JPH09135185A - Wireless receiving system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wireless receiving system whereby the receiving frequency of an antenna system connected to a wireless reception controller is easily set and changed. SOLUTION: In the system, a wireless signal received by the antenna system 2 is transmitted to the wireless reception controller 1 with a signal line 3. Then, the system is constituted in such a way that the wireless reception controller 1 is provided with setting signal output means 11 and 16 transmitting a received frequency setting signal to the antenna system with the signal line 3 and the antenna system 2 is provided with wireless signal receiving means 22 and 23 receiving the wireless signal of the selected specified frequency and a received frequency setting means 21 selectively setting the frequencies of the wireless signal receiving means 22 and 23 based on the received frequency setting signal from the wireless reception controller 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless reception system, and more particularly to improvement of a wireless reception system configured by connecting an antenna device to a wireless reception control device via a signal line.

[0002]

2. Description of the Related Art A wireless reception system of this type uses a wireless communication to control a device in a distant place, a telemeter for reading a count value of a device in a distant place, an indoor disaster prevention system. The present invention is applied to a wireless communication system of a specific low power device such as a security system that receives a warning signal from a sensor or a crime prevention sensor.

A wireless receiving device that receives a wireless signal emitted from each wireless transmitting device is generally configured with a receiving antenna, but it may be necessary to add an antenna device to the wireless receiving device. . For example, when applied to a security system used in a three-story building and the wireless signal cannot reach different floors due to the small output of each wireless transmission device, the first floor and the second floor. It is necessary to install an antenna device on each of the third floor and wire-connect each antenna device to the wireless receiving device. A wireless receiving device to which such an antenna device is connected will be referred to as a wireless reception control device in the present specification regardless of whether or not a receiving antenna is built in.

In such a case, the wireless reception system is composed of a wireless reception control device and one or more antenna devices connected to the wireless reception control device via a signal line. The wireless signal emitted from the wireless transmission device is received by any of the above antenna devices, is wired-transmitted from the antenna device to the wireless reception control device via a signal line, and the wireless reception control device that receives this signal Based on the received signal, predetermined operations such as display and notification are performed.

[0005] In such a wireless communication system for a specific low-power device, the frequency channels that can be used are predetermined by law depending on the type of system such as tele-converter and security, and correspond to the type of system to be applied. It is necessary to select a specific frequency channel from the selected frequency channels and determine the frequency of the carrier signal for modulation / demodulation.

Therefore, the antenna device used in such a wireless receiving system is provided with a frequency input switch, and a specific frequency is selected from a plurality of frequencies by operating the frequency input switch. The antenna device is configured to be compatible with various wireless communication systems, and the antenna device is commonly used.

[0007]

Generally, since the wireless receiving device is configured with a receiving antenna, in the case of such a wireless receiving device, the frequency to be received can be set in the wireless receiving device. Thus, it is possible to receive a wireless signal having a desired frequency.

However, in the case of the above-described wireless reception system, the antenna device is connected to the wireless reception control device, and the reception frequency of each antenna device is
Since this is performed by the frequency input switch provided in each antenna device, when a plurality of antenna devices are connected, it is necessary to set each antenna device individually. Therefore, the work of setting and changing the frequency to be used becomes complicated. In particular, if each antenna device is installed at a distant place, this work becomes more complicated.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a wireless reception system capable of easily setting and changing the reception frequency of each antenna device.

[0010]

According to a first aspect of the present invention, there is provided a wireless reception system comprising a wireless reception control device and an antenna device connected to the reception device by a signal line. A wireless reception system for transmitting data to a wireless reception control device through the signal line, wherein the wireless reception control device includes setting signal output means for transmitting a reception frequency setting signal to an antenna device through the signal line. The antenna device includes a wireless signal receiving means for receiving a wireless signal of a specific frequency selected from a plurality of frequencies, and a wireless signal receiving means based on the receiving frequency setting signal from the wireless reception control device. And a reception frequency setting means for selectively setting the frequency.

A wireless receiving system according to a second aspect of the present invention is the wireless receiving system according to the first aspect, wherein the reception frequency setting signal is a system code indicating a type of a communication system to which the signal is applied. And a channel code indicating a frequency channel to be used. A wireless receiving system according to the present invention described in claim 3 is the wireless receiving system according to claim 1 or 2, wherein the setting signal output means of the wireless reception control device receives to the antenna device at predetermined time intervals. It is configured as a means for transmitting a frequency setting signal,
The antenna device is configured as a system that periodically sets the frequency of a wireless signal to be received. The above-mentioned predetermined time is a fixed time or a time according to this.

