CN201580310U - Ultrasonic driving safety reminder - Google Patents

Abstract

The utility model relates to an ultrasonic driving safety reminder, belonging to the technical field of traffic safety. The ultrasonic driving safety reminder is characterized in that: 1. an ultrasonic receiving-emitting head and horns of the driving safety reminder are respectively mounted at the position of a front baffle of an electromobile or other vehicles of 300 millimeters above and 1 meter below the ground; 2. pointers (3) of a speed meter of the electromobile is fixedly provided with a small light blocking plate (1); and 3. the left side of the 0-kilometer position on the surface of a dial (4) of the speed meter is fixedly provided with a photoelectric coupling sensor (2). The ultrasonic driving safety reminder solves the problem of driving safety of the electromobile, foot passengers and other vehicles; when foot passengers or vehicles are 90-degree right ahead of 3 meters during driving, the ultrasonic driving safety reminder automatically cues a driver and the foot passengers, thereby providing technical guarantee of driving safety for drivers of the electromobile, the foot passengers and other vehicles; and the ultrasonic driving safety reminder adopts the photoelectric control technique, and can close the entire detection and a voice warning system power supply when the speed per hour of the electromobile is less than 5 kilometers, thereby achieving the purposes of saving energy and reducing noise.

Description

Super sonic traffic safety reminiscences

Technical field: safety traffic.

Background technology: at present, people extremely pay close attention to safety traffic.Existing battery-driven car has been created greatly easily simultaneously going on a journey to people, because it adopts the particularity of power, its noiseless speed is controlled simply very popular soon.This advantage of the noiseless car of row also is its most fatal shortcoming.It, occurs suddenly under the situation without any defence pedestrian and other vehicle often.So not only cause dangerously, and cause a hidden trouble for the walking along the street safety of pedestrian and other vehicle to battery-driven car driving.

Summary of the invention: the technical problems to be solved in the utility model is: utilize the ultrasonic ranging Positioning Principle, in the preceding front apron position of battery-driven car, ultrasonic emitting and reception and speech prompting device are installed.When ultrasonic fault detection has obstacle in 3 meter 90 degree (6 meters of the maximum detectable ranges) scope of battery-driven car travel way the place ahead, send voice suggestion automatically, near reminding pedestrian and other vehicle, battery-driven car is arranged.Thereby can effectively avoid and reduce the generation of train operation accident.

The technical scheme that addresses this problem is: the ultrasonic ranging circuit that adopts existing LM1812 ultrasonic ranging special IC and NE555 astable circuit to constitute.Ultrasonic transmission/reception head and loudspeaker are installed on the battery-driven car front apron.When ultrasonic fault detection has obstacle in the 3 meter 90 degree scope in battery-driven car travel way the place ahead, the speech chip AC8020 that drives another monostable circuit NE555 control sends voice suggestion, and " battery-driven car please notes and " perhaps plays the built-in chant music of speech chip.Near reminding pedestrian and other vehicle, battery-driven car is arranged.Adopt the photoelectric control technology.During less than 5 kilometers, close whole detection system power supply in the speed per hour of battery-driven car.Thereby reach the purpose of energy savings and minimizing noise.

The circuit working principle: accompanying drawing is after system's energising, and the astable circuit that IC2NE555 constitutes is started working.Through resistance R 4, give IC1LM1812 the 8th pin square-wave pulse signal by IC2NE555 circuit 3 pin.When 8 pin were high level, IC1LM1812 was in sending mode; When 8 pin were low level, IC1LM1812 was in receiving mode.The transmitting-receiving conversion of IC1LM1812 is controlled by the IC2NE555 astable circuit.External L1, the C1 of IC1LM1812 the 1st pin determined the frequency of operation that circuit sends or receives, and this machine frequency of operation is 40kHz.When 8 pin of IC1LM1812 were high level, L1, C1 tank were switched to mode of oscillation, and oscillator signal by the 6 pin output of IC1LM1812, goes with the ejaculation of EFR-40Rsc ultrasonic transmission/reception hair after driving amplification.When 8 pin were low level, super sonic EFR-40Rsc transmitting-receiving head was converted to the reception head.The ultrasonic signal of receiving reflected back is imported by 4 pin through coupling capacitance C6, and the signal that takes out with the resonant tank by 1 pin after inner two-stage is amplified is delivered to detector together again.But because this moment, noise count was detected too, so will carry out filtering by the external R1 of 17 pin, C2.Through the integration time-delay, 16 pin and 14 pin become low level again.Again when the voltage on 1 pin become little to can not detection trigger device (less than 1.4V) time, integrator resets after delaying time.When IC1LM1812 is in sending mode, second stage amplifier automatic cutout; When switching tieback and receive pattern, second stage amplifier is not connected at once, but is being connected after through one section time-delay by 9 pin external capacitor C5 again.This time-delay makes receptor temporarily seal (detector is sealing simultaneously also), so just provides the time for the ultrasonic generator failure of oscillations.The size of 9 pin external capacitor C5 is relevant with delay time, and this machine is 2ms.The 14th pin of IC1LM1812 is through R2, C11, R7 output.Make the upset of IC3NE555 monostable circuit, the voice suggestion that drive IC 4AC8020 speech chip sends " battery-driven car please notes ".Perhaps play the built-in chant music of speech chip.Adjust the resistance of R1, can change the hypracoustic detection range.

