CN202491645U - ABS(anti-lock brake system)-based tire pressure monitoring system - Google Patents
ABS(anti-lock brake system)-based tire pressure monitoring system Download PDFInfo
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- CN202491645U CN202491645U CN2012200840617U CN201220084061U CN202491645U CN 202491645 U CN202491645 U CN 202491645U CN 2012200840617 U CN2012200840617 U CN 2012200840617U CN 201220084061 U CN201220084061 U CN 201220084061U CN 202491645 U CN202491645 U CN 202491645U
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Abstract
The utility model discloses an ABS (anti-lock brake system)-based tire pressure monitoring system. The ABS-based tire pressure monitoring system comprises a TPMS (tire pressure monitor system) sensor unit and a wheel speed sensor, wherein the TPMS sensor unit is used for detecting pressure and temperature in tires and is connected with a radio frequency transmitter; the wheel speed sensor is used for detecting the rotation speed of the wheels and is connected with an ABS system through a data line; and the ABS system is also connected with a radio frequency receiver which is used for receiving detection data from the TPMS sensor unit. According to the ABS-based tire pressure monitoring system, the ABS system and the TPMS system are organically combined together, data of pressure in the tires are acquired in various manners, the problem that high-frequency wireless communication is easy to hinder and interfere is effectively solved, and the reliability of the whole monitoring system is improved. In addition, the tire pressure monitoring system is based on the combination of the ABS and the TPMS, the conventional automobiles with the ABS system can be conveniently upgraded, and the application range is wide.
Description
Technical field
The utility model relates to the tire inflation pressure determining system of automobile, especially a kind of system for monitoring pressure in tyre based on ABS.
Background technology
System for monitoring pressure in tyre (Tire Pressure Monitor System; TPMS); Its effect is in vehicle traveling process, tire pressure and temperature to be carried out real-time automatic monitoring, and tire flat and infrabar, high-temperature are reported to the police, to guarantee traffic safety.
Vehicle tire pressure pressure monitor system (TPMS) is significant in the effect aspect the reduction traffic accident incidence; According to American I ndiana University; Research in 1977, the U.S. has 260,000 traffic accidents to be because the tire pressure deficiency causes every year, accounts for 1.4% of traffic accident.
According to the report of Goodyear research center, on wet and slippery road surface, the tire braking distance that air pressure is sufficient significantly reduces.The reason that analysis reduces is that tire and ground-surface water cushion effect obviously reduce because the tire and the contact area of ground of air pressure abundance are little.And on the road surface of drying, although soft tire and contact area of ground are bigger, the pressure that bears on the unit area is proportional to be reduced, and both offset, and can not reduce braking distance.
Estimate according to NHTSA, as adopt 4 to take turns pressure monitoring, 20% low pressure threshold can prevent 10635 injury accidents, reduces by 79 death.
China has become global the third-largest automotive market, and the preceding two big Japan and the U.S. have all carried out the policy of forcing to install TPMS, and why government does not put into effect relevant policies, and chief reason also is to consider the ability to bear of customer and producer.Though system for monitoring pressure in tyre also has multiplely in the market, be to small passenger car basically, and generally all be applicable on the small passenger car of configuration vacuum tyre, and almost be blank for the tire pressure monitoring system of commercial vehicle/comm..vehicle.
Existing system for monitoring pressure in tyre mainly is divided into two types:
A kind of is indirect type (Wheel-Speed Based TPMS, be called for short WSB) system, and this system is that the wheel speed sensors through automobile ABS system comes the rotating speed difference between the comparative tire, to reach the purpose of monitoring tire pressure.ABS confirms whether locking of wheel through wheel speed sensors, thereby whether decision starts antiblock device.When tire pressure reduced, the weight of vehicle can make diameter of tyres diminish, and this will cause the speed of a motor vehicle to change, and this variation promptly can be used for triggering warning system and comes to give a warning to the driver.Belong to passive-type afterwards.Its shortcoming is: 1, this system can not report to the police when surpassing two tire flats; 2, this system is unsuitable runs at high speed, and speed surpasses 95 kilometers/hour systems and just can't monitor; Do not store data function when 3, cutting off the power supply, and need the professional to carry out reset operation, trouble resets; 4, can not point out the tire fault position, the writing function that goes of not reporting to the police.
