JP2001007713A - Wireless transmission system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly transmit a signal from a transmitter to a receiver by preventing the collision of signals. SOLUTION: A wireless transmitter 1 sets a time starting from the transmission of a wireless signal until the reception of the wireless signal by a wireless receiver or longer as a transmission inhibiting time, and the wireless transmitter 1 inhibits the transmission of the wireless signal starting from the transmission of the wireless signal until the lapse of the transmission inhibiting time, and transmits the wireless signal whose transmission is inhibited, after the lapse of the transmission inhibiting time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless transmission system capable of reliably performing wireless communication.

[0002]

2. Description of the Related Art Conventionally, wireless transmission systems have
It is used in various fields, and is used for calls from customers in restaurants and the like. The customer operates buttons on a wireless transmitter (transmitter) installed on a table or the like.
Then, a wireless signal to which a table number or the like is added is transmitted, so that a wireless receiver provided in a kitchen or the like can receive the signal, display the table number or the like, and serve customers.

[0003] In the wireless transmission system, a device that outputs a contact signal is connected by wire as a wireless transmitter, and when a contact signal is input from the device, a wireless signal indicating the state of the device is transmitted. Some of them use a contact input type wireless transmitter, which is used for alarm notification. In this wireless transmitter, for example, a human body detection sensor is connected, and when this sensor detects a human body, a wireless signal is transmitted when a contact signal is input from the sensor. When the wireless receiver receives this signal, it reports that a person has
A ringer or an alarm sound is output, or a lamp or the like is turned on or blinked to notify a person at the receiver side.

FIG. 13 shows the operation at this time.
Here, a contact output type wireless receiver in which a device for inputting a contact signal is connected by wire is used as the wireless receiver. When the state of the input terminal of the contact input type transmitter changes from open to closed, an operation start command (ON) signal is transmitted, and when the state changes from closed to open, an operation stop command (OFF) signal is transmitted ((a), (b) )reference). This allows the receiver to:
An operation synchronized with the state of the input terminal on the transmitter side can be performed (see (c)).

FIGS. 14 (a) to 14 (e) show the operation when communication is performed between a transmitter and a receiver via a repeater. Here, as shown in (c) and (d),
It uses two repeaters (repeater 1 and repeater 2)
The repeater 2 receives only the signal from the repeater 1, and the receiver receives only the signal from the repeater 2.
Further, the repeater transmits the signal after a lapse of a predetermined time T from the reception of the signal, thereby preventing the relayed signal from being incorrectly transmitted due to collision of the signal.

[0006]

However, in the above-described conventional wireless transmission system, normal transmission to the wireless receiver may not be performed depending on the transmission timing from the wireless transmitter. FIG. 15 shows an operation in the case where the problem occurs.
The transmission of the signal has the same timing as the transmission of the OFF signal from the transmitter. This caused the signals to collide,
Since the receiver cannot receive the OFF signal, correct operation cannot be performed. Here, the receiver can receive signals from both the repeater 1 and the repeater 2. However, after receiving the ON signal from the repeater 1, the receiver does not receive the OFF signal. Will remain.

The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a wireless transmission system capable of preventing a signal collision and transmitting a signal from a transmitter to a receiver correctly. Aim.

[0008]

In order to achieve the above object, a wireless transmission system according to claim 1 of the present invention receives at least a wireless transmitter and a wireless signal transmitted from the wireless transmitter. And a wireless receiver. Here, the wireless transmitter includes a transmitter for a wireless call, a contact input type wireless transmitter, and the like. Further, the wireless receiver includes a wireless call receiver that outputs and displays the content of the signal when a wireless signal is received, a contact output wireless receiver, and the like. In this system, the transmitter and the receiver may communicate via one or more wireless repeaters.

[0009] The wireless transmitter sets the time from the transmission of the wireless signal to the reception of the wireless signal by the wireless receiver or a time longer than that time as the transmission inhibition time. Until the transmission prohibition time elapses, the transmission of the wireless signal is prohibited, and after the transmission prohibition time has elapsed, the wireless signal whose transmission has been prohibited is transmitted.

According to a second aspect of the present invention, there is provided a wireless transmission system for transmitting a wireless signal corresponding to the change at least when the input of the contact signal from the device outputting the contact signal is changed. It comprises a transmitter and a wireless receiver for receiving a wireless signal transmitted from the wireless transmitter. This system differs from claim 1 in that the transmitter is limited to a contact input type wireless transmitter. Devices connected to the contact input type wireless transmitter include various sensors and push buttons.

[0011] The wireless transmitter sets the time from transmission of the wireless signal to reception of the wireless signal by the wireless receiver or more than the time as a transmission inhibition time. Until the transmission prohibition time elapses, the transmission of the wireless signal is prohibited, and after the transmission prohibition time has elapsed, the wireless signal whose transmission has been prohibited is transmitted.

A wireless transmission system according to a third aspect of the present invention includes at least a wireless transmitter, a wireless repeater that receives a wireless signal transmitted from the wireless transmitter, and transmits the wireless signal after a predetermined time. And a wireless receiver for receiving a wireless signal transmitted from the wireless repeater. This system differs from claim 1 in that it is limited to communicating via a wireless repeater. The number of repeaters may be one or plural.

[0013] The wireless transmitter sets a time from transmission of the wireless signal to reception of the wireless signal by the wireless receiver or a time longer than the time as a transmission prohibition time. Until the transmission prohibition time elapses, the transmission of the wireless signal is prohibited, and after the transmission prohibition time has elapsed, the wireless signal whose transmission has been prohibited is transmitted.

[0014] Here, the transmission prohibition time is set to a time from when a signal is transmitted from a transmitter to when the signal reaches a receiver after passing through one or a plurality of repeaters.
A wireless transmission system according to claim 4, wherein at least when a contact signal input from a device that outputs a contact signal changes, a contact input type wireless transmitter that transmits a wireless signal corresponding to the change. A wireless relay that receives a wireless signal transmitted from the wireless transmitter and transmits the wireless signal after a predetermined time, and a wireless receiver that receives a wireless signal transmitted from the wireless relay. . This system differs from claim 2 in that it is limited to communicating via a wireless repeater.

