CN214045845U - Video monitoring device of transformer substation - Google Patents
Video monitoring device of transformer substation Download PDFInfo
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- CN214045845U CN214045845U CN202120425184.1U CN202120425184U CN214045845U CN 214045845 U CN214045845 U CN 214045845U CN 202120425184 U CN202120425184 U CN 202120425184U CN 214045845 U CN214045845 U CN 214045845U
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- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 17
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- 238000012544 monitoring process Methods 0.000 description 10
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Abstract
The utility model discloses a video monitoring device of a transformer substation, which comprises a filter circuit, a noise reduction circuit, a signal detection and amplification circuit and an impedance matching circuit, wherein the filter circuit receives a video signal transmitted by a signal receiving module and transmits the video signal to the noise reduction circuit after filtering the video signal; the noise reduction circuit performs noise reduction amplification on the filtered video signal and then transmits the video signal to the signal detection amplifying circuit, and the signal detection amplifying circuit performs high-low level detection on the received noise-reduced and amplified video signal and then transmits the video signal to the impedance matching circuit; the impedance matching circuit is connected with the AD conversion module. The utility model discloses can carry out filtering noise reduction amplification processing to video signal well, utilize triode Q1 and triode Q2 to carry out the high low level to video signal and detect and ensured final output video signal's stability.
Description
Technical Field
The utility model relates to a transformer substation monitors technical field, especially relates to a video monitoring device of transformer substation.
Background
The transformer substation video monitoring system is an important component for realizing intelligent safety management of a transformer substation by a power grid company, and provides important guarantee for safe and stable operation of a power grid. The transformer substation video monitoring system shoots a transformer substation in real time through a mobile or fixed camera arranged in the transformer substation, a video signal output by the camera is wirelessly sent to a signal receiving module arranged at a monitoring center through a signal sending module, the signal receiving module amplifies the video signal and sends the amplified video signal to an AD conversion module, the AD conversion module is connected with a monitoring host, and the monitoring host displays the video signal after conversion through a display screen for monitoring personnel to check in real time. The monitoring personnel can check and manage the running state of the transformer substation in real time through the monitoring host in the monitoring center, and the realization of the power grid running modes such as intelligent transformer substations, unattended transformer substations, centralized monitoring of transformer substation running, remote dispatching operation and the like is well promoted.
However, due to the complex electromagnetic signal environment in the transformer substation and the conditions such as rainy weather, the video signal is easily interfered or attenuated in the transmission process, the final imaging quality of the video signal is seriously affected, and the monitoring personnel cannot accurately master the operation condition of the transformer substation.
SUMMERY OF THE UTILITY MODEL
To leading to the unsafe technical problem of received signal because of interference or decay among the video signal transmission process, the utility model provides a video monitoring device of transformer substation.
A video monitoring device of a transformer substation comprises a filter circuit, a noise reduction circuit, a signal detection amplifying circuit and an impedance matching circuit, wherein the filter circuit receives a video signal transmitted by a signal receiving module, filters the video signal and transmits the video signal to the noise reduction circuit; the noise reduction circuit performs noise reduction amplification on the filtered video signal and then transmits the video signal to the signal detection amplifying circuit, and the signal detection amplifying circuit performs high-low level detection on the received noise-reduced and amplified video signal and then transmits the video signal to the impedance matching circuit; the impedance matching circuit is connected with the AD conversion module.
The filter circuit comprises a resistor R1, one end of a resistor R1 is connected with the video signal output end of the signal receiving module, the other end of a resistor R1 is connected with one end of a capacitor C1, and the other end of the capacitor C1 is connected with one end of a resistor R2, one end of a capacitor C2 and one end of a resistor R4 of the noise reduction circuit; the other end of the resistor R2 and the other end of the capacitor C2 are both grounded.
The noise reduction circuit comprises a resistor R4 and an operational amplifier AR1, one end of a resistor R4 is connected with one end of a capacitor C2 of the filter circuit, one end of a capacitor C3, the anode of a diode D2 and one end of a resistor R3 of the signal detection amplifying circuit, and the other end of the resistor R4 is connected with the non-inverting input end of the operational amplifier AR 1; the other end of the capacitor C3 is connected with the anode of the diode D3, the output end of the operational amplifier AR1, one end of the resistor R6 and the non-inverting input end of the operational amplifier AR2 of the signal detection amplifying circuit, the cathode of the diode D3 is connected with the cathode of the diode D2, the other end of the resistor R6 is connected with one end of the resistor R5 and the inverting input end of the operational amplifier AR1, and the other end of the resistor R5 is grounded.
