A kind of novel on-vehicle reversing police radar device
Technical field
The utility model relates to electronic technology and automobile technical field.
Background technology
Along with socioeconomic development, transportation is day by day prosperous, and the quantity of automobile rises first mate.Congested traffic condition is also on the rise, collision event occurs repeatedly, cause inevitable personal injury and economic loss, for this situation, a kind of response of design is fast, reliability is high and automobile anti-collision alarm system that is comparatively economy is imperative, ultrasonic ranging method is a kind of modal distance ranging method, be applied to the closely crashproof of parking of automobile all around, low speed situations, and in reversing automobile anti-collision alarm system, ultrasound wave is as a kind of special sound wave, namely ultrasonic ranging is utilize its reflection characteristic, when vehicle rollback, ultrasonic distance sensor utilizes the Obstacle Position of ultrasound examination rear view of vehicle, and utilize pilot lamp and hummer vehicle to the distance of barrier and position informing human pilot, accomplish to remind human pilot to play the effect of safeguard protection in time.
Utility model content
Technical purpose of the present utility model is for providing a kind of safe and reliable novel on-vehicle reversing police radar device.Technical scheme disclosed in the utility model is:
A kind of novel on-vehicle reversing police radar device, it is characterized in that, the serial communication circuit, clock and the reset circuit that comprise single-chip microcomputer and be connected respectively with single-chip microcomputer, sound light alarming circuit, voice module circuit, LCD MODULE circuit and ultrasonic transceiver module circuit; Described sound light alarming circuit comprises hummer and multiple light emitting diode; Described voice module circuit comprises the recoding unit being provided with Mike and the playback unit being provided with loudspeaker; Described ultrasonic transceiver module circuit comprises many group ultrasonic transmission/reception probes, is separately positioned on hull back arranged on left and right sides and hull back trailing flank.
Further technical scheme also comprises:
As preferably, described single-chip microcomputer adopts MSP430F149 single-chip microcomputer; Described voice module is for core possesses the module of recording/playing function with ISD4004 speech chip; Described ultrasonic transceiver module is the HC-SR04 module that ultrasonic transmission/reception separates; Described LCD MODULE is LCM12864 Liquid Crystal Module; Described serial communication circuit is provided with jtag interface.
Described voice module circuit is provided with ISD4004 speech chip and LM386 power amplifier, be connected with the 5th pin of LM386 after the AUDIO OUT terminal of described ISD4004 speech chip and capacitor C7, slide rheostat R8, resistance R10, electric capacity C9 are in sequential series, the sliding contact of described slide rheostat R8 is connected with the 3rd pin of LM386 power amplifier, and resistance R7 is connected in parallel on the both sides of capacitor C7 and slide rheostat; First pin of LM386 power amplifier is connected on the 8th pin of LM386 power amplifier after connecting with electric capacity C8, resistance R9; The electric capacity C11 of ground connection is connected on the connecting line of LM386 power amplifier the 6th between pin and power supply.
Described sound light alarming circuit comprises resistance R10 and the PNP type triode of series connection, and described resistance R10 is connected with single-chip microcomputer pin, and described PNP type triode is connected with hummer.
In described LCD MODULE circuit, the side fixed contact ground connection of one slide resistor R4, opposite side fixed contact connects power supply, its sliding contact is connected with the 3rd pin of LCM12864 control chip, and the 15 pin of LCM12864 control chip, the 17 pin are connected on the line between slide resistor R4 and power supply.
The utility model combines can the conventional alarm device such as voice module and hummer of recording playback, makes it to act synergistically, plays better alarming effect.By further circuit design and select suitable control chip, make the utility model control system have better stability, sensitivity, and by lower power consumption, control cost, be applicable to being arranged on all kinds of automobile, there is good cost performance.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the utility model apparatus control system;
Fig. 2 is the installation site schematic diagram of the utility model device on car body;
Fig. 3 is the utility model apparatus control program process flow diagram;
Fig. 4 is the ultrasonic transceiver module circuit diagram of the utility model device;
Fig. 5 is the LCD MODULE circuit diagram of the utility model device;
Fig. 6 is the sound light alarming circuit figure of the utility model device;
Fig. 7 is the voice module circuit diagram of the utility model device.
Embodiment
In order to better illustrate the technical solution of the utility model, below in conjunction with accompanying drawing and specific embodiment, the utility model is described further.
An embodiment as shown in Figure 1, a kind of novel on-vehicle reversing police radar device, comprises power driving circuit, single-chip microcomputer and the serial communication circuit, clock and the reset circuit that are connected respectively with single-chip microcomputer, sound light alarming circuit, voice module circuit, LCD MODULE circuit, ultrasonic transceiver module circuit etc.
