CN211222924U - Tire pressure detection device and system - Google Patents
Tire pressure detection device and system Download PDFInfo
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- CN211222924U CN211222924U CN201922225323.1U CN201922225323U CN211222924U CN 211222924 U CN211222924 U CN 211222924U CN 201922225323 U CN201922225323 U CN 201922225323U CN 211222924 U CN211222924 U CN 211222924U
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Abstract
The utility model discloses a tire pressure detecting device and a tire pressure monitoring system, wherein the tire pressure monitoring device comprises a piezoelectric sensing unit, a charge transfer unit and a potential detecting unit; the piezoelectric sensing unit is made of piezoelectric materials, and the charge transfer unit is positioned on one side of the piezoelectric sensing unit and is electrically connected with the piezoelectric sensing unit; the electric potential detection unit is positioned on one side of the charge transfer unit far away from the piezoelectric induction unit, and a gap exists between the electric potential detection unit and the charge transfer unit. The utility model discloses utilize the piezoelectricity effect of piezoelectricity induction element, made the electric charge transfer unit gather a large amount of same kind of electric charges, detected the relative electric potential between electric charge transfer unit and the electric potential detecting element through the electric potential detecting element, can obtain corresponding tire pressure by analysis; the structure is simple, a built-in power supply is not needed, regular replacement is not needed, and the service life is long.
Description
Technical Field
The utility model relates to a tire pressure detects technical field, especially relates to a tire pressure detection device and system.
Background
Mandatory national standards specify: from 2019, all new certified passenger vehicles in the China market must be provided with a Tire Pressure Monitoring System (TPMS); in 2020, all vehicles in production and passenger use begin to implement mandatory installation requirements, and the importance degree of tire pressure detection on automobile safety can be seen. The current tire pressure detection system is mainly a wireless tire pressure detection system, a tire pressure sensor is arranged between a hub and a tire, the tire pressure sensor is independently powered, and a detected tire pressure signal is transmitted to a computer through wireless transmission. The tire pressure sensor has a complex structure, a battery is required to be arranged, the service life of the battery is limited, the tire pressure sensor needs to be replaced periodically, and the tire pressure sensor is troublesome to replace at the later stage. Therefore, it is desirable to provide a tire pressure detecting device and system that is simple in structure and long in service life.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome among the prior art tire pressure sensor life-span limited, change inconvenient not enough, provide a simple structure, long service life's tire pressure detection device and system.
The technical scheme of the utility model provides a tire pressure detection device, including piezoelectricity induction element, charge transfer unit and electric potential detecting element;
the piezoelectric sensing unit is made of piezoelectric materials, and the charge transfer unit is positioned on one side of the piezoelectric sensing unit and is electrically connected with the piezoelectric sensing unit;
the electric potential detection unit is positioned on one side of the charge transfer unit far away from the piezoelectric induction unit, and a gap exists between the electric potential detection unit and the charge transfer unit.
Furthermore, the piezoelectric sensing unit is a patch made of piezoelectric materials.
Further, the charge transfer unit is an annular sheet made of a metal conductor, and the piezoelectric sensing unit faces an annular surface of the charge transfer unit.
Further, the potential detection unit is a potential sensor.
The utility model also provides a tire pressure detection system, which comprises a signal processing unit, a signal transmission unit, a display unit and the tire pressure detection device provided by the utility model;
the piezoelectric sensing unit of the tire pressure detection device is arranged on one side, close to a tire, of a hub of an automobile wheel, and the charge transfer unit is arranged on one side, far away from the tire, of the hub;
the signal processing unit is in communication connection with the potential detection unit, and the signal processing unit is in communication connection with the display unit through the signal transmission unit.
Further, the charge transfer unit is an annular sheet made of a metal conductor, and an annular surface of the charge transfer unit is tightly attached to the hub.
Further, the electric potential detection unit is mounted on a brake caliper cover of an automobile wheel.
Further, the signal processing unit is a driving computer or a vehicle control unit.
Further, the signal transmission unit is a controller area network bus.
Further, the display unit is an automobile instrument panel and/or an indicator light.
After adopting above-mentioned technical scheme, have following beneficial effect:
the utility model discloses utilize the piezoelectricity effect of piezoelectricity induction element, made the electric charge transfer unit gather a large amount of same kind of electric charges, detected the relative electric potential between electric charge transfer unit and the electric potential detecting element through the electric potential detecting element, can obtain corresponding tire pressure by analysis; the structure is simple, a built-in power supply is not needed, regular replacement is not needed, and the service life is long.
