JPH0986869A - Method of transmission and reception in telecontroller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restore the system from impossibility of reception to normal control immediately at the time of recovery of reception by transmitting a code counter which makes an increment when the code changes from a transmitter, and outputting the control signal for operation when it recognizes the change of the received code and the counter from a receiver. SOLUTION: Whistle signals A equivalent to the start signals and stop signals of an objective device, whistle input start counter signals B corresponding to these, whistle code signals C, and whistle code counter signals D are transmitted from the side of a transmitter. The whistle counter signals D make increment when the whistle code signals C change. On the other hand, on the side of a receiver, the whistle signals F made of the whistle signals A of the transmitter are made at a little late timing, and whistle input start counter signals G, whistle input start signals H, whistle code counter signals I, and whistle code signals J are generated. At this time, the whistle code counter D outputs a control signal for operation when it recognizes that it has made an increment from 3 to 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telecontrol device used for controlling a radio operation of a crane or the like, and even if the transmission signal becomes unreceivable due to noise or the like, it immediately returns to normal control when reception is restored. The present invention relates to a possible transmission / reception method.

[0002]

2. Description of the Related Art In a conventional telecontrol device,
From the transmitter, a whistle signal (blown whistle input signal), whistle code (combination type of whistle signal), whistle input start signal (whistle signal off Point turned on), contact data (push button S)
Signal such as W, joystick code)
Wireless transmission is performed at a predetermined interval such as 0 msec. At the receiver,
The received signal is edited or unedited and a control signal for performing operations such as starting, advancing, retracting, and stopping is output to a target device such as a crane. Usually this output signal is
It is used to control the target device via a sequencer.

In such a conventional one-way telecontrol apparatus, various control signals are transmitted on the transmitter side.
In many cases, wireless transmission is repeatedly performed at a certain cycle to instruct the target device to perform control. On the other hand, on the receiver side,
As a fail-safe function, when a normal signal cannot be received for a certain time or longer, reception disconnection processing is often performed to turn off the output to the target device side. However, if the transmission signal is corrupted due to some reason, if the normal signal can be received once or more within a certain time, the reception interruption processing is not performed.

FIG. 2 shows a conventional transmission / reception example. Vertical broken lines indicate the timing of the transmitter-side output and the receiver-side input / output. The whistle signal A corresponding to the start signal and the stop signal of the target device, and the whistle input start signal E and the whistle code C corresponding to them are transmitted from the transmitter side. The whistle code C is transmitted at a timing delayed from the whistle signal A by a certain cycle, and is cleared when it is transmitted for two cycles. On the receiver side, the whistle signal F, which has received the whistle signal A of the transmitter, is generated at a slightly delayed timing, and the whistle input start signal H and the whistle code J are generated at the same timing as on the transmitter side. Then, the whistle code J on the receiver side becomes an output signal, and the start and stop of the target device are controlled.

By the way, even if a normal signal is transmitted from the transmitter side, the whistle code J on the receiver side may not operate normally and the target device may not be controlled for some reason. . For example, as shown in FIG. 3, the shaded area cannot receive due to noise. The activation code a by the whistle code C on the transmitter side can be received, and the whistle code J on the receiver side is received.
The target device has been activated with the activation code a of, but the whistle signal F on the receiver side, when the stop code b on the transmitter side is transmitted,
Neither the whistle input start signal H nor the whistle code J can be received, the stop code b cannot be output from the receiver, and the target device is not stopped. Even if the noise is eliminated and the signal can be received, the whistle code C on the transmitter side has been cleared, and therefore the receiver cannot output the stop signal.

Further, even if, for example, the activation code a is transmitted from the transmitter side by the following whistle code C and the receiver side can receive this, the activation code a before the reception cannot be continued. It is impossible to determine whether it is the start code a after receiving the stop code b.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a telecontrol device used for controlling wireless operation of a crane or the like, and even when the transmission signal becomes unreceivable due to noise or the like as described above, at the time of recovery from reception. It is an object of the present invention to provide a transmission / reception method capable of immediately returning to normal control.

[0008]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a one-way telecontrol device which operates by the output of a receiver which receives a signal from a transmitter,
The transmitter transmits a code determined for each operation content and a code counter that increments when the code changes, and the receiver indicates the received code and the change in the counter of the code counter. When it is recognized, a transmission / reception method in a telecontrol device is characterized in that a control signal for operation is output.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The method of the present invention will be described with reference to the example of FIG. Vertical broken lines indicate the timing of the transmitter-side output and the receiver-side input / output. From the transmitter side, a whistle signal A corresponding to a start signal and a stop signal of the target device, and a whistle input start counter B, a whistle code C, and a whistle code counter D corresponding thereto are transmitted. The whistle code C is, for example, activated,
It is a code defined for each operation content of the target device such as forward, backward, and stop. The whistle input start counter B increments corresponding to the long whistle, the short whistle, etc. of the whistle signal A. In this example, the long whistle of the activation signal is incremented from 5 to 6, and the short whistle is incremented from 6 to 7.