A wireless reception system according to a fourth aspect of the present invention is the wireless reception system according to the first or second aspect, wherein the setting signal output means of the wireless reception control device is the wireless reception system of the wireless reception control device. It is configured as means for transmitting a reception frequency setting signal to the antenna device after power-on, and configured as a system for setting the frequency of the wireless signal to be received by the antenna device after power-on of the wireless reception control device.

A wireless receiving system according to a fifth aspect of the present invention is the wireless receiving system according to the first or second aspect, wherein the setting signal output means of the wireless reception control device is the wireless reception control device of the wireless reception control device. It is configured as means for transmitting a reception frequency setting signal to the antenna device after reset, and is configured as a system for setting the frequency of the wireless signal to be received by the antenna device after reset of the wireless reception control device.

A wireless receiving system according to a sixth aspect of the present invention is the wireless receiving system according to the first or second aspect, wherein the setting signal output means of the wireless reception control device receives at the wireless reception control device. A system configured as means for transmitting a reception frequency setting signal to the antenna device each time the frequency is changed, and setting the frequency of the wireless signal to be received by the antenna device each time the reception frequency is changed in the wireless reception control device Configured as.

According to a seventh aspect of the present invention, there is provided a wireless reception system according to the first or second aspect, wherein the antenna device requests a reception frequency setting signal to the wireless reception control device. The setting signal output means of the wireless receiving device is configured as a system for transmitting the reception frequency setting signal based on the setting request signal from the antenna device.

A wireless receiving system according to the present invention described in claim 8 is the wireless receiving system according to claim 7, wherein the request signal output means of the antenna device controls the wireless reception after the reset of the antenna device. It is configured as means for transmitting a reception frequency setting signal to the device, and is configured as a system for setting the frequency of the wireless signal to be received by the antenna device after the reset of the antenna device. A wireless reception system according to the present invention described in claim 9 is the wireless reception system according to any one of claims 1 to 8, wherein the wireless reception control device transmits a frequency channel code transmitted from a wireless transmission device. A channel included in the communication control data, which is provided with a receiving antenna for receiving the communication control data, and is configured as means for receiving the communication control data by sequentially switching and demodulating a plurality of predetermined frequency channels. Based on the information, the reception frequency setting signal is sent from the wireless reception control device to the antenna device via the signal line.

A wireless receiving system according to a tenth aspect of the present invention is the wireless communication system according to the ninth aspect, wherein the wireless reception control device issues an ID code and a frequency channel code issued from the wireless transmitting device. And a reception antenna for receiving communication control data, reception frequency varying means for sequentially switching a carrier signal to a plurality of preset frequency channels, and communication of the received signal by the carrier signal from the reception frequency varying means. Wireless signal receiving means for demodulating to control data, storing means for registering the ID code and channel code demodulated by the wireless signal receiving means, and the above signal based on the channel code registered in this storing means Receiving to the antenna device via the line Configured with a setting signal output means for sending a wave number setting signal.

A wireless reception system according to the present invention described in claim 11 is the wireless reception system according to any one of claims 1 to 10, wherein the wireless reception control device uses an antenna device according to the frequency setting signal. Is configured as a means for setting a plurality of frequency channels, and the antenna device is configured as a multi-scan antenna device for sequentially switching and demodulating the set plurality of frequency channels to receive a wireless signal.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a system configuration of a wireless reception system according to the present invention described in claim 1. This wireless reception system is configured by connecting a wireless reception control device 1 and a plurality of antenna devices 2 with a signal line 3. The illustrated wireless reception control device 1 is configured to include a reception antenna 10, and each antenna device 2 connected to the wireless reception control device 1 is an expansion antenna device. It can also be applied to a system in which the control device 1 does not include the receiving antenna 10. In addition, the signal line 3
Is composed of a power line, a ground line and a data line, and the data line can be composed of a plurality of signal lines.

The wireless reception control device 1 sends a reception frequency setting signal to each extension antenna device 2 via a data line, and receives the extension frequency setting signal.
Sets the frequency of the wireless signal to be received based on this reception frequency setting signal. After the frequency of the wireless signal to be received is set in this way, when the extension antenna device 2 receives the wireless signal of the set frequency, the received data is sent to the wireless reception control device 1 via the data line. Sent out. The wireless reception control device 1 performs a predetermined operation based on this received data. For example, in the case of a security system, if the received data is a warning signal from a fire detector, a fire alarm is issued.

