JP3427756B2 - Remote control device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fail-safe technique for preventing malfunction of a remote control device that remotely detonates an explosive material.

[0002]

2. Description of the Related Art Generally, a remote control device is often installed in a place where people cannot easily enter it or in a dangerous place.
In addition, the load to be controlled is often an explosive or the like, and the operation of the load itself is often dangerous. For example, in the case where a landslide occurs due to a disaster such as an earthquake, the road is blocked by the earth and sand that is buried by the landslide, and the earth and sand that is buried by the landslide are blown away by a blast to remove it, the blast will cause a Because there is a risk of secondary disasters such as landslides
It is necessary to detonate explosives remotely. FIG. 6 is an example of a remote control device that remotely detonates an explosive. Reference numeral 1 is a remote control device, 2 is an explosive, and 40 is a detonation command device by which a person remotely commands detonation. When a person operates the detonation command from the detonation command device 40, an activation signal is wirelessly input to the remote control device 1 to explode the explosive material 2. In this case, the person can remotely initiate the detonation in a safe place. However, when a person approaches the remote control device or the load due to installation or withdrawal, it is extremely dangerous that the load to be controlled malfunctions, and it is necessary to take measures to prevent it.

FIG. 7 is a block diagram showing a conventional remote control device. In FIG. 7, 3 is a power source of the remote control device, 4
Is a control unit that generates a signal for controlling the load by a remote control signal, and 5 amplifies the control signal from the control unit 4,
A drive unit that operates a load, and 6 is a load that is a control target. When a remote control signal is generated wirelessly or by wire by remote control, a control signal is generated from the control unit 4, amplified by the drive unit 5, and the load 6 is activated.

[0004]

The conventional remote control device as described above has the following problems.

When a pseudo signal due to noise or interference or interference is generated in the remote control signal line by electromagnetic induction from the outside, etc., even though the remote control signal is not generated,
The control unit 4 regards it as a remote control signal, and there is a risk that the load malfunctions. Further, if a component forming the control unit or the drive unit fails, the load may malfunction even if the remote control signal is not generated.
Furthermore, if static electricity is generated when the remote controller and load are installed and electrically connected to the remote controller during withdrawal,
Since the load may malfunction and people are approaching,
Very dangerous.

As described above, the conventional remote controller has a serious safety problem that the load malfunctions due to noise, interference, failure, static electricity, etc. from the outside.

The present invention has been made to solve the above problems, and an object thereof is to obtain a reliable and safe remote control device which does not malfunction due to external noise or failure. To do.

[0008]

A remote control device according to the present invention makes an operating condition of a load to be controlled a logical product of a remote control signal and a power supply start signal, and
The above problem can be solved by forming the drive unit of the load by a plurality of drive switches and by providing a load short-circuit switch in parallel with the load.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. Embodiments of the present invention will be described below with reference to the drawings. First Embodiment FIG. 1 is a block diagram of a remote control device showing a first embodiment of the present invention.
In FIG. 1, 3 to 6 are the same as the block diagram of the conventional remote control device. Reference numeral 7 is an amplifier that receives a power supply start signal, 8 is a power supply start switch that operates by the output of the amplifier 7, and 9 is a load short-circuit switch that is inserted in parallel with the load 6. In the drive unit 5, 31 is an inverter, 32 is a logical product circuit of power activation from the power activation switch 8 and a control signal from the control unit 4, 33 is power activation from the power activation switch 8 and output of the inverter 31. That is, a logical product circuit with the inverted signal of the control signal, and 34 is an amplifier for operating the load short-circuit switch 9 inserted in parallel with the load 6.

The operation of FIG. 1 will be described. Unless the power supply start signal is input, the power supply start switch 8 does not operate, so that the load 6 to be controlled does not operate because the power supply 3 is not turned on only by the remote control signal. In order for the load to operate, it is a condition that it is the logical product of the remote control signal and the power supply start signal. Therefore, even if noise is generated in the remote control signal line due to external electromagnetic induction or the like and the control unit 4 regards it as a remote control signal, there is no risk of malfunction of the load unless the power supply start signal is input.

Further, the load driving unit is composed of AND circuits 32, 3
If 3 and the load short-circuiting switch 9 do not operate normally, the load will not operate. From this, the drive unit is a redundant system,
Even if one of them fails, there is no danger of the load malfunctioning.

Since the load short-circuit switch 9 inserted in parallel with the load is normally short-circuiting the load, the load is short-circuited even if a person touches and static electricity is generated at both ends of the load for installation or withdrawal. There is no risk of malfunction.

As a result, highly reliable and safe remote control which does not malfunction due to external noise or failure can be performed.

