阅读说明：本技术 一种汽车轮胎的无源监测系统 (Passive monitoring system of automobile tire ) 是由 唐荣江 顾昱彬 秦运柏 许恩永 罗海英 唐经添 于 2021-02-01 设计创作，主要内容包括：本发明涉及汽车制造领域,具体涉及一种汽车轮胎的无源监测系统,包括传感器模块、车轮检测模块和接收处理模块,所述传感器模块与车轮检测模块之间通过信号线连接,所述车轮检测模块与接收处理模块之间通过WIFI信号无线连接,车轮检测模块粘接在汽车轮胎气密层表面上。本发明的车轮检测模块设置有俘能器,俘能器的下层柔性压电膜组利用胎体的强张力和车胎运动时胎内压力的变化进行俘能,上层柔性压电膜组通过车胎滚动和车体振动时的压电膜产生近似颤振从而俘能。整套系统合理地利用车胎运动以及车体重力产生的能量,不需要为传感器和信号发生器配置电池,安装方便,使用寿命长,成本低。(The invention relates to the field of automobile manufacturing, in particular to a passive monitoring system of an automobile tire, which comprises a sensor module, a wheel detection module and a receiving processing module, wherein the sensor module is connected with the wheel detection module through a signal line, the wheel detection module is wirelessly connected with the receiving processing module through a WIFI signal, and the wheel detection module is adhered to the surface of an airtight layer of the automobile tire. The wheel detection module is provided with an energy harvester, the lower layer flexible piezoelectric film group of the energy harvester utilizes the strong tension of a tire body and the change of the pressure in the tire when the tire moves to harvest energy, and the upper layer flexible piezoelectric film group generates approximate flutter through the piezoelectric film when the tire rolls and the vehicle body vibrates so as to harvest energy. The whole system reasonably utilizes the energy generated by the movement of the tires and the gravity of the vehicle body, does not need to be provided with batteries for the sensor and the signal generator, and has convenient installation, long service life and low cost.)

1. A passive monitoring system of an automobile tire is characterized by comprising a sensor module (1), a wheel detection module (2) and a receiving and processing module (3), the sensor module (1) is connected with the wheel detection module (2) through a signal line, the wheel detection module (2) is in wireless connection with the receiving processing module (3) through WIFI signals, the wheel detection module (2) is adhered to the surface of an airtight layer of an automobile tire, the wheel detection module (2) comprises an upper layer copper sheet (201), an elastic substrate (202), a lower layer flexible piezoelectric film (203), a lower layer copper sheet (206), a lower layer columnar capacitor (207), an upper layer columnar capacitor (208), an upper layer flexible piezoelectric film (209), a control electric plate (210), a signal generator (211) and a sensor (212), the lower-layer columnar capacitor (207) and the upper-layer columnar capacitor (208) are arranged on the upper surface and the lower surface of the control electric plate (210); the upper-layer copper sheets (201) are arranged on two sides of the upper-layer flexible piezoelectric film (209), and the lower-layer copper sheets (206) are arranged on two sides of the lower-layer flexible piezoelectric film (203); the lower flexible piezoelectric film (203) is fixed on the elastic substrate (202), and the elastic substrate (202) is tightly adhered to the airtight layer (6).

2. The passive monitoring system for the automobile tire according to claim 1, wherein a lower flexible piezoelectric diaphragm group is composed of 3-10 lower flexible piezoelectric diaphragms (203), and each flexible piezoelectric diaphragm is connected with the other flexible piezoelectric diaphragm group through the adhesive sheet (204).

3. The passive monitoring system for automobile tires according to claim 2, characterized in that, the upper layer flexible piezoelectric film group is composed of two pieces of upper layer flexible piezoelectric films (209), and holes for fixing the upper layer cylindrical capacitors (208) are provided on the electrode plates.

4. The passive monitoring system for vehicle tires according to claim 3, characterized in that the control circuit board (210) has integrated thereon an amplification circuit and a WIFI signal generator.

Technical Field

The invention relates to the field of automobile manufacturing, in particular to a passive monitoring system for automobile tires.

Background

At present, along with the improvement of the quality of life, automobiles are gradually popularized, and the pursuit of high comfort, high intelligence and low consumption of the automobiles is brought. The existing tire has popularized the original tire (vacuum tire) to bring great improvement to the riding comfort, but the phenomenon that the tire cannot give an alarm in time when the tire is not enough in air pressure and damaged still brings great potential safety hazard. Aiming at the phenomenon, the existing tire is internally provided with a sensor for detection, but the structure of the tire can be damaged more or less, and the replacement speed of a battery of the sensor is higher, so that great inconvenience and energy loss are brought.

Disclosure of Invention

In order to solve the above technical problems, the present invention provides a passive monitoring system for an automobile tire, so as to solve the problems listed in the background art.

A passive monitoring system of an automobile tire comprises a sensor module, a wheel detection module and a receiving processing module, wherein the sensor module is connected with the wheel detection module through a signal line, the wheel detection module is wirelessly connected with the receiving processing module through a WIFI signal, the wheel detection module is bonded on the surface of an air tight layer of the automobile tire, the wheel detection module comprises an upper copper sheet, an elastic substrate, a lower flexible piezoelectric film, a lower copper sheet, a lower columnar capacitor, an upper flexible piezoelectric film, a control electric plate, a signal generator and a sensor, and the lower columnar capacitor and the upper columnar capacitor are arranged on the upper surface and the lower surface of the control electric plate; the upper-layer copper sheets are arranged on both sides of the upper-layer flexible piezoelectric film, and the lower-layer copper sheets are arranged on both sides of the lower-layer flexible piezoelectric film; the lower layer flexible piezoelectric film is fixed on the elastic substrate, and the airtight layer of the elastic substrate is tightly adhered; the signal generator and the sensor are arranged on the control electric board.

