JP3042577B2 - Vehicle monitoring control data transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to supervisory control data for a vehicle, which is divided by the position or function of the supervisory control device of the vehicle and transfers the supervisory control data between the divided units via a multiplex signal line. It relates to a transfer device.

[0002]

2. Description of the Related Art In order to safely and comfortably drive a vehicle, for example, an automobile, a large number of monitoring and control signals are required, and the transfer of these signals is conventionally formed by a wire harness. Was performed by individual signal lines.

[0003] Since wire harnesses differ depending on the type of vehicle, and today the number of constituent signal lines is very large, these devices are divided into a plurality of devices depending on the position and function of the monitoring and control device, and the like. Systems have been developed in which signals are transmitted by individual lines up to the divided units and by multiplex signal lines between units.

FIG. 5 shows an example of a vehicle monitoring and control system, in which vehicle monitoring and control are performed by an engine unit 20A,
Instrument panel unit 20B, console unit 20C,
Right Cowell Unit 20D, Left Cowell Unit 20
E, right door unit 20F, left cowell unit 20
G and the trunk unit 20H are divided into eight units, and data transfer between the units is performed by the multiplex signal line 40.

[0005] Each unit is connected to the monitoring and control equipment in the divided area by an individual signal line. For example, a switch for sounding the horn is connected to the instrument panel unit 20B, while a switch for turning on and off the power supply for sounding the horn is an engine unit. When the horn switch is turned on, the ON signal is sent from the unit 20B to the unit 20A.
It is forwarded to the horn.

As shown in FIG. 6, the frame structure of a signal for transmitting a signal between units is such that a signal SOF indicating the beginning of a frame from the beginning, a signal PRI indicating a data priority, and data are transmitted. A signal DADR indicating a communication partner, a signal SADR indicating a data transmission source,
A data signal DATA to be transferred, a check signal CRC for checking an error in the transferred data, a signal EOD indicating the end of the data, and a response signal RE to the transferred data.
S and a signal EOF indicating the end of the frame. These signals are represented by binary numbers “1” and “0”, and the signals “1” and “0” on the multiplex signal line 40 are represented.
Are distinguished by PWM as shown in FIG.

That is, for one bit length of data,
A one-third-bit-long one voltage is "1",
The one in which a certain voltage is maintained for 2/3 bits is set to "0". When a data transfer request is generated, each unit confirms that the multiplex signal line 40 is in an idle state, that is, that data transfer is not being performed between other units, and transmits the data in the frame configuration shown in FIG. To send to.

Each unit always detects a signal transferred on the multiplex signal line 40, and outputs a DADD of the transferred data.
When the CRC matches OK, the ACK signal indicating normal reception in the bit corresponding to RES is transmitted when the CRC check is OK, and the NAC signal is transmitted when an error is detected in the CRC check. As the ACK signal, the address of the own unit is returned.

[0009] In the unit of the data transfer source, NAC is added to RES.
When the signal is transmitted, the data is retransmitted, and A
This is repeated until CK is returned. In addition, since the multiplex signal line 40 is shared by each unit, data may be sent from a plurality of units to the multiplex signal line 40 at the same time. In this case, the arbitration of which unit is to use the multiplex signal line is performed in a winning system.

That is, as shown in FIG. 8, a signal "1" is transmitted from the unit A (FIG. 8 (A)), and a signal "0" is transmitted from the unit B (FIG. 8 (B)). When,
The multiplex signal line has the signal value shown in FIG. Therefore, each unit monitors the signal value of the multiplex signal line, and stops the transmission of the signal from the own unit when the signal transmitted from the own unit differs from the signal value on the multiplex signal line. That is, in the case of FIG. 8, the unit A stops data transfer.

[0011]

As described above, when such a supervisory control data transfer device is mounted on a vehicle and a test is performed to determine whether or not each device operates normally, a problem arises when the horn is sounded. Test can be performed without any problems.

However, in the test of the equipment, for example,
Some devices, such as a speed-sensitive door lock and a constant-speed traveling device, require vehicle speed data, and these devices were tested by actually running the vehicle. For this reason, the number of man-hours for performing the test is increased, and a long time is required.

An object of the present invention is to provide a vehicle monitoring and control data transfer apparatus improved so that a test that cannot be normally performed can be easily performed.

[0014]

Means to be solved by the present invention will be described with reference to FIG. FIG. 1 is a basic configuration diagram of the present invention. A monitoring and control device is installed and divided by position or function, and in a monitoring and control data transfer device for a vehicle that transfers monitoring and control data through a multiplex signal line between the divided units, the control unit is connected to the multiplex signal line, A test unit (1) for transmitting pseudo data corresponding to output data of a device connected to each unit, and a pseudo data provided in each unit and transferred from the test unit (1) to other units. and a pseudo-data recording means for recording the data (2) for transferring Te <br/> Ru.

The test unit (1) also transfers a flag in addition to the pseudo data, and records the transferred flag in each unit. If the flag is recorded, the pseudo data recording means (2) And a flag determining means (3) for transferring the device output data connected to the unit to another unit when the flag is not recorded.

