CN214669529U - Power transformer detection device - Google Patents
Power transformer detection device Download PDFInfo
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- CN214669529U CN214669529U CN202121038116.6U CN202121038116U CN214669529U CN 214669529 U CN214669529 U CN 214669529U CN 202121038116 U CN202121038116 U CN 202121038116U CN 214669529 U CN214669529 U CN 214669529U
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Abstract
The utility model provides a power transformer detection device, the effectual problem of having influenced the accuracy of the sound signal that sound detection device gathered because of other signal mixes in the sound signal of having solved among the prior art, the utility model discloses a signal acquisition circuit, signal transmission circuit, signal acquisition circuit utilizes microphone M1 to gather the sound signal in the transformer, transmits the sound signal to signal transmission circuit behind receiver and comparator, and signal transmission circuit transmits sound signal to surveillance center, utilizes signal transmission circuit to carry out frequency modulation to sound signal to increase sound signal's interference killing feature, also avoid in the residential area wireless device to send or the signal of receiving mixes in sound signal, avoids influencing surveillance center's analysis.
Description
Technical Field
The utility model relates to a power transformer field, especially power transformer detection device.
Background
The safe operation management work of a power transformer (as shown in fig. 1) is the key point of the daily work of a power department, and once an accident occurs, the power supply reliability and the normal operation of a power system are seriously threatened, so that immeasurable loss is caused. However, in long-term practice, it is found that when a power transformer works normally, uniform "hum" electromagnetic hum is emitted, and on the premise that hardware facilities of the power transformer are not in fault, if suddenly emitted sound is higher than usual, the power transformer works abnormally, so that normal operation of power supply of a power system is easily influenced, and use of people is also indirectly influenced.
In the prior art, a transformer working sound detection device is designed to replace manual inspection, but as part of power transformers are arranged in a residential area with dense houses, signals sent or received by wireless equipment such as a television and a computer in the residential area are more, and the signals are mixed in sound signals and transmitted to a monitoring center, so that the accuracy of the sound signals collected by the sound detection device is influenced.
Therefore, the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims at providing a power transformer detection device, the effectual problem of influencing the accuracy of the sound signal that sound detection device gathered in the sound signal because of other signal mixes among the prior art of having solved.
The technical scheme who solves is, power transformer detection device, the device includes signal acquisition circuit, signal transmission circuit, the sound signal in the transformer is gathered to signal acquisition circuit utilization microphone M1, transmits the sound signal to signal transmission circuit behind receiver and the comparator, and signal transmission circuit transmits the sound signal to the surveillance center.
Further, the signal acquisition circuit comprises a receiver and a comparator, wherein the receiver receives and band-pass filters the sound signal acquired by the microphone M1, and outputs the comparison result and the sound signal to the signal transmission circuit after the sound signal passes through the comparator.
Further, the receiver includes a capacitor C1, one end of the capacitor C1 is connected to one end of a resistor R13, one end of a resistor R1, and one end of a microphone M1, the other end of the capacitor C1 is connected to one end of a capacitor C3 and one end of an inductor L1, the other end of the inductor L1 is connected to one end of a resistor R3 and one end of a capacitor C2, the other end of the resistor R3 is connected to one end of a capacitor C4, one end of a capacitor C6, and one end of a resistor R4, the other end of the capacitor C4 is connected to one end of a resistor R10, the other end of the resistor R10 is connected with the other end of the capacitor C6 and the output end of the operational amplifier U2B respectively at the inverting end of the operational amplifier U2B, the in-phase end of the operational amplifier U2B is connected with one end of the resistor R12, the other end of the resistor R12 is connected with the other end of the resistor R4, the other end of the capacitor C2, the other end of the capacitor C1, the other end of the resistor R1 and the other end of the microphone M1 and grounded respectively, and the other end of the resistor R13 is connected with the positive power supply VCC.