The wireless transmitter sets a time from transmission of a wireless signal to reception of the wireless signal by the wireless receiver or more than the time as a transmission inhibition time. Until the transmission prohibition time elapses, the transmission of the wireless signal is prohibited, and after the transmission prohibition time has elapsed, the wireless signal whose transmission has been prohibited is transmitted.

A wireless transmission system according to a fifth aspect includes at least a wireless transmitter and a wireless receiver that receives a wireless signal transmitted from the wireless transmitter. This system has the same system configuration as that of the first aspect. The wireless transmitter sets the time from transmitting the wireless signal to the time when the wireless signal is received by the wireless receiver or more than the time as the transmission inhibition time.After transmitting the wireless signal, the transmission inhibition is set. Until time passes,
Prohibit the transmission of wireless signals, and when the transmission prohibition time elapses, if the first wireless signal and the last wireless signal whose transmission is prohibited are the same type of signal,
The first wireless signal is transmitted, and if the first wireless signal and the last wireless signal whose transmission is prohibited are different types of signals, the first wireless signal and the last wireless signal are transmitted.

According to a sixth aspect of the present invention, there is provided a wireless transmission system for transmitting a wireless signal corresponding to the change at least when the input of the contact signal from the device for outputting the contact signal is changed. It comprises a transmitter and a wireless receiver for receiving a wireless signal transmitted from the wireless transmitter. In this system, the equipment configuration of the system is the same as in claim 2.

The wireless transmitter sets the time from transmission of a wireless signal to reception of the wireless signal by the wireless receiver or at least the time as a transmission inhibition time. The transmission of the wireless signal is prohibited until the transmission prohibition time elapses, and when the transmission prohibition time elapses, if the first wireless signal and the last wireless signal prohibiting the transmission are the same type of signal. For example, if the first wireless signal that transmits the first wireless signal, and the first wireless signal and the last wireless signal that have prohibited transmission are different types of signals,
Transmit the first wireless signal and the last wireless signal.

A wireless transmission system according to a seventh aspect of the present invention includes at least a wireless transmitter, a wireless repeater that receives a wireless signal transmitted from the wireless transmitter, and transmits the wireless signal after a predetermined time, And a wireless receiver for receiving a wireless signal transmitted from the wireless repeater. This system has the same system configuration as that of the third aspect.

The wireless transmitter sets a time from transmission of a wireless signal to reception of the wireless signal by the wireless receiver or more than the time as a transmission prohibition time. The transmission of the wireless signal is prohibited until the transmission prohibition time elapses, and when the transmission prohibition time elapses, if the first wireless signal and the last wireless signal prohibiting the transmission are the same type of signal. For example, if the first wireless signal that transmits the first wireless signal, and the first wireless signal and the last wireless signal that have prohibited transmission are different types of signals,
Transmit the first wireless signal and the last wireless signal.

A wireless transmission system according to claim 8, wherein at least when the input of the contact signal from the device that outputs the contact signal changes, a wireless signal corresponding to the change is transmitted. A transmitter, a wireless repeater that receives a wireless signal transmitted from the wireless transmitter and transmits the wireless signal after a predetermined time, and a wireless receiver that receives a wireless signal transmitted from the wireless repeater Be composed. This system has the same system configuration as that of the fourth aspect.

The wireless transmitter sets a time from transmission of a wireless signal to reception of the wireless signal by the wireless receiver or more than the time as a transmission inhibition time. The transmission of the wireless signal is prohibited until the transmission prohibition time elapses, and when the transmission prohibition time elapses, if the first wireless signal and the last wireless signal prohibiting the transmission are the same type of signal. For example, if the first wireless signal that transmits the first wireless signal, and the first wireless signal and the last wireless signal that have prohibited transmission are different types of signals,
Transmit the first wireless signal and the last wireless signal.

According to a ninth aspect of the present invention, in the wireless transmission system according to any one of the first to eighth aspects, the wireless transmitter sets the transmission prohibition time to substantially the same as the legal minimum transmission prohibition time. It is characterized by. In order to comply with the law, the transmission prohibition time needs to be longer than the minimum transmission prohibition time.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an example of the internal configuration of a wireless transmitter 1 in the wireless transmission system of the present invention. In the figure, 10
Is a signal processing unit for controlling each unit,
Reference numeral 1 denotes a battery as a power supply, 12 denotes an operation unit including operation switches for mode switching and the like, 13 denotes an ID write unit that includes an EEPROM or the like, and writes an ID code assigned to the transmitter 1, and 14 denotes a transmitter. A transmission prohibition time setting unit for setting a transmission prohibition time to be described later, a channel setting unit 15 for setting a channel for wireless transmission, a display unit 16 including a liquid crystal display (LCD) or an LED lamp, and a signal processing unit 17. Reference numeral 10 denotes a subclock (for example, 32.768 MHz) which is an operation clock in the stop mode for suppressing power consumption during standby, and 18 denotes a main clock (for example, 3.6864 MHz) for normal operation of the signal processing unit 10.

The wireless transmitter 1 has a radio unit 20
An antenna 21 for transmitting a wireless signal, a radio transmission unit 22, a VCO 23 for controlling a transmission frequency,
A PLLIC 24 which is a phase control circuit of the VCO 23;
A reference clock 25 (for example, 12.8 MHz) for generating the frequency of the wireless signal. In the wireless transmitter 1, the signal processing unit 10 includes the operation unit 1
When the second call button or the like is operated, a wireless signal of a call signal is generated, and this signal is transmitted from the wireless transmission unit 22 through the antenna 21. The transmitted signal includes
The ID code read from the ID writing unit 13 is added thereto, and transmitted by the wireless transmission unit 22 whose oscillation is controlled by the VCO 23. When the wireless signal is transmitted, the display unit 16 displays the transmission and the content of the transmission.

