JPH08102721A - Wireless communication system - Google Patents

Abstract

PURPOSE: To simply confirm whether the radio communication is possible or not for installation of a new radio equipment by deteriorating the reception sensitivity compared with its normal state just for a prescribed time by a timer control circuit and via an attenuator for confirmation of the reception state in a communication confirmation test mode. CONSTITUTION: When a communication equipment and a receiver 1 are newly installed, a communication confirmation test is first required. In this instance, a switch 15 is kept at the side of a terminal 12 for a prescribed time by a timer control circuit 13. Thus the received radio wave flows to an attenuator 11, and the attenuator 11 attenuates the received radio wave and sends this attenuated radio wave to a reception part 17. An LED 23 is turned on when the radio wave is stably received at the part 17. The circuit 13 switches the switch 15 to the side of a terminal 10 to reset a normal state after a prescribed time and then sends the received radio wave to the part 17 with no intervention of the attenuator 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication system for confirming communication at the time of installation.

[0002]

2. Description of the Related Art Recently, when a transmitter is attached to an indoor gas detector or the like, and a receiver is attached to an outdoor gas microcomputer or the like, and a gas leak or the like is detected by the gas detector or the like, the gas microcomputer or the like is wirelessly connected to the gas microcomputer meter. A system has been developed that is known to generate gas leakage and shuts off gas.

By the way, when a transmitter and a receiver are installed, it is necessary to check whether or not radio waves can be sufficiently received at the installation place. For this reason, the electric field strength at the place where it is to be installed is measured by an electric field strength measuring instrument or the like to make a judgment.

[0004]

However, when measuring and judging with an electric field strength measuring instrument or the like, it is difficult to make the place where the radio device is installed and the measuring place with the electric field strength measuring instrument exactly the same, and There is a problem that it is difficult to make the environment around the installation place exactly the same, and accurate determination cannot be performed.

The present invention has been made in view of the above problems, and an object of the present invention is to make it possible to easily confirm whether or not wireless communication can be performed when a wireless device is newly installed. To provide a system.

[0006]

In order to achieve the above-mentioned object, a first invention is a wireless communication system comprising a transmitter and a receiver, wherein the receiver has a receiving unit for receiving radio waves and a predetermined unit. Attenuating means for attenuating radio waves input to the receiving section for a period of time, and when the transmitter and the receiver are newly installed, a communication test is performed with the attenuating means operating. It is a wireless communication system.

A second aspect of the present invention is a wireless communication system comprising a transmitter and a receiver, wherein the transmitter transmits a radio wave and attenuates the radio wave output from the transmitter for a predetermined time. Means for performing a communication test in a state where the attenuating means is activated when the transmitter and the receiver are newly installed.

[0008]

According to the present invention, when a wireless device is newly installed, the radio waves of transmission or reception are attenuated for a predetermined time to confirm communication.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram of a wireless communication device according to an embodiment of the present invention. As shown in FIG. 1, the receiver 1
A terminal 5 is connected to the transmitter 3, a detector 7 is connected to the transmitter 3, and wireless communication is performed between the receiver 1 and the transmitter 3. Terminal 5
Is, for example, a gas microcomputer meter, and the detector 7 is, for example, a gas detector.

FIG. 2 is a block diagram showing the configuration of the receiver 1. The receiver 1 is provided with an antenna 9, and the antenna 9 is connected to the terminal 10. An attenuator 11 is connected to the terminal 10, and the terminal 1 is connected to the output side of the attenuator 11.
Two are provided. The attenuator 11 attenuates the received radio wave. The switch 15 is switched by the timer control circuit 13. When performing the communication confirmation test, the timer control circuit 13 switches the switch 15 to the terminal 12 side for a predetermined time, and after the predetermined time elapses, the timer control circuit 13 switches the switch 15 to the terminal 10 side. That is, the timer control circuit 13 controls the switch 15 to switch whether the radio wave received from the antenna 9 is passed through the attenuator 11 or directly sent to the receiving unit 17. The receiving unit 17 includes a reception demodulation circuit 25, a message information analysis circuit 27, and a terminal control circuit 29, and the receiving unit 17 is supplied with power from a power supply circuit 19. Further, the LED 23 is connected to the receiving unit 17 via the LED control circuit 21. The reception demodulation circuit 25 demodulates the reception signal. The electronic message information analysis circuit 27 analyzes the received electronic message. The terminal control circuit 29 sends the analyzed received message to the terminal 5. When the receiving unit 17 can stably receive the electronic message, the LED 23 lights up.

