JP2000318840A - Vehicle fall detection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle fall detection system in which rescue work when a garbage carrying vehicle falls into a garbage pit can be conducted quickly. SOLUTION: In a vehicle fall detection system to detect if a garbage carrying vehicle 1 advancing to a specified place has fallen into a garbage pit 2 or not, a first sensor S1 to detect the rear side of the garbage carrying vehicle 1, and a second sensor S2 to detect the front side of it are provided, and an alarm by an alarm means is made when the first sensor S1 is ON, and with continuity of an OFF condition of the second sensor S2 for a specified time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle fall detection system for detecting whether a garbage carrying vehicle that has entered a predetermined place has fallen into a garbage pit.

[0002]

2. Description of the Related Art When a garbage carrying vehicle 1 enters a platform, as shown in FIG. 5 (a), the garbage carrying vehicle 1 is backed up to a position before a garbage loading door 3 provided near a garbage pit 2. Proceed, and the trash input door 3 is opened. Then, the user lifts the packer 1a of the vehicle 1 to put the waste therein into the waste pit 2.

[0003]

Here, if the packer 1a is lifted and operated while the vehicle is being backed up when putting in garbage, as shown in FIG. 5 (b), the vehicle loses its balance due to momentum. There is a possibility that the vehicle 1 will fall into the garbage pit 2 with the rear side serving as a fulcrum and the front side rising. There is no problem as long as the vehicle 1 is stopped in front of the refuse input door 3 and the normal operation of lifting the packer 1a is not a problem. It is possible. If it falls into the garbage pit 2, there is a danger of further occurrence of a secondary disaster such as lack of oxygen due to generated gas or collision with the garbage crane bucket, and it is necessary to perform rescue work early. Therefore, monitoring of the garbage pit 2 by providing a TV monitor or visual monitoring of the garbage pit 2 is performed. However, in this method, the garbage carrying vehicle 1 that has fallen into the garbage pit 2 can be found. There is a possibility that a delay may occur, and improvement has been desired. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle fall detection system that can quickly perform a rescue operation when a garbage carry-in vehicle falls into a garbage pit.

[0004]

A vehicle fall detection system according to the present invention for achieving the above object detects whether or not a garbage carry-in vehicle that has entered a predetermined place has fallen into a garbage pit. Vehicle fall detection system,
The apparatus further includes a sensor provided at the predetermined location for detecting the garbage carrying vehicle, and an alarm for issuing an alarm based on an output from the sensor.

According to this configuration, the sensor means is provided at a predetermined location where the garbage carrying vehicle enters, and an alarm is issued based on the output of the sensor means. That is, the sensor means automatically detects whether or not the garbage carry-in vehicle has fallen into the garbage pit, and when the fall is detected, an alarm is issued by the alarm means. As a result, a vehicle fall detection system that can immediately perform rescue work because surrounding objects immediately notice the occurrence of an accident can be provided. In addition, it is preferable that the alarm means appeal to the hearing,
Further, those that appeal to the visual sense may be used in combination.

In a preferred embodiment of the present invention, the sensor means includes a first sensor for detecting a front side of the garbage carrying vehicle and a second sensor for detecting a rear side of the garbage carrying vehicle.

As shown in FIG. 5B, the attitude of the garbage carry-in vehicle is such that the front side rises with the rear side as a fulcrum. Paying attention to this point, by providing the first sensor for detecting the front side of the garbage carrying vehicle and the second sensor for detecting the rear side, it is possible to reliably detect the vehicle falling.

[0008] In another preferred embodiment of the present invention, the first sensor and the second sensor are constituted by photoelectric switches, and the second sensor is in an ON state, and When the OFF state continues for a predetermined time, an alarm is issued by the alarm means.

[0009] Here, the sensor is defined as ON when the presence of the vehicle is detected by the sensor, and when the sensor is OFF, the presence of the vehicle is not detected by the sensor. It is defined as state. That is, in the state shown in FIG. 5B, the state of the vehicle that is about to fall is such that the rear second sensor is ON and the front first sensor is OFF. Further, even if the front side of the vehicle is lifted, the vehicle may return to the original posture due to the position of the center of gravity. Therefore, it is assumed that the vehicle has fallen for the first time when the OFF of the first sensor is continued for a predetermined time. Judgment is made and an alarm is issued by the alarm means. As a result, a vehicle fall detection system with good detection accuracy can be provided.

[0010] In still another preferred embodiment of the present invention,
The first sensor includes a light emitter and a light receiver,
The light emitter and the light receiver may be arranged so as to be shifted in the front-rear direction of the garbage carrying vehicle.

According to this configuration, when a garbage carrying vehicle enters between the light emitting device and the light receiving device, the light from the light emitting device is cut off, and the entry and presence of the vehicle are detected. Further, by shifting the light emitter and the light receiver in the front-rear direction of the garbage carrying vehicle, it is possible to cope with vehicles of various lengths, and versatility is improved.

In still another preferred embodiment of the present invention,
The second sensor includes a light emitter and a light receiver,
The light projector may have a predetermined number of light projecting units along the height direction, and the light receiving device may have a number of light receiving units larger than the predetermined number along the height direction.

