CN108828293A - A kind of voltage measuring apparatus - Google Patents
A kind of voltage measuring apparatus Download PDFInfo
- Publication number
- CN108828293A CN108828293A CN201810638939.9A CN201810638939A CN108828293A CN 108828293 A CN108828293 A CN 108828293A CN 201810638939 A CN201810638939 A CN 201810638939A CN 108828293 A CN108828293 A CN 108828293A
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- voltage
- module
- measuring apparatus
- measurement module
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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
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/04—Voltage dividers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/08—Circuits for altering the measuring range
- G01R15/09—Autoranging circuits
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention discloses a kind of voltage measuring apparatus comprising voltage measurement module and protective module, for voltage measurement module for measuring to line voltage distribution, the range of voltage measurement module is variable；Protective module be used for judge line voltage distribution whether be more than voltage measurement module maximum measuring range; when line voltage distribution is no more than the maximum range of voltage measurement module; line voltage distribution input voltage measurement module is measured, and the line voltage distribution for being more than maximum measuring range is measured.Line voltage distribution is measured by the way that voltage measurement module is arranged; when line voltage distribution is no more than the maximum range of voltage measurement module; line voltage distribution input voltage measurement module is measured; and the line voltage distribution for being more than maximum measuring range is measured; solves the problem for lacking that high voltage circuit is protected and voltage measurement range is lower in resistor voltage divider circuit.
Description
Technical field
The present invention relates to induced voltage technical field more particularly to a kind of voltage measuring apparatus.
Background technique
In the test of line influence voltage measurement, in view of using capacitance partial pressure measurement technology, exist such as volume compared with
It is big and when facing low induced voltage can not normal use the problem of, in the prior art, directly surveyed using multimeter
The mode for measuring and taking pure resistance to divide carries out the measurement of line influence voltage.
For this purpose, the measuring range that the prior art is just inevitably present line influence voltage is lower, the low pressure member such as resistance
Lack high voltage protective in device use process, is easily crossed the problem of high induction voltage punctures.
Summary of the invention
The present invention provides a kind of voltage measuring apparatus, it is intended to solve to lack high electricity in resistor voltage divider circuit in the prior art
Volt circuit protection, and can solve the lower problem of voltage measurement range.
The present invention provides a kind of voltage measuring apparatus comprising：
Voltage measurement module, for measuring to line voltage distribution, the range of the voltage measurement module is variable；
Protective module, for judge the line voltage distribution whether be more than the voltage measurement module maximum measuring range,
When the line voltage distribution is no more than the maximum range of the voltage measurement module, the line voltage distribution is inputted into the voltage and is surveyed
Amount module measures, and measures to the line voltage distribution for being more than the maximum measuring range.
The embodiment of the present invention measures line voltage distribution by the way that voltage measurement module is arranged, the range of voltage measurement module
It is variable, and be arranged protective module judge line voltage distribution whether be more than voltage measurement module maximum measuring range, in line voltage distribution
No more than voltage measurement module maximum range when, line voltage distribution input voltage measurement module is measured, to be more than maximum
The line voltage distribution of measuring range measures.Lack high voltage circuit protection, Yi Ji electricity in resistor voltage divider circuit to solve
Press the lower problem of measuring range, and measuring range can free switching according to the actual situation, while flexibility is high, also ensure that
Measurement result is more accurate.
Detailed description of the invention
Technical solution in order to illustrate the embodiments of the present invention more clearly, below will be to needed in embodiment description
Attached drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of voltage measuring apparatus provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of voltage measuring apparatus provided in an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of the protective module of voltage measuring apparatus provided in an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of the judgment module of voltage measuring apparatus provided in an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of another voltage measuring apparatus provided in an embodiment of the present invention；
Fig. 6 is a kind of structural schematic diagram of the first end of voltage measuring apparatus provided in an embodiment of the present invention；
Fig. 7 is a kind of structural schematic diagram of the second end of voltage measuring apparatus provided in an embodiment of the present invention；
Fig. 8 is a kind of structural schematic diagram of the conduction module of voltage measuring apparatus provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
It should be appreciated that ought use in this specification and in the appended claims, term " includes " and "comprising" instruction
Described feature, entirety, step, operation, the presence of element and/or component, but one or more of the other feature, whole is not precluded
Body, step, operation, the presence or addition of element, component and/or its set.
