CN102426737A

CN102426737A - Four-path wired monitoring device

Info

Publication number: CN102426737A
Application number: CN2011103643432A
Authority: CN
Inventors: 何林
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-11-17
Filing date: 2011-11-17
Publication date: 2012-04-25

Abstract

The invention relates to a four-path wired monitoring device. The four-path wired monitoring device comprises a DC power supply, four monitoring probes, a bridge balance circuit, a DC amplifying circuit, a potential locking circuit and a visual and aural alarm circuit, wherein the bridge balance circuit comprises two silicon transistors, four balance arms of the bridge circuit are replaced by the four monitoring probes, and a microswitch in each probe is respectively connected with one resistor in series to form one balance arm. Once certain monitoring probe is triggered or an arranged defense line is short-circuited or cut or acted likewise, the monitoring device gives a visual and aural alarm. The circuit is provided with a memory function. Once the alarm signal is sounded, the bridge balance circuit status is instantly broken, the potential locking circuit automatically maintains the working status of the circuit, and uninvited guests entering the defended region can not stop the alarm signal freely.

Description

4 road wired monitoring devices

Technical field

The invention belongs to electronics, safety monitoring technical field, relate to a kind of 4 road wired monitoring devices.

Monitoring alarm device kind on the market is a lot, and the mode of obtaining alert mainly contains: the one, and the alarm that the maximum infrared sensor of market share is made for probe (adding Fresnel Lenses with the pyroelectric effect device); The 2nd, with vehicle-mounted representative, the alarm made from against shock, tamper evident, noiseproof vibration displacement sensor; The 3rd, the alarm made from touch, inductive probe, microwave probe on a small quantity etc.Though dominance and positive role that these alarms are taken precautions against in a lot of fields are undoubted, also there are some problems in actual use really in they.

Some finished product supervising device or facility exist certain defective on the market, and the present invention can solve or remedy some shortcoming that all kinds of on the market supervising devices exist and price to design than problem such as height.

Summary of the invention

Goal of the invention: the present invention is used to survey the regional a kind of supervising device that human body gets into or whether the object of setting up defences is moved that whether has of setting up defences, and major function has: monitor mode is versatile and flexible, does not receive effects limit such as guarded region size or article character; When having alert to take place, the sound of supervising device, light actuation of an alarm are clear-cut, agile; When having alert to take place, circuit is the lock-in circuit duty voluntarily, remove the alarm condition of supervising device, must take corresponding measure by the monitor staff; Wrong report and the dangerous alert that solves no substantive dangerous situation such as fails to report at problem; 4 road monitor channels can use simultaneously, also can use the part monitor channel as required.

Beneficial effect: with 4 road wired monitoring devices of silicon transistor composition bridge balance circuit production, this technical scheme has been simplified circuit structure, has reduced the manufacture difficulty and the cost of device, and has realized that monitoring sensitivity is high, the requirement of reliable working performance.

Every road monitor channel all has tamper-proof function; In case run into that certain road monitoring probe is touched or the burglar has found the cloth defence line and implement short circuit or be sheared to wait when moving; Supervising device is reported alert news with meeting sound, light mode immediately; Alarm signal will be kept once the lock-in circuit that sounds automatically, and the uninvited guest can't remove alert news voluntarily in the zone of setting up defences, and alert news is removed or withdrawn a garrison and must be carried out by the monitor staff.

Monitoring probe good concealment.Because of probe is not the probe of real meaning, probe size may diminish to be ignored, so probe is hidden installation easily and is difficult to realized, makes the burglar can't hide the monitoring of probe.

Basically stop wrong report and phenomenon such as fail to report, only unsafe factor is taking place really, comprise and illegally just can report to the police when getting into roughly, can also can not fail to report because of the wrong report of thundering, blowing out, phenomenon such as vibrations not having substantive alert because of technical crime.Set up defences against setting up defences through multilevel monitor and wait the combination protection, can further eliminate and monitor the dead band with emphasis.Supervising device is designed with self check, emergency function, can the system monitoring device performance normally whether.

