CN2500558Y

CN2500558Y - Electric appliance sub for automobile

Info

Publication number: CN2500558Y
Application number: CN 01247284
Authority: CN
Inventors: 童明健; 张芦苇; 姚文泽; 周永才
Original assignee: XINKUN AUTO-CONTROL EQUIPMENT Co Ltd CHONGQING CITY
Current assignee: XINKUN AUTO-CONTROL EQUIPMENT Co Ltd CHONGQING CITY
Priority date: 2001-08-13
Filing date: 2001-08-13
Publication date: 2002-07-17
Anticipated expiration: 2011-08-13

Abstract

A vehicle electrical bus comprises a master controller (2), an input/output interface circuit, a plurality of load allocation controller (9), and a vehicle combined switch (5). The vehicle electrical bus is characterized in that the master controller comprises a CPU, a transmitting circuit and a receiving circuit; the load allocation controller comprises a transmitting circuit, a receiving circuit and an output driving circuit, wherein the output and the input terminals of the transmitting and the receiving circuits are independently connected with the master controller by the input/output interface circuit; the control signal of the vehicle combined switch is connected orderly with a decoupled filter circuit, an optical isolation circuit and an interface circuit of the input/output interface circuit and then connected with a data bus of the master controller. The utility model only use two two-way communication lines and one power line to replace hundreds of wire bundles for the point-to-point connection in the prior art, simplifies the fabrication, installation and maintenance of low-voltage electrical wires of vehicles, and has high standardization and good versatility and reliability.

Description

Automobile electric bus

(1), technical field

The utility model relates to the automobile electric bus that is specifically designed to the wiring of automobile low-voltage electrical.

(2), background technology

What automobile of the prior art adopted is point-to-point wire structures, promptly be distributed in automobile low voltage electrical equipment (light fixture everywhere, fan, windscreen wiper, air-conditioning etc.) must control at the operator's compartment centralized operation, each load all has two lines, want to become wire harness to install again wire producing earlier, be into hundred a bundle altogether, except that consuming a large amount of copper cash, make, install, check, change, maintenance is all extremely inconvenient, production efficiency is very low, also there is potential safety hazard: because lead is easily because of vibration and extruding, wear and tear and broken line, reasons such as broken string, cause the positive power line shorted to earth, cause " burning car " accident,, whole wire harness more be changed in case the maintenance after the accident occurs, cause very big waste, be difficult to ensure the needs of automotive safety operation.In addition, the defective that also exists function to fall behind, promptly each instrument is uncorrelated mutually, can not exchange message, sharing resources.The mechanical type car speed mileage table is connected with driving engine by flexible axle, damages easily.Setting, demonstration and the storage, the memory function that do not have complete multiple information do not have the storing memory function of the speed of a motor vehicle just can not provide objective scientific basis for handling traffic accident yet.

(3), summary of the invention

Technical problem to be solved in the utility model is: the automobile bus that adopts with CPU the compositions such as master controller, several load distribution controllers, display key plate and car speed sensor that are core, with the volume of pulse duration modulation/translate (E/D) sign indicating number, multiplex techniques, realization is to the control of the various low voltage electrical equipments of automobile, and have after setting, demonstration and storage, memory, the parking of speed, mileage, time by second show stop before functions such as the speed of a motor vehicle and driver behavior state in the 15min, thereby replace the intelligent electric equipment of point-to-point mode low pressure wire harness.Wherein between master controller and load distribution controller only with transmission with receive two connection bi-directional transmission of information, the information that transmits comprises address code and numeric data code two parts, have only the load distribution controller of calling out (address code) just to respond and receive information data, and control corresponding electrical equipment, simultaneously output information oppositely sends main website again to, and chaufeur can judge whether correct whether information or load (as light fixture) damage.Thereby the electrical equipment that replaces point-to-point mode low-voltage electrical wire harness.

The utility model is that to solve the problems of the technologies described above the technical scheme that adopts be such, and promptly a kind of automobile electric bus comprises master controller, input/output interface board, some load distribution controllers, automobile combined switch, display keyboard and sensor; It is characterized in that: master controller comprises central processor CPU, sends, receives communicating circuit; The load distribution controller is made of transmission, reception communicating circuit and output driving circuit; Between master controller and load distribution controller by sending and receiving two connections and be connected, be that output, the input end that sends, receives communicating circuit in the load distribution controller is connected with master controller by input/output interface circuit by two intercommunication lines respectively, the control signal of automobile combined switch is connected with the data bus of master controller behind decoupling filter circuit, photoelectric isolating circuit and the interface circuit of input/output interface circuit.

