CN202480794U - Short-distance passive tire pressure monitoring system - Google Patents
Short-distance passive tire pressure monitoring system Download PDFInfo
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- CN202480794U CN202480794U CN2011204930463U CN201120493046U CN202480794U CN 202480794 U CN202480794 U CN 202480794U CN 2011204930463 U CN2011204930463 U CN 2011204930463U CN 201120493046 U CN201120493046 U CN 201120493046U CN 202480794 U CN202480794 U CN 202480794U
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- rfid
- tpms
- tire
- tire pressure
- microcontroller
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Abstract
The utility model discloses a short-distance passive tire pressure monitoring system which comprises an electronic control unit, a Tire Pressure Monitor System (TPMS) Radio Frequency Identification Device (RFID) installed inside an automobile tire and a RFID reader installed outside the automobile tire. The TPMS RFID comprises an antenna coil, a RFID chip, a magnetic-electric converter, a microcontroller, a pressure sensor and a temperature sensor. The pressure sensor and the temperature sensor are connected with the microcontroller, the microcontroller and the magnetic-electric converter are connected, and the magnetic-electric converter is connected with the RFID reader in a radio frequency mode through the RFID chip and the antenna coil. Compared with the prior art, the short-distance passive tire pressure monitoring system adopts the RFID technology, converts magnetic energy into electric energy and provides the electric energy for the TPMS RFID to work, achieves passivation of the TPMS RFID installed in the automobile tire and solves the problems that a current active direct tire pressure monitoring system has a limited service life of a battery and is prone to causing interference between automobiles. At the same time, the short-distance passive tire pressure monitoring system solves the problem that an increase of the number of automobile tires causes the complexity of the system to increase and the reliability to reduce, and therefore has strong expandability of TPMS measuring technology for automobile types with different numbers of tires.
Description
Technical field
The utility model belongs to vehicle-state real time monitoring field, and what be specifically related to is a kind of closely passive system for monitoring pressure in tyre.
Background technology
Motor tire is by rubber, framework material (metal or fiber); Compositions such as steel bead wire; Be responsible for supporting the quality of automobile and power is delivered to ground; Be the vitals of automobile traveling, so tyre performance to the automotive performance influence greatly, the parameter that influences tyre performance comprises tire material, structure and tire pressure etc.Wherein the height of automotive tire pressure directly influences load-carrying capacity, deceleration and stopping performance (safety), high speed performance and the traveling comfort of car load.
Motor tire by the inflation pressure size be divided into high pressure tyre (0.5-0.7MPa), low pressure tire (0.15-0.5MPa) and extra low pressure tire (＜0.15MPa).Suitable tire pressure helps reducing Abnormity abrasion about tyre, obtains good road holding, and automobile is when running at high speed, and the phenomenon of blowing out happens occasionally, and especially the anterior steering tire of car is blown out very big to the safety effects of vehicle.
In the process of running at high speed of automobile, tire fault is that the lethality maximum also is the most difficult accident potential that prevents, and is the major reason that sudden traffic accident takes place.For preventing to blow out; Need detect tire pressure; Therefore system for monitoring pressure in tyre (TPMS) is considered to automobile three big safety systems with safe automobile air bag, anti-skid brake system (ABS); TPMS is mainly used in vehicle traveling process tire pressure is carried out real-time automatic monitoring, and tire flat and infrabar are reported to the police, to guarantee traffic safety.
At present, 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), 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, belongs to passive-type afterwards.
Another kind is direct-type (Pressure-Sensor Based TPMS; Be called for short PSB), this system utilizes to be installed in the air pressure that each pressure sensor of taking turns tyre cavity comes direct drawings, utilizes wireless launcher that pressure information is sent to the system on the central receiver module from inside tires; Then each tire pressure data is shown; In too low or when gas leakage when tire pressure, system can auto alarm, belongs to initiatively defensive in advance.
Immediate system is installed a built-in sensors on the tire dice of tire, comprise in the sensor that the bridge type electron gas pressure sensitivity of induction air pressure should be installed, and it converts air pressure signal into electric signal; Through wireless launcher signal is emitted; Being implemented under driving or the static state, data such as the pressure of real time monitoring tire, temperature, and be transmitted into receptor through wireless mode; On telltale, show various data variation or with forms such as buzzings; Remind the motorist, and change at tire flat and pressure and to surpass safe thresholding (this threshold value can through the telltale setting) time and report to the police, with guarantee driving safety.Because immediate system can be measured the actual wink of each inside tires at any time and press, and is easy to confirm the fault tire, has the high characteristics of accuracy rate, therefore uses comparatively extensive.
Yet present immediate system mainly be active folk prescription to communication, the sensor that wherein is installed in the tire adopts the disposable battery power supply, its battery service life is generally about 6 years, and cost is higher; And have the probability of disturbing mutually between a plurality of projectors of active TPMS of while system, when causing vehicle operating easily, have the possibility that interferes with each other between each vehicle, and the signal transmitting range of existing active projector does not wait at 10-20 rice.