The pseudo data transmitted from the test unit (1) is speed data of a vehicle.

[0017]

A device for transmitting an input signal from the test unit 1 to the monitoring and control device for performing a test is connected to transmit pseudo output data to the unit. In the unit to which the pseudo data has been transferred from the test unit 1, the transferred pseudo data is recorded in the pseudo data recording means 2.

The pseudo data recorded in the pseudo data recording means 2 is transferred to another unit connected to the device to be tested to perform the test. In addition, the test unit 1 sends pseudo data and sends a flag. The flag determination means 3 of each unit records when the flag is transferred from the test unit 1, and records the data recorded in the pseudo data recording means 2 when the flag is recorded, and records the flag when the flag is recorded. If not, the device output data connected to the unit is transferred to another unit.

The test unit 1 sends pseudo speed data to a unit to which a device for calculating the speed of the vehicle is connected. In the unit to which the speed calculating device is connected, the speed data transferred from the test unit 1 is recorded in the pseudo-recording means 2, and a request from another unit and, if necessary, the speed data from the own unit to the other unit. Is transferred, the speed data recorded in the pseudo data recording means 2 is transferred.

As described above, the pseudo data is transmitted from the test unit in response to the test, the unit to which the pseudo data is transferred records the transferred data, and the recorded data is transmitted to other units as test data. Since the transfer is performed, the test can be performed indirectly without directly operating the equipment of the vehicle.

Since the test unit also transfers and records the flag, the pseudo data is transferred to another unit when the flag is recorded, and the actual data is transferred to another unit when the flag is not recorded. The device can be easily separated when a failure occurs.

Further, since the speed data is transmitted from the test unit and recorded, and the recorded data is transferred to another unit, a test similar to that during traveling can be performed without traveling the vehicle.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. 2 is a configuration diagram of an embodiment of the present invention, FIG. 3 is an operation flowchart of the test unit of the embodiment, and FIG. 4 is an operation flowchart of each unit of the embodiment.

In FIG. 2, reference numeral 10 denotes a test unit;
0 is a unit representing a plurality of units, and 40 is a multiplex signal line for transferring data between the units. The test unit 10 is connected to the multiplex signal line 40 when performing a test, but may be connected at all times and installed in a place where a person cannot easily operate.

The test unit 10 includes an input unit 11, a recording unit 12, a transmission control unit 13, a reception control unit 14, an interface ( I / O ) 15, and a processor (CPU) 16 for performing processing. The unit 20 includes a recording unit 21, a flag determination unit 22, a pseudo data recording unit 23,
It comprises a transmission control unit 24, a reception control unit 25, a control unit 26, interfaces ( I / O ) 27 and 28, and a processor (CPU) 29 for performing processing.

The monitoring and control equipment connected to the unit 20
The connection is made via the I / O 30, and the transfer data to another unit is recorded in the recording unit 21. First, referring to FIG.
The operation of the test unit 10 will be described. In process S1,
The pseudo flag F is input from the input unit 11, and then the process S2
The process proceeds to step S3, where the destination address is input. Then, the process proceeds to step S3 where data is input and recorded in the recording unit 12.

That is, in the process S2, the DADR which is the transfer destination unit described with reference to FIG.
Then, data corresponding to DATA is input. DATA
For example, if the data to be transferred is speed data, an ID indicating that the data is speed data and a speed value are input.

In step S4, the transmission control unit 13 reads out the data recorded in the recording unit 12 according to a command from the input unit 11, and performs I / O according to the format shown in FIG.
A signal is transmitted to the multiplex signal line 40 via O16. In the process S5, the reception control unit 14 determines whether or not the ACK has been transferred to the RES described with reference to FIG. 6, and if the ACK has not been transferred, the process proceeds to the process S4 and the processes S4 and S5 are repeated.

In the process S6, when the pseudo data is further transferred, the process shifts to the process S1 and the processes S1 to S6 are repeated. When the transfer of the pseudo data is completed, the pseudo data is transferred between the units and the test is started.

When the test is completed, the process proceeds to step S7 where the pseudo flag F reset is input from the input unit 11 and is transmitted from the transmission control unit 13 to the unit. In step S8, the reception control unit 14 determines whether an ACK has been transferred from the unit, and retransmits the flag reset if the ACK has not been transferred. If the ACK has been transferred, the process ends.

In the embodiment, the pseudo flag F input in the process S1 and the data input in the process S3 are both transmitted in the process S4. May be. Next, the operation of the unit will be described with reference to FIG.

In step S11, the control section 29 determines whether or not data transfer from the own unit to another unit has occurred. If the determination is YES, the control section 29 proceeds to step S21.
In the case of, the process proceeds to step S12. That is, the control unit 29
As will be described later in step S17, when there is a data transfer request from another unit, the I / O 3
When the data is transferred from a predetermined device connected via the “0”, it is determined whether or not the data transfer has occurred in accordance with a predetermined rule of whether or not to transfer the data to another unit.

In step S12, the reception control unit 25 sets the I / O
Through O 31 determines whether data to Jiyu knit came transferred, if the determination is NO, the process goes to S11, in the case of YES proceeds to processing S13. That is, in the process S12, it is determined whether or not the DADR described with reference to FIG. 6 is data that matches the address number of the own unit.

