JPS62110334A - Radio transmission and reception equipment - Google Patents

Abstract

PURPOSE:To ensure the transmission of information by changing an optional carrier into another carrier possible for transmission/reception automatically when the transmission/reception is disabled in the former carrier frequency so as to eliminate the collision of carrier frequencies. CONSTITUTION:The constitution is adopted that a house cord switch is omitted, a means 2 changing the carrier frequency is added and the carrier frequency is changed based on a signal of a control means 3. When an indicator 14 of a main controller transmitter/receiver 1 is operated regardless of the operation of the transmitter/receiver of each terminal equipment in a house, a command means 13 is energized, then the control means 3 energizes the change means 2 to change over all the carrier frequency of the transmitter/receiver of the house automatically and transmission/reception is attained by the new carrier frequency.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to the configuration of terminal equipment in the field of home automation.

2. Description of the Related Art A conventional wireless transmitter/receiver system of this type has a configuration shown in FIG.

Each house 16.16' has one main controller transceiver 1.1' installed in each house, and information (
Terminal transceiver for reporting (e.g. gas leak signal, etc.) 17.
It is composed of 1τ, 18.18', and 19.19'.

FIG. 2 is a schematic configuration diagram of 18 conventional main controller transmitters and receivers. In the case of a transmitter, transmission data is sent from a control means 3 to a transmission circuit 4, synthesized and modulated by an oscillation circuit 5 that oscillates at a specific carrier frequency, and radiated into space from an antenna 7 through an amplifier circuit 6. On the other hand, in the case of a receiver, the radio waves input from the antenna 7 are amplified by the RF amplification circuit 8,
The signal is detected by a tuning circuit 9 and a receiving circuit 10, which are tuned to a specific carrier frequency determined in the house, and the signal is demodulated, input to the control means 3, and decoded. Note that 12 is a transmission/reception changeover switch, and 15 is a house code switch for distinguishing each house. 14 is an indicator that warns the contents of each terminal transceiver. Therefore, each house's main controller transceiver 1 and each terminal transceiver 17.18
．． The 19 house codes must be the same.

Problems to be Solved by the Invention However, in the above configuration, radio waves propagate everywhere in free space, and the carrier frequency is common to each house, making it difficult to differentiate the system of one house. What is different is the house code switch. When this system is used in an apartment complex or a farmland, if the house code is the same for one house and another house, the information on the transmitter/receiver of one house can be used to switch the house code for a separate house. There is a problem in that the main controller transmitter/receiver malfunctions, causing an alarm to sound. In addition, changing the operation of the house code switch is cumbersome and cannot be incorporated into future home automation. .

The present invention solves such conventional problems, and aims to provide a wireless transmitter/receiver that is less likely to malfunction even in an apartment complex and eliminates the trouble of changing the operation of a house code switch.

Means for Solving the Problems In order to solve the above problems, a wireless transmitter/receiver according to the present invention includes: a transmitter and a receiver that transmit and receive a plurality of carrier frequency signals; a changing means that changes the carrier frequency; It has a control means for energizing the changing means and a command means for switching the carrier frequency, and when it is impossible to transmit and receive at any one carrier frequency, it automatically changes to a carrier frequency that allows transmission and reception and performs transmission and reception. It is structured as follows.

Effects of the present invention With the above-described configuration, carrier frequency collisions are eliminated and information is reliably transmitted.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

FIG. 1 is a schematic configuration diagram of a main controller transceiver 1. What differs from the conventional example is that the house code switch 15 is omitted and a changing means 2 for changing the carrier frequency is added, and the carrier frequency is changed based on the signal from the control means 3. This is a configuration that changes the .

The carrier frequency can be changed by adding varicaps to the oscillation circuit 5 and tuning circuit 9 and changing the resonant frequency by changing the capacitance when voltage is applied, or by changing the division ratio like in a frequency synthesizer. can.

In the above configuration, if the indicator 14 of the main controller transmitter/receiver Mg1 operates even though the transmitter/receiver of each terminal device is not operating in a certain house, the carrier frequency of the terminal transmitter/receiver of the neighboring house and the transmitter/receiver of the neighboring house It is no good if the carrier frequencies of both are the same. However, in this case, the command means 13
By energizing, the control means 3 energizes the changing means 2 to automatically switch the carrier frequency of all transmitters and receivers in that house, and from now on transmit and receive on the new carrier frequency, thereby preventing future interference with neighboring houses. This has the effect of eliminating malfunctions due to

Effects of the Invention As described above, the wireless transmitter/receiver of the present invention provides the following effects.

(1) Even if wireless transmitting/receiving devices are used all at once in an apartment building or the like, since the carrier frequency of the neighboring house is always different, signal transmission can be performed reliably without interference.

+2) The system can be configured by operating the command means, eliminating the need to distinguish between neighboring houses by operating the house code switch, and eliminating the need for the user to set data.

(3) On the manufacturer side, since a system without interference is automatically configured in the user's area, system management becomes easier.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a main controller transceiver according to an embodiment of the present invention, FIG. 2 is a system diagram of a wireless transmitter/receiver, and FIG. 3 is a schematic diagram of a conventional main controller transceiver. be. 1... Main controller transmitter/receiver, 2...
... Changing means, 3... Control means, 13...
...Command means, 17.17', 1B, 18', 19.
19'...Terminal transceiver.

Claims (1)

[Claims] comprising a transmitter and a receiver for transmitting and receiving a plurality of carrier frequency signals, a changing means for changing the carrier frequency, a control means for energizing the changing means, and a command means for instructing switching; A wireless transmitting/receiving device that energizes the changing means in response to a signal from the command means to switch the frequency to another carrier frequency for transmitting and receiving when it is impossible to transmit and receive on any one carrier frequency.