Another kind is direct-type (Pressure-Sensor Based TPMS; Be called for short PSB) system: require working pressure sensor in each tire; And installation wireless launcher; Be used for pressure information is sent to the system on the central receiver module from inside tires, then each tire pressure data shown.In too low or when gas leakage when tire pressure, system can auto alarm.Belong to initiatively defensive in advance.Its shortcoming is: 1, warning poor accuracy, and the pressure variation of tire is bigger under friction speed, load and temperature conditions, thereby causes the air pressure alarm critical value to be difficult for setting, and has the problem of easy flase alarm; 2, adopt wireless transmission and receive mode to realize that signal transmits, receive the shielding of wheel steel hub and the interference in magnetic field easily, influence stability, the reliability of signal.
The shortcoming of above-mentioned two kinds of system for monitoring pressure in tyre shows more obviously on being applied to commercial vehicle/comm..vehicle the time.In fact; In Chinese national economy also is not very flourishing current this period; Our commercial vehicle/comm..vehicle occupies very big market recoverable amount, and along with development and national economy, the use of commercial vehicle/comm..vehicle can get more and more; The fault that blowing out appears in commercial vehicle/comm..vehicle also can get more and more, and the reason that occurs blowing out is broadly divided into: the too high pressure of tire that causes of the temperature of (1) tire raises.(2) variation of bar pressure causes that tire pressure is too high.(3) phenomenons such as gas leakage take place in tire itself.At this moment just press for a kind of system for monitoring pressure in tyre that is applicable to commercial vehicle/comm..vehicle on the market, ensure ride safety of automobile through technical innovation.
The utility model content
The technical matters that the utility model will solve is: a kind of automobile tire pressure monitoring system based on ABS is provided, and this monitoring system is integrated ABS system and TPMS system have ensured the reliability and stability of monitoring tire pressure data through the two combination.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopted is:
A kind of system for monitoring pressure in tyre based on ABS; Comprise the TPMS sensor unit that is used to detect the pressure and temperature in the tire; Said TPMS sensor unit is connected with a radiofrequency launcher; Also comprise the wheel speed sensors that is used for the inspection vehicle wheel speed, said wheel speed sensors is connected with the ABS system through data line, and said ABS system also is connected with one and is used to receive the radio frequency receiver from the detection data of TPMS sensor unit.
Further as preferred embodiment; Said TPMS sensor unit comprises pressure sensor and temperature sensor; Said pressure sensor and temperature sensor are connected with a sensor processing chip, and the FPDP of said sensor processing chip is connected with said radiofrequency launcher.
Further as preferred embodiment, said radiofrequency launcher is connected with antenna, and said antenna is positioned at the position of wheel nave near valve nozzle, and said antenna is a helical antenna.
Further as preferred embodiment, said ABS system comprises abs controller, and said abs controller is connected with and is used for the fault alarm module of when tire pressure or temperature surpass threshold value, reporting to the police.
Further as preferred embodiment, said fault alarm module is indicator lamp or buzzer phone.
Further as preferred embodiment, said radiofrequency launcher is through carrying out radio communication between signal repeater and the radio frequency receiver.
The beneficial effect of the utility model is: the utility model system for monitoring pressure in tyre; Combination through TPMS system and ABS system; Each tire rotational speed of utilizing abs controller and wheel speed sensors in the ABS system to detect, each tire rotational speed difference relatively is with the monitoring tire pressure; Also receive the supplemental characteristic that the TPMS sensor unit detects the inside tires that obtains simultaneously, with the running state of monitoring tire through radio communication; Obtain the inner pressure of tire force data in several ways, both efficiently solved the problem that high-frequency wireless communication is obstructed easily and is disturbed, improved the reliability of whole monitoring system again.And the utility model system for monitoring pressure in tyre can have wide range of applications easily for the automobile upgrading of ABS system originally was housed based on the combination of ABS and TPMS.