FIG. 2 shows an example of the configuration of the wireless reception control device 1 shown in FIG. This wireless reception control device 1
Is a receiving antenna 10, a signal processing unit 11, a wireless signal receiving unit 12, a reception frequency changing unit 13, a memory unit 14, a notification / display unit 15, an external interface unit 16, and a frequency input unit 17. It is composed of When the receiving antenna 10 receives a wireless signal emitted from a wireless transmission device (not shown), the received signal is input to the wireless signal receiving unit 12. The received signal is demodulated in the wireless signal receiving unit 12 and input to the signal processing unit 11.

The signal processing unit 11 is a circuit that controls the entire wireless reception control device 1 according to a program stored in the memory unit 14, and can be configured with a microcomputer together with the memory unit 14. When the reception data after the demodulation processing from the wireless reception unit 12 is input to the signal processing unit 11, the signal processing unit 11 sends a predetermined control signal to the notification / display unit 15 based on the reception data. This is output, and the notification / display unit 15 performs a predetermined notification and display.

Further, the signal processing section 11 includes a frequency input section 1
Based on the frequency set in 7, the control signal is output to the reception frequency varying unit 13. The reception frequency variable unit 13 is a frequency variable oscillation circuit that can select a specific frequency from a plurality of frequencies and generate a periodic signal of that frequency. Based on this, the carrier signal of the frequency set in the frequency input unit 17 is output. The demodulation process of the wireless signal receiving unit 12 is performed using the carrier signal generated in this way.

Further, the signal processing unit 11 performs wired communication with the extension antenna device 2 via the external interface unit 16. That is, for data transmission to the extension antenna device 2, the external interface unit 16 converts the transmission data output from the signal processing unit 11 and outputs the converted data to the signal line 3. On the other hand, when receiving data from the additional antenna device 2, the external interface unit 16 converts the received data on the signal line 3 and inputs it to the signal processing unit 11. In addition,
In the case of the wireless reception control device 1 that does not include the receiving antenna 10, the wireless signal receiving unit 12 and the receiving frequency changing unit 13 are unnecessary.

Next, FIG. 3 shows a structural example of the antenna device 2 shown in FIG. The antenna device 2 includes a receiving antenna 20, a signal processing unit 21, a wireless signal receiving unit 22, a receiving frequency changing unit 23, and a notification / display unit 25.
And an external interface 26, and does not include a frequency input section. When the receiving antenna 20 receives the wireless signal emitted from the wireless transmission device, the received signal is input to the wireless signal receiving unit 22. The received signal is demodulated by the wireless signal receiving section 22 and input to the signal processing section 21.

The signal processing unit 21 is a control circuit composed of a microcomputer and the like. When the signal processing unit 21 receives the demodulated reception data from the wireless reception unit 22, it receives the received data based on the received data. , Outputs a predetermined control signal to the notification / display unit 25,
However, the predetermined information is issued and displayed, and the reception information signal including the data of the wireless signal is transmitted to the wireless reception control device 1 through the signal line 3.

Further, the signal processing section 21 outputs a control signal to the reception frequency varying section 23 based on the reception frequency setting signal from the wireless reception control device 1 through the above-mentioned wired communication. The reception frequency variable unit 23 is a frequency variable oscillation circuit that can select a specific frequency from a plurality of frequencies and generate a periodic signal of that frequency. The reception frequency variable unit 23 receives the control signal from the signal processing unit 21. Based on this, the carrier signal of the frequency set in the wireless reception control device 1 is output. The demodulation process of the wireless signal receiving unit 22 is performed using the carrier signal generated in this way. That is, the signal processing unit 21 functions as a reception frequency setting unit. Here, for the data transmission to the wireless reception control device 1, the external interface unit 26
The transmission data output from the signal processing unit 21 is converted and output to the signal line 3, while the data reception from the wireless reception control device 1 is performed by the external interface unit 26.
Converts the received data on the signal line 3 into the signal processing unit 2
Enter 1

The basic operation of the wireless reception system composed of the wireless reception control device 1 and the antenna device 2 will be described below. The reception frequency of the wireless reception control device 1 is performed by operating the frequency input unit 17, but the antenna device 2 does not include a frequency input unit, and the reception frequency is set by the reception frequency setting signal from the wireless reception control device 1. To be done.

That is, the signal processing unit 11 of the wireless reception control device 1 generates a reception frequency setting signal based on the reception frequency set in the frequency input unit 17, and the external interface unit 16 causes the reception frequency setting signal to be generated. Is output to the antenna device 2. Therefore, the signal processing unit 11 and the external interface 1 of the wireless reception control device 1
6 functions as a setting signal output means.

When the external interface section 26 of the antenna device 2 receives this reception frequency setting signal, this reception data is input to the signal processing section 21. The signal processing unit 21 as the frequency setting unit can output a control signal to the reception frequency changing unit 13 based on the reception data to receive a wireless signal of a desired frequency.

