CN2091008U - Anti-theft alarm for electric power installation - Google Patents
Anti-theft alarm for electric power installation Download PDFInfo
- Publication number
- CN2091008U CN2091008U CN 91206760 CN91206760U CN2091008U CN 2091008 U CN2091008 U CN 2091008U CN 91206760 CN91206760 CN 91206760 CN 91206760 U CN91206760 U CN 91206760U CN 2091008 U CN2091008 U CN 2091008U
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- circuit
- extension set
- oscillating element
- main frame
- resilient contact
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Abstract
The utility model discloses an anti-theft alarm for electric power installation, which is suitable for the power installations which are connected with the low-tension power main line of 380V. An extension machine adopts the method that an oscillating element which determines carrier frequency is led out to be connected with an elastic contact in series connection, forming a sensing circuit. The extension machine is arranged on the power installation, and continuously sends out signals of carrier frequency. A host machine is provided with three circuit receiver and a circuit. The host machine receives the signals of the extension machine from the signal circuit which is formed by the power line, and meanwhile has the function of anti-theft monitoring all the phase line, the zero line, and the power installation of the main line. The utility model has the advantages of simple circuit and stable operation. Batteries are adopted as spare power in the utility model, and the power line can monitor as usual wether the power is on or off.
Description
The utility model relates to a kind of electric power facilities anti-theft device, especially forms main frame by receiving device, warning circuit, power supply, is made of the 380v low-voltage power facility burglar alarm of extension set transmitting device, Exgt Bat extension battery.
At present, the anti-theft alarm for power installation of selling on the market has two kinds, first kind of structure that comes to this wherein, and it comprises a main frame, by host power supply with alarm trigger circuit, alert acoustic-electric road, the power amplifier of polyphone are formed successively.Receiving device directly links to each other with two line of electric force that constitute signal circuit by the inner couplings circuit, an extension set is made of Exgt Bat extension battery and transmitting device, extension set and main frame are connected with on two line of electric force, the signal that the extension set transmitting device sends is coupled on the signal circuit of electric wire formation, receive for main frame, the main frame receiving device can not receive signal, and its logic output just triggers warning circuit.With two wires that main frame links to each other with extension set, a velamen cuts, and main frame just can not receive signal, sends alert sound, has reached the purpose of two wires being carried out antitheft monitoring.It is that two transmitting device external connections of extension set are received on step down side two binding posts that this alarm carries out antitheft monitoring to transformer, when transformer is stolen, electric wire and this two binding post break away from, cause the main frame warning, if the offender directly links the extension set wiring on the electric wire in advance, will lose antitheft monitoring effect to transformer.Obvious this alarm can not be guarded triple-phase line and zero line simultaneously, can not guard transformer reliably.Commercially available another kind of power equipment burglar alarm, be that Shanghai Communications University, Xi'an Electronics Factory produces, (application number 89217611.3, notification number CN2056778U) its principle of work is with above-mentioned different, it is to adopt three large value capacitors, self-contained battery is confessed direct current continuous monitoring to broken string when three phase transmission line has a power failure by three resistance respectively, in order to form DC loop, is connected to three resistance between feeder ear triple-phase line and zero line.This antitheft monitoring principle, also there is defective, if the offender adopts and connects three resistance with near quadrat method electric wire main frame, electric wire and transformer at a distance just can't be guarded, because it is unimpeded that three resistance that newly add play a part DC loop equally, even transformer is stolen, electric wire is cut, the electric capacity in the alarm can not be charged to high level yet, comparer does not overturn, and can not report to the police.So though this alarm can be guarded three phase lines to a certain extent simultaneously, zero line and transformer, unreliable.
Task of the present utility model provides a kind of anti-theft alarm for power installation, and it can guard triple-phase line, zero line, transformer or other consumers on the backbone reliably simultaneously.
For solving above-mentioned task, the solution that the utility model adopts is: on first kind of anti-theft alarm for power installation basis, the main frame receiving device is increased to n-1 loop receiving device, here n is for needing the electric wire number of monitoring simultaneously, 3≤n≤4, the output terminal of each loop receiving device, connect a gate circuit input end respectively, gate circuit is exported trigger circuit input taking alarm, as long as a wire opens circuit, this signal on electrical wire loop open circuit, this loop receiving device of coupled main frame is just exported a warning message, this warning message causes the main frame warning through gate circuit input alarm trigger circuit, thereby reaches the purpose of guarding all phase lines of backbone and zero line simultaneously.
