CN118191394B - Electronic current-voltage sensor circuit, measuring method and structure thereof - Google Patents
Electronic current-voltage sensor circuit, measuring method and structure thereof Download PDFInfo
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- 239000004020 conductor Substances 0.000 claims abstract description 66
- 230000006698 induction Effects 0.000 claims abstract description 66
- 238000005259 measurement Methods 0.000 claims abstract description 50
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims description 18
- 238000005538 encapsulation Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 230000005294 ferromagnetic effect Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 230000005674 electromagnetic induction Effects 0.000 description 3
- 230000005291 magnetic effect Effects 0.000 description 3
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002887 superconductor Substances 0.000 description 1
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The application relates to the field of current and voltage detection instruments, in particular to an electronic current and voltage sensor circuit, a measuring method and a structure thereof, which comprise a power DY for providing power supply input; the current acquisition module receives power supply input of the power source DY and acquires induction current of the tested conductor MT; the current measuring device PA is used for detecting the induction current acquired by the current acquisition module to obtain detection current; the voltage acquisition module is used for acquiring the induction voltage of the tested conductor MT; and the voltage measuring device PV is used for detecting the induced voltage acquired by the voltage acquisition module to obtain a detection voltage. The application has the effects of reducing the volume, simplifying the circuit and canceling the limitation of ferromagnetic saturation on the measurement range.
Description
Technical Field
The application relates to the field of current and voltage detection instruments, in particular to an electronic current and voltage sensor circuit, a measuring method and a structure thereof.
Background
If one-time high voltage and high current measurement is required, a voltage transformer or a current transformer with an iron core is generally adopted to measure a measured conductor, the measured conductor is passively measured through an electromagnetic induction principle, and for a direct current loop, components such as a voltage divider and a current divider are also required, so that the volume is large, the circuit is complex, the alternating current and the direct current cannot be commonly used, and the iron core is provided with the iron core, so that the iron core has the limitation of ferromagnetic saturation, and the measurement range is limited.
Disclosure of Invention
In order to solve the problem of limitation of the measurement range, the application provides an electronic current-voltage sensor circuit, a measurement method and a structure thereof.
The application provides an electronic current-voltage sensor circuit, which adopts the following technical scheme:
An electronic current-voltage sensor circuit comprising:
a power source DY for providing a power input;
The current acquisition module receives power supply input of the power source DY and acquires induction current of the tested conductor MT;
The current measuring device PA is used for detecting the induction current acquired by the current acquisition module to obtain detection current;
the voltage acquisition module is used for acquiring the induction voltage of the tested conductor MT;
and the voltage measuring device PV is used for detecting the induced voltage acquired by the voltage acquisition module to obtain a detection voltage.
Through adopting above-mentioned technical scheme, provide initiative power supply input through power DY, detect initiative power supply input's electric current earlier, then with the detected current that obtains when follow-up measured conductor MT circular telegram subtracts, can obtain the size of the electric current that measured conductor MT switched on, realize active initiative measurement, alternating current direct current is general, cancel the iron core, there is not ferromagnetic saturation's restriction, measuring range is wider, and cancel components and parts such as shunt, bleeder, iron core, the volume is littleer, do benefit to lightweight, miniaturization, more be applicable to intelligent, digital application scenario.
Optionally, the current acquisition module includes hollow induction coil RL, current reference resistance IR, power binding post DZ1, current binding post DZ2, power DY electricity is connected on the power binding post DZ1, current measuring device PA electricity is connected on current binding post DZ2, hollow induction coil RL with current reference resistance IR electricity is connected power binding post DZ1 with form the return circuit between the current binding post DZ2, hollow induction coil RL is used for carrying out the collection of induced current to the conductor MT that is surveyed.
Through adopting above-mentioned technical scheme, carry out electromagnetic induction to the conductor MT that is surveyed through hollow induction coil RL, and owing to there is not the iron core, so induced current is less, but less induced current through with power DY's initiative power supply input stack to make things convenient for current measuring device PA's detection, realized that there is not the iron core still can normally detect, cancelled ferromagnetic saturation to the restriction of measuring range.
Optionally, the voltage acquisition module includes voltage induction polar plate VG, voltage measurement resistance VR, electric capacity CV, voltage binding post DZ3, the voltage measurement device PV electricity is connected on the voltage binding post DZ3, voltage measurement resistance VR electricity is connected on the voltage induction polar plate VG, voltage induction polar plate VG is used for carrying out induction voltage to the conductor MT that is surveyed and gathers, electric capacity CV connects in parallel on the voltage measurement resistance VR, voltage measurement resistance VR electricity is connected for on the voltage binding post DZ3 voltage measurement device PV carries out voltage detection.
