JP2993783B2 - Warning display control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warning display control device capable of accurately displaying a warning by using a part of the warning display function when an abnormality occurs in the warning display function.

[0002]

2. Description of the Related Art Conventionally, there has been a warning display control device which constantly monitors the operation state of various machines and displays a warning when an abnormality occurs. For example, in the case of a vehicle, it is generally known that a warning indicator lamp flashes when the remaining amount of fuel becomes small, and the driver perceives it in advance.

In the warning display control device 2 shown in FIG. 10, a normally closed (NC) relay switch 8 is normally operated by a switching element 6 constituting the controller 4.
Is open, and the indicator lamp 12 of the indicator 10 is turned off. When an abnormal state is detected, the abnormal state detection signal turns on / off the other switching elements 14 constituting the controller 4, and the indicator lamp 12
Flashes. On the other hand, when the controller 4 becomes inoperable, the switching element 6 is not driven, so that the relay switch 8 is closed and the indicator lamp 12 is turned on. Therefore, the indicator 10 can perceive the control target and the abnormal state of the controller 4.

In the warning display control device 16 shown in FIG. 11, in a normal state, the normally closed (NC) relay switch 20 is opened by the controller 18 and the indicator lamp 24 of the indicator 22 is turned off. Then, when an abnormal state is detected, an abnormal state detection signal deactivates the controller 18 to close the relay switch 20, and the flasher 26 causes the indicator lamp 24 to close.
Flashes. On the other hand, when the controller 18 becomes inoperable, the controller 18 is not driven, so that the relay switch 20 is closed and the indicator light 24 is flashed by the flasher 26. Therefore, FIG.
As in the case of (1), the indicator 22 can perceive the control target and the abnormal state of the controller 18.

[0005]

By the way, in the case of the conventional example shown in FIG. 10, when the controller 4 has an abnormality, the indicator lamp 12 remains lit, so that it is difficult to recognize the abnormality as seen from the outside. There is an inconvenience.
In addition, when the relay switch 8 is out of order, if the indicator light 12 remains lit, the abnormal part is unknown, while if the indicator light 12 remains off, the abnormal state cannot be recognized. Furthermore, if the indicator light 12 fails, it is naturally impossible to recognize an abnormal state.

On the other hand, in the case of the conventional example shown in FIG. 11, even if there is an abnormality in the controller 18, the indicator lamp 24 blinks, so that an abnormal state can be clearly recognized. If it is impossible, or if the indicator lamp 24 breaks down, it is naturally impossible to recognize an abnormal state, as in the case described above.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned inconveniences, and provides a warning display control device which can always reliably and abnormally perceive an abnormal state of an object to be controlled and can also specify an abnormal part. The purpose is to do.

[0008]

In order to achieve the above object, the present invention provides an indicator having a plurality of warning indicators and an indicator when receiving an abnormal signal indicating an abnormal state of a controlled object. a main controller for outputting a first control signal for controlling at least one of said <br/> warning indicator to a second control signal for controlling the other of the at least one of the warning indicator constituting the indicator A warning controller which outputs a first oscillation pulse signal.
A first oscillation pulse signal generating means for generating a first control signal generating means for generating the first oscillation pulse signal based on the abnormal signal as said first control signal, output from the sub-controller Supplied by the second control signal
Is, the second control signal when receiving the abnormal signal
And a sub controller control means for the No. and valid, the sub-controller, the generating a second oscillation pulse signal
2 oscillation pulse signal generation means, and second control signal generation means for generating either the first oscillation pulse signal or the second oscillation pulse signal as the second control signal. Features.

[0009]

In the warning display control device according to the present invention, when the main controller receives an abnormal signal, the first control signal generating means supplies the first oscillation pulse signal to the warning indicator light constituting the indicator, and As a result, the warning indicator lamp flashes to notify an abnormal state. Further, the first oscillation pulse signal is supplied to a second control signal generation means of the sub controller. The second control signal generating means supplies the first oscillation pulse signal as a second control signal to another warning indicator light constituting an indicator, and causes the warning indicator light to blink.