The element of decision transmitting device center oscillation frequency in the extension set is guided to the extension set outside with lead, inter-burst connects into the closure that is under pressure, remove the resilient contact device that pressure disconnects, form sensor circuit, when resilient contact is under pressure, this element in the sensor promptly is access in and is constant with the electrical connection of primary circuit, still play a part decision extension set transmitting device center oscillation frequency, like this when equipment is stolen, no matter this sensor is by short circuit or open circuit, and the former center of extension set oscillation frequency condition is all destroyed, sends abnormal signal, cause the main frame warning, thereby reach the purpose of power equipment being carried out antitheft monitoring.
When each loop receiving device logic output of main frame is low level when receiving signal; when abnormal signal or no signal are high level; coupled gate circuit be one or; like this as long as the unusual or no signal of loop receiving device input signal; or door output just is 1, and this signal promptly is used for triggering and reports to the police.
When each loop receiving device logic output of main frame is high level when receiving signal; when being low level when abnormal signal or no signal; coupled gate circuit is one and door; like this as long as the unusual or no signal of loop receiving device input signal; it is low just exporting with door, and this signal promptly is used for triggering and reports to the police.
The oscillating element of above-mentioned extension set sensing circuit and resilient contact device can be encapsulated in the housing, as sensor.One screw is arranged at this housing top, may be screwed on the fastening bolt of power equipment, screw is communicated with a cavity down, interior dress is fixed on the resilient contact device on the insulcrete, a contact of resilient contact device is connected with an end of oscillating element, the other end of another contact and oscillating element is drawn in shell by an outlet with lead respectively, and insulcrete and oscillating element are sealed in the housing with epoxy resin or other insulating material.During use, sensor is screwed on the power equipment fastening bolt, and it is drawn the corresponding extension line with extension set of lead is connected.Resilient contact device in the housing is inserted the extension set emitter by the bolt roof pressure with oscillating element, and extension set just sends normal signal.When the offender steals power equipment, at first the sensor on this fastening bolt will be backed out, this will cause the resilient contact device to be upspring, the oscillation signal return circuit open circuit, and extension set sends abnormal signal immediately, causes the main frame warning.If there is the people to adopt the method for short circuit sensor, at this moment oscillating element is by short circuit, and the signal that the main frame transmitting device sends will depart from former normal CF signal centre frequency far away, causes the main frame warning equally.Select the oscillating element of different parameters can make the alarm carrier frequency have different center oscillation frequency, so just can accomplish that extension set generally can not exchange, thereby realize reliable antitheft monitoring power equipment.
The oscillating element of extension set sensing circuit can be a resistor or capacitor.
Also the oscillating element and the resilient contact device of extension set sensing circuit can be contained on the printed circuit board, oscillating element one end is connected with first block of copper platinum, the other end links to each other with second block of copper platinum, second block of copper platinum and the 3rd block of copper platinum constitute two contacts, there is an elastic electric conductor that is fixed on the circuit board top, two contacts, it and two contacts constitute the resilient contact devices, and sensor links to each other with extension set with welding lead on the 3rd block of copper platinum by first block of copper platinum.When being under pressure, elastic electric conductor makes two contactings, and oscillating element is connected by lead and extension set emitter, and pressure is removed, and elastic electric conductor is upspring, and two contacts disconnect, and oscillating element is connected also disconnection with extension set.Above-mentioned elastic electric conductor can be an elastic metallic reed.
Resilient contact device in the sensor can be button or knob.
Because main frame has adopted a plurality of signal circuit receiving devices and corresponding with it gate circuit in the above-mentioned solution, extension set has adopted the oscillating element that will determine emitter center oscillation frequency to guide to the outside and resilient contact device polyphone of extension set, form the method for sensor, realized guarding simultaneously all phase lines of backbone and zero line and the transformer that links to each other or other power equipments.Simple in structure, monitoring is reliable, and institute increases cost seldom.
Below in conjunction with drawings and Examples the utility model is described in further detail.
Accompanying drawing 1 is embodiment circuit theory diagrams of main frame of the present utility model.
Accompanying drawing 2 is embodiment circuit theory wiring diagrams of extension set of the present utility model.
Accompanying drawing 3 is accompanying drawing 2 embodiment sensor outer housing longitudinal diagrams.
