CN218381420U

CN218381420U - System for monitoring work of tire pressure sensor

Info

Publication number: CN218381420U
Application number: CN202222544501.9U
Authority: CN
Inventors: 何洋
Original assignee: Baolong Huofu Shanghai Electronics Co ltd
Current assignee: Baolong Huofu Shanghai Electronics Co ltd
Priority date: 2022-09-26
Filing date: 2022-09-26
Publication date: 2023-01-24
Anticipated expiration: 2032-09-26

Abstract

The utility model relates to a system for monitoring work of tire pressure sensor, including interconnected test module and test PC, test module installs in vehicle tire, and test module and tire pressure sensor are connected, and test module includes sampling interface, sampling circuit ADC, MCU and communication unit, and sampling interface and sampling circuit ADC are connected, and sampling circuit ADC and MCU are connected, and MCU and communication unit are connected; the testing module acquires a current signal of the tire pressure sensor through the sampling interface, the sampling circuit ADC is used for acquiring the current signal of the tire pressure sensor and converting the current signal into a digital signal and then transmitting the digital signal to the MCU, the MCU periodically transmits the acquired digital signal to the testing PC through the communication unit, and the testing PC is used for judging whether the tire pressure sensor is in a normal working state or not according to the received digital signal. The utility model provides a tire pressure sensor install inside the tire and the operating condition monitoring problem of tire under the rotation condition.

Description

System for monitoring work of tire pressure sensor

Technical Field

The utility model relates to a vehicle mounted sensor monitoring technology field especially relates to a system for be used for monitoring tire pressure sensor work.

Background

The built-in 3V lithium battery that all adopt of present direct type tire pressure sensor is 210Mah to 550mAH generally not equal, disposable, can not change, so the user state of tire pressure sensor in the use in the vehicle tire directly influences the life of product, consequently needs to monitor the operating condition of tire pressure sensor.

As shown in fig. 1, in a real vehicle, a technician mainly uses an RF receiving device disposed in the vehicle for testing the tire pressure sensor, monitors RF data of the tire pressure sensor, and determines whether the tire pressure sensor is working normally in a designed working mode through the RF data, but this conventional method cannot monitor a sleep state of the tire pressure sensor, and a working state when pressure, temperature, and acceleration are sampled periodically.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a system for monitoring tire pressure sensor work is provided, solve tire pressure sensor and install inside the tire and the operating condition monitoring problem of tire under the rotation condition.

The utility model provides a technical scheme that its technical problem adopted is: the system for monitoring the work of the tire pressure sensor comprises a testing module and a testing PC, wherein the testing module is connected with the testing PC, the testing module is installed in a vehicle tire and is connected with the tire pressure sensor, the testing module comprises a sampling interface, a sampling circuit ADC, an MCU and a communication unit, the sampling interface is connected with the sampling circuit ADC, the sampling circuit ADC is connected with the MCU, and the MCU is connected with the communication unit;

preferably, the test module acquires the current signal of the tire pressure sensor through the sampling interface, the sampling circuit ADC is configured to acquire the current signal of the tire pressure sensor, convert the current signal into a digital signal, and transmit the digital signal to the MCU, the MCU periodically transmits the acquired digital signal to the test PC through the communication unit, and the test PC is configured to determine whether the tire pressure sensor is in a normal operating state according to the received digital signal.

Preferably, the test module further includes an amplifying circuit, the amplifying circuit is connected to the sampling interface and the sampling circuit ADC, the amplifying circuit is configured to amplify the current signal sent by the sampling interface, and the sampling circuit ADC samples the amplified current signal and converts the current signal into a digital signal to the MCU.

Preferably, the sampling interface is located between a battery of the tire pressure sensor and a controller of the tire pressure sensor.

Preferably, the sampling circuit ADC and the MCU are connected through an IIC communication interface.

Preferably, the sampling circuit ADC is integrated in the MCU.

Preferably, the communication unit is integrated in the MCU.

Preferably, the communication unit is a bluetooth unit or an RF radio frequency transmitter.

Preferably, the tire pressure sensor includes a temperature sensor, an acceleration sensor, and a pressure sensor.

Advantageous effects

Since the technical scheme is used, compared with the prior art, the utility model, have following advantage and positive effect: the utility model discloses mainly solved tire pressure sensor and installed inside the tire and the operating condition monitoring problem under the rotation condition (especially tire pressure sensor does not send the work control when RF data gives RF receiving equipment, including the control of electric current, awaken the cycle control), provide more comprehensive reliable foundation for technical staff aassessment tire pressure sensor's reliability.

Drawings

Fig. 1 is a block diagram of a conventional system for monitoring operation of a tire pressure sensor in the background art;

fig. 2 is a block diagram of a system for monitoring operation of a tire pressure sensor according to an embodiment of the present invention;

fig. 3 is an internal structure view of the tire pressure sensor according to the embodiment of the present invention;

FIG. 4 is an internal structure diagram of a test module according to an embodiment of the present invention;

fig. 5 is a schematic view of the connection between the test module and the tire pressure sensor according to the embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the following specific examples. It should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

The utility model discloses an embodiment relates to a system for monitoring tire pressure sensor work, as shown in fig. 2 and fig. 4, including test module and test PC, test module and test PC connect, test module installs in vehicle tire, test module and tire pressure sensor are connected, test module includes sampling interface, sampling circuit ADC, MCU (main control unit), communication unit, memory cell and battery, sampling interface and sampling circuit ADC connect, sampling circuit ADC and MCU connect, MCU respectively with communication unit, memory cell and battery connection; the testing module obtains the current signal of the tire pressure sensor through the sampling interface, the sampling circuit ADC is used for collecting the current signal of the tire pressure sensor and converting the current signal into a digital signal and then transmitting the digital signal to the MCU, the MCU transmits the collected digital signal to the testing PC (namely a testing computer) periodically through the communication unit, and the testing PC is used for judging whether the tire pressure sensor is in a normal working state or not according to the received digital signal.

