CN108802480B - Induced voltage measuring device - Google Patents
Induced voltage measuring device Download PDFInfo
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- CN108802480B CN108802480B CN201810638968.5A CN201810638968A CN108802480B CN 108802480 B CN108802480 B CN 108802480B CN 201810638968 A CN201810638968 A CN 201810638968A CN 108802480 B CN108802480 B CN 108802480B
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- induced voltage
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- 238000005259 measurement Methods 0.000 claims abstract description 64
- 238000012806 monitoring device Methods 0.000 claims description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000012544 monitoring process Methods 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention discloses an induced voltage measuring device, which comprises: the circuit comprises a first measuring module, a second measuring module and a conduction module, wherein the first measuring module is used for judging whether the induced voltage in the circuit exceeds a preset voltage threshold value or not and measuring the induced voltage exceeding the preset voltage threshold value; the second measurement module is used for measuring the induced voltage when the voltage does not exceed the preset voltage threshold; the conduction module is used for conducting the circuit to the second measurement module when the first measurement module judges that the induced voltage does not exceed the preset voltage threshold. By judging whether the induced voltage in the circuit exceeds a preset voltage threshold, the induced voltage exceeding the preset voltage threshold and the induced voltage not exceeding the preset voltage threshold are separately measured, and a conduction module is arranged to convert the high-low induced voltage into a corresponding measurement circuit for measurement, so that the problem that the high-voltage circuit protection is lacking in the resistor voltage dividing circuit in the prior art and the problem that the high-line induced voltage cannot be measured can be solved.
Description
Technical Field
The invention relates to the technical field of induced voltage, in particular to an induced voltage measuring device.
Background
In the prior art, the measurement of the line induced voltage mainly uses a resistor voltage dividing circuit, and the induced voltage value is calculated by measuring the current flowing through a voltage dividing resistor in the resistor voltage dividing circuit.
Because the line induced voltage value can not be predicted in a range, if the induced voltage is too high, the voltage dividing resistor in the prior art is easy to break down, and a large potential safety hazard exists, so that the measurement of the line induced voltage which is too high can not be realized, namely the measurement range of the line induced voltage in the prior art is limited.
Disclosure of Invention
The invention provides an induced voltage measuring device, which aims to solve the problems that a resistor voltage dividing circuit in the prior art lacks of high-voltage circuit protection and the induced voltage of a high line cannot be measured.
The invention provides an induced voltage measuring device, which comprises:
the first measurement module is used for judging whether the induced voltage in the circuit exceeds a preset voltage threshold value or not and measuring the induced voltage exceeding the preset voltage threshold value;
the second measurement module is used for measuring the induced voltage when the preset voltage threshold value is not exceeded;
and the conduction module is used for conducting the circuit to the second measurement module when the first measurement module judges that the induced voltage does not exceed the preset voltage threshold.
According to the embodiment of the invention, whether the induced voltage in the circuit exceeds the preset voltage threshold value is judged, the induced voltage exceeding the preset voltage threshold value and the induced voltage not exceeding the preset voltage threshold value are separately measured, and the conducting module is arranged to convert the high-low induced voltage into the corresponding measuring circuit for measurement, so that the problem that the high-voltage circuit protection is absent in the resistor voltage dividing circuit in the prior art, and the problem that the high-line induced voltage cannot be measured can be solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an induced voltage measurement device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a first measurement module of an induced voltage measurement apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of another induced voltage measurement apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a first end of an induced voltage measurement apparatus according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a second end of an induced voltage measurement apparatus according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a conducting module of an induced voltage measurement device according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an induced voltage measurement device according to an embodiment of the present invention, which includes a first measurement module 100, a second measurement module (not shown in the drawings, connected to an out interface for connecting to a voltmeter with an existing range to measure line voltage), and a turn-on module 200. The first measurement module 100 is configured to determine whether an induced voltage in the circuit exceeds a preset voltage threshold, and measure the induced voltage exceeding the preset voltage threshold; the second measurement module is used for measuring the induced voltage when the voltage does not exceed the preset voltage threshold; the conducting module 200 is configured to conduct the circuit to the second measuring module when the first measuring module 100 determines that the induced voltage does not exceed the preset voltage threshold.
Specifically, when the input voltage is measured, the first measurement module 100 determines whether the induced voltage exceeds a preset voltage threshold, and when the first measurement module 100 determines that the induced voltage does not exceed the preset voltage threshold, the first measurement module is turned on by the turn-on module 200 to measure the voltage value according to the voltage value range that can be measured by the voltmeter with the maximum range that is actually adopted. When the first measurement module 100 determines that the induced voltage exceeds the preset voltage threshold value of 5000V, the large voltage is measured by the large voltage measurement module in the first measurement module 100, and when the preset current is monitored at the output end of the gap between the two conductive rods by adopting the principle of gap discharge, the reading of the induced voltage can be roughly known through the gap distance.