Technical characterictic: 4 road wired monitoring devices, to form by direct supply, 4 tunnel monitoring probes, dc amplification circuit, current potential lock-in circuit and acousto-optic warning circuit, its characteristic comprises:

Form the bridge balance circuit with 2 silicon transistors, 4 balance arms in the bridge balance circuit replace with 4 road wired monitorings probe;

4 tunnel monitoring probes: 4 arms that replace the bridge balance circuit with 4 tunnel monitoring probes; Every road monitoring probe is made up of 1 resistance of 1 microswitch serial connection, and 4 tunnel monitoring probes of bridge balance circuit are respectively that the 1 tunnel monitoring probe is made up of microswitch K1 and resistance R 1; The 2 tunnel monitoring probe is made up of microswitch K2 and resistance R 2; The 3 tunnel monitoring probe is made up of microswitch K3 and resistance R 3; The 4 tunnel monitoring probe is made up of microswitch K4 and resistance R 4;

Bridge balance circuit: constitute by 2 NPN transistor BG1, BG2 and 4 tunnel monitoring probes; The end of the collector connecting resistance R6 of 2 NPN transistor BG1, BG2; The anodal VCC of another termination direct supply of resistance R 6; The end of the base stage connecting resistance R7 of NPN transistor BG1; One end of the emitter of another termination NPN transistor BG2 of resistance R 7 and the 3 tunnel monitoring probe and the 4 tunnel is monitored an end of probe, meets the anodal VCC of direct supply behind the other end series resistor R8 of the 3 tunnel monitoring probe, the other end connection circuit ground GND that the 4 tunnel monitoring is popped one's head in; The end of the base stage connecting resistance R5 of NPN transistor BG2; One end of the emitter of another termination NPN transistor BG1 of resistance R 5 and the 1 tunnel monitoring probe, the 2 tunnel is monitored an end of probe, meets the anodal VCC of direct supply behind the other end serial connection potentiometer RP of the 1 tunnel monitoring probe, and the 2 the tunnel monitors the other end connection circuit ground GND of probe;

Dc amplification circuit and acousto-optic warning circuit: PNP transistor BG3, red light emitting diodes D2, resistance R 9 and hummer Y, silicon diode D3 form; The base stage of PNP transistor BG3 connects the collector of 2 NPN transistor BG1, BG2; The emitter of PNP transistor BG3 meets the anodal VCC of direct supply; The collector of PNP transistor BG3 connects the positive pole of germanium diode D1, an end of resistance R 9 and the positive pole of silicon diode D3, the positive pole of another termination red light emitting diodes D2 of resistance R 9, the negative pole connection circuit ground GND of red light emitting diodes D2; The negative pole of silicon diode D3 connects the positive pole of hummer Y, the negative pole connection circuit ground GND of hummer Y;

The current potential lock-in circuit: be responsible for the lock-in circuit duty by germanium diode D1, the positive pole of germanium diode D1 connects the collector of PNP transistor BG3 and the positive pole of silicon diode D3, and the negative pole of germanium diode D1 connects the base stage of NPN transistor BG2.

The circuit working principle: 4 microswitch K1 in the circuit working schematic diagram, K2, K3, K4 contact are in normally off (the object situation also can be located at normally open with the contact according to setting up defences) and form bridge diagram with the resistance of 4 arms of bridge balance circuit, and the dotted line that connects 4 tunnel monitoring probes in the circuit theory diagrams is the cloth defence line.

In 4 road monitor channels; When 4 tunnel monitoring probes all are in monitor state; The current potential that a in the circuit, b are 2 equates, the base stage of NPN transistor BG1 and NPN transistor BG2, the current potential of emitter are equal, and bridge diagram is in equilibrium state; PNP transistor BG3 is in cut-off state, and at this moment 4 tunnel monitoring probes all are in the warning armed state.

With the 2 road monitor channel is example: as microswitch K2 when suddenly open circuit or cloth defence line are artificially cut off; The equilibrium state of bridge diagram is broken; A point current potential is higher than the current potential that b is ordered so, and NPN transistor BG2 obtains normal bias voltage and conducting, and PNP transistor BG3 passes through because of electric current is arranged; Then PNP transistor BG3 will become conducting by ending, and germanium diode D1 is by making the base stage of NPN transistor BG2 remain noble potential by becoming conducting.At this moment, even the microswitch K2 contact in the 2 tunnel monitoring probe recloses or the cloth defence line is resumed original state, PNP transistor BG3 also will continue to keep conducting state (keeping memory), make light emitting diode D2 and hummer Y remain work.

