JPS6314599A - Digital remote control transmitter - Google Patents

Abstract

PURPOSE:To remove an interference between control systems by inserting an information pulse between synchronizing pulse strings of a constant cycle, performing the discrimination of 0, 1 according to the time interval of both pulses, further dividing a transmission code into a custom and an instruction and providing the two successive information pulses between both codes. CONSTITUTION:The custom code 12'1001' is fed and the information code 13 '110011' is transmitted by leaving a period 14 when the information pulse 22 continues two times. In such case, the number of the bits of the transmission code 15 is the same, one word length is constant. Since the transmission code 15 is divided into the custom 12 and the information 13 by a boundary 14, so that, even when the number of all the bits of the transmission code is the same, if the allocation of the number of the bits is changed, a code system having no mutual intervention can be formed and many independent remote control systems can be taken.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a digital remote control device.

[Prior art] -RM! The J-mote control system is shown in Figure 2. In Figure 2, (1) is a transmitting circuit that modulates the transmission code at a specific frequency and transmits it, (2) a receiving circuit that processes the R received signal J8, and (3) is a transmitting circuit (7).
), the light emitting section is composed of a light emitting element such as a light emitting diode, and (4) is the optical signal (a) from the light emitting section (3).
This is a light receiving section consisting of a light receiving element such as a 7-otodiode which receives the light and sends the output to the receiving port ii\r (2).

FIG. 3 is a waveform diagram showing pulse intervals corresponding to information 101, 'l''K, and in the figure, (5) is 10#, (
6) is the pulse interval corresponding to 111.

FIG. 4 is a Nu-type diagram showing the conventional transmission hood format, in which (12) is a custom code, (
13) is an instruction code, (15) is a word of the transmission code consisting of the custom code (12) and the instruction code (13), and (16) is the repetition period of the transmission code.

Next, the operation will be explained.

As shown in Fig. 2, in the north remote control system configured as I'i:, the information to be sent is first encoded and modulated by the transmitting circuit (1), and then sent to the light emitting section (3) as light +i = 4'. ;3(a) and send the price. 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 distinction between information 10" and '11 is made using the hint "Q".
As shown in FIG. 3, which is a pulse waveform diagram of # and #l#,
This is done by two consecutive Norms intervals. That is, in this FIG. 3, the short pulse interval (5) shown in (a) is 101, and the long pulse interval (6) shown in cb> is
) correspond to 111, respectively.

These 10# and '11 are combined into one word (
15), and the type of instruction is distinguished according to the data code of this word (15).

Furthermore, in order to avoid conflicts with other remote control systems, some bits of the transmission code are assigned to the custom code (12), and the remaining bits are assigned to the instruction code (13). In addition, in Fig. 4, (1
6) 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]

The conventional remote control transmission method is as described above, so the length of the word becomes shorter or longer depending on the desire of #O" (or 111) in the l word.
There was a problem in that the receiving side did not know the length of the l word, making it difficult to decipher the data.

In addition, since the boundary between custom code and instruction code is not clear, if the criteria for determining -1 "0#, #1' are similar and the number of bits of the l word matches, problems such as mutual interference may occur. there were.

This invention was made to solve the above-mentioned problems, and its purpose is to obtain a remote control transmission method in which the length of one word is constant and which can be used in many remote control systems. .

[Means for solving problems]

The digital remote control transmission system according to the present invention provides a synchronization pulse train with constant synchronization, inserts a data pulse between each synchronization pulse, and transmits 1-bit information #Q.
I, 111 are distinguished according to the time interval between the synchronization pulse and the data pulse, and the transmission code is further divided into a custom code and an instruction code, and two consecutive data pulses are inserted between the custom code and the instruction code. It was designed to be provided.

[Operation J] In this invention, data pulses are inserted between synchronization pulse trains with a constant period, and each bit is distinguished from IO "#1#" by the time interval between the data pulse and the synchronization pulse. Since there is a period in which two consecutive data pulses occur between the command code and the command code, the length of one word is constant, making it easy to decode the data. Furthermore, it reduces interference between remote control systems and allows independent control. Many remote control systems are available.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
In the figure, (11) is a period of 1 bit, (12) is a custom code, (13) is a data code, (14) is a period for separating the custom code and data code, (1
5) is one word of the transmission code, (16) is the repetition period,
(21) is a synchronization pulse, and (22) is a data pulse.

