JPH08129690A - Home security device - Google Patents

Abstract

PURPOSE: To prevent operation defect of a receiver due to line fault by outputting a monitoring-time presence voltage and a detection-time presence voltage by a detector, outputting the no-voltage-time line fault signal of a detection line by a receiver, and sending a dummy detection-time presence voltage to an outdoor machine and turning off a line fault signal circuit when the detection-time presence voltage is detected. CONSTITUTION: This device consists of a gas detector G, receiver R and outdoor machine S. The receiver R generates the monitoring-time presence voltage of 6V when the gas detector G is monitored, and when this 6V is sent out to the gas detector input terminal G+ of the receiver R through the gas detection line L, no current flows to the base of the transistor Q6 of a line fault signal circuit, so that the line fault signal is not sent to the line fault input side I1 of a receiver control circuit CPC. Further, when the gas detector G does not operate owing to a fault and a power failure of the gas detection line L, the monitoring-time presence voltage becomes no voltage of 0V and the line fault input is supplied to the line fault input side I1 of a CPU. The CPU processes the input to perform line fault alarm operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a home security device, and more particularly to a home security device capable of preventing malfunction of a receiver due to a failure of a line connecting a gas detector and an outdoor unit to the receiver.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, a gas detector G, a fire detector P, an emergency button H, a crime prevention sensor I,
A home security device including a bath / toilet call sensor J, a receiver R, and an outdoor unit S has been proposed. The fire detector P, the gas detector G, the emergency button H, the crime prevention sensor I, and the bath / toilet call sensor J are respectively a detector input circuit 10, a detector input circuit 11, an emergency button input circuit 12, and a crime prevention sensor input. It is input to the control CPU via the circuit 13 and the bath / toilet call input circuit 14.

The fire detector P, the gas detector G, and the emergency button H are also input to the outdoor unit S via the detector input circuit 10, the detector input circuit 11, and the emergency button input circuit 12, respectively. The control CPU, if there is an alarm signal from the fire detector P, the gas detector G, the emergency button H, the security sensor I, or the bath / toilet call sensor J, the alarm sound generation circuit 1
6. Sound the speaker SP from the alarm sound amplification circuit 17,
Moreover, the relay Ry is driven by the relay control circuit 15, and the contact c is changed from the contact Nc that is always connected to the call line L ₁ to the contact No.
And the alarm sound is also generated from the outdoor unit S. further,
An alarm is displayed by the alarm indicator light circuit 18. The alarm sound is stopped by the alarm sound stop button 19. Reference numeral 20 indicates a power supply circuit.

The receiver R of this home security device
The gas detector G has a circuit configuration shown in FIG. 4, and the gas detector G is connected to the gas detector input terminal G + of the receiver R via the gas detection line L. The gas detector input terminal G + is also connected to the outdoor unit S via the gas detector state output terminal GT. Gas detector input terminal G + is a diode D ₁ the anode, through the cathode is connected to the cathode of the Zener diode ZD _1, the anode of the Zener diode ZD ₁ is connected to the base of the transistor Q ₁₁ via the resistor R _1, transistor The base of Q ₁₁ is connected to the other end of the resistor R ₂ whose one end is connected to the reference potential point.

The emitter of the transistor Q ₁₁ is connected to the reference potential point, and the collector is connected to the power source + via resistors R ₈ and R _7.
It is connected to V _CC . The base of the transistor Q ₁₃ is connected to the connection point of the resistors R ₈ and R ₇ , and the emitter is the power supply + V.
Connected to _CC , the collector is the CPU gas leak input side I ₂
It is connected to the. The gas leak input side I ₂ of the CPU is connected to the other end of the resistor R ₁₆ whose one end is connected to the reference potential point.

The cathode of the diode D ₁ is a resistor R ₃ ,
Connected to the reference potential point via the R _4, R _5, resistors R ₄ and R ₅
The base of the transistor Q ₁₂ is connected to the connection point of. The emitter of the transistor Q ₁₂ is connected to the reference potential point, and the collector is connected to the power source + V _CC via the resistor R ₉ . The connection point between the resistors R ₃ and R ₄ is connected to the cathode of the diode D ₂ via the resistor R ₆ , and the anode is a fault alarm stop switch SW used when the gas detector G is not connected.
_It is connected via ₁ to the power supply + V _CC .