Drawings
The disclosure of the present invention will become more readily understood by reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present disclosure. In the figure:
fig. 1 is a schematic view of a tire pressure detecting device according to an embodiment of the present invention;
fig. 2 is a schematic view of an operation principle of the tire pressure detecting device in an embodiment of the present invention;
fig. 3 is a schematic view illustrating a tire pressure detecting device mounted on a wheel hub according to an embodiment of the present invention;
fig. 4 is a structural diagram of a tire pressure detecting system according to an embodiment of the present invention.
Reference symbol comparison table:
the piezoelectric sensing unit 01, the charge transfer unit 02 and the potential detection unit 03;
a signal processing unit 10, a signal transmission unit 20, a display unit 30, a tire pressure detecting device 40;
Detailed Description
The following describes the present invention with reference to the accompanying drawings.
It is easily understood that, according to the technical solution of the present invention, a plurality of structural modes and implementation modes that can be mutually replaced by those of ordinary skill in the art can be achieved without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are only exemplary illustrations of the technical solutions of the present invention, and should not be construed as limiting or restricting the technical solutions of the present invention in its entirety or as a limitation of the present invention.
The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.
The first embodiment is as follows:
the tire pressure detecting device in the present embodiment, as shown in fig. 1, includes a piezoelectric sensing unit 01, a charge transfer unit 02, and a potential detecting unit 03;
the piezoelectric sensing unit 01 is made of piezoelectric materials, and the charge transfer unit 02 is positioned on one side of the piezoelectric sensing unit 01 and is electrically connected with the piezoelectric sensing unit 01;
the potential detecting unit 03 is located on the side of the charge transfer unit 02 away from the piezoelectric sensing unit 01, and a gap exists between the potential detecting unit 03 and the charge transfer unit 02.
Specifically, the piezoelectric sensing unit 01 is used for contacting with a tire to sense a tire pressure of the tire, the piezoelectric sensing unit 01 converts the tire pressure of the tire into a change of a potential by using a piezoelectric effect, and the larger the pressure applied by the tire received by the piezoelectric sensing unit 01 is, the larger the change of the potential is. By calibrating the corresponding relation between the tire pressure and the potential variation, tire pressure data can be obtained by detecting the potential.
The charge transfer unit 02 is electrically connected with the piezoelectric sensing unit 01, so that the charge of the piezoelectric sensing unit 01 is transferred to the charge transfer unit 02, a gap is reserved between the potential detection unit 03 and the charge transfer unit 02, the charge transfer unit 02 and the potential detection unit 03 form a capacitance structure, and the relative potential data on the charge transfer unit 02 and the potential detection unit 03 detected by the potential detection unit 03 is the potential variation of the piezoelectric sensing unit 01.
Since the piezoelectric sensing unit 01 needs to be in contact with the tire, generally, the piezoelectric sensing unit 01 is installed between a wheel hub and the tire, and if the potential detection unit 03 directly detects the potential change on the piezoelectric sensing unit 01, the potential detection unit 03 also needs to be installed between the wheel hub and the tire, and the tire is greatly squeezed, so that the charge on the piezoelectric sensing unit 01 is transferred to the charge transfer unit 02, and the charge transfer unit 02 and the potential detection unit 03 can be installed at other positions, so that the squeezing of the tire is reduced.
Further, the piezoelectric sensing unit 01 is a patch made of piezoelectric material, wherein the piezoelectric material may be piezoelectric crystal or piezoelectric ceramic, which is a patch with uniform thickness, the tire presses one side surface of the patch, and a potential difference is generated between the two side surfaces of the patch. The patch is uniform in stress, high in detection precision and thin in thickness, and occupies less tire installation space.
Further, the charge transfer unit 02 is an annular sheet (only a part of the annular sheet is shown in fig. 1) made of a metal conductor, and the piezoelectric sensing unit 01 faces an annular surface of the charge transfer unit 02.
Specifically, the potential detecting unit 03 and the charge transferring unit 02 are of a separate two-part structure, while the charge transferring unit 02 and the charge sensing unit 01 are mounted on a hub, and in order to ensure that the rotation of the hub does not affect the detection of the potential as the hub rotates synchronously, the charge transferring unit 02 is provided as an annular thin sheet made of a metal conductor, the annular thin sheet is arranged along the circumferential direction of the hub, and the piezoelectric sensing unit 01 faces the annular surface of the charge transferring unit 02, so that the potential detecting unit 03 can always detect the potential of the charge transferring unit 02 even if the hub rotates.
