JP2000175273A - Remote controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the safety and the reliability by adopting an AND between a remote control signal and a power supply start signal for an operating condition of a load of a control object, configuring a load drive section with a plurality of drive switches, and providing a load short-circuit switch in parallel with the load so as to prevent malfunction due to an external noise and a fault or the like. SOLUTION: Only when both a power supply start signal and a remote control signal are received, a power supply start transistor(TR) 10 and load driving lower and upper stage TRs 12, 15 are turned on. Thus, contacts of a power supply start relay 11 and a load drive relay 17 are closed and contacts of a load short-circuit relay 16 are open, a current from a power supply 3 is supplied to a load 6, which is activated. Usually, both the terminals of the load are short-circuited. Then no electric shock is produced even when people are in contact with the load for installation or removal purpose or static electricity is generated across both the terminals of the load. Furthermore, even when either of the TRs 12, 15 is faulty, no malfunction is caused in the load. Thus, the safety is ensured and the remote controller can be operated for a long time even with a power supply of a small capacity.

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 a remote control device from malfunctioning, for example, for remotely blasting a blast.

[0002]

2. Description of the Related Art Generally, a remote control device is often installed in a place where a person cannot easily enter or a dangerous place.
Further, in many cases, the load to be controlled is a blast, and the operation of the load itself is dangerous. For example, in a case where a landslide occurs due to a disaster such as an earthquake, the road is blocked by the landslide buried in the landslide, and the landslide buried in the landslide is blown off by a blast to remove it. Because there is a danger of secondary disasters such as inducing landslides,
Bombs need to be detonated remotely. FIG. 6 is an example of a remote control device for remotely detonating a blast. 1 is a remote control device, 2 is a blast, and 40 is a detonation command device for remotely commanding a detonation. When a person operates a 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, a person can initiate the detonation in a safe place. However, when a person approaches a remote control device or a 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 as much as possible.

FIG. 7 is a block diagram showing a conventional remote control device. In FIG. 7, reference numeral 3 denotes a power supply of the remote control device;
Is a control unit that generates a signal for controlling the load by a remote control signal, 5 amplifies the control signal from the control unit 4,
The drive unit 6 that operates the load is a load to be controlled. When a remote control signal is generated by wireless operation or wired by remote control, a control signal is generated from the control unit 4, the signal is amplified by the driving unit 5, and the load 6 operates.

[0004]

The above conventional remote control device has the following problems.

When a pseudo signal due to noise or interference or interference is generated in the remote control signal line due to electromagnetic induction from the outside or the like, even though the remote control signal is not generated,
There is a possibility that the load is erroneously erroneously operated by the controller 4 as a remote control signal. Further, when a component constituting the control unit or the drive unit fails, the load may malfunction even though no remote control signal is generated.
Furthermore, if static electricity is generated when the remote controller and the load are installed and the remote controller and the load are electrically connected 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 a load malfunctions due to external noise, interference, failure, static electricity, and the like.

The present invention has been made to solve the above problems, and has as its object to provide a highly reliable and safe remote control device which does not malfunction due to external noise or a failure. I do.

[0008]

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

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a remote control device according to Embodiment 1 of the present invention.
In FIG. 1, reference numerals 3 to 6 are the same as those in the block diagram of the conventional remote control device. Reference numeral 7 denotes an amplifier that receives a power supply start signal, 8 denotes a power supply start switch that operates by the output of the amplifier 7, and 9 denotes a load short-circuit switch that is inserted in parallel with the load 6. In the driving unit 5, 31 is an inverter, 32 is an AND circuit of the power activation from the power activation switch 8 and the control signal from the control unit 4, 33 is the power activation from the power activation switch 8 and the output of the inverter 31 That is, a logical product circuit of the inverted control signal and the output signal is an amplifier that operates 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, the condition is a 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 electromagnetic induction or the like from the outside and the control unit 4 regards the signal as a remote control signal, there is no possibility that a load malfunctions unless a power supply start signal is input.

The load driving unit includes AND circuits 32, 3
If the switch 3 and the load short-circuit switch 9 do not operate normally, the load will not operate. From this, the drive unit is a redundant system,
If any one fails, there is no risk of load malfunction.