In this embodiment, the distinction between information "0' and 1" is based on the first
As shown in the figure, this is performed by the period from the rising edge to the rising edge (or from the falling edge to the falling edge) of the synchronization pulse and the next data pulse. That is, in this Fig. 1, if the period is 1 mB as in (23), nQI, (25)
2ms corresponds to 11" as shown in the following. Therefore,
The period of the synchronization pulse is 3ms.

Next, the operation will be explained. In the example shown in Figure 1, first, the custom code (12) is 1001 in the C example.
4 pintos), then a period (14) in which two consecutive data pulses are transmitted, and then a data code (3) is transmitted.
(6 bits of "110011" in the example) is transmitted.

In this case, if the number of bits of the transmission code (15) is the same, the length of l word is constant regardless of the number of data "O'" (or "1#"). In the example, if the pulse length of the synchronization pulse is 0.25m5, then 3m5Xll+0.25
m5 = 33.25m5.

Furthermore, by setting a boundary, the transmission code (15) is divided into the custom code (12) and the data code (13), so even if the overall pitch of the transmission code is the same, the custom code and data By changing the distribution of the number of code bits, it is possible to create a code system that does not interfere with each other. That is, many code systems can be created using transmission codes with the same number of bits.

In the above embodiment, the 8th period of the synchronization pulse train was defined as 3 ms, and the rise time interval between the synchronization pulse and the data pulse corresponding to bits "Q#" and "#l#" was defined as 1m512m8, respectively. If 'l' can be distinguished, it can be selected as a confession depending on the purpose.

Also, in the above example, the custom code (12) (!:
The period (14) for dividing the data code (13) is
Although only one cycle of the synchronization pulse is used, multiple cycles may be used depending on the purpose.

Furthermore, in order to improve the noise resistance of the transmission system, the synchronization pulse and the data pulse may be modulated at a certain frequency to narrow the frequency band and then be transmitted.

Furthermore, in order to make it easier for the receiving side to detect that the transmitted signal is distorted, a read pulse with a long pulse width may be inserted before the transmission code.

Furthermore, by changing the pulse widths of the synchronization pulse and the data pulse, it is possible to make it easier to distinguish between the respective pulses on the receiving side.

[Effects of the Invention] As described above, according to the present invention, in the remote control data transmission method, one focus of information #01, '
1' distinction is made according to the time interval between the synchronization pulses and the data pulses inserted between them, so that the length of the l word is constant, and also reduces interference between remote control systems, and This has the effect of allowing many independent remote control systems to be used.

[Brief explanation of drawings]

FIG. 1 is a waveform diagram showing a remote control transmission format according to an embodiment of the present invention and information x□a, e.
Waveform diagram showing the pulse interval corresponding to 1 m,! Figure 2 is a schematic block diagram of the remote control system, Figure 3 is a schematic block diagram of the remote control system.
FIG. 4 is a waveform diagram showing a conventional remote control transmission format, and FIG. 4 is a waveform diagram showing a conventional transmission code 7 format. In the figure, (1) is a transmitting circuit, (2) is a receiving circuit, (
3) is a light emitting part, (4) Ii light receiving part, (a) is an optical signal,
(5) is the pulse interval corresponding to #O#, (6) is the pulse interval corresponding to 1', (u) is the period of 1 bit, (
12) is a custom code, (13) is a data code, (
14) is a period for separating custom code and data code +11. (15) is one word of the transmission code, (1
6) is the repetition period, (21) is the synchronization pulse, (22
)i data pulse. Note that the same reference numerals in each figure indicate the same or corresponding parts. Figure 2 Figure 3

Claims (1)

[Claims] Information "0" and "1" are distinguished by the time interval between a synchronization pulse with a constant period and a data pulse inserted between these rows, and a custom code is generated by the combination of these information "0" and "1". A digital remote control transmission device comprising an instruction code, and a period in which at least two consecutive data pulses are provided between the custom code and the instruction code to distinguish the custom code from the instruction code.