CN203232525U - Signal amplifying circuit in antitheft monitoring system of transformer - Google Patents
Signal amplifying circuit in antitheft monitoring system of transformer Download PDFInfo
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- CN203232525U CN203232525U CN 201320258353 CN201320258353U CN203232525U CN 203232525 U CN203232525 U CN 203232525U CN 201320258353 CN201320258353 CN 201320258353 CN 201320258353 U CN201320258353 U CN 201320258353U CN 203232525 U CN203232525 U CN 203232525U
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Abstract
The utility model discloses a signal amplifying circuit in an antitheft monitoring system of a transformer, and the amplifying circuit comprises an infrared sensor (J1), a first capacitor (C1), a first triode (Q1), a second capacitor (C2), a first operational amplifier (A1), and an amplified signal output line (3), wherein two terminals of the first capacitor (C1) are respectively connected with the infrared sensor (J1) and the base electrode of the first triode (Q1). The emitting electrode of the first triode (Q1) is grounded. Two terminals of the second capacity (C2) are respectively connected with the collecting electrode of the first triode (Q1) and the non-inverting input terminal of the first operational amplifier (A1). The amplified signal output line (3) is connected with the first operational amplifier (A1). When the amplifying circuit is used in a transformer antitheft system, the signals collected by the infrared sensor (J1) can be amplified, which is thereby convenient for a monitoring system in the antitheft system to make correct judgments so as to guarantee the normal application of an infrared antitheft system of the transformer and reinforce antitheft performance.
Description
Technical field
The utility model relates to a kind of burglary-resisting system, specifically is the amplifying circuit of signal in the transformer anti-theft supervisory system.
Background technology
In recent years, the stolen phenomenon of electric power facility takes place often, and this is not only threatening the safe operation of electrical network, has also had a strong impact on industrial and agricultural production and the people's household electricity.In order to ensure the reliability service of electrical network, improve the theftproof performance of electric power facility self, reduce the stolen event of electric power facility to greatest extent, this becomes present people's question of common concern.
The ratio of in the electric power facility theft transformer integral body being stolen or stolen copper core in the transformer is higher, and therefore, solving the stolen problem of transformer becomes an important step that prevents that electric power facility is stolen.Transformer anti-theft adopts infrared sensor to survey the infrared signal that human body radiation goes out often, and make corresponding judgement by supervisory system according to the signal that detects, indicate the joint defence personnel to rush towards the scene when supervisory system has the lawless person to get involved as if affirmation the lawless person is admonished, and then prevent that the lawless person from stealing transformer.Yet, fainter when infrared sensor is exported the signal that detects, be not easy to supervisory system and make corresponding judgement, this can have influence on the theftproof performance of existing transformer anti-theft system.
The utility model content
The purpose of this utility model is to solve existing transformer anti-theft system influences the problem that supervisory system is made judgement because infrared sensor output infrared signal is faint, the amplifying circuit of signal in a kind of transformer anti-theft supervisory system is provided, can amplify the infrared signal of infrared sensor output when it is used, guarantee that burglary-resisting system makes right judgement.
The purpose of this utility model is achieved through the following technical solutions: the amplifying circuit of signal in the transformer anti-theft supervisory system, comprise infrared sensor, first electric capacity, first triode, second electric capacity, first operational amplifier and amplifying signal outlet line, the described first electric capacity two ends are connected with first transistor base with infrared sensor respectively, the grounded emitter of first triode, the described second electric capacity two ends are connected with the in-phase input end of first transistor collector with first operational amplifier respectively, and described amplifying signal outlet line is connected with first operational amplifier output terminal.Wherein, first electric capacity and second electric capacity are as coupling capacitance, the signal that infrared sensor collected when the utility model was used is through first capacitive coupling, signal after coupling is imported in first triode and is amplified, input first operational amplifier after signal after the elementary amplification is coupled through second electric capacity again, amplified again by first operational amplifier, the signal after the amplification is exported by the amplifying signal outlet line again.
The amplifying circuit of signal in the transformer anti-theft supervisory system, also comprise the 4th resistance and the 3rd electric capacity, described the 4th resistance formation first parallel branch in parallel with the 3rd electric capacity, the described first parallel branch two ends are connected with output terminal with the inverting input of first operational amplifier respectively, and described amplifying signal outlet line is connected on the circuit between first parallel branch and first operational amplifier output terminal.Wherein, the 4th resistance and the 3rd electric capacity constitute feedback circuit, and the 3rd electric capacity carries out filtering to feedback signal, by the feedback circuit that the 4th resistance and the 3rd electric capacity constitute, the stability in the time of improving the first operational amplifier amplifying signal.
