JPS5811633Y2 - Vehicle warning display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a warning display device for a vehicle, and more particularly, to an improvement of a warning display device for a vehicle that displays the occurrence of abnormalities in many abnormality detection parts on the driver's seat panel surface.

Generally, a vehicle has many abnormality detection parts, and safe driving cannot be expected unless each of these parts is maintained normally.

A vehicle warning display device informs the occupant of an abnormality at each abnormality detection part, and is extremely important for safe driving.

Each abnormality detection part is individually equipped with enough sensors to detect the abnormality, but there are various detection outputs, and in particular, the occurrence of a detection output can be immediately judged as an abnormality. There are some that are allowed to do so, and some that are considered abnormal only when the detection output continues for a predetermined period of time.

This latter case is particularly the case when driving conditions such as vehicle vibration and road surface inclination affect the sensor.

For example, a cooling water amount sensor generates an output of insufficient cooling water due to vibration or inclination of the cooling water level.

In addition, oil level sensors also have this kind of problem.

Therefore, in the past, a delay circuit was separately provided in the output section of this type of sensor, and a delay time of about 10 seconds was set for the cooling water sensor, and a delay time of about 20 seconds was set for the oil level sensor. An abnormality detection output can be generated only when the error continues for a set period of time.

Providing a separate delay circuit according to the detection output of the sensor in this way requires the complexity of manufacturing the delay circuit and the overall circuit configuration of the vehicle warning display device. The disadvantage is that it becomes expensive.

An object of the present invention is to provide a warning display device for a vehicle that eliminates the need for a separately provided delay circuit, simplifies the circuit configuration, reduces the number of components, and reduces the cost.

The present invention is characterized in that the output of each sensor is supplied via one delay circuit to a rotary switch and a rotary drive unit that rotates a rotary drum, and also to a warning display circuit.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

Various sensors S1. S2 to Sn are arranged at each abnormality detection portion of the vehicle, and each sensor Sl to Sn is constituted by an electric switch that is turned off when an abnormality is detected.

One terminal of each sensor S1 to Sn is electrically grounded, and the other terminal is terminal 0 of the rotary switch SW.
1 to On, respectively.

The rotary switch SW is provided to select and selectively output each detection output of each sensor S1 to Sn.

This rotary switch SW includes a fixed contact P along with fixed contacts P1 to Pn electrically connected to terminals 01 to On.

are arranged, and each fixed contact P1 to Pn and P.

A slider m is slidably provided.

A resistor R is individually connected to each fixed contact P1 to Pn.
The power supply vcc is supplied via 1 to Rn, so that
Power source ■ for each sensor S1 to Sn.

. is always powered. For this reason, each terminal 01 to O
Level outputs are generated at the fixed contacts P1 to Pn as the sensors S1 to Sn turn on and off.

This output is taken out via an OR circuit 1 consisting of diodes D1 to Dn connected to terminals 01 to On, respectively, and input to a delay circuit 2.

The delay circuit 2 is configured to generate an output only when the output of each sensor S1 to Sn continues for a predetermined period of time, and is set to a delay time suitable for the output of each sensor S1 to Sn.

The output of this delay circuit 2 is connected via an inverter 3 to a fixed contact P of a rotary switch SW.

taken from. Each fixed contact P1 to Pn and P of the rotary switch SW.

The outputs of the sensors S□ to Sn are selectively taken out by the slider m and manually inputted to the rotation control section 4.

The rotation control unit 4 is provided to synchronize and intermittently rotate the slider m of the rotary switch SW and the rotary drum 5.

A warning display section 5A is provided on the surface of the rotating drum 5, and warning display items corresponding to each of the sensors S1 to Sn are arranged.

Although not shown, a display window is provided on the driver's seat panel surface, and the warning display items of the rotating drum 5 are sequentially projected onto the screen of this window in response to the drive of the rotation control unit 4.
The abnormality detection outputs of sensors S0 to Sn are displayed.

The output of the slider m is input to a NAND circuit 42 together with the outputs of the check circuit 40 and the oscillator 41, and the oscillator 41 is controlled by the output of the NAND target path 42.

The oscillator 41 is provided to generate a control output for rotating the rotary drum 5 in a stepwise manner, and is composed of a clock pulse generator.

The check circuit 40 is provided to check the operation of the entire device when the power is turned on, and generates an output for a predetermined period of time when the power is turned on.

The output of the oscillator 41 is inputted to a motor 44 via a motor drive circuit 43, and a rotary shaft of the motor 44 is connected to a slider m and a rotary drum 5.

A motor drive circuit 43 is provided to output a motor control current according to a clock pulse, and the motor 44 is rotated in a staggered manner by this control input.

As a result, each display on the circumferential surface of the rotating drum 5 is
By the rotation of 4, the switch is switched together with the slider m, and a predetermined display is made.

In addition to the display by the drum 5, an alarm display circuit 6 is provided to display an abnormality at the abnormality detection site, and this alarm display circuit 6 is driven by the output of the inverter 3.

The alarm display circuit 6 includes a lamp blinking circuit 60 and an indicator lamp 6.
1A.

61B, and in the case of this embodiment, the display lamp 61
A is a red lamp, and the display lamp 61B is a blue lamp.

The lamp blinking circuit 60 is connected to the output of the inverter 3 and the oscillator 4.
1 is input and driven, and the display lamps 61A, 6
1B is blinked by the output of the lamp blinking circuit 60.

The operation will be explained based on the above configuration.

Sensors S1 to Sn disposed at abnormality detection locations in various parts of the vehicle are normally on and turned off when an abnormality is detected.

