CN203381621U - Intelligent vehicle speed control system - Google Patents
Intelligent vehicle speed control system Download PDFInfo
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- CN203381621U CN203381621U CN201320361518.9U CN201320361518U CN203381621U CN 203381621 U CN203381621 U CN 203381621U CN 201320361518 U CN201320361518 U CN 201320361518U CN 203381621 U CN203381621 U CN 203381621U
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Abstract
The utility model discloses an intelligent vehicle speed control system comprising an ultrasonic sensor and an infrared sensor which are respectively connected with an analog input circuit. The analog input circuit is connected with an SCM (single-chip microcomputer) respectively connecting with a drive circuit, a voltage stabilizing circuit, a display module and an alarming module, and the drive circuit is connected with a motor. The system is capable of realizing intelligent speed control when a driver can not react immediately to a close vehicle. With the ultrasonic sensor to measure, the SCM calculates data and outputs PWM (pulse-width modulation) waves, and with a motor drive circuit to control the speed of the motor, a series of operation like deceleration and braking is realized. Furthermore, the intelligent vehicle speed control system has the advantages of being high in measurement accuracy, fast in data processing speed, good in anti-interference ability and capable of controlling the speed of different kinds of vehicles taking an electric motor as a power source in different environments.
Description
Technical field
The utility model relates to a kind of automobile speed intelligent control system, particularly a kind of automobile speed Based Intelligent Control of controlling based on Freescale MC9s12xs128 series monolithic.
Background technology
Electrical motor is a kind of a kind of efficient electric elements that convert electrical energy into kinetic energy.Electrical motor is arranged on automobile, as the power driven element, many advantages is arranged: use that electronics package is convenient to control, energy conversion efficiency is high, be convenient to disassembling, assembling and replacing, reliability is high, safety good, environment friendly and pollution-free anti-seismic performance strong, long service life etc.Therefore, in the automobile application, by the heat energy of fuel combustion, to the transition of electric energy technology, will greatly reduce energy resource consumption.At present, automobile has goed deep into family, and the safety traffic of automobile is related to the stable of each family's wellbeing and country; But collision and rear crash event happen occasionally, and mis-accelerator pressing replaces brake to cause the tragedy event of car crash again and again to occur under desperation.For the dynamic property, economy, the feature of environmental protection, safety, road-holding property, the traveling comfort that improve automobile, various safety devices arise at the historic moment, and make the driver behavior of automobile become simpler and easy reliable, take more comfortable safety.On automobile, safety measure has safety strap at present, safety air bag etc., and there is following problems in these devices: safety air bag not only cost is higher, and it is large to take up room, and most importantly safety factor is not high, after having an accident, still can cause a certain amount of economic loss.
Therefore, along with the particularly development of micro controller system of Eltec, can make the automobile trend more intelligent.
The utility model content
The purpose of this utility model is to provide a kind of automobile speed intelligent control system, and this control system can the technical solution problem, can make automobile speed realize intelligent control, good reliability in the certain distance scope.
The purpose of this utility model realizes by following technical proposals.
A kind of automobile speed intelligent control system, comprise ultrasonic transduter and infrared pickoff, described ultrasonic transduter is connected with analog input circuit respectively with infrared pickoff, analog input circuit is connected with micro controller system, and micro controller system connects respectively driving circuit, mu balanced circuit, display module and alarm module; Described driving circuit connects motor.
Further, described micro controller system is connected with infrared pickoff with ultrasonic transduter respectively.
Further, described micro controller system adopts the mc9s12sx128 micro controller system.
Further, described mu balanced circuit comprises socket, and socket connects switch, and switch pin 3 connects respectively the pin one of chip LM2940 and LM7805, switch pin 4 string one light-emitting diode D1 and resistance R D ground connection; LM7805 pin two ground connection, LM7805 pin 3 connects output load, and the LM7805 pin one is by capacitor C 4 ground connection, and LM7805 pin 3 is by chemical capacitor C44 ground connection; LM2940 pin two ground connection, LM2940 pin 3 connects output load, and LM2940 pin one and pin 3 are respectively by capacitor C 2 and chemical capacitor C22 ground connection.
Further, described driving circuit comprises two BTS7960B chips that are connected in parallel, and wherein the PWM1 of every BTS7960B chip, PWM2 connect respectively micro controller system; IN1, IN2 in two BTS7960B chips connect respectively power supply.
Further, the PWM1 of described each BTS7960B chip, PWM2 and IN1, IN2 access respectively the pin of BTS7970 control chip by resistance.