Here, when a failure occurs in the main controller, the second control signal generation means uses the second oscillation pulse signal from the oscillation pulse signal generation means as a second control signal to form another indicator. Supply to the warning indicator lamp, and only the warning indicator lamp blinks. Further, when a failure occurs in the sub-controller, the warning indicator lamp blinks by the first oscillation pulse signal. In addition, at least when the main controller does not receive the abnormal signal, the sub-controller control unit turns off the warning indicator by invalidating the second control signal.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A warning display control device according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a warning display control device 30 according to this embodiment.
Is shown. The warning display control device 30 basically includes a main controller 32, a sub controller 34, and an indicator 36.

The main controller 32 includes an abnormality detection circuit 38 that outputs an abnormality detection signal when an abnormality in the operation state of the control target is detected, a main control circuit 40 that outputs an abnormality display signal based on the abnormality detection signal, An oscillating circuit 42 that outputs an oscillating pulse signal based on the abnormality indication signal; an OR circuit 44 that calculates a logical sum of the oscillating pulse signal and a test signal from the main control circuit 40; A drive circuit 46A that outputs a control signal to the sub-controller 34 and the indicator 36 based on the control signal, and a drive circuit 46B that enters a high impedance state based on the abnormality display signal from the main control circuit 40 are provided. In addition,
The drive circuit 46A is composed of a PNP transistor, the output signal of which is supplied from the OR circuit 44 to the base thereof, and outputs the control signal from the collector. The drive circuit 46B is formed of an NPN transistor, and the base thereof is supplied with an abnormality display signal from the main control circuit 40.
A control signal from the sub-controller 34 is supplied to the collector.

The sub controller 34 is a main controller 3
A driving circuit 46C for supplying a control signal to the driving circuit 46B of the main controller 32 and the indicator 36 based on an output signal of the OR circuit 48; , The control signal from the drive circuit 46A of the main controller 32 is LOW.
LOW level detection circuit 5 for detecting that the level has been reached
0, a delay circuit 52 that outputs a delay pulse signal delayed by a certain time from the point when the LOW level detection circuit 50 detects the LOW level, and outputs a pulse signal to the OR circuit 48 based on the delay pulse signal. Oscillation circuit 5
4 is provided. Note that the drive circuit 46C is formed of a PNP transistor, like the drive circuit 46A of the main controller 32.

The indicator 36 is disposed on, for example, an instrument panel of the vehicle, and has two indicator lights 56A and 56C. The indicator light 56A is
It is controlled by a control signal from the drive circuit 46A. The indicator light 56C is controlled by a control signal from the drive circuit 46C.

The warning display control device 30 of this embodiment is basically configured as described above, and the operation thereof will be described next.

First, a case where the warning display control device 30 is operating normally will be described with reference to a time chart of FIG.

When the power of the vehicle is turned on, the main control circuit 4
0 indicates that the drive circuit 46B is in the off state (high impedance).
Scan) as left (FIG. 2 (b)), and supplies an output signal which is turned to the drive circuit 46A via the OR circuit 44 (FIG. 2 (a)). The drive circuit 46A sends a control signal that is turned on based on the output signal to the indicator light 5 of the indicator 36.
6A, turning on the indicator lamp 56A (see FIG. 2).
(D)), and supplies to the drive circuit 46C and the control signal through the OR circuit 4 8 sub controller 34. The drive circuit 46C supplies a control signal that is turned on in accordance with the control signal to the indicator light 56C of the indicator 36 (FIG. 2).
(C)), the display lamp 56C is turned on (FIG. 2 (e)). Therefore, the indicator lamps 56A and 56C of the indicator 36 are turned on at the same time, whereby the warning display control device 30
Operates normally, and the initial check is completed.

Next, during normal running, the drive circuit 46
A is off, and the drive circuit 46B is on (low impedance).
) . Therefore, the indicator light 56A of the indicator 36 remains off (FIG. 2D). The LOW level detection circuit 50 is connected to the drive circuit 46A.
Is detected to be at the LOW level, and a delay pulse signal is output to the oscillation circuit 54 via the delay circuit 52. The delay pulse signal is input to the oscillation circuit 54 after being delayed by the time Td. Therefore, the oscillation circuit 54 supplies a delay pulse signal to the drive circuit 46C via the OR circuit 48. In this case, from the driving circuit 46C, FIG.
The control signal shown in (c) is output.
Is in the on state (low impedance) ,
Said control signal is conducted to the ground, the control signal that will be supplied to the indicator 36 becomes LOW level, and the display lamp 56C remains is turned off (FIG. 2
(E)). As a result, during normal driving, the indicator 3
6 keeps the light-off state.

