WO2019051999A1

WO2019051999A1 - Tire pressure sensor and tire pressure data query method

Info

Publication number: WO2019051999A1
Application number: PCT/CN2017/112077
Authority: WO
Inventors: 伍宗仁; 何冰雷
Original assignee: 深圳市永奥图电子有限公司
Priority date: 2017-09-13
Filing date: 2017-11-21
Publication date: 2019-03-21
Also published as: CN107599758A

Abstract

Disclosed is a tire pressure sensor, comprising: a near-field communication module (101), a temperature detection module (102), a pressure detection module (103) and a processing module (104), wherein the near-field communication module (101) is connected to the processing module (104) and is used for receiving a near-field communication signal sent by a terminal, converting the near-field communication signal into a voltage signal and sending the voltage signal to the processing module (104); the temperature detection module (102) is connected to the processing module (104) and is used for receiving the voltage signal and detecting the temperature of a tire; the pressure detection module (103) is connected to the processing module (104) and is used for receiving the voltage signal and detecting the pressure of the tire; and the processing module (104) is used for receiving the voltage signal, acquiring a temperature signal and a pressure signal according to the voltage signal, converting the temperature signal and the pressure signal into a temperature value and a pressure value and sending the temperature value and the pressure value to the terminal by means of the near-field communication module so as to display same to a user. Also provided is a tire pressure data query method.

Description

Tire pressure sensor and tire pressure data query method

The invention belongs to the technical field of automobiles, and in particular relates to a tire pressure sensor and a tire pressure data query method.

With the development of society, the popularity of automobiles, safe driving is becoming more and more important. Tire Pressure Monitoring System (Tire Pressure Monitoring System (TPMS) is a wireless transmission technology that uses high-sensitivity micro wireless sensor devices fixed in automobile tires to collect data such as tire pressure and temperature during driving or stationary, and transmit the data to In the main engine of the cab, the vehicle tire pressure and temperature are displayed in real time in digital form, and the vehicle active safety system is alerted to the driver in the form of buzzer or voice in the event of an abnormal tire (preventing a puncture). The use of a tire pressure monitoring system ensures that the pressure and temperature of the tire are maintained within the standard range, reducing the probability of punctures, damage, and fuel consumption and damage to vehicle components.

The TPMS typically includes a tire pressure master display and a tire pressure sensor. The tire pressure display is used to display the parameters of each tire during operation. The tire pressure sensor is used to detect the tire running data. Among them, the tire pressure sensor is composed of a pressure sensor, a temperature sensor, a low frequency sensor, a high frequency emission sensor, a Microelectronics Processor (MCU), and a power module.

The existing tire pressure sensor has a large volume and is inconvenient to install due to the inclusion of the above plurality of sensors. Power supply through the power module may cause the battery to be exhausted and need to be charged, which complicates the daily maintenance process and the existing tire pressure. The sensor must view the tire pressure data through the tire pressure master display, which not only makes the tire pressure system complex, but also increases the cost.

Summary of the invention

The invention provides a tire pressure sensor and a tire pressure data query method, which aims to solve the problem that the existing tire pressure sensor comprises a plurality of sensors, which makes the volume large and inconvenient to install, and the power supply through the power module may be exhausted. The need for charging, the problem of complicated daily maintenance process, and the tire pressure data through the tire pressure host display screen make the tire pressure system complex and costly.

A first aspect of the present invention provides a tire pressure sensor including: a near field communication module, a temperature detection module, a pressure detection module, and a processing module;

The near field communication module is connected to the processing module, configured to receive a near field communication signal sent by the terminal, convert the near field communication signal into a voltage signal, and send the voltage signal to the processing module;

The temperature detecting module is connected to the processing module, configured to receive the voltage signal, and detect a temperature of the tire;

The pressure detecting module is connected to the processing module for receiving the voltage signal and detecting the pressure of the tire;

The processing module is configured to receive the voltage signal, and acquire a signal of the temperature and a signal of the pressure according to the voltage signal, and convert the signal of the temperature and the signal of the pressure into a temperature value and a pressure value, and the temperature value and the pressure value are transmitted to the terminal through the near field communication module for display to a user.

