JPH0656981B2 - Inspection device with pseudo signal input function - Google Patents

Description

The present invention relates to an inspection device with a pseudo signal input function suitable for a looped multiple harness system in an automobile.

[Prior Art] Conventionally, as a multiplex harness system in an automobile, there is an automobile technique, 38 [2] 1984, P215 to P22.
There is one described in 1. As described in the document, a time division multiplex method is suitable as a harness multiplexing method, and distributed processing is superior to centralized processing in terms of functionality. It is said.

In an actual automobile, switches, sensors, and actuators are distributed in various places, so a network configuration in which multiple harness control devices (hereinafter simply referred to as “nodes”) are also distributed and each node is While inputting signals from switches and sensors, various loads are driven by power switches. In addition, load control often requires some logic processing in addition to turning on / off one switch, and the node itself has these logic processing functions.

Here, in the event of a failure such as when a certain load is not controlled for some reason, in order to limit the failure point, the corresponding input of each node is pseudo-input to set the load control logic condition. You need to be satisfied and try to control its load. Also, in actual vehicle debugging, it is necessary to artificially input the corresponding input to perform specific load control. In such a case, remove the input connector for inputting the signal from the switch or sensor conventionally connected to the relevant node and connect the check switch or pseudo sensor output to all the input connectors. At the same time, I was setting it.

[Problems to be solved by the invention]

However, in the system with the above configuration, even if the switch for checking and the pseudo sensor output corresponding to all the inputs of the input connector connected to the corresponding node are prepared in advance and the connection is changed by the connector, However, there is a drawback in that not only different ones corresponding to each node must be prepared, but also a great deal of time is required for setting them, and explanation errors may occur frequently. Also, as an example of a limited device for limiting the failure point, there is one disclosed in Japanese Patent Publication No. 59-16302, but the device having a maintenance function built in a node has a limitation in mounting, and the cost is reduced. It is not a good idea to incorporate a maintenance function in the node from the viewpoint of improving operability, and because there is no pseudo load control means for a specific load, which input system or output system fails in the entire system. There was also the drawback that it could not be separated.

The present invention has been made in view of the above points, and it is an object of the present invention to eliminate the above-mentioned drawbacks, to provide an inspection device with a pseudo signal input function, which has no restrictions on mounting and is excellent in operability.

[Means for solving problems]

In order to solve the above problems, the present invention is configured such that a plurality of nodes are connected in a loop by a transmission line, each node is equal with no parent-child relationship, and data is cyclically and cyclically transmitted according to a fixed node order. In an external inspection device with pseudo signal input function that is used by connecting to each node of a multiple harness system, when multiple nodes are in a transmission mode, other nodes are in a relay mode. In the inspection device with the pseudo signal input function, when the node to which the inspection device with the pseudo signal input function is connected is in the relay mode, the reception storage means for receiving and storing the data from the data transmission line via the node. And a pseudo data setting means having a pseudo input function for setting data input as a pseudo signal, and a data processing control means. When the pseudo input function of the data setting means is used, the data set by the pseudo data setting means and the data stored in the reception storage means are inspected with the pseudo signal input function by the pseudo input setting notification from the pseudo data setting means. In the transmission mode of the node to which the device is connected, the data is transmitted to the data transmission path via the node instead of the node in the same sequence, format and timing as the actual data.

[Action]

As described above, according to the present invention, the inspection device is externally attached, and the data received via the data transmission line is used for the input data other than the pseudo input, and the same data as the actual data is used for the data transmission line. Since it is configured to send out with the sequence, format and timing of, the size of the node is different from the conventional method in which the inspection device is built in the node,
Limitation of obstacles, improvement of operability during soft debugging (actual vehicle debugging), and reduction of time can be achieved without inviting higher prices.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of an inspection device and a node according to the present invention, and FIG. 2 is a configuration diagram of a looped multiple harness system in an automobile using the inspection device according to the present invention.

