CN2878110Y

CN2878110Y - Explosion-proof monitoring apparatus for car tyre

Info

Publication number: CN2878110Y
Application number: CN 200620068744
Authority: CN
Inventors: 刘柏榆; 冯一波; 唐美华
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-01-16
Filing date: 2006-01-16
Publication date: 2007-03-14
Anticipated expiration: 2016-01-16

Abstract

An automobile tire explosion-proof monitoring device comprises a plurality of ejectors, an acceptor and a display, wherein the displays are mounted in every tire, and the acceptor and the display are integrated as one and are arranged in the driving cap. The ejectors are composed of lithium-argon batteries, MPXY8020 chips, MC68HC909RF2 chips and launching aerials Tx, wherein the MPXY8020 chip is provided with a pressure sensing device, a heat meter and a signal amplifier, and the MC68HC909RF2 chip includes a signal processor MCU and an electronic component with arousal function. The acceptor includes a receiving aerial Tx, an MC33594 chip, an M68HC908GT16 chip and the display LCD. The utility model is capable of measuring the air pressure and temperature in the automobile tire directly, and realizing data collection, analysis, processing and then emitting data to a warning receiver by radio modulation. The utility model displays the data temperature, data pressure and the current state of each tire on a liquid crystal display, and is able to give alarm when the air pressure is too low or the effusion is too fast or the temperature is too high.

Description

Tire Explosion-Proof Surveillance Device

Technical field:

The utility model relates to a kind of control setup of vehicle safety travel, relates in particular to the explosion-proof control setup of motor tire.

Background technology:

The explosion-proof control setup of motor tire abbreviates " TPMS " abroad as, and it is the english abbreviation of automotive tire pressure supervisory system " Tire Pressure Monitoring System ", be mainly used in real-time tire pressure is monitored automatically when running car, tire flat, high infrabar and high temperature are reported to the police.The same ride safety of automobile that all belongs to of ABS, EDS, EPS, safety strap and the safety air bag etc. of it and automobile ensures series products, its objective is the support vehicles driving safety, is that motorist, rider's life security ensures forewarn system.Their difference is that the latter all belongs to " passive afterwards security type ", and the former then is " an active security type in advance ".Promptly when tire danger occurs and blows out sign, in time send warning, danger is eliminated in bud to chaufeur.

In the process of running at high speed of automobile, it is that all drivers worry it also is the most difficult prevention the most that tire fault takes place, and it is the major reason that sudden traffic accident takes place.According to statistics, the traffic accident that takes place on express highway has 70%-80% to cause owing to blowing out.The modern study achievement shows that automotive tire pressure is lower than normal value at 10% o'clock, and tire life reduces 15%.Air pressure is too high then to make tare concentrate in the tyre surface in the heart, causes the tyre surface center to wear away fast, is easy to generate wound, even produces and blow out, and the tyre surface overtension causes tyre surface delamination and tyre surface bottom of trench be full of cracks tire earth-grasping force to reduce, and brake causes fault.Reduce the tire damage, prolonging tire life is the content that autoist extremely is concerned about.Air pressure of automobile tire is lower than standard pressure 30%, and oil consumption then increases by 10%.Keep tire internal gas pressure standard that automobile is normally moved, improve comfort level, and can also be energy-conservation, this is that owner is most popular.Thus, TPMS-automotive tire pressure supervisory system is the ideal tools that realizes that air pressure and temperature to motor tire monitor.Therefore, passed through the TREAD bill in US Congress in 2000.One of requirement of TREAD bill is by 2007, and all automobiles of selling in the U.S. all must be installed tire pressure monitoring system.

China is becoming the maximum automotive market in the whole world, the trend of accelerated growth has appearred in Chinese automobile demand and recoverable amount, automobile pollution has been broken through 2,600 ten thousand, and a year selling automobiles will be broken through 6,000,000, and the five-year will become the only world's second largest auto sale state of the second son U.S..Automotive safety will become the focus that autoist is concerned about the most.The TPMS system is at the early-stage in China, in the State Standard of the People's Republic of China of on November 24th, 2003 promulgation-" self-propelled vehicle safe in operation engineering factor＜exposure draft〉", also, tire inflation pressure determining apparatus made explanation: " vehicle commander should install tire pressure warning device greater than 6 meters long-distance bus and tourist coach, maximum design total mass greater than 12 tons goods carrying vehicle and loading tractor truck " to being installed.Domestic automobile producer does not carry out the research of this respect now, and after the China's entry into the WTO, along with international requirement, we must develop the TPMS product with independent intellectual property right.

Summary of the invention:

Goal of the invention of the present utility model is to provide a kind of Tire Explosion-Proof Surveillance Device, and it can carry out real-time detection and send early warning tire pressure, temperature.

Technical solution adopted in the utility model is:

Tire Explosion-Proof Surveillance Device described in the utility model, comprise several projectors (corresponding) with wheel, a receptor and a telltale, projector is separately positioned in each tire, receptor and telltale are combined into one, it is indoor to be arranged on vehicle drive, described projector comprises the inferior battery of lithium, the MPXY8020A chip, MC68HC909RF2 chip and emitting antenna Tx, in the MPXY8020A chip, contain pressure sensor, temperature sensor and signal amplifier comprise signal processor MCU and have the arousal function electronic component in the MC68HC909RF2 chip; Described receptor comprises receiving wire Tx, MC33594 chip, M68HC908GT16 chip and display lcd, and their power supply is the storage battery that automobile is furnished with.

