CN201009689Y - Monitoring device for vehicle tyre pressure - Google Patents
Monitoring device for vehicle tyre pressure Download PDFInfo
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- CN201009689Y CN201009689Y CNU2006201652287U CN200620165228U CN201009689Y CN 201009689 Y CN201009689 Y CN 201009689Y CN U2006201652287 U CNU2006201652287 U CN U2006201652287U CN 200620165228 U CN200620165228 U CN 200620165228U CN 201009689 Y CN201009689 Y CN 201009689Y
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Abstract
The utility model discloses a pressure monitoring device for a vehicle tire, comprising a pressure sensor, an atmospheric pressure sensor, a transmitter, a receiver, a processor and a display apparatus. The transmitter arranged in the vehicle tire is connected with the sensor, and transmits the data detected by the sensor. The receiver arranged in the carriage receives and demodulates the data, and transmits the data to the processor. The processor is connected with the atmospheric pressure sensor. The processor compares and processes the atmospheric pressure data and the received data from the inside of the vehicle tire, and the processed result is displayed and alarmed trough the display apparatus. The utility model transmits the data of the pressure and temperature in the tire to the receive displayer through a radio, and compares the data with the atmospheric pressure to confirm the safe range of the tire pressure, then gives notice to the driver in time, which can avoid the tire-induced accidents. The utility model is adapted to all driving condition, particularly to the plateau.
Description
One, technical field
The invention belongs to the vehicle electronics security fields.Specifically a kind of vehicle tyre pressure monitoring device that under different bar pressures, all is suitable for.
Two, background technology
Along with socioeconomic continuous development, automobile has obtained using widely as the vehicle, and running safety can be subjected to generally paying attention to owing to closely related with people's life.Vehicle tyre more and more receives everybody concern as a key factor of ride safety of automobile.
Existing tyre pressure monitoring device comprises pressure sensor, transmitter, receptor and treater.It is by installing sensing transmitter in motor tire, air pressure in the tire and temperature parameter are delivered to the reception telltale with the mode of wireless transmission, in time driver can according to circumstances be taken measures chaufeur, avoids because the problem of tire causes accident.The signal data that can receive simultaneously Reverse Sensor shows behind the car that state and prompting report to the police.
Wherein, sensor: MPXY80x0 is also referred to as Daytona.It is capacitive character Mechatronic Systems (MEMS) pressure sensor of surface through micromachined.Daytona comprises pressure frequency converter, positive temperature coefficient integrated resistor temperature sensor and produces the required whole circuits of pressure and temperature 8 bit digital output of calibration that all application all provide on a punch die.
Transmitter 68HC908RF2 is also referred to as RF2, is made up of two chips.One is 2KB flash memory HC08 MCU (identical with the MC68HC908RK2 parts number); Another is the RF transmitter, can be in the active distance of hundreds of rice transmission of digital data (identical with the MC33493 parts number, as to be also referred to as Tango3).
Antenna adopts the PCB antenna.
The RF receptor: MC33594 is also referred to as Romeo2, is the receptor of compatible RF2.Romeo2 can receive and demodulation Manchester coded data, and can go up the output notebook data in common serial peripheral interface (SPI).
MCU:MC68HC908KX8 is also referred to as KX8, and this MCU is that this demonstration is selected at random.Freescale provides the MCU that is applicable to automobile in a large number option.
Studies show that the major cause of blowing out at the highlands running car is the variation of bar pressure, cause the air pressure of tire too high or too low.Because the air pressure itself in the tire does not change, too high the forcing in the tire of bar pressure contracted, and is the deficency state; Bar pressure is crossed when hanging down, and causes tire inflation, is the hypertonia state.This two states all is the state that the tire pressure temperature monitoring system need be reported to the police; But, cause existing tire pressure device for detecting temperature can not report to the police because the air pressure itself in the tire does not change.
All bar pressure is not taken into account at the product of whole world all tire pressure and temp monitoring system at present, thereby just can not be with data and the bar pressure contrast that measures.The shortcoming of prior art is: under the situation that has taken place to change at bar pressures such as plateaus, can not play the monitoring automotive tire pressure, make its effect that is operated in optimum regime, cause the normal illusion of tire pressure to navigating mate on the contrary, become potential safety hazard.