A second aspect of the present invention provides a method for querying tire pressure data, the method being applied to the tire pressure sensor provided by the first aspect of the present invention, the method comprising:

Receiving a near field communication signal sent by the terminal, and generating a voltage signal;

Obtaining a temperature signal and a pressure signal of the tire according to the voltage signal, and converting the temperature signal and the pressure signal into a temperature value and a pressure value;

The temperature value and the pressure value are sent to the terminal for display to the user.

The invention provides a tire pressure sensor and a tire pressure data query method, by adding a near field communication module to a tire pressure sensor, when the terminal transmits a near field communication signal, the excitation voltage signal can supply power to each module in the tire pressure sensor. , the power module is omitted. By using the near field communication module to send the temperature value and the pressure value to the terminal, the low frequency sensor, the high frequency sensor and the host display screen can be omitted, which not only reduces the volume of the tire pressure sensor, but also simplifies the daily maintenance operation and saves the cost.

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 description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is some embodiments of the invention.

1 is a schematic structural view of a tire pressure sensor according to a first embodiment of the present invention;

2 is a schematic structural view of a tire pressure sensor according to a second embodiment of the present invention;

3 is a schematic diagram showing an implementation flow of a tire pressure data query method according to a third embodiment of the present invention;

4 is a schematic flow chart showing an implementation process of a tire pressure data query method according to a fourth embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. The embodiments are merely a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a tire pressure sensor according to a first embodiment of the present invention. The tire pressure sensor shown in FIG. 1 mainly includes a near field communication module 101, a temperature detecting module 102, a pressure detecting module 103, and The processing module 104, wherein the near field communication module 101 is connected to the processing module 104, and the processing module 104 is further connected to the temperature detecting module 102 and the pressure detecting module 103, respectively. The functions of the above modules are as follows:

The near field communication module 101 is configured to receive a near field communication signal sent by the terminal, convert the near field communication signal into a voltage signal, and send the voltage signal to the processing module 104.

When the terminal transmits the near field communication signal, that is, the RF field is generated in the region where the antenna ANT of the tire pressure sensor is located, the near field communication module 101 generates a voltage signal according to the inductance mutual coupling principle by using the built-in antenna, and transmits the voltage signal to the processing module 104.

The temperature detecting module 102 is configured to receive the voltage signal and detect the temperature of the tire.

The pressure detecting module 103 is configured to receive the voltage signal and detect the pressure of the tire.

The processing module 104 is configured to receive the voltage signal, and obtain a signal of a temperature signal and a pressure according to the voltage signal, and convert the signal of the temperature and the signal of the pressure into a temperature value and a pressure value, and combine the temperature value and The pressure value is sent to the terminal through the near field communication module 101 for display to the user.

The chip-to-temperature signal and pressure signals built into the processing module 104 are converted into digital signals, and the temperature values and pressure values are calculated using a preset formula.

The tire pressure sensor provided by the invention adds a near field communication module to the tire pressure sensor. When the terminal transmits the near field communication signal, the excitation voltage signal can supply power to each module in the tire pressure sensor, and the power module is omitted. . The near field communication module is used to send the temperature value and the pressure value to the terminal, eliminating the low frequency sensor, the high frequency sensor and the host display screen, which not only reduces the volume of the tire pressure sensor, but also simplifies the daily maintenance operation and saves the cost.