Further, the comparator comprises a resistor R9, one end of the resistor R9 is connected with the output end of an operational amplifier U2B in the comparator, the other end of the resistor R9 is connected with one end of a resistor R16, one end of a capacitor C5 and the output end of an operational amplifier U3B, the same-phase end of the operational amplifier U3B is connected with one end of the resistor R17, the output end of the operational amplifier U3B is connected with the other end of the resistor R16 and the other end of the capacitor C5, one end of a resistor R5 and the other end of a resistor R3 in the receiver, the other end of a resistor R5 is connected with the in-phase end of an operational amplifier U1B, the inverting end of the operational amplifier U1B is respectively connected with one end of a resistor R7 and one end of a resistor R6, the other end of the resistor R7 is connected with a normal signal, the output end of the operational amplifier U1B is connected with the other end of a resistor R6, and the other end of an electrical fault R17 is respectively connected with the other end of a resistor R12 in the receiver and the other end of a resistor R4 and is grounded.
Furthermore, the signal transmission circuit is conducted according to the potential of the comparison result transmitted by the signal acquisition circuit, and the sound signal is transmitted to the monitoring center after being subjected to frequency modulation by the signal transmission circuit.
Further, the signal transmission circuit comprises a thyristor Q1, a control electrode of the thyristor Q1 is connected with an output end of an operational amplifier U1B in the signal acquisition circuit, an anode of the thyristor Q1 is connected with a non-inverting end of the operational amplifier U1B in the signal acquisition circuit, a cathode of the thyristor Q1 is connected with one end of a capacitor C7, the other end of the capacitor C7 is respectively connected with one end of a resistor R15, a lower end of an adjustable resistor R2 and a base of a triode Q2, a collector of the triode Q2 is respectively connected with one end of the resistor R11, one end of a capacitor C9, one end of a resonator Y1, one end of a resistor R14, the other end of the resistor R14 is respectively connected with a monitoring center and a negative electrode of a voltage regulator D1, an anode of the voltage regulator D1 is respectively connected with the other end of a resonator Y1, one end of the capacitor C8, one end of the resistor R8, the other end of the resistor R15, the other end of an emitter of the transistor C2 in the signal acquisition circuit and is grounded, and a resistor R2 of the transistor Q2 is respectively connected with the other end of the amplifier R393939 8 in the signal acquisition circuit, The other end of the capacitor C8, the other end of the capacitor C9 and the other end of the resistor R11 are respectively connected with the upper end and the adjustable end of the adjustable resistor R2 and the other end of the resistor R13 in the signal acquisition circuit and connected with a positive power supply VCC.
The utility model discloses a following beneficial effect:
the voice signal is subjected to band-pass filtering in a filter consisting of a resistor R3, a resistor R4, a resistor R10, a capacitor C6, a capacitor C4 and an operational amplifier U2B, signals sent or received by wireless equipment in a residential area, such as a television and a computer, are filtered, only the frequency of the voice signal is reserved, the phenomenon that the signals sent or received by wireless receiving equipment are mixed in the voice signal to influence the accuracy of the voice signal is avoided, a signal transmission circuit is conducted by utilizing the potential of the result output by the operational amplifier U1B, the phenomenon that the signal transmission circuit is started when the voice signal is normal to cause resource waste is avoided, the frequency modulation is carried out on a frequency modulator consisting of a triode Q2, a resistor R8, a resistor R15, a resistor R11, a capacitor C9, a capacitor C7, a capacitor C8 and a crystal oscillator Y1, so as to increase the performance of the voice signal, and avoid the interference resistance, and the signals sent or received by the wireless equipment in the residential area are mixed in the voice signal, and the influence on the accuracy of the sound signal and the analysis of the monitoring center is avoided.
Drawings
Fig. 1 is a schematic diagram of a power transformer.
Fig. 2 is a schematic circuit diagram of the power transformer detection device of the present invention.