Three, summary of the invention
The purpose of this utility model is to provide a kind of vehicle tyre pressure monitoring device, this device is delivered to the air pressure in the tire and the temperature parameter mode with wireless transmission in the treater, treater is handled the back demonstration with the data and the bar pressure contrast that receive, timely driver, chaufeur can according to circumstances be taken measures, avoid owing to bar pressure changes the accident of blowing out that causes.
The purpose of this utility model is achieved through the following technical solutions:
A kind of vehicle tyre pressure monitoring device comprises pressure sensor, transmitter, receptor, treater and read out instrument, and pressure sensor and transmitter all are arranged in the vehicle tyre; Receptor, treater and read out instrument all are arranged in the vehicle railway carriage; Transmitter is connected with sensor and the data that sensor records is launched; Receptor reception and demodulating data and to the treater output data; It is characterized in that: in the vehicle railway carriage, be provided with and treater bonded assembly atmospheric-pressure sensor, treater compares the bar pressure data that the data in the vehicle tyre that receives and atmospheric-pressure sensor send and handle, and result shown by read out instrument and reports to the police.
In the utility model, transmitter is MC68HC908RF2, and receptor is MC33594, i.e. Remeo2.Be installed in the data that the pressure sensor MPXY8020A5 on each wheel of vehicle records and feed back to transmitter MC68HC908RF2 (STC89C58RD+).Receptor and treater generally are installed near the instrument carrier panel.
In the utility model, described pressure sensor Daytona is a kind of surface micro type capacitive mems single-chip pressure sensor, comprise that pressure intensifier, positive temperature coefficient diffusion resistance temperature sensor and all must circuit, in order to produce the 8bit temperature and pressure numeral output of a calibration.
Pressure sensor Daytona characteristics: be exclusively used in the TPMS temperature and pressure and measure; Monolithic MEMS micromechanics pressure sensitive unit; The 3V operating voltage; Low-power consumption, standby current 600nA; Force samples electric current 1.5mA; Temperature sampling electric current 500uA; 4 kinds of mode of operations are applied in a flexible way in the hope of economize on electricity; Built-in low frequency oscillator can be used for waking up central process unit (MCU); The output of 8 bit data; The SSOP encapsulation; Media protection; The MC68HC908RF2 interface of optimizing links.
Transmitter (MCU+RF also claims RF2) is made up of two chips.First is 2KB quickflashing HC08 MCU; The 2nd is the RF projector, can reach hundreds of rice by transmission of digital in clearance envelope.RF2 is High Performance, low-power consumption, 32 pins, LQFP surface mounting component, have that the special-purpose Flash data byte of HC08 kernel, 2K Flash memory device, 256 bytes is deposited, 128 byte RAM, 17 bit addressings, 16 position index registers and stack pointer, 8 universaling I/O ports, 6 have the input of keyboard interrupt function, 2 LED outputs; In addition, it is also integrated Tango3, low-power consumption PLL phaselocked loop radio-frequency (RF) transmitter, the modulation that can finish digital signal send, and support FSK and the ASK modulation system of 315/434/868MHz, have that control sends and the function of horsepower output.Radio-frequency (RF) transmitter Tango3, be that MC33493 supports the 315/433MH carrier wave, OOK and FSK modulation system, low standby current (0.1nA), horsepower output is adjustable (reaching 5dBM), the maximum 11Kbps of data transmission rate, integrated PLL phaselocked loop and VCO voltage-frequency oscillator, external component are few etc.
Emitting antenna adopts helical antenna, cooperates the peripheral components suitable parameters to reach the maximized purpose of output.When the car actual measurement, the not packet loss of running at high speed.Can satisfy the actual use of product.
Power unit adopts the mode of power filter, and filtering is because the low voltage emission Problem of Failure that voltage fluctuation produces, and has prolonged battery service life.The requirement in service life of satisfying product more than 5 years.
