CN201555951U

CN201555951U - Parking auxiliary system

Info

Publication number: CN201555951U
Application number: CN2009201814143U
Authority: CN
Inventors: 柯文河
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-11-20
Filing date: 2009-11-20
Publication date: 2010-08-18
Anticipated expiration: 2019-11-20

Abstract

The utility model provides a parking auxiliary system with high stability and low cost. The parking auxiliary system is provided with an ultrasonic ranging sensor, a transmission line, an alarming unit and a power supply module, wherein the sensor is provided with a power supply circuit, a communication circuit, a sending driving circuit, a piezoceramic transducer, a receiving amplifying circuit, an output driving circuit and a single chip. An input end of the power supply circuit is connected with the single chip, the communication circuit, the sending driving circuit, the receiving amplifying circuit and the output driving circuit; input and output ends of the communication circuit are connected with the input and output ends of the single chip; the output end of the sending driving circuit is connected with the piezoceramic transducer; the output end of the piezoceramic transducer is connected with the input end of the receiving amplifying circuit; the output end of the receiving amplifying circuit is connected with the single chip; one end of the output driving circuit is connected with the single chip while the other end is connected with the alarming unit; two ends of the transmission line are respectively connected with the ultrasonic ranging sensor and the power supply module; the alarming unit is provided with an audible alarm circuit and a distance display circuit; and the power supply module is provided with a voltage change-over circuit.

Description

A kind of parking assisting system

Technical field

The utility model relates to a kind of parking assisting system, especially relates to a kind ofly not establishing the radar for backing car main frame, adopting the host-free parking auxiliary system of ultrasonic ranging sensor (SENSOR) as the digital communication main body.

Background technology

In order to remind the vehicle drive personnel, generally by mode driver assistance personnel such as audible alarm or distance display, to reach the purpose of safe driving.Existing ultrasound wave parking assisting system generally is made up of sensor, main frame, audible alarm unit, distance display unit, power supply and automobile interface etc.Wherein require sensor to be laid in outside the vehicle body of automobile, for example on the bumper bar of front and back.Main frame then is located in the car.Because the sensor number of using is more, and relatively disperse, therefore transmission of the signal of sensor and main frame and power feed are very complicated, at present the technical scheme that adopts mainly contains direct connection, four-wire system, three-wire system and two-wire system, but the ubiquity system stability is relatively poor and cost than problems such as height.

Provide a kind of reversing radar of vehicle in the application for a patent for invention of publication number for CN1818714, comprise main control system, one or more probe, main frame comprises power supply stabilization circuit, in the main frame, center processor connects ultrasound emission circuit and ultrasonic receiving circuit, every road ultrasound emission circuit comprises the converter that transmits, the amplifier that transmits, with the emission superimposer that the A of transmission line end is connected, ultrasonic receiving circuit comprises electronic switch and Echo Processing circuit.Radar for backing car also comprises sensor module, it comprises the emission separation vessel and the stepup transformer that transmits, the B end of transmission line connects the emission separation vessel, and probe connects the stepup transformer that transmits, also comprise echo superimposer and echo frequency-selecting prime amplifier, ultrasonic receiving circuit comprises the echo separation circuit that is connected between transmission line A end and the electronic switch.

Publication number is the two-line three-state parking assistant system of CN101078766, relates to a kind ofly utilizing the location of ultrasonic reflections or having detection system.Provide a kind of contradiction that solves in the parking assisting system low-cost and high stability, the two-line three-state parking assistant system of the digital transmission design proposal of employing two-line three-state.Be provided with main frame, sensor and transmission line; Main frame is provided with sensor feed circuit, main frame radiating circuit, single-chip microcomputer, ternary level extraction circuit and Echo Processing circuit.Sensor is provided with power circuit, receiving and transmitting signal buffer circuit, emission driving circuit, piezoceramic transducer, reception amplifying circuit, digital signal change-over circuit and ternary signal driving circuit, and main frame is to the shared transmission line of the signal wire of communication between feed line, main frame and the sensor of sensor.

Summary of the invention

The purpose of this utility model is to provide a kind of stability higher, lower-cost parking assisting system.

The utility model is provided with ultrasonic ranging sensor, transmission line, alarm unit and power module.

