CN104006830A - Adjusting module for acquiring signal in power transmission line monitoring system - Google Patents
Adjusting module for acquiring signal in power transmission line monitoring system Download PDFInfo
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- CN104006830A CN104006830A CN201410213647.2A CN201410213647A CN104006830A CN 104006830 A CN104006830 A CN 104006830A CN 201410213647 A CN201410213647 A CN 201410213647A CN 104006830 A CN104006830 A CN 104006830A
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Abstract
The invention discloses an adjusting module for acquiring a signal in a power transmission line monitoring system. The adjusting module comprises a primary isolating circuit, a filter circuit, a first comparator and an optoelectronic isolation circuit, wherein the primary isolating circuit comprises a first capacitor, a second capacitor and a first resistor, the first capacitor is connected with the input end of the filter circuit, one end of the first resistor and one end of the second capacitor are respectively connected with a circuit between the first capacitor and the filter circuit, and the other end of the first resistor and the other end of the second capacitor are respectively connected with the ground. The output end of the filter circuit is connected with the opposite input end of the first comparator, and the optoelectronic isolation circuit is connected with the output end of the first comparator. When the adjusting module for acquiring the signal in the power transmission line monitoring system is used, an interference signal in signal acquisition can be eliminated, and the interference signal is prevented from influencing the monitoring accuracy of the power transmission line monitoring system.
Description
Technical field
The present invention relates to Maintenance of Electric Transmission Line field, specifically the adjustment module of collection signal in power transmission line monitoring system.
Background technology
Along with the modernization development of scientific-technical progress and industrial or agricultural, living standards of the people improve constantly, and power consumption significantly rises, and mains supply security, reliability have been proposed to more and more higher requirement.Transmission line of electricity is the artery of electric system, and its running status directly determines safety and the benefit of electric system.
Monitor for the ease of the running status to transmission line of electricity, existing transmission line of electricity is generally equipped with monitoring system.Wherein, the monitoring system of existing transmission line of electricity generally comprises monitoring center and multiple monitoring terminal, monitoring center and monitoring terminal utilize GPRS communication network as information transmission network, monitoring terminal adopts obliquity sensor to carry out shaft tower inclination measurement, adopt Temperature Humidity Sensor to carry out temperature, moisture measurement, adopt wind speed, wind transducer is to wind speed, wind direction is measured, adopt again microprocessor to sensor measurement to signal collection communicate by letter and reach monitoring center and carry out analyzing and processing by GPRS after arranging, so that transmission line of electricity is carried out remote monitoring and is safeguarded in time.But, there are a large amount of undesired signals in the signal that in the monitoring terminal of existing power transmission line monitoring system, sensor reaches microprocessor, monitoring center receives the collection signal with a large amount of undesired signals can be affected it and carry out normal analyzing and processing, and then can affect normally carrying out of transmission line of electricity monitoring.
Summary of the invention
The object of the invention is to overcome power transmission line monitoring system in prior art because existing a large amount of undesired signals to affect the deficiency of monitoring accuracy, the adjustment module of collection signal in a kind of power transmission line monitoring system is provided, it is applied between the sensor and microprocessor of monitoring terminal in power transmission line monitoring system, undesired signal can be effectively eliminated, and then the accuracy of effect of signals monitoring can be avoided interference.
The present invention solves the problems of the technologies described above and is achieved through the following technical solutions: the adjustment module of collection signal in power transmission line monitoring system, comprise elementary buffer circuit, filtering circuit, the first comparer and photoelectric isolating circuit, described elementary buffer circuit comprises the first electric capacity, the second electric capacity and the first resistance, described the first electric capacity is connected with filtering circuit input end, the first resistance and the equal one end of the second electric capacity are connected on the circuit between the first electric capacity and filtering circuit input end, and the equal ground connection of both other ends; Described filtering circuit output terminal is connected with the inverting input of the first comparer, and described photoelectric isolating circuit is connected with the output terminal of the first comparer.When the present invention applies, the first electric capacity connects the signal that the other end receiving sensor of filtering circuit input end detects, the external microprocessor of photoelectric isolating circuit relatively.
Further, described filtering circuit comprises the second resistance and the 3rd electric capacity, described the second resistance two ends are connected with the first electric capacity and the first comparer inverting input respectively, and the 3rd electric capacity one end is connected on the circuit between the second resistance and the first comparer inverting input, its other end ground connection.Filtering circuit of the present invention adopts simple RC circuit to carry out filtering, is convenient to realize.
Further, the adjustment module of collection signal in power transmission line monitoring system, also comprises the 4th electric capacity, and described the first comparer is connected with power supply, and described the 4th electric capacity one end is connected on the circuit between the first comparer and power supply, its other end ground connection.
