KR100264844B1 - Remote sensor for homesecurity system - Google Patents

Abstract

PURPOSE: A circuit for originating error state information of a remote sensor for a home security system is provided to periodically check whether the remote wireless sensor is normally operated. CONSTITUTION: An encoder(16) responds to a situation detecting signal of a sensor(10) for situation sensing. The encoder(16) controls outputs of data stored in a sensor information memory(17). The encoder(16) inserts bits checking whether the sensor(10) is normally operated into the data, by using pulse outputs having a constant time interval by a timer(18). An oscillator(13) modulates output signals of the encoder(16) into RF(Radio Frequency) signals. A high frequency amplifier(14) amplifies the modulated RF signals and outputs the RF signals through an antenna(15).

Description

Information transmission circuit for abnormal status of remote sensor for home security system

1 is a conventional circuit configuration diagram.

2 is a circuit diagram of the present invention.

* Explanation of symbols for main parts of the drawings

10 sensor 12 signal amplifier

13: oscillator 14: high frequency amplifier

15 antenna 16 encoder

17: sensor information memory 18: timer

The present invention relates to a home security system of a remote wireless sensing method, and more particularly, to an abnormality / information / information transmitting circuit of a home security system remote sensor that enables the main controller to periodically check whether the remote wireless sensor is normally operated.

In order to provide various functions such as anti-theft, gas alarm, and fire alarm to the home security system installed in general homes, various function sensors corresponding to them are required.

As the function of the home security system is diversified, the number of wirings between the corresponding sensor and the main controller increases, which makes the installation work difficult. This problem is solved through the wirelessization of the sensor unit.

The home security system based on the remote wireless sensing method is largely amplified the sensing signal of the sensor for each function and then modulated to RF signal and the sensor unit to which each code is applied and wirelessly receives, and the sensing (RF) signal from the sensor unit. The sensor code is divided into a main control part that recognizes the sensor code of the sensor part and displays the position and state of the sensor to the user.

In such a remote wireless sensing method, it is necessary to check whether the sensor for each function is operating normally.

1 shows a conventional example of the apparatus for confirming normal operation of the sensor according to the above.

As referred to herein, the situation signal detected by the sensor 10 is amplified by the signal amplifier 12 and then carried on the oscillation signal of the oscillator 13 and modulated into an RF signal.

The RF signal transmits the sensing state information and the sensor identification code from the antenna 15 to the main control unit, that is, the receiving unit antenna via the high frequency amplifier 14.

In addition, when the switch 11 is turned on to identify whether the normal operation or not, the antenna 15 transmits a normal operation identification code.

In this case, however, if the user does not operate the switch 11 at regular intervals, the function sensor may be disabled or an accident may occur due to a user's check miss even though an abnormality occurs in the sensor. .

As a way to alleviate the inconvenience of using the remote sensor check circuit of FIG. 1, a technique has been proposed to check whether the corresponding function sensor operates normally by using a microcomputer, but this is expensive for each sensor unit. You have to bear the heavy burden of micom's demands.

SUMMARY OF THE INVENTION An object of the present invention is to provide an abnormality information sending circuit of a remote sensor for a home security system that periodically sends a desired function, that is, self-diagnosis information to a main control portion, at a low price without causing a complicated circuit configuration.

The present invention is characterized in that in the remote sensor unit system that reads the data of the sensor information memory from the encoder according to the situation detection signal of the sensor and modulates the RF to be sent to the main controller, a timer for periodically generating a pulse is connected to the encoder, The pulse bits of the timer are synthesized and output in the same format as the parity code to the data of the sensor information memory, and the main controller receives the main bits to identify whether the sensor unit operates normally.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated based on attached drawing.

2 is a circuit diagram of the present invention, in which the situation signal detected by the sensor 10 is connected to the encoder 16 via the signal amplifier 12. The encoder 16 is connected with a sensor information memory 17 having sensor type and position information of each function, and a timer 18 for generating a pulse at a predetermined time interval. The output signal of the encoder 16 is connected to the oscillation signal of the oscillator 13 so as to be modulated by RF, and the RF modulated signal is transmitted from the antenna 15 to the main control unit via the high frequency amplifier 14. Is configured.

Referring to the operation and effects of the present invention configured as described above are as follows.

In FIG. 2, the situation signal detected by the sensor 10 is amplified by the signal amplifier 12 and then input to the encoder 16 together with the sensor specific code. Accordingly, the encoder 16 sends the sensor specific code to the sensor information memory 17, reads the function, position information, etc. of the sensor recorded in the sensor information memory 17, and outputs the same to the oscillator 13.

The function and position information of the corresponding sensor RF-modulated by the oscillation signal of the oscillator 13 is amplified by the high frequency amplifier 14 and then transmitted to the main control unit through the antenna 15.

On the other hand, in a state in which a situation is not detected in the sensor 10, that is, in a standby state, it is necessary to identify whether the sensor 10 is in a normal operating state, which is provided from the sensor information memory 17 to the encoder 16. By inserting a simple bit into the data, it is possible to arbitrarily select the status sensing information output of the sensor and the information output according to whether the sensor is abnormal.

This bit insertion utilizes the output of a timer 18 designed to generate pulses at regular time intervals. Therefore, the main control unit side can determine whether the abnormal operation state of the sensor 10 by checking the bits included in the signal transmitted from the sensor unit.

As described above, the present invention uses a low-cost encoder element and a timer element instead of a relatively expensive microcomputer to construct a remote transmission sensor unit having a self-diagnosis signal generation function, thereby achieving cost reduction of a home security system. Will be.

Claims (1)

In response to the situation detection sensor 10 and the situation detection signal of the sensor 10, the output of the corresponding data stored in the sensor information memory 17 is controlled, and a pulse output at a predetermined time interval by the timer 18 is detected. An encoder 16 used as a check bit for normal operation abnormality, an oscillator 13 for modulating the output signal of the encoder 16 into an RF signal, and amplifying an RF signal of a sensor modulated by the oscillator 13 And a high frequency amplifier (14) for outputting to the antenna (15).