The signal detection amplifying circuit comprises an operational amplifier AR2, wherein the non-inverting input end of the operational amplifier AR2 is connected with one end of a resistor R8 and the output end of an operational amplifier AR1 of the noise reduction circuit; the other end of the resistor R8 is connected with one end of a resistor R9 and the inverting input end of the operational amplifier AR2, and the other end of the resistor R9 is connected with the base electrode of the triode Q2; a collector of the triode Q2 is connected with the output end of the operational amplifier AR2, one end of the resistor R10, one end of the normally-open switch K1-1, the base of the triode Q1 and one end of the inductor L1 of the impedance matching circuit, an emitter of the triode Q2 is grounded through a capacitor C4, and the other end of the resistor R10 is connected with the non-inverting input end of the operational amplifier AR 2; the collector of the triode Q1 is connected with the cathode of the diode D1 and one end of the relay K1, the emitter of the triode Q1 is connected with the power supply VCC through the resistor R7, and the other end of the relay K1 and the anode of the diode D1 are both grounded; the other end of the normally open switch K1-1 is connected with one end of a resistor R3, and the other end of the resistor R3 is connected with one end of a resistor R4 of the noise reduction circuit.
The impedance matching circuit comprises an inductor L1, one end of the inductor L1 is connected with the output end of an operational amplifier AR2 of the signal detection amplifying circuit, the other end of the inductor L1 is connected with one end of a capacitor C5 and the AD conversion module, and the other end of the capacitor C5 is grounded.
The utility model has the advantages that:
the filtering circuit performs clutter filtering on the received video signal to provide guarantee for amplification of a subsequent video signal; the noise reduction circuit applies the operational amplifier AR1, the diode D2 and the diode D3 to perform noise reduction and amplification processing on the filtered video signal, so that the signal-to-noise ratio is improved while the video signal is amplified, the anti-interference capability of the video signal is improved, and the purity of the video signal is ensured; the signal detection amplifying circuit receives the video signal subjected to noise reduction and amplification, the operational amplifier AR2 is adopted to further amplify the video signal and simultaneously carry out high and low level detection on the video signal, when the triode Q1 is conducted, the fact that the video signal is still weak and the normally open switch K1-1 is closed is indicated, the video signal output by the operational amplifier AR2 is fed back to the noise reduction circuit to be amplified again, when the triode Q2 is conducted, the fact that the video signal is strong, the conducting voltage of the triode Q2 is utilized to carry out voltage reduction processing on the amplitude of the video signal is indicated, so that the finally output video signal can be ensured to be more stable, and clear imaging of a monitoring host is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
The utility model provides a video monitoring device of transformer substation, as shown in fig. 1, video monitoring device includes filter circuit, the circuit of making an uproar falls, signal detection amplifier circuit and impedance matching circuit, filter circuit's input is connected with the output of signal reception module, filter circuit's output and the input of the circuit of making an uproar falls are connected, the output of the circuit of making an uproar falls and is connected with signal detection amplifier circuit's input, signal detection amplifier circuit's output is connected with impedance matching circuit's input, impedance matching circuit's output and AD conversion module are connected, and the input of the circuit of making an uproar falls is connected with signal detection amplifier circuit's output. The filtering circuit receives the video signal transmitted by the signal receiving module, filters the video signal to keep a useful signal and ensure the purity of the input signal, and transmits the filtered video signal to the noise reduction circuit; the noise reduction circuit performs noise reduction amplification processing on the filtered video signal and then transmits the processed video signal to the signal detection amplification circuit, and the signal detection amplification circuit performs high-low level detection on the received noise-reduced and amplified video signal and then transmits the detected video signal to the impedance matching circuit.
The filter circuit comprises a resistor R1, one end of a resistor R1 is connected with the video signal output end of the signal receiving module, the other end of a resistor R1 is connected with one end of a capacitor C1, and the other end of the capacitor C1 is connected with one end of a resistor R2, one end of a capacitor C2 and one end of a resistor R4 of the noise reduction circuit; the other end of the resistor R2 and the other end of the capacitor C2 are both grounded. The resistor R1, the resistor R2, the capacitor C1 and the capacitor C2 form a band-pass filter, other clutter signals outside the frequency band where the video signal is located can be filtered, and powerful guarantee is provided for amplification of the subsequent video signal.
