JP2002331883A - Auxiliary functional mode control device of electronic circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem wherein a door switch turned on and off in opening and closing a door is turned on in a designated mode for instance twice for two seconds within on-state designated time of an ignition switch to thereby switch a diagnosing circuit to a failure diagnosis mode, resulting in causing a difference in interval of twice on-state of the ignition switch so that the operation is difficult. SOLUTION: In this control device having a micro-computer, it enters a lighting display mode for lighting a display device for designated time immediately after the on operation of a power switch, and then it enters the control mode from the display mode to create a control signal according to an input signal. The micro-computer turns on and off the power switch designated number of times according to lighting of the display device immediately after the on-operation of the power switch to enter an auxiliary functional mode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic control circuit, and more particularly to an electronic control circuit in which an indicator light is turned on when an ignition switch (power switch) is turned on. When entering, the electronic circuit is put into the auxiliary function mode by turning on and off the ignition switch according to the blinking, so that special operations such as failure reading and ID setting can be performed. is there.

[0002]

2. Description of the Related Art An occupant protection device described in Japanese Utility Model Publication No. 6-11252 is one example of a conventional control device of this type, which will be described below with reference to FIG.

A door is opened between the diagnostic circuit 3 and the ground.
A door switch 24, which is turned on and off when the door is closed, is connected.
The lamp drive circuit 25 is connected to the positive electrode of the vehicle-mounted battery 1 via the notification section 23 and the contact (normally open) 26a of the relay 26 in series. Thereby,
When the ignition switch 2 is ON, the diagnostic circuit 3 always diagnoses a failure at each point in the normal mode.

The OF of the ignition switch 2
By repeating ON / OFF of the door switch 24 in the predetermined mode at the time of F, the diagnostic circuit 3 is set to the detailed diagnostic mode, the detailed diagnostic mode is entered, and the notification unit 23 blinks to notify the diagnostic result.

[0005]

However, in the occupant protection device described above, the ignition switch 2
By turning on the door switch 24 that is turned on and off when the door is opened and closed when the door is turned off, for example, twice in two seconds, the door switch 24 is turned on for two seconds to switch the diagnostic circuit 3 to the failure diagnosis mode. Twice at regular intervals
N has to be performed, and there is a problem that operation is difficult.

The present invention has been made in view of the above-described problems. The notification unit is intermittently driven in a predetermined pattern, and the ignition switch is turned on in accordance with the intermittent drive.
It is an object to enter the auxiliary function mode by operating N and OFF.

[0007]

According to a first aspect of the present invention, an electronic circuit is provided in which an indicator lamp flashes after a power switch is turned on, and the power switch is turned on and off a predetermined number of times in accordance with a flashing mode during the operation. Is an auxiliary function mode control device for an electronic circuit, wherein the device enters an auxiliary function mode.

According to a second aspect of the present invention, there is provided the electronic circuit auxiliary function mode control device according to claim 1, wherein the auxiliary function is a failure record display mode of the vehicle airbag control electronic circuit.

A third aspect of the present invention is the auxiliary function mode control device for an electronic circuit according to claim 1, wherein the auxiliary function is an ID setting mode of the keyless door lock device.

[0010]

Next, an embodiment according to the present invention will be described. Embodiment 1 FIG. The configuration of the first embodiment according to the present invention will be described with reference to FIG. In the present embodiment, an electronic circuit is applied to a vehicle occupant protection device. In FIG. 1, when the ignition switch 32 is turned on (rotation operation from the ACC position to the ON position), the vehicle-mounted battery 3 is turned on.
1 is supplied to the circuit constant voltage circuit 35 via the power supply relay 33 and the first backflow prevention diode 34 and the DC / DC
The constant voltage Vcc is supplied to the converter 36 and further supplied from the circuit constant voltage circuit 35 to a microcomputer (CPU) 37, which will be described later, and the microcomputer 37 supplies a low level signal to the drive transistor 45. , to turn off the driving transistor 45 monitors with the (notification unit) 46 for a predetermined time T ₀ turned on to inform the driver that the monitor 46 is operating normally by the lighting. The DC / DC converter 36 performs a boosting operation based on a clock pulse supplied from a microcomputer 37 described later, and charges the backup capacitor 39 with the output voltage.