Further, described photoelectric isolating circuit comprises photoelectrical coupler, the 3rd resistance, the 5th resistance and the 8th resistance, described the 3rd resistance two ends connect respectively the 4th pin and power supply of photoelectrical coupler, the 5th resistance two ends are connected with the second pin of the first comparator output terminal and photoelectrical coupler respectively, the 8th resistance two ends connect respectively the first pin and the power supply of photoelectrical coupler, the three-prong ground connection of described photoelectrical coupler.The present invention is in the time of concrete application, and photoelectric isolating circuit is specifically by the external microprocessor of the 4th pin of photoelectrical coupler.
Further, the adjustment module of collection signal in power transmission line monitoring system, also comprise the 4th resistance, the 6th resistance and the 7th resistance, described the 4th resistance two ends are connected with in-phase input end and the output terminal of the first comparer respectively, the 6th resistance one end is connected on the first comparator output terminal, its other end external power supply, the 7th resistance one end is connected on the circuit between the first comparer in-phase input end and the 4th resistance, its other end ground connection.
In sum, the present invention has following beneficial effect: (1) the present invention includes elementary buffer circuit, filtering circuit, the first comparer and photoelectric isolating circuit, when applying, the present invention passes through the first Capacitor apart direct current signal of elementary buffer circuit, AC signal is inputted the first comparer after circuit filtering after filtering, the first comparer pulse signals carries out inputting photoelectric isolating circuit after shaping, the in the situation that photoelectric isolating circuit being isolated at electricity, transmit signal taking light as medium, input and output circuit is isolated, the effectively noise in Inhibitory signal transmitting procedure, eliminate the interference of ground loop, so, when applying, the present invention can avoid the microprocessor of monitoring terminal in power transmission line monitoring system to affect the accuracy of monitoring to monitoring center's transmission undesired signal, ensure normally carrying out of transmission line of electricity monitoring.
(2) elementary buffer circuit of the present invention also comprises the first resistance and the second electric capacity, wherein, the first resistance and the equal one end of the second electric capacity are connected to the connection between the first electric capacity and the second resistance, both equal ground connection of the other end, when the present invention applies, the first resistance allows the second electric capacity have the process of charging and discharging, so, can remove high-frequency signal by the second electric capacity, further reduce undesired signal.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of a specific embodiment of the present invention.
In accompanying drawing, the corresponding name of Reference numeral is called: C1, the first electric capacity, C2, the second electric capacity, C3, the 3rd electric capacity, C4, the 4th electric capacity, VCC, power supply, R1, the first resistance, R2, the second resistance, R3, the 3rd resistance, R4, the 4th resistance, R5, the 5th resistance, R6, the 6th resistance, R7, the 7th resistance, R8, the 8th resistance, A1, the first comparer, OC1, photoelectrical coupler.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is done to detailed description further, but embodiments of the present invention are not limited to this.
Embodiment:
As shown in Figure 1, the adjustment module of collection signal in power transmission line monitoring system, comprise elementary buffer circuit, filtering circuit, the first comparer A1 and photoelectric isolating circuit, wherein, in the present embodiment, the model of the first comparer A1 is LM2903, the power pin that it is provided with the ground pin of ground connection and meets power supply VCC.Elementary buffer circuit comprises the first capacitor C 1, the second capacitor C 2 and the first resistance R 1, the first capacitor C 1 is connected with filtering circuit input end, the first resistance R 1 and second capacitor C 2 both equal one end are connected on the circuit between the first capacitor C 1 and filtering circuit input end, and the equal ground connection of both other ends.In the present embodiment, the capacitance of the first capacitor C 1 is 0.1uF, and the capacitance of the second capacitor C 2 is 0.01uF, and the resistance of the first resistance R 1 is 10K Ω.The filtering circuit output terminal of the present embodiment is connected with the inverting input of the first comparer A1, and photoelectric isolating circuit is connected with the output terminal of the first comparer A1.The present embodiment also comprises that the capacitance of the 4th capacitor C 4, the four capacitor C 4 is 0.1uF, and the 4th capacitor C 4 one end are connected on the circuit between the first comparer A1 and power supply VCC, its other end ground connection.
The filtering circuit of the present embodiment comprises the second resistance R 2 and the 3rd capacitor C 3, wherein, the resistance of the second resistance R 2 is 10K Ω, the capacitance of the 3rd capacitor C 3 is 0.001 uF, the second resistance R 2 two ends are respectively as the input and output side of filtering circuit, the second resistance R 2 two ends are connected with the first capacitor C 1 and the first comparer A1 inverting input respectively, and the 3rd capacitor C 3 one end are connected on the circuit between the second resistance R 2 and the first comparer A1 inverting input, its other end ground connection.
The present embodiment also comprises the 4th resistance R 4, the 6th resistance R 6 and the 7th resistance R 7, and wherein, the resistance of the 4th resistance R 4 is 4 K Ω, and the 6th resistance R 6 and both resistances of the 7th resistance R 7 are 3.3 K Ω.The 4th resistance R 4 two ends are connected with in-phase input end and the output terminal of the first comparer A1 respectively, the 6th resistance R 6 one end are connected on the first comparer A1 output terminal, its other end external power supply VCC, the 7th resistance R 7 one end are connected on the circuit between the first comparer A1 in-phase input end and the 4th resistance R 4, its other end ground connection.