Referring to FIG. 2, FIG. 2 is a schematic structural diagram of a tire pressure sensor according to a second embodiment of the present invention. The tire pressure sensor shown in FIG. 2 mainly includes a near field communication module 201, a temperature detecting module 202, and a pressure detecting module 203. The processing module 204 and the filtering module 205. The near field communication module 201 includes an antenna ANT, a near field capacitor C1, and a near field communication chip U1. The pressure detecting module 203 includes a pressure detecting chip U2 and a third resistor R3. The processing module 204 includes: a processing chip U3, and a first The resistor R1 and the second resistor R2, the temperature detecting module 202 is a thermistor R4, and the filtering module 205 includes a filter capacitor C2 and a polarity capacitor C3. The functions of each module are as follows:

The near field communication module 201 is configured to receive the near field communication signal sent by the terminal, convert the near field communication signal into a voltage signal, and send the voltage signal to the processing module 204.

Further, the near field communication module 201 includes an antenna ANT, a near field capacitance C1, and a near field communication chip U1. Wherein, the two ends of the antenna ANT are respectively connected with the antenna coil of the near field communication chip U1 (Antenna) Coils, AC) Pin AC0 pin and AC1 pin are connected. The two ends of the near-field capacitor C1 are respectively connected to the two ends of the antenna ANT. The ground pin VSS of the field communication chip U1 is grounded, and the power output (Energy) Harvesting, V_EH) pin, interrupt output pin (Interrupt Output, GPO) pin, serial clock input (Serial The Clock, SCL) pin and serial data input/output (SDA) pins are coupled to the processing module 204.

When the terminal transmits the near field communication signal, that is, the RF field is generated in the region where the antenna ANT of the tire pressure sensor is located, the antenna ANT generates a voltage signal by using the principle of mutual inductance coupling, and transmits the voltage signal to the near field communication chip U1 to supply power to the entire circuit. . Specifically, the model of the near field communication chip U1 is: IC8_ST25DV04K/UFDFN8.

The temperature detecting module 202 is configured to receive a voltage signal and detect the temperature of the tire.

Specifically, the temperature detecting module 202 is a thermistor R4. One end of the thermistor R4 is connected to the processing module 204, and the other end is grounded. The temperature detecting module 202 starts detecting the temperature of the tire after receiving the voltage signal.

The pressure detecting module 203 is configured to receive a voltage signal and detect the pressure of the tire.

Further, the pressure detecting module 203 pressure detecting chip U2 and third resistor R3;

The ground pin GND, the dangling pin NC, the signal negative pin -SIG, the signal positive pin -SIG, and the power positive pin + VEXC pin of the pressure detecting chip U2 are all connected to the processing module 204, and the power detecting positive electrode of the pressure detecting chip The pin +VEXC is connected to one end of the third resistor R3, and the other end of the third resistor R3 is connected to the processing module 204.

It should be noted that the floating pin NC and the ground pin GND are grounded by being connected to the processing module 204 to stabilize the pressure detected by the pressure detecting module 203.

Specifically, the model of the pressure detecting chip U2 is US9011.

The processing module 204 is configured to receive a voltage signal, and obtain a signal of a temperature signal and a pressure according to the voltage signal, and convert the signal of the temperature signal and the pressure into a temperature value and a pressure value, and pass the temperature value and the pressure value through the near field The communication module 201 transmits to the terminal for display to the user.

Further, the processing module 204 includes: a processing chip U3, a first resistor R1 and a second resistor R2, wherein the first digital input/output pin PT0 pin and the second digital input/output pin PT1 of the processing chip U3 are processed. The third digital input/output pin PT2 and the power supply pin VDD are sequentially connected to the SDA pin, the SCL pin, and the GPO pin and the V_EH pin of the near field communication chip U1, respectively, and the AI2 pin of the processing chip is The thermistor R4 is connected, and the AI0 pin of the processing chip U3, the second sensing input pin AI1, and the power supply pin VREFP are sequentially connected to the signal negative pin SIG of the pressure detecting chip U2, the signal positive pin + SIG, and The positive pole of the power supply is connected to the VEXC, and the sensing grounding pin VREFN of the processing chip U3 is also connected to the grounding pin GND of the pressure detecting chip U2 and the floating pin NC, and the third sensing input pin AI2 of the processing chip U3 is cited. The pin is connected to the other end of the third resistor R3, and the SDA pin of the processing chip U3 is connected to one end of the first resistor R1, and the fourth digital input/output pin PT3 pin and the fourth sensing input pin of the processing chip U3 are processed. AI3 is sequentially connected to both ends of the second resistor, first The other end of the resistor R1, the resistor R2 and the fourth end of the second sensing pin input AI3 processing chip U3 is also connected to ground.