Further, since the load short-circuit switch 9 inserted in parallel with the load is normally short-circuited, even if it is touched by a person and static electricity is generated at both ends of the load, the load is short-circuited. There is no risk of malfunction.

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

Further, since the power is turned on only when the load is operated, long-time operation is possible even with a small-capacity power supply.

Embodiment 2 FIG. 2 is a diagram showing Embodiment 2 which is a specific example of the block diagram of FIG. In FIG. 2, 3 is a power supply, 6 is a load, 10 is a power supply starting transistor switched by a power supply start signal, 11 is a power supply starting relay which is controlled by the power supply starting transistor 10 and closes its contact when energized, and 12 is a remote control. A load driving lower-stage transistor that is switched by a control signal,
13 is a delay circuit for delaying the remote control signal, 14 is an inverter for inverting the output of the delay circuit 13, 15 is a load driving upper-stage transistor switched by the output of the inverter 14,
Reference numeral 16 denotes a load short-circuiting relay that is inserted in parallel with the load 6 and is controlled by the load driving lower-stage transistor 12, and a contact is opened when energized, and 17 is controlled by the load driving lower-stage transistor 12 and the load driving upper transistor 15. This is a load drive relay that closes its contacts when energized. Reference numeral 18 denotes a fuse which is inserted between the power supply 3 and the power supply starting relay 11 and blows when an excessive current flows. In FIG. 2, the control unit 4 of FIG. 1 is omitted.

The operation of FIG. 2 will be described. When the power supply start signal is not input, the power supply start transistor 1
Since 0 is off, the contact of the power activation 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 of the load shorting relay 16 is closed and the contact of the load driving 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 by external electromagnetic induction or the like, so that the load driving transistors 12 and 15 are turned on, and the load short-circuiting relay 1 is turned on.
Even if the contact No. 6 is open and the contact of the load driving relay 17 is closed, the contact of the power supply starting relay 11 is open, so that no current flows to the load, and there is no fear of a malfunction of the load.

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

Since the contact of the load short-circuiting relay 16 is closed when no power is supplied, the load is normally short-circuited at both ends of the load. For this reason, even if static electricity is generated at both ends of the load by touching for installation or withdrawal, there is no possibility that the load will malfunction.

The delay circuit 13 includes a load short-circuit relay 16
The contact of the load drive relay 17 is provided in order to avoid the ground fault of the power supply because both the contacts of the load drive relay 17 are turned on. Delayed to close.

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

Further, since the power is turned on only when the load is operated, long-time operation is possible even with a small capacity power supply.

Embodiment 3 FIG. FIG. 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 upper transistor 15 for driving the load, the lower transistor 12 for driving the load, the relay 16 for shorting the load, the relay 17 for driving the load, and the fuse 18 are the same as those in FIG. In FIG. 2, the power activation is performed by activating the power activation relay 11 from the power activation signal, whereas in FIG. 3, the power activation is performed by mechanical force, and the power activation switch 19 is turned on / off. Therefore, the power supply start switch 19 is a mechanical switch. The mechanical force is, for example, a case where a string or the like mechanically connected to the power supply start switch is pulled, or a case where the intruder hooks a wire for detecting the intruder and pulls it.

Embodiment 4 FIG. 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 activation relay 11, the delay circuit 13, the inverter 14, the load short-circuit relay 16, and the fuse 18 are the same as those in FIG. FIG. 2 shows that the load driving lower transistor 12 and the load driving upper transistor 15 control the load driving relay 17, whereas the load driving lower transistor 21 and the load driving upper transistor 20 of FIG. 6 are inserted at both ends.

Embodiment 5 FIG. FIG. 5 is a block diagram of a remote control device according to Embodiment 5 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 start switch 8 are the same as those in FIG. The load short-circuit switch 22 is a manual switch, while the load short-circuit switch 9 in FIG. 1 operates at the output of the AND circuit 33.

[0026]

As described above, according to the present invention, the safety of the conventional remote control device is insufficient, and the operating conditions of the load to be controlled are determined by the remote control signal and the power supply start signal. By using a logical product of the above and by configuring the drive unit of the load with a plurality of drive switches, and by providing a load short-circuit switch in parallel with the load, external noise, failure, static electricity, etc. There is an effect that a reliable and safe remote control device in which the load does not malfunction can be provided.

