JPS59124444A - Warning device for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tube having an elastic wall, a detection element disposed within the tube to detect the degree of compression of the tube, and a detection element connected to the detection element to detect the degree of compression of the tube. The present invention relates to a vehicle warning device comprising signal generating means for generating a signal when the degree of compression exceeds a predetermined limit value.

Dangerous conditions arise when the door of a bus or other common means of transportation is closed when a large or obstructive object remains between the closing door and the door frame and the door is not visible to the sound of the operation. . This has created a need to develop a device that can reliably identify the degree of compression generated on the door edge in such hazardous conditions and generate a corresponding alarm. . In order to solve this problem, a warning device is configured to be able to measure the degree of compression or bending of the edge rubber at the edge of the door. Inside the rimmed rubber, for example, a hose filled with compressed air and a pressure switch connected to the end is inserted. When the internal pressure of the hose exceeds a set limit, the pressure switch closes the alarm circuit.

A warning device is also known in which a wire is inserted inside the rimmed rubber and a microswitch is connected to one end of the wire. In this case, when the edge rubber is compressed, the wire bends and activates the microswitch.

However, each of the above-mentioned devices has the disadvantage that the minimum compressive force that will generate an alarm signal varies depending on ambient conditions and time. When using pressure hoses, such changes can occur, for example, due to temperature fluctuations or leakage of compressed air from the hose.

If a wire is used, the wire will also be in tension because its length will exhibit a corresponding change in temperature and/or 4 degrees. For this reason, although the conventional device cannot be made extremely delicate, the edging rubber must be compressed very strongly before the warning device generates an alarm. For this reason, the warning can only be used for straight objects.

The object of the present invention is to make the operation independent of the surrounding conditions G and to obtain a sufficiently high degree of compression to detect the degree of compression of the hemline of a person's clothing, for example, when the force applied to the wrist of a person's clothing is 5 times. The object of the present invention is to provide a sensitivity warning device.

The present invention provides a warning device of the type mentioned at the beginning, in which the detection element for detecting the degree of compression of the tube includes a light emitting part and a light receiving part, and a light emitting part and a light receiving part are provided between the light emitting part and the light receiving part. passing the beam and connecting electrical means to the light receiving section,
After a predetermined time after the light intensity of the light beam received by the light receiving section starts to change, the electric means generates a correction amount of the light intensity of the light emitting section to correct the change in the light intensity. The present invention is characterized in that compensation is provided.

The sensitivity of the warning device is increased by using a light beam as the detection element and by incorporating in the circuitry of the warning device means to compensate for long-term and/or slow changes that occur in the device due to ambient conditions or to the durability of the device. can be made extremely high. The reason for this is that slow changes such as those mentioned above do not need to be taken into account when determining the limit value that will cause an alarm to be issued. In the case of the device according to the present invention, changes in characteristics over time are compensated for by increasing or decreasing the light intensity of the light emitting portion depending on the state, so that the life of the device is extended. Furthermore, since the inner surface of the edging rubber is made light reflective, it is clear that the device of the present invention can also be applied to curved edging rubber. Since the device of the present invention can be adjusted with extremely high sensitivity, it can be used not only for the above-mentioned purposes but also as a bus stop warning device that signals by pressing the tube with a finger. Confirmed.

The use of light beams for warning purposes is known, for example the device disclosed in DE 1,945,621 activates an air cushion, which is mounted on the outside surface of a vehicle and is , is equipped with a rigid tube, and a light-receiving part and a light-emitting part are provided at each end of these tubes, and in the event of a collision, the tube is compressed and the light communication between the light-emitting part and the light-receiving part is interrupted. The air cushion is activated when the air cushion is completely and finally cut off. However, since the tube in this case is rigid, it is clear that such a conventional device cannot be used as a door safety or as a stop@announcement switch. Furthermore, over time,
Light received by the light-receiving part by the same blooms of Hakori and Sen.
It is also possible for the air cushion to be activated even though the tube is not compressed due to the weakening of the pressure.

The invention will be explained with reference to the drawings.

FIG. 1 shows a vehicle door 1, which is provided with a hollow beveled rubber tube 2 or any suitable elastic material at the straight edge of the stile.

The tube 2 can also be constructed such that its circumferential cross-section, together with the edge of the door, has a circular cross-sectional shape and forms a closed cavity.

A light emitting unit 8 such as a light bulb, an LED, etc. is arranged at the lower end of the inner cavity of the rimmed rubber tube 2, and a light emitting unit 8 such as a photodiode, phototransistor, photoresistor, etc. is arranged at the upper end of the inner cavity of the rubber duplex. A light receiving section 4 is provided.

The light emitting section 8 generates a light beam that passes through the inner cavity of the edged rubber tube and reaches the light receiving section 4 .

FIG. 2 is a block diagram showing an example of the warning device of the present invention using direct current coupling. In this example, a current generator 5 is connected to a light emitting diode 8, and a PIN diode 4 acting as a light receiving section is connected to two-stage DC amplifier circuits 6 and 7.

The output terminal of the resonant amplifier 7 is connected to two parallel comparators 8 and 9.

Comparator 9 converts the signal coming from amplifier 7 to a limiting voltage Uli
Compare with mit. Such a comparator 9 is connected to an SR flip-flop 10, which in turn is connected to a relay for issuing an alarm.