Detailed Description
The foregoing and other technical and scientific aspects, features and advantages of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings of fig. 1-2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The power transformer detection device is applied to the interior of a transformer and comprises a signal acquisition circuit and a signal transmission circuit, wherein the signal acquisition circuit comprises a receiver and a comparator, the receiver acquires a sound signal when the power transformer works by using a microphone M1, the acquired sound signal is coupled to an inductor L1, a capacitor C2 and a capacitor C3 by using a capacitor C1 for impedance matching, the sound signal after impedance matching is transmitted to a filter consisting of a resistor R3, a resistor R4, a resistor R10, a capacitor C6, a capacitor C4 and an operational amplifier U2B for band-pass filtering, signals sent or received by wireless equipment such as a television and a computer in a residential area are filtered, the sound signal is transmitted to the comparator, the comparator transmits the sound signal to the operational amplifier U3B by using a resistor R9, the operational amplifier U3B, the resistor R16 and the capacitor C5 are used for improving the Q value of the filter and avoiding the Q value of the filter from being too low, the sound signal is transmitted to an operational amplifier U1B through a resistor R5, the operational amplifier U1B compares the sound signal with a normal signal, a comparison result is output to a signal transmission circuit, meanwhile, the sound signal is also transmitted to the signal transmission circuit, the signal transmission circuit receives the comparison result transmitted by a signal acquisition circuit, the potential of the comparison result switches on a thyristor Q1, the power transformer works abnormally at the moment, the signal transmission circuit is switched on, the thyristor Q1 transmits the sound signal to a frequency modulator consisting of a triode Q2, a resistor R8, a resistor R15, a resistor R11, a capacitor C9, a capacitor C7, a capacitor C8 and a crystal resonator Y1 to perform frequency modulation, and the frequency modulator, the resistor R14 and a voltage stabilizing tube D1 are used for voltage stabilization, so that the sound signal is stabilized in a certain range and is output to a monitoring center, and the monitoring center analyzes the sound signal;
the signal acquisition circuit comprises a receiver and a comparator, wherein the receiver acquires a sound signal when the power transformer works by using a microphone M1, the resistor R1 and the resistor R13 are used for voltage division to provide voltage for the microphone M1, so that the microphone M1 can start the sound signal acquisition work, the acquired sound signal is coupled to an inductor L1, a capacitor C2 and a capacitor C3 by using a capacitor C1 for impedance matching, the sound signal after impedance matching is transmitted to a filter consisting of a resistor R3, a resistor R4, a resistor R10, a capacitor C6, a capacitor C4 and an operational amplifier U2B for band-pass filtering, signals transmitted or received by wireless equipment such as a television and a computer in a residential area are filtered, only the frequency of the sound signal is reserved, and the situation that the signal transmitted or received by the wireless receiving equipment is mixed in the sound signal is avoided, and the accuracy of the sound signal is influenced, the sound signal is transmitted to the comparator, the comparator transmits the sound signal to the operational amplifier U3B by using a resistor R9, the operational amplifier U3B, the resistor R16 and the capacitor C5 are used for improving the Q value of the filter, the phenomenon that the Q value of the filter is too low and large loss is caused to the sound signal is avoided, the sound signal is transmitted to the operational amplifier U1B through a resistor R5, the operational amplifier U1B compares the sound signal with a normal signal, the sound signal when the power transformer normally works is taken as the normal signal, the comparison result is output to the signal transmission circuit, and meanwhile, the sound signal is also transmitted to the signal transmission circuit;