The noise reduction circuit comprises a resistor R4 and an operational amplifier AR1, one end of a resistor R4 is connected with one end of a capacitor C2, one end of a capacitor C3, the anode of a diode D2 and one end of a resistor R3 of the signal detection amplifying circuit, and the other end of the resistor R4 is connected with the non-inverting input end of the operational amplifier AR 1; the other end of the capacitor C3 is connected with the anode of the diode D3, the output end of the operational amplifier AR1, one end of the resistor R6, and the non-inverting input end of the operational amplifier AR2 of the signal detection amplifying circuit, the cathode of the diode D3 is connected with the cathode of the diode D2, the other end of the resistor R6 is connected with one end of the resistor R5 and the inverting input end of the operational amplifier AR1, and the other end of the resistor R5 is grounded, wherein one end of the capacitor C2 serves as the output end of the filter circuit and also serves as the input end of the noise reduction circuit and the feedback end of the signal detection amplifying circuit. The noise reduction circuit can improve the signal-to-noise ratio while amplifying the video signal, reduce the noise in the video signal and enhance the anti-interference performance of the signal.
The signal detection amplifying circuit comprises an operational amplifier AR2, wherein the non-inverting input end of the operational amplifier AR2 is connected with one end of a resistor R8 and the output end of an operational amplifier AR1 of the noise reduction circuit; the other end of the resistor R8 is connected with one end of a resistor R9 and the inverting input end of the operational amplifier AR2, and the other end of the resistor R9 is connected with the base electrode of the triode Q2; a collector of the triode Q2 is connected with the output end of the operational amplifier AR2, one end of the resistor R10, one end of the normally-open switch K1-1, the base of the triode Q1 and one end of the inductor L1 of the impedance matching circuit, an emitter of the triode Q2 is grounded through a capacitor C4, and the other end of the resistor R10 is connected with the non-inverting input end of the operational amplifier AR 2; the collector of the triode Q1 is connected with the cathode of the diode D1 and one end of the relay K1, the emitter of the triode Q1 is connected with the power supply VCC through the resistor R7, and the other end of the relay K1 and the anode of the diode D1 are both grounded; the other end of the normally open switch K1-1 is connected with one end of a resistor R3, and the other end of the resistor R3 is connected with one end of a resistor R4 of the noise reduction circuit. The diode D1 is a freewheeling diode and protects the relay K1, and the relay K1 controls the normally open switch K1-1. The triode Q1 is conducted at a low level, when the triode Q1 is conducted, the video signal output by the operational amplifier AR2 is still weak, the electric appliance K1 is powered after the triode Q1 is conducted, the normally open switch K1-1 is closed, and the video signal is fed back to one end of the resistor R4 of the noise reduction circuit through the resistor R3 to be amplified again; the triode Q2 is conducted at a high level, the conduction of the triode Q2 shows that the video signal is strong, and the amplitude of the video signal is reduced by utilizing the conduction voltage of Q2, so that the stability of the finally output video signal is ensured.
The impedance matching circuit comprises an inductor L1, one end of the inductor L1 is connected with the output end of an operational amplifier AR2 of the signal detection amplifying circuit, the other end of the inductor L1 is connected with one end of a capacitor C5 and the AD conversion module, and the other end of the capacitor C5 is grounded.
The filter circuit in the utility model adopts the band-pass filter composed of the resistor R1, the resistor R2, the capacitor C1 and the capacitor C2 to carry out clutter filtering on the received video signal, thereby providing guarantee for the amplification of the subsequent video signal; the noise reduction circuit applies the operational amplifier AR1, the diode D2 and the diode D3 to perform noise reduction and amplification processing on the filtered video signal, and improves the signal-to-noise ratio while amplifying the video signal; the signal detection amplifying circuit receives the video signal subjected to noise reduction and amplification, the operational amplifier AR2 is adopted to further amplify the video signal and simultaneously carry out high and low level detection on the video signal, when the triode Q1 is conducted, the fact that the video signal is still weak and the normally open switch K1-1 is closed is shown, the video signal output by the operational amplifier AR2 is fed back to the noise reduction circuit to carry out amplification processing again, when the triode Q2 is conducted, the fact that the video signal is strong, the conducting voltage of the triode Q2 is utilized to carry out voltage reduction processing on the amplitude of the video signal is shown, and therefore the finally output video signal can be ensured to be more stable.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The video monitoring device of the transformer substation is characterized by comprising a filter circuit, a noise reduction circuit, a signal detection and amplification circuit and an impedance matching circuit, wherein the filter circuit receives a video signal transmitted by a signal receiving module, filters the video signal and transmits the video signal to the noise reduction circuit; the noise reduction circuit performs noise reduction amplification on the filtered video signal and then transmits the video signal to the signal detection amplifying circuit, and the signal detection amplifying circuit performs high-low level detection on the received noise-reduced and amplified video signal and then transmits the video signal to the impedance matching circuit; the impedance matching circuit is connected with the AD conversion module.