Described infrared sensor is connected with the first voltage input line road, and described first operational amplifier is connected with the second voltage input line road.When the utility model was used, the first voltage input line road and the second voltage input line road were all for external power supply.
The amplifying circuit of signal in the transformer anti-theft supervisory system also comprises second resistance, and described second resistance, one end is connected on the circuit between first transistor collector and second electric capacity, and the other end of second resistance is connected with the first voltage input line road.The utility model is with the pull-up resistor of second resistance as first triode, and uncertain signal is clamped at high level by second resistance, and second resistance plays metering function simultaneously.
The amplifying circuit of signal in the transformer anti-theft supervisory system also comprises the 3rd resistance, and described the 3rd resistance one end is connected with circuit between first transistor collector and second electric capacity, and its other end is connected with circuit between first electric capacity and first transistor base.When the utility model was used, the 3rd resistance guaranteed to provide static base voltage to first triode, and then guarantees the operation that first triode is stable.
The amplifying circuit of signal in the transformer anti-theft supervisory system also comprises first resistance, and described first resistance, one end is connected on the circuit between infrared sensor and first electric capacity, one end ground connection.Wherein, first resistance is as the source resistance of infrared sensor.
The amplifying circuit of signal in the transformer anti-theft supervisory system, described first resistance is adjustable resistance.Wherein, first resistance adopts adjustable resistance, is convenient to according to specific circumstances first resistance be regulated when the utility model is used, and is stable during the infrared sensor output signal when guaranteeing that the utility model is used.
As preferably, described first triode is the NPN triode.
Compared with prior art, the utlity model has following beneficial effect: the utility model comprises infrared sensor, first electric capacity, first triode, second electric capacity and first operational amplifier, one-piece construction is simple, be convenient to realize, when the utility model is used if there is the lawless person to get involved the transformer scene, infrared sensor is gathered infrared signal and is exported ultra-weak electronic signal, faint electric signal through first capacitive coupling after the input first triode, first triode exports second electric capacity to after feeble signal is amplified, input first operational amplifier after the signal that second electric capacity is exported first triode is coupled again, first operational amplifier amplifies back output again to signal, so, the supervisory system of transformer anti-theft system is convenient to the electric signal that collects is compared, and then make accurate judgment, guarantee the normal use of transformer anti-theft system; The utility model carries out twice amplification to the infrared signal of gathering, and can make signal reach the standard of being convenient to measure, and further guarantees the accuracy that supervisory system was measured when the utility model was used for the transformer anti-theft system.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
The corresponding name of Reference numeral is called in the accompanying drawing: J1, infrared sensor, R1, first resistance, R2, second resistance, R3, the 3rd resistance, R4, the 4th resistance, C1, first electric capacity, C2, second electric capacity, C3, the 3rd electric capacity, Q1, first triode, 1, the first supply voltage incoming line, 2, second source voltage input line road, 3, the amplifying signal outlet line.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.
Embodiment
As shown in Figure 1, the amplifying circuit of signal in the transformer anti-theft supervisory system, comprise infrared sensor J1, first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3, the first triode Q1 and first operational amplifier A 1, wherein, the first triode Q1 is the NPN triode.Infrared sensor J1 comprises D, S, three pins of G, and the D pin connects the first supply voltage incoming line 1, and the S pin is connected with first capacitor C 1, G pin ground connection, wherein, electric signal to the first capacitor C 1 that the output of S pin is faint.The other end that first capacitor C 1 connects infrared sensor 1 end relatively is connected with the base stage of the first triode Q1, the grounded emitter of the first triode Q1, second capacitor C, 2 two ends are connected with the in-phase input end of the first triode Q1 collector and first operational amplifier A 1 respectively.The 4th resistance R 4 and the 3rd capacitor C 3 formation first parallel branches in parallel, the first parallel branch two ends are connected with output terminal with the inverting input of first operational amplifier A 1 respectively, and amplifying signal outlet line 3 is connected on the circuit between first parallel branch and first operational amplifier A, 1 output terminal.
Infrared sensor J1 is connected with the first voltage input line road, 1, the first operational amplifier A 1 and is connected with the second voltage input line road 2.Second resistance R, 2 one ends are connected on the circuit between the first triode Q1 collector and second capacitor C 2, and the other end of second resistance R 2 is connected with the first voltage input line road 1.The 3rd resistance R 3 one ends are connected with circuit between the first triode Q1 collector and second capacitor C 2, and its other end is connected with circuit between first capacitor C 1 and the first triode Q1 base stage.First resistance R 1 is adjustable resistance, and first resistance R, 1 one ends are connected on the circuit between infrared sensor J1 and first capacitor C 1, one end ground connection.
