CN103434347A - Automobile tire pressure monitoring system - Google Patents
Automobile tire pressure monitoring system Download PDFInfo
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- CN103434347A CN103434347A CN2013104238071A CN201310423807A CN103434347A CN 103434347 A CN103434347 A CN 103434347A CN 2013104238071 A CN2013104238071 A CN 2013104238071A CN 201310423807 A CN201310423807 A CN 201310423807A CN 103434347 A CN103434347 A CN 103434347A
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Abstract
The invention relates to an automobile tire pressure monitoring system. The automobile tire pressure monitoring system is characterized by comprising a tire module and a monitor module. The tire module comprises an MEMS (micro-electro mechanical system) sensor, a first micro control unit, a radio frequency antenna, a clock and regulator circuit and a first battery. The monitor module comprises a signal receiver, a second micro control unit, a peripheral interface, a display screen, a buzzer, a regulator circuit and a second battery. The radio frequency antenna in the tire module is connected with the signal receiver in the monitor module through a wireless signal. The automobile tire pressure monitoring system is capable of automatically monitoring the pressure and the temperature of tires in real time during the travelling of an automobile, giving an alarm of an abnormal situation in real time, and effectively reducing sudden traffic accidents caused by tire burst.
Description
Technical field
The present invention relates to a kind of safety early warning device, be can be arranged on the tire tube valve of automotive wheel tire pressure, temperature are carried out to real-time automatic monitoring specifically, and the abnormal condition that occur carried out to the automobile tire pressure monitoring system of Realtime Alerts.
Background technology
Along with the development of auto-industry, traffic is more and more convenient, and the traffic accident thereupon caused also is being on the increase, and has brought great threat to the mankind's life and property.Wherein, the accident ratio caused due to the air pressure of tire is very high, especially in the process of running at high speed of automobile, tire fault is that all drivers worry and the most difficult prevention the most, be also the major reason that sudden traffic accident occurs, this just makes people to be paid close attention to the tire pressure of the middle vehicle that travels.According to statistics, the traffic accident occurred on China Expressway has 70% to cause owing to blowing out, in this ratio of the U.S. up to 80%.How to prevent from blowing out and become an important topic of safe driving.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of automobile tire pressure monitoring system, this device can carry out real-time automatic monitoring to tire pressure, temperature in vehicle traveling process, and the abnormal condition that occur are carried out to Realtime Alerts, can effectively reduce the sudden traffic accident caused because blowing out.
For addressing the above problem, take following scheme:
The characteristics of automobile tire pressure monitoring system of the present invention are to comprise tire module and monitor module.Described tire module comprises MEMS sensor, the first micro-control unit, radio-frequency antenna, clock and adjuster circuit and the first battery; Between described MEMS sensor and the first micro-control unit, between MEMS sensor and the first battery, between the first micro-control unit and radio-frequency antenna, all be connected by wire between the first micro-control unit and clock and adjuster circuit.Described monitor module comprises signal receiver, the second micro-control unit, Peripheral Interface, read-out, buzzer phone, regulating circuit and the second battery; Described the second micro-control unit, the second battery all are connected with signal receiver by wire, and described Peripheral Interface, read-out, buzzer phone, regulating circuit all are connected by between wire and the second micro-control unit.Radio-frequency antenna in described tire module is connected by wireless signal with the signal receiver in monitor module.
Wherein: described MEMS sensor adopts the tire pressure monitoring sensor that model is MPXY8020A; Described the first micro-control unit adopts the microprocessor that the model of Micro-chip company is PIC16F636; Described radio-frequency antenna adopts the transmitting chip that the model of Maxim company is MAX1479; Described signal receiver is selected the receiving chip that the model of motorola inc is MC33594; Described the second micro-control unit adopts 48 pin MC68HC908GZ16 microprocessors of motorola inc.
Take such scheme, have the following advantages:
Because the tire module of automobile tire pressure monitoring system of the present invention comprises the MEMS sensor, the first micro-control unit, radio-frequency antenna etc., monitor module comprises signal receiver, the second micro-control unit etc., during use, tire module is arranged on the tire tube valve of motor tire, monitor module is placed in compartment, the MEMS sensor just can be by the pressure of the inside tires sensed, temperature data sends the first micro-control unit to, the first micro-control unit sends to the second micro-control unit by these data by radio-frequency antenna and signal receiver again, the second micro-control unit can be presented on read-out by the data that detect in real time, as data occur abnormal, can also carry out Realtime Alerts by buzzer phone.Like this, can carry out prevention of accident in advance and safeguard and process so that the occupant understands tire pressure, the temperature regime of vehicle at any time, reducing the generation of the sudden traffic accident caused because blowing out.