It is also understood that mesh of the term used in this description of the invention merely for the sake of description specific embodiment
And be not intended to limit the present invention.As description of the invention and it is used in the attached claims, unless on
Other situations are hereafter clearly indicated, otherwise " one " of singular, "one" and "the" are intended to include plural form.
It will be further appreciated that the term "and/or" used in description of the invention and the appended claims is
Refer to any combination and all possible combinations of one or more of associated item listed, and including these combinations.
Referring to Fig. 1, Fig. 1 is a kind of structural schematic diagram of voltage measuring apparatus provided in an embodiment of the present invention comprising
Voltage measurement module 800 and protective module 900, voltage measurement module 800 is for measuring line voltage distribution, voltage measurement mould
The range of block 800 is variable；Protective module 900 is used to judge whether line voltage distribution to be more than that the maximum of voltage measurement module 800 measures
Range, protective module 900 input electricity when line voltage distribution is no more than the maximum range of voltage measurement module 800, by line voltage distribution
Pressure measurement module 800 measures, and measures to the line voltage distribution for being more than maximum measuring range.
Specifically, line voltage distribution is measured by the way that voltage measurement module 800 is arranged, the amount of voltage measurement module 800
Journey is variable, and be arranged protective module 900 judge line voltage distribution whether be more than voltage measurement module 800 maximum measuring range,
When line voltage distribution is no more than the maximum range of voltage measurement module 800, line voltage distribution input voltage measurement module 800 is surveyed
Amount, to the line voltage distribution for being more than maximum measuring range, protective module 900 is directly measured.To solve electric resistance partial pressure electricity
Lack the problem that high voltage circuit is protected and voltage measurement range is lower in road, and measuring range can be according to the actual situation
Free switching while flexibility is high, also ensures that measurement result is more accurate.
In one embodiment, voltage measurement module 800 include voltmeter V and with the concatenated division module of voltmeter V, point
Die block includes the partial pressure branch of multiple parallel connections, and partial pressure branch road is equipped with the scheduled divider resistance R of internal resistance, every partial pressure branch road
Switch S equipped with control route opening and closing.
As shown in Fig. 2, specifically, by taking three partial pressure branches as an example comprising three switch S11-S13 and two resistances
It is worth fixed resistance R11 and R12, line voltage distribution is directly accessed voltmeter V when only switch S11 closure, and measuring range is most at this time
It is small；When only switch S12 is closed, line voltage distribution accesses voltmeter V after resistance R11 and R12 partial pressure, and measuring range is most at this time
Greatly；When only switch S13 is closed, line voltage distribution accesses voltmeter V after resistance R11 partial pressure.Assuming that the internal resistance of voltmeter is R,
R11=9R, R12=90R, voltage measurement module 800 in this way measuring range when switch S12 is closed is maximum, is that voltmeter is practical
100 times of measuring range need to only use the voltmeter of 0~50V range that can measure the voltage reading to be measured of 0~5000V at this time
Number, i.e., in only switch S12 closure, if the reading of voltmeter V is K, the actual value of voltage to be measured is 100K, is only being opened
When closing S11 closure, the reading of voltmeter V is the actual value of voltage to be measured, in only switch S13 closure, if voltmeter V
Reading is K, then the actual value of voltage to be measured is 10K.In the concrete realization, the internal resistance of resistance R11 and R12 can be according to actual needs
Self-setting.When the parameter (internal resistance, range) of the voltmeter used is fixed, the partial pressure branch of maximum internal resistance is connected first
Road, to obtain the reading of voltmeter, by taking above-described embodiment as an example, maximum measuring range is 0~5000V, secondly measuring range
For 0~500V, the smallest measuring range is 0~50V, if the reading of voltmeter is K, actual voltage value 100K, if discovery
100K < 500V, then replace the measuring range of voltage measurement module 800 to 0~500V, because the range of voltmeter is certain
, 10 times of ranges are reduced, then the opposite precision for improving the practical voltage readings to be measured of acquisition.Similarly, in subsequent measurements, when
When 10K < 50V, measuring range is switched into 0~50V to carry out the acquisition of voltage readings to be measured, at this time using to be voltage
The direct out interface of Table V itself measures, the accuracy of the voltage value that measures reading also highest.In the concrete realization, voltage is surveyed
The switching for measuring module 800 can add automatic control module to carry out automatic identification and switch by the way that digital processing module is arranged, some
The voluntarily judgement simultaneously manual switching of operator can also be passed through in simple machine.The item number of specifically used partial pressure branch and
The resistance value of the divider resistance of use can also sets itself according to actual needs.
