JPH0253260B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an abnormal state display device for a vehicle that centrally displays an alarm for abnormal states of various parts of the vehicle.

Conventional centralized warning systems for automobiles are equipped with abnormality detection sensors for each of the plurality of detected parts of the car, and in response to abnormality detection signals from the sensors, the details of the abnormality are centrally transmitted to one place in the instrument panel of the driver's seat. It is intended to be displayed in By the way, with conventional devices of this kind, if two or more abnormalities occur at the same time, it is impossible due to space constraints to display all of them, so the one with the highest degree of importance is displayed with priority. There is. That is, for example, if a decrease in battery fluid and wear on the brake pads occur at the same time, the wear on the brake pads is more important, so this is displayed.

However, with such a central warning system for automobiles, even if two or more abnormalities occur at the same time, only the more important one is displayed, making it difficult for the driver to know that other abnormalities are occurring. There was a problem that it was not possible and not desirable. Furthermore, if the displayed abnormality is very important, the undisplayed abnormality may also be quite important, and in such cases, there is a problem in that the function of the alarm device is considerably impaired.

This invention was made in view of the problems of the conventional ones as described above, and when multiple abnormalities occur at the same time, the most important one is displayed, and the number of abnormalities that have occurred is also displayed. Furthermore, by operating a switch, the driver can sequentially switch and display other abnormalities other than the one with the highest priority, and when the switch is returned, the display of the abnormality returns to the one with the highest priority. You can know that other abnormalities have occurred and the number of abnormalities, and you can easily check all the abnormalities by operating a switch.If you return the switch to its original state, the highest priority abnormality will be displayed. The object of the present invention is to provide an abnormal state display device for a vehicle that can recover from the abnormal state.

An embodiment of the present invention will be described below based on the drawings.

FIG. 1 shows a block circuit of an abnormal state display device for a vehicle according to an embodiment of the present invention, and in the figure, reference numerals 1a to 1h indicate abnormality detection sensors (not shown) provided in a plurality of detected parts of the automobile. This is an input terminal into which the output signals of are input, and these are arranged in descending order of the importance of the abnormality. 2
is an oscillator that generates a 1 Hz clock; 3 is a counter that counts the output clock of the oscillator 2; 4 is one of the signals of the eight input terminals 1a to 1h inputted to its input terminals X0 to X7;
5 is an oscillator; 5 is an oscillator; 5 is an oscillator; the data selector selects according to the count value of the counter 3 output to terminals A, B, and C and outputs output signals at predetermined time intervals in order of priority; An AND circuit which has two inputs, the inverted signal of the output of 2 and the output of the data selector 4, 6 an item number counter as an item number counting unit that counts the output of the AND circuit 5 every round, 7 an item number counter 6 A display latch circuit 8 latches the output of the display latch circuit 7, a display decoder/driver circuit 8 decodes the output of the display latch circuit 7 and outputs a drive signal, a display decoder/driver circuit 9 that is driven by the display decoder/driver circuit 8, and detects the number of items in which an abnormality has occurred. Number of items displayed in numbers, 10 is counter 3
The latch pulse is inputted to the latch input of the display latch circuit 7 and also inputted to the T terminal of the flip-flop 18 to reset it. Reference numeral 11 denotes a reset pulse generating circuit which generates a reset pulse in response to the fall of the latch pulse, and the reset pulse resets the counter 3 and the item number counter 6. 1
2 is an item latch circuit into which the output of the counter 3 is input; 13 is a decoder/driver that decodes the output of the item latch circuit 12 and generates a drive signal; 1;
4 is driven by the decoder/driver 13,
This is a warning display device that serves as an abnormality content display section that displays the abnormality content of the detected part that has the highest priority in a normal state with a picture or symbol. Further, 15 is a push button switch which gives the highest priority display when off and sequentially changes the display when on; 16 is a resistor connected between the power supply +Vcc and ground via the switch 15; and 17
18 is an AND circuit having three inputs: the output of the data select 4, the output of the oscillator 2, and the on/off signal of the pushbutton switch 15. The D input of 18 is grounded, and the latch pulse of the latch pulse generation circuit 10 is input to the T input. , a flip-flop whose S input is the output of the data selector 4; 19 is an AND circuit whose two inputs are the inverted on/off signal of the pushbutton switch 15 and the Q output of the flip-flop 18; 20 is an AND circuit 17; This is an OR circuit which has two inputs: the output of , and the output of the AND circuit 19 , and its output is input to the latch input of the item latch circuit 12 .

FIG. 2 shows a waveform diagram of each part of the circuit of FIG. 1, in which a is the output clock of the oscillator 2, b, c,
d is the QA, QB, and QC output of the counter 3, e is the latch pulse that is the Q output of the latch pulse generation circuit 10, f is the reset pulse that is the Q output of the reset pulse generation circuit 11, and g is the output of the data selector 4. h is the Q output of the flip-flop 18, i is the T input of the item number counter 6, and j is the on/off state signal of the push button switch 15, respectively.

Next, the operation will be explained.

Assume that an abnormality occurs at two locations while the car is running, and abnormality detection signals are input to input terminals 1a and 1c. The oscillator 2 generates the clock shown in FIG. 2a, and the counter 3 counts this, and its output becomes as shown in FIG. 2b, c, and d. The output of this counter 3 is the terminal A of the data selector 4,
The data selector 4 outputs the input signal corresponding to the count value to the Z output, and as a result, the Z output of the data selector 4 indicates that the count value of the counter 3 is "0" and "2", the signal becomes "H" as shown in FIG. 2g.
And flip-flop 18 is data selector 4
is set by the first output of the counter 3, that is, the output when the count value of the counter 3 is "0", and its Q output becomes as shown in FIG. The item latch circuit 12 is input to the latch input of the item latch circuit 12 through the input latch input of the item latch circuit 12.
When the Q output of 8 rises (A in Figure 2 h), the output of counter 3 becomes "0" (QA: 1, QB: 1,
QC: Load 1). Therefore, the content of the abnormality corresponding to the count value "0" latched by the item latch circuit 12, that is, the content of the abnormality corresponding to the signal at the input terminal 1a, is displayed on the warning display device 14 in the form of pictures or symbols. Become.