Accompanying drawing 5 is accompanying drawing 2 embodiment sensor internal structural drawing.
Accompanying drawing 6 is scheme of installations of accompanying drawing 2 embodiment sensors.
Accompanying drawing 7 is another kind of version figure of accompanying drawing 2 embodiment sensors.
With reference to accompanying drawing 1, this is the embodiment of a main frame, and details are as follows for its principle of work: alarm trigger circuit (5), alert acoustic-electric road (6), power amplifier (7), power supply (8) all are existing circuit commonly used, and concrete line construction here no longer draws.
Main frame is provided with AN loop receiving device (1), BN loop receiving device (2), CN loop receiving device (3), coupled circuit through receiving device inside, loop is connected with zero line with corresponding phase line respectively, the carrier signal that extension set sends is coupled to BG3 through line of electric force A phase and zero line transmission by C14, C15, B4, B4, BG3, L9, C21 etc. form resonance amplifier, constitute AN loop receiving device jointly with IC1NE567 and its peripheral cell, resonance amplifier is chosen the carrier signal of corresponding frequencies, through D2, D3 amplitude limit, be fed to the IC13 pin.When extension set sent the carrier signal corresponding with it, the 8 pin logic output terminal level of IC1 were low, and extension set signals when unusual, and the 8 pin output levels of IC1 are high.As a same reason, the carrier signal that extension set sends also makes CN loop receiving device (1), and 567 the 8 pin logics output of BN loop receiving device (2) changes.The extension set signal is normal, and three loop receiving device logic output levels are low.The output of the logic of three loop receiving devices connect respectively forms by discrete component D4, D5, D6, R14 or (4) three input ends, this or door (4) output are connected with alarm trigger circuit (5) input, under the normal condition, or door output also is low, and main frame is under the monitoring state.In case a wire is arranged, for example the A phase line is cut off, or the AN loop signal is unusual, the IC18 pin signal of AN loop receiving device is uprised by low, or door (4) output uprises by low, triggers alarm trigger circuit (5), makes the alert acoustic-electric road (6) of main frame power connection, amplify through power amplifier (7), drive loudspeaker YD and send loud alert sound.Reached a main frame and guarded the purpose of three phase lines and a zero line simultaneously, if need only guard three wires, main frame need only two loop receiving devices, and principle of work is with above-mentioned.
5,6 pin institute connecting resistances of this example extension set IC2 567 and main frame 567, capacitance is the same, and the main frame receiving trap can be deciphered the extension set signal.Can make each alarm have different center oscillation frequency by the parameter of adjusting these two elements.So in general extension set and main frame are supporting, extension set can not be changed arbitrarily.The present embodiment carrier frequency can be selected between 100KHZ～500KHZ.
Above-mentioned extension set embodiment is one of element of decision emitter carrier wave center oscillation frequency, and resistance R c draws extension set and resilient contact device (12) AN1 and forms sensing circuit.Also can only draw extension set to oscillating element capacitor C 8, constitute sensing circuit with resilient contact device (12) AN1.Also can Rc and C8 draw extension set and AN1 constitutes sensing circuit jointly, but at this moment extension line is many again ground wire becomes three.More than three kinds of sensors form modes, can play antitheft monitoring effect to power equipment.
