JP3498748B2 - Wireless control device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio control apparatus for performing remote control using an encoded radio signal. 2. Description of the Related Art As shown in FIG. 2, a wireless control device having a conventional actuator, for example, a wireless crane device, modulates encoded control data to transmit data to a transmitting antenna 2.
, A demodulator 4 for demodulating a signal received by the receiving antenna 3, a decoder 5 for decoding a demodulated output output from the demodulator 4, and a decoded signal output from the decoder 5. The control unit 6 includes a computer for inputting control data, and the crane device 7 in which the operation of the actuator is controlled by the control unit 6. And
If abnormalities occur continuously in the received data received by the receiving antenna 3 due to radio wave interference or the like and cannot be corrected continuously by the decoder 5, the control unit 6 urgently stops the actuation of the crane device 7 for safety. Was. [0003] However, in the above-mentioned wireless crane apparatus, if the actuator suddenly stops at the time of suspension swing, there is a risk that the wire swings greatly and the suspended load falls. . In particular, in the case of a boom undulating actuator, the danger is great because the instantaneous load at the time of stopping is extremely large. SUMMARY OF THE INVENTION It is an object of the present invention to provide a wireless control device that solves the above problem and reduces the risk of an emergency stop of an actuator. SUMMARY OF THE INVENTION The present invention is directed to a radio control for receiving encoded radio data output from a transmitter, decoding the received radio data by a decoder, and controlling an actuator. in the device, a control unit for decoding data and communication error detection signal outputted from the decoder to control which input operation of the actuator, a state from the communication error detection signal and the control unit from the decoder
Includes an AND gate circuit to which a signal is input, and a warning means that outputs from the AND gate <br/> preparative circuit is inputted, the
An alarm operation is performed by the AND gate circuit output being input to the alarm means, and the communication error detection signal output from the decoder after the alarm operation is performed is continuously input to the control unit. This stops the actuator. According to the present invention, the communication error detection signal output from the decoder is output to the alarm means only while the actuator is operating. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a wireless control apparatus according to the present invention. In FIG. 1, reference numeral 1 denotes a transmitter for modulating encoded control data and outputting it from a transmission antenna 2; A demodulator for demodulating the signal received in 3; a demodulator 5 for decoding the demodulated output output from the demodulator 4;
A decoder 6 outputs a frame error detection signal when a frame error is detected in the decoded data. The decoder 6 receives the control data of the actuator output from the decoder 5 and stores the operation state of the actuator on a memory to generate a state signal. A control unit comprising a computer for outputting, a crane device 7 whose operation of the actuator is controlled by the control unit 6, and a frame error detection signal output from the decoder 5 and a state signal output from the control unit 6 are input. An AND circuit 9 is an alarm device that performs audible and visual warning display based on the output of the AND circuit. Next, the operation will be described. The encoded control data of the actuator output from the transmitting antenna 2 of the transmitter 1 is received by the receiving antenna 3. The received control data is demodulated by the demodulator 4 and output to the decoder 5. The decoder 5 decodes the encoded control data and outputs an error of the decoded serial data to the control unit 6 after correcting the error. The control unit 6 controls the actuator of the crane device 7 based on the control data input from the decoder 5. On the other hand, when an error cannot be corrected and a frame error occurs, the decoder 5 outputs a frame error detection output “H” to the AND circuit 8. At this time, the control unit 6
Outputs a state signal “H” during which the actuator is operating, and the AND circuit 8 outputs an AND output “H” to the alarm device 9 when the two inputs match. The alarm device 9 gives a visual and audible warning to an operator or the like operating the transmitter that the actuator is to be stopped immediately. Thereafter, when a frame error from the decoder 5 continuously occurs, the control unit 6
Stops the actuator of the crane device 7 urgently.
Therefore, if the operator monitors the state of the alarm device 9, it is possible to predict that the communication state is not normal, so that the danger of an emergency stop can be prevented, and the communication state can be restored by the operator changing the location. As described above, according to the present invention, an alarm is issued before an emergency stop of the actuator.
An emergency stop can be known in advance, and safety can be improved. Further, it is possible to make the operator sense the deterioration of the communication state and to promote the improvement of the communication state.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing one embodiment of a wireless crane device according to the present invention. FIG. 2 is a block diagram of a conventional wireless crane device. [Description of Signs] 1 Transmitter 4 Demodulator 5 Decoder 6 Control unit 7 Crane device 8 AND circuit 9 Alarm

Claims (1)

(57) [Claim 1] A wireless control device for receiving encoded wireless data output from a transmitter, decoding the received wireless data by a decoder, and controlling an actuator. a control unit for controlling the operation of the actuator decoded data and the communication error detection signal output from the decoder is input, the state signal from the communication error detection signal and the control unit from the decoder input an aND gate <br/> over preparative circuits, said a warning means for outputting from the aND gate circuit is inputted, the alarm operation by the aND gate circuit output is input to the warning means is performed Stopping the actuator by continuously inputting the communication error detection signal from the decoder, which is output after the alarm operation is performed, to the control unit. A wireless control device characterized by stopping.