The ultrasonic ranging sensor is used to send the order of emission ultrasound wave, to start the ultrasound wave of ultrasonic ranging sensor emission characteristic frequency, and handle the echo of ultrasonic ranging sensor, while is with other ultrasonic ranging sensor communications and require its action, the distance of coming the disturbance in judgement thing by single-chip microcomputer;

Described ultrasonic ranging sensor is provided with power circuit, communicating circuit, the emission driving circuit, piezoceramic transducer, receive amplifying circuit, output driving circuit and single-chip microcomputer, the input end of power circuit respectively with single-chip microcomputer, communicating circuit, the emission driving circuit, receive amplifying circuit, output driving circuit connects, the input end of power circuit is connected with automobile power source by signal wire, the I/O of communicating circuit is connected with the single-chip microcomputer input/output terminal, the output terminal of emission driving circuit is connected with piezoceramic transducer, the output termination of piezoceramic transducer receives the input end of amplifying circuit, the output terminal that receives amplifying circuit connects single-chip microcomputer, output driving circuit one termination single-chip microcomputer, other end unit taking alarm;

Described alarm unit is provided with audible alarm circuit and distance display circuit;

Described transmission line one end connects the ultrasonic ranging sensor, and the transmission line other end connects power module;

Described power module is provided with the voltage conversion circuit that is used for automobile power source is converted to the supply voltage of ultrasonic ranging sensor use.

The described while is connected with the shared lead of the signal wire of other ultrasonic ranging sensor communications.

The utility model adopts ultrasonic ranging sensor common source line and connection, do not establish the radar for backing car main frame, adopt the ultrasonic ranging sensor as the digital communication main body, be responsible for the communication and the computing of all ultrasonic ranging sensors, finish the parking radar systemic-function.

Compare with existing parking assisting system, the utlity model has following outstanding advantage:

1) controls the action of other ultrasonic ranging sensors with 1 ultrasonic ranging sensor, do not need to establish the main frame of traditional required usefulness of system.

2) owing to do not establish the main frame of traditional required usefulness of system, adopt a simple power supply processing module, therefore can reduce system cost significantly.

3) owing to do not need all ultrasonic ranging sensors all to be connected with main frame, an a usefulness wherein ultrasonic ranging sensor is connected with power module, has saved much with line, therefore can reduce system cost.

4) stable performance

Owing to all use the digital signal communication between ultrasonic ranging sensor and the ultrasonic ranging sensor, the reliability height, antijamming capability is strong, and signal amplification etc. handled in the ultrasonic ranging sensor, so stable height.

5) installation is more convenient.

This shows, the utility model has solved in the existing design proposal the relatively poor and cost of existing system stability than problems such as height, the shortcoming of interference free performance difference when having overcome the complicated and analog signal transmission of multiple-way system wire harness in the existing system solves the contradiction of low-cost and high stability in the parking assisting system.

Description of drawings

Fig. 1 is the circuit composition frame chart of the utility model embodiment.

Fig. 2 uses the example composition frame chart for the utility model embodiment adopts 3 ultrasonic ranging sensor strip bus communications.

Fig. 3 is the power module circuitry theory of constitution figure of the utility model embodiment.

Fig. 4 is the ultrasonic ranging sensor circuit theory of constitution figure of the utility model embodiment.

Embodiment

Following examples will be further described the utility model in conjunction with the accompanying drawings.

Referring to Fig. 1, the ultrasonic ranging sensors A is provided with power circuit 111, communicating circuit 112, single-chip microcomputer 113, emission driving circuit 114, output driving circuit 115, receives amplifying circuit 116 and piezoceramic transducer 117.Power circuit 111 provides the energy for sensor.The output terminal that single-chip microcomputer 113 output terminals 1 connect emission driving circuit 114 input ends, emission driving circuit 114 is connected with piezoceramic transducer 117.The output terminal of piezoceramic transducer 117 is connected with reception amplifying circuit 116 input ends, the output terminal that receives amplifying circuit 116 connects the input end 4 of single-chip microcomputer 113, single-chip microcomputer 113 output signal ends 2 connect communicating circuit, communicating circuit connects other ultrasonic ranging sensors 102 and carries out both-way communication, single-chip microcomputer 113 output signal ends 3 connect output driving circuit 115, and output driving circuit 115 output terminals connect alarm unit 103 (only main ultrasonic ranging sensor connects alarm unit).

Fig. 2 provides the utility model embodiment and adopts 4 ultrasonic ranging sensor strip bus communications to use the example composition frame chart.In Fig. 2, be provided with 4 ultrasonic ranging sensor SENSOR; OUTPUT end is output terminal, and the two other line is respectively power end and earth terminal, is connected with power module 111 and receives on the automobile power supply B (referring to Fig. 4).