Specifically, whether the induced voltage in the circuit exceeds a preset voltage threshold value is judged, the induced voltage exceeding the preset voltage threshold value and the induced voltage not exceeding the preset voltage threshold value are separately measured, and a conduction module is arranged to convert the high-low induced voltage into a corresponding measurement circuit for measurement, so that the problem that the high-voltage circuit protection is absent in the resistor voltage divider circuit in the prior art and the problem that the high-line induced voltage cannot be measured can be solved.
As shown in fig. 3, further, the apparatus of this embodiment may be connected in parallel, for example, three sets of measuring apparatuses in the drawing are connected in parallel, three voltage input points in1 to in3 may be measured simultaneously, three output points out1 to out3 are input to the corresponding conducting module 200, each first measuring module 100 is provided with an ammeter (A1 to A3 in the drawing) for monitoring the discharge current, and each discharge circuit is correspondingly provided with a single-phase knife switch (S1 to S3 in the drawing). Therefore, three groups of measurements can be simultaneously carried out, the voltage value of the accurate or rough or induced voltage can be obtained according to the voltage of the measurement point, and the measurement efficiency is improved.
As shown in fig. 2, in one embodiment, the first measurement module 100 includes a first end 110 connected to the voltage input terminal, and a second end 120, which is spaced from the first end 110 by a distance and is capable of moving oppositely relative to the first end 110, and a first monitoring device 130 for reading the magnitude of the discharge current in the measurement line and a second monitoring device (not shown) for reading the gap distance between the first end and the second end are connected to the output end of the second end 120.
Specifically, the first measurement module 100 includes a first end 110 and a second end 120, where a certain distance is spaced between the first end 110 and the second end 120, where the distance is a distance that is sufficient to be safe when a corresponding voltage is connected to the first end 110, when the first end 110 is connected to the voltage, by moving the second end 120 that can relatively move toward the first end 110 while monitoring the magnitude of the discharge current at the output end of the second end 120, a reading of the discharge current can be preset, and can be intuitively known through an ammeter (e.g. 131 in the diagram, included in the first monitoring device 130) on the discharge circuit, and when an input voltage equal to a preset voltage threshold is input to the input end, the gap distance between the first end 110 and the second end 120 is recorded (and can be read through the second monitoring device that is set), and at this time, the measured gap distance is a judgment criterion when the first measurement module 100 reaches the preset discharge current reading, and when the subsequent judgment is performed, the first monitoring device performs a comparison between the gap distance measured by the second monitoring device and the gap distance after the preset current reading, if the gap distance is greater than the preset voltage, and the actual gap distance is greater than the actual gap distance, and if the gap distance is greater than the preset voltage and the actual gap distance is greater than the actual gap distance and is not greater than the preset voltage. Meanwhile, a single-phase knife (S in the figure) may be disposed on the current measurement circuit of the first monitoring device 130 to control the opening and closing of the circuit.
In one embodiment, the first monitoring device 130 is configured to control the second terminal 120 to stop moving when the discharge current reaches a preset current threshold.
Specifically, when the reading of the first monitoring device 130 reaches the preset current threshold, the second end 120 is controlled to stop moving, and the gap distance between the first end 110 and the second end 120 is obtained by the second monitoring device and compared with the gap threshold, so that the preliminary range of the measured induced voltage is known. In particular implementations, controlling the movement, stopping, and returning to the home position of the second head 120 may be performed by automated device monitoring, or may be performed by manual operations in some simple apparatus.
In one embodiment, the second monitoring device is configured to control the second end 120 to stop moving when the gap distance reaches a preset gap distance threshold.
Specifically, the second monitoring device may control the second gap end 120 to stop moving when the gap distance reaches the gap threshold value, because if the second gap end 120 is still moving, it indicates that the reading of the first monitoring device 130 does not reach the preset current threshold value, the induced voltage at the input end is necessarily smaller than the preset voltage threshold value at this time, so that the efficiency of the measuring device may be improved.
In an embodiment, the conducting module 200 controls the second terminal 120 to be far away from the first terminal 110 and conducts the input voltage to the second measuring module when the first measuring module 100 determines that the induced voltage does not exceed the preset voltage threshold.
Specifically, after the first measurement module 100 determines that the input voltage does not exceed the preset voltage threshold, the conduction module 200 switches the input voltage into the second measurement module to perform accurate measurement, and before the measurement, the conduction module 200 controls the second terminal 120 to return to the initial position away from the first terminal 110, and then conducts the second measurement module. .
As shown in fig. 4, in an embodiment, the first end 110 includes a fixing base 111 and a first gap bar 112 fixed on the fixing base 111, where the first gap bar 112 is detachably connected to the fixing base 111.
