quality piece 6, perhaps choose for use piezoelectric element 5 that piezoelectric coefficient is higher, can improve the effective signal output of charge output structure, and then improve piezoelectric sensor's sensitivity, make it can carry out accurate detection to the signal of extremely low frequency, realize quick location.

As shown in fig. 3, a circuit board 11 is disposed on a side surface of the mass block 6 facing away from the support portion 41, the circuit board 11 is located in the insulating cover 7, and the circuit board 11 is electrically connected to the charge output structure and the signal line, respectively. The interference of the first shell 1 to the circuit board 11 can be isolated through the effect of the insulating cover 7, the accuracy of an electric signal transmitted to a signal wire from the circuit board 11 can be improved, and the accuracy of test data is further improved.

There are various ways to connect the signal line to the charge output structure and the data collector 3 through the insulating cover 7, for example, the insulating cover 7 is provided with a through hole 71, and the signal line passes through the through hole 71 and is electrically connected to the circuit board 11 and the data collector 3, respectively.

The anti-surge element is added on the circuit board 11, so that the high-voltage resistance of the piezoelectric sensor can be further improved.

As shown in fig. 1 and 2, the piezoelectric transducer further includes a probe 12 fixedly connected to the base 8 and adapted to be inserted into an object to be measured. The probe 12 can be inserted into the object to be measured, so that the installation time of the sensor can be reduced, and the sensor can be stably stabilized in the object to be measured.

Because the sensor body is respectively fixedly connected with the data acquisition structure and the probe 12, the piezoelectric sensor has good waterproof effect.

Because the piezoelectric sensor is provided with the insulating parts such as the insulating cover 7, the insulating layer 14, the insulating glue and the insulating heat-conducting glue, the piezoelectric sensor has a good lightning protection effect.

As shown in fig. 1 and 2, the piezoelectric sensor further includes a cable 13 connected to the data collector 3, and one end of the cable 13 extends out of the second housing 2 and is connected to the mobile terminal. Cable 13 is connected between data collection station 3 and mobile terminal, can be with data transmission to mobile terminal that data collection station 3 gathered, is convenient for audio-visually watch the test result.

The mobile terminal can be a mobile phone, a notebook computer, a vehicle-mounted computer or a tablet computer and the like.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A piezoelectric sensor, comprising:

the sensor comprises a sensor body and a control circuit, wherein the sensor body comprises a first shell (1) and a charge output structure accommodated in the first shell (1), and the charge output structure is used for inducing vibration and outputting an electric signal;

the data acquisition structure comprises a second shell (2) and a data acquisition unit (3) accommodated in the second shell (2), wherein the first shell (1) is fixedly connected with the second shell (2), and the data acquisition unit (3) is used for converting an electric signal into a digital signal;

and the signal wires are accommodated in the first shell (1) and the second shell (2) and are respectively electrically connected with the charge output structure and the data collector (3) so as to transmit the electric signals of the charge output structure to the data collector (3).

2. The piezoelectric sensor according to claim 1, wherein the first casing (1) is welded to the second casing (2).

3. The piezoelectric sensor of claim 1, wherein the charge output structure comprises:

the support (4) comprises a support part (41) and a connecting part (42) formed on the support part (41), and a limiting boss (43) is arranged along the circumferential direction of the connecting part (42);

the piezoelectric element (5) is sleeved on the periphery of the connecting part (42) and is adhered to the connecting part (42), and one side surface, close to the supporting part (41), of the piezoelectric element (5) is abutted to the limiting boss (43);

and the mass block (6) is sleeved on the periphery of the piezoelectric element (5), is adhered to the piezoelectric element (5), and is arranged above the supporting part (41) in a suspended mode.

4. The piezoelectric transducer according to claim 3, wherein the transducer body further comprises an insulating cover (7) located inside the first casing (1), the insulating cover (7) covering the charge output structure and abutting the support (41).

5. The piezoelectric transducer according to claim 4, wherein the transducer body further comprises a base (8), the first casing (1) is connected to the base (8), the support (4) is disposed on the base (8), and an insulating layer (14) is disposed between the support (4) and the base (8).

6. The piezoelectric transducer according to claim 5, wherein a first cavity (9) is formed between the first casing (1) and the insulating cover (7), and the first cavity (9) is filled with an insulating glue and adapted to isolate the insulating cover (7) from the first casing (1).

7. The piezoelectric transducer according to claim 6, wherein the first housing (1) is made of an insulating material.

8. The piezoelectric transducer according to claim 7, wherein a second cavity (10) is formed between the second casing (2) and the data collector (3), and the second cavity (10) is filled with an insulating and heat-conducting adhesive and is suitable for isolating the data collector (3) from the second casing (2).

9. The piezoelectric transducer according to claim 8, wherein the connecting portion (42) is a cylindrical structure, and the piezoelectric element (5) and the mass (6) are both annular structures;

connecting portion (42) are kept away from a side of supporting part (41) with piezoelectric element (5) are kept away from a side parallel and level of supporting part (41), piezoelectric element (5) are kept away from a side of supporting part (41) is less than mass block (6) are kept away from a side of supporting part (41), piezoelectric element (5) are close to a side of supporting part (41) with mass block (6) are close to a side parallel and level of supporting part (41).

10. The piezoelectric transducer according to claim 5, wherein a circuit board (11) is arranged on a side of the mass (6) facing away from the support (41), the circuit board (11) being located within the insulating cover (7), the circuit board (11) being electrically connected to the charge output structure and the signal line, respectively.

11. The piezoelectric transducer according to claim 10, wherein the insulating cover (7) is provided with a through hole (71), and the signal line passes through the through hole (71) and is electrically connected with the circuit board (11) and the data collector (3) respectively.

12. The piezoelectric transducer according to claim 5, further comprising a probe (12) fixedly connected to the base (8) and adapted to be inserted into an object to be measured.

13. The piezoelectric transducer according to claim 12, further comprising a cable (13) connected to the data collector (3), wherein one end of the cable (13) extends out of the second casing (2) and is connected to a mobile terminal.