Furthermore, the lower-layer flexible piezoelectric film group is composed of 3-10 pieces of lower-layer flexible piezoelectric films, and all the flexible piezoelectric films are connected through the adhesive sheets.

Furthermore, the upper layer flexible piezoelectric film group is composed of two upper layer flexible piezoelectric films, and holes for fixing the upper layer columnar capacitors are formed in the electrode plate.

Furthermore, an amplifying circuit and a WIFI signal generator are integrated on the control electric board.

Compared with the prior art, the invention has the following beneficial effects:

the wheel detection module is provided with an energy harvester, the lower layer flexible piezoelectric film group of the energy harvester utilizes the strong tension of a tire body and the change of the pressure in the tire when the tire moves to harvest energy, and the upper layer flexible piezoelectric film group generates approximate flutter through the piezoelectric film when the tire rolls and the vehicle body vibrates so as to harvest energy. The whole system reasonably utilizes the energy generated by the movement of the tires and the gravity of the vehicle body, does not need to be provided with batteries for the sensor and the signal generator, is convenient to install, has long service life and low cost, and thus achieves intelligent design indexes.

Drawings

FIG. 1 is a flow chart of the system control of the present invention;

FIG. 2 is an enlarged schematic circuit diagram of the control panel 210 according to the present invention;

fig. 3 is an exploded view of the wheel inspection module 2 of the present invention;

FIG. 4 is an installation schematic of an embodiment of the invention;

in the figure: 1. a sensor module; 2. a wheel detection module; 201. an upper copper sheet; 202. an elastic substrate; 203. a lower flexible piezoelectric film group; 204. an adhesive sheet; 205. a metal electrode; 206. a lower layer copper sheet; 207. a lower layer columnar capacitor; 208. an upper layer columnar capacitor; 209. an upper flexible piezoelectric film; 210. a control panel; 3. and a receiving processing module.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model provides a passive monitoring system of automobile tire, comprises sensor module 1, wheel detection module 2 and receipt processing module 3, is connected through the signal line between sensor module 1 and the wheel detection module 2, through WIFI signal wireless connection between wheel detection module 2 and the receipt processing module 3, and sensor module 1 and processing detection module 2 are installed in the automobile tire, and receipt processing module 3 sets up in the automobile main control board. The sensor module 1 comprises a plurality of sensors installed at different positions of a tire, the processing and detecting module 2 receives the information of the sensor module 1 and processes the information, the digital signals of the sensors are transmitted to the central processing computer of the receiving and processing module 3 through WIFI signals to be processed, and the processed signals are fed back to a driver through a display screen or sound.

The wheel detection module 2 attached to the surface of the tire airtight layer comprises an A/D converter, an MCU (micro control unit), a energy harvester and WIFI (wireless fidelity), wherein the energy harvester comprises an upper layer copper sheet 201, an elastic substrate 202, a lower layer flexible piezoelectric film 203, an adhesive sheet 204, a metal electrode 205, a lower layer copper sheet 206, a lower layer cylindrical capacitor 207, an upper layer cylindrical capacitor 208, an upper layer flexible piezoelectric film 209 and a control electric plate 210, and the elastic cylindrical capacitor with the charge and discharge functions is divided into the lower layer cylindrical capacitor 207 and the upper layer cylindrical capacitor 208 which are arranged on the upper surface and the lower surface of the control electric plate 210; the flexible piezoelectric film piezoelectric energy harvester comprises an upper layer flexible piezoelectric film group and a lower layer flexible piezoelectric film group; the two sides of the upper layer flexible piezoelectric film 209 are both provided with upper layer copper sheets 201, and the two sides of the lower layer flexible piezoelectric film 203 are both provided with lower layer copper sheets 206; the lower-layer flexible piezoelectric membrane group consists of 3-10 lower-layer flexible piezoelectric membranes 203, each flexible piezoelectric membrane is connected through an adhesive sheet 204, the lower-layer flexible piezoelectric membrane group is fixed on an elastic base plate 202, and the elastic base plate 202 is tightly adhered to an airtight layer of a tire; the upper layer flexible piezoelectric film group is two electrode plates consisting of an upper layer flexible piezoelectric film 209, and round holes on the electrode plates are used for fixing the upper layer columnar capacitor 208; an amplifying circuit is integrated on the control electric plate 210; the flexible piezoelectric film may be a PDEF material. In the driving process of an automobile, the gravity of the whole automobile is in a constantly changing process due to the unevenness of a road, the tire can also generate energy due to deformation and friction, the lower-layer flexible piezoelectric film group performs energy harvesting by utilizing the strong tension of a tire body and the change of the pressure in the tire when the tire moves, the upper-layer flexible piezoelectric film group generates approximate flutter energy harvesting by the piezoelectric film when the tire rolls and the automobile body vibrates, and the electric energy is stored through the rectifying circuit and the energy storage capacitor. This efficiently converts the energy of the tire into vibration-captured energy to power the monitoring device.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and it is to be understood that the invention is not limited thereto, but may be modified within the scope of the appended claims.