The accompanying drawing explanation
Fig. 1 is the structure principle chart of automobile tire pressure monitoring system of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Figure 1, automobile tire pressure monitoring system of the present invention comprises tire module and monitor module.
Described tire module comprises MEMS sensor (adopting microelectronics and the produced novel sensor of micromachining technology), the first micro-control unit, radio-frequency antenna, clock and adjuster circuit and the first battery.Between described MEMS sensor and the first micro-control unit, between MEMS sensor and the first battery, between the first micro-control unit and radio-frequency antenna, all be connected by wire between the first micro-control unit and clock and adjuster circuit.
Described monitor module comprises signal receiver, the second micro-control unit, Peripheral Interface, read-out, buzzer phone, regulating circuit and the second battery.Described the second micro-control unit, the second battery all are connected with signal receiver by wire, and described Peripheral Interface, read-out, buzzer phone, regulating circuit all are connected by between wire and the second micro-control unit.
Radio-frequency antenna in described tire module is connected by wireless signal with the signal receiver in monitor module.
Described MEMS sensor adopts the tire pressure monitoring sensor that model is MPXY8020A.It is comprised of a transfiguration pressure sensor component, temperature-sensing element and an interface circuit (having arousal function), and all these three elements are all in monolithic chip.MPXY8020A tire pressure monitoring sensor is encapsulated in super undersized encapsulation (SSOP), and SSOP is with the media protection filter.U.S. Freescale company is that tire pressure monitoring system (TPMS) provides a complete chipset, without other specific tire pressure monitoring receptor.Its principal feature has: (1) meets automotive grade temperature profile (40 ° of C to 125 ° of C); (2) there is the range of pressure of 637.5 kPa; (3) there is numeral (8) output of temperature and pressure sensor; (4) there is the Voltage-output (from 2.1V to 3.6V) in the power supply ratio; (5) the SSOP encapsulation can provide powerful media protection, and volume is small and exquisite; (6) three seconds arousal functions, realized the managing power consumption of module level; (7) low-power consumption.
MPXY8020A tire pressure monitoring sensor, by pin S1, S0 are put to different low and high levels, can produce different mode of operation.
1), S1=0, the S0=0(standy operation mode)
Under the stand-by operation mode, MPXY8020A inside is in minimum power consumption state, only for low frequency oscillator, Serial Peripheral Interface (SPI) (SPI), dac register (DAR), wake pulse and the power supply of reset pulse allotter circuit up.
2), S1=0, S0=1(pressure survey pattern)
Under the pressure survey pattern, the multiple way switch in device is connected to the sampling capacitance of MPXY8020A.After initialization, consider the stable of switch circuit, at least should after 500 μ s, could carry out the read data program.
3), S1=1, S0=0(temperature survey pattern)
Under the temperature survey pattern, the multiple way switch in device is connected to the sampling capacitance of MPXY8020A.Reading mode and pressure survey mode are basic identical.
4), S1=1, the S0=1(read data pattern)
Owing to there is no the immediate data output function in device, must complete by the first external micro-control unit the task of take off data output.Under the read data mode, the first micro-control unit initialization MPXY8020A is after gaging pressure, temperature mode of operation, utilize the SPI serial interface, by successively approaching program, the predictor serial is sent into to the inside DAC of MPXY8020A, detect the OUT output pin state of MPXY8020A, the Pressure/Temperature value of 8 that obtains approaching simultaneously.
Described the first micro-control unit adopts the microprocessor that the model of Micro-chip company is PIC16F636.Its principal feature has: (1) High Performance Reduced Instruction Set Computer (RISC) technology, only need to learn 35 instructions, and this gives the writing of program, debug, revise and bring great convenience, and is convenient to the simulating SPI by software serial ports and opens drain lead; (2) extremely low power consumption levels, under 1 MHz clock frequency, working current is about 100 μ A, and the exemplary operation electric current in the dormancy situation is only 1 nA; (3) working temperature range is wide, and the automotive grade range of temperatures is-40 ℃～125 ℃; (4) good confidentiality, peripheral hardware interconnect standard (PIC) is carried out protecting code with secret fuse, and the user is blow out fuse after burned code, other people again can't read, except non-recovery fuse (at present, PIC adopts the buried technique of fuse, and the possibility of recovering fuse is minimum); (5) carry WatchDog Timer, for system provides the function of Self-resetting under the harsh environment, improve the program reliability of operation.
