JP2002312869A - Detector for material dropping on slope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detector for materials dropping on slopes which surely reports not only actual occurrence of an accident that materials drop on a slope like an avalanche of earth and rocks but also abnormality that a sensor, an alarm, and a controller are made abnormal or a worker tries to invalidate the detector by extraction of a power plug or the like. SOLUTION: The detector for materials dropping on slopes is constituted of a sensor 1 which detects materials dropping on a slope, a main controller 8 which outputs an alarm signal in accordance with a signal from this sensor, and alarms 2 and 3 which give alarms in accordance with a signal from the main controller, and this detector sends a signal showing occurrence of abnormality in the sensor and alarms to give an alarm when the main controller detects that abnormality occurs in at least one of the sensor and alarms.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensor such as a wire or an optical fiber for detecting the flow of an object such as a debris flow, an avalanche, or a water flow, or the passage of an object such as a falling rock, and issues an alarm in accordance with a detection signal of the flow of the object from the sensor. For detecting the flow of an object while performing a self-diagnosis as to whether or not a controller for normal operation is operating.

[0002]

2. Description of the Related Art Conventionally, as a device for detecting an object descending a slope such as a debris flow and issuing an alarm, a wire-type sensor for detecting a disconnection of an electric wire due to a debris flow, a vibration type sensor for detecting a vibration generated by a debris flow, There are acoustic sensors and the like that detect sound generated by debris flow, and when a controller receives a signal from these sensors, an alarm device such as a siren or a rotating light is energized to notify the occurrence of debris flow. Was.

[0003]

In the above-described conventional debris flow detecting device, if no abnormality has occurred in the sensor, the controller and the alarm, it is determined that the debris flow has occurred. An alarm can be issued, but if any one of the above fails, or if a short circuit occurs in the electrical wiring at any point between the controller and the wire sensor, a debris flow will occur even if the wire is cut, causing a debris flow. In addition, there is a problem in that even if electrical leakage occurs due to rainwater or the like, the current cannot be detected in the same manner, and the occurrence of debris flow or the like cannot be warned.

Further, when the sensor is a wire and the wire is cut by debris flow or the like, if the cutting point is close to the wire, the wire may come into contact with another wire to be energized. However, in this case, even though debris flow has occurred, an alarm may not be issued as there is no occurrence of debris flow, etc., and there is a possibility that an worker working nearby may be drawn into the debris flow. there were.

Further, a backup power supply is generally provided as a power supply for the controller and the alarm device. However, if the capacity of the backup power supply is exhausted in a state where power is not supplied to the controller or the like, debris flow may occur. Even if such an event occurs, the controller does not operate and the alarm does not operate, so that there is a problem that the occurrence of debris flow or the like cannot be notified.

An object of the present invention is to solve the above-mentioned problems. The object of the present invention is not only when an accident in which an object descends on a slope, such as a debris flow, actually occurs, but also when a sensor and an alarm are activated. In order to provide a slope-falling object detection device that can reliably report these abnormalities even when the controller becomes abnormal or when the operator attempts to disable the device by unplugging the power plug, etc. is there.

[0007]

SUMMARY OF THE INVENTION An object detecting apparatus for a descending slope according to the present invention achieves the above-mentioned object. A first aspect of the present invention provides a sensor for detecting an object descending a slope, and a sensor for detecting an object descending a slope. A main controller that outputs an alarm signal in accordance with a signal from the main controller, and an alarm device that generates an alarm in accordance with a signal from the main controller, wherein the main controller can be any one of the sensors and alarm devices. When the occurrence of an abnormality is detected, a signal indicating that an abnormality has occurred in the device is transmitted to issue an alarm.

According to a second aspect of the present invention, the main controller transmits a signal to the sensor at all times or at desired intervals, and determines whether or not a feedback signal from the sensor is present or the feedback signal is set in advance. This is to detect whether or not the value is within the range.

