CN2644194Y

CN2644194Y - Intelligent wireless alarm of automobile tyre pressure temperature

Info

Publication number: CN2644194Y
Application number: CN 03260079
Authority: CN
Inventors: 林诗海
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-06-12
Filing date: 2003-06-12
Publication date: 2004-09-29
Anticipated expiration: 2013-06-12

Abstract

The utility model relates to an intelligence wireless alarm of the temperature and pressure of the wheels of vehicle. The temperature transducer transforms the nocturnal radiation and environment temperature of the inner wall of the wheel into voltage signals. The air pressure electric transducer converts the pressure of the inner wheel into voltage signals. The above three signals are sent an operational amplifier T L 062 for amplification by electric connection. The amplified signals are then sent into the three A to D ports of a single chip P I C 12 C 672 and are converted into digital quantity by the A to D. The three digital quantity are sent out by a sending module that comprises a surface acoustic wave oscillator N D R4 33 A. Two 3.6 V button cell batteries supply electricity. An eccentric switch is connected on the electricity supply circuit of the electricity power source and the launcher. The signals of each wheel adopt time division multiplexing. The receiver is installed in the driving cab and adopts Micrf 011 demodulator. The demodulated digital signals are sent into a micro processor P I C 16 F 873 for processing and then sent into the LED for light and sound reminding. The utility model controls the pressure transducer of the same vehicle and sends signals with different time intervals so as to reduce cross interferences between the signals of the transducers and improve the receiving effect of the monitor receiver. The utility model adopts low energy consumption single chip and technology, wireless sending technology and the pressure transducer adopts pressure sensitive piece and membrane thermopile. The display of temperature and pressure and other functions are accurate with the precision of better than one percent.

Description

Automotive tire pressure temperature intelligent wireless alarm

Affiliated field: the utility model relates to a kind of automotive tire pressure temperature intelligent wireless alarm.

Background technology: domestic existing motor tire wireless alarm all is mounted in the valve place, damages easily, and is stolen.In addition some luxury cars are installed inconvenient.Energy consumption can't be monitored the temperature of tire greatly, tire is under steam because friction causes temperature to rise and air pressure is increased, temperature parameter in the tire is the important indicator that detects tire safety, will there be potential safety hazard if in time do not monitor, also how do not use the effective technology scheme of temperature parameter in the prior art the tire monitoring.

Summary of the invention: the purpose of this utility model provides a kind of sensitive monitoring, automotive tire pressure temperature intelligent wireless alarm accurately.The purpose of this utility model realizes by following structure: the utility model is a kind of automotive tire pressure temperature intelligent wireless alarm, temperature sensor becomes voltage signal with the infrared radiation and the ambient temperature of tire inner wall, the air pressure electric transducer becomes voltage signal with the tire internal pressure, three top voltage signals are sent into amplifier TL062 amplification respectively by being electrically connected, three amplifying signals are through being electrically connected 3 A/D ports sending into micro controller system PIC12C672, through A/D conversion becoming digital quantity, three digital quantities are launched through the emitting module that SAW oscillator NDR433A forms, two 3.6V button cell power supplies, centrifugal switch is connected on the feed circuit of power supply and projector, each tire signal adopts time division multiplex, receptor is installed in the operator's compartment, adopt Micrf011 demodulation device, digital signal after the demodulation is sent into microprocessor PIC16F873 and is handled, and send LED to show sound and light alarm.The utility model sends information by each tire pressure sensor of same car of microprocessor control with different time gaps, thereby has reduced the cross interference between sensor signal, has improved the reception that monitors receptor.Adopt low-power consumption monolithic and technology, wireless transmission technology, pressure sensor adopts pressure-sensitive device, and temperature sensor adopts film thermopile.In order to solve the problem low in energy consumption of feedway, take measures: (1) hardware aspect, the microprocessor PIC micro controller system and the amplifier of employing low-power consumption.(2) software aspect is by the power-on time of microprocessor programming Control feedway.Work-hours is about 400mS, and dormancy time is about 4S.(3) on the mode of operation, adopt the power supply of centrifugal switch control circuitry, promptly have only the speed of a motor vehicle to surpass certain speed per hour, circuit just begins powered operation, has reached the service life that prolongs emitter.Feedway is contained in respectively on the wheel hub of four-wheel.Projector is fixed on the wheel hub by a steel band, and in order not influence former dynamic balance of wheel, holding screw and projector are symmetrical, weight-matched.The utility model pressure, temperature demonstration and various function are correct, and precision is better than 1%.

Description of drawings:

Fig. 1 detects and the transmission circuit connection diagram for the utility model is whole

Fig. 2 is the utility model acceptor circuit figure

Fig. 3 is the utility model mounting structure figure

The specific embodiment:

The utility model as shown in Figure 1 is a kind of automotive tire pressure temperature intelligent wireless alarm, temperature sensor becomes voltage signal with the infrared radiation and the ambient temperature of tire inner wall, the air pressure electric transducer becomes voltage signal with the tire internal pressure, three top voltage signals are sent into amplifier TL062 amplification respectively by being electrically connected, three amplifying signals are through being electrically connected 3 A/D ports sending into micro controller system PIC12C672, through A/D conversion becoming digital quantity, three digital quantities are launched through the emitting module that SAW oscillator NDR433A forms, two 3.6V button cell power supplies, centrifugal switch is connected on the feed circuit of power supply and projector, each tire signal adopts time division multiplex, receptor is installed in the operator's compartment, adopt Micrf011 demodulation device, digital signal after the demodulation is sent into microprocessor PIC16F873 and is handled, and send LED to show sound and light alarm.

As shown in Figure 3, described temperature, pressure detects and unlimited feedway 1 is fixed on the wheel hub 3 by a steel band 2, and holding screw 4 detects with temperature, pressure and unlimited feedway 1 is the installation of symmetry.

As shown in Figure 2, described ballistic device is (title), and receptor adopts Micrf011 demodulation device, and temperature sensor is that thermopile adopts the Japanese Ceramic production TS-1NMB of company.

Temperature sensor is that thermopile adopts Japanese Ceramic company to produce TS-1NMB, and infrared radiation and the ambient temperature of tire inner wall become voltage signal, and air pressure electric transducer employing MD4500 becomes voltage signal with the tire internal pressure.Three top voltage signals, sending into amplifier TL062 respectively amplifies, three amplifying signals are sent into 3 A/D ports of micro controller system PIC12C672, through A/D conversion becoming digital quantity, three digital quantities, dividing three periods is that NDR433A launches through ballistic device, two 3.6V button cell power supplies by the power supply of centrifugal switch control projector, had been the centrifugal switch closures when the speed of a motor vehicle reaches 20km/H both, connect the power supply of projector, projector is measured and is launched.Receptor (being installed in the operator's compartment): adopt Micrf011 demodulation device, the digital signal after the demodulation is sent into microprocessor PIC16F873 and is handled, and send LED to show sound and light alarm.

Claims

1, a kind of automotive tire pressure temperature intelligent wireless alarm, it is characterized in that: temperature sensor becomes voltage signal with the infrared radiation and the ambient temperature of tire inner wall, the air pressure electric transducer becomes voltage signal with the tire internal pressure, three top voltage signals are sent into amplifier TL062 amplification respectively by being electrically connected, three amplifying signals are through being electrically connected 3 A/D ports sending into micro controller system PIC12C672, through A/D conversion becoming digital quantity, three digital quantities are launched through the emitting module that SAW oscillator NDR433A forms, two 3.6V button cell power supplies, centrifugal switch is connected on the feed circuit of power supply and projector, each tire signal adopts time division multiplex, receptor is installed in the operator's compartment, adopt Micrf011 demodulation device, digital signal after the demodulation is sent into microprocessor PIC16F873 and is handled, and send LED to show sound and light alarm.

2, a kind of automotive tire pressure temperature intelligent wireless alarm according to claim 1, it is characterized in that: described temperature, pressure detects and unlimited feedway (1) is fixed on the wheel hub (3) by a steel band (2), and holding screw (4) detects with temperature, pressure and unlimited feedway (1) is the installation of symmetry.

3, a kind of automotive tire pressure temperature intelligent wireless alarm according to claim 1 and 2 is characterized in that: receptor adopts Micrf011 demodulation device, and temperature sensor is that thermopile adopts the Japanese Ceramic production TS-1NMB of company.