JPH06153270A - Electronic circuit device - Google Patents

Abstract

PURPOSE:To obtain the electronic circuit device in which number of connector terminals and number of wires of harness are reduced. CONSTITUTION:The electronic circuit device is provided with an output section 50 having various actuators 61-64 and various sensors 51-54 provided to a vehicle and with a control section 9 in which a mother board 12 is provided various control units 21-24 controlling the actuators 61-64 based on a detection signal outputted from the various sensors 51-54, and the output section 50 and the control section 9 are electrically connected by a vehicle harness 17, and also with multiplexer means 56, 57, 36, 21e-24e multiplexing either the detection signal or the output signal outputted from the various control units 21-24 and sending/receiving the multiplexed signal through the vehicle harness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises an output section provided in a vehicle with various output devices and various sensors, and a control section provided with various control units for controlling the output devices. The present invention relates to an electronic circuit device.

[0002]

2. Description of the Related Art Vehicles are equipped with, for example, an air conditioning control unit for controlling the air conditioning of a passenger compartment, an anti-skid control unit for preventing wheel slip, an airbag control unit for inflating an airbag in the event of a collision, and a speed. A constant speed traveling control unit for controlling to a desired speed and various other control units are provided. These units are arranged in the engine room, instrument panel, rear parcel and other vehicle spaces. Then, these units are connected to various sensors and actuators by a harness, and these actuators are controlled by respective control units based on the output of each sensor or the like.

[0003]

By the way, the respective control units are independently arranged in separate spaces, and as shown in FIG. 6, the respective control units 1, 2 ... Are respectively harnesses 3, 3. Actuator
In order to connect (not shown) and sensors (not shown), there are many harnesses 3, 3 ... that can be passed through the vehicle. Furthermore, each control unit 1, 2 ... Is mounted on the vehicle by brackets 4, 4 ,. There are also a large number of 4, 4, ... Therefore, there is a problem that the bracket 4 causes an increase in weight, and that the work of mounting the harness 3 and the bracket 4 is heavy.

Therefore, each control unit 1, 2 ...
There has been proposed an electronic circuit device in which the above is provided on one motherboard to solve the above problem.

However, since the control units 1, 2, ... Are provided on one motherboard, the number of terminals of the connector for connecting the harness to the motherboard increases. Therefore, the connector itself becomes large, and
Although the number of harnesses 3 itself decreases, the number of wires that make up the harness increases accordingly, making it difficult to bend the harness, and as a result, wiring of the harness becomes difficult. .

The present invention has been made in view of the above problems, and an object thereof is to provide an electronic circuit device capable of reducing the number of terminals of a connector and the number of wires of a harness.

[0007]

In order to achieve the above-mentioned object, the present invention provides an output unit provided in a vehicle with various output devices and various sensors, and a detection signal output from the various sensors. An electronic circuit device comprising: a control unit having various control units for respectively controlling the output devices based on one motherboard, the control unit electrically connecting the output unit and the control unit with a vehicle harness. It is characterized in that a signal multiplexing means for multiplexing at least one of the detection signal and the output signal output from the various control units and transmitting and receiving the signal via the vehicle harness is provided.

[0008]

According to the present invention, there is provided the signal multiplexing means for multiplexing at least one of the detection signal and the output signal output from the various control units and transmitting / receiving the signal via the vehicle harness. , It is possible to reduce the number of connector terminals and the number of harnesses.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of an electronic circuit device according to the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 10 is a mother unit of an electronic circuit device, and the mother unit 10 has a case 11 and a mother board 12 provided in the case. The mother unit 10 is arranged in the control section 9 (see FIG. 4) such as an instrument panel.

The upper surface 11a of the case 11 has a mounting hole 13
16 are formed, and the control units 21 to 24 can be inserted into the mounting holes 13 to 16. A connector 18 connected to the harness 17 is attached to the side surface 11b of the case 11. This harness 1
Reference numeral 7 electrically connects the control unit 9 and the output unit 50 (see FIG. 4).

A bracket 19 is attached to the bottom of the case 11 so that the case 11 can be fixed to the vehicle body.

1 and 2, the mounting holes 13-1
6 and control units 21-24 are each 4
Although only one is shown, it is provided in addition to this and is omitted for convenience of description.