Further, the potential detecting unit 03 is a potential sensor. The surface of the charge transfer unit 02 has the electric charges generated by the piezoelectric sensing unit 01, and the potential sensor can detect the relative potential between the detection end of the potential sensor and the charge transfer unit 02. The greater the tire pressure to which the piezoelectric sensing unit 01 is subjected, the greater the relative electric potential, and therefore, the corresponding tire pressure can be determined by the relative electric potential detected by the electric potential sensor.
The above is the structure of the tire pressure detecting device, and the following explains the principle of the tire pressure detecting device of the present embodiment:
as shown in fig. 3, when the upper surface of the piezoelectric sensing unit 01 is pressed by the pressure N of the tire, a potential difference is generated between the upper surface and the lower surface of the piezoelectric sensing unit 01 due to the piezoelectric effect, and it is illustrated that the upper surface of the piezoelectric sensing unit 01 collects positive charges and the lower surface collects negative charges, and the potential difference between the upper surface and the lower surface of the piezoelectric sensing unit 01 is larger as the pressure N from the tire is larger.
The charge transfer unit 02 is connected to the lower surface of the piezoelectric sensing unit 01 through a conductor, so that negative charges accumulated on the lower surface of the piezoelectric sensing unit 01 can be transferred to the charge transfer unit 02. The electric potential detection unit 03 and the electric charge transfer unit 02 are arranged oppositely, the electric potential difference between the upper surface and the lower surface of the piezoelectric induction unit 01 is obtained by detecting the relative electric potential between the electric charge transfer unit 02 and the electric potential detection unit 03, and corresponding tire pressure data can be obtained by calibrating the corresponding relationship between the tire pressure and the electric potential difference in advance.
The tire pressure detection device of this embodiment utilizes the piezoelectricity effect of piezoelectricity induction element 01, converts tire pressure into electric potential signal to through electric charge transfer unit 02 transfer charge, make electric potential detection element 03 need not install between wheel hub and tire with piezoelectricity induction element 01 an organic whole, consequently need not built-in power, can utilize external power source to supply power for electric potential detection element 03, also reduced the tire installation space that tire pressure detection device occupy simultaneously, reduced the extrusion to the tire.
Example two:
the tire air pressure detecting system in the present embodiment, as shown in fig. 3 and 4, includes a signal processing unit 10, a signal transmission unit 20, a display unit 30, and the tire air pressure detecting device 40 in the first embodiment;
the tire pressure detecting device 40 is installed on a wheel hub 100 of an automobile wheel, wherein a piezoelectric sensing unit 01 is installed on one side of the wheel hub 100 close to a tire, and a charge transfer unit 02 is installed on one side of the wheel hub 100 far away from the tire;
the signal processing unit 10 is communicatively connected to the potential detecting unit 02, and the signal processing unit 10 is communicatively connected to the display unit 30 through the signal transmitting unit 20.
Specifically, fig. 3 illustrates an installation state of the tire pressure detecting device 40, in which the piezoelectric sensing unit 01 is installed on the outer surface of the wheel hub 100, and a tire (not shown) is also installed on the outer surface of the wheel hub 100, so that the piezoelectric sensing unit 01 is located between the outer surface of the wheel hub 100 and the tire, and can accurately sense a change in tire pressure;
the charge transfer unit 02 is an annular sheet made of a metal conductor and is arranged along the circumferential direction of the hub 100, the annular surface of the charge transfer unit 02 is tightly attached to the inner surface of the hub 100, the occupied space is extremely small, and the rotation of the hub 100 is not influenced at all;
the potential detecting unit 03 is installed inside the hub 100 with its detecting end disposed opposite to the charge transfer unit 02.
Referring to fig. 4 again, the signal processing unit 10 is communicatively connected to the tire pressure detecting unit 40, specifically, the electric potential detecting unit 03, to receive the electric potential data detected by the electric potential detecting unit 03, the corresponding relationship between the electric potential and the tire pressure obtained through calibration is recorded in the signal processing unit 10 in advance, and the signal processing unit 10 can correspond to the current tire pressure data according to the received electric potential data.
The signal processing unit 10 is in communication connection with the display unit 30 through the signal transmission unit 20, the tire pressure data obtained by the signal processing unit 10 according to the electric potential data is transmitted to the display unit 30 through the signal transmission unit 20, and the tire pressure data is displayed by the display unit 30 in real time, so that a driver can monitor the tire pressure condition conveniently. The signal transmission unit 20 may use wired communication or wireless communication.
In this embodiment, the electric potential detecting unit 02 is in communication connection with the signal processing unit 10 through a data transmission line, and in this embodiment, the tire pressure data is transmitted in a wired communication manner, so that the reliability of signal transmission is improved.