Through adopting above-mentioned technical scheme, carry out induction collection induced voltage through voltage induction polar plate VG to the voltage of survey conductor MT, convenient and fast has realized electric current, voltage acquisition integration.
The application provides a measuring method of an electronic current-voltage sensor, which adopts the following technical scheme:
a method of measuring an electronic current-voltage sensor, comprising the steps of:
when no current passes through the tested conductor MT, the power source DY actively applies power supply input, and a reference current value is obtained through measurement of the current measurement device PA;
Setting a reference 0 instruction of the current measurement device PA by the reference current value;
When the tested conductor MT has a current to be tested to pass through, the hollow induction coil RL generates an induction current, and the current measuring device PA measures the measured current value;
And determining an induced current value through the measured current value, the reference 0 indication and a preset reference coefficient threshold value.
By adopting the technical scheme, the probability of occurrence of the phenomenon that induced current is too small to trigger detection of the current measuring device PA is reduced through the power supply input actively applied by the power source DY.
Optionally, the method further comprises the following steps:
presetting an interference time threshold and an interference fluctuation threshold;
The power DY starts to be supplied with power and input for timing to obtain a timing value, and if the timing value is within the range of the interference time threshold, the reference current value fluctuates;
determining a current fluctuation value through the reference current value, if the current fluctuation value is in the range of the interference fluctuation threshold value, waiting for the current fluctuation value to be smaller than the interference fluctuation threshold value, and setting the reference current value at the moment to the current measurement device PA according to a reference 0 instruction;
And the voltage measurement device PV is set with reference 0 instruction by using the detected voltage detected by the voltage measurement device PV as a reference voltage value.
By adopting the technical scheme, the probability that the measured conductor MT with small resistance and large cutting magnetic induction line area generates induced current due to active power supply of the power source DY and influences the reference current value and the reference voltage value is reduced, and the stability is improved.
Optionally, the method further comprises the following steps:
Presetting a stabilization time threshold;
if the timing value is within the range of the interference time threshold, the reference current value fluctuates, and then a stable time value is obtained by starting timing from the fluctuation of the reference current value, and when the current fluctuation value is smaller than the interference time threshold, the stable time value is reset to zero;
and if the stable time value exceeds the range of the stable time threshold value, the current fluctuation value is not smaller than the interference fluctuation threshold value, and an alarm signal is output to a user.
By adopting the technical scheme, if the stability is not recovered within the time of the stability time threshold, the fault of the tested conductor MT is indicated, for example, the poor contact of the tested conductor MT in a circuit thereof causes the unstable internal resistance when the current conduction section of the tested conductor MT for cutting the magnetic induction line to generate the induction current is large, so that the situation that the interference current is large and small is caused, and a user is timely reminded.
Optionally, after the current fluctuation value is smaller than the interference fluctuation threshold value, the method further includes the following steps:
Determining an interference current value through the reference current value and the output current value of the power DY;
determining a heating internal resistance value of the tested conductor MT through the interference current value and the detection voltage;
When the tested conductor MT passes through the current, the heating value of the tested conductor MT is determined according to the induction current value and the heating internal resistance value, and if the heating value exceeds a preset heating threshold, an alarm signal is output to a user.
Through adopting above-mentioned technical scheme, through the conductor MT that is surveyed before the circular telegram, through interfering current to calculate the internal resistance value that generates heat of conductor MT that is surveyed, then can calculate after circular telegram and obtain the heat that the conductor MT that is surveyed produced when circular telegram, if overheated then reminds the user, reduces the probability that causes the damage to electronic type current voltage sensor.
The application provides a structure of an electronic current-voltage sensor, which adopts the following technical scheme:
The utility model provides an electronic type current-voltage sensor's structure, includes insulating encapsulation shell JYK, installation base, insulating encapsulation shell JYK with the installation base centre gripping is on the conductor MT that is surveyed, current acquisition module with voltage acquisition module all inlays and establishes in insulating encapsulation shell JYK, hollow induction coil RL with voltage induction polar plate VG is on a parallel with the surface of conductor MT that is surveyed.