The motherboard 12 has mounting holes 13-1.
6, connectors 31 to 34 are provided at positions facing each other, and these connectors 31 to 34 have a plurality of connection pins 31.
a-31c ...- 34a-34d ... are erected.

As shown in FIG. 3, the motherboard 12 has a power supply circuit 35 for supplying electric power to the control units 21 to 24, etc., and an input terminal T of the connector 18.
A timing receiving circuit 36 for inputting a timing signal via 2 and an input signal processing circuit 37 for processing a speed signal (detection signal) G1 detected by a vehicle speed sensor 51 (see FIG. 4).
A clock circuit 38 for outputting a clock signal for each control unit 21-24, a memory 39 for storing data, a fail-safe circuit 41 for preventing runaway of the CPU of each unit 21-24, and the like are provided. There is.

The input terminal T1 of the connector 18 is connected to the connection pins 31a to 34a of the connectors 31 to 34, and the output terminals 36a to 36d of the timing receiving circuit 36 are connected to the connector 3.
It is connected to the connection pins 31b-34b of 1-34. The output terminal 36e is connected to the input signal processing circuit 37.
Then, the timing receiving circuit 36 sequentially outputs the timing signal from the output terminals 36a to 36e in order every time the timing signal is input.

The output terminals Q1 to Q4 of the connector 18 are connected to the connection pins 31c to 33c and 34d of the connectors 31 to 34, respectively.

The control unit 21 includes a case 21.
A board 21b provided in a is provided with, for example, an air conditioning control circuit 21c including a CPU that controls air conditioning of a vehicle compartment, a gate circuit 21e, and a signal processing circuit 21f that processes a signal output from the gate circuit 21e. Further, a female connector 21d for detachably inserting the connection pins 31a to 31c is attached to the board 21b. The gate circuit 21e opens its gate only while the timing signal is being output from the output terminal 36a of the timing receiving circuit 36, and inputs the detection signal input to the input terminal T1 to the signal processing circuit 21f.

When the case 21a is inserted into the mounting hole 13 and the connecting pins 31a to 31c are inserted into the female connector 21f to mount the control unit 21 on the motherboard 12, the signal processing circuit 21e causes the gate circuit 21e,
It is connected to the input terminal T1 via the connection pin 31a, and the air conditioning control circuit 21c is connected to the output terminal Q1 via the connection pin 31c.

The control unit 22 includes a case 22.
An anti-skid control circuit 22c including a CPU or the like for preventing wheel slip, for example, is provided on a board 22b provided in a,
A gate circuit 22e and a signal processing circuit 22f for processing a signal output from the gate circuit 22e are provided, and a female connector 22d for detachably inserting the connection pins 32a to 32c is attached to the board 22b. .
The gate circuit 22e has its gate opened only while the timing signal is output from the output terminal 36b of the timing receiving circuit 36, and inputs the detection signal input to the input terminal T1 to the signal processing circuit 22f.

When the case 22a is inserted into the mounting hole 14 and the connecting pins 32a to 32c are inserted into the female connector 22d to mount the control unit 22 on the motherboard 12, the signal processing circuit 22f causes the gate circuit 22e,
It is connected to the input terminal T1 via the connecting pin 32a, and the anti-skid control circuit 22c is connected to the output terminal Q2 via the connecting pin 32c.

The control unit 23 includes a case 23.
Output from the air bag control circuit 23c including a CPU for inflating an air bag (not shown) only in the case of a vehicle collision, the gate circuit 23e, and the gate circuit 23e to the board 23b provided in the a. And a signal processing circuit 23f for processing a signal to be provided, and a connecting pin 33a on the board 23b.
It is configured by attaching a female connector 23d for removably inserting ~ 33c. The gate circuit 23e opens its gate only while the timing signal is being output from the output terminal 36c of the timing receiving circuit 36, and inputs the detection signal input to the input terminal T1 to the signal processing circuit 23f.

When the case 23a is inserted into the mounting hole 15 and the connecting pins 33a to 33c are inserted into the female connector 23d to mount the control unit 22 on the motherboard 12, the signal processing circuit 23f causes the gate circuit 23e,
The airbag control circuit 23c is connected to the input terminal T1 via the connection pin 33a, and the air bag control circuit 23c outputs the output terminal Q via the connection pin 33c.
Connected to 3.

