JPS62256545A - Digital remote control device - Google Patents

Abstract

PURPOSE:To detect whether a key is continuously depressed or redepressed if the same instruction code is continuously received in the reception side, by changing the interval of plural pulses constituting an end pulse in the transmission side in accordance with the number of times of transmission operation. CONSTITUTION:In the transmission side, the number of times of key redepression is counted by a one-bit or plural-bit counter to generate the end pulse having a pulse interval corresponding to the counted value in 1:1, and this end pulse is transmitted following a custom code 8 and an instruction code 9. In the reception side, the custom code 8, the instruction code 9, and an end pulse 11a, 11b, or 11c are received and decoded, and redepression of the key is discriminated to execute the instruction for a controlled system if the custom code 8 coincides with a custom code assigned to the reception side and the pulse interval of the end pulse is different from preceding received that. If the waveform of the end pulse coincides with preceding received that, redepression of the key is not discriminated and the instruction is not executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a digital remote control device, and particularly to one that performs transmission using a signal format having an end pulse indicating the end of transmitted data.

[Conventional technology]

A general remote control system is shown in Fig. 2. In Fig. 2, 1 is a transmitting circuit for modulating a transmission code at a specific frequency and transmitting it, 2 is a receiving circuit for processing the received signal, and 3 is a receiving circuit for processing the received signal. A light emitting section 4 is made up of a light emitting element such as a light emitting diode that receives the output of the transmitting circuit 1, and a light receiving section 4 is made up of a light receiving element such as a photodiode that receives the optical signal a from the light emitting section 3 and sends the output to the receiving circuit 2. Department.

FIG. 3 is a waveform diagram showing pulse intervals corresponding to information rOJ and rlJ, and 5 and 6 in the figure are pulse intervals corresponding to "OJ and rlJ, respectively.

FIG. 4 is a waveform diagram showing a conventional transmission code format. In the diagram, 8.9 is a custom code and an instruction code, respectively, and 7 is a word (word) of a transmission code consisting of a custom code 8° and an instruction code 9. ), 12 is the repetition period of the transmission code.

Next, the operation will be explained.

In the remote control system configured as shown in FIG. 2, first, the transmission circuit 1 encodes and modulates information to be sent, and the light emitting section 3 converts it into an optical signal a and transmits it. Next, this transmitted optical signal a is sent to the light receiving section 4.
The receiving circuit 2 receives the light, demodulates it in the receiving circuit 2, and decodes the command.

In a remote control system with such a configuration and function, the distinction between information 1rOJ and rlJ is based on the bit ro
As shown in FIG. 3, which is a pulse waveform diagram of b, rlJ,
This is done by a pulse interval of two consecutive pulses.

That is, in this FIG. 3, the short pulse interval 5 shown in FIG. 3(a) corresponds to "0", and the long pulse interval 6 shown in FIG. 3 (bl) corresponds to "1".

A method has been adopted in which rOJ and lJ are combined into one word 7 in the transmission code format shown in Figure 4, and the type of instruction is distinguished according to the data code of this word 7. Also,
To avoid interference with other remote control systems, some bits of the transmission code are assigned to custom code 8, and the remaining bits are assigned to instruction code 9. For example, 3 of the 10-bit transmission code When bits are used as custom codes and 7 bits are used as instruction codes, 8 (=2') types of independent systems can be constructed with 128 (-2') instructions per system. In addition, in FIG. 4, 8 indicates the repetition period of the transmission code.

When the transmitting side transmits a transmission code as shown in FIG. 4, the receiving side first decodes the custom code part of the received code, and then decodes the instruction code part. If the decoded custom code matches the code given to your system, it will cause the controlled object to execute the command.

[Problem that the invention seeks to solve]

Conventional digital remote control systems were configured as described above, so if a certain key is held down and the same transmission code is continuously issued, the optical signal a
If the optical signal a is temporarily interrupted due to an obstacle passing through the transmission path of It is not possible to distinguish whether the optical signal a is temporarily interrupted by keeping the button pressed, and this causes a problem in that the device malfunctions.

This invention was made to solve the above-mentioned problems, and it is a digital remote that can detect whether a key is being pressed continuously or if it is pressed again when the same command code is received continuously on the receiving side. The purpose is to obtain a control device.