Through adopting above-mentioned technical scheme, carry out the centre gripping to the conductor MT that is surveyed through insulating encapsulation shell JYK and installation base, also with hollow induction coil RL with voltage induction polar plate VG stabilizes on the conductor MT that is surveyed simultaneously, through insulating encapsulation shell JYK to current acquisition module with voltage acquisition module plays the guard action, reduce high voltage on the conductor MT that is surveyed, heavy current direct conduction to current acquisition module with on the voltage acquisition module to lead to current acquisition module with the probability that voltage acquisition module is impaired improves stability, security.
In summary, the present application includes at least one of the following beneficial technical effects:
1. active measurement is realized, the alternating current and direct current are universal, the iron core is cancelled, the limitation of ferromagnetic saturation is avoided, and the measurement range is wider.
2. Components such as a shunt, a voltage divider, an iron core and the like are omitted, the size is smaller, the light weight and the miniaturization are facilitated, and the intelligent and digital electronic device is more suitable for intelligent and digital application scenes.
Drawings
Fig. 1 is a circuit schematic diagram of an electronic current-voltage sensor circuit in embodiment 1 of the present application.
Fig. 2 is a flow chart of a measuring method of an electronic current-voltage sensor in embodiment 1 of the application.
Fig. 3 is a schematic diagram of a busbar type structure of an electronic current-voltage sensor in embodiment 1 of the present application.
Fig. 4 is a schematic cross-sectional view taken along line A-A in fig. 3.
Fig. 5 is a schematic cross-sectional view taken along line B-B in fig. 3.
Fig. 6 is a schematic view of a cable type structure.
Fig. 7 is a schematic cross-sectional view taken along line C-C of fig. 6.
Fig. 8 is a schematic cross-sectional view taken along line D-D in fig. 6.
Fig. 9 is a flow chart of a measuring method of an electronic current-voltage sensor in embodiment 2 of the application.
Fig. 10 is a flow chart of step S3.
Fig. 11 is a flow chart of step S4.
Reference numerals illustrate: 1. a current collection module; 11. a voltage acquisition module; 2. and (5) installing a base.
Detailed Description
The application is described in further detail below with reference to fig. 1-11.
The embodiment 1 of the application discloses an electronic current-voltage sensor circuit. Referring to fig. 1, the electronic current-voltage sensor circuit includes a power source DY for providing a power input to achieve active measurement, a current collection module 1 for collecting current, a current measurement device PA for measuring the collected current, a voltage collection module 11 for collecting voltage, and a voltage measurement device PV for measuring the collected voltage.
Referring to fig. 1, the current collecting module 1 includes an air core induction coil RL, a current reference resistor IR, a power connection terminal DZ1, and a current connection terminal DZ2, where the power connection terminal DZ1 and the current connection terminal DZ2 each include a wire inlet end and a wire outlet end, a current direction points to the wire inlet end in the current collecting module 1, and a current direction points to the wire outlet end outside the current collecting module 1. The positive pole electricity of power DY is connected on the inlet wire end of power binding post DZ1, the inlet wire end electricity of power binding post DZ1 is connected on the one end of hollow induction coil RL, electric current reference resistance IR establishes ties between the other end of hollow induction coil RL and the outlet wire end of current binding post DZ2, the outlet wire end electricity of current binding post DZ2 is connected on the inlet current end of current measuring device PA, the outlet wire end electricity of current measuring device PA is connected on the inlet wire end of current binding post DZ2, the inlet wire end electricity of current binding post DZ2 is connected on the outlet wire end of power binding post DZ1, the outlet wire end electricity of power binding post DZ1 is connected on the negative pole of power DY. The power supply is characterized by further comprising an overvoltage protector JB, wherein one end of the overvoltage protector JB is electrically connected between the power supply wiring terminal DZ1 and the positive electrode of the power supply DY, and the other end of the overvoltage protector JB is grounded or connected with a zero line. The hollow induction coil RL is used for collecting induction current of the tested conductor MT, the current measuring device PA can obtain detection current by adopting an instrument with a current detection function and display the detection current for a user to check, for example, an ammeter, and can also be matched with a processor and a database to have data processing capability.
The processor may include a central processing unit such as a CPU or an MPU, or a host system including hardware or software, which is built with the CPU or the MPU as a core. After the meter has a processor, people can freely control the metering device by programming so as to operate according to the wish of people. The processor may control local metering, remote communication, etc. via an internal protocol. Internal protocols broadly refer to all protocols within the same meter or within the same system that enable mutual communication or linking, including: human-machine interaction protocol, software/hardware (interface) protocol, chip Bus (C-Bus) protocol, internal Bus (I-Bus) protocol, etc. With the development of integrated circuit technology, some protocols belonging to external buses (E-Bus) are also attributed to internal protocols after the external buses (E-Bus) are integrated into a chip.