Further, since the power is turned on only when the load is operated, even a small capacity power source can be operated for a long time.

Embodiment 2. FIG. 2 is a diagram showing a second embodiment which is a specific example of the block diagram of FIG. In FIG. 2, 3 is a power source, 6 is a load, 10 is a power source starting transistor that is switched by a power source starting signal, 11 is a power source starting relay which is controlled by the power source starting transistor 10 and its contacts are closed when energized, and 12 is remote. Load-driving lower-stage transistor that switches according to control signal,
13 is a delay circuit that delays the remote control signal, 14 is an inverter that inverts the output of the delay circuit 13, 15 is an upper transistor for driving a load that is switched by the output of the inverter 14,
Reference numeral 16 denotes a load short-circuit relay which is inserted in parallel with the load 6 and controlled by the load driving lower transistor 12 so that the contacts open when energized. 17 is controlled by the load driving lower transistor 12 and the load driving upper transistor 15. It is a load drive relay whose contacts close when energized. A fuse 18 is inserted between the power source 3 and the power source starting relay 11 and blows when an excessive current flows. The control unit 4 of FIG. 1 is omitted in FIG.

The operation of FIG. 2 will be described. When the power start signal is not input, the power start transistor 1
Since 0 is off, the contact of the power supply starting relay 11 is open. When the remote control signal is not input, the load driving lower transistor 12 and the load driving upper transistor 15 are both off, so that the contact point of the load short circuit relay 16 is closed and the contact point of the load drive relay 17 is open.

Therefore, when neither the power supply start signal nor the remote control signal is input, no current flows from the power supply 3 to the load, and the load does not operate. At this time, noise is generated in the remote control signal line due to electromagnetic induction from the outside, etc., the load driving transistors 12 and 15 are turned on, and the load short circuit relay 1
Even if the contact point 6 is open and the contact point of the load driving relay 17 is closed, the contact point of the power source starting relay 11 is open, so that no current flows through the load and there is no risk of malfunction of the load.

In order to operate the load, both the remote control signal and the power supply start signal are input. In that case, the contact of the power supply start relay 11 is closed and the contact of the load short circuit relay 16 is open. The contact of the drive relay 17 is closed, current flows from the power source 3 to the load 6, and the load is activated.

Since the contacts of the load short-circuit relay 16 are closed when there is no energization, both ends of the load are normally short-circuited. Therefore, even if static electricity is generated at both ends of the load by being touched by a person for installation or removal, there is no risk of malfunction of the load.

The delay circuit 13 is a load short circuit relay 16
The contacts of the load driving relay 17 are both in the ON state to avoid the ground fault of the power supply, so that the contact of the load driving relay 17 is always opened after the contact of the load shorting relay 16 is opened. Delayed to close.

Since the load driving relay 17 has redundancy so that it does not operate unless the load driving transistors 12 and 15 in the upper and lower stages are both turned on, even if one of the load driving transistors fails. There is no fear of load malfunction.

Further, since the power is turned on only when the load is operated, even a small-capacity power source can be operated for a long time.

Embodiment 3. 3 is a diagram showing a third embodiment of the present invention which is another specific example of the block diagram of FIG. The power supply 3, the load 6, the delay circuit 13, the inverter 14, the load driving upper stage transistor 15, the load driving lower stage transistor 12, the load short circuit relay 16, the load driving relay 17, and the fuse 18 are the same as those in FIG. In FIG. 2, the power source is activated by operating the power source activation relay 11 from the power source activation signal, whereas in FIG. 3, the power source activation is performed by mechanical force to turn on / off the power source activation switch 19. Therefore, the power supply starting switch 19 is a mechanical switch. The mechanical force means, for example, pulling a string or the like mechanically connected to the power activation switch, or a case where the intruder hooks and pulls a trap line for detecting the intruder.

Fourth Embodiment 4 is a diagram showing a fourth embodiment of the present invention which is another specific example of the block diagram of FIG. Power supply 3, load 6, power supply starting transistor 10,
The power supply starting relay 11, the delay circuit 13, the inverter 14, the load short-circuiting relay 16 and the fuse 18 are the same as those in FIG. While the load driving lower transistor 12 and the load driving upper transistor 15 control the load driving relay 17 in FIG. 2, the load driving lower transistor 21 and the load driving upper transistor 20 in FIG. It is inserted at both ends of 6.