The control unit 24 is a case 24.
a constant speed traveling control circuit 24c including a CPU or the like for controlling the speed of the vehicle to a predetermined speed on a board 24b provided in a;
A gate circuit 24e and a signal processing circuit 24f for processing a signal output from the gate circuit 24e are provided, and a female connector 24d for detachably inserting the connection pins 34a to 34d into the board 24b is attached. .
The gate circuit 24e has its gate opened only while the timing signal is being output from the output terminal 36d of the timing receiving circuit 36, and the detection signal input to the input terminal T1 is input to the signal processing circuit 24f.

When the case 24a is inserted into the mounting hole 16 and the connecting pins 34a to 34d are inserted into the female connector 24d to mount the control unit 24 on the motherboard 12, the signal processing circuit 24f causes the gate circuit 24e,
The constant speed running control circuit 24c is connected to the input terminal T1 via the connection pin 34a, and the constant speed running control circuit 24c outputs the output terminal Q4 via the connection pin 34d.
Connected to.

The memory 39 is used by the control unit 21.
Required temperature in the vehicle compartment, temperature data detected by the temperature sensor, set traveling speed required by the control unit 24, speed data detected by the vehicle speed sensor, data required by other control units, etc. Is to remember.

By the way, the input signal processing circuit 37, the clock circuit 38, the memory 39, the fail safe circuit 41, etc.
Since it is provided on one mother board 12 and shared by the respective control units 21 to 24 and other control units, the overall circuit configuration is simplified.

Further, various control units 21 to 24 for controlling various actuators are respectively connected to a plurality of connectors 31 to 34 provided on one motherboard 12.
Motherboard 1 because it is detachably attached
Only one bracket 19 is required to attach 2 to the vehicle body. Since it is only necessary to connect the motherboard 12 to various actuators and various sensors with the harness 17, the number of harnesses 17 can be reduced, and the burden of the work of mounting the motherboard 12 and the harness can be considerably reduced. Become.

The output unit 50, as shown in FIG. 4, includes a temperature sensor 51 for detecting the temperature of the passenger compartment, a wheel rotation sensor 52 for detecting the wheel rotation speed, and a collision sensor 53 for detecting a vehicle collision. , An accelerator opening sensor 54 for detecting an accelerator opening, a vehicle speed sensor 55 for detecting a vehicle speed, a timing circuit 56 for outputting a timing signal at every predetermined cycle, and a detection signal output from each of the sensors 51 to 55. G
The transmission circuit 57 sequentially outputs 1 to G5 each time the timing signal is output.

The output section 50 includes an air conditioning actuator (output device) 61 and the air conditioning actuator 61.
A driver 71 for operating the anti-skid actuator (output device) 62, a driver 72 for operating the anti-skid actuator 62, an airbag module (output device) 63, and an inflator of the airbag module 63 (see FIG. It has a driver 73 for supplying a current to (not shown), an accelerator opening actuator (output device) 64, a driver 74 for operating the accelerator opening actuator 64, and the like.

Then, the timing circuit 56 and the transmission circuit 5
7, timing receiving circuit 36, and gate circuits 21e to 24e
And form signal multiplexing means for multiplexing signals to transmit and receive signals.

Next, the operation of the electronic circuit device of the above embodiment will be described with reference to the time chart shown in FIG.

When the detection signals G1 to G5 are output from the respective sensors 51 to 55 of the output section 50 and the timing signal P is output from the timing circuit 56 at predetermined intervals, the transmission circuit 5
7 is a detection signal G1 ~ every time the timing signal P is output.
G5 is output sequentially. The detection signals G1 to G5 are supplied to the control unit 9 via the input signal line 17a of the harness 17.
Input to the input terminal T1 of the connector 18. On the other hand,
The timing signal P output from the timing circuit 56 is input to the timing receiving circuit 36 via the signal line 17b of the harness 17 and the input terminal T2 of the connector 18.

The timing receiving circuit 36 switches the output terminals 36a to 36e each time the timing signal P is input and sequentially outputs the timing signal P from the output terminals 36a to 36e. When the timing signal P is output from the output terminal 36a, the gate circuit 2 of the control unit 21
1e is opened (the other gate circuits 22e to 24e are closed), and the detection signal G1 input to the input terminal T1 of the connector 18 is the signal processing circuit 2 of the control unit 21.
Input in 1f. Then, the air conditioning control circuit 21c outputs a control signal S1 for controlling the air conditioning actuator 61 based on the detection signal G1.

