CN201820143U

CN201820143U - Kreinik automobile diagnosis box based on personal computer (PC)

Info

Publication number: CN201820143U
Application number: CN201020249503XU
Authority: CN
Inventors: 张领
Original assignee: SHENZHEN AUTOSOS TECHNOLOGY Co Ltd
Current assignee: SHENZHEN AUTOSOS TECHNOLOGY Co Ltd
Priority date: 2009-08-26
Filing date: 2010-06-26
Publication date: 2011-05-04
Anticipated expiration: 2020-06-26

Abstract

The utility model discloses a Kreinik automobile diagnosis box based on a personal computer (PC), which comprises a diagnosis interface, a power module, a universal serial bus (USB) interface, a USB conversion parallel interface module, a control module, and a serial passage way conversion module, and is characterized in that a signal passage way, a signal voltage adaptive circuit, a multichannel signal control circuit and a protective circuit are additionally arranged; the power module is connected to the signal voltage adaptive circuit, and is connected to the signal passage way through the signal voltage adaptive circuit; and the multichannel signal control circuit is arranged between the adaptive circuit and the signal passage way. The transmit-receive pin and the logic are independent, thereby being capable of configuring the independent the transmitting pin and the receiving pin. Positive-negative logic can be controlled individually at the same time. In the Kreinik automobile diagnosis box provided by the utility model, the positive-negative logic, the matches of different signal voltages and signal pin matching of the different automobile diagnosis interfaces can be treated flexibly in automobile auxiliary diagnosis tools, the automaticity of a diagnosis process is much higher, and the integral product is very practical.

Description

K line vehicle diagnosis box based on PC

[technical field]

The utility model relates to the auto repair field, relates in particular to a kind of auxiliary diagnostic tool that services a car and use.

[background technology]

Automobile is as a kind of important vehicles of modern society, and its popularity is more and more higher, and along with the quantity of automobile constantly increases, automotive performance is good, operation is intelligent more, and the requirement of maintenance service is also all advanced with it, and the maintenance means are also constantly being weeded out the old and bring forth the new.Apply to diagnose the auxiliary diagnostic tool of automotive interior system also to be grown up as a kind of important means.All kinds of cars of domestic different auto vendors, Transportation Engineering car, the physical electrical layer of the vehicle diagnosis interface of specific function car, each is different to some extent because of producer is different.Reach based on CAN agreement, KWP2000 agreement etc. on tens of kinds the agreement, the physical electrical layer also has nothing in common with each other.Based on the Physical layer voltage of the diagnose interface of the physical electrical layer (so-called industry slang K line) of KWP2000 agreement, gasoline car is 12V in principle, and along with the enforcement of state III exhaust standard, the diesel car has increased electronic control module.And the signal of the diagnose interface of ECU is 24V.Indivedual cars are the 5V signal such as the diagnose interface Physical layer of Honda.The interface link block of existing diagnostic equipment mostly adopts the individual relay of single K line+N (N＞1) to carry out the passage switching.There is the single problem of adapt voltages, perhaps adaptive 5V and 12V signal or single 24V.This mode causes partial function test obstacle for comprehensive diagnostic equipment.Mechanical relay control also causes the diagnostic equipment signal to be interfered, and therefore can't obtain effective reliable diagnostic data, and this is a great technical matters that needs to be resolved hurrily in the industry.

[summary of the invention]

The utility model provides for addressing the above problem that a kind of diagnostic signal is interference-free, diagnostic function test is accessible, diagnostic data is reliable, need not relay carry out that passage switches, transmitting-receiving is independent, mixed logic is compatible, make the diagnostic procedure K line vehicle diagnosis box based on PC of robotization more.

The utility model at the technical scheme that above problem proposes is: described K line vehicle diagnosis box based on PC, its structure comprises that diagnose interface, power module, USB interface, USB change parallel port module, control module, serial-port modular converter, it is characterized in that, be provided with signalling channel, signal voltage in addition from adapter circuit, multiple signals control circuit and holding circuit; Described power module is connected to signal voltage from adapter circuit, by being connected to signalling channel from adapter circuit, at the described multiple signals control circuit that is provided with between adapter circuit and signalling channel.

Described signalling channel is formed positive logic communicating circuit and negative logic communicating circuit by two parts;

Described signal voltage is in adapter circuit; wherein diagnosis box receives automobile power source power supply input end: VCC_IN; through the F1 overcurrent protection; and Transient Voltage Suppressor D1, R3, C1, sheet stype common mode choking coil Z1 carry out filter shape, further provides voltage adaptation for PC diagnosis box output interface module.

The beneficial effects of the utility model are: transmitting-receiving pin and logic are independent, can dispose independent transmission pin and receive pin.The also independent simultaneously control of mixed logic, the utility model is handled the coupling of mixed logic, unlike signal voltage and the signal pins coupling of different vehicle diagnosis interfaces very neatly in the automobile auxiliary diagnostic tool, the automaticity of diagnostic procedure is more increased, the practicality very of product integral body.

