JP3779022B2 - Device switching device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a device switching device in which a transmission signal for control is sent from a remote location to a plurality of devices, thereby allowing the plurality of devices to operate in sequence.
[0002]
[Prior art]
For example, in the case where control is performed from a remote location so that a plurality of devices are repeatedly operated in order, a method of sending a pulse-shaped transmission signal from the transmitter at a predetermined position at the timing at which each device starts operation is conceivable. However, in this case, the same pulse-shaped transmission signal is simultaneously received by a plurality of devices, and it is not possible to designate a specific device that enters an operation state. For this reason, the conventional device switching device is configured to identify the device to be operated.
[0003]
One of the methods is a method in which a coded signal is sent from the transmission side to identify a device that enters an operation state, the received data is decoded on the reception side, and a specific device operates based on the decoded result. is there. In this case, for example, a microprocessor is used for decoding the data.
[0004]
Another method is a method in which transmission signals having different frequencies are transmitted from the transmission side, and a combination of the transmitted frequencies is detected on the reception side, and a specific device operates based on the detection result.
[0005]
[Problems to be solved by the invention]
In the former method using a microprocessor, data is usually composed of a plurality of bits. For this reason, it takes time to decode the data and is not suitable for high-speed switching. In the case of the latter method using a plurality of types of frequencies, a transmission / reception circuit for processing a plurality of frequencies is required, and the circuit configuration increases.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described drawbacks, and to provide a device switching device that can perform high-speed switching and can be miniaturized.
[0007]
[Means for Solving the Problems]
The device switching device according to the present invention includes first to fourth devices that are sequentially in an operating state by the same predetermined time, first and third timings at which the first device and the third device are in an operating state, And a pulse-like transmission signal at each of a second timing earlier than the third timing and a fourth timing delayed from the third timing by a time shorter than the predetermined time. Transmitting means for repeatedly transmitting, a receiving means for sequentially receiving pulsed transmission signals transmitted from the transmission signal, and outputting first to fourth reception data corresponding to the first to fourth timings; and Rising at the first received data output from the receiving means, rising at the first data signal and the third received data falling at the second received data Data generating means for generating a second data signal that falls with the fourth received data; and rising from the first data signal and the second data signal in synchronization with the first data signal and the second data signal, Clock generating means for generating a clock signal that falls after the predetermined time from the rising edge, and a first identification signal that uses the clock signal and is at a high level between the falling edges of the adjacent clock signals, and is otherwise at a low level. And an identification signal generating means for generating a second identification signal having a high level between rising edges of the adjacent clock signals and a low level otherwise, and a high level and a low level of the first identification signal and the second identification signal. Control signal generating means for generating a control signal for setting the first to fourth devices to the operating state from the combination of levels It is equipped with.
[0008]
In addition, a pulsed transmission signal is transmitted by infrared rays.
[0009]
According to the above-described configuration, the first and third devices enter the operating state with respect to the first to fourth devices that are sequentially in the operating state by the same predetermined time and are in the non-operating state at other times. 1 and the third timing, the second timing earlier than the third timing by a predetermined time or more from the first timing, and the fourth timing delayed from the third timing by a time shorter than the predetermined time by the pulse timing. The transmission signal is repeatedly transmitted from the transmission means. On the device side, a control signal for setting the first to fourth devices to the operating state is generated from the pulsed transmission signal transmitted from the transmission means. In this case, the transmission means only needs to transmit, for example, a single-frequency pulsed transmission signal at a predetermined timing, and does not require coding for identifying a device that is in an operating state. Further, it is not necessary to send a plurality of types of frequencies as transmission signals. Therefore, it is not necessary to decode a multi-bit code or process a plurality of types of frequencies using a microprocessor or the like. Therefore, it is possible to realize a device switching device that can be switched at high speed and can be miniaturized.
[0010]
In addition, since the intervals of transmission signals transmitted in a pulse shape are not uniform, it is possible to determine, for example, the timing at which the first operating device enters the operating state by using such a difference in the intervals of the transmission signals. .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIG. Reference numeral 11 is a transmitter, and reference numerals 12a to 12d are four devices that are located at a location away from the transmitter 11 and whose operation states are controlled by transmission signals sent from the transmitter 11. The four devices 12a to 12d include a reception circuit 121, a data generation circuit 122, a phase lock loop circuit 123, a timing identification signal generation circuit 124, a control signal generation circuit 125, and the like.
[0012]
Each of the four devices 12a to 12d is in an operating state in order for the same predetermined time based on the transmission signal sent from the transmitter 11, and is set in a non-operating state at other times. For example, as shown in FIG. 2 (a), the devices 12a to 12d are each in an operating state in order at the same predetermined time t, that is, the times Ta to Td, and are not operating at other times.
[0013]
Then, the pulse signals Pa to Pd are transmitted from the transmitter 11 at the timing as shown in FIG. The pulse signal Pa is transmitted at the first timing T1 at which the device 12a enters the operating state, the pulse signal Pb is delayed by a predetermined time t from the pulse signal Pa, and the second timing T2 that is earlier than the device 12c enters the operating state. For example, it is transmitted at the center timing of the operation time Tb of the device 12b. The pulse signal Pc is transmitted at the third timing T3 when the device 12c enters the operating state. The pulse signal Pd is transmitted at a fourth timing T4 that is delayed from the pulse signal Pc by a time shorter than the predetermined time t, for example, at the center timing of the operation time Tc of the device 12c.
[0014]
Then, the pulse signals Pa to Pd as described above are repeatedly transmitted from the transmitter 11.
[0015]
The pulse signals Pa to Pd described above are received by the four devices 12a to 12d, respectively. In addition, since the structure and operation | movement of each apparatus 12a-12d are substantially the same, in the following description, the apparatus 12a is demonstrated and a different part is demonstrated about the other apparatuses 12b-12d.
[0016]
The device 12a receives the pulse signals Pa to Pd sent from the transmitter 11 by the receiving circuit 121, and first to fourth received data Ra corresponding to the first to fourth timings as shown in FIG. ˜Rd are generated and sent to the data generation circuit 122.
[0017]
The data generation circuit 122 includes a flip-flop circuit and the like, and generates a first data signal D1 and a second data D2 signal as shown in FIG. 2D based on the reception data Ra to Rd. The first data signal D1 rises at the first timing T1 when the reception data Ra is generated and falls at the second timing T2 when the reception data Rb is generated. The second data signal D2 rises at the third timing T3 when the reception data Rc is generated and falls at the fourth timing T4 when the reception data Rd is generated. Then, the first data signal D1 and the second data signal D2 are sent to the phase lock loop circuit 123.
[0018]
The phase lock loop circuit 123 has a phase lock function for generating a signal synchronized with an input signal and a function for generating a waveform that falls in a predetermined time after the signal rises. Then, as shown in FIG. 2 (e), the first and second clock signals C1 and C2 rising in synchronization with the first data signal D1 and the second data signal D2 and falling after the predetermined time t from the rising are obtained. Generate. The first and second clock signals C 1 and C 2 are sent to the timing identification signal generation circuit 124.
[0019]
The timing identification signal generation circuit 124 is, for example, a first identification signal S1 (FIG. 2 (f)) that becomes, for example, a high level between the falling edges of the adjacent clock signals C1 and C2, and becomes a low level otherwise, for example. Then, the second identification signal S2 (FIG. 2 (g)) is generated, for example, at a high level between the rising edges of the adjacent clock signals C1 and C2, and at a low level otherwise. Then, the first identification signal S1 and the second identification signal S2 are sent to the control signal generation circuit 125.
[0020]
In the control signal generation circuit 125, four control signals Qa to Qd (in the figure) that sequentially turn the first to fourth devices into an operation state from the combination of the high level and the low level of the first identification signal S1 and the second identification signal S2. 2 (h) to FIG. 2 (k)). For example, the first control signal Qa is generated when the first identification signal S1 is at a low level and the second identification signal S2 is at a high level. Further, the second control signal Qb is obtained when both the first identification signal S1 and the second identification signal S2 are at a high level, and when the first identification signal S1 is at a high level and the second identification signal S2 is at a low level. The fourth control signal Qd is generated when the third control signal Qc and both the first identification signal S1 and the second identification signal S2 are at a low level. These control signals Qa to Qd are sent to drive circuits (not shown) of the respective devices 12b to 12d, and the respective devices 12b to 12d enter into an operation state.
[0021]
For example, the device 12a is in an operating state while the first control signal Qa is generated in the control signal generation circuit 125. Similarly, the devices 12b to 12d are in an operating state while the second to fourth control signals Qc to Qd are being generated, respectively.
[0022]
In addition, since the pulse signals Pa to Pd are repeatedly transmitted from the transmitter 11, the above-described operations are sequentially repeated in each of the devices 12b to 12d.
[0023]
In the above-described embodiment, infrared light is used for the pulse signals Pa to Pd transmitted from the transmitter 11. However, other frequency bands such as microwaves other than infrared can be used.
[0024]
In addition, expressions such as rising and falling are used to describe the signal waveform. These do not necessarily correspond to a change in signal level from a high state to a low state, or from a low state to a high state. For example, when there are two levels of high and low, It means a change to the level. The expression high level or low level also means, for example, when there are two signal levels, high and low, and the high level necessarily corresponds to the high level and the low level corresponds to the low level. Not what you want.
[0025]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the switching apparatus of the apparatus which can be switched at high speed and can be reduced in size is realizable.
[Brief description of the drawings]
FIG. 1 is a circuit configuration diagram showing an embodiment of the present invention.
FIG. 2 is a waveform diagram for explaining the operation of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Transmitters 12a-12d ... Device 121 ... Reception circuit 122 ... Data generation circuit 123 ... Phase lock loop circuit 124 ... Timing identification signal generation circuit 125 ... Control signal generation circuit Ta-Td ... Time t when each device is in an operating state ... Time Pa to Pd in which each device operates ... Pulse transmission signals Ra to Rd ... Reception data D1, D2 ... Data signals C1, C2 ... Clock signals S1, S2 ... Identification signals Qa to Qd ... Control signals

