CN202026380U

CN202026380U - Remote monitoring device of fixed-line telephone

Info

Publication number: CN202026380U
Application number: CN2011200777661U
Authority: CN
Inventors: 朱虹
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-03-23
Filing date: 2011-03-23
Publication date: 2011-11-02
Anticipated expiration: 2021-03-23

Abstract

The utility model belongs to the field of electronic technology and communication technology, and relates to a remote monitoring device of a fixed-line telephone. The device comprises a fixed-line telephone set, an electret capacitor microphone, a double-pole double-throw switch, a 12V direct current power source, a single-direction controllable silicon control and trigger circuit, and a time-delay and control circuit, and is characterized in that the load of a single-direction controllable silicon VS in the single-direction controllable silicon control and trigger circuit is a relay K1, a trigger circuit is connected with the ringing signal output end of the fixed-line telephone set via a germanium diode D1, the integrated circuit in the time-delay and control circuit employs an NE555 time-base circuit, and a control element employs a direct current relay K2. Monitoring telephone sets with a plurality of functions are on the market, but the novel telephone sets are so expensive that general wage earners cannot afford. With the device, when nobody is at home, everything happened at home can be monitored immediately as soon as the fixed-line telephone is dialed. The device is simple in circuit structure and low in manufacturing cost, and is suitable for batch development.

Description

Landline telephone remote monitoring device

Technical field

The utility model belongs to electronic technology and communication technique field, relates to a kind of landline telephone remote monitoring device.

Background technology

Telephone set miscellaneous emerges in an endless stream on the market, and remote videophone, Automatic alarm telephone are arranged, the phone that can surf the web ... but these novel phones cost an arm and a leg, and general wage-earners are difficult to bear.

If the family telephone set is loaded onto this device described in the utility model, just can realize the function of landline telephone remote monitoring.Marquis when unmanned in you are away from home house, if worried to the safety of family, as long as you dial the landline telephone in the family, all sounds of movement take place and could listen to immediately in family, can remove your trouble and worry!

It is simple that this device has a circuit, all uses common components and parts, and cost of manufacture only needs tens yuan, is well suited for exploitation in batches, also is suitable for developing the novel telephone set of the function with remote monitoring.

Through the test of multiple scheme, relatively and analyze, the utility model only uses a small amount of common discrete component, has realized that circuit structure is simple, cost is low, designing requirement such as effective, reliable working performance.

Below describe related relevant technologies in this landline telephone remote monitoring device making in detail.

The utility model content

Goal of the invention and beneficial effect: monitoring, the monitoring phone machine of multiple function are arranged on the market, but these novel phones cost an arm and a leg, general wage-earners are difficult to bear.This telephone monitoring device described in the utility model has been realized the function of landline telephone remote monitoring.Marquis when unmanned in you are away from home house, as long as you dial the landline telephone in the family, all sounds of movement take place and could listen to immediately in family, can remove your trouble and worry! It is simple that this device has a circuit, all uses common components and parts, and cost of manufacture is low, is well suited for exploitation in batches, also is suitable for developing the novel telephone set with remote monitoring function.

Technical characterictic: landline telephone remote monitoring device is made up of fixed telephone, electret capacitor microphone, double-point double-throw switch S, 12V DC power supply, one-way SCR control and circuits for triggering, time-delay and control circuit, it is characterized in that: the load of one-way SCR VS is direct current relay K1 in one-way SCR control and the circuits for triggering thereof, circuits for triggering are ends that connect the output of fixed telephone bell signal by germanium diode D1, integrated circuit in time-delay and the control circuit is selected NE555 time-base circuit (IC1) for use, and control element uses direct current relay K2.

Annexation in each several part circuit composition and the circuit between the components and parts

The output of electret capacitor microphone respectively and connect with the landline telephone cleaner handgrip in microphone cord.

Public pin among the double-point double-throw switch S1-1 is COM1, public pin COM1 connects fixed contact among the direct current relay K1 normally opened contact K1-1 and the fixed contact among the direct current relay K2 normally-closed contact K2-1, other 2 pin among the double-point double-throw switch S1-1 are respectively OFF1 end and ON1 end, the positive pole of ON1 termination 12V DC power supply; Public pin COM2 among the double-point double-throw switch S1-2 connects the end of loud speaker BL, other 2 pin are respectively OFF2 end and ON2 end among the double-point double-throw switch S1-2, the other end of loud speaker BL answer the call an end and the circuit ground GND of power ringing output, another termination OFF2 of ringing telephone stations output hold and the positive pole of germanium diode D1.