On the other hand, the microcomputer 37 has:
Acceleration signal (detection signal) detected by acceleration sensor 40
When the microcomputer 37 determines that a collision accident has occurred based on the input acceleration signal, the microcomputer 37 turns on the switch circuit 41 and charges the backup capacitor 39 in the detonator 42 to be controlled. And the airbag is deployed to drive the airbag (at this time, naturally, the safety switch 43 is turned on).

Further, the microcomputer 37 comprises:
When the ignition switch 32 is in the OFF position or ACC
When an OFF operation (or a disconnection that is in an electrically equivalent state) is performed by a rotation operation to a position, the switch circuit 48 is turned on by a comparison circuit 47 connected to the monitor resistor 44. Then, the power charged in the backup capacitor 39 is returned to the input side of the DC / DC converter 36 and the constant voltage circuit 35, and the microcomputer 37 is operated for a predetermined time. In this manner, the microcomputer 37 continues to execute the auxiliary function mode (diagnosis function) and the like while the power is secured by the backup capacitor 39, but when the charging power of the backup capacitor 39 becomes equal to or less than the specified value. , The microcomputer 37 becomes inoperable. As a result, the microcomputer 37 stops operating. As described above, during normal operation, the microcomputer 39 always enters the auxiliary function mode by turning off the ignition switch 32 as described above, and performs various failure diagnoses.

Next, how to enter the diagnostic function (auxiliary function mode) of the macro computer 37 at the time of maintenance with a derailleur or the like will be described with reference to FIGS. 2 and 3. by the switch 32 turned on, by rotating from the ACC position to the oN position, the monitor 46 is a predetermined time T ₀ lit, if it is off, the ignition switch 3 accordingly
2 is returned from the ON position to the ACC position by the OFF operation, and then, when the monitor 46 is turned on, the operation of turning on the ignition switch 32 is repeated three times in succession as shown in FIG. As a result, the device enters the auxiliary function mode, and then escapes by turning off. When the microcomputer 37 is in the auxiliary function mode, the monitor 46 is notified by blinking.

In the following, this will be described in detail. First, when the ignition switch 32 is turned on, the microcomputer 37 starts operating and proceeds to step ST100.
From the monitor resistor 44
The output voltage of the on-vehicle battery 31 is divided by a resistor and supplied to the microcomputer 37. The microcomputer 37 calculates the voltage based on the supply voltage value.
It is determined that the ignition switch 32 is turned from the “ACC position” to the “ON position” and is turned on (step ST110), and a predetermined time T ₀ immediately after the ON operation is performed.
Only during this time, the microcomputer 37 turns off the drive transistor 45 and turns on a monitor 46 such as a lamp provided on a meter panel (not shown) of the vehicle (FIG. 2B).
However, after the elapse of the predetermined time T ₀ , the drive transistor 45 is turned on by the microcomputer 37, and the monitor 46 is turned off (step ST12).
0), the ignition switch 32 is turned from the ON position to ACC in accordance with the timing (at the point P in FIG. 2).
The switching rotation operation is performed to the position, but the step ST
If it is determined in 130 that this rotation operation has not been performed, the process proceeds to step ST140 and ends.

On the other hand, if it is determined in step ST130 that the rotation operation has been performed, the process proceeds to step ST140, and it is determined whether or not the total number of lightings of the monitor 46 up to the present time has reached a predetermined number, for example, three times. In the case of the first to third times, the process returns to step ST110, but in the case of the fourth time, the process proceeds to step ST160 to enter the auxiliary function mode as a diagnostic function (step ST150), and the monitor 46 is turned on for a short time. Blinks at time (<T ₀ ) to notify the operator that the auxiliary function mode has been entered. When the ignition switch 32 is thereafter returned from the ON position to the ACC position, the process proceeds to step ST160 and ends.

In step ST150, when entering the auxiliary function mode, the microcomputer 37
Since the failure data, the development data, and the like stored in the EPROM 49 are sequentially read and the read results are output from terminals (not shown), a person such as a vehicle manufacturer or a dealer connects the display device or the like to the microcomputer 37 by The failure data, deployment data, and the like can be sequentially known.

When the ignition switch 32 is turned off at the time of entering the auxiliary function mode as described above, the microcomputer 37 sets the ignition switch 32 to OFF when the monitor lamp 46 is turned off for a predetermined time, for example, within one second. Although the setting is made so as to recognize that the switch has been turned off, the allowable range of the delay time is determined experimentally, and is set so as not to hinder the switch operation of ordinary people.