Referring to fig. 1, the voltage acquisition module 11 includes a voltage sensing plate VG, a voltage measuring resistor VR, a capacitor CV, and a voltage connection terminal DZ3, where the voltage connection terminal DZ3 includes an incoming line end and an outgoing line end. The both ends of voltage measurement device PV are connected at voltage binding post DZ 3's inlet wire end and are qualified for the next round of competitions respectively, voltage measurement resistor VR's one end electricity is connected on voltage induction polar plate VG's output, voltage measurement resistor VR's the other end ground connection or connect the zero line, electric capacity CV connects on voltage measurement resistor VR's both ends, voltage measurement resistor VR's both ends are still connected on voltage binding post DZ 3's both ends respectively electricity respectively, voltage induction polar plate VG is used for carrying out the induced voltage to the conductor MT that is surveyed, voltage measurement resistor VR electricity is connected on voltage binding post DZ3 carries out voltage detection with voltage measurement device PV, in this embodiment, voltage measurement device PV can adopt the instrument that has voltage detection function to obtain the detected voltage and show for the user to look over, for example the voltmeter.
The embodiment 1 of the application discloses a measuring method of an electronic current-voltage sensor. Referring to fig. 2, the measuring method of the electronic current-voltage sensor includes the steps of:
S1, when no current passes through a conductor MT to be measured, a power source DY actively applies power supply input, and a reference current value is obtained through measurement of a current measuring device PA;
s11, setting a reference 0 instruction of the current measuring device PA through a reference current value;
S12, when a to-be-measured current flows through the to-be-measured conductor MT, the hollow induction coil RL generates induction current, and the current measuring device PA measures the measurement current value;
s13, determining a sensing current value through measuring the current value, a reference 0 indication and a preset reference coefficient threshold value.
Detailed: if the reference current value is 5A, if the measured current value is 6A, and the reference coefficient threshold is 10, the induced current value is (6-5) ×10=10a, (6-5) is the difference between the measured current value and the reference current value, that is, the current increased after the measured conductor MT is energized and before the energization, and the reference coefficient threshold is a multiple of the difference between the induced current and the actual current conducted in the measured conductor MT, for example, the actual current conducted in the measured conductor MT is 10A, and the induced current generated by electromagnetic induction may be only 1A, so that the induced current needs to be multiplied by a certain multiple to be the actual current.
The embodiment 1 of the application discloses a structure of an electronic current-voltage sensor. Referring to fig. 3,4 and 5, the structure of the electronic current-voltage sensor includes an insulating package housing JYK and a mounting base 2, the insulating package housing JYK and the mounting base 2 are clamped on a tested conductor MT, insulating resin is poured into the insulating package housing JYK and the mounting base 2, a current collecting module 1 and a voltage collecting module 11 are embedded into the insulating package housing JYK, the positions of the current collecting module 1 and the voltage collecting module 11 are fixed and insulated by pouring the insulating resin, and a hollow induction coil RL and a voltage induction pole plate VG are parallel to the outer surface of the tested conductor MT. The measured conductor MT is embedded in the side wall of the insulating package housing JYK facing the mounting base 2, and the shape of the side wall of the insulating package housing JYK facing the mounting base 2 is different according to the type of the measured conductor MT, and the hollow induction coil RL and the voltage induction polar plate VG are also adaptively changed.
Referring to fig. 3, fig. 4 and fig. 5, in one case, the measured conductor MT is a busbar, the side wall of the insulating package housing JYK facing the mounting base 2 is a square groove, the measured conductor MT is embedded into the square groove, and the hollow induction coil RL and the voltage induction polar plate VG are linearly extended and distributed at this time, so that the hollow induction coil RL and the voltage induction polar plate VG are parallel to the bottom wall of the square groove;
Referring to fig. 6, 7 and 8, another case is that the measured conductor MT is a cable, at this time, the side wall of the insulating package housing JYK facing the mounting base 2 is a semicircular arc slot, at the same time, the side wall of the mounting base 2 facing the insulating package housing JYK is also provided with a semicircular arc slot, the measured conductor MT is embedded in the semicircular arc slots of the insulating package housing JYK and the mounting base 2, and at this time, the hollow induction coil RL and the voltage induction polar plate VG are in arc-shaped extending distribution and are kept parallel to the bottom wall of the semicircular arc slot.