Since the input terminals are arranged in descending order of the importance of the abnormality, the displayed content at this time is the abnormality content with the highest priority.

On the other hand, the AND circuit 5 outputs a half-cycle pulse of the clock only when there is an output from the data selector 4, and this becomes the T input of the item number counter 6, so the signal at the T input is as shown in FIG. The item number counter 6 counts the number of rising edges B and C of this signal. Also, counter 3
The QC output will be a signal as shown in Figure 2 d,
By inputting this to the latch pulse generation circuit 10, the counter 3 counts from "0" to "7", and then a latch pulse is generated as shown in the figure e, and the rising edge D of this latch pulse causes the item number counter 6 to be The count value, in this case "2", is read into the display latch circuit 7. As a result, the number of abnormal items "2" is displayed on the item number display section 9 via the display decoder/driver 8.

Following the latch pulse of the latch pulse generating circuit 10, the reset pulse shown in FIG. The above operation is repeated, but during this time, the number of items display section 9 and the warning display device 14 continue to display the same display as long as the input signals of the input terminals 1a to 1h do not change due to the functions of the display latch circuit 7 and the number of items latch circuit 12. That will happen.

By the way, when the display is being performed in this way, if the number of items in the item number display section 9 is 2 or more and you want to know what the second abnormality is, press the push button switch 15 to the first position. Turn on as shown in Figure 2 j. At this time, since the output of the data selector 4 is on, the output of the AND circuit 17 is on for half a period of the clock, and the output is sent to the item latch circuit 1 via the OR circuit 20.
Item latch circuit 12
is the count value “2” of counter 3 (QA: 1,
QB:0, QC:1) is read, and the content of the abnormality corresponding to this count value, that is, the content of the abnormality corresponding to the input terminal 1c, is displayed on the warning display device 14. The waveform example in FIG. 2 shows the case where the push button switch 15 is turned on for a very short period of time, but generally, while the push button switch 15 is turned on, the contents of the abnormality are sequentially switched and displayed.
Furthermore, if the switch 15 is returned to the OFF state, priority display is restored. This return is performed by the decoder/driver 13 using the switching means (push button switch 15).
When displaying items with lower priority,
When the output signal of the latch pulse generation circuit 10 is input to the T terminal of the flip-flop 18, the Q output of the flip-flop 18 falls, and when a higher priority signal is input to the S terminal, the flip-flop 18 rises again. The data is input to the T terminal of the item latch circuit 12, and the decoder/driver 13 displays the item with the highest priority. In other words, latch pulse generation circuit 1
0, a flip-flop 18, an AND circuit 19, and an OR circuit 20 constitute display restoration means.

According to a vehicle abnormality display device having such a configuration and operation, when multiple abnormalities occur, the most important abnormality is displayed, as well as the number of abnormalities, so the driver can You can also know that there are other abnormalities occurring. Moreover, in this embodiment, abnormalities other than the most important abnormality can be sequentially switched and displayed.
It is very effective in terms of automobile safety measures.

As described above, according to the present invention, in a vehicle abnormal state display device that intensively displays abnormalities in each part of a vehicle, when a plurality of abnormalities occur, the most important abnormality is displayed and the number of abnormalities is displayed. In addition, other abnormal contents other than the one with the highest priority are also displayed sequentially by switching the switch, and when the switch is returned, the display of the abnormal contents returns to the display of the abnormal contents with the highest priority. This allows the driver to know that other abnormalities are occurring in addition to the displayed abnormalities, which is very effective in terms of vehicle safety measures. In addition, since the contents of the detected part with the highest priority are always displayed and the contents of other abnormalities are also sequentially switched and displayed by the switching means, not only can all the contents of the abnormality be easily known, but also the display switching means can be reset. Since the display recovery means stops displaying the contents of the abnormality that should be displayed with the highest priority, there is no need to use other operations to change the display to the highest priority, and the display with the highest priority is always displayed except when necessary, ensuring safety. It also has the effect of being extremely superior both in terms of functionality and ease of use.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram of an abnormal state display device for a vehicle according to an embodiment of the present invention, and FIG. 2 is a waveform diagram of each part of FIG. 1. 4...Data selector (signal selection section), 6...
Item number counter (item number counting unit), 9... Item number display unit, 14... Warning display device (abnormal content display unit).

Claims (1)

[Scope of Claims] 1. A plurality of abnormality detection sensors each detecting the occurrence of an abnormality in a plurality of detected parts of a vehicle, and output signals emitted from the plurality of abnormality detection sensors, starting from the one with the highest priority. a signal selection section that sequentially selects and sends out an output signal at predetermined time intervals; and an item number counting section that receives the output signal of the signal selection section and counts the number of output signals of the abnormality detection sensor in each round. , an item number display section that numerically displays the number of detected sections in which an abnormality has occurred in response to the output of the above-mentioned item number counting section; an abnormality contents display section that displays the contents of the abnormality in pictures or symbols; a display switching means that sequentially switches and displays the contents of the abnormality contents of the abnormality contents display section; An abnormal state display device for a vehicle, comprising display return means for stopping the display by the display switching means at the display of the abnormality content of the detected part having the highest priority in accordance with the output signal of the signal selection section.