the receiver comprises a capacitor C1, one end of a capacitor C1 is respectively connected with one end of a resistor R13, one end of a resistor R1 and one end of a microphone M1, the other end of the capacitor C1 is respectively connected with one end of a capacitor C3 and one end of an inductor L1, the other end of an inductor L1 is respectively connected with one end of a resistor R3 and one end of a capacitor C2, one end of a capacitor C4, one end of a capacitor C6 and one end of a resistor R4 are respectively connected with a resistor R3, the other end of the capacitor C4 is respectively connected with one end of a resistor R10, the other end of the resistor R10 is connected with the other end of the capacitor C6 and the output end of the operational amplifier U2B respectively at the inverting end of the operational amplifier U2B, the in-phase end of the operational amplifier U2B is connected with one end of the resistor R12, the other end of the resistor R12 is connected with the other end of the resistor R4, the other end of the capacitor C2, the other end of the capacitor C1, the other end of the resistor R1 and the other end of the microphone M1 and grounded respectively, and the other end of the resistor R13 is connected with a positive power supply VCC;
the comparator comprises a resistor R9, one end of a resistor R9 is connected with the output end of an operational amplifier U2B in the comparator, the other end of the resistor R9 is connected with one end of a resistor R16, one end of a capacitor C5 and the output end of an operational amplifier U3B, the in-phase end of the operational amplifier U3B is connected with one end of a resistor R17, the output end of the operational amplifier U3B is connected with the other end of a resistor R16, the other end of a capacitor C5, one end of a resistor R5 and the other end of a resistor R3 in the receiver, the other end of the resistor R5 is connected with the in-phase end of an operational amplifier U1B, the inverting end of the operational amplifier U1B is connected with one end of a resistor R7 and one end of a resistor R6, the other end of a resistor R7 is connected with a normal signal, the output end of an operational amplifier U1B is connected with the other end of a resistor R6, and the other end of an electrical fault R17 is connected with the other end of a resistor R12 and the other end of the resistor R4 in the receiver and grounded;
the signal transmission circuit receives a comparison result transmitted by the signal acquisition circuit, when the potential of the comparison result is lower, the thyristor Q1 cannot be conducted, the power transformer works normally at the moment, when the potential of the comparison result is higher, the thyristor Q1 is conducted, the power transformer works abnormally at the moment, and the fault possibility exists, the signal transmission circuit is conducted, at the moment, the thyristor Q1 transmits a sound signal to a frequency modulator consisting of the triode Q2, the resistor R8, the resistor R15, the resistor R11, the capacitor C9, the capacitor C7, the capacitor C8 and the crystal resonator Y1 for frequency modulation, so that the anti-interference performance of the sound signal is improved, and the resistor R14 and the voltage regulator D1 are utilized for voltage stabilization, so that the sound signal is stabilized in a certain range and is output to a monitoring center, and the monitoring center analyzes the sound signal;
the signal transmission circuit comprises a thyristor Q1, a control electrode of the thyristor Q1 is connected with an output end of an operational amplifier U1B in the signal acquisition circuit, an anode of a thyristor Q1 is connected with a non-inverting end of the operational amplifier U1B in the signal acquisition circuit, a cathode of the thyristor Q1 is connected with one end of a capacitor C7, the other end of the capacitor C7 is connected with one end of a resistor R15, the lower end of an adjustable resistor R2 and the base of a triode Q2, a collector of the triode Q2 is connected with one end of a resistor R11, one end of a capacitor C9, one end of a crystal Y1 and one end of a resistor R14, the other end of a resistor R14 is connected with a monitoring center and the negative electrode of a voltage regulator D1, an anode of the voltage regulator D1 is connected with the other end of a crystal Y1, one end of a capacitor C8, one end of a resistor R8, the other end of a resistor R8 and the other end of a triode R8 are connected with the output end of the signal acquisition circuit and grounded, and the emitter of the transistor C8, The other end of the capacitor C8, the other end of the capacitor C9 and the other end of the resistor R11 are respectively connected with the upper end and the adjustable end of the adjustable resistor R2 and the other end of the resistor R13 in the signal acquisition circuit and connected with a positive power supply VCC.