The embodiment 2 of the application discloses a measuring method of an electronic current-voltage sensor. Referring to fig. 9, the measuring method of the electronic current-voltage sensor includes the steps of:
S2, presetting an interference time threshold and an interference fluctuation threshold;
S21, starting to input power supply to the power source DY for timing to obtain a timing value, and if the timing value is within the range of the interference time threshold, generating fluctuation of the reference current value;
S22, determining a current fluctuation value through a reference current value, if the current fluctuation value is in the range of the interference fluctuation threshold value, waiting for the current fluctuation value to be smaller than the interference fluctuation threshold value, and setting the reference current value to the current measuring device PA according to the reference 0 instruction;
s23, the voltage measurement device PV is set with reference 0 instruction by the reference voltage value using the detection voltage detected by the voltage measurement device PV as the reference voltage value.
Detailed: the interference time threshold is set as a, the interference fluctuation threshold is set as b, when the power DY starts to supply power, the timing value starts to count from zero, when the timing value is less than a, the reference current value fluctuates, the current fluctuation value is obtained through calculation by the fluctuation of the reference current value, if the reference current value fluctuates from c to d, namely, the reference current value is [ c, d ], the circuit fluctuation value is d-c, if (d-c) < b), the current fluctuation value is in the range of the interference fluctuation threshold, the fluctuation is indicated to supply power to the power DY so as to generate induced current on the tested conductor MT, the induced current on the tested conductor MT is caused to generate induced current on the hollow induction coil RL, thus generating interference, and the situation is less generated, but if the cutting magnetic induction line area of the tested conductor MT is larger, the induced current is easy to generate, the diameter of the tested conductor MT is larger, the internal resistance is smaller, the length of the tested conductor MT is shorter, for example, silver bars with shorter length, or special materials of resistance (superconductors in the ideal case of exclusive or even at normal temperature) are needed, thus the interference is required to be stably measured, and the measurement device is required to wait for the measurement of the reference current to be stabilized, and the measurement device is set for 0.
Referring to fig. 10, the method further comprises the steps of:
s3, presetting a stabilization time threshold;
S31, if the timing value is within the range of the interference time threshold, the reference current value fluctuates, the stable time value is obtained by starting timing from the fluctuation of the reference current value, and when the current fluctuation value is smaller than the interference fluctuation threshold, the stable time value is reset to zero;
s32, if the stable time value exceeds the range of the stable time threshold, the current fluctuation value is not smaller than the interference fluctuation threshold, and an alarm signal is output to a user.
Detailed: and setting the stable time threshold value as e, generating fluctuation at the reference current value, starting timing the stable time value, and if the stable time value is more than e, indicating that abnormality exists if the current fluctuation value is not less than b, and outputting an alarm signal to a user for reminding.
Referring to fig. 11, the method further comprises the steps of:
S4, determining an interference current value through the reference current value and the output current value of the power DY;
s41, determining a heating internal resistance value of the tested conductor MT through the interference current value and the detection voltage;
S42, when the tested conductor MT passes through the current, the heating value of the tested conductor MT is determined through the induction current value and the heating internal resistance value, and if the heating value exceeds a preset heating threshold value, an alarm signal is output to a user.
Detailed: the magnitude of the induced current generated on the hollow induction coil RL caused by the induced current on the detected conductor MT is also calculated through the reference current value and the output current value of the power source DY, namely, the interference current value, the heating internal resistance value is the internal resistance of the detected conductor MT, the induced current value acquired when the detected conductor MT is electrified is calculated to obtain the heating value, and if the heating value is too large, an alarm signal is output to a user for reminding.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (5)
1. An electronic current-voltage sensor circuit, comprising:
a power source DY for providing a power input;
the current acquisition module (1) receives power supply input of the power source DY and acquires induction current of the tested conductor MT;
The current measuring device PA is used for detecting the induction current acquired by the current acquisition module (1) to obtain detection current;
The voltage acquisition module (11) is used for acquiring the induction voltage of the tested conductor MT;
The voltage measuring device PV is used for detecting the induced voltage acquired by the voltage acquisition module (11) to obtain a detected voltage;
the current acquisition module (1) comprises an air core induction coil (RL);
when no current passes through the tested conductor MT, the power source DY actively applies power supply input, and a reference current value is obtained through measurement of the current measurement device PA;
Setting a reference 0 instruction of the current measurement device PA by the reference current value;
When the tested conductor MT has a current to be tested to pass through, the hollow induction coil RL generates an induction current, and the current measuring device PA measures the measured current value;
Determining an induced current value through the measured current value, the reference 0 indication and a preset reference coefficient threshold;
presetting an interference time threshold and an interference fluctuation threshold;
The power DY starts to be supplied with power and input for timing to obtain a timing value, and if the timing value is within the range of the interference time threshold, the reference current value fluctuates;
determining a current fluctuation value through the reference current value, if the current fluctuation value is in the range of the interference fluctuation threshold value, waiting for the current fluctuation value to be smaller than the interference fluctuation threshold value, and setting the reference current value at the moment to the current measurement device PA according to a reference 0 instruction;
Setting a reference 0 instruction of the voltage measurement device PV by using the detection voltage detected by the voltage measurement device PV as a reference voltage value;
Presetting a stabilization time threshold;
if the timing value is within the range of the interference time threshold, the reference current value fluctuates, and then a stable time value is obtained by starting timing from the fluctuation of the reference current value, and when the current fluctuation value is smaller than the interference time threshold, the stable time value is reset to zero;
and if the stable time value exceeds the range of the stable time threshold value, the current fluctuation value is not smaller than the interference fluctuation threshold value, and an alarm signal is output to a user.