In FIG. 2, 1 to 5 are nodes connecting the respective devices, and 6
Is a data transmission line for transmitting data, and each node 1 to
5 are connected in a loop by a data transmission line 6. Further, 7 is an external inspection device 11, 21, 31, 4
Reference numerals 1 and 51 denote a plurality of input information lines for inputting signals from switches and sensors connected to the nodes 1 to 5, and reference numerals 12, 22, 32, 42 and 52 are connected to the nodes 1 to 5, respectively. A plurality of control output lines for controlling the load, 13, 23, 33, 43,
Reference numerals 53 are connection lines for connecting the inspection device 7 and the nodes 1 to 5, respectively. The connection lines are respectively connected to the nodes 1 to 5 when the inspection device 7 is used.

Further, in FIG. 1, 4, 6, 7, 41 and 43 are second
The same parts as in the figure are shown. Reference numerals 44 and 74 denote microprocessors, which have a RAM, a serial port, and an I / O port. 441,741
Is a ROM for storing programs, 411 is a power switch, 451 and 452 are selectors, 461, 462 and 76
1 is a driver, 471, 472, 771 is a receiver, 4
Reference numerals 81 and 781 are transmission lines that transmit data to the data transmission path 6, and reference numerals 482 and 782 are reception lines that receive data from the data transmission path 6. The transmission line 481 connects the microprocessor 44 and the data transmission line 6 via the selector 451 and the driver 462, and the transmission line 781 connects the microprocessor 74 and the data transmission line 6 to the driver 76.
1, receiver 471, selector 451 and driver 4
It is connected via 62. The reception line 482 connects the data transmission line 6 to the selector 451, the driver 461 and the microprocessor 44 via the receiver 472, and also the driver 461, the receiver 771 and the reception line 7.
It is connected to the microprocessor 74 via 82. Reference numerals 483 and 783 denote transmission relay switching control lines. The transmission relay switching control line 483 connects the microprocessor 44 and the selection pin of the selector 451 via the selector 452, and the transmission relay switching control line 783 connects to the microprocessor 74. The selection pin of the selector 451 is the driver 761,
It is connected via the receiver 471 and the selector 452. Reference numeral 791 is a pseudo data setting switch for setting only the data to be pseudo input, 792 is a setting confirmation LED for confirming the setting of the pseudo input data, 71 is an input information line, and 72 is a control output line. Information line 71
Connects the pseudo data setting switch 791 and the microprocessor 74, and the control output line 72 connects the microprocessor 74 and the setting confirmation LED 792.
Reference numerals 484 and 784 are pseudo input setting lines. The pseudo input setting line 784 connects the pseudo data setting switch 791 to the microprocessor 74 and the driver 761, and the pseudo input setting line 484 is the driver 761 to the microprocessor 44. The selection pins of the selectors 451 and 452 are connected via the receiver 471.

Next, the multiple harness system shown in FIG. 2 and the first
The operation of the node 4 and the inspection device 7 shown in the figure will be described.
In the above-mentioned multiple harness system, each node 1 to 5 sends data in a time-division and cyclic manner according to a fixed node order (for example, 1, 2, 3, 4, 5 order), and the node 4 sends data. At the timing of transmitting, the microprocessor 44 turns on the transmission relay switching control line 483 to switch the selector 451 to the transmission mode, and then outputs all the data from the switches and sensors input via the input information line 41. The input data is sent to the transmission line 481. The transmission data sent to the transmission line 481 is the selector 4
Data transmission path 6 via 51 and driver 462
Send to. After sending the transmission data, the microprocessor 44 puts the selector 451 into the relay mode by turning off the transmission relay switching control line 483. That is, when the nodes 1 to 3 and 5 are in the transmission mode, the selector 451 of the node 4 is in the relay mode.

