CN104442231A - Motor vehicle tire pressure monitoring radiofrequency system - Google Patents
Motor vehicle tire pressure monitoring radiofrequency system Download PDFInfo
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- CN104442231A CN104442231A CN201310431596.6A CN201310431596A CN104442231A CN 104442231 A CN104442231 A CN 104442231A CN 201310431596 A CN201310431596 A CN 201310431596A CN 104442231 A CN104442231 A CN 104442231A
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Abstract
A motor vehicle tire pressure monitoring radiofrequency system comprises a tire module and a monitor module, the tire module comprises a first embedded microprocessor, and a sensor and a high frequency sending module which are connected with the first embedded microprocessor, and the monitor module comprises a second embedded microprocessor, and a display device, an input device and a high frequency reception module which are connected with the second embedded microprocessor. The motor vehicle tire pressure monitoring radiofrequency system has the advantages of low power consumption, high reliability, good stability and low cost, and realizes the safety early warning purpose.
Description
Technical field
The invention belongs to vehicle electric field, relate to a kind of motor vehicle tyre pressure monitoring radio frequency system.
Background technology
Along with self-propelled vehicle enters family more and more, the safety problem of motor-driven vehicle going also becomes the topic that people more and more pay close attention to.Motor vehicle tyre pressure monitoring system (TPMS) is arisen at the historic moment thus, it is the 3rd important automobile safety electronic product after ABS, safety air bag, be mainly used in carrying out real-time automatic monitoring to tyre pressure, temperature in motor-driven vehicle going process, and Realtime Alerts is carried out to the abnormal condition occurred, be that the life security of motorist and the personnel of riding ensures forewarn system.
The way of realization of current TPMS mainly contains two kinds: based on the TPMS (Wheel-Speed Based TPMS) of vehicle wheel rotational speed, cry again " indirect type TPMS "; Based on the TPMS (Pressure-SensorBased TPMS) of pressure sensor, be direct-type TPMS again ".
Indirect type TPMS compares rotating speed difference between wheel by the wheel speed sensors of self-propelled vehicle ABS system, and determine the change of tire pressure, this mode is used seldom now.Direct-type TPMS uses pressure sensor and temperature sensor in each tire, then the master controller that the pressure and temperature signal collected is sent to motor vehicle driving indoor by wired or wireless mode is processed, current most of TPMS adopts wireless mode to carry out the transmission of pressure and temperature data.Present direct-type TPMS uses more extensive.In this fashion, tire pneumatic tyre module is once load onto, and battery just constantly works, and tire module dissipation is higher, during wheel high speed rotating radio frequency reception sensitivity and noise suppression performance all poor.
Summary of the invention
Higher for solving tire module dissipation in prior art, during wheel high speed rotating, radio frequency reception sensitivity and all poor technological deficiency of noise suppression performance, the invention provides a kind of motor vehicle tyre pressure monitoring radio frequency system.
Motor vehicle tyre pressure monitoring radio frequency system, comprise tire module and monitor module, sensor, high frequency sending module that described tire module comprises the first embedded microprocessor and is connected with the first embedded microprocessor, display equipment, input equipment and high-frequency reception module that described monitor module comprises the second embedded microprocessor and is connected with the second embedded microprocessor.
Preferably, described sensor is MPXY8020A.
Preferably, described first embedded microprocessor is PIC16F636.
Preferably, described high frequency sending module is MAX1479.
Preferably, described high-frequency reception module is MC33594.
Preferably, described second embedded microprocessor is MC68HC908GZ16.
Motor vehicle tyre pressure of the present invention monitoring radio frequency system, low in energy consumption, reliability is high, good stability, cost are low, can meet the object of safe early warning.
Accompanying drawing explanation
Fig. 1 illustrates the present invention's detailed description of the invention schematic diagram.
Detailed description of the invention
Below provide the present invention's detailed description of the invention.
Motor vehicle tyre pressure monitoring radio frequency system, comprise tire module and monitor module, sensor, high frequency sending module that described tire module comprises the first embedded microprocessor and is connected with the first embedded microprocessor, display equipment, input equipment and high-frequency reception module that described monitor module comprises the second embedded microprocessor and is connected with the second embedded microprocessor.
As Fig. 1 provides the present invention's detailed description of the invention: tire module is made up of sensor, the first embedded microprocessor, high-frequency emission module.
Sensor preferably selects the pressure/temperature sensor MPXY8020A of motorola inc.It is a kind of surface micro type capacitive mems (MSMS) pressure sensor.Its feature has: special TPMS air pressure and temperature sensor, CMOS technology, low-power consumption, 3 V operating voltages, export with the integrated low frequency oscillator of MCU arousal function, 8 bit digital; Repertoire is integrated on one chip, reduces power consumption, is applicable to the battery power supply system of conditional request harshness; Temperature-measuring range is one 40 DEG C ~+125 DEG C, and pressure measurement scope is 0 ~ 637 kPa; It has 4 kinds of mode of operations, i.e. standby/reset, pressure survey, temperature survey and data export.User can select corresponding pattern by arranging S0 and S1 pin, as listed in table 1.Can be found by table 1, MPXY8020A is under different mode of operations, and the pull up circuit of needs is different, thus reaches the object reducing power consumption.