One-way SCR control and circuits for triggering thereof: the negative pole order of germanium diode D1 is to the control utmost point of controllable silicon VS, the anode of one-way SCR VS connects an end of direct current relay K1 coil, the moving contact of another termination direct current relay K2 normally-closed contact K2-1 of direct current relay K1 coil, the negative electrode connection circuit ground GND of one-way SCR VS.

Time-delay and control circuit: by NE555 time-base circuit (IC1), timing capacitor C1, potentiometer RP1, capacitor C 2, direct current relay K2, silicon rectifier diode D2 forms, 2 pin of NE555 time-base circuit (IC1) and 6 pin are with the negative pole that meets timing capacitor C1, the end of potentiometer RP1,1 pin of the intermediate active arm of the other end of potentiometer RP1 and potentiometer RP1 and NE555 time-base circuit (IC1) is with connection circuit ground GND, 4 pin of the positive pole of timing capacitor C1 and NE555 time-base circuit (IC1) and 8 pin are with the anodal VCC of connection circuit, 5 pin of NE555 time-base circuit (IC1) connect crosstalk and hold connection circuit ground GND behind the C2,3 pin of NE555 time-base circuit (IC1) are with connecing an end of direct current relay K2 coil and the negative pole of rectifier diode D2, the other end of direct current relay K2 coil, the positive pole of rectifier diode D2 links to each other with circuit ground GND; Circuit anode VCC connects the moving contact among the direct current relay K1 normally opened contact K1-2, and the fixed contact among the normally opened contact K1-2 meets the public pin COM1 among the double-point double-throw switch S1-1.

Circuit working principle and using method: behind the landline telephone in putting through house, bell signal is through germanium diode D1 rectification, trigger one-way SCR VS conducting, make direct current relay K1 get electric work, normally opened contact K1-1 closure in the relay K 1, telephone set are by off-hook, and electret capacitor microphone MIC starts working, various sound of movement sound during you just can listen and get home, normally opened contact K1-2 is also closed among the direct current relay K1 simultaneously, and the delay circuit of being made up of NE555 gets electric work, and this moment, 3 pin of NE555 were exported electronegative potential, direct current relay K2 keeps release, through the time-delay of a few minutes, 3 pin of NE555 output high potential, direct current relay K2 gets electric work, its normally-closed contact K2-1 is disconnected, the direct current relay K1 release of cutting off the power supply, its normally opened contact K1-1 disconnects, the telephone set on-hook, the normally opened contact K1-2 of direct current K1 disconnects, cause the delay circuit outage again, direct current relay K2 outage is released its normally-closed contact K2-1 adhesive, entire circuit resets, and the wait outside line is dialled next time.

When double-point double-throw switch placed " OFF " position, S1-1 disconnected the 12V DC power supply, and S1-2 connects the loud speaker in the telephone set simultaneously, does not influence the normal use of telephone set.

When double-point double-throw switch places " ON " position, S1-1 connects the 12V DC power supply, and circuit must be established beginning work by cable, and LED 1 is lighted, and disconnects loud speaker BL in the telephone set by S1-2 simultaneously.

Description of drawings

Accompanying drawing is the circuit working schematic diagram of the embodiment of landline telephone remote monitoring device that provides of the utility model.

Being combined by 2 groups of single-pole double-throw switch (SPDT)s for double-point double-throw switch in the accompanying drawing, that is: S1-1, S1-2 are used for the break-make of external 12V DC power supply of Synchronization Control and boombox.

Normally opened contact K1-1 among the direct current relay K1 in the accompanying drawing in the telephone set directly is attempted by on two contacts of telephone hook switch.

Loud speaker BL in the accompanying drawing is the original boombox of telephone set.

Embodiment

Specification requirement according to the components and parts of the circuit working schematic diagram of landline telephone remote monitoring device shown in the drawings and description of drawings and the following stated is implemented, and can realize the utility model.

The selection of components and parts and technical parameter thereof

IC1 is a time-base integrated circuit, and proposed model is NE555;

VS is an one-way SCR, the optional MCR100-6 of model;

D1 is a rectifier diode, be to reduce the pressure drop that produces because of rectification, should select the germanium diode of model such as 2AP10;

Diode D2 is that protective circuit is established, and can select the rectifier diode of silicon materials for use, as: 1N4001;

LED1 is a light-emitting diode, is used for the off hook state indication;

MIC is a microphone, should select the electret capacitor microphone of two lead-out terminals for use;

The resistance of resistance R 1 is 1.8K Ω, and the resistance of potentiometer RP1 is 2.2M Ω;

C1 is an electrochemical capacitor, and its capacity is 220 μ F, and C2 is that its capacity of ordinary polyester is 0.01 μ F;

Direct current relay K1 uses 2 groups of normally opened contact K1-1, K1-2, and model is JRXB-1;

Direct current relay K2 uses 1 group of normally-closed contact, and model is HG4098;

Double-point double-throw switch is combined by 2 groups of synchronous single-pole double-throw switch (SPDT)s, that is: S1-1, S1-2 are used for the break-make of external 12V DC power supply of Synchronization Control and boombox;

The 12V DC power supply can be selected the 12V stabilized voltage power supply for use, also can select common 12V rectifier power source for use.