Described sound light alarming circuit comprises hummer and four light emitting diodes.Described voice module circuit comprises the recoding unit being provided with Mike's (microphone) and the playback unit being provided with loudspeaker.Described ultrasonic transceiver module circuit comprises five groups of ultrasonic transmission/reception probes, wherein, as shown in Figure 2, two groups are arranged on hull back arranged on left and right sides, other three groups are arranged on hull back trailing flank, make it the scope need monitored when fully covering reversing, reduce monitoring blind area.
In above-described embodiment, described single-chip microcomputer preferably adopts MSP430F149 control chip.Described voice module is that voice module circuit is made up of ISD4004 chip and peripheral circuit with speech chip ISD4004 for core possesses the module of recording/playing function.Described ultrasonic transceiver module is the HC-SR04 module that ultrasonic transmission/reception separates, and ultrasonic transceiver module circuit is made up of HC-SR04 and peripheral circuit.Described LCD MODULE is LCM12864 Liquid Crystal Module, and LCD MODULE is made up of LCM12864 chip and corresponding peripheral circuit.Described serial communication circuit is made up of jtag interface and corresponding peripheral circuit.
In five ultrasonic transceiver module circuit as shown in Figure 4, second pin (Trig) of HC-SR04 chip is connected with single-chip microcomputer pin P5.1, and resistance one end of a 10K connects power supply, and the other end is connected on the extension line of the second pin (Trig); 3rd pin (Echo) of HC-SR04 chip is connected with single-chip microcomputer pin P1.4, and resistance one end of a 10K connects power supply, and the other end is connected on the extension line of the 3rd pin (Echo).
In LCD MODULE circuit as shown in Figure 5, the side fixed contact ground connection of one slide resistor R4, opposite side fixed contact connects power supply, its sliding contact is connected with the 3rd pin (V0) of LCM12864 control chip, and the 15 pin (PSB) of LCM12864 control chip, the 17 pin (RST) are connected on the line between slide resistor R4 and power supply (VCC).
As shown in Figure 6, described sound light alarming circuit comprises resistance R10 and the PNP type triode of series connection, and described resistance R10 is connected with single-chip microcomputer pin P6.7, and described PNP type triode is connected with hummer.
As shown in Figure 7, described voice module circuit is provided with LM386 power amplifier, be connected with the 5th pin (output) of LM386 after the AUDIO OUT terminal of described ISD4004 speech chip and capacitor C7, slide rheostat R8, resistance R10, electric capacity C9 are in sequential series, the sliding contact of described slide rheostat R8 is connected with the 3rd pin (forward inputs) of LM386 power amplifier, and resistance R7 is connected in parallel on the both sides of capacitor C7 and slide rheostat; First pin (gain setting) of LM386 power amplifier is connected on the 8th pin (gain setting) of LM386 power amplifier after connecting with electric capacity C8, resistance R9; The electric capacity C11(of ground connection has polarity) be connected between LM386 power amplifier the 6th pin (power supply) and power supply connecting line on.Resistance R7 and be also provided with a ground wire between slide rheostat R8 and circuit R10.
During the work of the utility model device, generally, start report to the police and light green LED when the distance that ultrasonic probe detects is less than or equal to hummer when 55cm is greater than 30cm; When the distance that ultrasonic probe measures is less than or equal to buzzer warning when 30cm is greater than 15cm, and green and red light emitting diodes are all lighted; When ultrasound to distance be less than or equal to 15cm time buzzer warning, all light emitting diodes are all lit, carry out voice message by voice module simultaneously, in whole reversing process, LCD MODULE all can show current state in real time, and hummer pipes with three kinds of different frequencies.Alarm distance user can be arranged according to the situation of oneself further, then the utility model device need arrange necessary operation push-button, for the input of instruction.User is when moveing backward, also can simultaneously by the monitoring distance of each sensor probe collection of voice module real-time broadcasting, or utilize the recording and reproducing function of voice module, the sound oneself liked alternately acts synergistically as prompt tone and hummer, and its program circuit is see Fig. 3.
More than show and describe ultimate principle of the present utility model, principal character and advantage of the present utility model.The technician of the industry should understand, the utility model is not restricted to the described embodiments, what describe in above-described embodiment and instructions just illustrates principle of the present utility model, and under the prerequisite not departing from the utility model spirit and scope, the utility model also has various changes and modifications.The claimed scope of the utility model is defined by appending claims, instructions and equivalent thereof.