JPH06258371A - Wire harness inspection device - Google Patents

Abstract

PURPOSE:To provide an improved wire harness inspecting device that inspects conduction of wire harness with ease and in a short time. CONSTITUTION:A multiple-signal line 11 that connects a master unit to multiple wire harnesses, a line number reference recording part 2 that records the connection line number of wire harness, an inspection instructing part 5 that directs the inspection of a unit, a failure deciding part 6 that compares the inspection response data with the data of a line number reference recording part 2 for deciding failure, an inspection signal transmitting part 24 that transmits inspection signal to a specified line number for each unit, an inspection signal detecting part 25 that detects inspection signal, and, an inspection response part 27 that transfers the detected line number to the master unit, are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire harness inspection device for inspecting the continuity of a wire harness.

[0002]

2. Description of the Related Art In today's vehicles and the like, many electronic devices are connected, and signal lines for transmitting monitoring control signals between these devices are bundled to form a wire harness as shown in FIG. It is attached to the vehicle.

Terminals of signal lines forming a wire harness are connected to sockets 40-A to 40-D as shown in FIG. That is, the socket 40-A has m pins.
And the signal lines m ′ (m ′ ≦ m) of the wire harness are connected. The same applies to other sockets.

A conventional device for inspecting the continuity of such a wire harness is connected to an inspection device through a socket,
The test signal is sent to all the connected signal lines in sequence, and it is checked whether the test signal is output from all the signal lines other than the signal line sending the test signal, and the test signal is output. The conduction failure is inspected depending on whether the existing signal line is the signal line at the time of design.

[0005]

Therefore, in the continuity test, the inspection is performed by searching whether or not the test signal is output to all the connection lines other than the connection line that has sent the test signal. In other words, if the terminal of the signal line of the wire harness is N, the connection line of N (N-1) / 2 is inspected, and it takes a long time to search.

Further, in order to inspect the continuity of the wire harness, it is necessary to use the same socket as the socket connected to the wire harness for connection with the inspection device. I had to change the connection. It is an object of the present invention to provide a wire harness inspection device which is improved so that the continuity inspection of the wire harness can be easily and quickly inspected.

[0007]

Means adopted by the present invention for solving the above-mentioned problems will be described. In a device for inspecting continuity of a wire harness, (a) a multiple signal line connecting a master unit and a plurality of units connected to the wire harness, and (b) a signal line of the wire harness of the plurality of units to the master unit. A wire number comparison recording unit that records the wire number of the unit to which is connected, and (c) an inspection command unit that issues an inspection command to the wire number of the unit recorded in the recording unit in the wire number recording unit, (D) A defect determination unit that determines a defect by comparing the inspection response data from each unit with the data recorded in the wire number comparison recording unit, and (e) is instructed to each unit by the inspection command unit. A test signal sending section for sending a test signal to a designated wire number of the unit, (f) a test signal detecting section for detecting a test signal of a signal line connected to the self unit, and (g) the test signal detecting section. Comprising a test response unit for transferring the detected line numbers to the master unit.

[0008]

The plurality of units connected to the wire harness and the master unit are connected by the multiple signal lines to transfer data. The inspection command unit of the master unit commands the wire number of the unit recorded in the wire number comparison recording unit to send an inspection signal.

Further, the defect judging section compares the inspection response data from each unit with the data recorded in the wire number comparison recording section to judge pass / fail. The inspection signal sending unit of each unit sends an inspection signal to the wire number designated by the master unit.

Further, the inspection signal detection unit determines whether or not the inspection signal is output to the signal line connected to the self unit, and the inspection response unit sets the line number from which the inspection signal is output to the master unit. Forward. As described above, the master unit and multiple units are connected by multiple signal lines, and in response to a command from the master unit, the inspection signals are sequentially sent out to the signal lines of the wire harness connected to each unit, and each unit simultaneously sends wires. Since it is determined whether the inspection signal is output to the signal line connected to the harness and the output wire number is transferred to the master unit to determine whether the continuity is good or not, the inspection signal is The search time for determining whether or not the data is output is shortened, and the continuity test can be performed in a short time.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a configuration diagram of an embodiment of the present invention, FIG. 2 is an explanatory diagram of an adapter for connecting each unit and a wire harness, FIG. 3 is a specific example of a wire number comparison recording unit of the embodiment, and FIG. 4 is a multiple signal line. FIG. 5 is an explanatory diagram of a frame format and a signal configuration of the transfer signal, FIG. 5 is an operation flowchart of the master unit of the embodiment, and FIG. 6 is an operation flowchart of each unit of the embodiment.