Infrared sensor J1 preferably adopts double base pyroelectric infrared sensor RE200B in the present embodiment, the resistance of first resistance R 1 is set in 0～47K Ω scope adjustable, the first triode Q1 preferably adopts S9014, first operational amplifier A, the 1 preferred LM324 that adopts, the resistance of second resistance R 2 and the 3rd resistance R 3 is set at 1K Ω, the resistance of the 4th resistance R 4 is set at 300 K Ω, and first capacitor C 1 and second capacitor C, 2 appearance values are 47uF.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that embodiment of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, not breaking away from other embodiments that draw under the technical solution of the utility model, all should be included in the protection domain of the present utility model.
Claims (8)
1. the amplifying circuit of signal in the transformer anti-theft supervisory system, it is characterized in that: comprise infrared sensor (J1), first electric capacity (C1), first triode (Q1), second electric capacity (C2), first operational amplifier (A1) and amplifying signal outlet line (3), described first electric capacity (C1) two ends are connected with first triode (Q1) base stage with infrared sensor (J1) respectively, the grounded emitter of first triode (Q1), described second electric capacity (C2) two ends are connected with the in-phase input end of first triode (Q1) collector and first operational amplifier (A1) respectively, and described amplifying signal outlet line (3) is connected with first operational amplifier (A1) output terminal.
2. the amplifying circuit of signal in the transformer anti-theft supervisory system according to claim 1, it is characterized in that: also comprise the 4th resistance (R4) and the 3rd electric capacity (C3), described the 4th resistance (R4) formation first parallel branch in parallel with the 3rd electric capacity (C3), the described first parallel branch two ends are connected with output terminal with the inverting input of first operational amplifier (A1) respectively, and described amplifying signal outlet line (3) is connected on the circuit between first parallel branch and first operational amplifier (A1) output terminal.
3. the amplifying circuit of signal in the transformer anti-theft supervisory system according to claim 1, it is characterized in that: described infrared sensor (J1) is connected with the first voltage input line road (1), and described first operational amplifier (A1) is connected with the second voltage input line road (2).
4. the amplifying circuit of signal in the transformer anti-theft supervisory system according to claim 3, it is characterized in that: also comprise second resistance (R2), described second resistance (R2) end is connected on the circuit between first triode (Q1) collector and second electric capacity (C2), and the other end of second resistance (R2) is connected with the first voltage input line road (1).
5. the amplifying circuit of signal in the transformer anti-theft supervisory system according to claim 1, it is characterized in that: also comprise the 3rd resistance (R3), described the 3rd resistance (R3) end is connected with circuit between first triode (Q1) collector and second electric capacity (C2), and its other end is connected with circuit between first electric capacity (C1) and first triode (Q1) base stage.
6. according to the amplifying circuit of signal in any described transformer anti-theft supervisory system in the claim 1～5, it is characterized in that: also comprise first resistance (R1), described first resistance (R1) end is connected on the circuit between infrared sensor (J1) and first electric capacity (C1), one end ground connection.
7. the amplifying circuit of signal in the transformer anti-theft supervisory system according to claim 6, it is characterized in that: described first resistance (R1) is adjustable resistance.
8. according to the amplifying circuit of signal in any described transformer anti-theft supervisory system in the claim 1～5, it is characterized in that: described first triode (Q1) is the NPN triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320258353 CN203232525U (en) | 2013-05-14 | 2013-05-14 | Signal amplifying circuit in antitheft monitoring system of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320258353 CN203232525U (en) | 2013-05-14 | 2013-05-14 | Signal amplifying circuit in antitheft monitoring system of transformer |
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| Publication Number | Publication Date |
|---|---|
| CN203232525U true CN203232525U (en) | 2013-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320258353 Expired - Fee Related CN203232525U (en) | 2013-05-14 | 2013-05-14 | Signal amplifying circuit in antitheft monitoring system of transformer |
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| CN (1) | CN203232525U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103268683A (en) * | 2013-05-14 | 2013-08-28 | 成都荣耀科技有限公司 | Circuit of amplifying signal in transformer anti-theft monitoring system |
-
2013
- 2013-05-14 CN CN 201320258353 patent/CN203232525U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103268683A (en) * | 2013-05-14 | 2013-08-28 | 成都荣耀科技有限公司 | Circuit of amplifying signal in transformer anti-theft monitoring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 Termination date: 20140514 |