In this way, the wireless reception control device 1
In addition to setting the frequency input in the frequency input unit 17 of the wireless reception control device 1,
It can also be set in the antenna device 2 connected by. Then, when one of the antenna devices 2 receives the wireless signal from the wireless transmission device, the signal processing unit 21 of the antenna device 2 generates a reception information signal, and the external interface 26 sends it to the wireless reception control device 1. Output.

When the external interface section 16 of the wireless reception control device 1 receives this reception information signal, it inputs this reception data to the signal processing section 11. The signal processing unit 11 uses the received data to notify / display unit 15
A control signal is output to and a predetermined notification or display is performed. With such a configuration, the reception frequency can be set without providing the frequency input unit in each antenna device 2, and the cost of each antenna device 2 can be reduced. Further, it is not necessary to set the reception frequency for each antenna device 2, and if the setting work is performed only in the wireless reception control device 1, the setting of all the antenna devices 2 is completed, and the work time is shortened. be able to. In particular, when a large number of antenna devices are installed or when they are installed over a wide range, the work time can be significantly shortened.

Next, a wireless receiving system according to the present invention as defined in claim 2 will be described below. FIG.
FIG. 3 is a diagram showing a configuration example of a reception frequency setting signal of the wireless reception system according to the present invention. As mentioned above,
For the wireless communication system of specified low power equipment,
By law, the range of frequencies that can be used is predetermined depending on the type of system such as a security system or a teleconverter / telemeter system. Therefore, if the type of system to be applied and the channel number corresponding to the type can be specified, the frequency to be used can be specified. Therefore, the reception frequency setting signal shown in FIG. 4 is configured to include the system type and the channel code.

That is, this reception frequency setting signal is composed of a start bit 40, 6-bit transmission data 41, a parity bit 42, and a stop bit 43. The start bit 40 is bit data for identifying the start of data transmission, and the stop bit 43 is
The parity bit 42 is bit data for identifying the end of data transmission, and the parity bit 42 is a bit for parity check. Further, the transmission data 41 is data indicating the contents to be transmitted, and the 1-bit system code 4
It is composed of a 10- and 5-bit channel code 411.

The system code 410 is data indicating the type of system. For example, it is "0" for a security system and "1" for a teleconverter / telemeter system. Also, the channel code 411 is
The data is a binary number indicating the channel number or the like to be used. For example, in the case of a telecon / telemeter system, it is any one of 10 channels from “0001” to “01010”, and in the case of a security system, It is any of 24 sets of channel combinations from "0001" to "11000", and each channel combination is a combination of 2 channels out of 48 channels. That is, "0001" indicates channels 1 and 25, and "11000" indicates channels 1 and 48. Therefore, in the case of a reception frequency setting signal in which the transmission data 41 is composed of channel codes other than these, it is invalid.

The signal processing unit 11 of the wireless reception control device 1 receives such a reception frequency setting signal from the frequency input unit 1
It is generated based on the setting of No. 7 and is output to the extension antenna device 2. In the antenna device 2 which has received the reception frequency setting signal, the signal processing unit 21 of the antenna device 2 transmits the transmission data 41.
The system code 410 and the channel code 411 of 1 are extracted, and the reception frequency is obtained by using the table that defines the relationship between these codes and the reception frequency.

Further, when a plurality of antenna devices 2 are connected to the wireless reception control device 1 and it is desired to set different frequencies for each antenna device 2, a unique address is preliminarily set for each antenna device 2. In advance, the wireless reception control device 1 may output the reception frequency setting signal to which the address is added to the signal line 3.

Next, a wireless receiving system according to the present invention as defined in claim 3 will be described below. The signal processing unit 11 of the wireless reception control device 1 according to the present invention is
It is configured by including timer means (not shown). The timer means is a means for repeatedly measuring a predetermined time, and is a time measuring means realized by software or hardware.

The signal processing unit 1 of the wireless reception controller 1
1 periodically generates a reception frequency setting signal based on the measurement result of the timer means, and sends it out from the external interface section 16. Therefore, the above-mentioned predetermined time is a time that determines the transmission interval when the reception frequency setting signal is periodically transmitted, and is a fixed time or a time corresponding thereto.

In this way, the wireless reception controller 1
By periodically outputting the reception frequency setting signal from, the reception frequency of the antenna device 2 can be always matched with the frequency set in the frequency input unit 17 of the wireless reception control device 1. Next, a wireless reception system according to the present invention as defined in claims 4 to 6 will be described below. Reference numerals 500 to 503 in FIG. 5 are flowcharts showing an example of basic operations of the wireless reception control apparatus 1 according to the present invention.