The connection point between the anode of the diode D ₂ and the failure alarm stop switch SW ₁ is connected to the reference potential point via the resistor R _{10 and the} light emitting diode D ₂₁ . The collector of the transistor Q ₁₂ is connected to the reference potential point through a resistor R ₁₁ and R _12, the connection point of the resistors R ₁₁ and R ₁₂ are the transistor Q
Connected with ₁₅ bases. The emitter of the transistor Q ₁₅ is connected to the reference potential point, and the collectors are resistors R ₁₄ and R
_It is connected to the power source + V _CC via ₁₃ .

The base of the transistor Q ₁₄ is connected to the connection point between the resistors R ₁₄ and R ₁₃ , and the emitter is connected to the power supply + V _CC . The collector is connected to the line fault input side I ₁ of the CPU. The other end of the resistor R ₁₅ whose one end is connected to the reference potential point is connected to the line fault input side I ₁ of the CPU. The gas detector G outputs a two-step voltage with a voltage at the time of monitoring and a voltage at the time of detection, and the output voltage is as shown in Table 1.

[0009]

[Table 1]

The voltage with which the gas detector G is monitored is 6 V, and is sent to the gas detector input terminal G + of the receiver R through the gas detection line L, and is fed through the diode D ₁ and the resistors R ₃ and R ₄ . transistor Q ₁₂ are turned on Te, Tsu since Ena diode ZD ₁ has a threshold that does not conduct the 6V, the transistor Q ₁₁ is turned off, thus the transistor Q ₁₃ is not given base bias to the transistor Q ₁₃ is turned off , on the transistor Q ₁₅ is not given base bias to the transistor Q ₁₅ is turned off transistor Q _12, thus the transistor Q ₁₄ is not given base bias to the transistor Q ₁₄ is turned off, the gas leakage input I _2, No gas leakage input or line obstacle input is applied to the line obstacle input side I ₁ .

The gas detector G detects a gas leak and detects a gas leak.
When the output of the intellectual device G becomes 12V which is a voltage with detection, this 1
The voltage of 2V is the gas of the receiver R through the gas detection line L.
It is sent to the detector input terminal G +. This 12V voltage is
Diode D₁Anode, cathode, Zena Daio
De ZD₁, Resistance R₁Through transistor Q₁₁To the base of
Applied, transistor Q ₁₁Turns on. Transis
Q₁₁Is turned on, the transistor Q₁₃Is turned on,
CPU gas leak input side I₂Provides gas leak input.

The CPU processes the gas leak input and performs an alarm operation such as sending an alarm sound and lighting an indicator lamp. Also,
The outdoor unit S receives 12V via the gas detector status output terminal GT.
When the voltage is detected, an alarm sound is emitted and an outdoor display such as lighting of an indicator lamp is performed. When the gas detector G does not operate due to a failure of the gas detection line L or a power failure, the input voltage of the gas detector status output terminal GT is 6V with a voltage at the time of monitoring (standby).
Becomes 0V with no voltage. When the input to the gas detector status output terminal GT changes from 6V to 0V, the transistor Q ₁₂ turns off. When the transistor Q ₁₂ is turned off, the power supply + V _CC ,
Via a resistor R _9, R _11, transistor Q ₁₅ current flows to the transistor Q ₁₅ Nobesu is turned on. When the transistor Q ₁₅ is turned on, the transistor Q ₁₄ is also turned on and gives a line fault input to the line fault input side I ₁ of the CPU.

The CPU processes the line fault input to perform a line fault warning operation, and outputs a warning sound and an alarm operation such as lighting of an indicator lamp. The fault alarm stop switch SW ₁ is used to stop the fault alarm during construction when the gas detector G is not connected. The fault alarm stop switch SW ₁
When closing the power supply + V _CC, closed faults alarm stop switch SW _1, the anode of the diode D _2, the cathode, the resistance R _6, R _4, base bias is applied to the base of the transistor Q _12, the transistor Q ₁₂ Turns on. When transistor Q ₁₂ turns on, transistors Q ₁₅ and Q
₁₄ is turned off and the line fault input input to the line fault input side I ₁ of the CPU is stopped.

The operation of the transistors Q _{11 to} Q ₁₄ , the line fault input side I _{1 of the} CPU and the gas leakage input side I ₂ (both are H
Table 2 shows the situation when the level is active.