With reference to accompanying drawing 3, this is the longitudinal section of accompanying drawing 2 extension set embodiment sensor outer housings (22), and accompanying drawing 4 is vertical views.Sensor outer housing (22) can be that nut type is made on top by metal or plastics manufacturing, is used for being connected with the power equipment fastening bolt of being guarded.The garden cylindrical cavity (31) of connection one and its coaxial cable below the screw (30), garden cylindrical cavity (31) diameter are a bit larger tham or equal the big footpath of screw (30), and garden post cavity (31) bottom communicates with the external world by an outlet (32).With reference to accompanying drawing 5, cylindrical cavity bottom, garden can be inserted in a plastic tube (14) plastic tube outer wall and the gluing of housing cavity inner wall is one, this example resilient contact device (12) is a mini button, mini button is fixed on the garden shape insulcrete (17) by two contact pin plug-in mountings, insulcrete (17) is arranged in garden cylindrical cavity (31) together with mini button, the peripheral glue of insulcrete (17) is sitting in the top of plastic tube (14), two contact pin of mini button are passed insulcrete (17) and are stretched into downwards in the plastic tube (14), wherein a contact pin and oscillating element resistance R C(13) an end weld together another contact pin and Rc(13) the other end use lead (15) respectively, lead (19) draws housing by outlet (32) and the extension set emitter is connected to form oscillation circuit.Two contact pin of resistance (13), insulcrete (17), button use epoxy encapsulation in the cavity (16) of plastic tube (14).With reference to accompanying drawing 6, this is a scheme of installation of the sensor, sensor (11) is screwed on the fastening bolt (20) of transformer oil box cover (21), the resilient contact device of sensor internal is that mini button is subjected to the bolt roof pressure, the closing of contact, oscillating element resistance R c(13) is access in the extension set emitter, the extension set emitter utilizes line of electric force to send normal CF signal to main frame, the offender will steal transformer or transformer coil, just must back out sensor (11), sensor (11) is unscrewed, and the resilient contact of the inside is owing to no longer be subjected to the roof pressure of bolt (20), just upspring rapidly, cut off the oscillation circuit that Rc is connected with extension set.If someone wants sensor (11) short circuit, oscillating element is just by short circuit.Below either way make extension set send abnormal signal, cause main frame and report to the police.Can increase a spring (18) in accompanying drawing 5 sensors, so that the button reaction is rapider, during the spring pressurized, elastic force is applied on the button insulcrete (17) on every side.
Also can go out another kind of structure sensor according to above-mentioned principle design, as shown in Figure 7, oscillating element Rc(13) flat inverse bonding is connected on the little printed circuit board, its end and a lead (28) are welded on the copper platinum (23), the other end is welded on the fritter copper platinum (24), copper platinum (24) and the 3rd block of copper platinum (25) constitute two contacts of resilient contact device, they and metallic elastic reed (27) constitute resilient contact device (12) jointly, and copper platinum (25) is gone up welding lead (29).Elastic metallic reed (27) one ends are fixed on the circuit board with clock and watch screw (26), when being under pressure, elastic metallic reed malleation is on the contact of copper platinum (24) and (25) formation, make oscillating element Rc(13) form the loop by lead (28) and (29) with the extension set emitter, pressure is removed, reed (27) is upspring, and Rc opened circuit with being connected of extension set.Use inch that this printed circuit board (PCB) is filled in the slit between transformer oil case lid and fuel tank upper edge, printed board is fixed with glue.Notice that staff can not touch.Remove reed and contact, remainder is wrapped with insulating tape.At ordinary times because the extruding of fuel tank cap, oscillating element Rc(13) inserted oscillation circuit by elastic spring, unscrew the fastening Luo of fuel tank cap when female as the people, fuel tank cap is because the elastic force and the stress own of fuel tank sealing ring, protruding rapidly, the elastic metallic reed is also upspring thereupon, and oscillation circuit opens circuit, and causes main frame and reports to the police.
The available conductive silicon rubber key of above-mentioned elastic metallic reed (27) replaces, and conductive silicon rubber key periphery is glued on printed circuit board (PCB).
Claims (9)
1, a kind of anti-theft alarm for power installation, it comprises:
Main frame is made of receiving device, alarm trigger circuit (5), alert acoustic-electric road (6), power amplifier (7), host power supply (8).Receiving device directly links to each other with line of electric force by the inner couplings circuit, and its output is connected with alarm trigger circuit (5), and the logic output level of receiving device is controlled alarm trigger circuit (5);
Extension set is by transmitting device (9), and Exgt Bat extension battery (10) constitutes, and the signal that transmitting device (9) sends is coupled on the signal circuit of electric wire formation, receives for main frame, if signal interruption, the output of main frame receiving device promptly triggers warning;
It is characterized in that:
The main frame receiving device is made up of n-1 loop receiving device, n is for needing the electric wire number of monitoring simultaneously, 3≤n≤4, the logic output terminal of each loop receiving device connects the input end of a gate circuit (4) respectively, output terminal trigger circuit taking alarm (5) input end of this gate circuit (4), as long as a signal circuit opens circuit, this gate circuit (4) output promptly triggers alarm trigger circuit (5), thereby reaches the purpose that a main frame is guarded the n wire simultaneously;
Determine the oscillating element (13) of transmitting device (9) center oscillation frequency to guide to the extension set outside in the extension set with lead, inter-burst connects into the closure that is under pressure, remove the resilient contact device (12) that pressure disconnects, form sensor (11), resilient contact device (12) is when being under pressure, oscillating element (13) in the sensor (11) promptly is access in former oscillatory circuit, so no matter sensor (11) is by short circuit or open circuit, all destroy former center oscillation frequency condition, extension set just sends abnormal signal, cause main frame and report to the police, thereby reach the purpose of power equipment being carried out antitheft monitoring.