The PIC16F636 of the first preferred Micro-chip company of embedded microprocessor.It has extremely low power consumption levels.Under 1 MHz clock frequency, working current is about 100 μ A, and the exemplary operation electric current in dormancy situation is only 1 nA.And working temperature range is wide.Self-propelled vehicle level range of temperatures is one 40 DEG C ~ 125 DEG C.Also there is confidentiality thoroughly.PIC carrys out protecting code with secret fuse, and user is blow out fuse after burned code, and other people again cannot read, except non-recovery fuse.At present, PIC adopts the buried technique of fuse, and the possibility recovering fuse is minimum.Carry WatchDog Timer simultaneously.For system provides the function of Self-resetting under harsh environment, improve program reliability of operation.
High-frequency emission module is the MAX1479 of preferred Maxim company.Its feature has: adopt the 16 pin QFN of miniature 3 mm × 3 mm to encapsulate, 3 V operating voltages, self-propelled vehicle level range of temperatures (one 40 DEG C ~ 10 DEG C), open oscillator (200 μ s) fast, carry phase-locked loop pll and high efficiency power amplifier, support ASK, OOK and FSK modulation mode, super low-power consumption (under normal temperature, standby current is only 0.2 nA), adjustable FSK skew, programmable clock exports.
Monitor module is primarily of high-frequency reception module, the second embedded microprocessor, display equipment-LCD display and input equipment-button composition.
High-frequency reception module preferably selects the MC33594 (Remeo2) of motorola inc, and it is a single-chip integration radio frequency receiver.Its feature has: adopt LQFP24 encapsulation, fast wake-up (1 ms), include the if bandpas filter of 660kHz, complete voltage controlled oscillator (VCO) (VCO), the frequency mixer of mirror image can be eliminated, Manchester encoding decoding (FSK mode of operation) that automatic butt receives, Manchester encoding clock regeneration circuit, SPI interface, can be used for the OOK/FSK acceptor circuit of design 433.92 MHz.
The 48 pin MC68HC908GZ16 (being called for short " GZ16 ") of the second embedded microprocessor prioritizing selection motorola inc of monitor module.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 self-propelled vehicle.Its Main Resources comprises: 1 CAN module, 1 SPI module, 1 ESCI 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 PLL PHASE-LOCKED LOOP PLL TECHNIQUE, can produce the bus frequency of the highest 8MHz.
LCD display selects the dot matrix lcd LG192641 of Samsung.It has following features: 192 × 64 dot matrix, large (oad 113.0 mm × 71.0 mm × 9.5 mm of visible area scope, visible area is 97.0 mm × 48.0 mm), built-in LCD Controlling actuator, single 5 V power/and dual power supply is optional, working temperature range wide (-20 DEG C ~+70 DEG C), adopts LED-backlit and EL backlight is optional, and under high light, display effect is good.
Above-describedly be only the preferred embodiments of the present invention; described embodiment is also not used to limit scope of patent protection of the present invention; therefore the equivalent structure that every utilization specification sheets of the present invention and accompanying drawing content are done changes, and in like manner all should be included in protection scope of the present invention.
Claims (6)
1. motor vehicle tyre pressure monitoring radio frequency system, comprise tire module and monitor module, it is characterized in that, sensor, high frequency sending module that described tire module comprises the first embedded microprocessor and is connected with the first embedded microprocessor, display equipment, input equipment and high-frequency reception module that described monitor module comprises the second embedded microprocessor and is connected with the second embedded microprocessor.
2. motor vehicle tyre pressure monitors a radio frequency system as claimed in claim 1, and it is characterized in that, described sensor is MPXY8020A.
3. motor vehicle tyre pressure monitors a radio frequency system as claimed in claim 1, and it is characterized in that, described first embedded microprocessor is PIC16F636.
4. motor vehicle tyre pressure monitors a radio frequency system as claimed in claim 1, and it is characterized in that, described high frequency sending module is MAX1479.
5. motor vehicle tyre pressure monitors a radio frequency system as claimed in claim 1, and it is characterized in that, described high-frequency reception module is MC33594.
6. motor vehicle tyre pressure monitors a radio frequency system as claimed in claim 1, and it is characterized in that, described second embedded microprocessor is MC68HC908GZ16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310431596.6A CN104442231A (en) | 2013-09-22 | 2013-09-22 | Motor vehicle tire pressure monitoring radiofrequency system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310431596.6A CN104442231A (en) | 2013-09-22 | 2013-09-22 | Motor vehicle tire pressure monitoring radiofrequency system |
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| Publication Number | Publication Date |
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| CN104442231A true CN104442231A (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310431596.6A Pending CN104442231A (en) | 2013-09-22 | 2013-09-22 | Motor vehicle tire pressure monitoring radiofrequency system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104786759A (en) * | 2015-04-11 | 2015-07-22 | 成都陵川特种工业有限责任公司 | Automobile tire pressure monitoring system |
| CN108099512A (en) * | 2017-12-25 | 2018-06-01 | 苏州赛源微电子有限公司 | A kind of monitoring tire pressure integrated system |
-
2013
- 2013-09-22 CN CN201310431596.6A patent/CN104442231A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104786759A (en) * | 2015-04-11 | 2015-07-22 | 成都陵川特种工业有限责任公司 | Automobile tire pressure monitoring system |
| CN108099512A (en) * | 2017-12-25 | 2018-06-01 | 苏州赛源微电子有限公司 | A kind of monitoring tire pressure integrated system |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150325 |