JPH10255175A - Hot wire sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To transmit information indicating that abnormality is generated even when a power line or a signal line is disconnected or short-circuited by transmitting information indicating that the abnormality is generated by radio by using a battery as a power source for indicating the abnormality of the power line and/or the signal line. SOLUTION: A state detecting part 4 detects the state of a signal line 5, and outputs a signal indicating abnormality when the signal line is disconnected or short-circuited. In the same way, a state detecting part 7 detects the state of a power line 8, and outputs a signal indicating abnormality when the power line is disconnected or short-circuited. A sub-control part 11 is constituted of a CPU and a peripheral circuit, and at the time of receiving the signal indicating the abnormality of the signal line 5 from the state detecting part 4, or at the time of receiving the signal indicating the abnormality of the power line 8 from the state detecting part 7, the sub-control part 11 activates a radio transmitting part 12 to transmit information indicating that the abnormality is generated by radio. In this case, a power supply voltage is supplied from a battery 10 to the sub-control part 11 and the radio transmitting part 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot-wire sensor and, more particularly, to a hot-wire sensor for wirelessly reporting an abnormality when a power line or a signal line has an abnormality.

[0002]

2. Description of the Related Art A hot-wire sensor is operated by a power supply voltage supplied by a power supply line. When detecting a movement of a person, the sensor emits an alarm signal indicating that the person has moved. Output to line.

However, if the power supply line is disconnected or short-circuited for some reason, the power supply voltage is not supplied and the device does not operate, and the signal line is disconnected or short-circuited for some reason. In this case, the alarm signal is not transmitted.

The present invention has been made to solve the above-mentioned problems, and a hot-wire sensor capable of transmitting information indicating that an abnormality has occurred even when a power supply line or a signal line is disconnected or short-circuited. The purpose is to provide.

[0005]

In order to achieve the above-mentioned object, a hot-wire sensor according to the present invention is provided with a power-supply line and outputs an alarm signal through a signal line. Power line state detecting means for detecting the state of the signal line, a signal line state detecting means for detecting the state of the signal line, a battery, and a wireless transmission means, when the output from the power line state detecting means indicates a power line abnormality And / or when the output of the signal line state detecting means indicates an abnormality of the signal line, information indicating that the abnormality has occurred is wirelessly transmitted by the wireless transmitting means using the battery as a power supply.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of a heat ray sensor according to the present invention, wherein 1 is an optical system, 2 is a signal processing unit, 3 is a main control unit, 4 is a state detection unit, 5 is a signal line, Reference numeral 6 denotes a power supply circuit, 7 denotes a state detection unit, 8 denotes a power supply line, 9 denotes a charging circuit, 10 denotes a battery, 11 denotes a sub-control unit, 12 denotes a wireless transmission unit, and 13 denotes an antenna.

The optical system 1 includes a reflecting mirror for forming a security zone and a pyroelectric element for detecting heat rays. The output signal of the pyroelectric element is subjected to predetermined processing by the signal processing unit 2 and is taken into the main control unit 3. The signal processing unit 2
Are well known, and therefore description thereof is omitted.

The main control unit 3 is constituted by a CPU and its peripheral circuits. The main control unit 3 determines whether or not a person has moved based on a signal from the signal processing unit 2, and determines that a person has moved. 5 to output an alarm signal.

The state detecting section 4 detects the state of the signal line 5, and outputs a signal indicating an abnormality when the signal line 5 is disconnected or short-circuited. Similarly, the state detection unit 7 detects the state of the power supply line 8, and outputs a signal indicating abnormality when the power line 8 is disconnected or short-circuited. In addition, since the method of detecting that the signal line or the power supply line has been disconnected or short-circuited is well known, a detailed description of the state detection unit 4 and the state detection unit 7 will be omitted.

The power supply circuit 6 supplies a power supply voltage supplied by a power supply line 8 to the pyroelectric element of the optical system 1, the signal processing unit 2, the main control unit 3, the state detection unit 4, and the state detection unit 7. is there.

The charging circuit 9 is for charging the battery 10 from the power supply circuit 6. The battery 10 supplies a power supply voltage to the power supply circuit 6, the sub control unit 11, and the wireless transmission unit 12.