[0015]

[Table 2]

When the line connecting the gas detector status output terminal GT and the outdoor unit S is short-circuited, the gas detector input terminal G
+ Becomes 0V as shown in Table 2, and even if the gas detector G detects a gas leak and outputs a voltage of 12V at the time of detection, no gas leak input is given to the gas leak input side I ₂ and it is normal. Gas leak indication is not possible.

[0017]

In such a home security device, when the state of the gas detector G is viewed by the outdoor unit S, a gas detector state output terminal GT is provided in parallel with the gas detector input terminal G +. It is necessary to provide a gas detector status output terminal GT in parallel with the gas detector input terminal G +. When a short-circuit fault occurs between the outdoor unit S and the receiver R, the receiver does not operate normally ( There is a drawback that it brings about (unreported).

[0018]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is possible to prevent a malfunction of the receiver due to a failure of the line connecting the gas detector and the outdoor unit to the receiver. The purpose is to provide a security device.

[0019]

A home security device according to the present invention comprises a detector for outputting a two-stage voltage having a voltage for monitoring and a voltage for detecting, which are different at the time of monitoring and at the time of detection, and the detector is a detection line. A receiver having a receiver control circuit connected through the receiver and an outdoor unit connected to the receiver. The receiver has a voltage level detection circuit for detecting a two-stage voltage and a no-voltage detection line. A line fault signal circuit that detects and outputs a line fault signal to the receiver control circuit,
When a voltage at detection is detected by the voltage level detection circuit, a detection time output circuit that transmits a detection time signal to the receiver control circuit and also transmits a pseudo detection time voltage to the outdoor unit,
When the voltage level detection circuit detects a voltage during monitoring, the line fault signal circuit is turned off, and a monitoring time output circuit for transmitting the pseudo monitoring time voltage to the outdoor unit is provided.

Further, the home security device according to the present invention includes a detector for outputting a two-step voltage having a voltage for monitoring and a voltage for detection which are different at the time of monitoring and at the time of detecting, respectively.
A receiver having a receiver control circuit connected to the detector through a detection line, and an outdoor unit connected to the receiver,
The receiver has a voltage level detection circuit that detects a two-stage voltage, a line fault signal circuit that detects a no-voltage on the detection line and outputs a line fault signal to the receiver control circuit, and a voltage level detection circuit When a voltage is detected, a detection time output circuit that transmits a detection time signal to the receiver control circuit, a detection time transmission output circuit that transmits a pseudo detection time voltage to the outdoor unit by the receiver control circuit, and a voltage level When the detection circuit detects a voltage with monitoring, the line fault signal circuit is turned off.
It is provided with a monitoring time output circuit that causes F and a monitoring time transmission output circuit that transmits a pseudo monitoring time voltage to the outdoor unit by the receiver control circuit.

Further, in these home security devices, when the detector is not connected to the receiver via the detection line, the line fault signal circuit is turned off by operating the switch.
It is equipped with a failure alarm stop circuit for F.

[0022]

The detector outputs a voltage at the time of monitoring and a voltage at the time of detection which are different at the time of monitoring and at the time of detecting. The monitored voltage and the detected voltage are sent to the receiver via the detection line.

In the receiver, the voltage level detection circuit detects a two-step voltage. The line fault signal circuit outputs a line fault signal to the receiver control circuit when detecting no voltage on the detection line. The detection-time output circuit transmits the detection-time signal to the receiver control circuit and the pseudo-detection-time voltage to the outdoor unit when the detection-time voltage is detected by the voltage level detection circuit.

The monitoring output circuit turns off the line fault signal circuit when the voltage level detection circuit detects the monitoring voltage, and transmits the pseudo monitoring voltage to the outdoor unit. Further, if the switch is operated when the detector is not connected to the receiver via the detection line, the fault alarm stop circuit is activated to turn off the line fault signal circuit.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a home security device according to the present invention will be described in detail below with reference to the drawings. As shown in FIG. 1, the home security device according to the present invention includes a gas detector G that outputs a two-stage voltage with a monitoring voltage and a detection voltage that are different during monitoring and detection. A receiver R having a receiver control circuit CPU connected through a gas detection line L, and an outdoor unit S connected to the receiver, the receiver R being a voltage level detection circuit for detecting a two-step voltage. Transistors Q ₁ and Q _{2 as}
And a transistor Q ₆ as a line fault signal circuit that detects a no-voltage in the gas detection line L and outputs a line fault signal to the receiver control circuit CPU, and transistors Q ₁ and Q ₂ as voltage level detection circuits. A transistor Q ₃ as a detection time output circuit that transmits a detection time signal to the receiver control circuit CPU when the temporary voltage is detected, and also transmits a pseudo detection time voltage to the outdoor unit S, and a voltage level detection circuit When the voltage during monitoring is detected by, the transistor Q ₆ as a line fault signal circuit is turned off, and the transistor Q ₄ as a monitoring output circuit for transmitting the pseudo voltage during monitoring to the outdoor unit S and the zener diode. Z _D2
It has and.

When the gas detector G is not connected to the receiver R via the gas detection line L, the switch SW ₁
By operating the transistor Q as a line fault signal circuit
It is provided with a transistor Q ₅ as a fault alarm stop circuit for turning OFF ₆ . As described above, the home security device includes the gas detector G for detecting gas leakage, the receiver R, and the outdoor unit S. The gas detector G is connected to the gas detector input terminal G + of the receiver R via the gas detection line L. Connected with.

This will be described in detail. Gas detector input terminal G
+ The anode of the diode D _1, through the cathode is connected to the cathode of the Zener diode ZD _1, the anode of the Zener diode ZD ₁ is connected to the base of the transistor to Q ₁ voltage level detection circuit via a resistor R _1, transistor The base of Q ₁ is connected to the other end of a resistor R ₂ whose one end is connected to the reference potential point.

The emitter of the transistor Q ₁ is connected to the reference potential point, and the collector is connected to the power source + via resistors R ₆ and R _5.
It is connected to V _CC . The base of the transistor Q ₃ of the output circuit at the time of detection is connected to the connection point of the resistors R ₆ and R ₅ , the emitter is connected to the power supply + V _CC , and the collector is the I ₂ input side for gas leakage of the receiver control circuit CPU. It is connected to the. The other end of the resistor R ₁₈ , one end of which is connected to the reference potential point, is connected to the I ₂ input side for gas leakage of the receiver control circuit CPU.

The cathode of the diode D ₁ has resistors R ₃ and R ₄
The base of the transistor Q ₂ of the voltage level detection circuit is connected to the reference potential point through the resistor R ₃ and R ₄ . The emitter of the transistor Q ₂ is connected to the reference potential point, and the collector is connected to the power source + V _CC via the resistors R ₉ and R ₈ . The base of the transistor Q ₄ of the monitoring output circuit is connected to the connection point of the resistors R ₉ and R _8, the power supply + V _CC is connected to the emitter, and the collector is
The other end of the resistor R _12, whose one end is connected to the reference potential point, is connected through the resistor R ₇ and the anode and cathode of the diode D ₃ .

The other end of the resistor R ₁₂ is connected to the transistor Q ₅ via the cathode and anode of the diode D ₄ and the resistor R _11.
Of the power source + V _CC . The other end of the resistor R ₁₂ has a zener diode ZD _3
Is connected to the power source + V _CC through the anode, the cathode, and the resistor R ₁₅ . The other end of the switch SW ₁ , one end of which is connected to the reference potential point, has the power supply + V _CC through the resistors R ₁₄ and R _13.
Connected with.

The base of the transistor Q ₅ is connected to the connection point of the resistors R ₁₄ and R ₁₃ , and the collector is connected to the reference potential point via the resistor R ₁₀ and the light emitting diode D ₂₁ . The base of the transistor Q ₆ is connected to the connection point of the cathode of the Zener diode ZD ₃ and the resistor R ₁₅ , the emitter is connected to the power supply + V _CC, and the collector is the receiver control circuit CPU.
Is connected to the line fault input side I ₁ . The other end of the resistor R ₁₇ whose one end is connected to the reference potential point is connected to the line fault input side I ₁ input side of the receiver control circuit CPU.

The gas detector status output terminal GT to which the outdoor unit S is connected is connected to the transistor Q of the detection time output circuit via the resistor R ₁₆ and the cathode and anode of the diode D _5.
The connection point of the resistor R ₁₆ and the cathode of the diode D ₅ is connected to the collector of _{3 and} the collector of the transistor Q ₄ of the monitoring output circuit via the cathode and anode of the diode D ₂ and the anode and cathode of the zener diode ZD _2. It is connected.

In the receiver R of the home security device configured as described above, the voltage at the time of monitoring (standby) of the gas detector G is 6V (voltage range is 5 to 7V). Is sent to the gas detector input terminal G + of the receiver R via the gas detection line L, the anode and cathode of the diode D ₁ of the voltage level detection circuit, the resistor R _{3 ,}
Current flows to the base of the transistor Q _2, the transistor Q ₂ is turned on. When transistor Q ₂ is turned on, current flows also through the resistor R ₉ to the base of the transistor Q _4, the transistor Q ₄ is turned on for monitoring at the output circuit.
When the transistor Q ₄ is turned on, a current flows through the route of the resistor R ₇ , the diode D ₃ and the resistor R ₁₂ . Due to this current, the voltage across the resistor R ₁₅ drops and no current flows through the base of the transistor Q ₆ of the line fault signal circuit, and the line fault signal is not transmitted to the line fault input side I ₁ of the receiver control circuit CPU.

Further, since the Zener diode ZD ₁ has a threshold that does not conduct the 6V, the transistor Q ₁ is turned off, thus the transistor Q ₃ is not given base bias to the transistor Q ₃ is turned off, the receiver control circuit No gas leak input is transmitted to the gas leak input side I ₂ of the CPU. The collector of the transistor Q ₄ are, because it is also connected to the cathode of the Zener diode ZD _2, Zener cathode of diode ZD _2, the anode, the anode of the diode D _2, the cathode, the pseudo monitored when a voltage through the resistor R ₁₆ is a gas It is transmitted to the detector status output terminal GT.

Zener voltage V of zener diode ZD _{2
If ZD2} is, for example, V _ZD2 = 4.6, the voltage of (V _CC −V _CEQ4 −V _ZD2 −V _D2 ) · R _Z / (R _Z + R ₁₆ ) appears at the gas detector state output terminal GT. (Here, V _CEQ4 is the transistor Q ₄
, V _D2 is the voltage of the diode D ₂ , and R _Z is the input resistance of the outdoor unit S).

V _CC = 12V, V _CEQ4 = 0.2V, V _ZD2 =
4.6, V _D2 = 0.6 V, and R _Z of 10 KΩ, the gas detector input terminal G + is about 6 V, which is equivalent to the gas detector monitoring voltage. When a gas leak is detected, a voltage of 12 V (voltage range of 10 V to 27 V) at the time of detection is sent from the gas detector G to the gas detector input terminal G + of the receiver R via the gas detection line L.

This 12V is the anode of the diode D ₁ ,
The voltage is applied to the base of the transistor Q ₁ through the cathode, the Zener diode ZD ₁ and the resistor R ₁ , and the transistor Q ₁ is turned on. When the transistor Q ₁ turns on, the power supply +
V _CC , emitter and base of transistor Q ₃ , resistor R ₆ ,
A current flows through the collector / emitter path of the transistor Q ₁ of the voltage level detection circuit, and the transistor Q _{3 of the} output circuit at the time of detection is turned on.

Transistor Q₃When turned on, the receiver
Gas leak input side I of control circuit CPU₂Gas leak input
give. The receiver control circuit CPU processes this gas leak input.
The gas leak input alarm is activated and an alarm sound is sent.
Alarms such as output and lighting of indicator lights. The outdoor unit S contacts
When the gas detector status output terminal GT is connected,
Output circuit transistor Q₃The emitter to the diode
D_FiveAnode, cathode, resistance R ₁₆Pseudo detection via
The voltage is output.

If the input resistance on the outdoor unit S side is 10 KΩ or more, and the resistance value of the resistor R ₁₆ is 1 KΩ, the gas detector status output terminal GT is (V _CC -V _CEQ3 -V _D5 ) R _Z /
The voltage of (R _Z + R ₁₆ ) appears. V _CC = 12V, V
_{CEQ3 = 0.2V, V D5 = 0.6V} , if 10KΩ input resistance of the R _Z outdoor machine S side, gas detector input terminal G + is equivalent to approximately 10.2V next gas detector output ( Here, V _CEQ3 is the collector and emitter voltage of the transistor Q ₃ , and V _D5 is the voltage of the diode D _5. )

When the gas detector G does not operate due to a failure in the gas detection line L or a power failure, the gas detector input terminal G + has a voltage of 6 V at the time of monitoring (at the time of standby) of 0 V without voltage.
When the gas detector input terminal G + changes from 6V to 0V, the transistor Q ₂ turns off. When the transistor Q ₂ turns off, the transistors Q ₄ and Q ₅ turn off and the transistor Q ₆ turns on. When the transistor Q ₆ turns on,
A line fault input is given to the line fault input side I ₁ of the CPU.

The CPU processes the line fault input to perform a line fault warning operation, and outputs a warning sound and performs an alarm operation such as turning on an indicator lamp. Even if the gas detector status output terminal GT is short-circuited during monitoring and detection, if I _CQ3 ≥ (V _CC -V _CEQ3 -V _D5 ) / R ₁₆ + I _I2 , the resistance R ₁₆ becomes a current limiting resistance and reception The signal transmission function of the machine control circuit CPU to the gas leak input side I ₂ is secured and there is no hindrance (where I _CQ3 is the collector current of the transistor Q ₃ and I _I2 is the gas leak input side I ₂ current, respectively). ).

Operation of the transistors Q _{1 to} Q ₆ and line obstacle input side I ₁ and gas leak input side I _{2 of the} receiver control circuit CPU
Table 3 shows the situation for (the H level is active in both cases)
Shown in

[0043]

[Table 3]

The failure alarm stop switch SW ₁ is in when not connected to the receiver R is a gas detector G, intended for use when a fault alarm stop during the construction, failure by the operation of the fault alarm stop switch SW ₁ The transistor Q ₅ of the alarm stop circuit is turned on, which turns off the transistor Q ₆ of the line fault signal circuit to stop the fault alarm. As shown in FIG. 2, as another embodiment, a home security device according to the present invention is a gas detector that outputs a two-stage voltage with a monitoring voltage and a detection voltage that are different during monitoring and detection. G, a gas detector G is connected via a gas detection line L, a receiver R having a receiver control circuit CPU, and an outdoor unit S connected to the receiver R. The receiver R has two stages. Transistors Q ₁ and Q ₂ as a voltage level detection circuit for detecting a voltage and a transistor Q as a line fault signal circuit for detecting a no-voltage in the gas detection line L and outputting a line fault signal to the receiver control circuit CPU.
₆ and transistors Q ₁ and Q as a voltage level detection circuit
When the voltage at the time of detection is detected by ₂ , the transistor Q ₃ as a detection time output circuit which transmits a signal at the time of detection to the receiver control circuit CPU, and the pseudo voltage at the detection time to the outdoor unit S by the receiver control circuit CPU When a monitoring voltage is detected by the transistor Q _3A as a transmission output circuit at the time of detection and the transistors Q ₁ and Q ₂ as a voltage level detection circuit, the transistor Q ₃ as a line fault signal circuit.
A transistor Q ₄ as a monitoring output circuit for turning OFF ₆ and a transistor Q _4A as a monitoring transmission output circuit for transmitting a voltage during pseudo monitoring to the outdoor unit S by the receiver control circuit CPU and a zener diode Z _D2 . I have it.

When the gas detector G is not connected to the receiver R via the gas detection line L, the switch SW ₁
By operating the transistor Q as a line fault signal circuit
It is provided with a transistor Q ₅ as a fault alarm stop circuit for turning OFF ₆ . In this embodiment, the receiver R is the receiver control circuit CPU provided with the outdoor unit control outputs O ₁ and O ₂ , and the gas detector G is connected via the gas detection line L as shown in FIG. Gas detector input terminal G of receiver R
Connected to +.

The gas detector input terminal G + is a diode D ₁
Zener diode ZD ₁ through the anode and cathode of
Of the zener diode ZD ₁ is connected to the base of the transistor Q ₁ of the voltage level detection circuit via the resistor R _1, and one end of the base of the transistor Q ₁ is connected to the reference potential point. The other end of R ₂ is connected.

The emitter of the transistor Q ₁ is connected to the reference potential point, and the collector is connected to the power source + via the resistors R ₆ and R _5.
It is connected to V _CC . The emitter of the transistor Q _{3 in} the detection output circuit is the power source + V _CC, and the bases are resistors R ₆ and R ₅
, And the collector is connected to the gas leakage input side I ₂ of the receiver control circuit CPU. The gas leak input side I ₂ is connected to the reference potential point by a resistor R ₂₆ .

The cathode of the diode D ₁ has resistors R ₃ and R ₄
The base of the transistor Q ₂ of the voltage level detection circuit is connected to the reference potential point through the resistor R ₃ and R ₄ . The emitter of the transistor Q ₂ is connected to the reference potential point, and the collector is connected to the power source + V _CC via the resistors R ₉ and R ₈ . The connection point of the resistors R ₉ and R ₈ is connected to the base of the transistor Q ₄ of the monitoring output circuit, and the emitter is connected to the power supply + V _CC . The collector of the transistor Q ₄ is connected to the other end of the resistor R ₁₂ whose one end is connected to the reference potential point via the resistor R ₇ and the anode and cathode of the diode D ₃ .

The other end of the resistor R ₁₂ is connected to the transistor Q ₅ via the cathode and anode of the diode D ₄ and the resistor R _11.
Of the power source + V _CC . A switch SW whose one end is connected to the reference potential point
The other end of ₁ is connected to the power source + V _CC via resistors R ₁₄ and R ₁₃ .

The connection point of the resistors R ₁₄ and R ₁₃ is the transistor Q.
₅ based is connected, the other end of the resistor R _12, the anode of the Zener diode ZD _3, the cathode, via the resistor R ₁₅ is connected to the power source + V _CC. Zener diode ZD ₃
The connection point between the cathode and the resistor R ₁₅ is connected to the base of the transistor Q ₆ of the line fault signal circuit, the emitter power +
It is connected to V _CC . The collector of the transistor Q ₆ is connected to the line fault input side I ₁ of the receiver control circuit CPU. The line fault input side I ₁ is connected to the reference potential point by a resistor R ₂₅ .

Gas detector state in which the outdoor unit S is connected
The output terminal GT has a resistor R₁₆, Diode D_FiveThe Cassaw
Transistor of the transmission output circuit when detecting through the anode and anode
Q_3AIs connected to the collector of and the emitter is the power supply + V_CCWhen
It is connected. One end of the base is the power supply + V_CCConnected to
Resistance R_5AConnected to the other end of the resistor R_5AThe other end of the resistor R
_6AThrough the transistor Q_{twenty two}Connected with the collector of
There is. Transistor Q_{twenty two}The emitter of is connected to the reference potential point
The base is a resistor R_{twenty four}Via the receiver control circuit CPU
Outdoor unit control output O₂Connected with. Transistor
Q_{twenty two}The base of the resistor has a resistor whose one end is connected to the reference potential point.
R_{twenty three}The other end of is connected.

Resistance R₁₆And diode D_FiveThe cathode contact
Continuation is diode D₂Cathode, anode, Tshenada
Iodo ZD₂When monitoring via the anode and cathode of
Transistor output circuit transistor Q_4AConnected with the collector of
And the emitter is the power supply + V_CCConnected with. The base is
One end is power supply + V_CCResistor R connected to_8AThe other end of is connected
Resistance R_8AThe other end of the resistor R_9AThrough the transistor
Q_{twenty one}Connected with the collector of. Transistor Q_{twenty one}of
The emitter is connected to the reference potential point and the base is a resistor R _{twenty two}To
The outdoor unit control output O of the receiver control circuit CPU via₁Contact with
Has been continued. Transistor Q_{twenty one}One end is the base of
Resistance R connected to the quasi-potential point_{twenty one}The other end of is connected
You.

Also in this embodiment, the transistor Q ₂ of the voltage level detection circuit of the gas detector G is turned on at the time of monitoring (during standby) as in the above-described embodiment. When the transistor Q ₂ is turned on, no current flows through the base of the transistor Q ₆ of the line fault signal circuit, and the line fault signal is not transmitted to the line fault input side I ₁ of the receiver control circuit CPU. The receiver control circuit CPU is a line obstacle input side I ₁
Is at the L level, the transistor Q of the transmission output circuit during the monitoring from the outdoor unit control output O ₁ through the transistor Q _21.
4A , Zener diode Z _D2 transmits voltage to the outdoor unit S during pseudo monitoring.

At the time of detection, the receiver control circuit CPU takes in the gas leak signal once to the gas leak input side I ₂ by means of the transistor Q ₁ , and as a transmission output circuit at the time of detection from the outdoor unit control output O ₂ via the transistor Q ₂₂ . The transistor Q _3A transmits a voltage with a false detection to the outdoor unit S. In the case of line fault as in the previous embodiment, the receiver control circuit CPU gives the line fault signal to the line fault input side I ₁ by the transistor Q ₆ .