Further, described BTS7970 control chip by the access resistance after ground connection.
Further, the OUT1 of described BTS7970 control chip, OUT2 connect respectively the two ends of motor; Ground connection after pin 7 meets power line voltage VCC7 and passes through access electric capacity.
The beneficial effects of the utility model are:
1) selection of each element, adopt the supersonic sensing device to carry out data acquisition, selects the infra-ray sensing device to carry out speed feedback control, greatly reduces power consumption.The selection of some resistance capacitances is also all followed the reduction power consumption and is selected.
2) select two motor drive ic BTS7970 to form the H full bridge driving circuit; make with the interface of microcontroller and become very easy in the inner integrated drive IC of BTS7970, and there is the function of logic level input, current detecting diagnosis, slope correction, Dead Time generation and excess temperature, overvoltage, under-voltage, overcurrent and short-circuit protection.Two BTS7970 can be connected and composed the H full-bridge.The representative value of BTS7970 on state resistance is 16m Ω, and drive current can reach 43A.The acceleration-deceleration of motor can recently be realized by the duty of unidirectional adjusting PWM ripple.But, in the situation that more complicated, the reversing braking that motor need to carry out voltage reversal could realize slowing down.
3) special purpose device comprises ultrasonic transduter Acquisition Circuit, mu balanced circuit, kernel control chip, liquid crystal display circuit, motor-drive circuit etc., core controller is processed gathering the signal of returning by software, the PWM ripple is controlled in output, to control motor speed.Mu balanced circuit is first realized voltage stabilizing through LM2940 and LM7805 chip, and making change of voltage is 5V, supplies with other circuit modules, makes the modules normal operation.Micro controller system is first controlled super sonic and is sent signal, the data that docking is got back are again carried out procedure treatment and are calculated the information such as speed, distance, export again the PWM ripple of corresponding speed, control motor-drive circuit, control motor speed, infrared pickoff is transferred to micro controller system by self vehicle speed signal of gather, and forms closed loop control.
This automobile speed intelligent control system can actv. reduces collides and the generation of rear-end collision, safety and stability, the saving energy, with low cost, and future develop is good.
The accompanying drawing explanation
Fig. 1 is the utility model system architecture diagram.
Fig. 2 is chip controlling circuit of voltage regulation figure.
Fig. 3 is motor-drive circuit figure.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is described in further details.
As shown in Figure 1, a kind of automobile speed intelligent control system, comprise ultrasonic transduter 1 and infrared pickoff 2, described ultrasonic transduter 1 is connected with analog input circuit 3 respectively with infrared pickoff 2, analog input circuit 3 is connected with micro controller system 4, and micro controller system 4 connects respectively driving circuit 5, mu balanced circuit 9, display module 7 and alarm module 8; Described driving circuit 5 connects motor 6.
The utility model sends respectively ultrasonic signal by micro controller system 4 and infrared signal is carried out information acquisition to ultrasonic transduter 1 and infrared pickoff 2, when ultrasonic transduter 1 collects the speed signal of the adjacent automobile in the place ahead, by gathering the signal of returning, be input in mc9s12sx128 micro controller system 4, the signal of returning through 4 pairs of collections of micro controller system is processed, act on the driving circuit 5 of motor, directly control the speed of motor 6 through the debugging of overdrive circuit 5.Infrared pickoff 2 uses as a kind of closed loop feedback, and infrared pickoff 2 gathers the range signal of the adjacent automobile in the place ahead.When ultrasonic transduter and infrared pickoff all collect signal, comprehensively regulate the PWM of micro controller system 4, change dutycycle, thereby control motor, speed that also just can pulsation-free control car.
The rotating speed of motor is relevant with the dutycycle of the PWM waveform of input motor-drive circuit, and dutycycle is larger, and motor speed is higher.Two motors are generally arranged in common automobile, and one as back-wheel drive, one is carried out use as front-wheel steering, can be controlled respectively by two-way PWM.Can carry out regulation speed by two kinds of modes of Open loop and closed loop in control process, a dynamic data that only needs to detect the automobile be adjacent is controlled in open loop, directly controls the speed of self automobile, and circuit is simple, controls easily.But when the speed of a motor vehicle is larger, buckles is larger, and control accuracy is lower; Closed loop control is the installation rate detecting device in vehicle, measure the speed of a motor vehicle of self, feed back to micro controller system, be used for controlling the actual speed of a motor vehicle, so not only can control accurately the relative velocity of vehicle and adjacent vehicle, the speed of a motor vehicle that can also accurately control self prevents from driving over the speed limit, and greatly reduces the design risk, has improved its practical application.