The sub-control unit 11 comprises a CPU and its peripheral circuits. When a signal indicating an abnormality of the signal line 5 is received from the state detection unit 4, a signal indicating an abnormality of the power line 8 is received from the state detection unit 7. When the information is received, the wireless transmission unit 12 is activated to wirelessly transmit information indicating that an abnormality has occurred. At this time, it is clear that the power supply voltage is supplied from the battery 10 to the sub control unit 11 and the wireless transmission unit 12.

Next, the operation will be described. First, when both the signal line 5 and the power supply line 8 are normal, the pyroelectric element of the optical system 1, the signal processing unit 2, and the main control unit 3 operate with the power supply voltage from the power supply circuit 6, so that the main control The unit 3 outputs an alarm signal to the signal line 5 when determining that the signal from the signal processing unit 2 indicates the movement of a person. At this time, the sub control unit 11 outputs a signal indicating that the signal line 5 is normal from the state detection unit 4, and the state detection unit 7 also outputs the power line 8
Does not perform any processing because it outputs a signal indicating that is normal. Further, at this time, the battery 10 is constantly charged by the charging circuit 9.

Next, in the case where the signal line 5 is disconnected or short-circuited, at this time, since the state detection unit 4 outputs a signal indicating an abnormality, the sub-control unit 11 activates the radio transmission unit 12. To transmit information indicating that an abnormality has occurred in the signal line 5. As a result, the information is stored in the antenna 13
Will be transmitted wirelessly.

Therefore, by receiving the radio wave from the antenna 13, it is possible to know that an abnormality has occurred in the signal line 5.

Next, in the case where the power supply line 8 is disconnected or short-circuited, at this time, since the state detection section 7 outputs a signal indicating abnormality, the sub-control section 11 activates the radio transmission section 12. To transmit information indicating that an abnormality has occurred in the power supply line 8. As a result, the information is stored in the antenna 13
Will be transmitted wirelessly. At this time, power is not supplied to the power supply circuit 6 from the power supply line 8, but the voltage supplied from the battery 10 is applied to the optical system 1, the signal processing unit 2, the main control unit 3 and the like, so When the main control unit 3 determines that the signal from the signal processing unit 2 indicates the movement of a person, the main control unit 3 outputs an alarm signal to the signal line 5.

Accordingly, by receiving the radio wave from the antenna 13, it is possible to know that an abnormality has occurred in the power supply line 8.

Next, when the signal line 5 and the power supply line 8 are simultaneously disconnected or short-circuited at the same time, the state detector 4 and the state detector 7 output signals indicating an abnormality at this time. The sub control unit 11 is a wireless transmission unit 1
2 is activated to transmit information indicating that an abnormality has occurred in the signal line 5 and the power supply line 8. As a result, the information is wirelessly transmitted from the antenna 13.

Therefore, by receiving the radio wave from the antenna 13, it is possible to know that an abnormality has occurred in the signal line 5 and the power supply line 8.

As described above, according to this hot-wire sensor, the signal line 5 and / or the power supply line 8 are disconnected,
Alternatively, even when a short circuit occurs, it is possible to wirelessly report that an abnormality has occurred.

As described above, one embodiment of the present invention has been described. However, it is obvious to those skilled in the art that the present invention is not limited to the above-described embodiment, and that various modifications are possible.

[Brief description of the drawings]

FIG. 1 is a diagram showing one embodiment of a heat ray sensor according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical system, 2 ... Signal processing part, 3 ... Main control part, 4 ... State detection part, 5 ... Signal line, 6 ... Power supply circuit, 7 ... State detection part,
8 power line, 9 charging circuit, 10 battery, 11 sub-control unit, 12 wireless transmission unit, 13 antenna.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI G08B 29/06 G01V 9/04 T

Claims (1)

[Claims] 1. A hot-wire sensor to which power is supplied by a power supply line and outputs an alarm signal by a signal line, a power supply line state detecting means for detecting a state of the power supply line, and a signal line state for detecting a state of the signal line. A detection unit, a battery, and a wireless transmission unit, wherein the output from the power line state detection unit indicates an abnormality in the power line and / or the output from the signal line state detection unit indicates an abnormality in the signal line. A heat ray sensor that wirelessly transmits information indicating that an abnormality has occurred by a wireless transmission unit using a battery as a power supply.