Receptor adopts radio frequency receiver Remeo2.Remeo2 is MC33594, and compatible RF2 receives and demodulation Manchester coded data, passes through the general-duty spi bus to the treater output data.Support the 315/433MH carrier wave; OOK and FSK modulation system; Low-power consumption, standby current 10nA; The data management system support is explained by oneself or voice are loyal surveys; The clock recovery function is supported the Manchester code signal; Can be by the spi bus setting; Only need peripheral components seldom.
Atmospheric-pressure sensor adopts SCP1000, and data are exported to receiving processor.
Receiving processor (STC89C58RD+) has 32KFLASH, can satisfy Chinese character and show and multi-functional requirement to the program space.Treater is handled data and result is shown, LCD display adopts the 128X64 dot matrix, satisfies Chinese character and shows (pressure and temperature that shows 4 tires simultaneously) and multi-functional requirement to read-out.After the pressure and temperature data of tire exceed predefined barrier line, promptly report to the police.
Communications protocol of the present utility model and data format.
The mode of the utility model The data Manchester coding, FSK modulation sends.Data transmission rate is 9600bps.The electric frequency of Manchester coding utilization height changes to low electric frequency and represents 0, hangs down the electric electric frequency of height that frequently changes to and represents 1.During the FSK modulation, utilize two different frequencies to represent digital height or digital low signal.In the utility model, use lower frequency representation 1, higher frequency representation 0.The data management system of Remeo2 receptor has been arranged to such modulation and demodulation mode.When tire module is arranged to send data, it wake up earlier receptor, then send Frame, arrive sleep state at last.A complete Frame is made of following several parts: (a), preamble synchronization position (Preamble), 16bit altogether is made as the FB86 of 16 systems usually.Preceding 4 (1111) are that Remeo2 is essential, are used for waking up receptor and will set up internal circuit.Ensuing 8bit (B8) is the Configuration Values among the configuration register CR2 among the Remeo2, and purpose is to be used for the log-on data manager.Remaining 4 bit positions (0110) are used for activating the work of Remeo2, show the beginning of valid data, with ID number beginning of device.(b), the valid data that follow bit preamble (Preamble) closely are ID numbers of device, 32bit is used for distinguishing different projectors altogether.(c) pressure and temperature signal respectively accounts for 8bit.(d), status signal, account for 8bit.(e), the stop bit of the verification of 8bit nuclear and 2bit.Whole complete Frame comprises 82 data bit altogether.Wherein, 8 status signal has only used 3 in reference scheme, and remaining keeps when giving product design uses.Verification is endorsed and is helped to reduce the interference that is caused by other factors, guarantees that the complete sum of data is correct.Two stop bit notice receptors transmit data and finish.
Principle of work of the present utility model is as follows:
Pressure sensor in the tire is waken up per 3 seconds; Gaging pressure: maximum/minimum value is deposited among the RAM,, increase counting machine, return STOP if do not change; Through average 7 countings, after about 20 seconds, data are reached receiver module; If bigger variation is arranged, then enter quick sending mode, continuous gauging also sends 10 times.
Projector RF2 sequential sends and requires as shown in Figure 4.The left side is the state machine of transmitter, and 4 states are arranged: state 1 is a readiness for action, and the electric current that this moment, circuit was asked for from power supply is very little; When enable signal is 1, get the hang of the phase-locked phase of 2-PLL phaselocked loop, data clock begins to set up, and sees Fig. 4 right side; Through after certain setting time, the 3-PLL phaselocked loop that gets the hang of pins the phase, if time T is pinned the needed time less than phaselocked loop, will rest on state 2 (lock is to the ring lock phase phase) so; Next 4 sending modes that get the hang of, data are sent into pin data, and send after modulation.Be lower than specified value in case power line voltage takes place, enter the circuit off-mode, only on the enable enable signal, send a low level, just can wake it up.
Behind the receptor electrification reset, initialization STC89C58RD+, configuration Remeo2, and checking; Configuration failure is lighted the LED lamp, successful change, and flicker LED lamp is waited for the Frame on the SPI interface and the data of atmospheric-pressure sensor afterwards; After receiving, judge verification nuclear, correct then requirement according to the rules is handled, and controls the demonstration of LED lamp simultaneously, realizes that by peripheral circuit reception, processing, warning, Chinese character show, the function of Reverse Sensor display alarm then.