When the 2 road monitor channel cloth defence line is short circuit by the people; A point current potential is 0V; NPN transistor BG1 has forward bias and conducting, and the conducting of same germanium diode D1 makes PNP transistor BG3 base stage remain noble potential, and PNP transistor BG3 also continues to keep conducting state.

In like manner, the probe principle of work of the monitoring in the 1st, 3,4 road monitor channels and the course of work are the same.

In case run into that a certain road monitoring probe is touched or the cloth defence line by short circuit or be sheared and wait when moving; Supervising device is reported alert news with sound, light mode immediately, and alarm signal is once sounding, and lock-in circuit will be kept automatically; Entering set up defences the zone in the uninvited guest can't remove alert news voluntarily; Alert news is removed or is withdrawn a garrison and must be cut off the direct supply of supervising device by the monitor staff, connects the direct supply of supervising device once more, and circuit just can return to initial equilibrium conditions (the circuit balancing state resets).

Germanium diode D1 is that the lock-in circuit duty is established, and light emitting diode D2 is an alarm lamp, and silicon diode D3 is a signal output isolating diode, and silicon diode D3 effect is an operate as normal of disturbing previous circuit for blocking-up.

Description of drawings

Accompanying drawing 1 is the circuit working schematic diagram of 4 road wired monitoring devices; The dotted line that in accompanying drawing 1, connects 4 tunnel monitoring probes is the cloth defence line.

Embodiment

Accompanying drawing 1 and description of drawings to specifications below, in conjunction with following examples to correlation technique of the present invention with make main points and do further to describe.

The selection of components and parts and making

1. components and parts select the considered supervising device must adapt to the long-term uninterrupted requirement of using, and are principle so make every effort to working stability, reliable operation, the wide and resistant to elevated temperatures components and parts of screening thermal adaptability;

2. component parameters is seen components and parts title and technical parameter table

The components and parts mark	The components and parts title	Major parameter	Quantity	Remarks
					BG1、BG2	NPN transistor, 2SC9013	The T0-92 plastic packaging	2	Or 3DG6
BG3	PNP transistor, 3AX31	Or 3AX81	1	Homemade model
					D1	Germanium diode, 2AP9	Glass-encapsulated	1	Or 1N60
D2	Red light emitting diodes	LEDΦ5	1	Report to the police and indicate
					D3	Silicon diode, 1N4148	Glassivation	1	Or 1N4001
RP	Potentiometer	1.5K?Ω	1	Fine setting
					K1、K2、K3、K4	Switch (probe segment)	Microswitch, tongue tube etc.	4	Probe
R1、R2、R3、R4	Resistance	1/16W?1KΩ	4	1206 pasters
					R8	Resistance	1/8W?1K?Ω	1
R6	Resistance	1/8W?4.7K?Ω	1
					R5、R7	Resistance	1/8W?6.8K?Ω	2
R9	Resistance	1/8W?180Ω	1
					Y	Hummer (including electronic circuit)	Φ 10, voltage: 3～5V	1	Solderable

3. the making of monitoring probe.The making of monitoring probe is an important link; For strengthening the hidden effect of monitoring probe; Microswitch during 4 monitoring are popped one's head in will be an one with 4 resistance R 1, R2, R3, R4 combination sealing respectively; Resistance during particularly each road monitoring is popped one's head in will be noted hidden, preferably selects the 1/16W metalfilmresistor that stability is better, volume is less for use or selects 1206 type Chip-Rs for use.

Circuit debugging

1. the key point of circuit debugging is the balance of adjustment bridge diagram.When power supply voltage was 6V, adjustment trimmer potentiometer RP made a point voltage-to-ground in the circuit equal the voltage-to-ground that b is ordered, that is: Va=Vb=1.9～2.0V.During respectively with resistance R 1, R2, R3, R4 short circuit or open circuit, the negative pole of silicon diode D3 all can obtain the output voltage of 4.6～4.9V to circuit ground, and at this moment hummer Y gets electric ringing, and red light emitting diodes D2 is also because of must electric being lighted.4 road monitor channels should have same action reflection respectively;

2. when power supply was 6V, the complete machine quiescent current was 3.0～4.2mA; Working current is 39mA during the supervising device alarm;

3. tracking: supervising device is connected cloth defence line and monitoring probe, make supervising device under different electrical power voltage, artificially simulate various alerts, each road prison of complete machine is visited passage carry out combined debugging.