Positive pole at power supply is connected to two voltage stabilizer IC5LM317 and IC6LA7808, and input end all is connected on positive 12 volts.IC6LA7808 is the voltage stabilizer that is used to supply with photoelectrical coupler [2] IC7ITR-20403 working power.IC5LM317 is the constant voltage power suspply that is controlled by photoelectrical coupler [2] IC7ITR-20403 control, and the IC5LM317 output voltage is adjusted into 10 volts, is used to survey the power supply with voice system.Apart from 10 millimeters places of needle point, be fixed with a little frequency modulated light sheet [1] at indicator [3] front end of the speed table advanced in years of battery-driven car.The left side at the 0 kilometer place that steps speed table dial plate [4] is fixed with photoelectricity coupling sensor [2] IC7ITR-20403.When the speed per hour of battery-driven car during less than 5 kilometers, the light path that little frequency modulated light sheet [1] is keeping off photoelectricity coupling sensor [2].Photoelectricity coupling sensor [2] is output not.Aerotron V1 is in the saturation conduction state, and the IC5LM317 output voltage is 1 volt, and when the speed per hour of battery-driven car during greater than 5 kilometers, little frequency modulated light sheet [1] leaves photoelectricity coupling sensor [2].Photoelectricity coupling sensor [2] is subjected to illumination drive aerotron V1 and enters off condition, and IC5LM317 starts working.Detection and voice system enter mode of operation.Because the maximum working voltage (MWV) of IC4AC8020 is 3.6 volts.So for it is provided with a voltage stabilizer IC8LM317, output voltage is adjusted into 3.5 volts specially.

Description of drawings: accompanying drawing 1 accompanying drawing is that the dial plate that photoelectricity electrical hookup sensor steps the speed table is housed; Fig. 2 is a super sonic traffic safety reminiscences detection system schematic circuit.

The specific embodiment: the ultrasonic transmission/reception head and the loudspeaker of traffic safety reminiscences are installed in battery-driven car or other vehicle front apron respectively apart from ground more than 300 millimeters in the altitude range below 1 meter.Ultrasonic fault detection and voice system surface-mounted integrated circuit are contained in the big lamp housing of battery-driven car or other need install the suitable position of reminiscences vehicle.On the pointer [3] of the numerical table advanced in years of battery-driven car, be fixed with a little frequency modulated light sheet [1].The left side at 0 kilometer place of the watch face [4] that steps numerical table is fixed with photoelectricity coupling sensor [2] IC7ITR-20403.When the speed per hour of battery-driven car during less than 5 kilometers, little frequency modulated light sheet [1] is keeping off photoelectricity coupling sensor [2].When the speed per hour of battery-driven car during greater than 5 kilometers, little frequency modulated light sheet [1] leaves photoelectricity coupling sensor [2].Detection and voice system are started working.Change light barrier length, can change the minimum prompting speed per hour of reminiscences.Lead-in wire [5] is the input-output line of photoelectricity coupling sensor [2].

Claims (1)

1. super sonic traffic safety reminiscences is characterized in that: 1, the ultrasonic transmission/reception head and the loudspeaker of traffic safety reminiscences are installed in battery-driven car or other vehicle front apron respectively apart from ground more than 300 millimeters in the scope below 1 meter; 2, on the pointer that the speed advanced in years of battery-driven car is shown [3], be fixed with a little frequency modulated light sheet [1]; 3, on the left side at the 0 kilometer place that steps speed table dial plate [4] face, be fixed with photoelectricity coupling sensor [2].

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