Fig. 3 provides the power module circuitry theory of constitution figure of the utility model embodiment, Fig. 4 provides the ultrasonic ranging sensor circuit theory of constitution figure of the utility model embodiment, in Fig. 4, only provide a ultrasonic ranging sensor, other ultrasonic ranging sensor is similar.

In Fig. 3, diode D1, inductance L 1, capacitor C 01, C02, C03, C04, C05, C06, C07, resistance R 01, thermistor PI, voltage stabilizing chip U1 etc. form power circuit 101 power modules, for the ultrasonic ranging sensor provides the working point power supply.

In Fig. 4, inductance L 1, capacitor C 11, C12, C13, C14, C15, resistance R 11, thermistor P1, voltage stabilizing chip U3 etc. form power circuit 111 power modules, for the ultrasonic ranging sensor provides the energy.

Resistance R 12, R32, capacitor C 38, C21, C22, middle all T1, inductance L 2, triode Q11 etc. form emission driving circuit 114.

Amplifier U1, feedback resistance R27, R24 and peripheral circuit etc. form reception amplifying circuit 116.

Resistance R 14, R16, R8, R12, R18, triode Q2, voltage stabilizing diode Z1, capacitor C 33, C35 etc. form communicating circuit 112.

Resistance R 3, R19, R39, triode Q3, capacitor C 35 grades are formed output driving circuit 115.

System operating mode:

Main ultrasonic ranging sensor is controlled other ultrasonic ranging sensor 102 work successively by communicating circuit 112.When receiving main ultrasonic ranging sensor order, other ultrasonic ranging sensors 102 start working.Other ultrasonic ranging sensors 102 will receive the distance signal of barrier from the ultrasonic ranging sensor, be sent to main ultrasonic ranging sensor by communicating circuit 112.Main ultrasonic ranging sensor will receive barrier from the distance signal of ultrasonic ranging sensor and other ultrasonic ranging sensors 102 and handle from the distance signal of ultrasonic ranging sensor self receiving barrier, and, play the purpose that auxiliary security is driven by alarm unit 103 warning reminding human pilots.

The principle of work of ultrasonic ranging sensor is as follows:

Communicating circuit 112 is the mongline bidirectional communication.When sending data, the square-wave signal of single-chip microcomputer 113 output datas drives triode Q2 and sends data by connection; When receiving data, single-chip microcomputer 113 receives data by resistance R 18, R17, voltage stabilizing diode Z1 and capacitor C 33.When needs emission ultrasound wave, the square-wave signal of single-chip microcomputer output fixed frequency drives triode Q11.Triode Q11 conducting during single-chip microcomputer output high level, current collection is low level very; Triode Q11 ends during the single-chip microcomputer output low level, and current collection is high level very.The primary coil of charging and discharging currents by middle all transformers, this signal is through transformer rear drive ultrasonic ranging sensor emission ultrasound wave that boosts.

When driving piezoceramic transducer 117 received the ultrasound wave that reflects, piezoceramic transducer 117 produced faint electric signal, and this electric signal arrives single-chip microcomputer 113 through the reception amplifying circuit 116 amplification backs of U1 and peripheral circuit.Single-chip microcomputer 113 reflects the distance of hyperacoustic mistiming dyscalculia thing from the ultrasonic ranging sensor by judging the emission ultrasound wave and receiving.

Claims

1. a parking assisting system is characterized in that being provided with ultrasonic ranging sensor, transmission line, alarm unit and power module;

The ultrasonic ranging sensor is provided with power circuit, communicating circuit, the emission driving circuit, piezoceramic transducer, receive amplifying circuit, output driving circuit and single-chip microcomputer, the input end of power circuit respectively with single-chip microcomputer, communicating circuit, the emission driving circuit, receive amplifying circuit, output driving circuit connects, the input end of power circuit is connected with automobile power source by signal wire, the I/O of communicating circuit is connected with the single-chip microcomputer input/output terminal, the output terminal of emission driving circuit is connected with piezoceramic transducer, the output termination of piezoceramic transducer receives the input end of amplifying circuit, the output terminal that receives amplifying circuit connects single-chip microcomputer, output driving circuit one termination single-chip microcomputer, other end unit taking alarm;

2. a kind of parking assisting system as claimed in claim 1 is characterized in that the shared lead of the described while and the signal wire of other ultrasonic ranging sensor communications is connected.