JPS62100051A - Digital remote control method - Google Patents

Abstract

PURPOSE:To minimize the interference between remote control systems and to prevent the recognizing error by making the section among the head pulse, the custom code and the instruction code into the pulse interval different from 0.1 and setting the transmitting sequence to the above-mentioned sequence. CONSTITUTION:The interval between a head pulse 14 and a custom code 12, and between the custom code 12 and an instruction 13 is the pulse interval different from the interval to show '0' and '1'. And the received and pulse 14, the custom code 12 and the instruction code 13 are recognized to be separate by spaces 15 and 16 as the pulse interval between respective pulses and codes. By the receiving sequence of these, respective are recognized. Thus, the interference and the radio interference with other system are prevented.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides information "OJ, r
Regarding a digital remote control method that distinguishes lJ and modulates the pulse at a specific frequency and transmits it,
In particular, it relates to digital remote control methods using custom-coded transmission codes.

[Conventional technology]

A typical remote control system is shown in Figure 2. In Fig. 2, l is a transmitting circuit that modulates a transmission code at a specific frequency and transmits it, 2 is a receiving circuit that processes the received signal, and 3 is a light emitting diode, etc. that receives the output of the transmitting circuit 1 as input. A light emitting section 4 is made up of a light emitting element, 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 an output to the receiving circuit 2.

In the remote control system configured in this way, first, the transmission circuit 1 encodes and modulates the information to be sent, and the light emitting section 3 converts it into an optical signal a and transmits it. Next, the transmitted optical signal a is received by the light receiving section 4, demodulated by the receiving circuit 2, and the command is decoded.

In a remote control system with such a configuration and function, the information rob and rlJ are distinguished by bit rO
As shown in FIG. 3, which is a pulse waveform diagram of J and rlJ,
This is done by two consecutive pulse intervals. That is, in FIG. 3, the short pulse interval 5 shown in fa) corresponds to rOJ, and the long pulse interval 6 shown in (b) corresponds to "1".

Conventionally, these "0" and "1" were combined into one word 7 by combining several bits in the transmission code format shown in Figure 4, and the type of instruction was distinguished according to the data code of this word 7. The method was adopted. Also,
To avoid interference with other remote control systems, some bits of the transmission code were assigned to custom codes, and the remaining bits were assigned to instruction codes. For example, if 3 bits of a 10-bit transmission code are custom code and 7 bits are instruction code, there are 8 (=2') independent systems with 128 (=27) instructions per system. can be configured.

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 is the code given to your system, execute the command.

[Problem that the invention seeks to solve]

In the conventional digital remote control method as described above, if the rOJ and NJ judgment criteria happen to be similar and the number of bits fails on the receiving side, interference will occur and it will no longer be possible to use it as a remote control. It has its drawbacks. Furthermore, when expanding custom codes and instruction codes, there is a problem in that recognition errors in one's own system or interference with other systems are likely to occur.

The present invention has been made in view of these points, and its purpose is to provide a digital remote control method that reduces interference between remote control systems and allows for a large number of independent remote control systems. There is a particular thing.

[Means for Solving Problem c] To achieve such an object, the present invention distinguishes information 1 "0" and "1" depending on the length of the two pulse intervals, and distinguishes between the leading pulse, custom code, and command. In the digital remote control method, which modulates and transmits a transmission code consisting of a code at a specific frequency, rO
J, rl", the custom code has a bit configuration that avoids interference between different systems, and the transmission order is the first pulse, the custom code,
They are arranged in order of instruction code.

[Effect]

In the present invention, on the receiving side, the first pulse in the transmission code, the custom code, and the instruction code are recognized as different depending on the pulse interval between each pulse and code, and each is recognized based on the order in which they are received. identify

〔Example〕

An embodiment of the digital remote control method according to the present invention will be described with reference to FIGS. 1 and 2.

In FIG. 1, 10 and 11 are bit intervals of t (=1 ms) and 2t, which indicate bit "0" and bit "1", respectively, 12 is a custom code composed of 7 bits, and 13 is 8 bits. 14 is a leading pulse with a pulse width of 8t, 15 is a space as a pulse interval to provide an interval between the leading pulse 4 and the custom code 12, and 16 is the custom code 12 and the instruction code 13 A space 17 is the repetition period of the transmission code, and the transmission code is composed of a leading pulse 14, a custom code 12, and an instruction code 13.

Next, the operation of this method will be explained. When transmitting a transmission code as a remote control signal on the transmitting side, first the leading pulse 14 is transmitted, followed by a 7-bit custom code 12.8-bit instruction code 13 is transmitted in this order.

Next, on the receiving side, in the reception standby state, the first pulse 14
is received, the width of this first pulse 14 is 8 ms, and the first pulse 14. Space 15 between custom code 12 is 4
ms, the signal being received is considered valid and the next custom code or instruction code is read. If the width of the leading pulse 140 or the space 15 does not satisfy the above conditions, the process returns to the reception standby state.

After reading the custom code and instruction code, the receiving side reads “0” when the pulse interval is 1m5 (=t) and 2ms (
= 2t), it is determined to be "1", and if the pulse interval is equal to or greater than the pulse interval determined to be "1", for example, 2.5 ms or more, it is determined how many bits the data received so far consists of, If it is 7 bits, the custom code is 12. If it is 8 bits, it is taken as the instruction code 13. Then, on the receiving side, if the 7-bit custom code 12 is the code designated for itself, the receiving side decodes the next 8-bit instruction code 13 and executes the instruction.