In the relay mode, the data from the data transmission line 6 is transferred to the receiver 472, the reception line 482, the selector 451,
It is relayed to the data transmission line 6 via the driver 462. Further, the data from the data transmission line 6 is received by the receiver 47.
2, via the receiving line 482, the microprocessor 44
The external inspection device 7 is constantly received by the node 4
When the data is transmitted from the data transmission line 6, the data from the data transmission line 6 is received by the receiver 472, the reception line 482, and the driver 46.
1, always received by the microprocessor 74 via the receiver 771, the reception line 782, and the R contained therein.
Stored in AM. In other words, the microprocessor 74 of the inspection device 7 is connected to the inspection device 7 by connecting the node (node 4 in FIG. 2) to the node connected via the input information line (41 in FIG. 2). It is possible to constantly receive and store the transmission data sent to the data transmission line 6, including all the input data from the switch and the sensor. Here, a procedure for setting only the data to be pseudo-input will be described. First, after connecting the inspection device 7 to the node 4 which desires the pseudo input, the pseudo input data switch 791 turns on the pseudo input setting line 784. When the pseudo input setting line 784 is turned on, the pseudo input setting is notified to the microprocessor 74, the pseudo input setting is also notified to the microprocessor 44 via the driver 761, the receiver 471 and the pseudo input setting line 484, and the selector is selected. 451 and 452 are switched from node valid to check device valid. The microprocessor 74 notified of the pseudo input setting turns on the transmission relay switching control line 783 at the timing when the node 4 transmits, thereby switching the selector 451 to the transmission mode via the driver 761, the receiver 471, and the selector 452. After that, by sending all input data from the switch and the sensor input via the input information line 41 stored in the microprocessor 74 to the transmission line 781, the data is sent via the driver 761, the receiver 471, the selector 451, and the driver 462. It is sent to the transmission line 6. After transmitting the transmission data, the microprocessor 74 puts the selector 451 into the relay mode by turning off the transmission relay switching control line 783. In the relay mode, the data from the data transmission line 6 similar to the case where the pseudo input is not performed is the receiver 472 and the reception line 48.
2, relayed to the data transmission line 6 via the selector 451 and the driver 462. The data from the data transmission line 6 is always received by the microprocessors 44 and 74. Next, set only the data that you want to make a pseudo input.

FIG. 3 is a schematic flowchart showing the processing of the microprocessor 74 for setting the pseudo input data. The setting of the pseudo input data is performed by using the eight data switches of the pseudo input data setting switch 791 and the three trigger switches (none of which are shown).

First, in step (1), the byte number of the data to be pseudo-input is set. That is, the pseudo input data is the information input line of the node to which the inspection device 7 is connected.
Signals from the switch and the sensor are input via (the information input line 41 in FIG. 2) and all the input data are sent to the data transmission line according to a certain time slot.
Set the byte number of the transmitted data. For example, in the case of the 1st byte, the 8 data switches are 2
Set it to 00000001 in the base number and press the first trigger switch (note that 0 is switch-off and 1 is switch-on).

In step (2), the valid bit is set. That is, a valid bit is set which bit in the 1-byte data to be set in the subsequent step (3). For example, when setting the 2nd to 5th bits, the eight data switches are set to 001111100 in binary and
Press the trigger switch of.

In step (3), the pseudo input data is set.
For example, if the 5th and 4th bits are set to 1 and the 3rd and 2nd bits are set to 0, the eight data switches are set to XX1100XX in binary, and the third trigger switch is pressed. . Note that it is not necessary to set x here. The setting data set in steps (1) to (3) are displayed on the setting confirmation LEDs 792 of the pseudo input data.

In step (4), the microprocessor 74 takes the AND condition of the effective bit set in steps (2) and (3) and the pseudo input data, and as a result, stores A in the RAM. For example, the AN of the valid bits 0011110 and XX1100XX set in the step (2)
D condition is taken, and as a result, R is 00110000
Remember in AM.

In step (5), the microprocessor 74 inverts the valid bit set in step (2), takes an OR condition with the pseudo input data set in step (3), and stores the result O in RAM. . For example, the step
11000 which was set in (2) and was inverted from 00111100
The OR condition of 011 and XX1100XX is taken, and as a result O, 11110011 is stored in the RAM. In step (6), the microprocessor 74 determines whether the node (4) stored via the data transmission line (6) receives the input signal from the switch and the sensor input via the input information line (41), and outputs the signal from the step (1). ) AND the data DN with the same byte number as the one set in), the valid bit taken in step (4) and the pseudo input data
The OR condition with the result A of the condition is taken, and the result DA is RA
Store in M. For example, XXXXXXXXXXX and 00110
The OR condition with 000 is taken and xx11xxxx is stored.

In step (7), the microprocessor 74 determines the result O of the OR condition taken in step (5) and the step (6).
The AND condition with the result of the OR condition taken in
Replace the data DN with O. For example, 11110011
AND condition of ×× 11 ×××× and ×× 1100
Replace the data DN with XX.