In this system, ultrasonic transduter can be measured larger distance, and survey precision is high, and metering circuit is simple.It is wide that the micro controller system central control circuit has the service contamination scope, fast operation, circuit level is high, and it has abundant I/O interface, communication is arranged, timer, counting machine and interrupt processing capacity greatly facilitate program design and debugging, and output multi-channel PWM ripple, control the multichannel motor simultaneously and work simultaneously simultaneously; Motor-drive circuit adopts integrated driving chip, and circuit connecting is simple, and good stability can adapt to the pulse duration modulation ratio of different frequency.This device also can be realized position probing and control action.
Meanwhile, we have also designed voltage stabilizing circuit module, have reduced the interference that micro controller system is subject to other signal, guarantee the stable work of micro controller system.Speed of a motor vehicle when display module can accurately show the distance of the car of operation and the place ahead car and operation.When the distance between two cars exceed safety distance the time, the warning of just sounding of the buzzer phone in alarm module, actv. has reduced the generation of traffic accident, reaches the purpose of automobile speed Based Intelligent Control.
Below provide respectively the effect that mu balanced circuit figure and motor-drive circuit figure further illustrate native system.
As shown in Figure 2, be chip mu balanced circuit figure of the present utility model.
In figure, power supply is first through the socket incircuit, the pin two ground connection of socket, the socket pin one connects the pin two of switch, the pin 3 of switch connects respectively the pin one of chip LM2940 and LM7805, and the pin 4 of switch also connected a light-emitting diode D1 and a resistance R D ground connection, as a power light; The pin two ground connection of LM7805, the pin 3 of LM7805 connects output load, and wherein the pin one of LM7805 is by capacitor C 4 ground connection, and the pin 3 of LM7805 is by chemical capacitor C44 ground connection, and the effect of electric capacity is voltage stabilizing and filtering; The pin two ground connection of LM2940, the pin 3 of LM2940 connects output load, and wherein the pin one of LM2940 and pin 3, respectively by capacitor C 2 and chemical capacitor C22 ground connection, play voltage stabilizing and filter action.
As shown in Figure 3, in motor-drive circuit, BTS7960B has two, is the control chip of motor, and wherein the PWM1 of every BTS7960B chip, PWM2 connect respectively P2 and the P4 pin of micro controller system; The IN1 of each BTS7960B chip, IN2 connect the 5v power supply.
The PWM1 of first BTS7960B chip, IN1 and PWM2 are respectively by pin 3, pin two and the pin 6 of resistance R 12, R13, R14 access BTS7970 control chip, and pin 5 is by resistance R 16 ground connection.Pin 7 meets power line voltage VCC7 and, by capacitor C 13 ground connection, OUT1, OUT2 connect respectively the two ends of motor; Pin one ground connection.
Second BTS7960B chip PWM1, IN2 and PWM2 are respectively by pin 3, pin two and the pin 6 of resistance R 18, R21, R22 access BTS7970 control chip, and pin 5 is by resistance R 24 ground connection.Pin 7 access power line voltage VCC7 also pass through capacitor C 17 ground connection, and OUT1, OUT2 connect respectively the two ends of motor; Pin one ground connection.Electric capacity in circuit plays voltage regulation filtering; Resistance plays current limliting.The feature of its driving circuit is as follows:
1) with micro controller system 5V isolation, effectively protect micro controller system;
2) motor driver output terminal voltage shows;
3) isolating chip 5V power supply (can with one-chip machine common 5V);
4) can weld radiating gill;
5) High-current output, maximum supply current can reach 43A;
6) micro controller system gets final product (GND, 5V, PWM1, PWM2) with 4 with line to driver module;
7) maximum frequency is supported 15KHz, and over causing, chip is hot, the motor rotation mal;
8) plank wiring standard, overcurrent capability is strong;
Embodiment of the present utility model is to signal by ultrasonic transduter 1 information acquisition, then the signal collected is transported in kernel processor chip micro controller system 4, pass through processing and the calculating of kernel processor chip MC9S12XS128 to information, control the speed of motor 6; Whether this system is battery-powered by the 7.2V direct current (DC), and wherein battery connects power light, and work by the power light decision circuitry; For stable 5V voltage is provided to core processor, we adopt LM2940 to carry out voltage stabilizing, the function such as it is little that LM2940 has power consumption, and circuit is simple, efficiency is high; In the time that the distance between two cars exceeds safety distance, just by buzzer warning, remind the driver to note front vehicles; And the distance between front vehicles is how much can on Liquid Crystal Display, show accurately on earth; Control motor by the feedback integration of BTS7960B and infrared pickoff, two BTS7960B form three driving circuits of full-bridge, have excess temperature, overvoltage, under-voltage, overcurrent and short-circuit protection function.