In one embodiment, the internal resistance of divider resistance is the integral multiple of voltmeter internal resistance.
Specifically, can be facilitated in the reading for reading voltmeter, quickly using the resistance of the integral multiple of voltmeter internal resistance
Intuitively obtain the actual numerical value of voltage to be measured.
As shown in figure 3, in one embodiment, protective module 900 includes judgment module 100 and conduction module 200, mould is judged
Block 100 includes the first end 110 being connected with voltage input end, and with the first end 110 is spaced apart can opposite the
Opposite the second mobile end 120 is done in one end 110, and the output end of the second end 120 is connected with for reading in measurement route
First monitoring device 130 of discharge current size and read the of clearance distance between the first end 110 and the second end 120
Two monitoring device (not shown)s, conduction module 200 are used to judge that induced voltage is less than voltage measurement in judgment module 100
Circuit is constantly conducted to voltage measurement module 800 by the maximum range of module 800.
Specifically, input voltage in interface from figure inputs, when measuring to input voltage, first by judgment module
Whether 100 pairs of induced voltages are more than that predetermined voltage threshold judges, can be according to the maximum range actually used in design
The voltage value range that can measure of voltmeter design, such as the range of existing voltmeter is 0~5000V, and at this time setting is default
Voltage threshold is 5000V, then the voltage within 5000V can be measured directly by voltmeter, 0~5000V range
Voltmeter be connected to voltage measurement module 800, for judge induced voltage no more than predetermined voltage threshold in judgment module 100
It when 5000V, is connected by conduction module 200, the numerical value of voltage is measured from out interface access voltage measurement module 800.When
When judgment module 100 determines induced voltage and is more than predetermined voltage threshold 5000V, by the big voltage measurement in judgment module 100
Module measures big voltage, can for example by using the principle of gap discharge, gap between two conductive rods it is defeated
When outlet monitors scheduled current, the reading of induced voltage is known roughly by the spacing in gap.
Referring to fig. 4, specifically, judgment module 100 includes the first end 110 and the second end 120, the first end 110 with
Spaced apart between second end 120, this distance is the distance of the safe enough retained when accessing corresponding voltage,
When voltage is accessed in first end 110, by the way that relatively-movable second end 120 towards the movement of the first end 110, is supervised simultaneously
The discharge current size for surveying the output end of the second end 120, can be preset the reading of a discharge current, can be by discharging back
The ammeter (131 in such as figure, being contained in the first monitoring device 130) of road is intuitively known, and inputs in advance in input end
If the equal input voltage of voltage threshold, the first end 110 when the reading of ammeter reaches default value on record discharge loop
With the clearance distance (can be read by the second monitoring device of setting) of the second end 120, the clearance distance measured at this time is i.e.
For judgment criteria of the judgment module 100 when reaching default discharge current reading, it is denoted as gap threshold, it is subsequent when judging again, the
After reaching predetermined current reading, clearance distance and the gap threshold measured according to the second monitoring device is compared one monitoring device
Right, if clearance distance is greater than gap threshold, input voltage value is greater than predetermined voltage threshold, passes through the clearance distance actually obtained
Induced voltage numerical value is roughly calculated out, if clearance distance is not more than gap threshold, input voltage value is not more than predeterminated voltage threshold
Input voltage can be forwarded to voltage measurement module 800 by conduction module 200 and carry out precise measurement by value.Meanwhile it can be first
One single-phase plug-in strip (132 in such as figure) is set on the current measurement circuit of monitoring device 130, carrys out cut-offfing for control circuit.