Next, a series of operations of transmission and reception in normal time will be described. For example, when the detector 7, which is a gas detector, detects a gas leak, the transmitter 3 transmits the detected information. The radio wave transmitted from the transmitter 3 is transmitted to the antenna 9
It is received by the receiver 1 via. The signal received by the receiver 1 is demodulated by the reception demodulation circuit 25, analyzed by the electronic statement information analysis circuit 27, and then the terminal 5 by the terminal control circuit 29.
The information is transmitted to and the gas is shut off at the terminal 5.

By the way, when the transmitter 3 and the receiver 1 are newly installed, it is necessary to first perform a communication confirmation test. In this case, the timer control circuit 13 causes the switch 1 to operate.
5 is switched to the terminal 12 side for a predetermined time, and the received radio wave flows to the attenuator 11. The attenuator 11 attenuates the received radio wave, and the attenuated received radio wave is sent to the receiving unit 17. When the receiving unit 17 can perform stable reception, the LED 23 lights up. After a lapse of a predetermined time, the timer control circuit 13 switches the switch 15 to the terminal 10 side to return it to the normal time, and the received radio wave is sent to the receiving unit 17 without passing through the attenuator 11.

As described above, according to this embodiment, when the receiver 1 and the transmitter 3 are newly installed, the communication confirmation can be performed with the receiver 1 and the transmitter 3 installed, so that the measurement is performed by the electric field strength measurement. As compared with the case, there is no error, and highly reliable confirmation can be performed. That is, only during the communication confirmation test, the received radio wave is attenuated and it is confirmed that the signal can be received even in a situation where the reception sensitivity is poor, so that the communication confirmation test can be performed while making the communication in the normal state more reliable.

In the above-mentioned embodiment, an example in which the radio wave is attenuated on the receiving side at the time of the communication confirmation test is explained.
The transmission side may attenuate the radio waves.

FIG. 3 is a block diagram showing the structure of the transmitter 3 in this case. The transmitter 3 is provided with an antenna 31, the antenna 31 is connected to a terminal 32, the terminal 32 is connected to an attenuator 33, and the output side of the attenuator 33 is provided with a terminal 34. The switch 37 is switched by the timer control circuit 35. When performing the communication confirmation test, the timer control circuit 35 switches the switch 37 to the terminal 34 side for a predetermined time, and after the predetermined time elapses, the timer control circuit 35 switches the switch 37 to the terminal 32 side.
That is, the timer control circuit 35 controls the switch 37 to switch whether the radio wave transmitted from the transmission unit 39 is passed through the attenuator 33 or directly sent to the antenna 31.
Electric power is supplied to the transmission unit 39 from the power supply circuit 41. The transmission unit 39 includes a signal detection circuit 43, a message information setting circuit 45, and a modulation transmission circuit 49.

During the communication confirmation test, the timer control circuit 35
Switches the switch 37 for a predetermined time so that the transmission radio wave passes through the attenuator 33, the transmission radio wave is attenuated by the attenuator 33, and is transmitted from the antenna 33. After a lapse of a predetermined time, the switch 37 is returned to the original state, and the transmission radio wave is transmitted from the antenna 31 without passing through the attenuator 33. Then, it is confirmed whether or not the receiver 1 can stably receive the radio wave.

[0017]

As described above in detail, according to the present invention, when a wireless device is newly installed, it is possible to easily confirm whether or not wireless communication can be performed.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a wireless communication system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a receiving side device.

FIG. 3 is a block diagram showing a configuration of a transmission side device.

[Explanation of symbols]

 1 ... Receiver 3 ... Transmitter 5 ... Terminal 7 ... Detector 9, 31, ... Antenna 10, 12, 32, 34 ... Terminal 11, 33 ... Attenuator 13, 35 ......... Timer control circuit 15, 37 ......... Switch 21 ......... LED control circuit 23 ......... LED

Claims (3)

[Claims] 1. A wireless communication system comprising a transmitter and a receiver, wherein the receiver comprises a receiver for receiving radio waves, and an attenuator for attenuating the radio waves input to the receiver for a predetermined time. Then, when the transmitter and the receiver are newly installed, a communication test is performed in a state in which the attenuator is activated. 2. A wireless communication system comprising a transmitter and a receiver, wherein the transmitter comprises a transmitter for transmitting radio waves, and an attenuator for attenuating the radio waves output from the transmitter for a predetermined time. Then, when the transmitter and the receiver are newly installed, a communication test is performed in a state in which the attenuator is activated. 3. The radio communication system according to claim 1, wherein the attenuator operates the attenuator for a predetermined time.