When an abnormality is detected during traveling, the abnormality detection circuit 38 outputs an abnormality detection signal to the main control circuit 40.
The main control circuit 40 outputs an abnormality display signal to the oscillation circuit 42 and the drive circuit 46B. In this case, the oscillation circuit 42
Supplies an oscillation pulse signal to a driving circuit 46A via an OR circuit 44, and the driving circuit 46A outputs a control signal as an on / off signal to a display lamp 56A of the indicator 36, an OR circuit 48 of the sub-controller 34, and a LOW level. It is supplied to the detection circuit 50 (FIG. 2A). As a result, the indicator light 56A blinks (FIG. 2D). The drive circuit 46B is in the off state (high impedance).
Scan) and a (Figure 2 (b)).

The LOW level detection circuit 50 detects the fall of the control signal and drives the delay circuit 52, and supplies a delay pulse signal to the oscillation circuit 54 with a delay of time Td from the detection of the fall. . When the LOW level detection circuit 50 detects the falling of the next control signal, the oscillation circuit 54 stops the oscillation and the delay circuit 52
Transmission is started from the point in time when the delay pulse signal is supplied again. In this case, the time Td is set longer than the time Toff when the control signal from the drive circuit 46A is turned off. Accordingly, the output signal of the OR circuit 48 is synchronized with the control signal from the drive circuit 46A, and the control signal from the drive circuit 46C is also supplied to the indicator light 56C of the indicator 36 in synchronization with the control signal from the drive circuit 46A. (FIG. 2C). As a result, the indicator lights 56A and 56C
Flashes in synchronization with each other to notify an abnormal state (FIGS. 2D and 2E).

Since the indicator lights 56A and 56C are blinking in synchronization with each other, the observer does not notice that the indicator 36 has the plurality of indicator lights 56A and 56C.

Next, the case where the indicator light 56A of the indicator 36 has failed will be described with reference to the time chart of FIG.

In this case, the display lamp 56A is kept off (FIG. 3D), and it cannot be displayed even in an abnormal state. However, other indicator lights 56C
Is normal, it is possible to display the abnormality of the control target as in the case of the description of FIG. The indicator light 56A
Can be known in advance because half of the indicator 36 is darkened during the initial check. Similarly, when the indicator lamp 56C fails, the detection of an abnormal state and the prior detection of the failure can be similarly performed (see FIG. 4).

FIG. 5 is a time chart when the drive circuit 46A fails.

In this case, the control signal output from the drive circuit 46A remains off (FIG. 5A), and the indicator 56A is turned off (FIG. 5D). on the other hand,
The LOW level detection circuit 50 of the sub-controller 34 detects that the control signal is turned off, and the delay circuit 52 outputs a delayed pulse signal to the oscillation circuit 54 with a delay of the time Td.
Therefore, an ON / OFF control signal is output from the drive circuit 46C (FIG. 5C). In this case, the main control circuit 40 of the main controller 32 controls the drive circuit 4 during normal driving.
6B is turned on (low impedance), and when the abnormality detection signal is received from the abnormality detection circuit 38, the driving circuit 46
An abnormal display signal is output to B, and the drive circuit 46B is turned off (high impedance) (FIG. 5B). Therefore, at the time of the initial check, only the indicator light 56C blinks (FIG. 5 (e)), during normal driving, the entire indicator 36 is turned off, and when abnormal, only the indicator light 56C blinks. Thus, even if the drive circuit 46A breaks down, an abnormal state can always be detected, and the drive circuit 4A can be detected from the display state of the indicator 36.
6A can also be detected as having a failure.

FIG. 6 is a time chart when the drive circuit 46B fails.

[0028] In this case, the drive circuit 46 B is turned off
(High impedance) (FIG. 6 (b)),
The indicator light 56C blinks according to the control signal from the drive circuit 46A (FIG. 6 (e)). Indicator light 5
6A blinks according to the control signal from the drive circuit 46A (FIG. 6D). In this case as well, it is possible to detect an abnormal state and an abnormal part from the lighting state of the indicator 36.