Embodiment 5. Fifth Embodiment FIG. 5 is a block diagram of a remote control device showing a fifth embodiment of the present invention. Power supply 3, control unit 4, drive unit 5, inverter 31, AND circuit 3
2, 33, the load 6, the amplifier 7, and the power supply starting switch 8 are the same as those in FIG. The load short-circuit switch 22 is a manual switch, whereas the load short-circuit switch 9 of FIG. 1 operates at the output of the AND circuit 33.

[0026]

As described above, according to the present invention, it is possible to secure insufficient safety with the conventional remote control device, and the operating condition of the load to be controlled is controlled by the remote control signal and the power supply start signal. , The load drive section is composed of multiple drive switches, and the load short-circuit switch is installed in parallel with the load to prevent external noise, failure, static electricity, etc. This has the effect of providing a reliable and safe remote control device in which the load does not malfunction.

Further, since the power source is started when controlling the load, there is an effect that the limited power source can be effectively utilized and the operation period of the remote control device can be extended.

[Brief description of drawings]

FIG. 1 is a block diagram of a remote control device showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a second embodiment of the present invention.

FIG. 3 is a diagram showing a third embodiment of the present invention.

FIG. 4 is a diagram showing a fourth embodiment of the present invention.

FIG. 5 is a block diagram of a remote control device showing a fifth embodiment of the present invention.

FIG. 6 is a diagram showing an example of a remote control device that remotely detonates an explosive material.

FIG. 7 is a block diagram showing a conventional remote control device.

[Explanation of symbols]

1 remote control device, 2 explosives, 3 power supply, 4 control unit, 5 drive unit, 6 load, 7 amplifier, 8 power supply start switch, 9 load short-circuit switch, 10 power supply start transistor, 11 power supply start relay, 12 load Lower transistor for driving, 13 delay circuit, 14 inverter,
15 load drive upper transistor, 16 load short circuit relay, 17 load drive relay, 18 fuse, 19
Power supply start switch, 20 load driving lower transistor, 21 load driving upper transistor, 22 load shorting switch, 31 inverter, 32 AND circuit, 33
AND circuit, 34 amplifier, 40 detonation command device.

Claims (5)

(57) [Claims] 1. A remote control device comprising a drive unit for driving the load by a power supply and a remote control signal for remotely controlling a load to be controlled, and a power supply start switch for starting the power supply by a power supply start signal, A power supply AND circuit that performs a logical product of the remote control signal and the power start switch output, the power start switch output and the remote control signal.
A remote control device comprising: a control logical product circuit that performs a logical product with the inverted output of the signal; and a load short-circuit switch that is inserted in parallel across both ends of the load and that operates with the output of the control logical product circuit. 2. A remote control device comprising a drive unit for driving the load by a power source and a remote control signal for remotely controlling the load to be controlled, a delay circuit delaying the remote control signal, and the delay circuit. A load driving upper switch having an inverted output as an input, a load driving lower switch having the remote control signal as an input, and a coil portion inserted between the load driving upper switch and the load driving lower switch. Load driving relay, a power source starting switch having the power source starting signal as an input, a power source starting relay having a coil section having the power source starting switch output as an input, and both ends of the load in parallel. A remote control device, comprising: a load short circuit relay that is inserted and that operates with the output of the load lower switch. 3. A delay circuit for delaying the remote control signal in a remote control device comprising a drive unit for driving the load by a power source and a remote control signal for remotely controlling the load to be controlled, and the delay circuit. A load driving upper switch having an inverted output as an input, a load driving lower switch having the remote control signal as an input, and a coil portion inserted between the load driving upper switch and the load driving lower switch. Load driving relay, a power source starting switch for operating the power source with mechanical force, and a load short circuit relay inserted in parallel at both ends of the load and operating at the load driving lower stage switch output. A remote control device characterized in that 4. A delay circuit for delaying the remote control signal in a remote control device comprising a drive unit for driving the load by a power source and a remote control signal for remotely controlling the load to be controlled, and the delay circuit. A load driving upper stage switch having an inverted output as an input, a load driving lower stage switch having the remote control signal as an input, a power source starting switch having a power source starting signal as an input, and the power source starting switch A remote control device, comprising: a power supply starting relay having a coil portion having an output as an input; and a load short-circuiting relay that is inserted in parallel at both ends of the load and operates at the output of the load driving lower stage switch. . 5. A remote control device comprising a drive unit for driving the load by a power supply and a remote control signal for remotely controlling a load to be controlled, and a power supply start switch for starting the power supply by a power supply start signal, A power supply AND circuit that performs a logical product of the remote control signal and the output of the power start switch, and the power start switch and the remote control signal
A remote control device comprising: a control AND circuit that performs a logical product with an inverted output; and a manual load short-circuiting switch that is inserted in parallel at both ends of the load.