After the power of the wireless reception control device 1 is turned on and a sufficient time has passed, the reception frequency setting signal is sent from the wireless reception control device 1 to the antenna device 2 (500). On the other hand, when the wireless reception control device 1 is powered on, the wireless reception control device 1 also supplies power to each antenna device 2 through the power line of the signal line 3, and then the reception frequency setting signal is transmitted. It

Therefore, the time from when the power of the wireless reception control device 1 is turned on to when the reception frequency setting signal is transmitted is sufficient for the internal circuits of the wireless reception control device 1 and the antenna device 2 to be stable. To be done. Normal,
When the power is turned on for the first time, the reception frequency is not set in the antenna device 2. Therefore, the reception frequency can be set in the antenna device 2 by transmitting the reception frequency setting signal immediately after the power is turned on.

Further, when the information of the reception frequency already set in the antenna device 2 is configured to be lost when the power is cut off, the reception frequency setting signal is sent every time the power is turned on. Therefore, the antenna device 2 is always
The reception frequency can be set in advance. Next, even when the wireless reception control device 1 is reset, the reception frequency setting signal is sent from the wireless reception control device 1 to the antenna device 2 (501). The reset is an operation of initializing the wireless reception control device 1, and for example, a malfunction occurs in the wireless reception control device 1,
Perform when the setting operation is incorrect.

Therefore, by automatically transmitting the reception frequency setting signal after resetting and resetting the antenna device 2, the wireless reception system can be operated normally. After performing the signal transmission after power-on (500) or the signal transmission after reset (501), the signal processing unit 11 of the wireless reception control device 1 checks whether the frequency has been changed by the frequency input unit 17 ( 502).
As a result, when the reception frequency is changed, the reception frequency setting signal is sent from the wireless reception control device 1 to the antenna device 2 (503). While the power is turned on, the same inspection (502) is repeated, and the reception frequency setting signal is transmitted every time the setting of the reception frequency is changed (503).

Therefore, when the reception frequency is reset and changed, a new reception frequency can be automatically reset in the antenna device 2, and therefore even when the reception frequency is reset. The frequency set by the frequency input unit 17 of the wireless reception control device 1 and the reception frequency set in the antenna device 2 can be matched.

Next, the wireless receiving system according to the present invention as defined in claims 7 and 8 will be described below.
Reference numerals 600 to 605 in FIG. 6 are flowcharts showing an example of basic operations of the wireless reception control device 1 according to the present invention. Reference numerals 600 to 603 in FIG.
Is the same as 500 to 503 in the above, and 604 and 605 are newly added.

Signal processing unit 1 of wireless reception control apparatus 1
1 monitors the setting request signal from the antenna device 2 (604). This setting request signal is sent when the antenna device 2 requests the wireless reception control device 1 to send a reception frequency setting signal. The setting request signal is generated by the signal processing unit 21 of the antenna device 2 and is output by the external interface unit. It is sent from the signal line 26 to the signal line 3.

When this setting request signal is received by the external interface section 16 of the wireless reception control device 1 and input to the signal processing section 11, the signal processing section 11 generates a reception frequency setting signal and the external interface section 16 is generated.
Transmits to the antenna device 2 (605). In this way, the reception frequency setting signal is transmitted from the wireless reception control device 1 in response to the request from the antenna device 2, so that the frequency can be reset even if a malfunction occurs in the antenna device 2, for example. You can

Reference numerals 700 to 701 in FIG. 7 denote the antenna device 2.
3 is a flowchart showing an example of the basic operation of FIG. In the antenna device 2, when the antenna device 2 is reset, a setting request signal is sent from the antenna device 2 to the wireless reception control device 1 (700). What is reset?
This is an operation for initializing the antenna device, and is performed, for example, when a malfunction occurs in the antenna device 2.

After transmitting the setting request signal, the signal processing section 21 of the antenna device 2 checks whether or not the reception frequency setting signal is transmitted from the wireless reception control device 1 (701). As a result, if the reception frequency setting signal is not transmitted, the setting request signal is continuously transmitted (700). On the other hand, when the reception frequency setting signal can be received, the transmission of the setting request signal is stopped and the reception frequency is set based on the reception signal.

When the antenna device 2 is reset, it is necessary to reset the reception frequency, but the wireless reception control device 1 cannot detect that the antenna device 2 has been reset, and the reception frequency setting signal is set. It cannot be output. Therefore, after resetting the antenna device 2,
By transmitting a setting request signal from the antenna device 2 to the wireless reception control device 1 and the wireless reception control device 1 having received the setting request signal, the reception frequency setting signal is transmitted, so that the reception frequency is automatically changed after the antenna device 2 is reset. Can be reset.