Next, FIG. 2 is a block diagram showing an example of the internal configuration of the wireless receiver 3 in the wireless transmission system of the present invention. In the figure, reference numeral 30 denotes a signal processing unit configured by a CPU or the like, which controls each unit; 31, a display unit configured by a liquid crystal display or an LED lamp;
Is a frequency switching unit that switches and sets the frequency for wireless reception, 33 is an ID memory that is composed of an EEPROM or the like, and stores an ID code assigned to the receiver 3,
Reference numeral denotes a power supply unit that controls power supplied from a commercial power supply (AC 100 V). 35 is an ID stored in the ID memory 33.
A registration button operated when registering a code, etc., a test mode setting unit 36 operated to test the operation of the receiver 3 at the time of shipment, a low voltage detection unit 37, and an operation of the signal processing unit 30 Main clock (for example, 3.
6864 MHz).

When the low voltage detector 37 detects an instantaneous power failure of the power supply 34, the signal processor 30
The mode is switched to a mode in which power consumption is suppressed, and the display state of the display unit 31 is stored by a backup power supply (not shown) such as a battery, and the state is maintained. When the power failure is restored, the display is returned to the stored display state.

Radio section 5 for receiving wireless signals
In the case of 0, the signal received from the antenna 51 is received by the wireless reception unit 52 whose oscillation is controlled by the PLL control unit 55, demodulated by the demodulation unit 53, and the waveform of the signal is shaped by the waveform shaping unit 54. In this wireless receiver 3,
When a wireless signal transmitted from the wireless transmitter 1 is received via the wireless unit 50, a display corresponding to the content of the signal is displayed on the display unit 31 or a sound output unit (not shown)
Outputs a ring tone and the like from.

The wireless transmission system of the present invention comprises at least a wireless transmitter 1 (see FIG. 1) and a wireless receiver 3 (see FIG. 2) for receiving a wireless signal transmitted from the wireless transmitter 1. But
The wireless transmitter 1 sets the time from the transmission of the wireless signal to the reception of the wireless signal by the wireless receiver 3 or more than that time in the transmission inhibition time setting unit 14 as the transmission inhibition time. There is a feature in the point.

The transmission prohibition time is set in advance by the operation unit 12.
The expected time until the signal reaches the receiver 3 from the transmitter 1 is set while looking at the display on the display unit 16 by the operation or the like. Therefore, when the distance between the transmitter 1 and the receiver 3 is long and the relay 1 is used, the transmission prohibition time becomes longer as the distance becomes longer. However, in order to minimize the time lag between the transmission timing on the transmitter 1 side and the operation timing on the receiver 3 side and shorten the operation delay time, the minimum time of the above-mentioned expected time should be set as the transmission inhibition time. Is desirable, but a longer time may be set.

After transmitting the wireless signal, the transmitter 1 prohibits the transmission of the wireless signal until the transmission prohibition time elapses, and after the transmission prohibition time elapses, transmits the wireless signal whose transmission has been prohibited. Send. If there is no signal to be transmitted and there is no signal prohibiting transmission within the transmission prohibition time, when the transmission prohibition time has elapsed,
No signal is sent. On the other hand, during the transmission prohibited time,
If there are a plurality of transmission prohibited signals, those signals are transmitted in order after the transmission prohibition time has elapsed. However, the transmission immediately shifts to the transmission prohibition time by the transmission of the next signal, so that the transmission is performed after the transmission prohibition time elapses.

FIG. 3 shows the operation of the system when the transmission inhibition time t1 is set in the transmitter 1 as described above. After the operation start command (ON) signal, the operation stop command (OF
F) Signal is being transmitted. After transmitting the ON signal, the transmitter 1 transmits the OFF signal till the transmission prohibition time t1 elapses, even if the transmission signal of the OFF signal is issued within the time t1.
The transmission of the OFF signal is prohibited, and the transmission prohibition time t
After the lapse of 1, transmission of the OFF signal whose transmission has been prohibited is delayed by time t2 and transmitted.

Thus, even when the transmitter 1 tries to transmit a signal continuously, the signals do not collide with each other and the transmitted signal does not reach the receiver 3. Operation 3 is synchronized. Regulations stipulate that if transmission over a predetermined period of time (for example, 3 seconds) is intermittent, transmission must be stopped for a predetermined period of time (for example, 2 seconds). For this reason, it is necessary to make a determination at the time of executing transmission, whereas according to the present invention, the transmission inhibition time t1 is set,
Such a determination process becomes unnecessary. If the transmission prohibition time t1 is set to be substantially the same as the legal minimum transmission prohibition time (for example, 2 seconds), the time lag between the transmission timing on the transmitter 1 side and the reception timing on the receiver 3 side is reduced, and the operation is reduced. Discomfort can be reduced. However,
The transmission prohibition time t1 must be equal to or longer than a predetermined time (for example, 2 seconds) at which transmission must be stopped by law.

In FIG. 3, there are two types of signals transmitted from the transmitter 1, an ON signal and an OFF signal.
The present invention is not limited to this, and three or more types of signals may be transmitted. Further, the same type of signal may be transmitted continuously. In addition, such an operation is such that when the input of the contact signal from the device that outputs the contact signal changes, the transmitter 1 transmits a wireless signal corresponding to the change. (Described later with reference to FIG. 7). That is, the contact input type wireless transmitter 1A has a change in the input of the contact signal, and after the transmission of the wireless signal, until the transmission prohibition time t1 elapses, even if the input of the contact signal changes, the wireless signal is not transmitted. The transmission of the signal is prohibited, and after the transmission prohibition time t1, the wireless signal whose transmission has been prohibited is transmitted.