Owing to be provided with pressure sensor and temperature sensor in the projector, it can directly measure air pressure and temperature in the tire, finish data acquisition, analysis, processing and emission function, be transmitted on the reception monitoring device that is installed in the operator's compartment by wireless-modulated, finish reception, computing and the processing capacity of related data.It shows temperature, pressure data and the current state of each tire on a liquid crystal display.Too low when tire pressure, infiltration is too fast or temperature when too high, system provides the alarm indication automatically.And enough external buttons are arranged as input equipment, system's control flexibly and configuration feature are provided, really accomplish to control and follow one's inclinations, and have sufficient backwards compatibility.

Description of drawings:

Fig. 1 is a structured flowchart of the present utility model;

Fig. 2 is the transmitter circuit block scheme; Fig. 3 is the collector circuit block diagram;

Fig. 4 is the workflow diagram of projector; Fig. 5 is the workflow diagram of collector;

The specific embodiment:

TPMS product described in the utility model is made up of four projectors, a receptor and a telltale, and projector is installed in each respectively and takes turns tyre cavity, and receptor and telltale are combined into one, and it is indoor to be arranged on vehicle drive.Described projector comprises the inferior battery of lithium, MPXY8020A chip, MC68HC909RF2 chip and emitting antenna Tx, in the MPXY8020A chip, contain pressure sensor, temperature sensor and signal amplifier, in the MC68HC909RF2 chip, comprise signal processor MCU and have the arousal function electronic component; Described receptor comprises receiving wire Tx, MC33594 chip, M68HC908GT16 chip and display lcd, and their power supply is the storage battery that automobile is furnished with.

Principle of work general introduction of the present utility model: TPMS (system for monitoring pressure in tyre) is a vehicle electronics series products that is used for monitoring automobile tyre pressure.Its main purpose is for the user provides current real-time tire pressure and temperature data, makes the decision that reduces the speed of a motor vehicle, parking checking, inflates operations such as tire patching and maintenance/changing of tire to help the user.

Projector principle of work: after projector powers on, directly enter dormant state behind the CPU initialization system.System sends a signal per 3 seconds and wakes CPU up.CPU is waken up the back and checks current tire pressure value, and the force value of storage compared when last time waking up, had judged whether gas leak phenomenon.If the discovery tire flat, then projector can be launched 10 leakage alarm signals continuously, waits for next time then and detecting.If find gas leakage, CPU checks the normal transmission time that whether arrived, and enters dormancy once more if not projector then and waits for and being waken up next time.If current just in time is normal transmission time (emission in per five minutes once), projector is then checked the temperature value when front tyre, simultaneously, whether the temperature and pressure value that CPU can relatively gather paranormal scope, otherwise just will be position, corresponding warning mark position, projector is the pressure and temperature value of being gathered then, and warning mark sends to receptor, and last projector enters dormancy once more and waits for and being waken up next time.

The receiver operation principle: receptor at first carries out initialization to system after powering on, and enters into the state that receives data of waiting for then.If finding has quantitative data input, CPU then at first the data that receive to be checked, make mistakes in case find data check, then the misdata that receives is abandoned, reenter the state that receives of waiting for.If the data that receive are correct, it is to be shown that CPU can deliver to specific region etc. to the pressure and temperature value that receives, and checks simultaneously whether warning mark is arranged.Finding that the data that receive have under the unusual situation, CPU can send different audible alarms according to the emergency priority of reporting to the police, otherwise receptor just continues to wait for the next gathering data arrival that receives.This audible alarm must be confirmed and could be removed by the manual keypad of chaufeur, with guarantee alarm message not by the people for ignoring.

In receiver operation, per 10 milliseconds can produce a regularly interruption.In this interrupted, CPU can check the on-keyboard input, if the keyboard input is arranged, then revised alarm threshold, tire sequence number or system's setting according to the different content of input.Simultaneously, the per 50 milliseconds of meetings of system refresh the displaying contents of a LCD, to guarantee that up-to-date tire pressure that obtains and temperature data and alarm condition can in time obtain upgrading.

The utility model possesses following performance:

1. in the large screen display of receptor, can show four kinds of numerical value of ℃ (), Kpa (Psi) simultaneously;

2. but automatic circulation shows or forces to show the relevant numerical value of each tire;

3. provide tire high temperature, high pressure, low pressure, quick gas leakage, battery to owe six kinds of visual alert indications such as low pressure, communication failure and multistage sound alarm;

4. operating temperature is-40 ℃～125 ℃, and particularly emitter has adopted the antenna and the high strength ABS plastic body seal of the ripe chip of high stable, the inferior battery of lithium, high-quality gain and directional pattern, satisfies harsies environment such as the interior high temperature of tire, high pressure, aqueous vapor and uses.

5. emissive power is greater than 5dbm, less than 10dbm; Minimum receiving sensitivity is not more than-120dbm;

6. adopted little power consumption design, can reach service life more than 5 years;

7. sufficient redundant surge current inhibition, transient state overvoltage inhibition and ESD protection are provided, satisfy the EMI/EMC requirement;

8. the setting of temperature, air pressure threshold value is provided, and the black box function of complete documentation automobile travel data is arranged;

9. provide the liquid crystal background of optional majority color to show.

Claims

1, a kind of Tire Explosion-Proof Surveillance Device, it is characterized in that: comprise several projectors (corresponding) with wheel, a receptor and a telltale, projector is installed in respectively in each tire, receptor and telltale are combined into one, and it is indoor to be arranged on vehicle drive, described projector comprises battery, the MPXY8020A chip, MC68HC909RF2 chip and emitting antenna Tx, in the MPXY8020A chip, contain pressure sensor, temperature sensor and signal amplifier comprise signal processor MCU and have the arousal function electronic component in the MC68HC909RF2 chip; Described receptor comprises receiving wire Tx, MC33594 chip, M68HC908GT16 chip and display lcd, and their power supply is the storage battery that automobile is furnished with.