[description of drawings]

Fig. 1 is the utility model hardware block diagram;

Fig. 2 is the utility model workflow diagram;

Fig. 3 is the utility model mixed logic communicating circuit figure;

Fig. 4 is that the utility model signal voltage is from adapter circuit figure;

Fig. 5 is the utility model positive logic transmitting channel control signal circuit diagram;

Fig. 6 is the utility model negative logic transmitting channel control signal circuit diagram.

[embodiment]

In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.

With reference to figure 1: described K line vehicle diagnosis box based on PC, its structure comprises that diagnose interface, power module, USB interface, USB change parallel port module, control module, serial-port modular converter, it is characterized in that, be provided with signalling channel, signal voltage in addition from adapter circuit, multiple signals control circuit and holding circuit; Described power module is connected to signal voltage from adapter circuit, by being connected to signalling channel from adapter circuit, at the described multiple signals control circuit that is provided with between adapter circuit and signalling channel.

USB interface is connected to USB changes the parallel port module, and signal flow forwards control module to then, and control module is connected to the multiple signals control circuit.

Described signalling channel is made up of two parts, positive logic communicating circuit and negative logic communicating circuit, and with reference to the accompanying drawings 3, the positive logic communicating circuit, put at CTR_F1 under 0 the situation: Q3, Q7 end; CTR_Z1 puts 1. and sends signal TXD, forms positive logic K line by Q4, U1B, Q5, Q6, R5, R9, R6, Q8, R7, F1 and sends.And the negative logic communicating circuit puts 0:Q8, Q5 at CTR_Z1 and ends, and the positive logic path is in high-impedance state; CTR_F1 puts 1:Q1, Q2, R1, R2, R8, R3, Q7, Q3 are in communication state.Work as CTR_Z1, CTR_F1 put 0 o'clock simultaneously, and PIN_K1 is in high-impedance state.

4 described signal voltages are in adapter circuit with reference to the accompanying drawings; wherein diagnosis box receives automobile power source power supply input end: VCC_IN; through the F1 overcurrent protection; and Transient Voltage Suppressor D1, R3, C1, sheet stype common mode choking coil Z1 carry out filter shape, further provides voltage adaptation for PC diagnosis box output interface module.

Described multiple signals control circuit comprises: positive logic sendaisle control signal, negative logic sendaisle control signal, accept channel control signals, mixed logic control signal.With reference to the accompanying drawings 5 with circuit wherein be example as can be known, positive logic sendaisle control signal process, it is effective that CTR_Z1, CTR_Z2, CTR_Z3, CTR_Z4, CTR_Z5, CTR_Z6, CTR_Z7, CTR_Z8 put 1 respective channel, it is invalid to put 0 respective channel.Is example according to Fig. 5 with circuit wherein, negative logic sendaisle control signal process, and it is effective that CTR_F1, CTR_F2, CTR_F3, CTR_F4, CTR_F5, CTR_F6, CTR_F7, CTR_F8 put 1 respective channel, and it is invalid to put 0 respective channel.Receiving cable control signal: IN_CTR_A, IN_CTR_B, IN_CTR_C receiving cable are selected.Mixed logic control signal: LOG_OUT, LOG_IN.

PC diagnosis box workflow as shown in Figure 2, by the USB interface received signal, USB changes the parallel port module and transmits the communication data that PC is met microprocessor immediately, has microprocessor to wait for and receives data, realizes data-switching, and realizes the adaptive selection of hardware corridor; Next flow process is promptly carried out safety detection, and testing result is Yes, continues to next step operation, if be this passback safety failure of No, waits pending data to detect again; Carry out the selection of system information key word, be assigned to different channels then and handle.

Its unique beneficial effect of the utility model is, can accomplish to receive and dispatch pin and logic independently, can dispose independent pin and the reception pin of sending. Mixed logic is also independent control simultaneously, the utility model is processed the coupling of mixed logic, unlike signal voltage and the signal pins coupling of different vehicle diagnosis interfaces very neatly in the automobile auxiliary diagnostic tool, the automaticity of diagnostic procedure is more increased, the practicality very of product integral body.

Claims

1. K line vehicle diagnosis box based on PC, its structure comprises that diagnose interface, power module, USB interface, USB change parallel port module, control module, serial-port modular converter, it is characterized in that, be provided with signalling channel, signal voltage in addition from adapter circuit, multiple signals control circuit and holding circuit; Described power module is connected to signal voltage from adapter circuit, by being connected to signalling channel from adapter circuit, at the described multiple signals control circuit that is provided with between adapter circuit and signalling channel.

2. according to the described K line vehicle diagnosis box of claim 1, it is characterized in that described signalling channel is formed positive logic communicating circuit and negative logic communicating circuit by two parts based on PC.

3. according to the described K line vehicle diagnosis box of claim 1 based on PC; it is characterized in that; described signal voltage is in adapter circuit; wherein diagnosis box receives automobile power source power supply input signal; through overcurrent protection; and filter shape, further provide voltage adaptation for PC diagnosis box output interface module.