However, as described above, even when the transmission prohibited time t1 is provided in the transmitter 1, the transmission prohibited time t1 is provided for each signal to be transmitted if the number of the signals to be transmitted is continuous and the number increases. Transmission completion of all signals is delayed. FIG. 4 shows the operation at that time by taking as an example the case where the transmitter 1 is (a) a contact input wireless transmitter 1A that transmits a signal according to a change in the contact input of the sensor. The transmitter 1A transmits the state change of the first sensor during the transmission prohibition time t1 with a delay of time t2 and transmits the state change of the sensor (see the black star in the figure). , In order, after the transmission inhibition time t1 of the previous transmission signal has elapsed.

In the system of the present invention, in order to solve this problem, after transmitting the wireless signal, the wireless transmitter 1A prohibits the transmission of the wireless signal until the transmission prohibition time t1 has elapsed, and prohibits the transmission. If the first wireless signal whose transmission has been inhibited and the last wireless signal have the same type when the time t1 has elapsed, the first wireless signal is transmitted and the first wireless signal whose transmission is inhibited is transmitted. If the signal and the last wireless signal are of different types, the first wireless signal and the last wireless signal are transmitted.

That is, if there is no signal for inhibiting transmission during the transmission inhibition time t1, after the transmission inhibition time t1 has elapsed,
No signal is sent. If there is one signal whose transmission is prohibited during the transmission prohibition time t1, the first and last signals are the same.
Only the signal of is transmitted. If there are a plurality of signals during the transmission inhibition time t1 and the types of the first and last signals are the same, only the first signal is transmitted after the elapse of the transmission inhibition time t1, and the types of the first and last signals are changed. If they are different, the first signal and the last signal are transmitted after the transmission prohibition time t1 has elapsed. At this time, of course, the first signal is transmitted, and the last signal is transmitted after the transmission prohibition time t1 has elapsed. Further, if there is a signal for which transmission is prohibited within the transmission prohibition time t1, the transmission is similarly performed in order from the next signal after the last signal.

FIG. 5 shows the operation in this case.
After transmitting the ON signal, the wireless transmitter 1A prohibits transmission until the transmission prohibition time t1 elapses, and transmits the first signal (OFF signal) for which transmission is prohibited with a delay of time t2. I have. The change in the state of the sensor during the time t2 (see the black star in the figure) is ignored. Here, since the first and last prohibited wireless signals (see black circles in the figure) are different types of signals (OFF signal and ON signal), the ON signal is transmitted after the transmission inhibition time t1 due to the transmission of the OFF signal. Send

Specifically, the sensor is turned off when the window is opened.
If the security sensor goes into a state and turns on when closed, the transmission will not be performed even if the window is closed immediately after the window is opened by an intruder or the like immediately after closing the window to the monitoring state. Since the first prohibited signal (OFF signal) is always transmitted, the receiver 3 outputs an alarm or the like, which indicates that an intruder has been detected.

As a result, since unnecessary signals are not transmitted from the transmitter 1, efficient transmission can be performed, and consumption of the battery 11 can be suppressed. Further, the operations of the transmitter 1 and the receiver 3 can be synchronized early. Such an operation is performed in two types (ON signal and OFF signal).
Signal), but in order to be able to handle a plurality of types, the transmitter 1 determines whether or not there is one or more signals whose transmission is prohibited during the transmission prohibition time t1.
It is stored for each type of signal. Then, the transmission prohibition time t1
After the time elapses, the maximum and the signals for each type may be transmitted one by one in the order in which the transmission is prohibited.

The case where the transmitter is the contact input type wireless transmitter 1A has been described above.
The same applies to the wireless transmitter 1 of the type to which no device for outputting a contact signal is connected, as shown in FIG. That is, after transmitting the wireless signal, the transmitter 1 prohibits the transmission of the wireless signal until the transmission prohibition time t1 elapses, and prohibits the transmission when the transmission prohibition time t1 elapses. If the wireless signal and the last wireless signal are the same type of signal, the first wireless signal is transmitted, and if the first wireless signal and the last wireless signal that have prohibited transmission are different types of signals, Transmit the first wireless signal and the last wireless signal.

Next, FIG. 6 shows an example of a system configuration of a wireless transmission system using the contact input type wireless transmitter 1A. On the transmitter side, for example,
There are configurations as shown in (a) to (e). The contact signal output device 6 connected to the transmitter 1 includes various sensors such as a machine tool abnormality detection switch shown in (a), a security switch shown in (b), and a human body detection sensor shown in (c). ,
There are various push buttons for calling and the like shown in (d) and a door switch shown in (e).

The contact signal is a signal indicating that the contact has changed, as described above. In other words, if the connected device is the abnormality detection switch (a), an abnormality is detected. (B) indicates a state that is not detected as a state.
In the case of the security switch, the alarm state and the non-alarm state are indicated. In the case of the sensor (c), the state where the object is detected and the state where the object is not detected are indicated. (E) shows a state in which is pressed and a state in which it is not pressed.
In the case of the door switch, it indicates that the door is open and closed.

On the other hand, the receiver 3 outputs a ringing tone, a warning tone, or the like when receiving a wireless signal as shown in (f), or turns on or off a display window according to the content of the signal. A flashing wireless call receiver, as shown in (g), installed in a restaurant or the like, receives a signal transmitted from a wireless transmitter (not shown) installed in each table, outputs a ringing tone, A wireless service call receiver that displays a table number or the like on a window assigned to the transmitter, receives a signal from the transmitter 1 when a visitor is detected, and outputs a ringing tone, and the like.
As shown in (h), when a signal is received from the transmitter 1 or 1A, a contact signal is output to the contact signal input device 7 connected by wire, and the contact output wireless receiver 3A for operating the device is provided. There is. The devices 7 connected to the receiver 2C include a lighting control relay, a buzzer, a security camera, and the like.