In addition, since the power supply is started when controlling the load, the limited power supply can be effectively used, and the operation period of the remote control device can be extended.

[Brief description of the drawings]

FIG. 1 is a block diagram of a remote control device according to 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 according to a fifth embodiment of the present invention.

FIG. 6 is a diagram illustrating an example of a remote control device for remotely detonating a blast.

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

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Remote control device, 2 explosives, 3 power supplies, 4 control units, 5 drive units, 6 loads, 7 amplifiers, 8 power start switches, 9 load short-circuit switches, 10 power start transistors, 11 power start relays, 12 loads Lower transistor for driving, 13 delay circuit, 14 inverter,
15 Load driving upper stage transistor, 16 Load short-circuit relay, 17 Load driving relay, 18 Fuse, 19
Power start switch, 20 load drive lower transistor, 21 load drive upper transistor, 22 load short-circuit switch, 31 inverter, 32 logical product circuit, 33
AND circuit, 34 amplifier, 40 detonation command device.

Claims (5)

[Claims] 1. A remote control device, comprising: a power source and a drive unit for driving the load by a remote control signal for remotely controlling a load to be controlled; a power start switch for starting the power source by a power start signal; A power supply AND circuit for performing an AND operation of the remote control signal and the power supply start switch output, an inversion circuit for inverting the remote control signal, and control for performing an AND operation between the power supply start switch output and the output of the inversion circuit An AND circuit, a load inserted between the power supply AND circuit and the control AND circuit, and a load short-circuit switch inserted in parallel at both ends of the load and operated by the control AND circuit output. A remote control device. 2. A remote control device comprising a drive unit for driving a load to be controlled by a power supply and a remote control signal to remotely control the load, a delay circuit for delaying the remote control signal, and a delay circuit output. An inverter for inverting
An upper switch for driving the load that receives the inverter output, a lower switch for driving the load that receives the remote control signal, and a coil unit inserted between the upper switch for driving the load and the lower switch for driving the load. Load drive relay, a power supply start switch that receives the power supply start signal, a power start relay having a coil unit that receives the power start switch output, and a contact point of the power start relay. And a load short-circuit relay inserted in parallel at both ends of the load and operated by the output of the lower switch for load driving, and a load inserted between the unit and a contact portion of the load driving relay. Remote control device. 3. A remote control device comprising a drive unit for driving a load to be controlled by a power supply and a remote control signal to remotely control the load, a delay circuit for delaying the remote control signal, and a delay circuit output. An inverter for inverting
An upper switch for driving the load that receives the inverter output, a lower switch for driving the load that receives the remote control signal, and a coil unit inserted between the upper switch for driving the load and the lower switch for driving the load. A load drive relay, a power supply start switch for operating the power supply with mechanical force, a load inserted between the power supply start switch and the contact portion of the load drive relay, A remote control device comprising: a load short-circuit relay that is inserted in parallel at both ends and that is activated by the output of the load driving lower switch. 4. A remote control device having a drive unit for driving a load to be controlled by a power supply and a remote control signal for remotely controlling a load to be controlled, a delay circuit for delaying the remote control signal, and a delay circuit output. An inverter for inverting
An upper switch for driving the load that receives the output of the inverter, a lower switch for driving the load that receives the remote control signal, a switch for starting the power that receives the start signal of the power, and the switch for starting the power. A power supply start-up relay having a coil unit having an output as an input, a load inserted between the load driving upper switch and the load driving lower switch, and a load driving lower stage inserted in parallel at both ends of the load; A remote control device comprising: a load short-circuit relay operated by a switch output. 5. A remote control device comprising a power source and a drive unit for driving the load by a remote control signal for remotely controlling a load to be controlled, a power start switch for starting the power source by a power start signal; A power AND circuit for performing an AND operation of the remote control signal and the output of the power activation switch; an inversion circuit for inverting the remote control signal; and a control logic for performing an AND operation of the power activation switch and the output of the inversion circuit And a load inserted between the power supply AND circuit and the control AND circuit, and a manual load short-circuit switch inserted in parallel at both ends of the load. Remote control device.