Specifically, the processing chip U3 acquires a signal of a temperature signal and a pressure according to the voltage signal, and converts the signal of the temperature signal and the pressure into a temperature value and a pressure value, and transmits the temperature value and the pressure value to the near field communication module 101. terminal. The model of the processing chip U3 is IC16_HY14E10 / QFN.

Further, the processing module 204 is further configured to calculate a variance of the voltage signal value received within the preset time period, and determine whether the variance is greater than a preset value. If less, obtain the signal of the temperature and the signal of the pressure.

Specifically, the processing chip U3 calculates a variance of the voltage signal value in the preset time period, and determines whether the variance is greater than a preset value, and acquires a signal of the temperature signal and the pressure.

It should be noted that the processing chip U3 calculates the variance of the voltage signal value in the preset time period, and compares the variance with the preset value to determine whether the voltage signal is stable within the preset time period, and avoids instability due to the voltage signal. The acquired temperature signal and pressure signal are unstable, affecting the accuracy of temperature and pressure values.

Further, the processing module 204 is further configured to generate prompt information if the variance is greater than a preset value, and send the prompt information to the near field communication module 201.

The prompt message is information indicating that the tire pressure data failed to be obtained. The prompt information may be text information, image information, or an instruction for causing the terminal to generate text information or image information. When the variance is greater than the preset value, the voltage signal is unstable, and the processing module 204 generates the prompt information to be sent to the near field communication module 201. Specifically, the processing chip U3 generates prompt information and sends the information to the near field communication chip U1 in the near field communication module 201.

The near field communication module 201 is further configured to receive the prompt information and forward the information to the terminal to prompt the user that the tire pressure data acquisition fails.

Specifically, the near field communication chip U1 receives the prompt information and transmits it to the terminal through the antenna ANT.

Further, the tire pressure sensor further includes: a filtering module 205,

The filtering module 205 is configured to filter the power signal.

Further, the filtering module 205 includes a filter capacitor C2 and a polarity capacitor C3, wherein one end of the filter capacitor C2 is connected to the V_EH pin of the near field communication chip U1, the power pin VDD of the processing chip U3, the analog power pin VDDA, and the pole. The positive terminal of the capacitive capacitor C3 is connected, and the other end of the smoothing capacitor C2 is respectively connected to and grounded to the negative terminal of the polar capacitor C3.

The principle of the circuit diagram of the present invention is: the antenna ANT receives the near field communication signal sent by the terminal, and transmits the near field communication signal to the near field communication chip U1. The near field communication chip U1 excites the power signal and transmits the power signal to the processing chip U3. The thermistor R4 and the pressure detecting chip U2 supply power to detect the temperature and pressure of the thermistor R4 and the pressure detecting chip U2. At the same time, the processing chip U3 determines whether the excited power signal is stable within a preset time period, and if stable, acquires a signal of the temperature and the pressure of the thermistor R4 and the pressure detecting chip U2, and processes the signal. The temperature value and the pressure value are obtained, and the temperature value and the pressure value are sent to the near field communication chip U1 to be transmitted to the terminal through the antenna ANT, and displayed to the user.

Referring to FIG. 3, FIG. 3 is a schematic flowchart diagram of a tire pressure data query method according to a third embodiment of the present invention, and the tire pressure data query method illustrated in FIG. 3 is applied to the tires provided by the first and second embodiments of the present invention. Pressure sensor, the method mainly includes:

S301. Receive a near field communication signal sent by the terminal, and generate a voltage signal.