The wireless receiving system according to the present invention as defined in claims 9 and 10 will be described below. This wireless reception system is provided with a reception antenna for a wireless reception control device to receive communication control data including a frequency channel code transmitted from a wireless transmission device, and in a registration mode for registering a reception frequency, The reception frequency varying unit 13 of the wireless reception control device 1 shown in 2 is configured as a unit that sequentially switches a plurality of carrier signals having different frequencies and outputs the carrier signals to the wireless signal receiving unit 12.

In the registration mode, the wireless transmission device sequentially switches a plurality of predetermined frequency channels to modulate and transmit communication control data, while the reception frequency varying unit 13 of the wireless reception control device 1 is predetermined. The plurality of frequency channels are sequentially switched, and the wireless signal receiving unit 12 demodulates the communication control data received by the receiving antenna 10 based on the carrier signal from the receiving frequency changing unit 13.

Signal processing unit 1 of wireless reception control apparatus 1
1 extracts the ID code and the frequency channel code from the communication control data demodulated by the wireless signal receiving section 12 and stores them in the memory section 14. The frequency channel code indicates the frequency of the carrier signal used by the wireless transmission device to modulate communication data in the normal mode (during communication other than the registration mode).

In this way, when the frequency channel used by the wireless transmitter is obtained in the normal mode, the signal processing unit 11 generates the reception frequency setting signal based on the frequency channel code registered in the memory unit 14. Then, the signal is transmitted to the extension antenna device 2 via the external interface unit 16 and the reception frequency of the extension antenna device 2 is set.

That is, since this wireless reception system can set the reception frequency of the additional antenna device 2 based on the communication control data from the wireless transmission device, the wireless reception control device 1 shown in FIG. It is not necessary to provide the frequency input unit 17, and the setting work becomes easy. Furthermore, it is possible to prevent the occurrence of setting mistakes. For example, before the construction of the wireless reception system, communication control data is transmitted from all the wireless transmission devices to the wireless reception control device 1, and the frequency channel used by each wireless transmission device is set to the wireless reception control device 1.
Stored in the memory unit 14 of FIG. After the construction of the wireless reception system, the wireless reception control device 1 sends a reception frequency setting signal to each antenna device 2 to set the frequency channel stored in the memory unit 14 to each antenna device 2. Then, the operation of inputting the reception frequency by operating the switching means becomes unnecessary.

A wireless reception system according to the present invention as defined in claim 11 will be described below. This wireless reception system is configured as a multi-scan type reception system, and in the normal mode,
Each antenna device 2 scans a plurality of set frequencies and receives a wireless signal from the wireless transmission device.

That is, a plurality of frequency channels are set in each antenna device 2 in the registration mode, and in the normal mode, the reception frequency varying unit 23 of each antenna device 2 shown in FIG. The frequency channels are sequentially switched to generate a carrier signal, and the wireless signal receiver 22 demodulates the wireless signal received by this carrier signal.

In the case where the wireless reception control device 1 is configured to include the receiving antenna 10, similarly,
Even when the wireless reception control device 1 performs a reception operation in the normal mode, it operates as a multi-scan type. The plurality of frequency channels set in each antenna device 2 are the wireless reception control device 1 as in the above-described embodiment.
The reception frequency setting signal is transmitted from the antenna device 2 to the antenna device 2. For example, a method in which the reception frequency setting signal transmitted from the wireless reception control device 1 to the antenna device includes a plurality of frequency channel information,
Similar to that shown in FIG. 4, a reception frequency setting signal configured to include only a single frequency channel information,
There is a method in which a plurality of signals having different frequency channel information included in the signal are sequentially transmitted from the wireless reception control device 1 to the antenna device 2.

Regarding the method of setting the plurality of frequency channels, the frequency input section 17 provided in the wireless reception control device 1 may be used for input setting, or the communication control data sent from the wireless transmission device may be set. It is also possible to have a configuration set by.

[0061]

According to the first aspect of the present invention, there is provided a wireless reception system in which an antenna device and a wireless reception control device are connected by a signal line, and the antenna device is connected to the wireless reception control device via the signal line. The reception frequency setting signal is received, and the frequency of the wireless signal to be received is selected and set based on the reception frequency setting signal.

Therefore, the receiving frequency can be selectively set without providing the antenna device with the frequency setting means.
The cost of each antenna device can be reduced. Further, it is not necessary to set the reception frequency for each antenna device, and if the setting work is performed only in the wireless reception control device, the setting of all the connected antenna devices is completed, and the work time is shortened. can do. In particular, when a large number of antenna devices are installed or when they are installed over a wide range, the work time can be significantly shortened.