First, the configuration of the embodiment will be described with reference to FIG. Note that FIG. 1A shows the configuration of the master unit, and FIG.
Indicates the configuration of each unit. In FIG. 1A, reference numeral 1 is an input section for performing various inputs, and 2 is a wire number comparison recording section, which will be described later with reference to FIG. 3 is an ID which is the data of the data transferred via the multiplex signal line 11 to its own unit.
Own ID determining unit for determining the
RC check unit, 5 is an inspection command unit that issues an inspection command to each unit, 6 is a defect determination unit that determines the quality of the inspection result,
7 is an inspection result recording unit for recording inspection results, 8 is a display unit,
9 is a printer, 10 is an interface (I / O), 11
Is a multiple signal line, and 12 is a processor (CPU).

Further, in FIG. 1B, 21 is an ID setting section for setting the ID of its own unit, 22 is its own ID determining section, 23 is a CRC checking section, 24 is an inspection signal sending section,
Reference numeral 25 is an inspection signal detection unit, 26 is a socket, 27 is an inspection response unit for transferring the inspection result of the inspection signal detection unit 22 to the master unit, 28 is an I / O, 29 is a CPU, 30 is an OR circuit, and 31 is a display. It is a department.

The unit shown in FIG. 1B is connected to the number-multiplexed signal line 11 of the socket attached to the wire harness, as shown in FIG. Further, the number of pins M of the socket 26 is the same as the maximum number of pins M of the sockets attached to the expected wire harness.

To connect the socket 26 to the socket 40-A of the wire harness shown in FIG. 2, for example, a socket corresponding to the socket 26 and the socket 40-A is prepared, and a connecting wire 43 connects between them. Connection is made with the adapter 32. That is, the socket 26 is connected to the inspection signal transmission unit 24 and the inspection signal detection unit 25 by M lines, but the adapter 42 connects 1 to m among them to the socket 40-A.

Thus, the socket 26 and the socket 40-
By connecting A with an adapter, socket 40-
By simply preparing an adapter corresponding to the shape A, connection to any wire harness can be completed easily, and inspection setup time can be shortened.

Next, referring to FIG. 4, the multiple signal line 11
A data transfer method in the above will be described. Multiple signal line 11
As shown in FIG. 4 (A), the frame format of the signal at the time of data transfer via the, first, the bit SOF indicating the frame start, the bit PRI indicating the transfer data priority, and the unit of the data transfer destination. Show D
ID, SID indicating unit of data transfer source, DATA as transfer data, CR for checking transfer error
C, EOD indicating the end of data, bit RES for sending a response to transfer data, and bit EOF indicating the end of frame.

The response RES is sent from the transfer destination unit, and the other units are sent from the transfer source unit.
In addition, the signals "1" and "0" in the frame are as shown in FIG.
As shown in (B), "1" is the signal value V of 1/3 of the 1-bit length, the remaining 2/3 is 0, and "0" is
As shown in FIG. 4C, the signal value V is transmitted with a 2/3 bit length, and the remaining 1/3 is 0.

Further, the arbitration when the data is simultaneously sent from the respective units to the multiple signal line 11 uses the winning arbitration. That is, FIG.
As shown in (B) and (C), when "1" and "0" are transmitted at the same time, as a result, the signal on the multiplex signal line 11 has the last 1/3 bit length of 1 bit equal to 0. And the signal becomes "0".

Therefore, the unit transmitting "1" monitors the signal on the multiplex signal line, and when the signal on the multiplex signal line is determined to be "0", the data transfer of its own unit is stopped and the unit remains unsuccessful. Only those that are transferred. Before operating the apparatus, each unit sets the ID of its own unit in the ID setting unit 21.

