JPH05145970A - Home control system - Google Patents

Abstract

PURPOSE:To suppress system down caused by fault transmission by turning off the driving power source of a transmitting terminal after the lapse of a prescribed time when the transmitting terminal executes the fault transmission. CONSTITUTION:A monitor part 36 monitors the presence/absence of a transmitting signal to be transmitted to an antenna 34, a detecting signal S at an H level is sent to a timer part 35 while the transmitting signal is continued, time is counted, and the timer is reset from an L level 12 within a prescribed time. When the detecting signal S is still maintained at the H level even after the lapse of the prescribed time, a power supply switch 37 is turned off, and the operation of a transmission part 33 is stopped. Thus, even when one of the wireless transmitters executes the fault transmission, the transmitting signals from the other equipments can be received by a room adapter, and system down can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a home control system provided with a plurality of wireless transmission terminals and a room adapter having a receiving section for receiving signals transmitted by these wireless transmission terminals.

[0002]

2. Description of the Related Art FIGS. 2 and 3 show a conventional example of a home control device. In both figures, 1 is a home bus and 2 is a controller. 10 is a room adapter installed on the ceiling of the room, 10A is a receiver of the room adapter, 11 is a lighting fixture, 21 is a remote controller, 22 is a security sensor, 23 is a fire sensor, 2
Reference numeral 4 is a gas leak sensor, 25 is an alarm lamp such as a display lamp and an alarm sound generator in a synthetic language, and 26 is an air conditioner.

In the configuration of FIG. 3, the control signal (infrared signal or radio wave) transmitted by the remote controller 21 is received by the receiver 10A of the adapter 10. The adapter 10 decodes the received control signal, and if the control signal includes a command to turn on the lighting fixture 21, for example, controls the lighting of the lighting fixture 21 and includes a command to operate the air conditioning equipment 26. If so, the air conditioning equipment 26 is ON-controlled. Further, the security sensor 22 has a wireless transmitter 22A whose block configuration is shown in FIG. 4, and when the sensor body detects that a person has entered the room, the wireless transmitter 22A outputs a security signal (infrared signal or radio wave). The adapter 10 that has transmitted and received this security signal drives the alarm devices 25. The fire sensor 23 and the gas leak sensor 24 also have wireless transmitters 23A and 24A, respectively, and when a fire occurrence or a gas leak is detected, a security signal (infrared signal or radio wave) is transmitted.

[0004]

In the conventional system of this type, a plurality of wireless transmitters 22A, 23A,
Since the transmission frequencies of 24A are all the same and are continuously transmitted, if one wireless transmitter fails and remains in the transmitting state, even if another wireless transmitter transmits. On the room adapter 10 side, signals cannot be received from other wireless transmitters, and the system goes down.

For example, when the wireless transmitter 22A of the security sensor 22 transmits a failure and remains in the transmitting state,
A wireless transmitter 23 of the fire sensor 23 when a fire occurs
Even if A sends a security signal (fire detection signal),
This security signal is not received, and it may be too late to deal with the fire that has occurred.

The present invention has been made in order to solve this problem, and an object of the present invention is to provide a highly reliable home control system capable of preventing system down caused by failure transmission of a transmitting terminal. To do.

[0007]

In order to achieve the above object, the present invention provides a room adapter having a plurality of wireless transmission terminals and a receiving section for receiving signals transmitted by these wireless transmission terminals. In the home control device, the wireless transmission terminal forcibly turns on the power switch when the “present” period of the signal continues for more than a predetermined time and a monitoring unit that monitors the presence or absence of a signal sent to the transmission antenna. It is configured to have a timer unit for opening the circuit.

In the second aspect, the predetermined time is a time large enough to distinguish the fault transmission of the transmitting terminal from the normal transmission.

[0009]

According to the present invention, when the transmitting terminal fails and transmits, the driving power source of the transmitting terminal is forcibly turned off after a certain period of time, and the transmitting terminal becomes incapable of transmitting.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 30 denotes a wireless transmitter provided in a security sensor such as the crime prevention sensor 22, the fire sensor 23, the gas leak sensor 24, etc., which is a signal of a predetermined format carrying security information output from the sensor body. , A transmission unit 33 and a timer unit 35 which modulate this signal and send it to an antenna 34.
The monitoring unit 36 and the power switch 37 are provided. Reference numeral 38 is a drive power source for the wireless transmitter 30. The power switch 37 turns on / off the electric power supplied from the driving power source 38 to the transmitting unit 33.

The monitoring unit 36 monitors the presence or absence of a transmission signal to be sent to the antenna 34, and sends the H-level detection signal S to the timer unit 35 while the transmission signal continues. The timer unit 35 starts timing in synchronization with the rising of the detection signal S, and resets if the detection signal S falls to the “L” level before the preset time T elapses, but it is set in advance. If the detection signal S remains at the “H” level even after the lapse of the time T _K , the power switch 37 is turned off, which disables the transmitter 33 and stops the transmission of the transmission signal. The time T _K is a multiple of the transmission cycle of the wireless transmitter 30, and is sufficient to distinguish a fault transmission from a normal transmission.

Therefore, even if one of the wireless transmitters makes a failure transmission, it becomes impossible to make a transmission after the time T _K elapses. Therefore, the signal transmitted by another device is disturbed by the room adapter 10 by the failure transmission. The situation of not being received is unlikely to occur.

[0014]

As described above, according to the present invention, when a transmitting terminal makes a failure transmission, the drive power of the transmitting terminal is forcibly turned off after a certain time elapses. It is less likely to occur and the reliability can be improved as compared with the conventional one.

[Brief description of drawings]

FIG. 1 is a block diagram showing a transmitting terminal according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a conventional home control system.

FIG. 3 is a block diagram showing another conventional home control system.

FIG. 4 is a block diagram showing a transmitting terminal in the conventional example.

[Explanation of symbols]

 1 Home Bus 2 Controller 10 Room Adapter 10A Receiver 21 Remote Controller 21-24 Security Sensor 30 Wireless Transmitter 31 Input Unit 32 Control Unit 33 Transmitter 34 Antenna 35 Timer Unit 36 Monitoring Unit 37 Power Switch 38 Driving Power Supply

Claims (2)

[Claims] 1. A home control system comprising a plurality of wireless transmission terminals and a room adapter having a receiving unit for receiving signals transmitted by these wireless transmission terminals, wherein the wireless transmission terminals are signals sent to a transmission antenna. A home control system comprising: a monitoring unit for monitoring the presence / absence of a signal, and a timer unit for forcibly opening the power switch when the “present” period of the signal continues beyond a predetermined time. 2. The home control system according to claim 1, wherein the predetermined time is a time large enough to distinguish a failure transmission of a transmission terminal from a normal transmission.