As shown in Figure 2 and Figure 5, further, the device of the present embodiment can be subjected to multiple parallel connections, such as three groups of surveys in figure
Device parallel connection is measured, M is the combination of three protective modules 900 in figure, can measure three voltage input point in1~in3 simultaneously, corresponding
The input of conduction module 200 there are three output point out1~out3, each output point connects one group of voltage measurement module 800, often
A voltage measurement module 800 include corresponding voltmeter (V1-V3 in Fig. 2), resistance (R11-R31, R12-R32 in Fig. 2) and
Switch ammeter of (S11-S13, S21-S23, S31-S33 in Fig. 2) each judgment module 100 with a monitoring discharge current
(A1~A3 in Fig. 5) is correspondingly provided with single-phase plug-in strip (S1~S3 in Fig. 5) on each discharge circuit.Three groups can be so carried out simultaneously
Measurement can improve measurement efficiency according to the voltage swing of measurement point come accurate or rough or induced voltage numerical value.Specifically
In realization, it can be set according to actual measurement using how many groups of carry out parallel connections.
In one embodiment, the first monitoring device 130 is used for when discharge current reaches predetermined current threshold, control second
End 120 stops movement.
Specifically, when the first monitoring device 130 reading reaches predetermined current threshold, the second end 120 of control stops moving
It is dynamic, the clearance distance of the first end 110 and the second end 120, and and gap threshold are obtained by the second monitoring device at this time
It is compared, to know the initial ranges of the induced voltage of measurement.In the concrete realization, control the second end 120 movement,
Stopping and homing can be operated by automation equipment monitoring, can also pass through manual hand manipulation in some simple machines
It executes.
In one embodiment, the second monitoring device is used for when clearance distance reaches prepsetting gap distance threshold, control the
Two ends 120 stop movement.
Specifically, the second monitoring device can control gap second end head when monitoring that clearance distance reaches gap threshold
120 stop movement, if because it is pre- to illustrate that the reading of the first monitoring device 130 does not reach still in movement for the second end 120 at this time
If current threshold, then the efficiency of measuring device can be improved certainly less than predetermined voltage threshold in the induced voltage of input terminal at this time.
In one embodiment, conduction module 200 judges that induced voltage is less than predetermined voltage threshold in judgment module 100
When, the second end 120 is controlled far from the first end 110, and input voltage is conducted to voltage measurement module.
Specifically, input voltage is determined no more than after predetermined voltage threshold in judgment module 100, conduction module 200 will
Input voltage accesses voltage measurement module and carries out precise measurement, and before measuring, the control of conduction module 200 second end 120 is remote
From the first end 110 to being returned to initial position, then voltage measurement module is connected.
As shown in fig. 6, in one embodiment, the first end 110 is including firm banking 111 and is fixed on firm banking
The first gap stick 112 on 111 is detachably connected between first gap stick 112 and firm banking 111.
As shown in fig. 7, in one embodiment, the second end 120 is including mobile base 121 and is fixed on mobile base
The second gap stick 122 on 121 is detachably connected between second gap stick 122 and mobile base 121.
Specifically, to be detachably connected between the first gap stick 112 and firm banking 111 of the first end 110, Yi Ji
To be detachably connected such as being threadedly coupled, be clamped between the second gap stick 122 and mobile base 121 of two ends 120, mesh
Be the replacement for facilitating gap stick, convenient for device repair.
As shown in figure 8, in one embodiment, conduction module 200 is parallel to the voltage input end of judgment module 100, packet
Include static contact 210, moving contact 220 and for controlling the mobile device 230 mobile relative to static contact 210 of moving contact 220.
Specifically, conduction module 200 is an automatic closing device, when input voltage is no more than predetermined voltage threshold,
The mobile device 230 of conduction module 200 drives moving contact 220 mobile towards static contact 210, until moving contact 220 is inserted into stationary contact
Closed communicating in first 210 measures input voltage importing voltage measurement module.In the specific implementation, operator can also be passed through
Member manual closing come realize conduction module 200 closure conducting.
In one embodiment, elastic copper sheet (not shown) is equipped with inside static contact 210.
Specifically, elastic copper sheet is set inside static contact 210, can moving contact 220 insertion after lock, it is ensured that connection it is steady
It is qualitative, it in the concrete realization, is not limited to realize the function using elastic copper sheet, other occlusion structures or locking can also be passed through
Structure is realized.
In one embodiment, the initial spacing between the static contact 210 and moving contact 220 of conduction module 200 is not less than and sentences
Initial spacing between the first end 110 and the second end 120 of disconnected module 100.
Specifically, because the structure between the moving contact 220 of conduction module 200 and static contact 210 is similar to the first end 110
And second between end 120 as a result, if input voltage is excessive, between also being generated between moving contact 220 and static contact 210
Gap electric discharge phenomena, because the initial spacing between the first end 110 and the second end 120 be safe spacing, then by moving contact 220 with
Initial spacing between static contact 210 is arranged not less than above-mentioned safe spacing, it can be ensured that the safety of voltage measurement module 800
Property.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (10)
1. a kind of voltage measuring apparatus, which is characterized in that including：
Voltage measurement module, for measuring to line voltage distribution, the range of the voltage measurement module is variable；
Protective module, for judge the line voltage distribution whether be more than the voltage measurement module maximum measuring range, in institute
When stating maximum range of the line voltage distribution no more than the voltage measurement module, the line voltage distribution is inputted into the voltage measurement mould
Block measures, and measures to the line voltage distribution for being more than the maximum measuring range.
2. voltage measuring apparatus according to claim 1, which is characterized in that the voltage measurement module include voltmeter with
And with the concatenated division module of the voltmeter, the division module includes the partial pressure branch of multiple parallel connections, the partial pressure branch
It is equipped with the scheduled divider resistance of internal resistance, every partial pressure branch road is equipped with the switch of control route opening and closing.
3. voltage measuring apparatus according to claim 2, which is characterized in that the internal resistance of the divider resistance is the voltage
The integral multiple of table internal resistance.
4. voltage measuring apparatus according to claim 1, which is characterized in that the protective module includes judgment module and leads
Logical module, the judgment module includes the first end being connected with voltage input end, and certain with first end interval
Distance can do opposite the second mobile end relative to first end, and the output end of second end is connected with for reading
Between measuring the first monitoring device of discharge current size in route and reading between first end and second end
Stand-off distance from the second monitoring device, the conduction module is used in the judgment module judge that induced voltage is less than the voltage
Circuit is constantly conducted to the voltage measurement module by the maximum range of measurement module.
5. voltage measuring apparatus according to claim 4, which is characterized in that first monitoring device described for putting
When electric current reaches predetermined current threshold, controls second end and stop movement.
6. voltage measuring apparatus according to claim 4, which is characterized in that second monitoring device is used between described
When stand-off distance is from prepsetting gap distance threshold is reached, controls second end and stop movement.
7. voltage measuring apparatus according to claim 4, which is characterized in that first end include firm banking and
The first gap stick being fixed on the firm banking, is detachably to connect between first gap stick and the firm banking
It connects.
8. voltage measuring apparatus according to claim 4, which is characterized in that second end include mobile base and
The second gap stick being fixed in the mobile base, is detachably to connect between second gap stick and the mobile base
It connects.
9. voltage measuring apparatus according to claim 4, which is characterized in that the conduction module is parallel to the judgement mould
The voltage input end of block comprising static contact, moving contact and relative to the static contact mobile for controlling the moving contact
Mobile device.
10. voltage measuring apparatus according to claim 8, which is characterized in that the static contact of the conduction module with
Initial spacing between moving contact is not less than initial between first end and second end of the judgment module
Spacing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810638939.9A CN108828293B (en) | 2018-06-20 | 2018-06-20 | Voltage measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810638939.9A CN108828293B (en) | 2018-06-20 | 2018-06-20 | Voltage measuring device |
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| Publication Number | Publication Date |
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| CN108828293A true CN108828293A (en) | 2018-11-16 |
| CN108828293B CN108828293B (en) | 2023-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810638939.9A Active CN108828293B (en) | 2018-06-20 | 2018-06-20 | Voltage measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112782546A (en) * | 2020-12-31 | 2021-05-11 | 国家电网有限公司 | Insulator leakage current acquisition system |
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| CN112782546A (en) * | 2020-12-31 | 2021-05-11 | 国家电网有限公司 | Insulator leakage current acquisition system |
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| Publication number | Publication date |
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| CN108828293B (en) | 2023-10-13 |
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