CN203004989U - Compound type TPMS (Tire Pressure Monitor System) - Google Patents

Abstract

The utility model discloses a compound type TPMS (Tire Pressure Monitor System). The compound type TPMS comprises tire pressure sensor modules and a compound type tire pressure receiving module, wherein each tire pressure sensor module is used for detecting the temperature and pressure of the interior of a tire, encoding detected information through an MCU (Microprogrammed Control Unit) and transmitting the detected information through a radio-frequency transmitting antenna with the transmitting frequency of 433.92MHz in a wireless radio frequency manner, and the compound type tire pressure receiving module is arranged in a cab and is used for receiving the information of the tire pressure sensor modules, reading rotating speed information of an anti-locked braking system, comparing rotating speed information of two coaxial tires, working out pressure information of coaxial tires without pressure sensors through software simulation, reading corner information of a steering wheel of an electric power steering system, filtering out false alarm information, reading mileage information and recording the state of failure occurrence in real time and diagnosing trouble codes. Compared with a conventional TPMS, the compound type TPMS disclosed by the utility model has the advantages of being capable of reducing manufacturing cost and reducing false alarm.

Description

Compound type TPMS system

Technical field

The utility model relates to vehicle electric field, particularly relates to a kind of compound type TPMS system.

Background technology

Tire is the important component part of automobile chassis, and as important supporting member and walking element, tire is not only carrying the all-mass of automobile, and also will advance to automobile provides propulsive force, plays simultaneously the effect that relaxes ground shock.Tire all plays a part very crucial to the economy of road-holding property, ride comfort, safety, traveling comfort and the fuel oil of automobile.

In order to guarantee vehicle safety travel, current method is that tire pressure monitoring system (TPMS) is installed on automobile now, the parameters such as air pressure of Real-Time Monitoring tire, for the low tire pressure that causes because of tire flat, and Yin Gaowen, high tire pressure and easily produce the situation of blowing out, show and report to the police with visual signal or audible signal.The safety of running car can be improved like this, and the energy consumption because of the not enough tire accelerated wear test that causes of air pressure and reduction vehicle can be reduced.Existing TPMS receiver module receives the high-frequency signal that each tire sensor is launched, and high-frequency signal is resolved, and issues display unit, needs like this each tire mounting tyre pressure sensor, and cost is high.

Existing TPMS mainly is divided into direct-type TPMS and indirect type TPMS;

The shortcoming of direct-type TPMS is: manufacturing cost is high, and module is fragile, and complexity is installed, and needs to adjust tire dynamic and balance; Sensor collection wheel tire pressure information easily is subject to the road conditions impact, and receiver module directly decodes, and easily causes flase alarm.

The shortcoming of indirect type TPMS is: install complicated, can not display of tyre pressure, the precision of monitoring is inadequate, just the result of an estimation, only have when the tire pressure wretched insufficiency just can detect;

When the system alarm low tyre, can't show that concrete which tire goes wrong, and gets four tires are detected one by one and could determine; Atmospheric pressure value that at ordinary times can't display of tyre only when reporting to the police, just has the appearance of caution symbol, and can't accomplish to monitor to high pressure and high temperature; Vehicle is under static state, and when low speed driving, or system is inoperative when the road traveling of the recessed injustice in hole; When four the tires while, air pressure was not enough, for example when the Growth season temperature traverse, system can't inform;

Easily cause wrong report when changing spare tyre, because not wearing and tearing of spare tyre, diameter is larger than other tires; When changing mud-and-snow tyre, easily cause wrong report, because mud-and-snow tyre is larger than the diameter of conventional tyre;

With speed turning faster the time, easily cause wrong report, because the rotating speed of outside tire is greater than inside tire;

Tyre slip can cause that the rotating speed of several tires is different, also can cause flase alarm.

The utility model content

The technical problems to be solved in the utility model is to provide a kind of compound type TPMS system that can reduce manufacturing cost and false alarm reduction police.

For solving the problems of the technologies described above, compound type TPMS of the present utility model system comprises:

The tyre pressure sensor module detects tire internal temperature, pressure, and the information that detects is encoded through MCU, launches with wireless radio frequency mode by the radio-frequency transmissions antenna, and transmitting frequency is 433.92MHz;

Compound type tire pressure receiver module is installed in operator's compartment, is used for receiving the information of tyre pressure sensor module, read the anti-lock braking system rotary speed information, more coaxial two tire rotational speed information by software emulation, can calculate the coaxial tire pressure information that tyre pressure sensor is not installed; Read electric boosting steering system steering wheel angle information, filtering flase alarm information; Read mileage information, the state that the real time recording fault occurs, record diagnosis failure code.

Further, described compound type TPMS system comprises 2 described tyre pressure sensor modules, adopts the diagonal angle mounting means to be installed in two tires.

Described compound type tire pressure receiver module comprises:

Receiver Module is connected with the MCU module, is used for receiving the radio-frequency information that tyre pressure sensor sends;

The data communication module is connected with the MCU module, is used for gathering car load anti-lock braking system speed information, electric boosting steering system steering wheel angle information, instrument mileage information and the information that receives is sent to the car load bus;

The MCU module, tyre pressure sensor is carried out receipt decoding by the signal that radio-frequency antenna sends out, obtain anti-lock brake tach signal and electric boosting steering system steering wheel angle signal from vehicle-mounted bus, through calculating, the entire vehicle tyre state is sent to the data communication module;

And power management module, it is Receiver Module, data communication module and MCU module for power supply.