Claims (2)

The first to fourth devices that are in the operating state in order for the same predetermined time, the first and third timings at which the first device and the third device enter the operating state, and the predetermined timing from the first timing Transmitting means for repeatedly transmitting a pulsed transmission signal at each of a second timing earlier than the third timing and a fourth timing delayed by a time shorter than the predetermined time from the third timing; Receiving means for sequentially receiving pulsed transmission signals transmitted from the transmission signal and outputting first to fourth received data corresponding to the first to fourth timings; and the first output from the receiving means 1st data signal rising at the reception data and falling at the 2nd reception data and rising at the 4th reception data Data generating means for generating a second data signal, and rising from the first data signal and the second data signal in synchronization with the first data signal and the second data signal, and rising after the predetermined time from the rising. A clock generating means for generating a clock signal that falls, and a first identification signal between the adjacent clock signals and the adjacent clock signals that are at a high level between the falling edges of the adjacent clock signals and at a low level otherwise. From the identification signal generating means for generating a second identification signal having a high level between rising edges and a low level otherwise, first to first combinations of the first identification signal and the combination of the high level and the low level of the second identification signal Device switching device comprising control signal generating means for generating a control signal for setting the fourth device to an operating state 2. The apparatus switching device according to claim 1, wherein the pulsed transmission signal is transmitted by infrared rays.

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