The ID value to be set is the same as the socket number of the wire harness connected to the socket 26. Further, the reference data of the socket number and the pin number to which the signal line of the wire harness is connected is input from the input unit 1 to the line number comparison recording unit 2 of the master unit.

That is, for example, as shown in FIG. 3, pin number 1 of socket number 1 is pin number 5 of socket number 3, and pin number 2 of socket number 1 is pin number 4 and socket number 4 of socket number 2. Data indicating that the connection is made with the pin number 5 of is recorded.

Further, the pin number 30 of the socket number 1 is connected to the pin number 1 of the socket number 2, and a diode is inserted between the pin number 30 and D +, which shows conduction in two directions than the socket number 1, does not conduct in the opposite direction. The indicated D- etc. are also recorded. Next, the operation of the master unit will be described with reference to FIG.

Process S1 In process S1, the inspection command section 5 reads the data recorded in the wire number comparison recording section 2 and sends an inspection signal to the #j pin to the #i unit corresponding to the read data. Order to do so.

That is, when the data shown in FIG. 3 is recorded in the wire number comparison recording section 2, first, the socket number 1 and the pin number 1 which are the first data are read. Since the socket number is 1, the inspection command unit 5 sets the DID described in FIG. 4A to 1 and the SID is the ID of the master unit.
0 is inserted into DATA, and a code indicating that the inspection signal is to be sent is inserted in the 1st pin of DATA, and the multiplexed signal line 11 is transmitted through the I / O 10.
Send to.

Process S2: It is determined whether or not the data transferred in the process S1 has been transferred to the partner station without error. If NO, the process returns to the process S1 to retransfer, and if YES, the process moves to the process S3. Process S3 In process S3, inspection data is received from each unit, which will be described later with reference to FIG.

Process S4 In process S4, the defect determining unit 6 compares the received data with the data in the wire number comparison recording unit 2 in process S3, determines whether the inspection result is OK, and if YES, advances to process S8. , NO, the process proceeds to step S5.

Whether or not the inspection result is OK is determined by, for example, if the inspection signal output command is issued by reading the first recorded data in FIG.
If the inspection data of the pin number 1 from 1 unit and the pin number 5 from the # 3 unit is received, it is determined to be OK, and otherwise, it is determined to be defective.

For the thirtieth, if the thirtieth pin is received from the # 1 unit and the first pin is received from the # 2 unit, then the first pin is received from the # 2 unit for the thirty-first unit. If it is received, it is determined to be OK. Therefore, if the data at the location recorded in FIG. 3 is not received, it is determined that there is a wire break, and if the data other than the recorded data is received, it is determined as a short circuit.

Processes S5 to S6 When the result of the determination in process S5 is NO, the defect determining unit 6 records the defective part in the inspection result recording unit 7 and displays it in the display unit 8 in process S5. In step S6, the defective data is transferred to the unit that has been determined to be defective and has sent the data.

Process S7 In process S7, the process is restarted when the inspection process in the unit determined to be defective is completed. Process S8 In process S8, it is determined whether or not the inspection of the signal lines connected to all sockets of the wire harness is completed. If NO, the process proceeds to process S1 and S1 to S8 are repeated. If YES, the process ends.

Next, the operation of each unit will be described with reference to FIG. FIG. 6A shows a general operation, and FIG. 6B shows an interrupt operation. First, the general operation will be described. Process S10 In process S10, the self ID determination unit 22 constantly monitors the data transferred by the multiplex signal line 11 and determines whether or not the data is transferred to the self unit. , CRC check section is OK
If so, ACK to the RES bit shown in FIG.
If G, NAC is sent.

Process S11 In process S11, the transferred data is analyzed, and if it is an inspection command, the process proceeds to process S12, and if it is a defective display, the process proceeds to process S15. That is, it is determined whether the master unit is for the process S1 or the process S6.

Process S15 If the defect is displayed, it is displayed on the display unit 31, the process is terminated, and the next inspection is started. In this way, if there is a defective part, the unit judged to be defective is also displayed so that the defective part can be known every time a defect occurs without going to the place where the master unit is installed. Therefore, subsequent inspection processing can be easily performed.

Process S12 If the transferred data is the inspection command, in process S12,
The inspection signal sending unit 24 sends an inspection signal from the master unit to the pin number designated by the transfer data.