In the utility model, read out instrument can adopt equipment such as LCD display, LCDs, loud speaker.Wherein the mode of single-wire communication is adopted in the realization of Reverse Sensor display alarm function, reads the data of Reverse Sensor when reversing, through processes and displays and warning.
The utility model is car production producer a large amount of typing tire sensing transmitter numbering for convenience, and other is furnished with radio-frequency card and card reader.By with the communication of receptor, realize automatic tire sensing transmitter numbering input function.
Be provided with atmospheric-pressure sensor in the utility model, it is by installing sensing transmitter in motor tire, air pressure in the tire and temperature parameter are delivered to treater with the mode of wireless transmission, treater with the data that receive by with the contrast of bar pressure, determine the safe range of tire pressure, and timely driver, chaufeur can according to circumstances be taken measures, avoid because the problem of tire causes accident.
The beneficial effects of the utility model are: under the bigger situation of pressure variation, the inflation pressure safe range of tire is redefined, be operated in optimum regime to guarantee motor tire, thereby effectively avoid the generation of the accident of blowing out.The utility model is applicable to various environment, is particularly suitable for using when the up train of plateau.
Four, description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is that pressure sensor and transmitter are arranged on the site plan in the vehicle tyre;
Fig. 3 is the circuit diagram of pressure sensor and transmitter in the utility model;
Fig. 4 is the circuit diagram of receptor and treater in the utility model.
Five, the specific embodiment
A kind of vehicle tyre pressure monitoring device described in the utility model comprises pressure sensor 1, transmitter 2, receptor 3, treater 4 and read out instrument 5, and pressure sensor 1 and transmitter 2 all are arranged in the vehicle tyre 7; Receptor 3, treater 4 and read out instrument 5 all are arranged in the vehicle railway carriage 6, and are installed in the gauge panel side.Transmitter 2 is connected with pressure sensor 1 and the data that pressure sensor 1 records is launched; Receptor 3 receptions and demodulating data and to treater 4 output datas; In vehicle railway carriage 6, be provided with and treater 4 bonded assembly atmospheric-pressure sensor 8, treater 4 compares the bar pressure data that the data in the vehicle tyre that receives 6 and atmospheric-pressure sensor 8 send and handle, and result shown by read out instrument 5 and reports to the police.
Treater 4 has 32KFLASH, can satisfy Chinese character and show and multi-functional requirement to the program space.Treater is handled data and result is shown that LCD display adopts the 128X64 dot matrix, satisfies Chinese character and shows (pressure and temperature that shows 4 tires simultaneously, bogie then multi-screen polyembryony show simultaneously) and multi-functional requirement to read-out.Treater 4 compares the bar pressure data that the data in the vehicle tyre that receives 6 and atmospheric-pressure sensor 8 send and handle, and after the pressure and temperature data of tire exceed predefined barrier line, promptly reports to the police.The signal data that can receive simultaneously Reverse Sensor shows behind the car that state and prompting report to the police.
The utility model is delivered to the reception telltale with the air pressure in the tire and temperature parameter with the mode of wireless transmission, considers the variation of bar pressure simultaneously.Even the air pressure in the tire does not change, when bar pressure changed, also timely driver can according to circumstances be taken measures chaufeur, avoids causing accident owing to the problem of tire.
Claims (5)
1. a vehicle tyre pressure monitoring device comprises pressure sensor (1), transmitter (2), receptor (3), treater (4) and read out instrument (5), and pressure sensor (1) and transmitter (2) all are arranged in the vehicle tyre (7); Receptor (3), treater (4) and read out instrument (5) all are arranged in the vehicle railway carriage (6); Transmitter (2) is connected with sensor (1) and the data that sensor (1) records is launched; Receptor (3) reception and demodulating data and to treater (4) output data; It is characterized in that: in vehicle railway carriage (6), be provided with and treater (4) bonded assembly atmospheric-pressure sensor (8), treater (4) compares the bar pressure data that the data in the vehicle tyre (7) that receives and atmospheric-pressure sensor (8) send and handle, and result shown by read out instrument (5) and reports to the police.