[Means for solving problems]

The digital remote control device according to the present invention counts the number of times a transmitting operation such as pressing a key is performed on the transmitting side, and calculates the pulse interval of a plurality of pulses constituting an end pulse indicating the end of a transmission code by counting the number of times a transmitting operation is performed, such as pressing a key. The system is configured so that it is changed in one-to-one correspondence with the numerical value obtained, and is added to the end of the transmission code for transmission.

[Effect]

According to this invention, the number of transmission operations can be read from the interval by changing the pulse interval of the plurality of pulses constituting the end pulse on the transmission side according to the number of transmission operations. By comparing this with the number of transmission operations read from the previously received code, it is possible to detect whether the key is being pressed continuously or pressed again when the same command code is received continuously. becomes.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a waveform diagram of a transmission signal showing the transmission format of a digital remote control device according to an embodiment of the present invention. In the figure, 8.9 is a custom code and an instruction code, respectively, and 7 is the custom code 8.9. Instruction code 9
Transmission code words consisting of lla, llb, llc
is an end pulse having information on the number of transmission operations, and 12 is the repetition period of the transmission code.

The block configuration of the device of this embodiment is the same as that of the conventional device shown in FIG. A pulse interval setting means is provided for changing the pulse interval of a plurality of pulses constituting the end pulse so as to correspond one-to-one to the counted value.

Next, the operation will be explained. On the transmitting side, the number of times the key is pressed again is counted using a one-bit or multiple-bit counter, and an end pulse with a pulse interval that corresponds one-to-one to the counted value is generated.This end pulse is processed by custom code 8. Send after instruction code 9.

For example, in the example shown in FIG. 1, the counter counts the number of key operations as 1-2→3-1-2... and correspondingly, the end pulses 1la-11b→11 C-'
11a→1lb-... is transmitted.

On the receiving side, the custom code 8. Instruction code 9.
The end pulse lla or llbs receives and decodes 11C, and if the custom code 8 is the one that has been defeated by the custom code assigned to it, and the pulse interval of the end pulse is different from the one received earlier. For example, it determines that the key has been pressed again and causes the controlled object to execute the command.

If the waveform of the end pulse is the same as the one previously received, it is determined that the key should not be pressed again, and the command is not executed.

In addition, in the above embodiment, an example was shown in which the number of transmission operations is divided into three states, but this may be set in any way as long as there are multiple states, or the instruction code and end pulse may be separated in time. However, they may be placed close to each other in terms of time.

Further, in the above embodiment, the interval between two pulses constituting the end pulse is changed, but the number of end pulses may be three or more, and in this case, a set of multiple pulse intervals may be used. The alignment may be changed.

Furthermore, in the above embodiment, if the waveform (pulse interval) of the end pulse received this time is the same as the waveform of the end pulse received last time, the command is not executed. The condition may be changed to such that the command is not executed if the waveforms of the end pulse are both equal to the waveforms of the previously received command code and end pulse.

〔Effect of the invention〕

As described above, according to the digital remote control device according to the present invention, the pulse interval of the pulses constituting the end pulse is changed on the transmitting side, and information about the number of transmission operations such as pressing a key is added to the end pulse. Since the information is read by the receiving side, and when the same command code is received, it is possible to determine whether the key is being pressed continuously or if it is being pressed again.

[Brief explanation of drawings]

Fig. 1 is a waveform diagram showing the transmission format of a digital remote control device according to an embodiment of the present invention, Fig. 2 is a system diagram of a general remote control system, and Fig. 3 is a pulse diagram corresponding to the information rOJ, r1. FIG. 4 is a waveform diagram showing the conventional transmission formant. . DESCRIPTION OF SYMBOLS 1... Transmission circuit, 2... Receiving circuit, 3... Light emitting section, 4... Light receiving section, a... Optical signal, 5... Information "0"
”, 6... Pulse interval corresponding to information "1", 7... Transmission code word, 8...
Custom code, 9... Instruction code, lla, l
lb, llc...end pulse, 12...repetition period.

Claims (1)

[Claims] (1) In a digital remote control device that transmits an end pulse indicating the end of a transmission code after transmitting data, a counting means for counting the number of transmission operations such as pressing an input key on the transmitting side; A digital remote control device comprising pulse interval setting means for changing the pulse interval of a plurality of pulses constituting the end pulse in one-to-one correspondence with numerical values.