Further, the means of claim 3 switches the main controller to the sub-controller when the main controller becomes abnormal, and the means of claim 4 generates the alarm from the alarm. A microphone for detecting the alarm sound and providing a feedback signal to the main controller is provided, and an alarm is periodically issued for a short time from the alarm device, and the alarm sound is received by the microphone and the entire device is checked for normality. It is like that.

According to a fifth aspect of the present invention, when an abnormality occurs in a device that detects the abnormality, the alarm device that generates the alarm issues an alarm with a different tone or emission color for each device. Further, the means of claim 6 is provided with a device for performing multiplexing and mismatch detection of an alarm device, and the means of claim 7 further comprises a device for detecting the abnormality when the abnormality is detected. When an alarm is generated, the alarm device that generates the alarm is configured to issue an alarm with a different tone or emission color for each device.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A debris flow detection device as an embodiment of a device for detecting a falling object on a slope according to the present invention will be described below with reference to the drawings. Although a wire type sensor is used as the sensor in this embodiment, an optical fiber type sensor, a vibration type sensor, and an acoustic type sensor may be used. Further, in this embodiment, the detection / warning is performed using the electric signal from the sensor, but the detection / warning may be performed using a signal such as light instead of the electric signal.

Reference numeral 1 denotes a wire type sensor (hereinafter simply referred to as a sensor) consisting of a single electric wire reciprocatingly mounted on a fixed member 1a installed on the slope of a mountain where debris flow is likely to occur, and a current value is measured at an intermediate point. Resistor 1b is connected. Reference numeral 1c denotes a voltage-dividing resistor connected in parallel with the resistor 1b, and reference numeral 1 'denotes another sensor having the same configuration as the above-described sensor 1 provided in large numbers along the slope.

Reference numeral 2 denotes a display which is illuminated when debris flow occurs and the sensors 1 and 1 'are cut off and when an abnormality occurs in the equipment, so that the illuminated color is different or flashes according to the situation. A plurality of types of light sources such as lamps are accommodated.

Reference numeral 3 denotes an annunciator installed at a work site or the like.
An alarm 3a for generating an alarm sound when 1 'is disconnected and when an abnormality occurs in the device, and a microphone 3b installed on a sound emitting surface of the alarm 3a to pick up a sound from the alarm 3a.
It is composed of Reference numeral 3 'denotes another alarm having the same configuration as the above-described alarm 3 installed at a site that is easily affected by debris flow, such as the work site. In addition,
A contactor 4 such as a relay is connected between the display 2 and the alarm 3a and a main controller 8 described later.

Reference numeral 5 denotes a backup power supply (battery) for supplying power to the main controller 8, the display 2, the alarm 3 and a sub-controller 9, which will be described later, in the event of a power failure or when the power outlet is unplugged. It is connected to an AC power supply via the vessel 6. Reference numeral 7 denotes a changeover switch for releasing the connection between the charger 6 and the AC power supply when the backup power supply 5 is fully charged.

Reference numeral 8 denotes a state in which the sensors 1 and 1 'are energized to detect a current value divided by the resistors 1b and 1c, and the sensors 1 and 1' are cut off by debris flow and no current flows. It is a main controller for supplying power to the indicator 2 and the alarm 3a to be detected to notify the occurrence of debris flow.

Reference numeral 9 denotes a sub-controller for performing an operation shown in a flowchart to be described later. The sub-controller 9 determines whether or not the sensors 1, 1 ', the display 2, the alarm 3a, and the backup power supply 5 are normal at all times or for a predetermined time (for example, 5 seconds).

Next, the operation of the sub-controller 9 will be described with reference to the flowchart of FIG. First, the main controller 8
It is determined whether or not the sensor 1 is normal as in the prior art (step S1). As a result, when the sensor 1 is disconnected due to the debris flow, the indicator 2 is blinked in red while the debris flow is generated, and The alarm 3a is continuously sounded (step S2).