FIG. 7 is a block diagram showing an example of the internal configuration of the contact input type wireless transmitter 1A in the wireless transmission system of the present invention. This transmitter 1A is provided with a terminal input section 19 for connecting the contact signal output device 6 by wire in addition to the configuration of the transmitter 1 shown in FIG. 1, and the other configuration is the same as that shown in FIG. . In this wireless transmitter 1A, when a contact signal is input from the terminal input unit 19, the signal processing unit 10 generates a wireless signal indicating the state of the connected device 6, and transmits this signal to the wireless transmission unit 2
2 through the antenna 21. The ID code read from the ID writing unit 13 is added to the transmitted signal, and the signal is transmitted by the wireless transmission unit 22 whose oscillation is controlled by the VCO 23. When the wireless signal is transmitted, the display unit 16 displays the transmission and the content of the transmission.

The transmitter 1A includes a contact signal output device 6
Various types of devices can be connected. Therefore, as a signal indicating that the contact has changed, an a-contact (make contact) indicating that the contact has been closed is input from the connected device. The operation unit 12 can set whether the contact is made or whether a contact b (break contact) indicating that the contact is opened is inputted. Also,
Devices to be connected include a device that performs a non-voltage contact input or a voltage contact input, and these can be set using the operation unit 12.

FIG. 8 is a block diagram showing an example of the internal configuration of the contact output type wireless receiver 3A. In addition to the configuration of the receiver 3 shown in FIG. 2, a contact input device 7 that inputs a contact signal and performs a desired operation is provided to the receiver 3A.
And a contact output unit 39 that outputs a contact signal to operate the device 7, a contact output stop timer 40 that counts the output time of the contact signal, and a toggle output mode, A contact output mode setting unit 41 for setting an input synchronous output mode and the like, and a contact output time setting unit 42 for presetting the contact signal output time are provided, and the other configuration is the same as that shown in FIG.

In this wireless receiver 3A, the radio unit 5
When a wireless signal transmitted from the wireless transmitters 1 and 1A is received via the “0”, a contact signal is output from the contact output unit 39 to the connected device 7. Next, FIG.
2 shows a configuration in a case where communication from the transmitter 1A to the receiver 3A is performed via the wireless repeater 8.

The wireless transmission system includes a contact input type wireless transmitter 1A for transmitting a wireless signal corresponding to at least a change in input of a contact signal from a device for outputting a contact signal, A wireless repeater 8 that receives a wireless signal transmitted from the wireless transmitter 1A and transmits the wireless signal after a predetermined time, and a wireless receiver 3A that receives a wireless signal transmitted from the wireless repeater 8 It is configured.

Here, an example is shown in which two wireless repeaters 8 are provided, and the receiver is constituted by a contact output type wireless receiver 3A. In addition, as a transmitter,
Similarly, when the wireless transmitter 1 shown in FIG. 1 is used, communication is performed with the transmitters 3 and 3A via the repeater 8. FIG. 10 is a block diagram showing an example of the internal configuration of the wireless repeater 8 in the wireless transmission system of the present invention. The repeater 8 includes a receiving unit 81, a transmitting unit 83, a power supply 84 for supplying power to each unit, and a channel setting unit 85 for setting a channel for transmission and reception. 1 has the same configuration as that of the receiver 3, and the transmission unit 83 has the same configuration as the transmitter 1 of FIG.

The receiving section 81 includes a signal processing section 810, a display section 811 and a frequency switching section 812 for switching and setting a frequency.
An ID memory 813 for storing an ID code assigned to the receiving unit 81, a registration button 814 for operating when registering an ID code in the ID memory 813, a low voltage detecting unit 815, a signal processing unit 810 And a main clock 816 for the above operation.

Further, radio section 820 for receiving a wireless signal converts the signal received from antenna 821 into
The signal is received by the radio receiving unit 822 whose oscillation is controlled by the PLL control unit 825, demodulated by the demodulation unit 823, and the waveform of the signal is shaped by the waveform shaping unit 824. Receiver 81
When the signal processing unit 810 receives the wireless signal transmitted from the wireless transmitters 1 and 1A via the radio unit 820, the signal processing unit 810 notifies the signal processing unit 830 of the transmission unit 83 by data output.

The transmitting unit 83 includes a signal processing unit 830, a mode switching unit 831 including operation switches, an ID writing unit 832 for writing an ID code assigned to the transmitting unit 83, a display unit 833, The sub clock 834 and the main clock 835 are provided. Also, the radio unit 840
An antenna 841 for transmitting a wireless signal;
A wireless transmission unit 842 and a VCO 84 for controlling a transmission frequency
3 and PLLIC which is a control circuit of the phase of the VCO 843
844 and a reference clock 845 for generating the frequency of the wireless signal.

In transmitting section 83, when data is input from receiving section 81, signal processing section 830 generates a wireless signal, and transmits this signal from wireless transmitting section 842 to antenna 841.
To send through. The transmitted signal includes an ID writing unit 8
32, the ID code read from
The signal is transmitted by the wireless transmission unit 842 whose oscillation is controlled by the CO 843.

In the present invention, the wireless transmitter 1, 1A
Sets the time from transmission of the wireless signal to the reception of the wireless signal by the wireless receiver or more than the time as the transmission inhibition time t1 in the transmission inhibition time setting unit 14. As the transmission prohibition time t1, an expected time until a signal reaches the receiver 3 from the transmitters 1 and 1A via one or a plurality of repeaters 8 is set in advance. Therefore, in the case where the distance between the transmitter 1 and the receiver 3 is long and many relays 8 are used, the transmission inhibition time t1 becomes longer as the distance becomes longer.

After transmitting the wireless signal, the transmitters 1 and 1A prohibit the transmission of the wireless signal until the transmission prohibition time t1 elapses, and prohibit the transmission after the elapse of the transmission prohibition time t1. To send a wireless signal.
FIG. 11 shows the operation of the transmitter 1A. Here, the transmitter 1A operates with respect to the receiver 3A via two repeaters 8 (the repeaters 1 and 2). Start instruction (O
After the N) signal, an operation stop command (OFF) signal is transmitted. After transmitting the ON signal, the transmitter 1A changes the state of the sensor within the time t1 until the transmission prohibition time t1 elapses, and even if there is an instruction to transmit the OFF signal, the transmitter 1A transmits the OFF signal. The transmission is prohibited, and after the transmission prohibition time t1 has elapsed, the transmission of the OFF signal whose transmission has been prohibited is delayed by the time t2 and transmitted.