The utility model content
For this reason, the purpose of the utility model is to provide a kind of closely passive system for monitoring pressure in tyre, and is limited service life to solve the existing battery of present active direct-type system for monitoring pressure in tyre, and causes existing between each vehicle the problem of disturbing easily.
For realizing above-mentioned purpose, the utility model mainly adopts following technical scheme:
A kind of closely passive system for monitoring pressure in tyre; Comprise electronic control unit, be installed in the TPMS RFID unit in the motor tire and be installed in the exterior rfid interrogator of motor tire; Said TPMS RFID unit is made up of aerial coil, RFID chip, magnetoelastic transducer, microcontroller, pressure sensor and temperature sensor etc.; Said pressure sensor is connected with microcontroller with temperature sensor; Said microcontroller is connected with magnetoelastic transducer, and magnetoelastic transducer is connected with the rfid interrogator less radio-frequency through RFID chip and aerial coil.
Wherein said electronic control unit also is connected with an alarm display unit.
Wherein be installed in the TPMS RFID unit above the tire and be installed in spacing between the exterior rfid interrogator of motor tire in 2 meters.
Wherein said electronic control unit is connected through automobile bus with rfid interrogator or connects communication through wireless mode.
The utility model is through installing TPMS RFID unit in motor tire; Through TPMS RFID element antenna coil received RF signal; And converting electric energy to for microcontroller work through the RFID chip, microcontroller receives real-time pressure and temperature data in the tire through the temperature and pressure sensor; And it is sent to rfid interrogator through RFID chip and aerial coil; Electronic control unit judges according to the data that rfid interrogator read, and sends to the alarm display unit, and the situation that tire is current is carried out alarm display.Compared with prior art; The utility model adopts the RFID radio-frequency technique; Convert magnetic energy to electric energy and supply TPMS RFID cell operation, realized installing in the motor tire passiveization of TPMS RFID unit, solved the existing battery of present active direct-type system for monitoring pressure in tyre limited problem in service life; And the utility model need not have the LF arousal function of product-derived now, can save emitter cost about 5%; Especially closely the closely monitoring of adopting; Can effectively avoid having the problem of disturbing between each vehicle, owing to adopt native system ECU active mode, TPMS RFID unit can not need have the acceleration pick-up part of active mode now; Directly adopt the conventional truck bus to obtain speed of a motor vehicle mode; More accurate reliable, the TPMS monitoring method is more flexible, can further save cost.
Description of drawings
Fig. 1 is the system principle diagram of the utility model.
The specific embodiment
For setting forth the thought and the purpose of the utility model, will combine accompanying drawing and specific embodiment that the utility model is done further explanation below.
See also shown in Figure 1ly, Fig. 1 is the system principle diagram of the utility model.The utility model provides a kind of closely passive system for monitoring pressure in tyre, is mainly used in that to solve the existing battery of present active direct-type system for monitoring pressure in tyre limited service life, and causes existing between each vehicle the problem of disturbing easily.
Wherein this system mainly includes alarm display unit, electronic control unit (ECU), is installed in the TPMS RFID unit above the motor tire and is installed in the exterior rfid interrogator of motor tire, and electronic control unit is connected communication through automobile bus or wireless mode respectively with alarm display unit, rfid interrogator.
TPMS RFID gets final product inside and outside being installed in tire; Be used for data such as drawings internal pressure, temperature; Rfid interrogator can be installed near the outside tires, can be controlled in 2 meters with TPMS RFID communication distance, and the practical communication distance can be selected according to the vehicle tyre actual size.Be preferably in the utility model in 1 meter.
TPMS RFID unit is made up of aerial coil, RFID chip, magnetoelastic transducer, microcontroller, pressure sensor and temperature sensor; Said pressure sensor is connected with microcontroller with temperature sensor; Said microcontroller is connected with magnetoelastic transducer, and magnetoelastic transducer is connected with the rfid interrogator less radio-frequency through RFID chip and aerial coil.
The principle of work of the utility model is: when need measuring through ECU to being installed in the rfid interrogator transmitting control commands of each outside tires, activate the TPMS RFID above the tire by rfid interrogator emission RF energy.
TPMS RFID aerial coil above the tire and RFID chip convert the RF energy of receiving to electric energy through magnetoelastic transducer and store, and provide follow-up work required electric energy for simultaneously the microcontroller among the TPMS RFID.After power supply is stable, start working, and receive the order that the rfid interrogator radio frequency sends successively.TPMS RFID is to command analysis with after handling; Continue power supply through radio frequency conversion energy stored; And through pressure sensor and temperature sensor each status information of tire is postbacked to rfid interrogator, the RFID read write line is passed to the ECU unit with data after receiving wireless signal; Finally by the various data of ECU cell processing, and accomplish functions such as alarm and demonstration.
Adopt the described system of the utility model to improve the safety that TPMS measures feedway, ECU is active closely to be read owing to adopt in the native system, can avoid the wireless signal of the tire of Ben Che and other vehicles to disturb fully; Improved the ease for use that TPMS measures feedway, need be to the pairing of each TPMS emission measurement device, can not make the driver initiatively understand the state of vehicle tyre whenever and wherever possible fast, when comprising static parking.