If it is determined in step S1 that the sensor 1 is normal, it is determined whether the alarm 3a is normal. That is, the sub-controller 9 causes the main controller 8 to output a signal for sound emission. At this time, the sound is emitted if the alarm 3a is normal, and the microphone 3b picks up the sound and outputs the sound. And the output from the microphone 3b is obtained, it is determined that the alarm 3a is normal (step S).
3).

If it is determined in step S3 that the output from the microphone 3b cannot be obtained, the display 2 is blinked in white to warn that the alarm 3a has a failure or the like ( Step S4). The alarm 3
When a failure has occurred in a, another alarm device for warning that the alarm device 3a is abnormal may be sounded.

If it is determined in step S3 that the alarm 3a is normal, the sub-controller 9 determines whether the capacity of the backup power supply 5 detected by the main controller 8 is equal to or greater than a predetermined capacity. Is determined (step S5), and as a result of the determination, when it is determined that there is an abnormality, the display 2 is lit in white and the alarm 3a is emitted with an intermittent sound (step S6).

On the other hand, if it is determined in step S5 that there is no abnormality in the backup power supply 5, the main controller 8
Are determined to be operating normally, and whether the wiring state is normal is determined (step S7).
If it is determined that there is an abnormality, the display is turned on in red and the alarm 3a is emitted as an intermittent sound (step S).
8).

If no abnormality has occurred in step S7, the indicator 2 is turned on in green and the alarm 3a is sounded for a very short time (for example, one second) (step S9). Here, the reason why the display 2 and the alarm 3a are operated even though all the devices are normal is to notify a monitoring person that all the devices are operating normally.

If it is determined that the operation of all devices is normal, the system is initialized (step S).
10) Return to step S1, and repeat the above-described operation from step S1 continuously or after a predetermined time has elapsed.

In the above embodiment, when a wire sensor is used as a debris flow sensor, it is necessary that the wire has a strength that cannot be easily cut with a load smaller than the debris flow load. The cutting load is 30Kg to 500Kg, more preferably 50Kg.
Desirably, it is from Kg to 150 kg.

In the above-described embodiment, the resistors 1b and 1c are connected to the wires, and whether the wires are cut is determined by measuring the partial pressure of the resistors 1b and 1c. However, it is needless to say that the detection of the presence or absence of the wire cut can be performed without measuring the partial pressure.

Further, as a fail-safe measure when the hardware of the main controller 8 breaks down or a bug occurs in the software, a method of multiplexing various same CPUs has conventionally been adopted. However, this method has a drawback that the probability of simultaneous multiple failures is extremely high as compared with the heterogeneous redundancy method since the processing method of the multiplexed hardware and software is the same. Therefore, in a system in which the failure of the main controller 8 may immediately lead to a serious disaster, such as detecting a debris flow and issuing an alarm, the multiplexing of hardware and software must be based on a diversity structure. .

Next, an embodiment of a fail-safe blanking system having a diversity structure incorporated in the main controller 8 will be described with reference to FIG. This system is composed of three types of PLCs 10 to 12 which have different types of redundancy (hereinafter, referred to as “diversity structure”), a fail-safe logical product operation element 13 and a self-diagnosis device 14. And a control circuit 15 for turning on the operation permission signal, which is the signal output of the AND operation element 13, only when all the operation results of 10 to 12 are the same.

Since these three types of PLCs 10 to 12 have different hardware structures, the three types of PLCs 10 to 10
12 is very unlikely to cause a hardware failure at the same time. Further, since the software processed on each CPU is also different, the possibility that an operation permission signal is erroneously output due to a software bug (error) is extremely low.

Further, in a system using the PLCs 10 to 12, a malfunction due to a memory abnormality becomes a problem.
In the present system, each CPU has a multiplexed memory, and the self-diagnosis device 14 periodically checks the identity of all memories at the time of starting and operating the system. Further, since the AND operation element 13 used in this system is a fail-safe element, it does not output an ON signal by mistake when a failure occurs.

