CN108333552B - Mutual inductor homonymous end detection device - Google Patents
Mutual inductor homonymous end detection device Download PDFInfo
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- CN108333552B CN108333552B CN201810308081.XA CN201810308081A CN108333552B CN 108333552 B CN108333552 B CN 108333552B CN 201810308081 A CN201810308081 A CN 201810308081A CN 108333552 B CN108333552 B CN 108333552B
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- 238000001514 detection method Methods 0.000 title claims abstract description 16
- 238000012360 testing method Methods 0.000 claims abstract description 37
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims abstract description 14
- 238000004804 winding Methods 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims description 9
- 238000005070 sampling Methods 0.000 claims description 8
- 238000007405 data analysis Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
- G01R35/007—Standards or reference devices, e.g. voltage or resistance standards, "golden references"
Abstract
The invention provides a transformer homonymous end detection device which comprises a transformer to be detected, a test box body, a signal generation module, a test module, a power supply module and an indication module, wherein the signal generation module, the test module, the power supply module and the indication module are arranged in the test box; the signal generating module generates a signal with a certain frequency; the testing module amplifies the frequency signal generated by the signal generating module, samples, shapes and compares the output signal of the transformer to be tested to form a response signal, and sends the response signal to the indicating module; and the indication module judges the same name end of the tested transformer according to the response signal and displays the judgment result. According to the invention, the judgment result is directly displayed by transmitting the circuit signal of the judgment result to the indication module only through the circuit design, so that an operator does not need to have theoretical knowledge, does not need to observe the winding direction of the coil, does not need to use auxiliary instruments such as an ammeter and the like, and can identify the same-name end of the transformer.
Description
Technical Field
The invention relates to an electronic instrument technology, in particular to a detection device for the homonymous ends of a mutual inductor.
Background
The transformer is also called as an instrument transformer, and is a generic term of a current transformer and a voltage transformer. The high voltage can be changed into low voltage and the large current can be changed into small current, so that the standardization and miniaturization of the measuring instrument, the protection equipment and the automatic control equipment can be realized. Meanwhile, the mutual inductor can be used for separating a high-voltage system so as to ensure the safety of personnel and equipment. Therefore, the transformer should perform homonymous end detection when leaving the factory, so as to prevent polarity from being misplaced when winding, and then cause errors of a relay protection loop and inaccuracy of measurement data of a metering loop in subsequent use, and even endanger personal safety.
At present, the homonymous terminal judging method mainly comprises a winding method, a direct current method, an alternating current method and the like; the method requires operators to master theoretical basic knowledge to a certain extent, has high requirements on production assembly staff and debugging staff, is easy to damage components of the tested piece due to improper operation, and has long time consumption and low debugging efficiency.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the device for detecting the same-name end of the mutual inductor, which does not need to fix a test instrument in a test box, only generates a judging result circuit signal through circuit design and transmits the judging result circuit signal to an indicating module to directly display the judging result, and has simple and quick identification.
In order to achieve the above purpose, the technical scheme of the invention is to provide a transformer homonymous end detection device, which comprises a transformer to be detected, a test box body, a signal generation module, a test module, a power module and an indication module, wherein the signal generation module, the test module, the power module and the indication module are arranged in the test box; the signal generating module generates a signal with a certain frequency; the testing module amplifies the frequency signal generated by the signal generating module, samples, shapes and compares the output signal of the transformer to be tested to form a response signal, and sends the response signal to the indicating module; the indication module judges the homonymous end of the tested transformer according to the response signal and displays the judgment result; the power supply module supplies power to the signal generating module, the testing module and the indicating module; the test module comprises a signal amplifying component, a current limiting resistor R1, a current limiting resistor R2, a standard transformer, a sampling resistor Rs, a rectifying and filtering module and a voltage comparison module; the output end of the signal generation module is connected with the input end of a signal amplifying component, the output end of the signal amplifying component is respectively input to the input ends of primary windings of a standard transformer and a transformer to be tested through a current limiting resistor R1 and a current limiting resistor R2, the two transformers are connected in parallel, and the output end of the primary winding is grounded; the secondary windings of the standard transformer and the transformer to be tested are connected in series to output current signals, the current signals are connected in parallel with the sampling resistor Rs, and the current signals are converted into voltage signals and then input into the rectifying and filtering module to be changed into direct-current voltage signal input voltage comparison module, and then the direct-current voltage signal is output to the indication module.
In order to more conveniently test the same-name ends of the transformers, the preferable technical scheme is that the same-name end detection device of the transformers further comprises a measurement panel, wherein the measurement panel comprises a power key, an indication panel and a transformer jack to be tested. The measuring panel is arranged, four ports of the transformer to be measured can be directly inserted into corresponding jacks on the panel, the work of connecting the coils of the transformer to be measured into the circuit one by one is reduced, and the judgment result is prevented from being influenced by wrong connection.