In the bus of said structure, only the become hundred piece wire harness of conventional point have just been replaced with a power main (+12V power lead) to point mode with two intercommunication lines that send with receiving, the work such as design, making, installation, inspection, change and maintenance of automobile low-voltage electrical wiring have been simplified greatly, standardised generic is strong, the reliability height; Can save the copper material lead.It is as a whole that the various functions of instrument with the microprocessor are that core becomes, and is convenient to information exchange and resource sharing, also improved technical equipment.

(4), description of drawings

The utility model has following accompanying drawing:

Accompanying drawing 1 is a structural principle block diagram of the present utility model;

Accompanying drawing 2 is the scheme of installation of the utility model on automobile;

Accompanying drawing 3 is the schematic circuit diagram of the utility model master controller;

Accompanying drawing 4 is the schematic circuit diagram of the utility model input/output interface board;

Accompanying drawing 5 is the schematic circuit diagram of the utility model load distribution controller.

Referring to accompanying drawing: 1--12V storage battery among the figure; The 2--master controller; 3--speed of a motor vehicle display keyboard plate; The 4--time display plate; The 5--operating switch; 6--communication shielded cable; The 7--power line; The 8--car speed sensor; 9--load distribution controller (totally 7 of 9～F); The 10--automobile.

(5), the specific embodiment

The specific embodiment of the present utility model is referring to accompanying drawing 1,2: the automobile electric bus among the figure comprises master controller 2, input/output interface circuit, some load distribution controllers 9, automobile combined switch 5,

display keyboard

3,4 and sensor 8; It is characterized in that: master controller comprises central processor CPU, sends, receives communicating circuit; The load distribution controller is made of transmission, reception communicating circuit and output driving circuit; The output, the input end that wherein send, receive communicating circuit in the load distribution controller are connected with master controller by input/output interface circuit by two intercommunication lines 6 respectively, the control signal of automobile combined switch is connected with the data bus of master controller behind decoupling filter circuit, photoelectric isolating circuit and the interface circuit of input/output interface circuit.

Referring to accompanying drawing 3, main controller circuit among the figure, wherein main controller circuit comprises CPU (U1:8031), program store (U3:2764), data memory (U4:1225), address latch (U7:74LS373), address frameshit device (U8:74LS138), calendar clock (U2:DS12887), communication transtation mission circuit (U5:145026), acceptor circuit (U6:145027), data latches (U9, U10:74LS374), three state buffer (U11, U12:74LS374), shaping circuit (U13:74LS14), actuator (U14:7407), logic gates (U15:74SL32) constitutes, all digital circuits are pressed data bus (D0～D7), address bus (A0～A11) (read by control bus, write, the sheet choosing, latch etc.) and power supply and address, connect in the mode of bus.

Referring to accompanying drawing 4, the decoupling filter circuit that input/output interface circuit is made of resistance R 1～R48 and capacitor C 1～C24, photoisolator U16～U21 (TLP521), interface circuit U22 (8255) reach the imput output circuit that is made of photoisolator U23 and gate circuit U24 (4069) and form; Control incoming signal from automobile combined switch is imported through decoupling filter circuit and photoisolator, is sent to PA, PB, the PC mouth of interface circuit, connects master controller by the P0 mouth; Come transmission, reception and the vehicle speed pulse signal of autonomous controller, load distribution controller, import, export through the photoisolator U23 and the gate circuit U24 (4069) of imput output circuit.

Referring to accompanying

drawing

2,5, in the embodiment that accompanying drawing provides, master controller by two intercommunication cables with seven (9～F) load distribution controllers 9 are connected, and each load control dispenser meets 4 loads (9-1～9-4, A-1～A-4, B-1～B-4, C-1～C-4, D-1～D-4, E-1～E-4, F-1～F-4).Described load control dispenser is wherein carried out logic control by ternary isolation logic gate circuit U33 (4066) between transmission and the acceptor circuit by sending, receive communicating circuit U31, U32 (145026,145027) and output driving circuit formation; Described output driving circuit is made of resistance R A1～16, T1～T8, diode D1～D8, normally opened relay RL1～RL4, and its mouth receives and sends the data sending terminal of circuit U 31; Wherein: the data output end of acceptor circuit U32 is succeeded electrical equipment RL1～RL4 by resistance R A1～RA4, aerotron T1～T4, meet load 9-1～9-4 by sample resistance RA5～RA8 again, when relay is connected, load is normal, when having electric current to pass through, aerotron T5～T6 conducting, output high potential, receive and send the data sending terminal of circuit U 31 by RA13～RA16 and D5～D8 clamp output, send and feed back signal to master controller.