In step S13, the reception control unit 25 determines whether there is an error in the transferred data.
In the case of S, the process proceeds to step S14 to transmit NAC, and in the case of NO, the process proceeds to step S15 to transmit ACK. That is, the reception control unit 25 transmits the transfer data described in FIG.
Check with RC whether there is an error or not, if there is an error, NAC to RES, and if there is no error, ACK
To transfer.

In step S16, the control unit 26 determines whether the transferred data is transfer data from another unit, a flag and pseudo data from a test unit,
Alternatively, it is determined whether the command is a flag reset command. If the data is from another unit, the process proceeds to step S17. If the flag and the pseudo data are from the test unit, the process proceeds to step S18.

In step S17, the control unit 25 records the transferred data in the recording unit 21 and decodes the data. If the data is a data transfer request, the control unit 25 causes data transfer in step S11. I / O
27, the data transferred to the device connected thereto is retransmitted.

In step S18, the flag determination unit 22 records a flag in a memory (not shown), and in step S19, records the pseudo data from the test unit transferred in the pseudo data recording unit 23. In the process S20, the flag determination unit 22 resets the flag recorded in the memory (not shown) in the process S18 according to the flag reset command transferred from the test unit.

In the process S21, the flag determination unit 22 determines whether or not a flag is set in the data to be transferred to another unit by referring to a memory storing a flag (not shown). The process proceeds to step S22, and if NO, the process proceeds to step S23.

In step S22, the transmission control unit 24 reads the data recorded in the recording unit 21 and transfers the data to another unit. In the process S23, the transmission control unit 2
Reference numeral 4 reads the pseudo data recorded in the pseudo data recording unit 23 according to a command from the flag determination unit 22 and transfers the data to another unit.

In step S24, the reception control unit 25 determines whether or not ACK has been transferred from the transfer destination unit to the data transferred in steps S22 and S23.
Is not transferred, the process proceeds to step S21 and re-transfers.
If CK has been transferred, the process proceeds to step S11.

In this embodiment, steps S18 and S19
To record the flag and pseudo data,
As described above, when the flag and the pseudo data are separately transferred from the test unit, each of them may be recorded after determining whether the data is the flag or the pseudo data.

The data transmitted from the test unit may be data such as an octopus or a gauge in addition to the speed data described above. Also, the connected device and I
When a test is performed on how the monitoring and control device operates when noise is mixed in the connection line between / O and the connection line, data corresponding to the test may be transmitted.

[0043]

As described above, according to the present invention, the following effects can be obtained. Since the pseudo data is transmitted from the test unit in response to the test, the unit to which the pseudo data is transferred records the transferred data, and the recorded data is transferred to another unit as test data.
The test can be performed indirectly without directly operating the vehicle equipment.

Further, since the test unit also transfers and records the flag, the pseudo data is transferred to another unit when the flag is recorded, and the actual data is transferred to another unit when the flag is not recorded. The device can be easily separated when a failure occurs.

Further, since the speed data is transmitted from the test unit and recorded, and the recorded data is transferred to another unit, the same test as when the vehicle is running can be performed without running the vehicle.

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram of the present invention.

FIG. 2 is a configuration diagram of an embodiment of the present invention.

FIG. 3 is an operation flowchart of the test unit of the embodiment.

FIG. 4 is an operation flowchart of each unit of the embodiment.

FIG. 5 is a system configuration diagram of the present invention and a conventional example.

FIG. 6 is a diagram illustrating a frame configuration example of a signal transferred via a multiplex signal line.

FIG. 7 is a diagram illustrating data 1 and 0 on a multiplex signal line.

FIG. 8 is a diagram illustrating arbitration of data transmission on a multiplex signal line.

[Explanation of symbols]

1, 10 test unit 2 pseudo data recording means 3 flag determination means 11 input unit 12, 21 recording unit 13, 24 transmission control unit 14, 25 reception control unit 15, 27, 28 interface ( I / O ) 16, 29 processor ( CPU) 22 flag determination unit 23 pseudo data recording unit 26 control unit

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G05B 23/02 B60R 6/02 G01M 17/007

Claims (2)

(57) [Claims] 1. A supervisory control data transfer device for a vehicle in which a supervisory control device is installed and divided by position or function, and transmits supervisory control data between the divided units via a multiplex signal line, And a test unit for transmitting pseudo data corresponding to output data of a device connected to each unit, and pseudo data provided in each unit and transferred from the test unit to other units. and a pseudo-data recording means for recording the data to be transferred, even flag added from the test unit to the pseudo data transfer
Is sent, the each unit, and recording the transferred flag off
If the lag is recorded, the pseudo data recording means
If the recorded data is not flagged,
The output data of the device connected to the unit.
A vehicle monitoring and control data transfer device, comprising: a flag determination unit that transfers the data to a vehicle. 2. A pseudo data transmitted from the test unit.
2. The vehicle monitoring control data transfer device according to claim 1, wherein the data is vehicle speed data .