TPMS measurement technique extensibility for the vehicle of different kinds of tyre number is strong; Because system's all mode of operations of each peripheral hardware are by the ECU ACTIVE CONTROL; And the short-range communication mode, therefore do not exist and consider that the tire number increases, need the transmitter module emissive power to increase; Cause system complexity to increase, wireless influence of disturbing the probability increase mutually between battery life reduction and system's tire.
Simultaneously the described system of the utility model can reduce the cost of TPMS measuring system greatly, and the emitter battery cost of active TPMS system accounts for the 30%-40% of emitter total cost, and native system then need not battery; Native system prolongs the service life that TPMS measures feedway greatly, the emitter battery life of active TPMS system generally about 6 years, not reproducible utilization, native system does not then have the restriction in service life; Native system adopts vehicle-mounted direct current chargeable battery cycle power, helps the environmental protection and energy saving of automotive electronic industry greatly;
In addition, the utility model can not need have the LF arousal function of product-derived now, can save emitter cost about 5%; And closely the method for passive communication can directly be supported existing arousal function, satisfies functions such as motor tire maintainability test.
More than be that a kind of passive system for monitoring pressure in tyre that the utility model is provided has carried out detailed introduction; Used concrete example among this paper the structural principle and the embodiment of the utility model are set forth, above embodiment just is used to help to understand the method and the core concept thereof of the utility model; Simultaneously, for one of ordinary skill in the art, according to the thought of the utility model, the part that on the specific embodiment and field of application, all can change, in sum, this description should not be construed as the restriction to the utility model.
Claims (4)
1. closely passive system for monitoring pressure in tyre; It is characterized in that comprising electronic control unit, be installed in the TPMS RFID unit in the motor tire and be installed in the exterior rfid interrogator of motor tire; Said TPMS RFID unit is made up of aerial coil, RFID chip, magnetoelastic transducer, microcontroller, pressure sensor and temperature sensor; Said pressure sensor is connected with microcontroller with temperature sensor; Said microcontroller is connected with magnetoelastic transducer, and magnetoelastic transducer is connected with the rfid interrogator less radio-frequency through RFID chip and aerial coil.
2. closely passive system for monitoring pressure in tyre according to claim 1 is characterized in that said electronic control unit also is connected with an alarm display unit.
3. closely passive system for monitoring pressure in tyre according to claim 1 is characterized in that being installed in the TPMS RFID unit above the tire and is installed in spacing between the exterior rfid interrogator of motor tire in 2 meters.
4. closely passive system for monitoring pressure in tyre according to claim 1 is characterized in that said electronic control unit is connected through automobile bus with rfid interrogator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204930463U CN202480794U (en) | 2011-11-30 | 2011-11-30 | Short-distance passive tire pressure monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204930463U CN202480794U (en) | 2011-11-30 | 2011-11-30 | Short-distance passive tire pressure monitoring system |
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| Publication Number | Publication Date |
|---|---|
| CN202480794U true CN202480794U (en) | 2012-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204930463U Expired - Fee Related CN202480794U (en) | 2011-11-30 | 2011-11-30 | Short-distance passive tire pressure monitoring system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102490555A (en) * | 2011-11-30 | 2012-06-13 | 深圳市元征软件开发有限公司 | Close-range passive tire pressure monitor system and communication method |
| GB2545968A (en) * | 2015-12-22 | 2017-07-05 | Schrader Electronics Ltd | Advanced tire monitoring system |
| CN108556569A (en) * | 2018-04-09 | 2018-09-21 | 黄果树轮胎有限公司 | A kind of intelligent tire |
| CN114189561A (en) * | 2020-09-14 | 2022-03-15 | 锦湖轮胎有限公司 | Tire sensor configuration device and intelligent tire system comprising same |
-
2011
- 2011-11-30 CN CN2011204930463U patent/CN202480794U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102490555A (en) * | 2011-11-30 | 2012-06-13 | 深圳市元征软件开发有限公司 | Close-range passive tire pressure monitor system and communication method |
| GB2545968A (en) * | 2015-12-22 | 2017-07-05 | Schrader Electronics Ltd | Advanced tire monitoring system |
| GB2545968B (en) * | 2015-12-22 | 2019-06-26 | Schrader Electronics Ltd | Advanced tire monitoring system |
| US11099091B2 (en) | 2015-12-22 | 2021-08-24 | Schrader Electronics Limited | Advanced tire monitoring system |
| CN108556569A (en) * | 2018-04-09 | 2018-09-21 | 黄果树轮胎有限公司 | A kind of intelligent tire |
| CN114189561A (en) * | 2020-09-14 | 2022-03-15 | 锦湖轮胎有限公司 | Tire sensor configuration device and intelligent tire system comprising same |
| CN114189561B (en) * | 2020-09-14 | 2024-03-08 | 锦湖轮胎有限公司 | Tire sensor configuration apparatus and intelligent tire system including the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20191130 |
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| CF01 | Termination of patent right due to non-payment of annual fee |