S302. Acquire a temperature signal and a pressure signal of the tire according to the voltage signal, and convert the temperature signal and the pressure signal into a temperature value and a pressure value;

S303. Send the temperature value and the pressure value to the terminal for display to the user.

The tire pressure data query method provided by the embodiment of the invention generates a voltage signal by receiving a near field communication signal sent by the terminal, and can supply power to each module in the tire pressure sensor, thereby eliminating the power module. Sending temperature and pressure values to the terminal eliminates the need for low frequency sensors, high frequency sensors, and host display screens, which not only reduces the size of the tire pressure sensor, but also simplifies routine maintenance operations and saves costs.

Referring to FIG. 4, FIG. 4 is a schematic flowchart diagram of a tire pressure data query method according to a fourth embodiment of the present invention, and the tire pressure data query method illustrated in FIG. 4 is applied to the tires provided by the first and second embodiments of the present invention. Pressure sensor, the method mainly includes:

S401. Receive a near field communication signal sent by the terminal, and generate a voltage signal.

The near field communication signal is an RF field emitted by the terminal such that the antenna of the tire pressure sensor generates a voltage signal using the principle of inductive mutual coupling to supply power to the circuit in the tire pressure sensor.

S402. Calculate a variance of a voltage signal value received within a preset time period, and determine whether the variance is greater than a preset value;

By judging the variance of the voltage signal values received within the preset time period, it can be determined whether the generated voltage signal is stable, and the unstable voltage signal is avoided to make the acquired temperature signal and the pressure signal inaccurate.

S403. If less than, obtain the temperature signal and the pressure signal;

S404, converting the temperature signal and the pressure signal into a temperature value and a pressure value;

The tire pressure sensor converts the temperature signal and the pressure signal into temperature values and pressure values using a preset algorithm.

S405: Send the temperature value and the pressure value to the terminal for display to the user;

S406. If greater than, generate prompt information.

The prompt message is information indicating that the tire pressure data failed to be obtained. The prompt information may be text information, image information, or an instruction for causing the terminal to generate text information or image information.

S407. Send the prompt information to the terminal to prompt the user to obtain the tire pressure data.

For the details of the present embodiment, please refer to the embodiment shown in FIG. 1 and FIG. 2, and details are not described herein again.

In the various embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules is only a logical function division. In actual implementation, there may be another division manner, for example, multiple modules or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication link shown or discussed may be an indirect coupling or communication link through some interface, device or module, and may be in an electrical, mechanical or other form.

The modules described as separate components may or may not be physically separated. The components displayed as modules may or may not be physical modules, that is, may be located in one place, or may be distributed to multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules.

The integrated modules, if implemented in the form of software functional modules and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read only memory (ROM, Read-Only) Memory, random access memory (RAM), disk or optical disk, and other media that can store program code.

It should be noted that, for the foregoing method embodiments, for the sake of brevity, they are all described as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Because certain steps may be performed in other sequences or concurrently in accordance with the present invention. In the following, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the above embodiments, the descriptions of the various embodiments are all focused, and the parts that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

The above is a description of the method, device and system for the receiver identification provided by the present invention. For those skilled in the art, according to the idea of the embodiment of the present invention, there will be changes in the specific implementation manner and application scope. The contents of this specification are not to be construed as limiting the invention.