Described radio-frequency antenna adopts the transmitting chip that the model of Maxim company is MAX1479.Its characteristics have: adopt quad flat non-pin (QFN) encapsulation of 16 pins of miniature 3 mm * 3 mm, 3 V operating voltages, automotive grade range of temperatures (40 ℃～125 ℃), open oscillator (200 μ s) fast, carry phaselocked loop (PLL) and high efficiency power amplifier, support the modulation system that amplitude shift keying (ASK), two scale notation on off keying (OOK) and frame move keying (FSK), super low-power consumption (under normal temperature, standby current is only 0.2 nA), have adjustable FSK skew and the output of programmable clock.
Described signal receiver is selected the receiving chip that the model of motorola inc is MC33594.It is a monolithic integrated RF receptor.Its characteristics have: adopt the LQFP24 encapsulation, wake fast (1 ms) up, include the if bandpas filter of 660kHz, complete voltage controlled oscillator (VCO) (VCO), can eliminate the frequency mixer of mirror image, the Manchester encoding decoding (FSK mode of operation) that automatic butt is received, Manchester encoding clock regeneration circuit, the SPI interface, can be used for designing the OOK/FSK acceptor circuit of 433.92 MHz.
Described the second micro-control unit adopts 48 pin MC68HC908GZ16 microprocessors of motorola inc.It is 8 8-digit microcontrollers of a employing 68HC08 framework of Freescale company, and resource is complete, and size is little, is applicable to the functional requirement of monitor module and the running environment of automobile.Its Main Resources comprises: 1 CAN module, 1 SPI module, 1 ESCI(enhancement mode serial communication interface) module, 2 binary channel 16 bit timing device interface modules, 10,8 tunnel A/D passage, 1 fundamental clock module, 37 universal input output pins, 8 bit keyboards wake port up.This controller adopts the PLL PHASE-LOCKED LOOP PLL TECHNIQUE, can produce the bus frequency of the highest 8MHz.
Principle of work of the present invention is as follows:
Tire module is arranged among the valve assembly of four tires of automobile, the round-the-clock air pressure to tire and temperature are monitored, and the situations such as the air pressure of each tire and temperature are gathered to the first micro-control unit by the MEMS sensor, the first micro-control unit is transmitted to the monitor module in operator's compartment by radio-frequency antenna after the Information Monitoring conversion is to Manchester encoding;
The signal receiver that is arranged on the monitor module in operator's compartment receives the information of sending from the radio-frequency antenna of each tire module, transfer to the second micro-control unit and decode after processing information directly is shown on read-out, or send buzzer warning to.
The existing safety measure of automobile, as ABS, EDS, EPS, safety air bag etc., are all " afterwards passive " type securities, after accident occurs, just can play the effect of protection personal safety.And native system belongs to " in advance initiatively " type security, when dangerous sign appears in tire and alarm, chaufeur can be taken measures, and accident is eliminated in bud.
Claims (6)
1. automobile tire pressure monitoring system, is characterized in that comprising tire module and monitor module;
Described tire module comprises MEMS sensor, the first micro-control unit, radio-frequency antenna, clock and adjuster circuit and the first battery; Between described MEMS sensor and the first micro-control unit, between MEMS sensor and the first battery, between the first micro-control unit and radio-frequency antenna, all be connected by wire between the first micro-control unit and clock and adjuster circuit;
Described monitor module comprises signal receiver, the second micro-control unit, Peripheral Interface, read-out, buzzer phone, regulating circuit and the second battery; Described the second micro-control unit, the second battery all are connected with signal receiver by wire, and described Peripheral Interface, read-out, buzzer phone, regulating circuit all are connected by between wire and the second micro-control unit;
Radio-frequency antenna in described tire module is connected by wireless signal with the signal receiver in monitor module.