2. An electronic current-voltage sensor circuit according to claim 1, characterized in that: the current acquisition module (1) comprises a hollow induction coil RL, a current reference resistor IR, a power supply wiring terminal DZ1 and a current wiring terminal DZ2, wherein the power supply DY is electrically connected to the power supply wiring terminal DZ1, the current measurement device PA is electrically connected to the current wiring terminal DZ2, the hollow induction coil RL and the current reference resistor IR are electrically connected between the power supply wiring terminal DZ1 and the current wiring terminal DZ2 to form a loop, and the hollow induction coil RL is used for acquiring induction current of a tested conductor MT.
3. An electronic current-voltage sensor circuit according to claim 2, characterized in that: the voltage acquisition module (11) comprises a voltage induction polar plate VG, a voltage measurement resistor VR, a capacitor CV and a voltage wiring terminal DZ3, wherein the voltage measurement device PV is electrically connected to the voltage wiring terminal DZ3, the voltage measurement resistor VR is electrically connected to the voltage induction polar plate VG, the voltage induction polar plate VG is used for carrying out induction voltage acquisition on a measured conductor MT, the capacitor CV is connected in parallel to the voltage measurement resistor VR, and the voltage measurement resistor VR is electrically connected to the voltage wiring terminal DZ3 so as to enable the voltage measurement device PV to carry out voltage detection.
4. A method for measuring an electronic current-voltage sensor using an electronic current-voltage sensor circuit according to claim 1, characterized in that after the current fluctuation value is smaller than the disturbance fluctuation threshold value, the method further comprises the steps of:
Determining an interference current value through the reference current value and the output current value of the power DY;
determining a heating internal resistance value of the tested conductor MT through the interference current value and the detection voltage;
When the tested conductor MT passes through the current, the heating value of the tested conductor MT is determined according to the induction current value and the heating internal resistance value, and if the heating value exceeds a preset heating threshold, an alarm signal is output to a user.
5. An electronic current-voltage sensor structure, an electronic current-voltage sensor circuit according to claim 3, characterized in that: including insulating encapsulation shell JYK, installation base (2), insulating encapsulation shell JYK with installation base (2) centre gripping is on surveyed conductor MT, current acquisition module (1) with voltage acquisition module (11) all inlay and establish insulating encapsulation shell JYK is interior, hollow induction coil RL with voltage induction polar plate VG is on a parallel with the surface of surveyed conductor MT.
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| CN202410300007.9A CN118191394B (en) | 2024-03-15 | 2024-03-15 | Electronic current-voltage sensor circuit, measuring method and structure thereof |
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| CN202410300007.9A CN118191394B (en) | 2024-03-15 | 2024-03-15 | Electronic current-voltage sensor circuit, measuring method and structure thereof |
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| CN118191394B true CN118191394B (en) | 2024-08-20 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2687680Y (en) * | 2003-10-24 | 2005-03-23 | 西安西开高压电气股份有限公司 | Composite electronic current-voltage sensor |
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| CN2687680Y (en) * | 2003-10-24 | 2005-03-23 | 西安西开高压电气股份有限公司 | Composite electronic current-voltage sensor |
| CN115267377A (en) * | 2022-06-30 | 2022-11-01 | 深圳供电局有限公司 | Line monitoring device and method thereof |
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