The above; it is only the preferably specific embodiment of the utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement, within all should being encompassed in protection domain of the present utility model.
Claims (6)
1. an automobile speed intelligent control system, it is characterized in that, comprise ultrasonic transduter and infrared pickoff, described ultrasonic transduter is connected with analog input circuit respectively with infrared pickoff, analog input circuit is connected with micro controller system, and micro controller system connects respectively driving circuit, mu balanced circuit, display module and alarm module; Described driving circuit connects motor;
Described micro controller system adopts the mc9s12sx128 micro controller system;
Described mu balanced circuit comprises socket, and socket connects switch, and switch pin 3 connects respectively the pin one of chip LM2940 and LM7805, switch pin 4 string one light-emitting diode D1 and resistance R D ground connection; LM7805 pin two ground connection, LM7805 pin 3 connects output load, and the LM7805 pin one is by capacitor C 4 ground connection, and LM7805 pin 3 is by chemical capacitor C44 ground connection; LM2940 pin two ground connection, LM2940 pin 3 connects output load, and LM2940 pin one and pin 3 are respectively by capacitor C 2 and chemical capacitor C22 ground connection.
2. automobile speed intelligent control system according to claim 1, is characterized in that, described micro controller system (4) is connected with infrared pickoff with ultrasonic transduter respectively.
3. automobile speed intelligent control system according to claim 1, is characterized in that, described driving circuit comprises two BTS7960B chips that are connected in parallel, and wherein the PWM1 of every BTS7960B chip, PWM2 connect respectively micro controller system; IN1, IN2 in two BTS7960B chips connect respectively power supply.
4. automobile speed intelligent control system according to claim 3, is characterized in that, the PWM1 of described each BTS7960B chip, PWM2 and IN1, IN2 access respectively the pin of BTS7970 control chip by resistance.
5. automobile speed intelligent control system according to claim 3, is characterized in that, described BTS7970 control chip by the access resistance after ground connection.
6. automobile speed intelligent control system according to claim 3, is characterized in that, the OUT1 of described BTS7970 control chip, OUT2 connect respectively the two ends of motor; Ground connection after pin 7 meets power line voltage VCC7 and passes through access electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320361518.9U CN203381621U (en) | 2013-06-21 | 2013-06-21 | Intelligent vehicle speed control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320361518.9U CN203381621U (en) | 2013-06-21 | 2013-06-21 | Intelligent vehicle speed control system |
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| CN203381621U true CN203381621U (en) | 2014-01-08 |
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| CN201320361518.9U Expired - Fee Related CN203381621U (en) | 2013-06-21 | 2013-06-21 | Intelligent vehicle speed control system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009678A (en) * | 2014-05-21 | 2014-08-27 | 芜湖蓝宙电子科技有限公司 | Double-motor control module circuit |
| CN105711593A (en) * | 2014-12-18 | 2016-06-29 | 丰田自动车株式会社 | Driving assistance apparatus |
| CN110073241A (en) * | 2016-12-14 | 2019-07-30 | 罗伯特·博世有限公司 | Method for running ultrasonic sensor |
| CN111284451A (en) * | 2020-02-28 | 2020-06-16 | 西安文理学院 | Synchronous control circuit, windshield wiper system and control method of system |
-
2013
- 2013-06-21 CN CN201320361518.9U patent/CN203381621U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009678A (en) * | 2014-05-21 | 2014-08-27 | 芜湖蓝宙电子科技有限公司 | Double-motor control module circuit |
| CN105711593A (en) * | 2014-12-18 | 2016-06-29 | 丰田自动车株式会社 | Driving assistance apparatus |
| CN105711593B (en) * | 2014-12-18 | 2018-03-23 | 丰田自动车株式会社 | Driving ancillary equipment |
| CN110073241A (en) * | 2016-12-14 | 2019-07-30 | 罗伯特·博世有限公司 | Method for running ultrasonic sensor |
| CN110073241B (en) * | 2016-12-14 | 2023-08-08 | 罗伯特·博世有限公司 | Method for operating an ultrasonic sensor |
| CN111284451A (en) * | 2020-02-28 | 2020-06-16 | 西安文理学院 | Synchronous control circuit, windshield wiper system and control method of system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140108 Termination date: 20140621 |
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| EXPY | Termination of patent right or utility model |