Thus, since the transmitter 1A does not transmit a signal while the relay 8 is relaying the signal, the signal transmitted by the repeater 8 and the signal transmitted by the transmitter 1A are different from each other. There is no case where the signal does not reach the receiver 3A due to the collision. Further, if transmission over a predetermined time (for example, 3 seconds) is intermittently stipulated by law, even if transmission must be stopped for a predetermined time (for example, 2 seconds), the transmission inhibition time t1 is set. Is set, there is no need to control transmission at the time of transmission to comply with regulations. If the transmission prohibition time t1 is set to be substantially the same as the legal minimum transmission prohibition time (for example, 2 seconds), the time lag between the transmission timing on the transmitter 1 side and the reception timing on the receiver 3 side is reduced, and the operation is reduced. Discomfort can be reduced. However, the transmission prohibition time t1
Must be longer than a predetermined time (for example, 2 seconds) at which transmission must be stopped.

[0058] Such an operation is also performed in the transmitter 1 shown in FIG. That is, after transmitting the wireless signal, the wireless transmitter 1 sets the transmission inhibition time t
Until 1 elapses, the transmission of the wireless signal is inhibited, and after the elapse of the transmission inhibition time t1, the wireless signal whose transmission has been inhibited is transmitted. Next, another operation of the wireless transmission system of the present invention is shown in FIG.

After transmitting the wireless signal, the wireless transmitter 1A prohibits the transmission of the wireless signal until the transmission prohibition time t1 elapses, and prohibits the transmission when the transmission prohibition time t1 elapses. If the first wireless signal and the last wireless signal are of the same type, the first wireless signal is transmitted, and the first wireless signal and the last wireless signal whose transmission has been prohibited are signals of different types. For example, the first wireless signal and the last wireless signal are transmitted.

That is, if there is no signal for inhibiting transmission during the transmission inhibition time t1, after the transmission inhibition time t1 has elapsed,
No signal is sent. If there is one signal whose transmission is prohibited during the transmission prohibition time t1, the first and last signals are the same.
Only the signal of is transmitted. If there are a plurality of signals during the transmission inhibition time t1 and the types of the first and last signals are the same, only the first signal is transmitted after the elapse of the transmission inhibition time t1, and the types of the first and last signals are changed. If they are different, the first signal and the last signal are transmitted after the transmission prohibition time t1 has elapsed. At this time, of course, the first signal is transmitted, and the last signal is transmitted after the transmission prohibition time t1 has elapsed. Further, if there is a signal to be inhibited within the transmission inhibition time t1, the signal is transmitted in order from the next signal in the same manner.

In the example shown in the figure, the wireless transmitter 1A
After transmitting the N signal, transmission is prohibited until the transmission prohibition time t1 has elapsed, and the first signal (OFF
) Is transmitted after delaying the time t2. The change in the state of the sensor during the time t2 (see the black star in the figure) is ignored, and the first and last prohibited wireless signals (see the black circle in the figure) are different types of signals (OFF signal and ON signal). Signal), the ON signal is further transmitted after the transmission prohibition time t1 due to the transmission of the OFF signal has elapsed. As a result, the transmitter 1A does not transmit a useless signal, so that efficient transmission can be performed and the operation with the receiver 3A can be synchronized at an early stage.

[0062] Such an operation is also performed in the transmitter 1 shown in FIG. That is, after transmitting the wireless signal, the wireless transmitter 1 sets the transmission inhibition time t
Until 1 elapses, prohibits the transmission of wireless signals,
If the first wireless signal whose transmission has been prohibited and the last wireless signal have the same type when the transmission prohibition time t1 has elapsed, the first wireless signal is transmitted and the transmission is prohibited. If the first wireless signal and the last wireless signal are different types of signals, the first wireless signal and the last wireless signal are transmitted.

[0063]

As can be understood from the above description, according to the first aspect of the present invention, in a wireless transmission system including at least a wireless transmitter and a wireless receiver, the transmitter transmits a wireless signal. After that, the time until the signal is received by the receiver or more than that time is set as the transmission prohibition time, and after transmitting the wireless signal, the transmitter waits until the transmission prohibition time elapses. Since the transmission of the signal is prohibited and the wireless signal whose transmission is prohibited is transmitted after a lapse of the transmission prohibition time, the transmitted signal is transmitted from the transmitter next before reaching the receiver. The signal can be reliably received by the receiver without colliding with the signal.

According to a second aspect of the present invention, in a wireless transmission system comprising at least a contact input type wireless transmitter and a wireless receiver, the transmitter transmits a wireless signal and then transmits the wireless signal to the receiver. The transmission time is set as the transmission prohibition time, or the transmission time is set as the transmission prohibition time.After transmitting the wireless signal, the transmitter prohibits the transmission of the wireless signal until the transmission prohibition time elapses. After the prohibition time elapses, the wireless signal whose transmission has been prohibited is transmitted, so that the transmitted signal does not collide with the next signal transmitted from the transmitter before reaching the receiver, ensuring that the transmitted signal does not collide. Can be received by the receiver.

According to a third aspect of the present invention, in a wireless transmission system including at least a wireless transmitter, a wireless repeater, and a wireless receiver, the transmitter transmits a wireless signal and then receives the signal. The time until the transmitter receives or longer than that time is set as the transmission prohibition time, and after transmitting the wireless signal, the transmitter prohibits the transmission of the wireless signal until the transmission prohibition time elapses. After the transmission prohibition time has elapsed, the wireless signal whose transmission has been prohibited is transmitted, so that the transmitted signal does not collide with the next signal transmitted from the transmitter before reaching the receiver, The signal can be reliably received by the receiver.