Technical indicator

1. WV: 4.5～7.5V (direct supply); Built-in power: 4 joint 7# alkaline batteries;

2. quiescent current: static working current 4.0～4.6mA, device alarm working current 36mA (recording during for 6V) at power supply;

3. monitor channel: 4 tunnel;

4. monitoring distance: >=400m (the cloth defence line that the selection wire footpath is thicker, the monitoring distance can increase considerably).

Method of application

1. according to the character of fence coverage and protection object, confirm to monitor probe and select for use microswitch also to be to use magnetic switch as the monitoring probe.

2. at the suitable position of zone or valuables of setting up defences, the hidden monitoring probe that places has been laid cable, opens the connection direct supply on the supervising device at last.

Claims

1.4 road wired monitoring device is made up of direct supply, 4 tunnel monitoring probes, bridge balance circuit, dc amplification circuit, current potential lock-in circuit and acousto-optic warning circuit, its characteristic comprises:

Every road monitoring probe in 4 tunnel monitoring probes is made up of 1 resistance of 1 microswitch serial connection, and 4 tunnel monitoring probes of bridge balance circuit are respectively that the 1 tunnel monitoring probe is made up of microswitch K1 and resistance R 1; The 2 tunnel monitoring probe is made up of microswitch K2 and resistance R 2; The 3 tunnel monitoring probe is made up of microswitch K3 and resistance R 3; The 4 tunnel monitoring probe is made up of microswitch K4 and resistance R 4, and 2 silicon transistors are formed the bridge balance circuit, and 4 balance arms in the bridge balance circuit replace with 4 road wired monitorings probe;

The bridge balance circuit is made up of 2 NPN transistor BG1, BG2 and 4 tunnel monitoring probes; The end of the collector connecting resistance R6 of 2 NPN transistor BG1, BG2; The anodal VCC of another termination direct supply of resistance R 6; The end of the base stage connecting resistance R7 of NPN transistor BG1; One end of the emitter of another termination NPN transistor BG2 of resistance R 7 and the 3 tunnel monitoring probe and the 4 tunnel is monitored an end of probe, meets the anodal VCC of direct supply behind the other end series resistor R8 of the 3 tunnel monitoring probe, the other end connection circuit ground GND that the 4 tunnel monitoring is popped one's head in; The end of the base stage connecting resistance R5 of NPN transistor BG2; One end of the emitter of another termination NPN transistor BG1 of resistance R 5 and the 1 tunnel monitoring probe, the 2 tunnel is monitored an end of probe, meets the anodal VCC of direct supply behind the other end serial connection potentiometer RP of the 1 tunnel monitoring probe, and the 2 the tunnel monitors the other end connection circuit ground GND of probe;

Dc amplification circuit and acousto-optic warning circuit are made up of PNP transistor BG3, red light emitting diodes D2, resistance R 9 and hummer Y, silicon diode D3; The base stage of PNP transistor BG3 connects the collector of 2 NPN transistor BG1, BG2; The emitter of PNP transistor BG3 meets the anodal VCC of direct supply; The collector of PNP transistor BG3 connects the positive pole of germanium diode D1, an end of resistance R 9 and the positive pole of silicon diode D3, the positive pole of another termination red light emitting diodes D2 of resistance R 9, the negative pole connection circuit ground GND of red light emitting diodes D2; The negative pole of silicon diode D3 connects the positive pole of hummer Y, the negative pole connection circuit ground GND of hummer Y;

The current potential lock-in circuit is responsible for the lock-in circuit duty by germanium diode D1, and the positive pole of germanium diode D1 connects the collector of PNP transistor BG3 and the positive pole of silicon diode D3, and the negative pole of germanium diode D1 connects the base stage of NPN transistor BG2.