FIG. 7 is a time chart when the drive circuit 46C fails.

In this case, the control signal output from the drive circuit 46C remains off (FIG. 7 (c)), and the indicator 56C remains off (FIG. 7).
(E)). On the other hand, the indicator lamp 56A is controlled by a control signal from the drive circuit 46A, and therefore can detect an abnormal state. In this case, the driving circuit 46C
Alternatively, it can be determined that one of the indicator lights 56C has a failure (see FIG. 4).

FIG. 8 is a time chart when the main controller 32 fails.

In this case, the drive circuits 46A and 46B remain off (FIGS. 8A and 8B), and therefore, the control signal output from the drive circuit 46C is
8 (c). As a result, the indicator light 56A is always off and the indicator light 5
6C is always in a blinking state (FIGS. 8D and 8E).

FIG. 9 is a time chart when the sub-controller 34 breaks down.

In this case, since the control signal from the driving circuit 46C remains off (FIG. 9C), the indicator 36 is in the same state as in FIGS. 4 and 7 (FIG. 9D). ), (E)). Therefore, it can be determined that there is a failure in any of the display lamp 56C, the drive circuit 46C, and the sub-controller 34.

[0035]

According to the warning display control device according to the present invention, when the device is normal, a plurality of warning indicators can blink simultaneously to notify an abnormal state of the controlled object to the outside. Further, when a failure occurs in the main controller, at least one warning indicator lamp blinks by the sub-controller, so that an abnormal state of the control target can be notified to the outside. In this case, since the entire indicator including the plurality of warning indicators is not in a blinking state, it is possible to recognize not only the abnormality of the control target but also a failure of a part of the device. Similarly, when a failure occurs in the sub-controller, the main controller recognizes the abnormality of the control target and the failure of the device. further,
Even when a failure occurs in a part of the warning indicator lamp, the main controller, and the sub-controller, it is possible to recognize the abnormality of the control target and the failure of the device.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of a warning display control device according to the present invention.

FIG. 2 is a time chart at the time of normal operation of the warning display control device according to the present invention.

FIG. 3 is a time chart in the case where the indicator lamp of the warning display control device according to the present invention has an abnormality.

FIG. 4 is a time chart in a case where the indicator lamp of the warning display control device according to the present invention has an abnormality.

FIG. 5 is a time chart when the drive circuit of the warning display control device according to the present invention has an abnormality.

FIG. 6 is a time chart in a case where there is an abnormality in a drive circuit of the warning display control device according to the present invention.

FIG. 7 is a time chart when the drive circuit of the warning display control device according to the present invention has an abnormality.

FIG. 8 is a time chart when the main controller of the warning display control device according to the present invention has an abnormality.

FIG. 9 is a time chart when the sub-controller of the warning display control device according to the present invention has an abnormality.

FIG. 10 is a configuration block diagram of a warning display control device according to the related art.

FIG. 11 is a configuration block diagram of a warning display control device according to the related art.

[Explanation of symbols]

 30 warning display control device 32 main controller 34 sub controller 36 indicator 38 abnormality detection circuit 40 main control circuit 42, 54 oscillation circuit 44, 48 OR circuit 46A to 46C drive circuit 50 LOW level Detection circuit 52: delay circuit 56A, 56C: indicator light

Claims (1)

(57) [Claims] And 1. A indicator having a plurality of warning lights, when receiving the abnormal signal indicating an abnormal condition of the control object, a first control signal for controlling at least one of the warning indicator constituting the indicator a main controller for outputting, a warning display control device and a sub-controller for outputting a second control signal for controlling the at least another one of said <br/> warning indicator constituting the indicator, the main A first oscillation pulse signal for generating a first oscillation pulse signal;
A generation unit, a first control signal generating means for generating the first oscillation pulse signal based on the abnormal signal as said first control signal, the second control signal outputted from the sub-controller
There is provided, the second when receiving the abnormal signal
And a sub controller control means for the control signals and valid, the sub-controller includes a second oscillation pulse signal generating means for generating a second oscillation pulse signal, the first oscillation pulse signal or the second And a second control signal generating means for generating any one of the two oscillation pulse signals as the second control signal.