According to a fourth aspect of the present invention, in a wireless transmission system including at least a contact input type wireless transmitter, a wireless repeater, and a wireless receiver, the transmitter transmits a wireless signal, and then transmits the wireless signal. The time until the signal is received by the receiver or longer than that time is set as the transmission prohibition time.After transmitting the wireless signal, the transmitter prohibits the transmission of the wireless signal until the transmission prohibition time elapses Then, after the transmission prohibition time has elapsed, the wireless signal whose transmission has been prohibited is transmitted, so that the transmitted signal collides with the next signal transmitted from the transmitter before reaching the receiver. , And can be reliably received by the receiver.

According to a fifth aspect of the present invention, in a wireless transmission system including at least a wireless transmitter and a wireless receiver, the transmitter transmits a wireless signal, and the receiver receives the signal. The transmission time is set as the transmission prohibition time until the transmission prohibition time elapses after the transmission of the wireless signal. If the first and last signals whose transmission has been prohibited are of the same type when the time has elapsed, the first signal is transmitted, and the first and last signals whose transmission has been prohibited are signals of different types. If there is, the first and last signals are transmitted, so that the signal transmitted immediately before the start of the transmission prohibition time collides with the next signal transmitted from the transmitter before reaching the receiver. Without having to, it can be received by reliably receiver. Further, the states of the transmitter and the receiver can be synchronized early.

According to a sixth aspect of the present invention, in a wireless transmission system including at least a contact input type wireless transmitter and a wireless receiver, the transmitter transmits a wireless signal and then transmits the signal to the receiver. The transmission time is set as the transmission prohibition time, or the transmission time is set as the transmission prohibition time.After transmitting the wireless signal, the transmitter prohibits the transmission of the wireless signal until the transmission prohibition time elapses. If the first and last signals whose transmission has been prohibited are of the same type when the prohibition time has elapsed, the first signal is transmitted, and the first and last signals whose transmission is prohibited are of different types. If it is a signal, the first and last signals are transmitted, so the signal transmitted immediately before the start of the transmission prohibition time is transmitted from the transmitter next before reaching the receiver. Signal and without collision, it can be received by reliably receiver. Further, the states of the transmitter and the receiver can be synchronized early.

According to a seventh aspect of the present invention, in a wireless transmission system including at least a wireless transmitter, a wireless repeater, and a wireless receiver, the transmitter transmits a wireless signal and then receives the signal. The time until the device receives or the time longer than that is set as the transmission prohibition time.After transmitting the wireless signal, the transmission of the wireless signal is prohibited until the transmission prohibition time elapses. If the first and last signals whose transmission has been prohibited are of the same type when the time has elapsed, the first signal is transmitted, and the first and last signals whose transmission has been prohibited are signals of different types. If so, the first and last signals are transmitted, so the signal transmitted just before the start of the transmission prohibition time is transmitted from the transmitter before reaching the receiver. No. and without collision, it can be received by reliably receiver. Further, the states of the transmitter and the receiver can be synchronized early.

According to an eighth aspect of the present invention, in a wireless transmission system including at least a contact input type wireless transmitter, a wireless repeater, and a wireless receiver, the transmitter transmits a wireless signal and then transmits the wireless signal. The time until the signal is received by the receiver or longer than that time is set as the transmission prohibition time.After transmitting the wireless signal, the transmitter prohibits the transmission of the wireless signal until the transmission prohibition time elapses If the first and last signals for which transmission is prohibited are the same type of signal when the transmission prohibition time has elapsed, the first signal is transmitted, and the first and last signals for which transmission is prohibited are transmitted. If the signal is a signal of a different type, the first and last signals are transmitted, so the signal transmitted immediately before the start of the transmission prohibition time arrives before reaching the receiver. Without colliding with signals transmitted from the signal device can be received by reliably receiver. Further, the states of the transmitter and the receiver can be synchronized early.

According to a ninth aspect of the present invention, in each of the wireless transmission systems of the first to eighth aspects, the wireless transmitter sets the transmission prohibition time to substantially the same as the legal minimum transmission prohibition time. Therefore, the time lag between the transmission timing on the transmitter side and the reception timing on the receiver side can be reduced, and the discomfort of the operation can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an example of a configuration of a wireless transmitter.

FIG. 2 is a block diagram illustrating an example of a configuration of a wireless receiver.

FIG. 3 is a diagram showing an example of the operation of the wireless transmission system of the present invention.

FIG. 4 is a diagram illustrating a problem in operation of the wireless transmission system.

FIG. 5 is a diagram showing another example of the operation of the wireless transmission system of the present invention.

FIG. 6 is a diagram illustrating an example of a configuration of a wireless transmission system according to the present invention.

FIG. 7 is a block diagram illustrating an example of a configuration of a contact input type wireless transmitter.

FIG. 8 is a block diagram illustrating an example of a configuration of a contact output type wireless receiver.

FIG. 9 is a diagram showing an example of another configuration of the wireless transmission system of the present invention.

FIG. 10 is a block diagram illustrating an example of a configuration of a wireless repeater.

FIG. 11 is a diagram showing another example of the operation of the wireless transmission system of the present invention.

FIG. 12 is a diagram showing still another example of the operation of the wireless transmission system of the present invention.

FIG. 13 is a diagram illustrating an example of an operation of a conventional wireless transmission system.

FIG. 14 is a diagram illustrating another example of the operation of the conventional wireless transmission system.