According to this configuration, the rear side of the vehicle can be reliably detected by providing several light projecting portions and light receiving portions along the height direction. By making the number of light receiving units larger than the number of light emitting units, light from the light emitting unit can be reliably detected.

In still another preferred embodiment of the present invention,
The second sensor is constituted by a photoelectric switch, and the first sensor is constituted by a loop coil. When the second sensor is ON and the OFF state of the first sensor continues for a predetermined time. One that gives an alarm by the alarm means is mentioned.

The first sensor may be a sensor that detects the ON / OFF state of the loop coil instead of a photoelectric switch. The definition of ON / OFF is as described above. In the case of a loop coil, since it can be buried in concrete, it can be arranged so as not to disturb the operator.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a vehicle fall detection system according to the present invention will be described with reference to the drawings. FIG.
FIG. 3 is a plan view of an incineration facility (part) in which a vehicle fall detection system is used.

In the figure, a large number of entrances 3 are provided on the left side for the garbage carrying vehicle 1 to enter the platform 4, and a garbage pit 2 is provided on the front side of the platform 4.
Is provided. The garbage pit 2 is a pit into which garbage having a depth of about 10 to 40 m is injected. On the side of the platform 4 where the garbage pits 2 are provided, a number of garbage input sections 7 are provided, and a garbage input door 3 is provided behind the garbage input section 7. The garbage carry-in vehicle 1 that has entered the platform 4 enters one of the garbage input sections 7 while backing, and when it is detected that the vehicle 1 has entered the garbage input section 7, the garbage input door 3 is opened. , The refuse can be put into the refuse pit 2. The garbage carrying vehicle 1 in which garbage has been charged exits from the exits 6 on both sides of the platform 4 in FIG.

<First Embodiment of Vehicle Fall Detection System> Next, a first embodiment of a vehicle fall detection system will be described with reference to FIG. FIG. 2 is a diagram for explaining the outline of the vehicle fall detection system. FIG. 2A shows a state in which the garbage carry-in vehicle 1 has completed the entry while backing the garbage input unit 7. In this state, the dust input door 3 is not shown in FIG. 2 because it is open.

As a sensor means for detecting the garbage carrying vehicle 1, a first sensor S1 for detecting the front side of the vehicle 1
And a second sensor S2 for detecting the rear side of the vehicle 1. The first sensor S1 is, as shown in FIG.
The first sensor S1 is ON when the garbage carrying vehicle 1 enters and the infrared light from the first projector 11 is cut off. Further, as shown in FIG.
The light receiver 12 is arranged so as to be shifted along the direction of the garbage carrying vehicle 1. Thereby, it is possible to cope with the garbage carrying vehicle 1 having various body lengths. Although not shown, the first light emitter 11 is provided with one infrared light emitting LED chip, and the first light receiver 12 is provided with an infrared light detection phototransistor.

The second sensor S2 comprises a second light projecting device 13 and a second light receiving device 14, as shown in FIG. The second floodlight 13 includes three infrared-emitting LED chips 13a, 13b, and 13c arranged along the height direction.
(Corresponding to a light emitting section), and these chips 13a, 13
b, 13c.
The second light receiver 14 includes six infrared light detecting phototransistors 14a, 14b, 14 arranged along the height direction.
c, 14d, 14e, 14f (corresponding to a light receiving section)
And a holder 14g for supporting the phototransistors 14a to 14f. LED chip 13a
Of the phototransistors 14a, 14b,
The light emitting area of the LED chip 13b is covered with the phototransistors 14b, 14c, 14d, and 14c.
e, and the light emitting area of the LED chip 13c is covered by the phototransistors 14d, 14e, and 14f. Thereby, the detection of the garbage carrying vehicle 1 by the second sensor S2 is ensured.

The LED chip of the first sensor S1 comprises:
Above the tire house of a 5t car, approximately 1 height
m. The LED chip 13c at the highest point of the second sensor S2 is approximately 2 m.
It is set at about the height position. The reason why the first sensor S1 is set low is to prevent the first sensor S1 from being in the way of the operator, but is not limited thereto.
May be set to the same height as the second sensor S2.

As shown in FIG. 2A, the outputs of the first sensor S1 and the second sensor S2 are connected to a detection circuit 8 and an alarm circuit 9.

<Fall Detection Flowchart> Next, the detection of a fall of the garbage carrying vehicle 1 will be described with reference to the flowchart of FIG. First, it is detected whether or not the garbage carrying vehicle 1 has entered the garbage input section 7 (# 01). this is,
It is possible to detect whether the garbage carrying vehicle 1 has passed the first sensor S1. When it is detected that the vehicle has entered, the refuse input door 3 is opened (# 02). further,
After the second sensor S2 is turned on (# 03), the first
It is detected whether or not the sensor S1 has been turned off for a predetermined time or more (# 04).