2, according to claim 1 described anti-theft alarm for power installation, it is characterized in that the receiving device logic output of each loop of main frame, signal be a low level just often, is high level during abnormal signal, coupled gate circuit (4) be one or.
3, according to claim 1 described anti-theft alarm for power installation, it is characterized in that the receiving device logic output of each loop of main frame, signal be a high level just often, is low level during abnormal signal, coupled gate circuit (4) be one with.
4, according to claim 1 described anti-theft alarm for power installation, it is characterized in that the oscillating element (13) of extension set sensor (11) and resilient contact device (12) are contained in a profile and are easily removed in the tight sensor housing of subcard (22), one screw (30) is arranged at sensor housing (22) top, be used for being connected with the firm bolt of power equipment, screw (30) is communicated with an areola (31) down, interior dress is fixed on the resilient contact device (12) on the insulcrete (17), one end of a contact serial connection oscillating element (13) of resilient contact device (12), the other end of another contact and oscillating element (13) is used lead (15) respectively, (19) draw from housing by an outlet (32), be used for linking to each other with extension set, resilient contact device (12) the two poles of the earth contact pin and oscillating element (13) are used epoxy sealing, when sensor (11) is screwed on the bolt, resilient contact device (12) in the housing cavity (31) is by the bolt roof pressure, oscillating element (13) promptly is access in extension set emitter (9), during the dismounting clamp nut, the sensor (11) that is pressed on the nut must at first be laid down, resilient contact device (12) disconnects oscillation circuit, causes main frame and reports to the police.
5, according to claim 1 described anti-theft alarm for power installation, the oscillating element that it is characterized in that extension set sensor (11) is a resistor.
6, according to claim 1 described anti-theft alarm for power installation, the oscillating element that it is characterized in that extension set sensor (11) is a capacitor.
7, according to claim 1 described anti-theft alarm for power installation, the oscillating element (13) and the resilient contact device (12) that it is characterized in that extension set sensor (11) are contained on the printed circuit board, oscillating element (13) one ends are connected by copper platinum (23) with a lead (28), the other end is connected with copper platinum (24), copper platinum (24) and the 3rd block of copper platinum (25) constitute two contacts of resilient contact device (12), there is an elastic electric conductor (27) that is fixed on the circuit board top, two contacts, it and two contacts constitute resilient contact device (12), copper platinum (25) links to each other with lead (29), when being under pressure, elastic electric conductor (27) makes two contactings, oscillating element (13) is by lead (28), (29) connect with extension set emitter (9), pressure is removed, elastic electric conductor (27) is upspring, two contacts disconnect, and oscillating element (13) is connected disconnection with extension set.
8,, it is characterized in that elastic electric conductor (27) is an elastic sheet metal according to claim 7 described anti-theft alarm for power installation.
9,, it is characterized in that resilient contact device (12) is a button or button according to claim 1 or 4 or 7 described anti-theft alarm for power installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91206760 CN2091008U (en) | 1991-04-23 | 1991-04-23 | Anti-theft alarm for electric power installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91206760 CN2091008U (en) | 1991-04-23 | 1991-04-23 | Anti-theft alarm for electric power installation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2091008U true CN2091008U (en) | 1991-12-18 |
Family
ID=4916351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91206760 Withdrawn CN2091008U (en) | 1991-04-23 | 1991-04-23 | Anti-theft alarm for electric power installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2091008U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108931818A (en) * | 2017-05-24 | 2018-12-04 | 南宁富桂精密工业有限公司 | Anti-dismantling arrangement for detecting |
-
1991
- 1991-04-23 CN CN 91206760 patent/CN2091008U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108931818A (en) * | 2017-05-24 | 2018-12-04 | 南宁富桂精密工业有限公司 | Anti-dismantling arrangement for detecting |
| CN108931818B (en) * | 2017-05-24 | 2020-06-05 | 南宁富桂精密工业有限公司 | Anti-disassembly detecting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |