JPS588394A - 2-wire type crime prevention monitor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to a two-wire crime prevention monitoring circuit, and more particularly, to a crime prevention detector and a system that receives an output signal from the crime prevention detector and issues or displays an alarm. receiver and 2
This invention relates to a monitoring circuit that connects the two wires with a wire, supplies power supply voltage from the receiver side to the detector using these two wires, transmits the output signal of the detector to the receiver side, and can also detect short circuits during disconnections in these two wires. .

For example, Figure 1 to Various devices have been proposed as shown in Figure 2. Figure 1 shows a light beam alarm with a light receiver AI.
and the main body 81 with g4$1d, e, and using these two wires, the power for the light receiver M1 is supplied from the main body Bs[, and when the light receiving element 8 receives light, the transistor JI
T becomes conductive, and the alternating current signal caused by this conduction is inputted to the base of the second transistor 1 by the capacitor C1 to drive the output circuit. Therefore, g@d and @ also transmit the detector signal. Also, in the 1s diagram, 2.
With matte f6g! I! As a result, the series circuit of the switch corner, battery E1, and diode DI is connected in parallel with the series circuit of the alarm P and the diode, and the battery E3 is A series circuit of the switch corner and the diode A, and a series circuit of the alarm i and the diode) are connected in parallel. And, if you operate the 4th edge of the child device 3, the alarm Q of the control device will be activated, and if you operate the 7th corner of the swift of the genus bird, the alarm P of the child device will be activated. Therefore, transmission between slave unit A1 and R1Afb is possible using 8 wires j2g. In addition, a well-known power line transmission technique is a technique for transmitting a signal by superimposing a signal on the C1 power line and identifying the frequency and position of the signal on the receiver side.

- However, in the case of the conventional example shown in FIG. 11, disconnection cannot be detected. 14, in the conventional example shown in FIG. 2, if there is a disconnection, the notification #sP or Qtftl cannot be activated, and it is unclear whether or not there is a disconnection. Furthermore, in the case of power line carrier technology, both the transmitter and receiver had to be equipped with complex circuits to detect disconnections and short circuits, and the costs of the transmitter and receiver were high.

Therefore, the present invention uses two wires between the detection part and the receiver 1,
At the same time, these two wires are used to supply voltage to the detector, and the output signal of the detector is transmitted through these two wires.
This is a display that distinguishes between wire breaks and short circuits. Furthermore, t, the quantity is to turn off the delamination detection, and monitor the 3 wires, and use the detector at night! This is a book that tries to do the same thing with simple operations.

The present invention will be described in detail below based on one embodiment.

The sensor is a detector, and is configured to drive an oscillation circuit 8 by the output contact 2 of the sensor part 1.

4.4" is the power supply terminal of the detection delamination. The sensor part 1 and the oscillation a are connected to the sensor part 1 and the oscillation a
! DC voltage is supplied to path 8. Note that the output contact 2 of the sensor part l is connected to the base of the transistor T of the oscillation circuit 8.
Since it is grounded, Sen.

Part 1 of the sensor outputs an output. That is, when the contact is opened, the base potential of transistor JT rises, making it false.

A two-wire lt which oscillates with a period of frequency f1 determined by Cm a Lm and connects the power supply terminal 4.4' force detection delamination and the receiver I by a coupling coil L and a coupling capacitor C4.
A signal of frequency 4 is sent to 14. The seal is a terminal ringer, and has a die-sealed ring. A DC voltage is supplied to the oscillation circuit D through D. In addition, - and heto constitute a block filter. Since this oscillation circuit is supplied with a permanent DC voltage, it oscillates at a frequency f determined by the conductor t-Q, CF, and inductance L4, and is connected to the power supply terminal 6 by the coupling filter L4 and the coupling conductor tc@. ．． A book that sends out a signal' with frequency f from s'.

! is the receiver. Reference numeral 8 denotes a switch for switching between night and night, and the state shown in FIG. 8 is the night switch position. Inductance L.

Block fill with Condan TCA! -I need a configuration. Next, the impedance composed of the inductance L- and C1o is configured to resonate at the frequency f3, and the signal of the frequency f is connected to the coupling coil ~-, the coupling capacitor C, the integrated diode DI, and the capacitor C14. Detect and compare - Input to 〇〇MK. This comparator C0M1
When there is always a signal with ti frequency f, the potential of the (+) terminal is higher than the potential of the (→ terminal, so the output is qH level, and relay R1 is in a non-conductive state. If the signal of f is not applied due to a disconnection, etc., the potential of the (→ terminal of comparator COM) becomes high, the output is inverted and reaches Lv level, and operates with relay 6, which closes the contact Jm of this relay. .Also, the impedance is composed of an inductance thread and a conductor + CU at the frequency t1
When a signal with frequency i1 arrives, it is detected by diode D1 and capacitor CII and input to comparator COM, and the output of comparator COM is inverted from H level to L level, and the relay is activated. The output contact R- of [phase] changes from the N-circuit state to the closed-circuit state. 9 is a short circuit detection circuit.

When the 2nd wire j1 a IN is normal, by setting the resistance value so that the transistor does not conduct due to the voltage drop caused by the current flowing through the resistor R1, the transistor 71 T is in a conductive state under normal conditions. , Tofunnus I"4.
%, T4 is a non-conductive viper. However, 2 lines 11.6
When short-circuited, the voltage across resistor 8 rises, transistor JT4 becomes conductive, and transistor JT4 becomes conductive.

sT4 becomes conductive. Therefore, the transistor T3 becomes non-conducting to protect the power source E, and the relay operates to close the contact R-. Note that the number of detectors j) is limited to one, but multiple Ik<, l', l# may be provided, and if both detectors 5' and 5' output signals with frequency fl, In the detector, if any of the detectors is activated, it is detected and displayed by the receiver.In addition, the oscillation frequencies of detectors 1, I', and I" are respectively fl and
f′! ,, f(), the receiver is also provided with a resonant circuit that resonates at 7, 1 m, 1 a, and 1 a, respectively, and a detection circuit is installed after the resonant circuit. Comparator CoM!, CO
If configured to add to M@', C0M4r,
It is also possible to identify which detectors have been activated.

Note that when the changeover switch 8 is switched to the terminals a and a', the polarities of the voltages at the terminals 4, 4', Is, and 5' are reversed. However, since the terminal oscillator device is connected through diode bridges B and D, even if the polarity is reversed, the oscillator $7
continues to operate. However, since the detector has a die hole, no DC voltage is supplied to the detection hole. In other words, the physical quantity is measured without activating the detector.
It is configured to monitor for disconnections and short circuits.

Then, put the C switch 8 in the position shown in figure $.

In other words, it is a nighttime warning and monitoring state. At this time, 2 lines'
If b * jl is normal, DC voltage go is supplied from terminal 6.6' to the end and end oscillation onomatopoeia, oscillation output of frequency f snow is output from oscillation circuit 11, and coupled coil/I/L4$ p
and through coupling capacitor C8, 2 lines 11 @ 41
to terminal 6.6' of the receiver, and connect the inductor to terminal 6.6' of the receiver.
Since the resonant circuit consisting of the I input and the capacitor + C is configured to resonate with the signal of frequency f, the output of the comparator COM becomes H level, and the relay [phase] becomes inactive. maintain.

Since the detection delamination is also supplied with a DC voltage at the terminal 4.4', the sensor 1 is in a waiting state.

When there is a detection output from this sensor 1 and the contact 2 changes from a closed circuit to a circuit state, the base potential of the transistor J T10 becomes high level and the oscillation circuit 8 is activated, and a signal with an oscillation frequency of 1k Is is transmitted to the snow line '11 It is input to the reception 1111 via the coupling coil L1 and the coupling condenser? Comparator COM
The output of , is reversed from ■ level to L level, and relay [
phase] is activated, contact R and tortoise of relay [with] are closed, and '
Displays that the detector tube is activated.

In addition, if the 2 wires JLA & are short-circuited, a strangely large current will occur in the normal state! l flows, and the voltage across resistor R1 (R1・Il
) is a big sho, transis! - becomes conductive, transistor l-01 operates, and transistor T
1 is in the OFF state. Therefore, short circuit current! 1 no longer flows, the relay [phase] is activated, and the contact R3 of the relay [co., Ltd.] is closed.

Next, when the switch 8 is switched from the state shown in FIG. 8 to the 3,1' side, the two bundles 11. The polarity of the DC voltage at h is reversed, and in the terminal oscillation onomatopoeia, terminal 6' becomes the (positive) pole, and terminal 6 becomes (.@
) Become a pole. Further, in the detection delamination, the terminal 4' of C becomes the (positive) Wi, and the terminal 4 becomes the (negative) electrode. At the end of the transmitter tube, the diode preamp! Rounding where /B and D exist,
A voltage is always applied to the oscillation circuit 7. However, in the detection delamination, a DC voltage is applied through the diode DI, so when the terminal 4' becomes (positive) I[, no DC voltage is applied to the oscillation circuit section. Note that the sensor part l may be a light beam detector, an ultrasonic warning device, or a radio wave warning device.

As mentioned above, according to the present invention, a power supply section, a signal detection circuit that detects a signal of a predetermined frequency, a short circuit detection circuit that operates when power above a predetermined level is supplied from the power supply section, and a polarity of the power supply section. Receiver including a changeover switch to change the! and,
comprising a sensor circuit section and an oscillation circuit section that outputs a signal of a predetermined frequency that is activated by the output of the sensor circuit section,
The sensing part includes a power terminal connected to the sensor part via a rectifier, and a terminal oscillator i which is supplied with voltage from the power terminal via a diode bridge and oscillates a signal at a predetermined frequency, The receiver 1 and the detector head are connected by two wires, and the terminal oscillation layer is connected to the rear stage of the first detector 1, and the oscillation output of the terminal oscillator ring and the detector are coupled. Said through the coil! 2-wire crime prevention surveillance w1 diagram superimposed on the line and 9, so detector 1 and receiver! Connect with two wires, and use these two wires to supply voltage and
In addition to transmitting signals, disconnection of these two wires can be detected by the presence or absence of a signal from the terminal transmitter, and short circuits can also be detected. Setting the open/close detection switch for windows and doors to the standby state would make things more complicated, so the detector should be turned off and set to the standby state at night by simply switching the switch 8. In addition, since disconnection and short circuit detection is required as a warning sign, two wires and one wire are required.
Even if the 1 MB is disconnected and the 9 is short-circuited, it can respond immediately and has extremely large electrodynamics, such as not interfering with night vigilance.

[Brief explanation of the drawing]

The drawings are diagrams for explaining the present invention, and FIGS. 1 and 2 are electrical circuit diagrams showing a conventional example. FIG. 8 is an electrical circuit diagram showing one embodiment of the present invention. 1: Receiver, I: Detector, ■=Terminal transmitter, 11.6:
Connect receiver l and detector ■, Ik 8 wire, C0M1゜C0
M1: Comparator, R1# "l # R1' relay, 1:
Sensor, 2: Output contact of sensor 1, 8, 7: Oscillation circuit. Patent applicant Matsushita Electric Works Co., Ltd. Attorney Toshimaru Takemoto (and 2 others)

Claims (1)

[Claims] +1> A power supply unit, a signal detection circuit that detects a signal of a predetermined frequency, a short-circuit detection circuit that operates when power exceeding a predetermined value is supplied from the power supply unit, and a changeover switch that changes the sideness of the power supply unit. an oscillating IM circuit that outputs a signal of a predetermined frequency operated by the sensor tags section and i6 of the sensor circuit section, and a power supply terminal connected to the sensor section via a rectifier. 1111 summer toyosho na seconds, the receiver 1 and the detector 1 to which a voltage is supplied from the power terminal through the diode prefushi and emit a signal of a predetermined frequency; When connected with three wires; [, the terminal source 1 [
1111, and the output of the terminal transmitter and the detection layer are superimposed on the two-band IC via a coupling coil.