Optionally, the test module still includes amplifier circuit, can be convenient for MCU to carry out effective discernment to current signal, amplifier circuit is connected with sampling interface and sampling circuit ADC respectively, amplifier circuit is used for the current signal that the amplification sampling interface sent, current signal after sampling circuit ADC sampling is enlargied converts digital signal into for MCU. It should be noted that, when the MCU with higher precision and higher sensitivity is used in the present embodiment, the testing module does not need an additional amplifying circuit, which not only reduces the space of the testing module, but also improves the economic benefits.

Further, the sampling interface is located between the battery (positive or negative) of the tire pressure sensor and the controller of the tire pressure sensor, as shown in detail in fig. 5.

Furthermore, the sampling circuit ADC and the MCU are connected through an IIC communication interface.

Further, the communication unit may be integrated in the MCU, i.e. integral with the MCU; the communication unit may also be independent of and connected to the MCU. The communication unit includes but is not limited to a bluetooth unit (BLE) or an RF radio frequency transmitter, and the communication frequency of the RF radio frequency transmitter may be 433MHZ or 315MHZ.

Furthermore, the sampling circuit ADC is integrated in the MCU, so that the space of a test module can be reduced.

As shown in fig. 3, the tire pressure sensor includes a temperature sensor, an acceleration sensor, and a pressure sensor.

The operation of this embodiment is described in detail below:

in this embodiment, the test module and the tire pressure sensor are both installed in a vehicle tire, a sampling interface of the test module is connected in series to a battery anode (or a battery negative level) of the tire pressure sensor, the test module transmits a current signal of the tire pressure sensor under each working condition to the MCU through the sampling circuit and the amplifying circuit, the MCU stores the current signal in the storage unit in real time, and periodically transmits working information (e.g., voltage of the test module, working mode of the test module, maximum current value, etc.) of the test module to the test PC through the communication unit, a test technician can monitor the test PC through an upper computer on the test PC in a vehicle driving state (i.e., in a vehicle tire rotation state), and after the test is completed, the test PC can read current information of the tire pressure sensor in all test processes in the storage unit through the communication interface, thereby facilitating a technician to analyze whether the tire pressure sensor works normally under a real vehicle road test condition.

The test PC can be concluded by analyzing the current information as follows: (1) Whether the monitoring period of the tire pressure sensor is normal or not and whether the current is normal or not are judged; (2) Whether the emission period and the current of the tire pressure sensor are normal or not is judged, and therefore whether abnormal currents exist in the tire pressure sensor or not is judged.

The utility model discloses mainly solved the tire pressure sensor install in the tire inside to operating condition monitoring problem under the rotation condition, especially the tire pressure sensor does not send the work control when RF data gives RF receiving equipment, including the control of electric current, the tire pressure sensor awakens the periodic monitoring (awaken the work of tire pressure sensor every time, the electric current that corresponds can be different, can realize awakening the periodic control), provides more comprehensive reliable foundation for technical staff aassessment tire pressure sensor's reliability.

The foregoing description of specific exemplary embodiments of the invention has been presented for the purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. A system for monitoring the work of a tire pressure sensor is characterized by comprising a testing module and a testing PC, wherein the testing module is connected with the testing PC, the testing module is installed in a vehicle tire and connected with the tire pressure sensor, the testing module comprises a sampling interface, a sampling circuit ADC, an MCU and a communication unit, the sampling interface is connected with the sampling circuit ADC, the sampling circuit ADC is connected with the MCU, and the MCU is connected with the communication unit;

the testing module acquires the current signal of the tire pressure sensor through the sampling interface, the sampling circuit ADC is used for acquiring the current signal of the tire pressure sensor, converting the current signal into a digital signal and then transmitting the digital signal to the MCU, the MCU is used for periodically transmitting the acquired digital signal to the testing PC through the communication unit, and the testing PC is used for judging whether the tire pressure sensor is in a normal working state or not according to the received digital signal.

2. The system for monitoring the operation of the tire pressure sensor according to claim 1, wherein the testing module further comprises an amplifying circuit, the amplifying circuit is respectively connected with the sampling interface and the sampling circuit ADC, the amplifying circuit is used for amplifying the current signal sent by the sampling interface, and the sampling circuit ADC samples the amplified current signal and converts the current signal into a digital signal to the MCU.

3. The system for monitoring the operation of a tire pressure sensor according to claim 1, wherein the sampling interface is located between a battery of the tire pressure sensor and the tire pressure sensing controller.

4. The system for monitoring the operation of a tire pressure sensor according to claim 1, wherein the sampling circuit ADC and the MCU are connected via an IIC communication interface.

5. The system for monitoring the operation of a tire pressure sensor according to claim 1, wherein the sampling circuit ADC is integrated in the MCU.

6. The system for monitoring operation of a tire pressure sensor according to claim 1, wherein the communication unit is integrated in the MCU.

7. The system for monitoring the operation of a tire pressure sensor according to claim 1, wherein said communication unit is a bluetooth unit or an RF radio frequency transmitter.

8. The system for monitoring operation of a tire pressure sensor of claim 1, wherein the tire pressure sensor includes a temperature sensor, an acceleration sensor, and a pressure sensor.