The operation of the transistors Q _{1 to} Q ₆ and the receiver control circuit CPU when the respective signals are once taken in the receiver control circuit CPU and the signals are sent from the outdoor unit control outputs O ₁ and O ₂ to the outdoor unit S Table 3 shows the situation with respect to the line fault input side I ₁ and the gas leak input side I ₂ (in both cases, the H level is active). In this embodiment, the transistors Q _3A and Q _4A are replaced with the transistors Q ₃ and Q ₄ shown in FIG. 1, and the outdoor unit control output O ₁ ,
If O ₂ is read as the line fault input side I ₁ and the gas leakage input side I ₂ , the operation of the transistors in each circuit is the same.

[0056]

The home security device according to the present invention can prevent the malfunction of the receiver due to the failure of the line connecting the detector and the outdoor unit to the receiver. Further, when the detector is not connected to the receiver via the detection line, the failure alarm can be stopped during construction by operating the switch.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of a receiver in a home security device according to the present invention.

FIG. 2 is a circuit diagram showing another embodiment of the receiver in the home security device according to the present invention.

FIG. 3 is a schematic configuration diagram of a conventional home security device.

FIG. 4 is a circuit diagram of a receiver in a conventional home security device.

[Explanation of symbols]

G: Gas detector S: Outdoor unit R: Receiver CPU: Receiver control circuit Q ₁ , Q ₂ Transistor (voltage level detection circuit) Q ₃・ ・ ・ ・ ・ Transistor (detection output circuit) Q ₄・ ・ ・ ・ ・ ・ Transistor (monitoring output circuit) Z _D2・ ・ ・ Zener diode (monitoring) output circuit) Q ₅ · · · · · · transistor (fault alarm stop circuit) Q ₆ · · · · · · transistors (line fault signal circuit) Q _3A · · · · · · transistor (detection at the transmission output circuit) Q _4A・ ・ ・ ・ ・ ・ Transistor (transmission output circuit during monitoring) Z _D2・ ・ ・ ・ Zener diode (transmission output circuit during monitoring) SW ₁・ ・ ・ ・ ・ ・ Switch

Claims (3)

[Claims] 1. A detector (G) for outputting a two-stage voltage having a monitoring voltage and a detection voltage, which are different at the time of monitoring and at the time of detection, and the detector are connected via a detection line (L). Receiver (R) having receiver control circuit (CPU)
And an outdoor unit (S) connected to the receiver, wherein the receiver includes a voltage level detection circuit (Q ₁ , Q ₂ ) for detecting the two-stage voltage, and a no-voltage detection line. and detected and line fault signal line fault signal circuit for outputting to the receiver control circuit (Q _6), when the detection time of chromatic voltage detected by the voltage level detection circuit, the detection to the receiver control circuit A detection time output circuit (Q ₃ ) for transmitting a time signal and a pseudo detection time voltage to the outdoor unit, and the line fault signal when the monitoring time voltage is detected by the voltage level detection circuit. A home security device comprising a monitoring output circuit (Q ₄ , Z _D2 ) for turning off the circuit and transmitting a voltage during pseudo monitoring to the outdoor unit. 2. A detector (G) that outputs a two-stage voltage with a monitoring voltage and a detection voltage, which are different during monitoring and detection, and the detector are connected via a detection line (L). Receiver (R) having receiver control circuit (CPU)
And an outdoor unit (S) connected to the receiver, wherein the receiver includes a voltage level detection circuit (Q ₁ , Q ₂ ) for detecting the two-stage voltage, and a no-voltage detection line. and detected and line fault signal line fault signal circuit for outputting to the receiver control circuit (Q _6), when the detection time of chromatic voltage detected by the voltage level detection circuit, the detection to the receiver control circuit Detection time output circuit (Q ₃ ) that transmits an hour signal
A detection-time transmission output circuit (Q _3A ) for transmitting a pseudo detection time voltage to the outdoor unit by the receiver control circuit; and the line when the voltage level detection circuit detects the monitoring time voltage. A monitoring time output circuit (Q ₄ ) for turning off the fault signal circuit and a monitoring time transmission output circuit (Q _4A , Z _D2 ) for transmitting a pseudo monitoring time voltage to the outdoor unit by the receiver control circuit were provided. A home security device characterized by the above. 3. A fault alarm stop circuit (Q ₅ ) for turning off the line fault signal circuit by operating a switch (SW ₁ ) when the detector is not connected to the receiver via the detection line. The home security device according to claim 1 or 2, wherein