In order to perform initial data analysis, remove the miscellaneous signal, obtain stable direct current voltage signal without interference, improve the accuracy, prevent the mistake from making a sound and lightening by mistake, the preferred technical scheme is, the test module still includes the data analysis module, the input of data analysis module links to each other with the output of rectifying and filtering module, and the output links to each other with the input of voltage comparison module. The data analysis module performs data sampling on the signals subjected to sampling rectification and filtering to obtain continuous maximum positive and negative peaks, obtains peak deviation data, performs analysis processing, and then transmits the stable and interference-free signals to the voltage comparison circuit to be compared with reference voltage.
In order to facilitate field operation, no external power supply is provided, and preferably, the power supply module comprises 4 dry batteries with 9V power supply voltage, and the 4 dry batteries are connected in series. The detection device is powered by the dry battery, so that the portable electric power device is convenient to carry out.
In order to more intuitively display the judgment result of the same name end, the preferable technical scheme is that the indication module is a light-emitting diode lamp and/or a buzzer. The light-emitting diode can directly emit red, yellow, blue, green, cyan, orange, purple and white light, and the light-emitting diode with a striking and dazzling color is selected to more intuitively prompt an operator to judge the same-name end of the transformer to be tested. The buzzer is a sound producing device capable of converting an electric signal into a sound signal and is used for prompting or alarming, and can intuitively prompt an operator as well as judge the same name end of the tested transformer.
The preferable technical scheme is that the signal generation module adopts an STC8F2K16S2 singlechip.
The invention has the advantages and beneficial effects that: according to the invention, the test instrument is not required to be fixed in the test box, the judging result circuit signal is only generated through the circuit design and is transmitted to the indicating module, and the judging result is directly displayed through the on-off of the LED indicating lamp or the sound and the non-sound of the buzzer, so that an operator does not need to have theoretical knowledge, observe the winding direction of a coil, and the auxiliary instrument such as an ammeter is not required, the same-name end of the transformer can be identified, the operation is simple, the judging speed is greatly improved, the shipment production time of the product is greatly shortened, the quality of the product is ensured, and the production efficiency of the product is improved.
Drawings
FIG. 1 is a schematic diagram of a device for detecting the same name end of a transformer in an embodiment of the invention;
FIG. 2 is a circuit diagram of a common-name end detection device of a transformer in an embodiment of the invention;
in the figure: 1. a signal generation module; 2. a test module; 3. a power module; 4. an indication module; 5. a voltage comparison module; 6. a test box; 7. a power button; 8. a light emitting diode lamp; 9. a buzzer; 10. and a jack of the voltage transformer to be tested.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
As shown in fig. 1 and 2, the detection device for the same name end of the mutual inductor comprises a mutual inductor to be detected, a test box body 6, a signal generation module 1, a test module 2, a power supply module 3 and an indication module 4, wherein the signal generation module 1, the test module 2, the power supply module 3 and the indication module 4 are arranged in the test box; the signal generating module 1 generates a signal with a certain frequency; the test module 2 amplifies the frequency signal generated by the signal generation module 1, then samples, shapes and compares the output signal of the transformer to be tested to form a response signal, and sends the response signal to the indication module 4; the indication module 4 judges the homonymous ends of the tested transformer according to the response signals and displays the judgment result; the power supply module 3 supplies power to the signal generation module 1, the test module 2 and the indication module 4; the test module 2 comprises a signal amplification component, a current limiting resistor R1, a current limiting resistor R2, a standard transformer, a sampling resistor Rs, a rectifying and filtering module and a voltage comparison module 5; the output end of the signal generation module is connected with the input end of a signal amplifying component, the output end of the signal amplifying component is respectively input to the input ends of primary windings of a standard transformer and a transformer to be tested through a current limiting resistor R1 and a current limiting resistor R2, the two transformers are connected in parallel, and the output end of the primary winding is grounded; the secondary windings of the standard transformer and the transformer to be tested are connected in series to output current signals, the current signals are connected in parallel with a sampling resistor Rs, and the current signals are converted into voltage signals and then input into a rectifying and filtering module to be changed into direct-current voltage signals to be input into a voltage comparison module 5, and then output to an indication module 4. The power module 3 is an external power supply; the indication module 4 is a light-emitting diode lamp 8 and a buzzer 9;