Description of drawings
Be described further below in conjunction with the specific embodiment of accompanying drawing the utility model:
Fig. 1 is the functional-block diagram of utility model system for monitoring pressure in tyre;
Fig. 2 is the functional-block diagram of the utility model TPMS sensor unit;
Fig. 3 is the schematic circuit diagram of radiofrequency launcher among the utility model embodiment;
Fig. 4 is the schematic circuit diagram of radio frequency receiver among the utility model embodiment.
The specific embodiment
With reference to Fig. 1; A kind of system for monitoring pressure in tyre based on ABS; Comprise the TPMS sensor unit 10 that is used to detect the pressure and temperature in the tire, said TPMS sensor unit 10 is connected with a radiofrequency launcher 20, also comprises the wheel speed sensors 50 that is used for the inspection vehicle wheel speed; Said wheel speed sensors 50 is connected with ABS system 40 through data line, and said ABS system 40 also is connected with one and is used to receive the radio frequency receiver 30 from the detection data of TPMS sensor unit 10.
Preferably; With reference to Fig. 2; Said TPMS sensor unit 10 comprises pressure sensor 11 and temperature sensor 12, and said pressure sensor 11 is connected with a sensor processing chip 13 with temperature sensor 12, and the FPDP of said sensor processing chip 13 is connected with said radiofrequency launcher 20.TPMS sensor unit 10 is the integrated SOC(system on a chip) modules of semiconductor pressure sensor, semiconductor temperature sensor, digital signal processing unit and power supervisor.In order to strengthen the tire pressure measuring ability; Having has also increased acceleration pick-up, voltage detecting, internal clocking, house dog and with the ASIC digital signal processing unit or the MCU of 12 bit ADC, 4k ByteFlash, 2k ROM, 128 Byte RAM, 128 Byte EEPROM and other function in many TPMS sensor units.These functional chips make the TPMS sensor unit can not only detect variation of temperature in tire pressure and the tire in the start in real time, and can also realize that automobile moves instant start, wakes, saves function such as electric energy automatically up.Power supervisor guarantees that system realizes low-power consumption, and a joint lithium cell can be used 3 ~ 5 years.Along with the progress of chip technology, TPMS sensor unit 10 develops towards Highgrade integration, simplification, wireless and passive direction.
Preferably, radiofrequency launcher 20 is connected with antenna, and its antenna is positioned at wheel hub near valve nozzle, thus must consider when designing antenna that metal wheel hub and wheel are run at high speed the time antenna constantly change direction, the influence of angle.Helical antenna possibly be a kind of reasonable selection, and it can enlarge the angle that transmits and receives, and overcomes quiet dynamic blind spot effectively.The straight warp (D) of helical antenna, the number of turns (N), circle spacing (S), helical angle (α) have determined efficient, gain and the directivity of antenna.
But truck is with 36 of radiofrequency launcher 20 as many as of TPMS system, and therefore the signal of tens wheels in back is all wanted relay and transfer, on vehicle body, adds signal repeater for this reason.Because the distance of present truck from the trailing wheel to the operator's compartment is about 10 meters; Superimposed trailer is longer; The emissive power of radiofrequency launcher 20 is as surpassing 10dBm; Entire product and system will accept radio control cuncil control so, so the emissive power of the nearly all TPMS system in the whole world is all below this, and signal repeater can shorten the receiving range of radio frequency receiver 30 and improve reception.