Therefore, each fixed contact P1 to Pn of the rotary switch SW is always grounded and at a low level (hereinafter referred to as L level).

) and becomes No-I level (hereinafter referred to as H-level) due to abnormality detection.

Suppose that each part of the vehicle is maintained normally and each sensor S1 to S
Suppose that n is turned on, slider m is now at fixed contact po, and the power is turned on.

Then, the check circuit 40 outputs an L level signal for a predetermined period of time required to start the motor 44 in order to check the entire device.

This L level signal is input to the Nant gate 42.

As a result, the NAND circuit 42 generates an H level signal, and based on this signal, a clock pulse is generated from the oscillator 41 and input to the motor drive circuit 43.

The drive circuit 43 generates a control output for the motor 44, and the motor 44 is rotated in a stepwise manner.

As a result, the slider m and the rotating drum 5 are connected to the fixed contact P0.
to Po and the corresponding display items are rotated.

As a result of this rotation, the slider m comes into contact with the fixed contact Po.

This fixed contact P. , the inverted levels obtained by the levels of the fixed contacts P1 to Pn via the delay circuit 2 and the inverter 3 appear.

In this case, the output of the slider m is the fixed contact P.

Since the signal is at H level, it becomes H level and is input to the Nando target path 42.

The check circuit 40 generates an L level signal only when the power is turned on, and otherwise outputs an H level signal.

The oscillator 41 also always outputs an H level signal, and the input is H.
In the case of level, the motor 44 is driven.

Therefore, when all three inputs of the NAND circuit 42 are in the H level state, the output of the NAND circuit 42 becomes an L level signal, the oscillator 41 stops oscillating, and the motor 44 stops rotating.

Therefore, if the sensors S1 to Sn do not detect any abnormality, the motor 44 is always stopped and the slider m is connected to the fixed contact Po.
Although not shown, an indication indicating that no abnormality has occurred is displayed on the rotating drum 5, for example, OK.

In this case, the output of the oscillator 41 and the inverter 3
The output of is input to the lamp blinking circuit 60, and the blue indicator lamp 61B blinks in response to the output of the oscillator 41, and the slider m is a fixed contact P.

Lights up continuously when it reaches the top.

If an abnormality occurs in any part of the vehicle and, for example, sensor S3 turns off, the output level of fixed contact P3 rises to H level.

This is input to the delay circuit 2 via the OR circuit 1.

When this H level continues longer than the delay time set in the delay circuit 2, the H level output from the delay circuit 2 is input to the inverter 3, and its inverted output is sent to the fixed terminal P.

appears in Fixed terminal P. The level of is always set at H level when each sensor S1 to Sn detects no abnormality, and the slider m is fixed here.

This fixed terminal P. When becomes L level, this slider m
is input to the NAND circuit 42, and the NAND circuit 42 receives an H signal.
A level output is generated.

The oscillator 41 is driven by the output of the NAND circuit 42,
The motor drive circuit 43 is driven by the clock pulses generated thereby, and the motor 44 is rotated in steps.

As a result, the slider mbaP.

The rotating drum 5 is also rotated in synchronization with this movement from Pl to P3.

When the slider m contacts the fixed contact P3, the output level of the fixed contact P3 is at H level, so the NAND circuit 4
The input No. 2 becomes H level, and the motor 44 stops here.

At this time, the rotating drum 5 is connected to the fixed contact P3, that is, the sensor S3.
The system will stop at the indicated position, and a warning will be displayed to indicate the abnormal area.

At this time, the red indicator lamp 61A flashes or lights up continuously, and a warning is displayed at the same time as the abnormal area is displayed.

That is, the output of the inverter 3 is input to the lamp blinking circuit 60, which is thereby activated, and the display is switched from the indicator lamp 61B to the red indicator lamp 61A to indicate an abnormality.

The blinking operation of the indicator lamp 61A is performed by the clock pulse of the oscillator 41, and after the oscillation of the oscillator 41 has stopped, the display lamp 61A is turned on continuously.

As described above, each output of the sensors S1 to Sn is connected to the fixed contact P via one delay circuit 2.

and is input to the lamp blinking circuit 60, and an abnormality display operation is performed only when the abnormality detection output of each sensor S to Sn continues for a predetermined period of time.

Since some of the sensors S1 to Sn have their detection outputs fluctuated due to vibrations, etc., erroneous display caused by this is prevented, and highly reliable abnormality warning display can be performed.

As explained above, according to the present invention, a single delay circuit can unify the detection output generation time of each sensor and display a warning, so the circuit configuration can be simplified and the number of parts can be reduced, resulting in low cost. The reliability of the warning display can be improved.

[Brief explanation of the drawing]

The figure is a block diagram showing an embodiment of the vehicle warning display device of the present invention. S engineering, S2...Sn...sensor, SW...
... rotary switch, 2 ... delay circuit,
4...Rotation control section, 5A...Warning display section, 6...Warning display circuit.

Claims (1)

[Scope of utility model registration request] A plurality of sensors are installed at the abnormality detection parts of the vehicle, a rotary switch that selectively outputs the detection output of each sensor sequentially, and the detection part of the sensor is displayed on the surface that rotates in conjunction with the switching of the rotary switch. is displayed, a delay circuit that receives the detection output from each sensor and outputs the detection output only when the detection output is connected for a predetermined period of time, and a delay circuit that is activated by the output of this delay circuit, and the rotary A warning display device for a vehicle, comprising: a rotation control unit that rotates in conjunction with a switch and a rotating drum.