FIG. 2B shows a state in which the garbage carry-in vehicle 1 falls. In the course of the fall, the front side of the vehicle 1 is raised with the rear side of the vehicle 1 as a fulcrum. . In this state, the first sensor S1 is in an OFF state, and the second sensor S2 is in an ON state. In the normal state, both the first sensor S1 and the second sensor S2 are ON
State. Accordingly, the fact that the first sensor S1 is OFF despite the fact that the second sensor S2 is ON means that some abnormality has occurred. Here, the predetermined time is preferably set to 2 to 15 seconds. Particularly preferably, it is 10 to 15 seconds. This is because, as shown in FIG.
This is because even if the front side rises, it may not fall down and may return to its original state. This makes it possible to accurately detect a vehicle fall. In FIG. 2B,
What is indicated by 1b is a tailgate.

In step # 04, if OFF of the first sensor S1 is detected for a predetermined time or more, an alarm display is performed (# 05). As a specific example of the alarm display, for example,
Examples thereof include those that appeal to hearing, such as sounding a buzzer or playing a message, and those that appeal to vision such as turning on a lamp, but are not particularly limited. Also,
Shut down the garbage crane with an alarm display.

If the first sensor S1 has not been turned off for a predetermined time or more, it is determined whether or not the garbage carry-in vehicle 1 has left (# 06). When the garbage carry-in vehicle 1 exits, the second sensor S2 should be turned off first, and then the first sensor S1 should be turned off, so that the exit can be detected. When the garbage carrying vehicle 1 exits, the garbage input door 3 is closed.

<Second Embodiment of Vehicle Fall Detection System> Next, a second embodiment of the vehicle fall detection system will be described with reference to FIG. The second sensor S2 has the same configuration as the first embodiment, but differs in that a loop coil is used for the first sensor S1. The size of the loop coil is 1.5 m × 3 m (width × length) as viewed from the ground, the thickness of the coil is about 5 mm, and the number of turns is about 3 turns. Of course, it is not limited to this.

An operation flowchart when a loop coil is used is the same as that in FIG. Whether or not the vehicle 1 in step # 01 has entered can be determined by detecting a change in the magnetic field with the loop coil. That is, an iron member is provided in the lower part of the vehicle 1, and the magnetic field is changed by this member.

In step # 04, when the front side of the garbage carry-in vehicle 1 rises, the first sensor S1 is turned off due to a change in the magnetic field, and this off state is maintained for a predetermined time (preferably 2 to 15 seconds). .) By continuing, a vehicle fall can be detected.

<Another Embodiment> As the first sensor S1,
An ultrasonic sensor may be used. In this case, ON / OFF can be detected based on the time until the transmitted ultrasonic wave returns. In the present embodiment, a photoelectric sensor is used as the second sensor S2, but a magnetic sensor or an ultrasonic sensor may be used instead. In the present embodiment, the photoelectric switch used for the first sensor S1 and the second sensor S2 is of a transmission type. Instead of this, a reflection type photoelectric switch may be used.

[Brief description of the drawings]

FIG. 1 is a plan view of an incinerator using a vehicle fall detection system.

FIG. 2 is a diagram showing a first embodiment of a vehicle fall detection system;

FIG. 3 is an operation flowchart of a vehicle fall detection system.

FIG. 4 is a diagram showing a second embodiment of a vehicle fall detection system;

FIG. 5 is a diagram showing a conventional technique.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 garbage carrying vehicle 2 garbage pit 8 detection circuit 9 alarm circuit 11 first light emitter 12 first light receiver 13 second light emitter 14 second light receiver S1 first sensor S2 second sensor

Claims (6)

[Claims] 1. A vehicle fall detection system for detecting whether a garbage carry-in vehicle that has entered a predetermined place has fallen into a garbage pit, wherein the vehicle carry-in detection system detects the garbage carry-in vehicle. A vehicle fall detection system comprising: sensor means provided at a location; and alarm means for giving an alarm based on an output from the sensor means. 2. A sensor for detecting a front side of the garbage carrying vehicle, and a second sensor for detecting a rear side of the garbage carrying vehicle.
The vehicle fall detection system according to claim 1, further comprising a sensor. 3. The first sensor and the second sensor are constituted by photoelectric switches, and the second sensor is an O switch.
3. The vehicle fall detection system according to claim 2, wherein an alarm is issued by the alarm unit in the state of N and when the OFF state of the first sensor continues for a predetermined time. 4. The first sensor according to claim 3, wherein the first sensor includes a light emitter and a light receiver, and the light emitter and the light receiver are arranged to be shifted in the front-rear direction of the garbage carrying vehicle. The vehicle fall detection system according to the above. 5. The second sensor includes a light emitter and a light receiver, wherein the light emitter has a predetermined number of light emitters arranged in a height direction, and the light receiver has a predetermined number of light emitters along the height direction. 4. The vehicle fall detection system according to claim 3, wherein a number of light receiving units greater than the predetermined number is arranged. 6. The second sensor is configured by a photoelectric switch, the first sensor is configured by a loop coil, the second sensor is in an ON state, and
The vehicle fall detection system according to claim 2, wherein an alarm is issued by the alarm unit when the OFF state of the first sensor continues for a predetermined time.