In foregoing circuit, the operational order of CPU timing acquiring chaufeur (keyboard and on-off signal) is carried out operation accordingly, sends signal (address code and numeric data code), call load dispensing controller by sending chip U5 by the mode of pulsewidth coding.The load distribution controller that has only the address to conform to just responds received signal and latch data, controls corresponding load (lamp, windscreen wiper etc.) work, sends the sense that receives to the biography controller simultaneously.After master controller receives that receiving chip U6 receives the reverse transmission signal of load distribution controller, provide and interrupt making response of host, judge it whether with send signal with consistent, damage to define trouble free or load, and send cue.Bus communication transmits signal by the time partitioning scheme, whenever has only a load distribution controller and master controller to carry out the sending and receiving communication at most.Simultaneously, CPU regularly exports the dynamic scan signal, and demonstration is provided.In addition, the CPU preceding 15 minutes information storage such as the speed of a motor vehicle of also will stopping are handled (automobile black box function) for the post analysis that has an accident in data memory.

Claims

1, a kind of automobile electric bus that is exclusively used in the wiring of automobile low-voltage electrical comprises master controller (2), input/output interface circuit, some load distribution controllers (9), automobile combined switch (5), display keyboard (3,4) and sensor (8); It is characterized in that: master controller comprises central processor CPU, sends, receives communicating circuit; The load distribution controller is made of transmission, reception communicating circuit and output driving circuit; Between master controller and load distribution controller by sending and receiving two connections and be connected, be that output, the input end that sends, receives communicating circuit in the load distribution controller is connected with master controller by input/output interface circuit by two intercommunication lines (6) respectively, the control signal of automobile combined switch is connected with the data bus of master controller behind decoupling filter circuit, photoelectric isolating circuit and the interface circuit of input/output interface circuit.

2, automobile electric bus according to claim 1, it is characterized in that: main controller circuit comprises CPU (U1), program store (U3), data memory (U4), address latch (U7), address frameshit device (U8), calendar clock (U2 :), communication transtation mission circuit (U5), acceptor circuit (U6), data latches (U9, U10), three state buffer (U11, U12), shaping circuit (U13), actuator (U14), logic gates (U15) constitutes, all digital circuits are pressed data bus (D0～D7), (A0～A11) control bus and power supply and ground wire connect in the mode of bus address bus.

3, automobile electric bus according to claim 1 is characterized in that: input/output interface circuit is by resistance (R1～R48) and electric capacity (the decoupling filter circuit of C1～C24) constitute, photoisolator (U16～U21), interface circuit (U22) and be made up of the imput output circuit of photoisolator (U23) and gate circuit (U24) formation; The control incoming signal that comes from automobile combined switch is sent to PA, PB, the PC mouth of interface circuit through decoupling filter circuit and photoisolator input, connects master controller by the P0 mouth; Come transmission, reception and the vehicle speed pulse signal of autonomous controller, load distribution controller, import, export through the photoisolator (U23) and the gate circuit (U24) of imput output circuit.

4, automobile electric bus as claimed in claim 1, it is characterized in that: the load control dispenser is wherein carried out logic control by ternary isolation logic gate circuit (U33) between transmission and the acceptor circuit by sending, receive communicating circuit (U31, U32) and output driving circuit formation; Described output driving circuit by resistance (RA1～16, T1～T8), diode (D1～D8), normally opened relay (RL1～RL4) constitute, its mouth receives and sends the data sending terminal of circuit (31); Wherein: ((T1～T4) succeeds electrical equipment (RL1～RL4) to the data output end of acceptor circuit (U32) for RA1～RA4), aerotron by resistance, (RA5～RA8) meets load (9-1～9-4) by sample resistance again, when relay is connected, load is normal, when having electric current to pass through, aerotron (T5～T6) conducting, output high potential, by (RA13～RA16) with (D5～D8) clamp output receives and sends the data sending terminal of circuit (U31), sends and feeds back signal to master controller.