With reference to Fig. 3, in a preferred embodiment, sensor processing chip 13 is single chip computer AT 89C205l.AT89C2051 is totally 20 pins, and wherein P1 mouth 8 pin can be used as general accurate bidirectional port, on the power-handling capability of pin, have very strong pull-down capability.Operating voltage is 2.7～6V.When operating voltage during at 3V, 1/4 when electric current is equivalent to 6V work is 1mA when idle, is merely 20mA during power down.So little power consumption is well suited for battery powered size control system.Radiofrequency launcher 20 is MC33493, and the MC33493 chip is the integrated UHF radio transmitting of a high temperature module.Can carry out two kinds of modulation systems of OOK (On-Off Keying) or FSK (Frequency Shift Keying).This chip operation is in 300～450 MHz frequency ranges; Have FSK and OOK modulation and demodulation ability, antijamming capability is strong; Frequency stability is good; Have less emissive power, O.18mW maximum transmission power reaches; 1.9～3.6V low-work voltage; Low in energy consumption, electric current 11.6mA during emission, the emission readiness for action is merely O.8 μ A (operating temperature is at 125 ℃).As shown in Figure 3, in the MC33493 chip, pin 3 (BAND pin) connects the 3V high level, and expression system transmitting frequency is 434MHz, is used to select frequency of operation; Pin 14 (MODE pin) connects high level, and the FSK modulating mode is selected by the expression system.The FSK modulation system is defined as two different frequency shift values of a signal and representes the high and low two kinds of level of numeral respectively.
Because the MC33493 operation level is 3V to the maximum, and microcontroller AT89C2051 operation level is 5V to the maximum, realizes connecting and just must carry out level conversion.System's power supply is the MC33493 chip power supply for 5V through level shifting circuit.Chip MC33493 links to each other with micro controller system through level transferring chip, realizes the two-way transmission of data.It constitutes wireless system for transmitting data with AT89C2051 micro controller system and radio frequency receiver.
Radio frequency receiver generally adopts the MC33594 chip, and physical circuit figure is with reference to Fig. 4.
Further, said ABS system 40 comprises abs controller 41, and said abs controller 41 is connected with and is used for the fault alarm module 42 of when tire pressure or temperature surpass threshold value, reporting to the police.After abs controller 41 receives the data-signal from wheel speed sensors 50; Through the in-to-in arithmetic and logic unit data are handled; The tire pressure data that draws after handling and the tire pressure threshold value of program setting are compared,, then report to the police through fault alarm module 42 if exceed threshold value.Abs controller 41 can also receive the pressure data and the temperature data of detected each inside tires of TPMS sensor units through radio frequency receiver 30, will compare through the threshold value that radio communication is obtained above-mentioned pressure data and temperature data and program setting to reach the purpose of timely warning when the motor tire work et out of order.Like this; The utility model system for monitoring pressure in tyre both can obtain tire pressure data through wheel speed sensors 50; Can obtain supplemental characteristics such as pressure in the tire, temperature from the TPMS sensor unit through radio communication again, can ensure the reliability and the safety of system for monitoring pressure in tyre.
Preferably; Said fault alarm module 42 is indicator lamp or buzzer phone; For example can point out tire pressure to report to the police with specific sudden strain of a muscle sign indicating number through indicator lamp, the tire pressure alert data then can be stored in the internal storage of abs controller, and the ABS system then stop mechanism of Control of Automobile carries out brake operating according to breakdown signal; Forced brake when guaranteeing at the tire pressure of motor tire that temperature is too high in the excessive or tire is with guarantee driving safety.
More than be that preferable enforcement to the utility model specifies; But the utility model is created and is not limited to said embodiment; Those of ordinary skill in the art can also make all equivalent variations or replacement under the prerequisite of the utility model spirit, distortion that these are equal to or replacement all are included in the application's claim institute restricted portion.
Claims (6)
1. system for monitoring pressure in tyre based on ABS; Comprise the TPMS sensor unit (10) that is used to detect the pressure and temperature in the tire; Said TPMS sensor unit (10) is connected with a radiofrequency launcher (20); It is characterized in that: also comprise the wheel speed sensors (50) that is used for the inspection vehicle wheel speed; Said wheel speed sensors (50) is connected with ABS system (40) through data line, and said ABS system (40) also is connected with one and is used for receiving the radio frequency receiver (30) from the detection data of TPMS sensor unit (10).
2. a kind of system for monitoring pressure in tyre according to claim 1 based on ABS; It is characterized in that: said TPMS sensor unit (10) comprises pressure sensor (11) and temperature sensor (12); Said pressure sensor (11) and temperature sensor (12) are connected with a sensor processing chip (13), and the FPDP of said sensor processing chip (13) is connected with said radiofrequency launcher (20).