In step (8), if there is a different byte number setting, return to step (1) above.If there is a change in the valid bit setting, return to step (2) above, and if there is a change in the pseudo input data setting. Step (3) above
Return to. If there is no different byte number setting, valid bit setting change or pseudo input data setting change, the process ends. As described above, the data DN replaces the data DO and is sent to the data transmission line 6 at the timing when the node 4 sends the data DN together with other data stored in the microprocessor 74.

In the above embodiment, the case where the number of nodes is 5 has been shown, but it goes without saying that the number of nodes may be 3 or more.

As described above, according to the above embodiment, each node 1 of the looped multiple harness system in the automobile is
Connection lines 13, 23, 33 for connecting the inspection device 7 to
43, 53 and each of the nodes 1 to 5 and the inspection device 7 are provided with means for transmitting data to the data transmission line 6, and the inspection device 7 is provided with pseudo data for setting only data to be pseudo input. Setting switch 791 and setting confirmation L
In addition to providing the ED792, a microprocessor 74 for always receiving and storing data from the data transmission line 6 is provided, and input data other than the data to be pseudo-input uses the data stored via the data transmission line 6. Therefore,
It is possible to expect excellent effects such as limiting the location of obstacles, improving operability when debugging the actual vehicle, and shortening the time without increasing the size and cost of the node.

〔The invention's effect〕

As described above, according to the present invention, the inspection device with the pseudo signal input function is externally provided, and the receiving and storing means for receiving and storing the data from the data transmission line via the node and the data to be input as the pseudo signal are set. The pseudo data setting means having the pseudo input function and the input data other than the data to be pseudo-input use the data from the data transmission path stored in the data reception storage means via the data transmission path, and are the same as the actual data. Since it is transmitted in the sequence, format, and timing of, the node can be limited in size, the operability at the time of soft debugging (actual vehicle debugging) can be improved, and the time can be shortened without increasing the size and cost of the node.

[Brief description of drawings]

FIG. 1 is a block diagram showing the structure of an inspection device with a pseudo input function and connected nodes according to the present invention, and FIG. 2 is a looped multiple harness system structure in an automobile using the inspection device with a pseudo input function. FIG. 3 is a flowchart showing the outline of the processing flow of the microprocessor incorporated in the inspection device with the pseudo input function. In the figure, 1 to 5 ... nodes, 6 ... data transmission path, 7 ...
Inspection device with pseudo signal input function, 44, 74 ... Microprocessor, 451, 452 ... Selector, 461, 4
62,761 ... Driver, 471,472,771 ...
… Receiver, 791… Pseudo input data setting switch,
792 ... Setting confirmation LED.

Continuation of the front page (51) Int.Cl. ⁵ Identification number Reference number within the agency FI Technical display location // H04L 12/26 (72) Inventor Ryoichi Tsuchiya 3-37-24 Sekizawa, Fujimi City, Saitama Prefecture (72) Invention Person Kazuo Nakamura 3-176-2, Kawayanagi-cho, Koshigaya-shi, Saitama Prefecture (72) Inventor Hayato Muneyuki 3-10-5 Watato, Fujimi-shi, Saitama Prefecture (56) Reference JP-A-57-52291 (JP, A) Actual Kai 57-64952 (JP, U)

Claims (1)

[Claims] 1. A multi-harness system in which a plurality of nodes are connected in a loop by a transmission line, the nodes have no parent-child relationship, are equal, and transmit data cyclically and in a time-division manner according to a fixed node order. In the inspection device with an external pseudo signal input function used by connecting to each of the nodes, the plurality of nodes are configured such that when one node is in a transmission mode, the other nodes are in a relay mode. The inspection device with a signal input function, when the node to which the inspection device with a pseudo signal input function is connected is in the relay mode, a reception storage means for receiving and storing data from the data transmission path via the node, The data processing control means comprises a pseudo data setting means having a pseudo input function for setting data input as a pseudo signal, and the data processing control means. When the pseudo input function of the data setting means is used, the data set by the pseudo data setting means and the data stored in the reception storage means are provided with the pseudo signal input function by the pseudo input setting notification from the pseudo data setting means. A pseudo signal, which is transmitted in the same sequence, format and timing as the actual data to the data transmission line via the node instead of the node in the transmission mode of the node to which the inspection device is connected. Inspection device with input function.