FIG. 15 is a diagram showing a problem in operation of a conventional wireless transmission system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wireless transmitter 1A Contact input type wireless transmitter 14 Transmission inhibition time setting part 3 Wireless receiver 3A Contact output type wireless receiver 8 Wireless repeater t1 Transmission inhibition time t2 Transmission delay time

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Seiji Murao 1048 Odakadoma, Kadoma-shi, Osaka Matsushita Electric Works F-term (reference) 5C087 AA02 AA03 AA12 AA23 BB18 BB58 DD03 DD20 EE08 FF10 FF17 GG01 GG12 GG32 GG36 5K060 BB04 CC04 CC11 DD10 HH34 LL04

Claims (9)

[Claims] 1. A wireless transmission system comprising at least a wireless transmitter and a wireless receiver for receiving a wireless signal transmitted from the wireless transmitter, wherein the wireless transmitter transmits a wireless signal. , A time until the wireless signal is received by the wireless receiver or more than the time is set as a transmission inhibition time. After the wireless signal is transmitted, the wireless signal is transmitted until the transmission inhibition time elapses. A wireless transmission system, wherein a wireless signal whose transmission has been prohibited is transmitted after the transmission prohibition time elapses. 2. A contact input type wireless transmitter for transmitting a wireless signal corresponding to at least a change in an input of a contact signal from a device for outputting a contact signal, and A wireless transmission system comprising: a wireless receiver that receives a transmitted wireless signal, wherein the wireless transmitter transmits a wireless signal and waits for the wireless signal to be received by the wireless receiver or The transmission prohibition time is set to be equal to or longer than the time, and after transmitting the wireless signal, transmission of the wireless signal is prohibited until the transmission prohibition time elapses, and transmission is performed after the transmission prohibition time elapses. A wireless transmission system for transmitting a prohibited wireless signal. 3. A wireless transmitter, a wireless relay receiving a wireless signal transmitted from the wireless transmitter, and transmitting the wireless signal after a predetermined time, and a wireless signal transmitted from the wireless relay. A wireless transmission system comprising: a wireless receiver configured to receive a wireless signal, and the wireless transmitter transmits a wireless signal to the wireless receiver until the wireless receiver receives the wireless signal, or at least the time, The transmission prohibition time is set, and after transmitting the wireless signal, the transmission of the wireless signal is prohibited until the transmission prohibition time elapses. A wireless transmission system for transmitting a signal. 4. A contact input type wireless transmitter for transmitting a wireless signal corresponding to at least a change in the input of a contact signal from a device for outputting a contact signal, and A wireless transmission system configured to receive a wireless signal to be transmitted and transmit the wireless signal after a predetermined time, and a wireless receiver to receive a wireless signal transmitted from the wireless relay, The wireless transmitter sets a time from transmission of the wireless signal to reception of the wireless signal by the wireless receiver or more than the time as a transmission prohibition time, and after transmitting the wireless signal, Until the transmission prohibition time has elapsed, transmission of wireless signals is prohibited, and Wireless transmission system and transmits after a prohibition time, the wireless signal which has been prohibited to send. 5. A wireless transmission system comprising at least a wireless transmitter and a wireless receiver for receiving a wireless signal transmitted from the wireless transmitter, wherein the wireless transmitter transmits a wireless signal. , A time until the wireless signal is received by the wireless receiver or more than the time is set as a transmission inhibition time. After the wireless signal is transmitted, the wireless signal is transmitted until the transmission inhibition time elapses. If the first wireless signal and the last wireless signal whose transmission is prohibited are of the same type when the transmission prohibition time has elapsed, the first wireless signal is transmitted and transmitted. If the first wireless signal and the last wireless signal were different types of signals, Wireless transmission system and transmitting a first wireless signal and the last wireless signals. 6. A contact input type wireless transmitter for transmitting a wireless signal corresponding to the change when there is a change in the input of the contact signal from a device outputting the contact signal. A wireless transmission system comprising: a wireless receiver that receives a transmitted wireless signal, wherein the wireless transmitter transmits a wireless signal and waits for the wireless signal to be received by the wireless receiver or The transmission prohibition time is set as the transmission prohibition time, and the transmission of the wireless signal is prohibited until the transmission prohibition time elapses after the transmission of the wireless signal. If the first wireless signal and the last wireless signal for which the Transmitting the first wireless signal and the last wireless signal, wherein the first wireless signal and the last wireless signal, which have been prohibited from being transmitted, are different types of signals, the first wireless signal and the last wireless signal are transmitted. Transmission system. 7. At least a wireless transmitter, a wireless repeater receiving a wireless signal transmitted from the wireless transmitter and transmitting the wireless signal after a predetermined time, and a wireless signal transmitted from the wireless repeater A wireless transmission system comprising: a wireless receiver configured to receive a wireless signal, and the wireless transmitter transmits a wireless signal to the wireless receiver until the wireless receiver receives the wireless signal, or at least the time, The transmission prohibition time is set, and after transmitting the wireless signal, the transmission of the wireless signal is prohibited until the transmission prohibition time elapses, and the transmission is prohibited when the transmission prohibition time elapses. If the first wireless signal and the last wireless signal are of the same type, Transmitting the first wireless signal, and transmitting the first wireless signal and the last wireless signal if the first wireless signal and the last wireless signal for which transmission is prohibited are different types of signals; Wireless transmission system. 8. A contact input type wireless transmitter for transmitting a wireless signal corresponding to at least a change in an input of a contact signal from a device for outputting a contact signal, and A wireless transmission system configured to receive a wireless signal to be transmitted and transmit the wireless signal after a predetermined time, and a wireless receiver to receive a wireless signal transmitted from the wireless relay, The wireless transmitter sets a time from transmission of the wireless signal to reception of the wireless signal by the wireless receiver or more than the time as a transmission prohibition time, and after transmitting the wireless signal, Until the transmission prohibition time has elapsed, transmission of wireless signals is prohibited, and If the first wireless signal whose transmission has been prohibited and the last wireless signal have the same type when the stop time has elapsed, the first wireless signal is transmitted, and the first wireless signal whose transmission is prohibited is transmitted. If the signal and the last wireless signal are different types of signals, the first wireless signal and the last wireless signal are transmitted. 9. The wireless transmission system according to claim 1, wherein the wireless transmitter sets the transmission prohibition time to substantially the same as a legal minimum transmission prohibition time. Characterized wireless transmission system.