In the wireless receiving system according to the second aspect of the present invention, the reception frequency setting signal sent from the wireless reception control device to the antenna device is a system code indicating the type of the communication system to which the signal is applied, and the frequency to be used. And a channel code indicating a channel. If the correspondence relationship between the system code and the channel code and the frequency is predetermined, the antenna device receiving this reception frequency setting signal can extract the system code and the channel code from the reception signal and specify the reception frequency. . Therefore, the data amount of the transmission signal can be reduced, and the frequency other than the predetermined frequency will not be erroneously set.

In the wireless receiving system according to the third aspect of the present invention, the receiving frequency setting signal is sent from the wireless reception control device to the antenna device every predetermined time, and the receiving frequency of the antenna device is set periodically.
Therefore, the frequency of the wireless signal to be received by the antenna device can always be matched with the frequency set in the wireless reception control device, and it is possible to prevent a mismatch between the two.

In the wireless reception system according to the present invention described in claim 4, after the wireless reception control device is powered on, a reception frequency setting signal is sent from the wireless reception control device to the antenna device to set the reception frequency in the antenna device. . Normally, when the power is turned on for the first time, the reception frequency is not set in the antenna device. In some cases, the information on the reception frequency already set in the antenna device may be lost due to the interruption of the power supply. In such a case, the reception frequency can be always set in the antenna device by transmitting the reception frequency setting signal every time the power is turned on.

In the wireless receiving system according to the fifth aspect of the present invention, after the wireless reception control device is reset, a reception frequency setting signal is sent from the wireless reception control device to the antenna device to set the reception frequency in the antenna device. Therefore, by automatically transmitting the reception frequency setting signal after resetting the wireless reception control device and resetting the antenna device, the wireless reception system can be operated normally even after the reset.

In the wireless reception system according to the present invention as set forth in claim 6, a reception frequency setting signal is sent from the wireless reception control device to the antenna device and received by the antenna device each time the reception frequency is changed in the wireless reception control device. Set the frequency. Therefore, when the reception frequency is reset, a new reception frequency can be automatically reset in the antenna device. Therefore, even if the reception frequency is changed, it is set in the wireless reception control device. The frequency and the reception frequency set in the antenna device can always be matched.

In the wireless receiving system according to the present invention as set forth in claim 7, a setting request signal is sent from the antenna device to the wireless reception control device, and the wireless reception control device sends the receiving frequency setting signal based on the setting request signal. Send out. That is, when the reception frequency setting signal is not transmitted from the wireless reception control device and the reception frequency of the antenna device is desired to be reset, the wireless reception control device is requested to transmit the reception frequency setting signal. Therefore, the antenna device can actively reset the reception frequency.

Therefore, even if a malfunction or the like occurs in a certain antenna device and the wireless reception control device cannot detect this, the frequency of the antenna device can be reset. In the wireless receiving system according to the present invention described in claim 8, the setting request signal is output from the antenna device to the wireless reception control device after the antenna device is reset.

Therefore, after the antenna device is reset, the reception frequency setting signal is automatically sent from the wireless reception control device to reset the reception frequency of the antenna device so that the wireless reception system operates normally even after the reset. You can In the wireless communication system according to the present invention as set forth in claims 9 and 10, the wireless reception system, when in the registration mode, the wireless reception control device receives a modulated wave of communication control data transmitted from the wireless transmission device, The frequency channel information is extracted from the communication control data, registered in the communication information memory, and the reception frequency setting signal is sent to the antenna device.

Therefore, the setting operation at the time of setting the frequency channel used by the wireless transmission device in the antenna device is simplified, the occurrence of setting error can be prevented, and the setting work at the time of system construction is greatly reduced. To be done. In the wireless communication system according to the present invention as set forth in claim 11, in the wireless reception system, a frequency channel is set to each antenna device by a reception frequency setting signal transmitted from the wireless reception control device, and each antenna device is The frequency channels of are sequentially switched to receive and demodulate.

Therefore, the wireless reception control device can set the wireless reception system for setting the reception frequency of the antenna device as a multi-scan type wireless reception system.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a system configuration of a wireless reception system according to the present invention described in claim 1;

FIG. 2 is a diagram illustrating a configuration example of the wireless reception control device shown in FIG.

3 is a diagram illustrating a configuration example of the antenna device illustrated in FIG.

FIG. 4 is a diagram showing a configuration example of a reception frequency setting signal of the wireless reception system according to the present invention as defined in claim 2;

FIG. 5 is a flowchart showing an example of a basic operation of the wireless reception control device according to the present invention described in claims 4 to 6.

FIG. 6 is a flowchart showing an example of a basic operation of the wireless reception control device according to the present invention described in claims 7 and 8.