Embodiment 2 FIG. In this embodiment, the present invention is applied to a chassis controller such as an anti-skid controller and a suspension controller for a vehicle, and the configuration thereof is shown in FIG. 4, and is the same as that already described in FIG. Like or equivalent parts are denoted by the same reference numerals, and detailed description thereof will be omitted. Hereinafter, different parts will be described. In FIG. 4, a microcomputer denoted by reference numeral 50 is a rotation sensor 51,
In response to the supply of a signal from the vehicle speed sensor 52, a control signal is generated for a load 53 which is an actuator. The microcomputer 50 performs failure diagnosis of the rotation sensor 51, the vehicle speed sensor 52, the load 53, and the like, and when a failure is found, turns on the monitor lamp 46 via the drive transistor 45 to notify the user. The failure diagnosis is performed by switching the ignition switch 32 from the OFF position to the ACC position or performing a moving operation, as in the first embodiment.
Can be repeatedly turned on and off a predetermined number of times in a predetermined cycle. By turning on and off the ignition switch 32 in accordance with the turning on and off, it is possible to enter the auxiliary function mode which is a diagnostic mode.

Embodiment 3 In the above embodiment, the failure diagnosis is performed in the auxiliary function mode. However, the auxiliary function mode may be used as the ID setting of the keyless door lock device. In this case, the monitor 46 flashes after the mode ignition switch 32 is turned on, and the microcomputer 37 is switched to the ID setting function by turning on and off the ignition switch 32 a predetermined number of times in accordance with the flashing mode during the operation. The ID code of the keyless door lock device may be registered in a memory (not shown) via the microcomputer 37 by using the means described above.

[0020]

As described above, according to the present invention, a special circuit for monitoring is replaced by another accessory circuit, so that the cost can be reduced without newly connecting this special circuit. be able to.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram of an occupant protection device according to a first embodiment of the present invention.

FIG. 2 is a timing chart for explaining a circuit operation of a main part in the present invention.

FIG. 3 is a flowchart illustrating a diagnostic function of the microcomputer according to the present invention.

FIG. 4 is a circuit block diagram of a chassis controller (for example, a suspension controller, an anti-skid controller, and the like) showing the second embodiment of the present invention.

FIG. 5 is a circuit block diagram of a conventional occupant protection device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 31 In-vehicle battery 2, 32 Ignition switch 3 Diagnostic circuit 4, 49 Storage unit 23 Notification unit 24 Door switch 25 Lamp drive circuit 26 Relay 26a Contact 33 Power supply relay 34 Backflow prevention diode 35 Circuit constant voltage circuit 36 DC / DC converter 37 Microcomputer (CPU) 39 Backup capacitor 41 Switch circuit 42 Squib 44 Monitor resistance 46 Monitor lamp 47 Comparison circuit 48 Switch circuit

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kunihiro Kaneko 5-24-15 Minamidai, Nakano-ku, Tokyo Inside Calso Nic Kansei Corporation (72) Inventor Takayuki Kishi 5-24-15 Minamidai, Nakano-ku, Tokyo Calso Inside Nick Kansei Corporation (72) Inventor Ryuichi Asada 5-24-15 Minamidai, Nakano-ku, Tokyo Calso Inside Nickcal Kansei Corporation (72) Inventor Mineyuki Oishi 5-24-15 Minamidai, Nakano-ku, Tokyo Calso Nick Kansei F term in reference (reference) 2E250 AA21 BB08 BB32 CC12 DD06 EE02 FF35 GG05 GG15 HH01 JJ03 KK03 LL01 SS04 3D054 EE39 FF16

Claims (3)

[Claims] An electronic circuit enters an auxiliary function mode by turning on and off the power switch a predetermined number of times in accordance with a flashing mode during the flashing mode after the power switch is turned on. Auxiliary function mode controller for electronic circuits. 2. The auxiliary function mode control device for an electronic circuit according to claim 1, wherein the auxiliary function is a failure record display mode of a vehicle airbag control electronic circuit. 3. The key setting function according to claim 1, wherein the auxiliary function is an ID setting mode of the keyless door lock device.
An auxiliary function mode control device for an electronic circuit according to the above.