2. automobile tire pressure monitoring system as claimed in claim 1, is characterized in that described MEMS sensor adopts the tire pressure monitoring sensor that model is MPXY8020A.
3. automobile tire pressure monitoring system as claimed in claim 1, is characterized in that described the first micro-control unit (MCU) adopts the microprocessor that the model of Micro-chip company is PIC16F636.
4. automobile tire pressure monitoring system as claimed in claim 1, is characterized in that described radio-frequency antenna adopts the transmitting chip that the model of Maxim company is MAX1479.
5. automobile tire pressure monitoring system as claimed in claim 1, is characterized in that described signal receiver selects the receiving chip that the model of motorola inc is MC33594.
6. automobile tire pressure monitoring system as claimed in claim 1, is characterized in that described the second micro-control unit adopts 48 pin MC68HC908GZ16 microprocessors of motorola inc.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013104238071A CN103434347A (en) | 2013-09-17 | 2013-09-17 | Automobile tire pressure monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013104238071A CN103434347A (en) | 2013-09-17 | 2013-09-17 | Automobile tire pressure monitoring system |
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| CN103434347A true CN103434347A (en) | 2013-12-11 |
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| CN2013104238071A Pending CN103434347A (en) | 2013-09-17 | 2013-09-17 | Automobile tire pressure monitoring system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104260601A (en) * | 2014-09-19 | 2015-01-07 | 苏州经贸职业技术学院 | Intelligent car tire pressure monitoring system |
| CN114379293A (en) * | 2022-03-01 | 2022-04-22 | 特拓(青岛)轮胎技术有限公司 | Intelligent tire monitoring system and method |
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| CN201034767Y (en) * | 2007-03-30 | 2008-03-12 | 山东豪迈机械科技有限公司 | Air pressure trigger switch and tire pressure monitoring system capable of detecting tyre burst |
| CN201350806Y (en) * | 2009-02-11 | 2009-11-25 | 哈尔滨威帝汽车电子有限公司 | Tire pressure monitoring system |
| CN201552987U (en) * | 2009-06-25 | 2010-08-18 | 浙江亚太机电股份有限公司 | Electrical control unit of system for monitoring automobile tire pressure and performing automatic braking in case of tire burst |
| CN201566429U (en) * | 2009-12-29 | 2010-09-01 | 南京汽车集团有限公司 | Tire pressure monitoring device based on centrifugal force switch |
| US20120176233A1 (en) * | 2007-10-26 | 2012-07-12 | Measurement Limited | Tire pressure monitoring system using wireless network |
| CN203528214U (en) * | 2013-09-17 | 2014-04-09 | 无锡中科苏惠自动化技术有限公司 | Device for monitoring tyre pressure of automobile |
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2013
- 2013-09-17 CN CN2013104238071A patent/CN103434347A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201034767Y (en) * | 2007-03-30 | 2008-03-12 | 山东豪迈机械科技有限公司 | Air pressure trigger switch and tire pressure monitoring system capable of detecting tyre burst |
| US20120176233A1 (en) * | 2007-10-26 | 2012-07-12 | Measurement Limited | Tire pressure monitoring system using wireless network |
| CN201350806Y (en) * | 2009-02-11 | 2009-11-25 | 哈尔滨威帝汽车电子有限公司 | Tire pressure monitoring system |
| CN201552987U (en) * | 2009-06-25 | 2010-08-18 | 浙江亚太机电股份有限公司 | Electrical control unit of system for monitoring automobile tire pressure and performing automatic braking in case of tire burst |
| CN201566429U (en) * | 2009-12-29 | 2010-09-01 | 南京汽车集团有限公司 | Tire pressure monitoring device based on centrifugal force switch |
| CN203528214U (en) * | 2013-09-17 | 2014-04-09 | 无锡中科苏惠自动化技术有限公司 | Device for monitoring tyre pressure of automobile |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104260601A (en) * | 2014-09-19 | 2015-01-07 | 苏州经贸职业技术学院 | Intelligent car tire pressure monitoring system |
| CN114379293A (en) * | 2022-03-01 | 2022-04-22 | 特拓(青岛)轮胎技术有限公司 | Intelligent tire monitoring system and method |
| CN114379293B (en) * | 2022-03-01 | 2023-11-24 | 特拓(青岛)轮胎技术有限公司 | Intelligent tire monitoring system and monitoring method |
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Application publication date: 20131211 |