The photoelectric isolating circuit of the present embodiment comprises photoelectrical coupler OC1, the 3rd resistance R 3, the 5th resistance R 5 and the 8th resistance R 8, wherein, in the present embodiment, the model of photoelectrical coupler OC1 is PS2501-1, it is provided with four pins, the resistance of the 5th resistance R 5 is 4 K Ω, and the 3rd resistance R 3 and both resistances of the 8th resistance R 8 are 1 K Ω.Photoelectric isolating circuit is connected with the first comparer A1 output terminal by the 5th resistance R 5, the other end that the 5th resistance R 5 connects the first comparer A1 end is relatively connected with the second pin of photoelectrical coupler OC1, the 3rd resistance R 3 two ends connect respectively the 4th pin and the power supply VCC of photoelectrical coupler OC1, the 8th resistance R 8 two ends connect respectively the first pin and the power supply VCC of photoelectrical coupler OC1, the three-prong ground connection of photoelectrical coupler OC1.In the present embodiment, the 3rd resistance R 3, the 6th resistance R 6, the 8th resistance R 8 and the first comparer A1 are powered by same power supply VCC.
When the present embodiment application, the first capacitor C 1 connects the other end external sensor of the second resistance R 2 ends relatively, the microprocessor of monitoring terminal in the external power transmission line monitoring system of the 4th pin of photoelectrical coupler OC1, the signal that sensor gathers is handed over every straight-through through the first capacitor C 1, remove high-frequency signal by the second capacitor C 2, carry out signal isolation, last input microprocessor through the first comparer A1 shaping and photoelectrical coupler OC1 successively again.
As mentioned above, can realize preferably the present invention.
Claims (5)
1. the adjustment module of collection signal in power transmission line monitoring system, it is characterized in that, comprise elementary buffer circuit, filtering circuit, the first comparer (A1) and photoelectric isolating circuit, described elementary buffer circuit comprises the first electric capacity (C1), the second electric capacity (C2) and the first resistance (R1), described the first electric capacity (C1) is connected with filtering circuit input end, the first resistance (R1) and both equal one end of the second electric capacity (C2) are connected on the circuit between the first electric capacity (C1) and filtering circuit input end, and the equal ground connection of both other ends; Described filtering circuit output terminal is connected with the inverting input of the first comparer (A1), and described photoelectric isolating circuit is connected with the output terminal of the first comparer (A1).
2. the adjustment module of collection signal in power transmission line monitoring system according to claim 1, it is characterized in that, described filtering circuit comprises the second resistance (R2) and the 3rd electric capacity (C3), described the second resistance (R2) two ends are connected with the first electric capacity (C1) and the first comparer (A1) inverting input respectively, the 3rd electric capacity (C3) one end is connected on the circuit between the second resistance (R2) and the first comparer (A1) inverting input, its other end ground connection.
3. the adjustment module of collection signal in power transmission line monitoring system according to claim 1, it is characterized in that, also comprise the 4th electric capacity (C4), described the first comparer (A1) is connected with power supply (VCC), described the 4th electric capacity (C4) one end is connected on the circuit between the first comparer (A1) and power supply (VCC), its other end ground connection.
4. the adjustment module of collection signal in power transmission line monitoring system according to claim 3, it is characterized in that, described photoelectric isolating circuit comprises photoelectrical coupler (OC1), the 3rd resistance (R3), the 5th resistance (R5) and the 8th resistance (R8), described the 3rd resistance (R3) two ends connect respectively the 4th pin and the power supply (VCC) of photoelectrical coupler (OC1), the 5th resistance (R5) two ends are connected with the second pin of the first comparer (A1) output terminal and photoelectrical coupler (OC1) respectively, the 8th resistance (R8) two ends connect respectively the first pin and the power supply (VCC) of photoelectrical coupler (OC1), the three-prong ground connection of described photoelectrical coupler (OC1).
5. according to the adjustment module of collection signal in the power transmission line monitoring system described in any one in claim 1～4, it is characterized in that, also comprise the 4th resistance (R4), the 6th resistance (R6) and the 7th resistance (R7), described the 4th resistance (R4) two ends are connected with in-phase input end and the output terminal of the first comparer (A1) respectively, the 6th resistance (R6) one end is connected on the first comparer (A1) output terminal, its other end external power supply (VCC), the 7th resistance (R7) one end is connected on the circuit between the first comparer (A1) in-phase input end and the 4th resistance (R4), its other end ground connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410213647.2A CN104006830A (en) | 2014-05-21 | 2014-05-21 | Adjusting module for acquiring signal in power transmission line monitoring system |
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| CN201410213647.2A CN104006830A (en) | 2014-05-21 | 2014-05-21 | Adjusting module for acquiring signal in power transmission line monitoring system |
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| CN104006830A true CN104006830A (en) | 2014-08-27 |
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Application publication date: 20140827 |
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