The using method of the mutual inductor homonymous terminal detection device comprises the following steps: during testing, a power plug is plugged in, a power key 7 is pressed to take electricity, four ports of a finished transformer to be tested are inserted into the jack 10 of the voltage transformer to be tested of the testing box 6, and whether the LED lamp 8 is lightened or not and whether the buzzer 9 is sounded or not are observed; when the same name end of the tested voltage transformer is the same as the same name end of the standard voltage transformer, the LED lamp 8 is on, the buzzer 9 sounds, and the quality of the tested voltage transformer is qualified; when the same name end of the tested voltage transformer is opposite to the same name end of the standard voltage transformer, the LED lamp 8 is turned off, and the buzzer 9 does not sound, so that the quality of the tested voltage transformer is unqualified.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (6)
1. The device for detecting the same name end of the mutual inductor is characterized by comprising the mutual inductor to be detected, a test box body, a signal generating module, a test module, a power module and an indication module, wherein the signal generating module, the test module, the power module and the indication module are arranged in the test box; the signal generating module generates a signal with a certain frequency; the testing module amplifies the frequency signal generated by the signal generating module, samples, shapes and compares the output signal of the transformer to be tested to form a response signal, and sends the response signal to the indicating module; the indication module judges the homonymous end of the tested transformer according to the response signal and displays the judgment result; the power supply module supplies power to the signal generating module, the testing module and the indicating module; the test module comprises a signal amplifying component, a current limiting resistor R1, a current limiting resistor R2, a standard transformer, a sampling resistor Rs, a rectifying and filtering module and a voltage comparison module; the output end of the signal generation module is connected with the input end of a signal amplifying component, the output end of the signal amplifying component is respectively input to the input ends of primary windings of a standard transformer and a transformer to be tested through a current limiting resistor R1 and a current limiting resistor R2, the two transformers are connected in parallel, and the output end of the primary winding is grounded; the secondary windings of the standard transformer and the transformer to be tested are connected in series to output current signals, the current signals are connected in parallel with the sampling resistor Rs, and the current signals are converted into voltage signals and then input into the rectifying and filtering module to be changed into direct-current voltage signal input voltage comparison module, and then the direct-current voltage signal is output to the indication module.
2. The transformer homonymous terminal detection device of claim 1, further comprising a measurement panel, wherein the measurement panel comprises a power key, an indication panel and a transformer jack to be measured.
3. The transformer homonymous terminal detection device according to claim 1, wherein the test module further comprises a data analysis module, an input end of the data analysis module is connected with an output end of the rectifying and filtering module, and an output end of the data analysis module is connected with an input end of the voltage comparison module.
4. The transformer homonymous terminal detection device according to claim 1, wherein the power supply module comprises 4 dry batteries with 9V power supply voltage, and the 4 dry batteries are connected in series.
5. The transformer homonymous terminal detection device according to claim 1, wherein the indication module is a light-emitting diode lamp and/or a buzzer.
6. The transformer homonymous terminal detection device according to claim 1, wherein the signal generation module adopts an STC8F2K16S2 type singlechip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810308081.XA CN108333552B (en) | 2018-04-08 | 2018-04-08 | Mutual inductor homonymous end detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810308081.XA CN108333552B (en) | 2018-04-08 | 2018-04-08 | Mutual inductor homonymous end detection device |
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| Publication Number | Publication Date |
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| CN108333552A CN108333552A (en) | 2018-07-27 |
| CN108333552B true CN108333552B (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810308081.XA Active CN108333552B (en) | 2018-04-08 | 2018-04-08 | Mutual inductor homonymous end detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112201125B (en) * | 2020-09-24 | 2022-06-07 | 常州信息职业技术学院 | Teaching device for visually judging homonymous terminal |
Citations (9)
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|---|---|---|---|---|
| CN86108441A (en) * | 1986-12-18 | 1988-06-29 | 中国船舶工业总公司第七研究院第七一五研究所 | Automatic mutual-inductor calibrating instrument |
| CN1580788A (en) * | 2004-05-18 | 2005-02-16 | 华中科技大学 | Direct current sensor |
| CN201247301Y (en) * | 2008-08-18 | 2009-05-27 | 天津市电力公司 | Apparatus for measuring isonym end of portable current transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200730827A (en) * | 2006-02-15 | 2007-08-16 | Appa Technology Corp | Fully automatic hook-type electric meter |
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2018
- 2018-04-08 CN CN201810308081.XA patent/CN108333552B/en active Active
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| CN86108441A (en) * | 1986-12-18 | 1988-06-29 | 中国船舶工业总公司第七研究院第七一五研究所 | Automatic mutual-inductor calibrating instrument |
| CN1580788A (en) * | 2004-05-18 | 2005-02-16 | 华中科技大学 | Direct current sensor |
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| CN107271943A (en) * | 2017-06-05 | 2017-10-20 | 广西电网有限责任公司电力科学研究院 | Switching device and method for standard verification secondary wiring of current mutual inductor |
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| CN108333552A (en) | 2018-07-27 |
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