2. The video monitoring device of the substation according to claim 1, wherein the filter circuit comprises a resistor R1, one end of the resistor R1 is connected with the video signal output end of the signal receiving module, the other end of the resistor R1 is connected with one end of a capacitor C1, and the other end of the capacitor C1 is connected with one end of a resistor R2, one end of a capacitor C2 and one end of a resistor R4 of the noise reduction circuit; the other end of the resistor R2 and the other end of the capacitor C2 are both grounded.
3. The video monitoring device of the substation according to claim 1, wherein the noise reduction circuit comprises a resistor R4 and an operational amplifier AR1, one end of the resistor R4 is connected to one end of a capacitor C2 of the filter circuit, one end of a capacitor C3, the anode of a diode D2, and one end of a resistor R3 of the signal detection amplifying circuit, and the other end of the resistor R4 is connected to the non-inverting input end of the operational amplifier AR 1; the other end of the capacitor C3 is connected with the anode of the diode D3, the output end of the operational amplifier AR1, one end of the resistor R6 and the non-inverting input end of the operational amplifier AR2 of the signal detection amplifying circuit, the cathode of the diode D3 is connected with the cathode of the diode D2, the other end of the resistor R6 is connected with one end of the resistor R5 and the inverting input end of the operational amplifier AR1, and the other end of the resistor R5 is grounded.
4. The video monitoring device of the substation according to claim 1, wherein the signal detection amplifying circuit comprises an operational amplifier AR2, a non-inverting input terminal of the operational amplifier AR2 is connected with one end of a resistor R8 and an output terminal of an operational amplifier AR1 of the noise reduction circuit; the other end of the resistor R8 is connected with one end of a resistor R9 and the inverting input end of the operational amplifier AR2, and the other end of the resistor R9 is connected with the base electrode of the triode Q2; a collector of the triode Q2 is connected with the output end of the operational amplifier AR2, one end of the resistor R10, one end of the normally-open switch K1-1, the base of the triode Q1 and one end of the inductor L1 of the impedance matching circuit, an emitter of the triode Q2 is grounded through a capacitor C4, and the other end of the resistor R10 is connected with the non-inverting input end of the operational amplifier AR 2; the collector of the triode Q1 is connected with the cathode of the diode D1 and one end of the relay K1, the emitter of the triode Q1 is connected with the power supply VCC through the resistor R7, and the other end of the relay K1 and the anode of the diode D1 are both grounded; the other end of the normally open switch K1-1 is connected with one end of a resistor R3, and the other end of the resistor R3 is connected with one end of a resistor R4 of the noise reduction circuit.
5. The video monitoring device of the substation according to claim 1, wherein the impedance matching circuit comprises an inductor L1, one end of the inductor L1 is connected to an output end of an operational amplifier AR2 of the signal detection amplifying circuit, the other end of the inductor L1 is connected to one end of a capacitor C5 and the AD conversion module, and the other end of the capacitor C5 is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120425184.1U CN214045845U (en) | 2021-02-26 | 2021-02-26 | Video monitoring device of transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120425184.1U CN214045845U (en) | 2021-02-26 | 2021-02-26 | Video monitoring device of transformer substation |
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| Publication Number | Publication Date |
|---|---|
| CN214045845U true CN214045845U (en) | 2021-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120425184.1U Active CN214045845U (en) | 2021-02-26 | 2021-02-26 | Video monitoring device of transformer substation |
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| CN (1) | CN214045845U (en) |
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- 2021-02-26 CN CN202120425184.1U patent/CN214045845U/en active Active
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