JPS62258532A - Digital remote control device - Google Patents

Abstract

PURPOSE:To decide the pressing state of a key when the same instruction code is received by sending a data while changing a pulse number constituting an end pulse at the sending side and adding information representing number of times of transmission operation such as depression of key to the end pulse. CONSTITUTION:The sender side uses a 1-bit or plural-bit counter to count the number of re-depression of a key thereby generating the end pulse having a pulse number corresponding one by one to the counted content, aud the end pulse is sent after a custome code 8 and an instruction code 9. The receiving side receives/decodes the custom code 8, the instruction code 9 and an endpulse 11a, 11b or 11c, and when the custom code 8 is coincident with the custom code assigned to itself and the waveform of the end pulse differs from the waveform received earlier, it is discriminated that the key is depressed again and the instruction is executed by a controlled system. If the waveform of the end pulse is the same as that received earlier, it is discriminated that no key re-depression exists 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]

-M type 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 4 consists of a light-emitting element such as a light-emitting element such as a light-emitting diode which inputs the output of the transmitting circuit 1, and 4 consists of a light-receiving element such as a photodiode that receives the optical signal a from the light-emitting part 3 and sends the output to the receiving circuit 2. This is the light receiving section.

FIG. 3 is a waveform diagram showing pulse intervals corresponding to information rOJ and rlJ, and 5.6 in the figure is a pulse interval 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 transmission code word (two words) 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(b) corresponds to "1".

A method is adopted in which these rOJ and rlJ are combined into one word 7 in a transmission code format as shown in Figure 4, and the type of instruction is distinguished according to the data code of this word 7. ing. Further, in order to avoid interference with other remote control systems, some bits of the transmission code are assigned to the custom code 8, and the remaining bits are assigned to the instruction code 9. For example, if 3 bits of a 10-bit transmission code are custom code and 7 bits are instruction code, there will be 8 (=2') independent types with 128-(=2') instructions per system. system can be configured.

Note that in FIG. 4, 8 indicates the repetition cycle 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 continuously received 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 transmission operation such as pressing a key is performed on the transmission side, and calculates the number of pulses of a plurality of pulses constituting an end pulse indicating the end of a transmission code. It is configured to change the counted value in one-to-one correspondence and add it to the end of the transmission code for transmission.

[Effect]

In this invention, the number of pulses constituting the end pulse is changed on the transmitting side according to the number of transmitting operations, and the receiving side can read the number of transmitting operations from the number of received end pulses. By comparing this with the number of transmission operations for 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. Become.

〔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
Words of transmission code consisting of lla, flb, 11-
c is an end pulse having information on the number of transmission operations, and 12 is a 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. 2, and the transmitting circuit on the transmitting side includes a 1-bit or multiple-bit counter that counts the number of times a transmitting operation such as pressing an input key is performed. (counting means) and a pulse number setting means for changing the number 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, an end pulse is generated with a number of pulses that corresponds one-to-one to the counted value, and this end pulse is converted into a custom code 8. Send after instruction code 9.

For example, in the example shown in FIG. 1, each time a key is pressed, the counter counts the number of key presses as 1-2-3-1-2, etc., and the corresponding end pulses 11 a-
=1 l b-=11 c-11a-1l b=...
Send.

On the receiving side, the custom code 8. Instruction code 9.
Receive and decipher the end pulse lla or llb or 11C, and if the custom code 8 matches the custom code assigned to you and the waveform (number of pulses) of the end pulse is the one received earlier. If different,
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, the command is not executed, assuming that the key is not pressed again.

In addition, in the above embodiment, an example was shown in which the number of transmission operations is classified into three states, but this may be set in any manner as long as it is plural. Further, although the instruction code and the end pulse are placed at temporally distant positions, they may be placed temporally close to each other.

In addition, in the above embodiment, if the waveform (number of pulses) 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 if the waveform of the end pulse is equal to the waveform of the last received instruction code and the end pulse, the command is not executed.

〔Effect of the invention〕

As described above, according to the digital remote control device of the present invention, it is possible to end the end pulse by changing the number of pulses that make up the end pulse on the transmitting side, and when the same command code is received, the key is pressed. It has the effect of determining whether you are continuing or pressing the button 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 interval. FIG. 4 is a waveform diagram showing the conventional transmission format. l... 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, llb
, llc...end pulse, 12...repetition period. Note that the same reference numerals in the figures indicate the same or equivalent parts.

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 number setting means for changing the number of pulses constituting the end pulse in one-to-one correspondence with a numerical value.