The whistle code C is transmitted at a timing which is delayed from the whistle signal A by a certain cycle and is not cleared unlike the conventional example. In this example, the activation code a is continuously transmitted until it changes to the stop code b of the next signal. Whistle chord counter D
Increments when the whistle code C changes. In this example, when the whistle code C changes to the activation code a, 2
3 to 4 and 3 to 4 when changing to a further stop code c
Has been incremented to.

On the receiver side, the whistle signal F, which has received the whistle signal A from the transmitter, is generated at a slightly delayed timing, and the whistle input start counter G, the whistle input start signal H, and the whistle code counter I
And the whistle code J is generated. The whistle chord counter I
It occurs at the same timing as the whistle code counter D on the transmitter side. Then, the start code a and the stop code b of the whistle code J on the receiver side serve as output signals to control the start and stop of the target device.

According to the method of the present invention as described above, even if the receiver becomes unreceivable for some reason, it is possible to immediately return to the normal control state when the reception is restored. For example, it is assumed that the shaded area in FIG. 1 is in a reception disabled state due to noise. When the target device is activated with the activation code a of the whistle code J on the receiver side, due to noise, a stop signal from the whistle code C or whistle code counter D on the transmitter side cannot be received, and it is in an unsuspended state. However, by eliminating the noise,
When the state returns to the receivable state, the whistle code J is the stop code b and the transmitter side whistle code counter D is 3 to 4
The stop signal is output by the stop code b of the whistle code J when the whistle code J is recognized. Then, it can be recognized that the stop code b is the stop code changed first from the start code a before the unreceivable.

In the method of the present invention, the operation content is "start".
When there are many "forward" and "reverse" in addition to "stop", each whistle code, for example, c for X forward, d for X backward,
A code "e" for Y forward and a code "f" for Y backward are sent, and this whistle code C is sent, and a whistle code counter D that increments when the code changes is sent. Then, the receiver receives the whistle code C and the whistle code counter D, and when the change in the received code counter I is recognized, outputs the above-mentioned signals for each operation.

Further, in the present invention, as the code determined for each operation content of the target device, a joystick code, a push button code, etc. can be adopted in addition to the above whistle code. The joystick code is a coded signal transmitted by tilting the joystick arranged on the operation panel on the transmitter side in the X direction or the Y direction in the + direction or the − direction, respectively. With one joystick, the target device can be operated in two directions, for example, left and right movement or up and down movement. The push button code is a signal coded by a combination of a plurality of push button switches.

[0015]

EXAMPLE A crane and a hook were wirelessly operated by the method of the present invention. On the transmitter side operation panel, one joystick for each left and right is provided, and the joystick code for operating the left and right movements of the crane and the left and right of the hook with the left joystick, and the forward and backward movement of the crane and the up and down movement of the hook with the right joystick, respectively. sent. The joystick code continued to be transmitted without being cleared, and the code counter that incremented when each joystick code changed was transmitted. When the receiver recognizes the change in the joystick code and the code counter, it outputs a signal to the crane device to control the operation of the crane and the hook.

In the conventional method, the transmitted joystick code is cleared after two cycles (240 msec) have passed, and the code counter is not transmitting. For this reason, when the reception is disabled due to noise generated from the motor or the like, the operation of the crane cannot be stopped, and an emergency stop measure is required. However, according to the above-mentioned method of the present invention, even if reception is temporarily disabled, normal control can be immediately restored when reception is recovered, and the conventional troubles are eliminated.

[0017]

According to the method of the present invention, in the telecontrol device used for controlling the wireless operation of the crane or the like, even if the transmission signal becomes unreceivable due to noise or the like, the normal control is immediately restored when the reception is recovered. Can be made.
Therefore, even if reception is temporarily disabled due to a noise or the like that disappears in a relatively short time, almost normal control can be performed.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example of the method of the present invention.

FIG. 2 is an explanatory diagram showing an example of a conventional method.

FIG. 3 is an explanatory diagram showing another example of a conventional method.

[Explanation of symbols]

 A, F ... whistle signal B, G ... whistle input start counter C, J ... whistle code D, I ... whistle code counter E, H ... whistle input start signal

Claims (1)

[Claims] 1. A one-way telecontrol device that operates by the output of a receiver that receives a signal from the transmitter, transmits a code determined for each operation content from the transmitter, and changes the code. A telecontrol device, which transmits a code counter to be incremented when it does, and a receiver outputs a control signal for operation when it recognizes the received code and a change in the counter of the code counter. How to send and receive in.