When the utility model is used, the signal acquisition circuit comprises a receiver and a comparator, the receiver acquires the sound signal of the power transformer during operation by using a microphone M1, the acquired sound signal is coupled to an inductor L1 by using a capacitor C1, the capacitor C2 and the capacitor C3 are subjected to impedance matching, the sound signal after impedance matching is transmitted to a resistor R3, a resistor R4, a resistor R10, a capacitor C6, a capacitor C4 and a filter formed by an operational amplifier U2B are subjected to band-pass filtering, the wireless equipment in a residential area, such as a television and a computer, sends or receives signals, the sound signal is transmitted to the comparator, the comparator transmits the sound signal to the operational amplifier U3B by using a resistor R9, the operational amplifier U3B, the resistor R16 and the capacitor C5 are used for improving the Q value of the filter, the Q value of the filter is prevented from being too low, the sound signal is transmitted to the operational amplifier U1B through a resistor R5, the operational amplifier U1B compares the sound signal with the signal, the comparison result is output to a signal transmission circuit, meanwhile, the sound signal is also transmitted to the signal transmission circuit, the signal transmission circuit receives the comparison result transmitted by the signal acquisition circuit, the potential of the comparison result conducts a thyristor Q1, the power transformer works abnormally at the moment, the signal transmission circuit is conducted, at the moment, the thyristor Q1 transmits the sound signal to a frequency modulator consisting of a triode Q2, a resistor R8, a resistor R15, a resistor R11, a capacitor C9, a capacitor C7, a capacitor C8 and a crystal oscillator Y1 for frequency modulation, and the resistor R14 and a voltage stabilizing tube D1 are utilized for voltage stabilization, so that the sound signal is stabilized in a certain range and is output to a monitoring center, and the monitoring center analyzes the sound signal;
the voice signal is subjected to band-pass filtering in a filter consisting of a resistor R3, a resistor R4, a resistor R10, a capacitor C6, a capacitor C4 and an operational amplifier U2B, signals sent or received by wireless equipment in a residential area, such as a television and a computer, are filtered, only the frequency of the voice signal is reserved, the phenomenon that the signals sent or received by wireless receiving equipment are mixed in the voice signal to influence the accuracy of the voice signal is avoided, a signal transmission circuit is conducted by utilizing the potential of the result output by the operational amplifier U1B, the phenomenon that the signal transmission circuit is started when the voice signal is normal to cause resource waste is avoided, the frequency modulation is carried out on a frequency modulator consisting of a triode Q2, a resistor R8, a resistor R15, a resistor R11, a capacitor C9, a capacitor C7, a capacitor C8 and a crystal oscillator Y1, so as to increase the performance of the voice signal, and avoid the interference resistance, and the signals sent or received by the wireless equipment in the residential area are mixed in the voice signal, and the influence on the accuracy of the sound signal and the analysis of the monitoring center is avoided.
Claims (6)
1. The power transformer detection device is characterized by comprising a signal acquisition circuit and a signal transmission circuit, wherein the signal acquisition circuit acquires a sound signal in a transformer by using a microphone M1, the sound signal is transmitted to the signal transmission circuit after passing through a receiver and a comparator, and the signal transmission circuit transmits the sound signal to a monitoring center.
2. The power transformer detection device of claim 1, wherein the signal acquisition circuit comprises a receiver and a comparator, the receiver receives and band-pass filters the sound signal acquired by the microphone M1, and outputs the comparison result and the sound signal to the signal transmission circuit after the sound signal passes through the comparator.
3. The power transformer detection device of claim 2, wherein the receiver comprises a capacitor C1, one end of a capacitor C1 is connected to one end of a resistor R13, one end of a resistor R1 and one end of a microphone M1, the other end of a capacitor C1 is connected to one end of a capacitor C3 and one end of an inductor L1, the other end of the inductor L1 is connected to one end of a resistor R3 and one end of a capacitor C2, one end of a resistor R3 is connected to one end of a capacitor C4, one end of a capacitor C6 and one end of a resistor R4, the other end of a capacitor C4 is connected to one end of a resistor R10 and an inverting terminal of an operational amplifier U2B, the other end of a resistor R10 is connected to the other end of a capacitor C6 and an output terminal of an operational amplifier U2B, the inverting terminal of an operational amplifier U2B is connected to one end of a resistor R12, the other end of a resistor R12 is connected to the other end of a resistor R4, the other end of a capacitor C2 and the other end of a capacitor C1, The other end of the resistor R1 and the other end of the microphone M1 are grounded, and the other end of the resistor R13 is connected to a positive power source VCC.