2. vehicle tyre pressure monitoring device according to claim 1 is characterized in that: described pressure sensor (1), transmitter (2) are measured emission to the temperature and pressure of vehicle tyre (7).
3. vehicle tyre pressure monitoring device according to claim 1 is characterized in that: described read out instrument (5) is a LCD display, and employing can be satisfied the 128X64 dot matrix of Chinese character demonstration and multi-functional requirement; Contain sound and light alarm and audio alert.
4. vehicle tyre pressure monitoring device according to claim 1 is characterized in that: described receptor (3) is provided with the Reverse Sensor displaying alarm, reads the data of Reverse Sensor when reversing, through processes and displays and warning.
5. vehicle tyre pressure monitoring device according to claim 1 is characterized in that: the mode that atmospheric-pressure sensor (8) transmits the bar pressure data is bus type or parasitic formula.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201652287U CN201009689Y (en) | 2006-12-21 | 2006-12-21 | Monitoring device for vehicle tyre pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201652287U CN201009689Y (en) | 2006-12-21 | 2006-12-21 | Monitoring device for vehicle tyre pressure |
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| Publication Number | Publication Date |
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| CN201009689Y true CN201009689Y (en) | 2008-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2006201652287U Expired - Fee Related CN201009689Y (en) | 2006-12-21 | 2006-12-21 | Monitoring device for vehicle tyre pressure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103115736A (en) * | 2013-02-05 | 2013-05-22 | 广州市华南橡胶轮胎有限公司 | Tire air tightness performance detecting device and detecting method |
| CN104343586A (en) * | 2013-07-25 | 2015-02-11 | 福特环球技术公司 | Barometric pressure inference based on tire pressure |
| CN107302361A (en) * | 2014-03-06 | 2017-10-27 | 深圳市道通科技股份有限公司 | General TPMS data encoding formaies conversion method and device |
| CN107539041A (en) * | 2016-06-29 | 2018-01-05 | 长城汽车股份有限公司 | The data transmission method and system of tyre pressure sensor |
| CN109532352A (en) * | 2018-12-13 | 2019-03-29 | 广州小鹏汽车科技有限公司 | Tire pressure detection method, device, vehicle and storage medium |
| TWI665106B (en) * | 2017-09-05 | 2019-07-11 | 大陸商矽力杰半導體技術（杭州）有限公司 | Code writing device, tire pressure monitoring unit and control method |
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2006
- 2006-12-21 CN CNU2006201652287U patent/CN201009689Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103115736A (en) * | 2013-02-05 | 2013-05-22 | 广州市华南橡胶轮胎有限公司 | Tire air tightness performance detecting device and detecting method |
| CN103115736B (en) * | 2013-02-05 | 2015-12-09 | 广州丰力橡胶轮胎有限公司 | Tyre air tightness energy pick-up unit and detection method |
| CN104343586A (en) * | 2013-07-25 | 2015-02-11 | 福特环球技术公司 | Barometric pressure inference based on tire pressure |
| CN104343586B (en) * | 2013-07-25 | 2018-11-13 | 福特环球技术公司 | Atmospheric pressure based on tire pressure is inferred |
| CN107302361A (en) * | 2014-03-06 | 2017-10-27 | 深圳市道通科技股份有限公司 | General TPMS data encoding formaies conversion method and device |
| CN107539041A (en) * | 2016-06-29 | 2018-01-05 | 长城汽车股份有限公司 | The data transmission method and system of tyre pressure sensor |
| TWI665106B (en) * | 2017-09-05 | 2019-07-11 | 大陸商矽力杰半導體技術（杭州）有限公司 | Code writing device, tire pressure monitoring unit and control method |
| CN109532352A (en) * | 2018-12-13 | 2019-03-29 | 广州小鹏汽车科技有限公司 | Tire pressure detection method, device, vehicle and storage medium |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |