CN2321660Y - Vehicle speed color-changing outer indicator - Google Patents

Abstract

The utility model adopts a Doppler ultrasonic method to measure the speed, and an 8051 SCM is used as a speed measurement data processor. A multiple-color vehicle state display and a speed display are connected to a signal output opening of the SCM. The real-time measurement of the vehicle speed can be realized. The vehicle operation speed and the state can be displayed to the outside world. The trend of vehicle operation is seen clearly by the outside world. The speed measurement is accurate, and the installation is convenient and simple. The utility model can be arranged on any motor vehicles without refitting the vehicles. The driving safety is ensured, and the entire installation is simple and practical.

Description

The external speed state color changing display of vehicle

The utility model relates to the motor vehicle electronic instrument, the external progress status color changing display of particularly a kind of vehicle.

The external expression of existing vehicle running state only turns to and brakes, and does not have external display speed and speed state.And in the vehicle ', extraneous except that understand it turn to braking mode, understand its speed, information such as acceleration, deceleration also are very important, so just can grasp the movement tendency of vehicle, reduce contingent traffic accident.Existing vehicle is not owing to have external display speed and speed state; So some situation is not expressed.During as (1) abrupt deceleration vehicle, the car retardation degree can be soon, can be slow, vehicle can move, and also can be static, brake lamp only serves as warning, above-mentioned situation can not be reflected, and after abrupt deceleration vehicle is static, if take-off the brake, brake lamp extinguishes, and does not serve as warning on the contrary.Vehicle is not braked when (2) going up a slope, and the speed of a motor vehicle may reduce, and as braking, this moment, existing vehicle was not externally expressed, and made caution.When (3) reducing throttle or vehicle neutral or loosen the clutch, vehicle is also made decelerated movement, and vehicle is as slight braking, and existing vehicle also can't externally be expressed, and caution is extraneous or the like.Show that through looking into newly existing similar skill is asked at present can only express speed roughly, and can not express degree of choosing state.(acceleration, deceleration, constant speed, static etc.), and similar techniques all needs make corresponding transformation to the instrument system or the transmission system of vehicle.Different automobile types need be done different transformations, so they are difficult to promote.

The purpose of this utility model provides a kind of comformability by force and can externally show the telltale of car speed and state accurately and reliably.

The external speed state color changing display of described vehicle, comprise the unit that tests the speed, measurement data processing unit and display unit each several part, it is characterized in that: the signal input part of measurement data processing unit 3 links to each other with the signal output part of frequency mixer 2, the signal input part of frequency mixer 2 links to each other with the signal output part of the ultrasonic receiver 1 that tests the speed, its another road signal input part links to each other with the signal output part of frequency divider 7, this frequency divider signal output part links to each other with the signal input part of the ultrasonic transmitter 9 that tests the speed through actuator 8 simultaneously, and the signal input part of frequency divider 7 links to each other with the signal output part of crystal oscillator 6: the signal output part of measurement data processing unit 3 links to each other with the input end of velocity indicator 4 and status displays 5 respectively.

Described measurement data processing unit 3 adopts micro controller system to deal with device, be good with 8015 micro controller systems especially, at its P0.0-P0.7, P1.0-P0.7, be connected to the yellow light-emitting diode of making display driver with aerotron BG1-BG24 on the P2.0-P2.7 delivery port and make the speed telltale, at its P3.0, be connected on the P3.1 mouth with aerotron BG25, BG26 is that the redness and the green LED of display driver made status displays: the measured reflected ultrasonic wave of the ultrasonic receiver 1 of testing the speed is after the 2/4LM324 two stage amplifier amplifies, after comparator through constituting with 1/4LM324 compares shaping, send the data terminal of making frequency mixer 2 with d type flip flop 4013, another signal input part CL of frequency mixer is a clock end, and this clock end links to each other with the signal impulse mouth of frequency divider 7; The signal output part of frequency mixer 2 links to each other with micro controller system 8051 incoming signal ends.This incoming signal end is 8051 broken cord pin INT1.

The utility model adopts doppler ultrasound to test the speed, the micro controller system processing data, speed, the state that can show vehicle to external world, the movement tendency of outer bound pair vehicle is come into plain view, test the speed accurately, device is easy, need not can directly be loaded on place in operation on any power actuated vehicle to vehicle refitting, guarantee traffic safety.

Fig. 1 is that the utility model is implemented circuit diagram.

Fig. 2-1 is the A-A face cutaway view of the utility model speed state telltale birds-eye view.

Fig. 2-2 is the utility model speed state telltale birds-eye view.

Fig. 2-3 is the utility model speed state telltale left view.

Fig. 3 is the utility model functional-block diagram.

Fig. 4 is the utility model speed state telltale garden column embodiment master

Fig. 4-1 is the utility model speed state telltale garden column embodiment birds-eye view.

1 is the ultrasonic receiver that tests the speed among the figure, and 2 is frequency mixer, and 3 is the measurement data processing unit.4 is velocity indicator, 5 is status displays, and 6 is crystal oscillator, and 7 is frequency divider, 8 is actuator, 9 are the ultrasonic transmitter that tests the speed, and 5-1 is that green state shows lamp, and 5-2 is the red status display lamp, 4-1 is the speed display lamp, 10 for the place ahead shows lampshade, and 11 for the rear shows lampshade, and 12 is the telltale support.

Be described further below in conjunction with implementing 1 pair of principle of work of the present utility model of circuit diagram and working process.

Ultrasound emission and receiving transducer are placed the vehicle bottom, by connecting cable the speed signal that detects is passed to the measurement data that is contained on the vehicle body and handle and the display data unit.The speed display part is used for lighting corresponding light-emitting diode with display data, according to representing that speed divides the rank of retaining to divide according to the cost of product that can bear, the higher speed stepping of cost can be thin with one digit number for each grade speed, cost is low, and speed branch retaining can be thick.Speed display part luminotron is yellow.If it is 5 kilometers/hour one grade that supposition speed is divided retaining, can kilometer/hour locates to load onto red luminotron and represent scale every whole picking up, or only load onto red luminotron at the speed limit scale place of national regulation.(as 40 kilometers/hour of city speed limits.) the speed display part is shown to the external world with the speed of the speed of a motor vehicle by shelves according to display data.If 60 kilometers/hour of the speed of a motor vehicle, then 60 kilometers/hour following each grade luminotrons of shelves are bright entirely, form a speed threshold light beam, and are very eye-catching, if the speed of a motor vehicle is 5 kilometers/hour, then only bright this grade, like this, can very allow the external world understand the speed of vehicle intuitively.The speed state display part is by red luminotron and green luminotron representation speed state.The bright interval scale of red luminotron slows down.The bright interval scale of green luminotron quickens, and is red, green is bright together, becomes orange-yellow representative constant speed through the diffusion sheet colour mixture.When the stationary vehicle or the speed of a motor vehicle were lower than minimum stepping speed, red luminotron was bright, and expression stationary vehicle or intimate static is reminded extraneous attention.The speed state display part can be installed on the highest demonstration speed of a motor vehicle shelves end place.Whole display part (speed show and speed state show) can place roof, and Windshield place before and after the vehicle, and extraneous each side all can observe, (tailstock can only rear observe).By the IC4 frequency divider 5.12MHZ frequency of crystal oscillator is made 1/128 frequency division, obtain 40KHZ benchmark ultrasonic frequency, this signal amplifies through the BG27 rate of doing work, obtain enough emissive powers, do the impedance conversion by B1 again, obtain the benchmark ultrasonic emitting being gone out with the ultrasonic launching head impedance for matching.A ultrasonic signal that receives that receives is amplified through secondary by the amplifier that the 2/4LM324 amplifier constitutes.The signal that can obtain enough amplitudes is made comparisons for the comparator that is made of 1/4LM324, has obtained approximate CMOS level rectangular pulse signal thus.Constitute digital mixer by the IC2D binary pair.Benchmark ultrasonic frequency signal is connected to its clock end, and the impulse singla that receives is connected to its data terminal.Because the vehicle behaviour difference, the velocity variations of vehicle is reflected as the impulse rate difference that receives, and with reference frequency and the mixing of reception arteries and veins medium frequency, the difference frequency that obtains them thus is Doppler's shift frequency through IC2.Doppler frequency pulse by last gained is input to measurement data processing and the display data output of being made up of single chip microcomputer.Its input end is the external interrupt pin of single chip microcomputer.Each pulse causes microcomputer one interruption, and by the interrupt routine pulse count in the machine, the count value in certain time interval promptly reflects the speed of a motor vehicle of this moment.This speed of a motor vehicle count pulse number is compared with the standard speed of a motor vehicle count value in the program and can be drawn the speed of a motor vehicle of this moment.Program is advanced value with car at this moment and is converted into display data, sends to the I/O of single chip microcomputer mouth.Being arranged to 8051 single chip microcomputer I/O: 0-80 kilometer/hour per 5 kilometers/hour shelves herein, promptly by 5 kilometers/hour speed thresholds of P0.0 output, 10 kilometers/hour speed thresholds of P0.1 output, 15 kilometers/hour speed retainings of P0.2 output, P1.7 exports 80 kilometers/hour speed thresholds, P2.0-P2.7 is 90 kilometers/hour-160 kilometers/hour speed thresholds, the purpose of doing like this is just to cooperate 80051 I/O port, if select for use the many single chip microcomputers of I/O mouth also can be subdivided into 2.5 kilometers/hour one grade.Display data signal by single chip microcomputer output drives through the BG1-BG24 rate of doing work, lights each speed threshold light-emitting diode.The treating process that state display part is divided in the program is, the speed of a motor vehicle of current time is compared with the speed of a motor vehicle of previous moment, if the speed of a motor vehicle greater than previous moment, then make P3.0 output display data, light green luminotron, close the P3.1 display data simultaneously, if the speed of a motor vehicle less than previous moment, then make P3.1 output display data, point sends out a warning, and closes the P3.0 display data simultaneously, if equal the speed of a motor vehicle of previous moment, then P3.0, P3.1 export display data simultaneously, and red and green luminous pipe is lighted simultaneously, are orange-yellow through the scattering sheet colour mixture.Quicken, all have time-delay after the appropriate display to make that extraneous viewer is unlikely not to catch up with the demonstration result that high-speed sampling tests the speed during deceleration regime shows.Adopted 7805 regulator blocks can adapt to the vehicle of 6-12V.In the speed state telltale in order to make extraneous clearer and more definite light implication adopt the mode that light-emitting diode is arranged in arrow.Be arranged in the upwards arrow of indication at the middle part of telltale by green LED 5-1, represent acceleration mode.Be arranged in the arrow of downward indication at the middle part of telltale by red light emitting diodes 5-2, represent deceleration regime.During constant speed, two kinds of luminotrons are bright simultaneously, become their scattering colour mixtures orange-yellow by the rib in the lampshade.(purpose of doing so mainly is in order to reduce by one group of yellow light-emitting diode, also can to put one group of yellow light-emitting diode in addition).Orange-yellow part after the colour mixture is horizontal stripe generation