FIG. 7 is a flow chart showing an example of a basic operation of the antenna device according to the present invention as set forth in claims 7 and 8.

[Explanation of symbols]

 1 ... Wireless reception control device 11, 16 ... Setting signal output means 12 ... Wireless signal receiving means 14 ... Storage unit 2 ... Antenna device 20 ... Reception antenna 21 ... Reception Frequency setting means 22 ... Wireless signal receiving means 21, 26 ... Request signal outputting means 3 ... Signal line 410 ... System code 411 ... Channel code

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideaki Okada 1048, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. (72) Seiji Murao, 1048, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd.

Claims (11)

[Claims] 1. A wireless reception system configured by connecting an antenna device to a wireless reception control device by a signal line, and transmitting received data received by a reception antenna of the antenna device to the wireless reception control device via the signal line. In the above, the wireless reception control device is provided with setting signal output means for sending a reception frequency setting signal to the antenna device via a signal line, and the antenna device has a specific frequency selected from a plurality of frequencies. A wireless signal receiving means for receiving a wireless signal; and a receiving frequency setting means for selectively setting the frequency of the wireless signal receiving means based on the receiving frequency setting signal from the wireless reception control device. And wireless reception system. 2. The wireless reception system according to claim 1, wherein the reception frequency setting signal includes a system code indicating a type of communication system to be applied and a channel code indicating a frequency channel to be used. A wireless receiving system characterized by the following. 3. The wireless reception system according to claim 1, wherein the setting signal output means of the wireless reception control device is configured as means for sending a reception frequency setting signal to the antenna device at predetermined time intervals. A wireless receiving system characterized in that the frequency of a wireless signal to be received by an antenna device is set periodically. 4. The wireless reception system according to claim 1, wherein the setting signal output means of the wireless reception control device sends a reception frequency setting signal to the antenna device after the wireless reception control device is powered on. A wireless reception system, characterized in that the frequency of a wireless signal to be received by the antenna device is set after the power of the wireless reception control device is turned on. 5. The wireless reception system according to claim 1, wherein the setting signal output means of the wireless reception control device sends a reception frequency setting signal to the antenna device after the wireless reception control device is reset. A wireless reception system configured as a means for setting a frequency of a wireless signal to be received by an antenna device after resetting of a wireless reception control device. 6. The wireless reception system according to claim 1, wherein the setting signal output means of the wireless reception control device sets the reception frequency to the antenna device each time the reception frequency is changed in the wireless reception control device. A wireless reception system configured as means for transmitting a signal, wherein the frequency of the wireless signal to be received by the antenna device is set every time the reception frequency is changed in the wireless reception control device. 7. The wireless receiving system according to claim 1, wherein the antenna device includes request signal output means for sending a setting request signal requesting a reception frequency setting signal to the wireless reception control device, A wireless reception system, wherein the setting signal output means of the wireless reception control device sends a reception frequency setting signal based on the setting request signal from the antenna device. 8. The wireless reception system according to claim 7, wherein the request signal output means of the antenna device is configured to send a reception frequency setting signal to the wireless reception control device after the antenna device is reset. A wireless receiving system, wherein the frequency of a wireless signal to be received by the antenna device is set after the reset of the antenna device. 9. The wireless reception system according to claim 1, wherein the wireless reception control device is for reception for receiving communication control data including a frequency channel code transmitted from a wireless transmission device. An antenna is provided, which is configured as a unit that sequentially demodulates and demodulates a plurality of predetermined frequency channels, and receives the communication control data, based on channel information included in the communication control data, via a signal line, A wireless reception system, wherein a reception frequency setting signal is transmitted from a wireless reception control device to an antenna device. 10. The wireless communication system according to claim 9, wherein the wireless reception control device includes a reception antenna for receiving communication control data including an ID code and a frequency channel code transmitted from the wireless transmission device. , A receiving frequency varying means for sequentially switching a carrier signal to a plurality of preset frequency channels, a wireless signal receiving means for demodulating a received signal into communication control data by a carrier signal from the receiving frequency varying means, and a wireless signal receiving means Storage means for registering the ID code and the channel code demodulated by the means, and a reception frequency setting signal to the antenna device via the signal line based on the channel code registered in the storage means. Having a setting signal output means for sending out Wireless communication system according to claim. 11. The wireless reception system according to claim 1, wherein the wireless reception control device is configured as means for setting a plurality of frequency channels for an antenna device by the frequency setting signal. A wireless receiving system, wherein the antenna device is configured as a multi-scan type antenna device that sequentially switches a plurality of set frequency channels to demodulate and receives a wireless signal.