Manufacture method: the circuit board of landline telephone remote monitoring device is less because of volume, can directly be fixed on the inside of telephone set.A ￠ 3mm aperture is bored in appropriate location in telephone set front or side, an electret capacitor microphone MIC inside is installed, its 2 lead-in wires are directly in parallel with the microphone cord in the Telephone handset, the normally opened contact K1-1 of direct current relay K1 is connected in parallel on 2 contacts of hook switch of telephone set, 1 double-point double-throw switch is installed in the telephone set side, is used for the through and off of external 12V DC power supply of Synchronization Control and boombox.

Circuit debugging: when making the circuit of landline telephone remote monitoring device, as long as the electronic devices and components performance of selecting for use is intact, and the components and parts annexation in the accompanying drawing is welded to specifications, after physical connection line and welding quality process scrutiny are correct, but circuit does not need just operate as normal of debugging substantially.

If need prolong the listening period after each dialing, can increase the resistance of potentiometer RP1 by adjustment, or suitably increase the capacity of electrochemical capacitor C1.

Claims

1. landline telephone remote monitoring device, form by fixed telephone, electret capacitor microphone, double-point double-throw switch, 12V DC power supply, one-way SCR control and circuits for triggering, time-delay and control circuit, it is characterized in that: the load of one-way SCR VS is direct current relay K1 in one-way SCR control and the circuits for triggering thereof, circuits for triggering are ends that connect the output of fixed telephone bell signal by germanium diode D1, integrated circuit in time-delay and the control circuit is selected NE555 time-base circuit (IC1) for use, and control element uses direct current relay K2.

2. landline telephone remote monitoring device according to claim 1, the output that it is characterized in that the electret capacitor microphone respectively and connect with the landline telephone cleaner handgrip in microphone cord.

3. landline telephone remote monitoring device according to claim 1, it is characterized in that: the public pin among the double-point double-throw switch S1-1 is COM1, public pin COM1 connects fixed contact among the direct current relay K1 normally opened contact K1-1 and the fixed contact among the direct current relay K2 normally-closed contact K2-1, other 2 pin are respectively OFF1 end and ON1 end among the double-point double-throw switch S1-1, the positive pole of ON1 termination 12V DC power supply; Public pin COM2 among the double-point double-throw switch S1-2 connects the end of loud speaker BL, other 2 pin are respectively OFF2 end and ON2 end among the double-point double-throw switch S1-2, the other end of loud speaker BL answer the call an end and the circuit ground GND of power ringing output, another termination OFF2 of ringing telephone stations output hold and the positive pole of germanium diode D1.

4. landline telephone remote monitoring device according to claim 1, the feature of one-way SCR control and circuits for triggering thereof is: the negative pole order of germanium diode D1 is to the control utmost point of controllable silicon VS, the anode of one-way SCR VS connects an end of direct current relay K1 coil, the moving contact of another termination direct current relay K2 normally-closed contact K2-1 of direct current relay K1 coil, the negative electrode connection circuit ground GND of one-way SCR VS.

5. landline telephone remote monitoring device according to claim 1, time-delay and control circuit are by NE555 time-base circuit (IC1), timing capacitor C1, potentiometer RP1, capacitor C 2, direct current relay K2, silicon rectifier diode D2 forms, it is characterized in that: 2 pin of NE555 time-base circuit (IC1) and 6 pin are with the negative pole that meets timing capacitor C1, the end of potentiometer RP1,1 pin of the intermediate active arm of the other end of potentiometer RP1 and potentiometer RP1 and NE555 time-base circuit (IC1) is with connection circuit ground GND, the anodal VCC of 4 pin of the positive pole of timing capacitor C1 and NE555 time-base circuit (IC1) and 8 pin connection circuits, 5 pin of NE555 time-base circuit (IC1) connect crosstalk and hold connection circuit ground GND behind the C2,3 pin of NE555 time-base circuit (IC1) are with connecing an end of direct current relay K2 coil and the negative pole of rectifier diode D2, the other end of direct current relay K2 coil, the positive pole of rectifier diode D2 links to each other with circuit ground GND; Circuit anode VCC connects the moving contact among the direct current relay K1 normally opened contact K1-2, and the fixed contact among the normally opened contact K1-2 meets the public pin COM1 among the double-point double-throw switch S1-1.