Claims

A tire pressure sensor, characterized in that: the tire pressure sensor comprises: a near field communication module, a temperature detection module, a pressure detection module and a processing module;
The near field communication module is connected to the processing module, configured to receive a near field communication signal sent by the terminal, convert the near field communication signal into a voltage signal, and send the voltage signal to the processing module;
The temperature detecting module is connected to the processing module, configured to receive the voltage signal, and detect a temperature of the tire;
The pressure detecting module is connected to the processing module for receiving the voltage signal and detecting the pressure of the tire;
The processing module is configured to receive the voltage signal, and acquire a signal of the temperature and a signal of the pressure according to the voltage signal, and convert the signal of the temperature and the signal of the pressure into a temperature value and a pressure value, and the temperature value and the pressure value are transmitted to the terminal through the near field communication module for display to a user.
The tire pressure sensor according to claim 1, wherein
The processing module is further configured to calculate a variance of the voltage signal value received within the preset time period, and determine whether the variance is greater than a preset value, and if less, acquire the signal of the temperature and the signal of the pressure.
The tire pressure sensor according to claim 2, wherein
The processing module is further configured to: if greater than, generate prompt information, and send the information to the near field communication module;
The near field communication module is further configured to receive the prompt information, and forward the information to the terminal to prompt the user to obtain tire pressure data acquisition failure.
The tire pressure sensor according to claim 1, wherein the near field communication module comprises: an antenna, a near field capacitor, and a near field communication chip;
Two ends of the antenna are respectively connected to two antenna coil pins of the near field communication chip;
Two ends of the near field capacitor are respectively connected to both ends of the antenna;
The ground pin of the near field communication chip is grounded, and a power output pin, an interrupt output pin, a serial clock input pin, and a serial data input/output pin are connected to the processing module.
The tire pressure sensor according to claim 4, wherein the processing module comprises: a processing chip, a first resistor and a second resistor;
a first digital input/output pin of the processing chip is coupled to the serial data input/output pin, and a second digital input/output pin of the processing chip is coupled to the serial clock input pin, a third digital input/output pin of the processing chip is connected to the interrupt output pin, and a power pin and an analog power pin of the processing chip are connected to the power output pin, and the processing chip is The third sensing input pin is connected to the temperature detecting module, and the third sensing input pin, the first sensing input pin, the sensing grounding pin, the second sensing input pin of the processing chip, The power pin is connected to the pressure detecting module, and the fourth digital input/output pin and the fourth sensing input pin of the processing chip are respectively connected to two ends of the second resistor, and the processing chip string is a row data input/output pin connected to one end of the first resistor;
The other end of the first resistor is grounded;
The end of the second resistor connected to the fourth sensing input pin AI3 is also grounded.
The tire pressure sensor according to claim 5, wherein the temperature detecting module is a thermistor;
One end of the thermistor is connected to the third sensing input pin, and the other end is grounded.
The tire pressure sensor according to claim 5, wherein the pressure detecting module comprises: a pressure detecting chip and a third resistor;
A ground pin and a floating pin of the pressure detecting chip are connected to the sensing ground pin, and a signal negative pin of the pressure detecting chip is connected to the first sensing input pin, and the pressure detecting is performed. a signal positive pin of the chip is connected to the second sensing input pin, and a power positive pin of the pressure detecting chip is connected to one end of the third resistor and the power pin of the processing chip;
The other end of the third resistor is connected to the second sensing input pin.
A method for inquiring tire pressure data, wherein the method is applied to the tire pressure sensor according to any one of claims 1 to 7, the method comprising:
Receiving a near field communication signal sent by the terminal, and generating a voltage signal;
Obtaining a temperature signal and a pressure signal of the tire according to the voltage signal, and converting the temperature signal and the pressure signal into a temperature value and a pressure value;
The temperature value and the pressure value are sent to the terminal for display to the user.
The query method according to claim 8, wherein the obtaining the detected temperature signal and the pressure signal according to the voltage signal comprises:
Calculating a variance of the voltage signal value received within the preset time period, and determining whether the variance is greater than a preset value;
If less than, the temperature signal and the pressure signal are acquired.
The query method according to claim 9, wherein calculating the variance of the voltage signal value received in the preset time period and determining whether the variance is greater than a preset value further comprises:
If it is greater, generate prompt information;
Sending the prompt information to the terminal to prompt the user to obtain the tire pressure data fails.