As described above, in the blanking system according to the present embodiment, the operation of the PLCs 10 to 12 is erroneously performed even if the hardware, software, or memory of the PLCs 10 to 12 is abnormal or faulty, and if the AND operation element 13 is faulty. A fail-safe blanking system that does not output a permission signal can be realized.

[0032]

As described above, the present invention provides a sensor for detecting the occurrence of debris flow, a controller for outputting a warning signal when a signal from the sensor is input, and an alarm device for generating a warning. Detection of whether or not an abnormality has occurred is always performed or at predetermined intervals, and when an abnormality occurs in the device, a warning that the abnormality has occurred is issued by a display or an alarm device. Therefore, the debris flow can be reliably detected.

Also, the device for detecting the abnormality includes an emergency power supply, which measures the voltage of the power supply and generates the alarm when the voltage is lower than a preset value. It is possible to call attention even when the power supply capacity is reduced or the power outlet is disconnected, and further, when an abnormality occurs in the device that detects the abnormality,
The alarm device that generates the alarm is configured to give an alarm with a different tone or emission color for each device, so even when an abnormality occurs, it is possible to instantly confirm which device has an abnormality, This has the effect that the device can always be kept in a normal state.

[Brief description of the drawings]

FIG. 1 is a system block diagram of a device for detecting a falling object on a slope according to the present invention.

FIG. 2 is a flowchart for explaining the operation of the above block diagram.

[Explanation of symbols]

 1, 1 'sensor 2 display 3, 3' alarm 3a alarm 3b microphone 5 backup power supply 8 main controller 9 sub controller

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[Procedure amendment]

[Submission date] May 15, 2001 (2001.5.1)
5)

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Figure 3

[Correction method] Added

[Correction contents]

FIG. 3 is a system block diagram of another embodiment.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Noriyuki Horii 1-4-6 Umezono, Kiyose-shi, Tokyo Inside the Industrial Safety Research Institute (72) Inventor Satoshi Tamate 1-4-6 Umezono, Kiyose-shi, Tokyo No. F-term in the National Institute of Industrial Safety F-term (reference) GG08 GG19 GG23 GG31 GG66

Claims (7)

[Claims] 1. A sensor for detecting an object descending on a slope, a main controller for outputting an alarm signal in accordance with a signal from the sensor, and an alarm device for generating an alarm in accordance with a signal from the main controller. When the main controller detects that an abnormality has occurred in any one of the sensors and alarms, the main controller sends a signal indicating that an abnormality has occurred in the device and issues an alarm. Slope descent object detection device. 2. The main controller transmits a signal to the sensor at all times or at a desired cycle, and
The apparatus for detecting a falling object on a slope according to claim 1, wherein the presence or absence of a feedback signal from the sensor or whether the feedback signal is within a range of a preset allowable value is detected. 3. The apparatus for detecting a falling object on a slope according to claim 1, wherein when the main controller becomes abnormal, the main controller is switched to a sub-controller. 4. A microphone for detecting an alarm sound generated from the alarm device and providing a feedback signal to the main controller, periodically issuing an alarm for a short time from the alarm device, and outputting the alarm sound by the microphone. The apparatus for detecting a falling object on a slope according to claim 1, wherein the whole apparatus receives the confirmation to confirm the normality. 5. The apparatus according to claim 1, wherein when an abnormality has occurred in the device that detects the abnormality, the alarm device that issues the alarm issues an alarm with a different tone or emission color for each of the devices. 2. The apparatus for detecting a falling object on a slope according to 1. 6. The apparatus for detecting a falling object on a slope according to claim 1, further comprising a device for multiplexing an alarm device and detecting a mismatch. 7. The apparatus according to claim 1, wherein when an abnormality occurs in the device that detects the abnormality, the alarm device that generates the alarm issues an alarm with a different tone or emission color for each of the devices. 2. The apparatus for detecting a falling object on a slope according to 1.