That is, on the receiving side, the leading pulses 14 . Custom code L2. Instruction code 13 for each pulse, space 1 as pulse interval between codes
5.16, they are recognized as separate, and each is identified by the order in which they are received.
Prevents interference and interference with other systems. for example,
Unlike the transmission code shown in Figure 1, custom code 1
If a remote control system exists in which the instruction code 2 is 6 bits and the instruction code 13 is 9 bits, the transmission code in this system is 15 bits like the transmission code shown in Figure 1, but the custom code 12 bits are Since the numbers are different, no interference occurs.

In the above embodiment, a case has been described in which the custom code 12 and the instruction code 13 have different numbers of bits, but they may have the same number of bits.

In the above embodiment, the bit interval 10 indicating rOJ is nt, the bit interval 11 indicating "1" is mt, the space 15 between the leading pulse 14 and the custom code 12 is βt, and the space 15 between the custom code 12 and the instruction code 13 is space 16
wok t , when the width of the first half L/s 14 is jt, n=l, m=2. J=to=4. Although the case of j=8 is shown, these values are integers and n<m<l≦≦
As long as it is j, it can be taken in any way.

In addition, in the above embodiment, the width of the first pulse 14 is 3 ms on the receiving side, and the width of the first pulse 14 and the custom code 12 are
Although the received signal is considered valid if the space 15 between the pulses is 4 ms, the length of the space 15 may be set to be equal to or longer than the pulse interval determined to be "1", for example, equal to or longer than 2.5 ms.

Further, in the above embodiment, the leading pulse 14. Custom code 12. The transmission codes are shown to be transmitted in the order of instruction code 13, but this order is as follows: first pulse 14, then instruction code 13.
．． A similar effect can be obtained using the custom code 12.

〔Effect of the invention〕

As explained above, the present invention provides an rOJ between the leading pulse and the custom code and between the custom code and the instruction code.
By setting the pulse interval to be different from the interval indicating I"IJ, by setting the bit configuration of the custom code to avoid interference between different systems, and by setting the transmission order to the first pulse, the custom code, and the instruction code, the custom code can be Corresponding systems can be identified, interference between remote control systems can be reduced, and the pulse interval between the first pulse and custom code and the pulse interval between custom code and instruction code can be detected to prevent recognition errors. In addition, by adjusting the pulse interval between the first pulse and the custom code or the pulse interval between the custom code and the instruction code, it is possible to expand the custom code or instruction code. By properly configuring the system, it is possible to prevent interference with other systems even when the system is expanded.

[Brief explanation of drawings]

Fig. 1 is a waveform diagram showing a transmission code to explain an embodiment of the digital remote control method according to the present invention, Fig. 2 is a system diagram showing a remote control system to explain the method, and Fig. 3 is information rOJ, rlJ
FIG. 4 is a waveform diagram showing a transmission code for explaining the conventional digital remote control method. 1... Transmission circuit, 2... Receiving circuit, 3...
Light emitting section, 4...Light receiving section, 10.11...Bit interval i, 12...Custom code, 13...Instruction code, 14...Start pulse, 15.16... ...
Space, 17...Repetition period.

Claims (8)

[Claims] (1) Information “0” or “1” depending on the length of the two pulse intervals
In the digital remote control method, a transmission code consisting of a leading pulse, a custom code, and an instruction code is modulated at a specific frequency and transmitted. The pulse interval is different from the interval indicating "0" and "1", the custom code has a bit configuration to avoid interference between different systems, and the transmission order is the first pulse, the custom code, and the instruction code. A digital remote control method characterized by: (2) The interval between two pulses is nt for “0” and m for “1”
t, the pulse interval between the first pulse and the custom code is lt, the pulse interval between the custom code and the instruction code is kt, and the width of the first pulse is jt, then n, m, l, k and j are integers and n<m<l≦k
The digital remote control method according to claim 1, characterized in that ≦j. (3) The interval between two pulses is t for "0" and 2 for "1", the pulse interval between the first pulse and the custom code and the pulse interval between the custom code and the instruction code is 4t, and the 3. The digital remote control method according to claim 2, wherein the width of the leading pulse is 8t. (4) The digital remote control method according to claim 3, characterized in that t=1 ms. (5) Information “0” or “1” depending on the length of the two pulse intervals
In the digital remote control method, a transmission code consisting of a leading pulse, a custom code, and an instruction code is modulated at a specific frequency and transmitted. The pulse interval is different from the interval indicating "0" and "1", the custom code has a bit configuration that avoids interference between different systems, and the transmission order is the first pulse, instruction code, and custom code. A digital remote control method characterized by: (6) The interval between two pulses is nt for “0” and m for “1”
t, the pulse interval between the first pulse and the custom code is lt, the pulse interval between the custom code and the instruction code is kt, and the width of the first pulse is jt, then n, m, l, k and j are integers and n<m<l≦k
The digital remote control method according to claim 5, characterized in that ≦j. (7) The interval between two pulses is t for “0” and 2t for “1”
Claim 6, wherein the pulse interval between the leading pulse and the custom code and the pulse interval between the custom code and the instruction code are 4t, and the width of the leading pulse is 8t. digital remote control method. (8) The digital remote control method according to claim 7, characterized in that t=1 ms.