4. The power transformer detection device of claim 2, wherein the comparator comprises a resistor R9, one end of a resistor R9 is connected to the output end of an operational amplifier U2B in the comparator, the other end of the resistor R9 is connected to one end of a resistor R16, one end of a capacitor C5, and the output end of an operational amplifier U3B, the non-inverting end of the operational amplifier U3B is connected to one end of a resistor R17, the output end of the operational amplifier U3B is connected to the other end of a resistor R16, the other end of a capacitor C5, one end of a resistor R5, and the other end of a resistor R3 in the receiver, the other end of a resistor R5 is connected to the non-inverting end of the operational amplifier U1B, the inverting end of the operational amplifier U1B is connected to one end of a resistor R7 and one end of a resistor R6, the other end of a resistor R7 is connected to a normal signal, the output end of an operational amplifier U1B is connected to the other end of a resistor R6, and the other end of an electrical fault R17 is connected to the other end of the amplifier R12 in the receiver, The other end of the resistor R4 is connected to ground.
5. The power transformer detection device of claim 1, wherein the signal transmission circuit is turned on according to the potential of the comparison result transmitted from the signal acquisition circuit, and the signal transmission circuit transmits the frequency-modulated sound signal to the monitoring center.
6. The power transformer detection device of claim 5, wherein the signal transmission circuit comprises a thyristor Q1, a control electrode of the thyristor Q1 is connected to an output terminal of an operational amplifier U1B in the signal acquisition circuit, an anode of the thyristor Q1 is connected to a non-inverting terminal of the operational amplifier U1B in the signal acquisition circuit, a cathode of the thyristor Q1 is connected to one end of a capacitor C7, the other end of the capacitor C7 is connected to one end of a resistor R15, a lower end of an adjustable resistor R2 and a base of a triode Q2, a collector of the triode Q2 is connected to one end of the resistor R11, one end of a capacitor C9, one end of a crystal oscillator Y1 and one end of a resistor R14, the other end of the resistor R14 is connected to a monitoring center and a negative electrode of a voltage regulator D1, and an anode of the voltage regulator D1 is connected to the other end of a crystal oscillator Y1, one end of the capacitor C8, one end of the resistor R8 and the other end of the resistor R15, The other end of a capacitor C2 in the signal acquisition circuit is grounded, an emitter of a triode Q2 is respectively connected with the other end of a resistor R8, the other end of a capacitor C8 and the other end of a capacitor C9, the other end of a resistor R11 is respectively connected with the upper end and the adjustable end of an adjustable resistor R2, and the other end of a resistor R13 in the signal acquisition circuit is connected with a positive power supply VCC.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121038116.6U CN214669529U (en) | 2021-05-15 | 2021-05-15 | Power transformer detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121038116.6U CN214669529U (en) | 2021-05-15 | 2021-05-15 | Power transformer detection device |
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| CN214669529U true CN214669529U (en) | 2021-11-09 |
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| CN202121038116.6U Active CN214669529U (en) | 2021-05-15 | 2021-05-15 | Power transformer detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113970357A (en) * | 2021-11-30 | 2022-01-25 | 河南职业技术学院 | Power switch cabinet detection circuit based on Internet of things |
| CN114062920A (en) * | 2021-11-30 | 2022-02-18 | 河南职业技术学院 | Internet of things detection circuit for power switch cabinet |
-
2021
- 2021-05-15 CN CN202121038116.6U patent/CN214669529U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113970357A (en) * | 2021-11-30 | 2022-01-25 | 河南职业技术学院 | Power switch cabinet detection circuit based on Internet of things |
| CN114062920A (en) * | 2021-11-30 | 2022-02-18 | 河南职业技术学院 | Internet of things detection circuit for power switch cabinet |
| CN114062920B (en) * | 2021-11-30 | 2023-07-14 | 河南职业技术学院 | Internet of things detection circuit for power switch cabinet |
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