3. a kind of system for monitoring pressure in tyre based on ABS according to claim 1 is characterized in that: said radiofrequency launcher (20) is connected with antenna, and said antenna is positioned at the position of wheel nave near valve nozzle, and said antenna is a helical antenna.
4. a kind of system for monitoring pressure in tyre according to claim 1 based on ABS; It is characterized in that: said ABS system (40) comprises abs controller (41), and said abs controller (41) is connected with and is used for the fault alarm module (42) of when tire pressure or temperature surpass threshold value, reporting to the police.
5. a kind of system for monitoring pressure in tyre based on ABS according to claim 4 is characterized in that: said fault alarm module (42) is indicator lamp or buzzer phone.
6. according to each described a kind of system for monitoring pressure in tyre based on ABS of claim 1 to 5, it is characterized in that: said radiofrequency launcher (20) is through carrying out radio communication between signal repeater and the radio frequency receiver (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200840617U CN202491645U (en) | 2012-03-08 | 2012-03-08 | ABS(anti-lock brake system)-based tire pressure monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200840617U CN202491645U (en) | 2012-03-08 | 2012-03-08 | ABS(anti-lock brake system)-based tire pressure monitoring system |
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| Publication Number | Publication Date |
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| CN202491645U true CN202491645U (en) | 2012-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200840617U Expired - Lifetime CN202491645U (en) | 2012-03-08 | 2012-03-08 | ABS(anti-lock brake system)-based tire pressure monitoring system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104385861A (en) * | 2014-10-21 | 2015-03-04 | 中山市六源通电子科技有限公司 | Multifunctional tire pressure monitoring system |
| CN105922824A (en) * | 2016-05-16 | 2016-09-07 | 管晨光 | Temperature alarm system |
| CN113165455A (en) * | 2019-08-29 | 2021-07-23 | 太平洋工业株式会社 | Transmitter, receiver, and transmission/reception system |
-
2012
- 2012-03-08 CN CN2012200840617U patent/CN202491645U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104385861A (en) * | 2014-10-21 | 2015-03-04 | 中山市六源通电子科技有限公司 | Multifunctional tire pressure monitoring system |
| CN105922824A (en) * | 2016-05-16 | 2016-09-07 | 管晨光 | Temperature alarm system |
| CN113165455A (en) * | 2019-08-29 | 2021-07-23 | 太平洋工业株式会社 | Transmitter, receiver, and transmission/reception system |
| CN113165455B (en) * | 2019-08-29 | 2023-03-21 | 太平洋工业株式会社 | Transmitter, receiver, and transmission/reception system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GUANGZHOU KORMEE ELECTRONIC CONTROL TECHNOLOGY CO. Free format text: FORMER NAME: GEOPHYSICAL EXPLORATION CO., CHINA PETROCHEMICAL SHENGLI OIL FIELD |
|
| CP03 | Change of name, title or address |
Address after: 510663 Guangdong province Guangzhou Science City Economic and Technological Development Zone Nanxiang branch No. 1 Patentee after: GUANGZHOU KORMEE AUTOMOTIVE ELECTRONIC CONTROL TECHNOLOGY CO., LTD. Address before: Guangzhou City, Luogang District Science City, Guangdong province 510663 Nanxiang branch No. 1 Patentee before: Guangzhou Kemi Automobile Brake Technology Development Co., Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 510663 Guangdong province Guangzhou Science City Economic and Technological Development Zone Nanxiang branch No. 1 Patentee after: Guangzhou Ruili Comet automobile electronic Limited by Share Ltd Address before: 510663 Guangdong province Guangzhou Science City Economic and Technological Development Zone Nanxiang branch No. 1 Patentee before: GUANGZHOU KORMEE AUTOMOTIVE ELECTRONIC CONTROL TECHNOLOGY CO., LTD. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20121017 |
|
| CX01 | Expiry of patent term |