Compound type TPMS of the present utility model system receives the tyre pressure sensor module information that is arranged on automobile antero posterior axis diagonal position by compound type tire pressure receiver module, read anti-lock braking system ABS tire rotational speed information, read electric boosting steering system EPS steering wheel angle information, calculate the tire pressure value that two-wheeled is not installed by simulation software, then the data of handling well are sent on automobile bus, shown by instrument, show and report to the police with visual signal or audible signal.

Only need fill two tyre pressure sensor modules just can monitor the manufacturing cost that the information of four tires has reduced the TPMS system on a car in compound type TPMS of the present utility model system, adopt four tires of two tyre pressure sensor monitoring, effectively reduce the co-channel interference probability, reduced system's error probability, and adopt four tires of two tyre pressure sensor monitoring, simple in structure, Assembly ﹠Disassembly is easier; The utility model gathers the electronic power assist steering EPS of system steering wheel angle information, carry out algorithm process, effective filtering flase alarm information, simultaneously the utility model utilization read anti-lock braking system ABS tire rotational speed information can to two above tires simultaneously the situation of deficencys and the situation that speed surpasses 100Km/h judge, for safe driving provides powerful guarantee.

Description of drawings

Below in conjunction with accompanying drawing and the specific embodiment, the utility model is described in further detail:

Fig. 1 is system architecture schematic diagram of the present utility model.

Fig. 2 is the structural representation of the utility model compound type tire pressure receiver module.

Description of reference numerals

A, C are the tire pressure monitoring sensor modules

B, D are A, C tire pressure monitoring sensor module coaxial wheels fetal positions, and A, C tire pressure monitoring sensor module can calculate the tire pressure information of coaxial B, D position by software emulation

E, F, G, H are the ABS tachogens

I is the EPS steering wheel angle sensor

J is compound type tire pressure receiver module

K is the vehicle-mounted CAN bus

L is the radiofrequency signal that tire pressure monitoring sensor sends

M is power management module

N is Receiver Module

O is the data communication module

P is the MCU module

Q is receiving wire

The specific embodiment

As shown in Figure 1, compound type TPMS of the present utility model system comprises: tyre pressure sensor modules A, C, detect tire internal temperature, pressure, and the information that detects is encoded through MCU, to launch with wireless radio frequency mode by the radio-frequency transmissions antenna, transmitting frequency is 433.92MHz;

Compound type tire pressure receiver module J, be installed in operator's compartment, be used for receiving the information of tyre pressure sensor modules A, C, read anti-lock braking system tachogen E, F, G, H rotary speed information, more coaxial two tire rotational speed information, by software emulation, can calculate the coaxial tire pressure information that tyre pressure sensor is not installed; Read electric boosting steering system steering wheel angle sensor I steering wheel angle information, filtering flase alarm information; Read mileage information, the state that the real time recording fault occurs, record diagnosis failure code.

Wherein, described compound type TPMS system comprises 2 described tyre pressure sensor modules A, C, adopts the diagonal angle mounting means to be installed in two tires.

As shown in Figure 2, described compound type tire pressure receiver module comprises:

Receiver Module N, P is connected with the MCU module, is used for receiving the radio-frequency information that tyre pressure sensor A, C send;

Data communication module O, P is connected with the MCU module, be used for to gather the car load anti-lock braking system tachogen E, F, G, H rotary speed information and electric boosting steering system steering wheel angle sensor I steering wheel angle information and the information that receives is sent to the car load instrument;

MCU module P, tyre pressure sensor A, C are carried out receipt decoding by the signal that radio-frequency antenna sends out, obtain from vehicle-mounted CAN bus K anti-lock braking system tachogen E, F, G, H rotary speed information and the electric boosting steering system steering wheel angle sensor I steering wheel angle information of reading, through calculating, the entire vehicle tyre state is sent by vehicle-mounted CAN bus K;

Power management module M, it is Receiver Module N, data communication module O and MCU module P power supply.

Below through the specific embodiment and the embodiment the utility model is had been described in detail, but these are not to consist of restriction of the present utility model.In the situation that do not break away from the utility model principle, those skilled in the art also can make many distortion and improvement, and these also should be considered as protection domain of the present utility model.

Claims (3)

1. a compound type TPMS system, is characterized in that, comprising:

The tyre pressure sensor module detects tire internal temperature, pressure, and the information that detects is encoded through MCU, launches with wireless radio frequency mode by the radio-frequency transmissions antenna, and transmitting frequency is 433.92MHz;

Compound type tire pressure receiver module is installed in operator's compartment, is used for receiving the information of tyre pressure sensor module, read the anti-lock braking system rotary speed information, more coaxial two tire rotational speed information by software emulation, can calculate the coaxial tire pressure information that tyre pressure sensor is not installed; Read electric boosting steering system steering wheel angle information, filtering flase alarm information; Read mileage information, the state that the real time recording fault occurs, record diagnosis failure code.

2. compound type TPMS as claimed in claim 1 system, is characterized in that: comprise 2 described tyre pressure sensor modules, adopt the diagonal angle mounting means to be installed in two tires.

3. compound type TPMS as claimed in claim 1 system, it is characterized in that: described compound type tire pressure receiver module comprises:

Receiver Module is connected with the MCU module, is used for receiving the radio-frequency information that tyre pressure sensor sends;

The data communication module is connected with the MCU module, is used for gathering car load anti-lock braking system speed information, electric boosting steering system steering wheel angle information, instrument mileage information and the information that receives is sent to vehicle-mounted bus;

The MCU module, tyre pressure sensor is carried out receipt decoding by the signal that radio-frequency antenna sends out, obtain anti-lock brake tach signal and electric boosting steering system steering wheel angle signal from vehicle-mounted bus, through calculating, the entire vehicle tyre state is sent to the data communication module;

And power management module, it is Receiver Module, data communication module and MCU module for power supply.

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