In one embodiment, as shown in fig. 5, the second end 120 includes a moving base 121 and a second gap bar 122 fixed on the moving base 121, where the second gap bar 122 is detachably connected to the moving base 121.
Specifically, the first gap bar 112 of the first end 110 is detachably connected to the fixed base 111, and the second gap bar 122 of the second end 120 is detachably connected to the movable base 121, for example, by threaded connection, clamping connection, etc., so as to facilitate replacement of the gap bar and maintenance of the device.
As shown in fig. 6, in an embodiment, the conducting module 200 is connected in parallel to the voltage input end of the first measurement module 100, and includes a fixed contact 210, a moving contact 220, and a moving device 230 for controlling the moving contact 220 to move relative to the fixed contact 210.
Specifically, the conducting module 200 is an automatic closing device, and when the input voltage does not exceed the preset voltage threshold, the moving device 230 of the conducting module 200 drives the moving contact 220 to move towards the fixed contact 210 until the moving contact 220 is inserted into the fixed contact 210 to be closed and communicated, and the input voltage is led into the second measuring module for measurement. In particular implementations, the closed conduction of the conduction module 200 may also be achieved by manual closing by an operator.
In one embodiment, the static contact 210 is internally provided with an elastic copper sheet (not shown in the figure).
Specifically, the elastic copper sheet is disposed inside the fixed contact 210, and can be locked after the movable contact 220 is inserted, so as to ensure the stability of connection.
In an embodiment, the initial spacing between the fixed contact 210 and the moving contact 220 of the conducting module 200 is not smaller than the initial spacing between the first end 110 and the second end 120 of the first measuring module 100.
Specifically, since the structure between the moving contact 220 and the fixed contact 210 of the conductive module 200 is similar to that between the first terminal 110 and the second terminal 120, if the input voltage is too large, a gap discharge phenomenon is generated between the moving contact 220 and the fixed contact 210, and since the initial interval between the first terminal 110 and the second terminal 120 is a safety interval, the initial interval between the moving contact 220 and the fixed contact 210 is set to be not less than the safety interval, so that the safety of the second measurement module can be ensured.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (7)
1. An induced voltage measurement apparatus, comprising:
the first measurement module is used for judging whether the induced voltage in the circuit exceeds a preset voltage threshold value or not and measuring the induced voltage exceeding the preset voltage threshold value;
the second measurement module is used for measuring the induced voltage when the preset voltage threshold value is not exceeded;
the conduction module is used for conducting the circuit to the second measurement module when the first measurement module judges that the induced voltage does not exceed the preset voltage threshold;
the first measuring module comprises a first end head connected with the voltage input end and a second end head which is separated from the first end head by a certain distance and can move oppositely relative to the first end head, and the output end of the second end head is connected with a first monitoring device for reading the magnitude of the discharge current in the measuring circuit and a second monitoring device for reading the gap distance between the first end head and the second end head;
the first end head comprises a fixed base and a first gap rod fixed on the fixed base, and the first gap rod is detachably connected with the fixed base;
the second end head comprises a movable base and a second gap rod fixed on the movable base, and the second gap rod is detachably connected with the movable base.
2. The induced voltage measurement apparatus according to claim 1, wherein the first monitoring device is configured to control the second terminal to stop moving when the discharge current reaches a preset current threshold.
3. The induced voltage measurement apparatus according to claim 2, wherein the second monitoring device is configured to control the second tip to stop moving when the gap distance reaches a preset gap distance threshold.
4. The induced voltage measurement apparatus according to claim 3, wherein the turn-on module controls the second terminal to be away from the first terminal and turns on the input voltage to the second measurement module when the first measurement module determines that the induced voltage does not exceed the preset voltage threshold.
5. The induced voltage measurement apparatus of claim 1, wherein the conduction module is connected in parallel to a voltage input terminal of the first measurement module, and comprises a fixed contact, a moving contact, and a moving device for controlling the moving contact to move relative to the fixed contact.
6. The induced voltage measurement device of claim 5 wherein the stationary contact has a resilient copper sheet disposed therein.
7. The induced voltage measurement apparatus of claim 5, wherein an initial spacing between the stationary contact and the movable contact of the conduction module is not less than an initial spacing between the first end and the second end of the first measurement module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810638968.5A CN108802480B (en) | 2018-06-20 | 2018-06-20 | Induced voltage measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810638968.5A CN108802480B (en) | 2018-06-20 | 2018-06-20 | Induced voltage measuring device |
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| Publication Number | Publication Date |
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| CN108802480A CN108802480A (en) | 2018-11-13 |
| CN108802480B true CN108802480B (en) | 2024-02-06 |
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