The control signal S1 is input to the driver 71 of the output section 50 through the connection pin 31c, the output terminal Q1 of the connector 18 and the output signal line 17c of the harness 17. Then, the driver 71 operates the air conditioning actuator 61 by the control signal S1.

Similarly, when the timing signals P are sequentially output from the output terminals 36b to 36d of the timing receiving circuit 36, the gate circuits 22e to 24e are sequentially opened, and the detection signal G2 to the input terminal T1. G4 is input to each of the signal processing circuits 22f to 24f. And the detection signal G
The control signal S for controlling the anti-skid actuator 62 and the air bag module 63 by the anti-skid control circuit 22c and the air bag control circuit 23c based on 2, G3.
Output 2, S3.

The control signals S2 and S3 are transmitted to the connection pins 32c,
33c, the output terminals Q2, Q3 of the connector 18 and the output signal lines 17d, 17e of the harness 17 are input to the drivers 72, 73 of the output section 50. And the driver 72,
Reference numeral 73 operates the anti-skid actuator 62 and the air bag module 63 according to the control signals S2 and S3.

Output terminal 36e of the timing receiving circuit 36
When the timing signal P is output from the input signal processing circuit 37, the input signal processing circuit 37 processes the detection signal G5 input to the input terminal T1. The processed detection signal G5 is input to the constant speed traveling control circuit 24c. Then, the constant speed traveling control circuit 24c
A control signal S4 for controlling the vehicle speed to a constant speed is output based on the detection signals G4 and G5.

The control signal S4 is input to the driver 74 of the output section 50 via the connection pin 34d, the output terminal Q4 of the connector 18 and the output signal line 17f of the harness 17. Then, the driver 74 operates the accelerator opening actuator 64 by the control signal S4.

As described above, the detection signals G1 to G5 are sequentially output each time the timing signal P is output by the transmission circuit 57, and the detection signals G1 to G5 sequentially input to the input terminal T1 are received by the timing reception circuit 36. And gate circuit 21
e to 24e and signal processing circuits 21f to 2 respectively
Since the signal is input to 4f, the number of signal lines of the harness 17 can be small, and as a result, the number of terminals T of the connector 18 can be reduced, and the connector 18 can be small.

In the above embodiment, the detection signals are multiplexed to reduce the number of input signal lines, but the control signals S1 to S4 may be multiplexed to reduce the number of output signal lines 17c to 17f. Further, it goes without saying that both signals may be multiplexed to reduce the number of respective signal lines.

[0042]

According to the present invention, at least one of the detection signals output from various sensors and the output signals output from various control units is multiplexed to transmit and receive signals via the vehicle harness. The number of terminals of the connector and the number of wires of the harness can be reduced because the multiplexing means is provided.

[Brief description of drawings]

FIG. 1 is a perspective view showing an appearance of a mother unit according to the present invention,

FIG. 2 is a sectional view showing the configuration of a mother unit according to the present invention,

FIG. 3 is a block diagram showing a configuration when each control unit is mounted on a motherboard,

FIG. 4 is a block diagram showing a configuration of an output unit according to the present invention,

FIG. 5 is a time chart showing a timing chart of operations of main circuits,

FIG. 6 is a perspective view for explaining a mounting state of a conventional control unit.

[Explanation of symbols]

 9 Control part 12 Motherboard 17 Harness 21-24 Control unit 21e-24e Gate circuit 36 Timing receiving circuit 50 Output part 51-54 Sensor 56 Timing circuit 57 Transmission circuit 61-64 Actuator (output device)

Claims (1)

[Claims] 1. An output section having various output devices and various sensors provided in a vehicle, and various control units for respectively controlling the output devices based on detection signals output from the various sensors. An electronic circuit device comprising a control unit provided on one motherboard and electrically connecting the output unit and the control unit with a vehicle harness, wherein the detection signal and the output signal output from the various control units are An electronic circuit device comprising a signal multiplexing means for multiplexing at least one of them and transmitting / receiving a signal via the vehicle harness.