According to the invention, the comparator 8 for comparing with the base voltage Uref
A delay circuit 1 exhibiting a delay time of, for example, 1-0 seconds.
Connect to 2. The output of the delay circuit 12 is controlled by automatic gain control (A
GC) is connected to the current generator 5 via the circuit 18. Also connected to the circuit 13 is an eighth ratio 1m1t comparator 14 which compares the signal of the circuit 18 with the limit voltage U. The output of this comparator is connected to a fault alarm device (not shown).

In operation, the light intensity of the light emitter 8 is determined by the current λ provided by the current generator 5. The current provided by the photodiode 4 is amplified by an amplifier 6.7 and sent to a comparator 8.9.

Comparators 8 to 9 set flip-flop 10 and control relay 11 when a sudden change above the limit voltage is detected in the transmission signal supplied to the comparator due to sudden compression of rubber tube 2.

If the signal level from the amplifier 7 changes slowly so as not to exceed the limit voltage Ulimit within the set time of the delay circuit 12, no special alarm will be issued. A signal is transferred to the current generator 5, which increases the light intensity of the light emitter 8, for example, so that the amount of light received by the light receiver 4 is reset to a high level, and at that moment the comparator 8.9 changes so that the level of the signal received is reset to the regular constant level. In this way, the warning device according to the invention compensates for the slow changes caused by the strong decay of the light beam, so that the device A according to the invention can be made extremely sensitive.

At the same time, front axes caused by slow changes that can become quite large in the future are prevented.

However, if the signal level of the AGC circuit is λ, for example, the comparator 14
If the voltage increases to such an extent that it exceeds the limit voltage set in , the compensation ability of the warning device will be exhausted and a defect report will be issued.

The AC-coupled newsletter device 2 shown in FIG. 8 basically operates in the same manner as the DC-coupled device described above (2).

However, in this case, the oscillator 15 is connected to the short current generator 5 to lvlal the light emitting diode 8 in a pulsed manner. Furthermore, an AC amplifier 16 is used in place of the second DC amplifier 7, thereby separating the original pulse-like signal from the DC component. A peak value indicator 17 indicating a signal peak value is connected to the output terminal of the amplifier 16. A comparator, a delay circuit, and an AGO circuit, which are the same as in the case of DC coupling, are connected to the downstream stage of this peak value indicator.

As mentioned above, since the device of the present invention is highly sensitive, it can also be implemented as other types of alarm and notification devices, such as bus stop notification switches and machine tool transvestite edge switches. . In this case, a long continuous tube having an elastic wall is used, and an optical path is formed inside the tube from a light emitting part to a light receiving part. Fix the lion switch to the wall. When the tube is pushed at a certain position, the light intensity reaching the light receiving section changes, and this change is detected by the limit value comparison means as ON10F.
It is determined as F information.

The light transmission ability of the tube can be improved by placing it within a separate inner tube or by providing a coating that reflects light better than the tube itself.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing the operating principle of the present invention, Fig. 2 is a block diagram showing an example of the inventive device using DC coupling, and Fig. 8 is a block diagram showing an example of the inventive device using AC coupling. be. 1... Door 2... Rubber tube 3
...Light emitting section 4...Light receiving section 5...Current generator 6,7...DC amplifier 8.9...Ratio! tja 10...Flip-flop 11
...Relay 12...Delay circuit 18...
・Automatic gain control circuit 14...Comparator 15...Transmitter 16...AC amplifier 17...Peak value indicator Drawing engraving (no changes to the contents) Procedural amendment January 25, 1982 Day 1, Indication of the case 1981 Patent Application No. 201880 2 Name of the invention Vehicle warning device 3, Person making the amendment Relationship to the case Patent applicant Name Kalervo Virtanen 5゜6, Subject of the amendment Power of attorney 1 drawing

Claims (1)

[Scope of Claims] 1. A tube having an elastic wall, a detection element disposed within the tube to detect the degree of compression thereof, and a detection element connected to the detection element to detect the degree of compression of the tube. Predetermined 1ji
In the vehicle warning device, the detection element for detecting the degree of compression of the tube includes a light emitting part and a light receiving part, and the detection element for detecting the degree of compression of the tube has a light emitting part and a light receiving part. A light beam is passed between the light receiving part and an electrical means 'f: is connected to the light receiving part, and after the light beam received by the light receiving part begins to be modified, After the scheduled time, the ttEK-like means corrects the amount of light @ intensity of the light emitting section? 1. A warning device for a vehicle, characterized in that the change in light intensity is compensated for when the change in light intensity occurs. λ The device according to claim 1, wherein the means for compensating for the change in light intensity includes a comparator for comparing the output signal of the light receiving section with a base voltage, a slow and low circuit, and a circuit for compensating for the light emitting section. and an automatic gain control circuit connected to a current generator. & The vehicle warning device according to claim 2, wherein the time constant of the delay circuit is about 10 seconds. 4. In the device according to claim 2, a comparator is connected to the automatic gain control circuit to compare the signal level of the automatic gain control circuit supplied to the current generator for the light emitting section with a predetermined limit voltage. A warning device for a vehicle, characterized in that a failure warning is generated when the signal level of the automatic gain control circuit exceeds the predetermined limit voltage. 6. The vehicle warning device according to claim 1, wherein the light emitting section includes a light bulb or an LED, and the light receiving section includes a photodiode, a phototransistor, or a photoresistor. & The device according to claim 1, wherein the
- Vehicle warning device 0 characterized in that a coating that reflects light well is provided on the inner surface of the bulb.