Further, as shown in fig. 3, the potential detecting unit 02 is mounted on the brake caliper cover 200 of the wheel of the automobile, so that the load of the wheel hub 100 is reduced, the piezoelectric sensing unit 01 and the charge transfer unit 02 on the wheel hub 100 rotate synchronously with the wheel hub 100, the brake caliper cover 200 does not rotate with the wheel hub 100, and the charge transfer unit 02 is arranged along the circumferential direction of the wheel hub 100, so that the detection of the relative potential by the potential detecting unit 02 is not affected even if the charge transfer unit 02 rotates.
In this embodiment, the signal transmission unit adopts a Controller Area Network (CAN) bus, the signal processing unit 10 is a vehicle computer (ECU) or a Vehicle Control Unit (VCU), and the display unit 30 is an automobile instrument panel and/or an indicator light, and data communication, data processing and result display are realized by using original equipment in an automobile system, so that the number of the equipment is reduced, and the integrity of the automobile control system is ensured.
The tire pressure detecting system in the first embodiment adopts the tire pressure detecting device in the first embodiment, reduces the occupied space of the tire pressure detecting device on the hub, realizes external power supply, does not need to be replaced regularly, and prolongs the service life. And the processing, transmission and display of the tire pressure signal all adopt the original equipment in the automobile control system, and the tire pressure detection system is incorporated into the automobile control system, so that the integrity of automobile control is ensured.
What has been described above is merely the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, on the basis of the principle of the present invention, several other modifications can be made, and the protection scope of the present invention should be considered.
Claims (10)
1. A tire pressure detecting device is characterized by comprising a piezoelectric sensing unit, a charge transfer unit and a potential detecting unit;
the piezoelectric sensing unit is made of piezoelectric materials, and the charge transfer unit is positioned on one side of the piezoelectric sensing unit and is electrically connected with the piezoelectric sensing unit;
the electric potential detection unit is positioned on one side of the charge transfer unit far away from the piezoelectric induction unit, and a gap exists between the electric potential detection unit and the charge transfer unit.
2. The tire pressure detecting device of claim 1, wherein the piezoelectric sensing unit is a patch made of piezoelectric material.
3. The tire pressure detecting device according to claim 1, wherein the charge transfer unit is an annular sheet made of a metal conductor, and the piezoelectric sensing unit faces an annular surface of the charge transfer unit.
4. The tire air pressure detecting device according to claim 1, wherein the electric potential detecting unit is an electric potential sensor.
5. A tire pressure detecting system, characterized by comprising a signal processing unit, a signal transmission unit, a display unit, and the tire pressure detecting device of any one of claims 1 to 4;
the piezoelectric sensing unit of the tire pressure detection device is arranged on one side, close to a tire, of a hub of an automobile wheel, and the charge transfer unit is arranged on one side, far away from the tire, of the hub;
the signal processing unit is in communication connection with the potential detection unit, and the signal processing unit is in communication connection with the display unit through the signal transmission unit.
6. The tire pressure detecting system of claim 5, wherein the charge transfer unit is an annular sheet made of a metallic conductor, an annular surface of the charge transfer unit being in close proximity to the hub.
7. The tire pressure detecting system according to claim 5, wherein the electric potential detecting unit is mounted on a brake caliper cover of a wheel of an automobile.
8. The tire pressure detecting system according to any one of claims 5 to 7, wherein the signal processing unit is a vehicle computer or a vehicle control unit.
9. The tire pressure detecting system according to any one of claims 5 to 7, wherein the signal transmission unit is a controller area network bus.
10. The tire pressure detecting system according to any one of claims 5 to 7, wherein the display unit is a dashboard and/or an indicator light of a vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922225323.1U CN211222924U (en) | 2019-12-12 | 2019-12-12 | Tire pressure detection device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922225323.1U CN211222924U (en) | 2019-12-12 | 2019-12-12 | Tire pressure detection device and system |
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| Publication Number | Publication Date |
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| CN211222924U true CN211222924U (en) | 2020-08-11 |
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| CN201922225323.1U Active CN211222924U (en) | 2019-12-12 | 2019-12-12 | Tire pressure detection device and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116461257A (en) * | 2023-05-12 | 2023-07-21 | 广东海洋大学 | Tire pressure monitoring device, method and system, wheel and carrier |
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- 2019-12-12 CN CN201922225323.1U patent/CN211222924U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116461257A (en) * | 2023-05-12 | 2023-07-21 | 广东海洋大学 | Tire pressure monitoring device, method and system, wheel and carrier |
| CN116461257B (en) * | 2023-05-12 | 2024-04-12 | 广东海洋大学 | Tire pressure monitoring device, method and system, wheel and carrier |
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