Process S13 In process S13, it is determined whether or not the inspection signal is detected in the pin connected to the socket 26. If NO, the process is terminated, and if YES, the process proceeds to process S14.

That is, when the OR circuit 30 is "1", the inspection signal detecting section 25 is activated, and when it is "0", the processing is terminated without being activated, and the next inspection is started. Process S14 The inspection response unit 27 transfers the pin number for which the inspection signal is detected by the inspection signal detection unit 24 and the inspection signal is detected, to the master unit, and the process S is terminated.

Next, the interrupt processing will be described. Each unit starts an interrupt process when "1" is detected in the output of the OR circuit 30. Process S20 The inspection response unit 27 of each unit transfers the pin number for which the inspection signal is detected by the inspection signal detection unit 25 to the master unit and ends the interrupt process.

Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and various modifications can be made according to the gist of the invention.

[0040]

As described above, according to the present invention, the following effects can be obtained. The master unit and multiple units are connected by multiple signal lines, and in response to a command from the master unit, inspection signals are sequentially sent to the signal lines of the wire harness connected to each unit, and each unit is connected to the wire harness at the same time. It is determined whether or not the inspection signal is output to the master unit by determining whether the inspection signal is output to the existing signal line and transferring the output wire number to the master unit. The search time to determine whether
The continuity test can be performed in a short time.

Since the sockets connected to each unit and the sockets connected to the wire harness are connected by the adapter, it is possible to easily connect to any wire harness only by changing the adapter. Inspection setup time can be shortened.

If there is a defective portion, the unit judged to be defective is also displayed, so that it is possible to know the defective portion without having to go to the place where the master unit is installed every time a defect occurs. The subsequent inspection process can be easily performed.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an adapter that connects each unit of the embodiment and a wire harness.

FIG. 3 is a specific example of a wire number comparison recording unit of the embodiment.

FIG. 4 is an explanatory diagram of a frame format and a signal configuration of a transfer signal of a multiple signal line.

FIG. 5 is an operation flowchart of the master unit according to the embodiment.

FIG. 6 is an operation flowchart of each unit of the embodiment.

FIG. 7 is a specific example of a wire harness.

[Explanation of symbols]

 1 input section 2 wire number comparison recording section 3,22 own ID determination section 4,23 CRC check section 5 inspection command section 6 defect determination section 7 inspection result recording section 8, 31 display section 9 printer 10, 28 interface (I / O) ) 11 multiple signal lines 12, 29 processor (CPU) 21 ID setting unit 24 inspection signal transmission unit 25 inspection signal detection unit 26, 40 socket 27 inspection response unit 30 OR circuit 41 wire harness 42 adapter 43 connection line

Claims (3)

[Claims] 1. A device for inspecting the continuity of a wire harness, comprising: (a) a multiple signal line connecting a master unit and a plurality of units connected to the wire harness; and (b) a plurality of units connected to the master unit. An inspection command is issued to the wire number comparison recording unit that records the wire number of the unit to which the signal line of the wire harness is connected, and (c) the wire number of the unit recorded in the recording unit in the wire number recording unit. An inspection command unit, (d) a defect determination unit that determines a defect by comparing the inspection response data from each unit and the data recorded in the wire number comparison recording unit, and (e) the inspection An inspection signal transmission unit for transmitting an inspection signal to a designated wire number of the unit instructed by the instruction unit, (f) an inspection signal detection unit for detecting an inspection signal of a signal line connected to the self unit, and (g) the above Wire harness inspection apparatus characterized by comprising: a test response unit for transferring the line number which is detected by the scanning signal No. detection unit to the master unit. 2. Between a socket A to which M output lines from the unit are connected and a socket B to which n signal lines of the wire harness are connected, a socket C and a socket B corresponding to the socket A are provided. 2. The wire harness inspection device according to claim 1, wherein the sockets D corresponding to are connected by an adapter connected by m (m ≦ M) connecting wires equal to the number of terminals of the socket D. 3. When the defect determination section of the master unit determines that the defect is defective, the defect result is transferred to the unit corresponding to the wire number determined to be defective, and the transferred result is displayed on the transferred unit. The wire harness inspection device according to claim 1 or 2, wherein.