Claims (2)

1, the external speed state color changing display of a kind of vehicle comprises the unit that tests the speed.Measurement data processing unit and display unit each several part, it is characterized in that: the signal input part of measurement data processing unit (3) links to each other with the signal output part of frequency mixer (2), one signal input part of frequency mixer (2) links to each other with the signal output part of the ultrasonic receiver that tests the speed (1), its another road signal input part links to each other with the signal output part of frequency divider (7), this frequency divider signal output part simultaneously through actuator (8) and with the ultrasonic transmitter that tests the speed (9)) signal input part link to each other, the signal input part of frequency divider (7) links to each other with the signal output part of crystal oscillator (6); The signal output part of measurement data processing unit (3) links to each other with the input end of velocity indicator (4) and status displays (5) respectively.

2, the external speed state color changing display of vehicle as claimed in claim 1, it is characterized in that: described measurement data processing unit (3) adopts micro controller system to deal with device, be good with 8051 micro controller systems especially, on its P0.0 one P0.7, P1.0-1.7, P2.0-P2,7 delivery ports, be connected to the yellow light-emitting diode of making display driver with aerotron BG1-BG24 and make the speed telltale, on its P3.0.P3.1 mouth, be connected to aerotron BG25, BG26 be the red of display driver and and green LED make shape utmost point telltale; The measured reflected ultrasonic wave of the ultrasonic receiver (1) that tests the speed is after 2/4,1M4,324 two and amplifier amplify, after comparator through constituting with 1/4LM324 compares shaping, send the data terminal of doing frequency mixer (2) with d type flip flop 4013, another signal input part CL of frequency mixer is a clock end, and this clock end links to each other with the signal impulse mouth of frequency divider (7); The signal output part of frequency mixer (2) links to each other with micro controller system 8015 incoming signal ends, and this incoming signal end is 8015 broken cord pin INT1.

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