CN112068039A - Device and method for improving wiring reliability of large-current access instrument - Google Patents
Device and method for improving wiring reliability of large-current access instrument Download PDFInfo
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- CN112068039A CN112068039A CN202010817290.4A CN202010817290A CN112068039A CN 112068039 A CN112068039 A CN 112068039A CN 202010817290 A CN202010817290 A CN 202010817290A CN 112068039 A CN112068039 A CN 112068039A
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- temperature
- current
- cable
- signal
- wiring terminal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention relates to a device and a method for improving the wiring reliability of a large-current access instrument, which comprises the following steps: a temperature measuring element and a temperature measuring circuit board are arranged in the instrument and above the cable and current wiring terminal; the temperature measuring element senses a temperature signal at the contact position of the cable and the current wiring terminal, the temperature signal is amplified by the temperature measuring circuit board, and the single chip microcomputer obtains a temperature value T1 at the contact position of the cable and the current wiring terminal based on the amplified temperature signal; a temperature sensor outside the meter senses a temperature value T2 of the external environment; the single chip microcomputer calculates the temperature difference T3 between the temperature value T2 of the current external environment and the temperature value T1 of the contact position to be T1-T2, when the temperature difference T3 is larger than a temperature alarm set value Tset1, the fact that the connection between the cable and the current wiring terminal is abnormal is judged, a first alarm signal is generated, or when the temperature value T1 is larger than the temperature alarm set value Tset2, the fact that the connection between the cable and the current wiring terminal is abnormal is judged, and a second alarm signal is generated.
Description
Technical Field
The invention relates to the technical field of wiring reliability detection of a large-current access instrument, in particular to a device and a method for improving the wiring reliability of the large-current access instrument.
Background
The electric energy meter is used for measuring electric energy and is commonly called as watt-hour meter and fire meter.
There are two current access modes at present: 1. the current entering the instrument is generally below 10A when the current is accessed to the instrument through the mutual inductor, and the heating value is small; 2. the large current is directly connected into the instrument, the maximum connected current can be up to 100A, and the heating value is large.
When poor contact and other conditions occur at the joint of a cable and a current access terminal, a fault is easy to occur in the high-current direct access instrument, and a fire disaster is caused.
At present, the contact reliability of the cable and the current wiring terminal cannot be confirmed in a reliable and effective mode, and the occurrence of faults and the hidden danger of fire can not be avoided.
Disclosure of Invention
Aiming at the problems and the defects in the prior art, the invention provides a device and a method for improving the wiring reliability of a large-current access instrument.
The invention solves the technical problems through the following technical scheme:
the invention provides a device for improving the wiring reliability of a large-current detection access instrument, which is characterized in that a temperature measuring element and a temperature measuring circuit board are arranged in the instrument and above a cable and a current wiring terminal, and the temperature measuring element is electrically connected with a single chip microcomputer in the instrument through the temperature measuring circuit board;
the temperature measuring element is used for sensing a temperature signal at the contact position of the cable and the current wiring terminal, the temperature signal is amplified by the temperature measuring circuit board and then transmitted to the single chip microcomputer, and the single chip microcomputer is used for obtaining a temperature value T1 at the contact position of the cable and the current wiring terminal based on the amplified temperature signal;
the temperature sensor outside the instrument is used for sensing the temperature value T2 of the external environment and transmitting the temperature value T2 to the singlechip;
the single chip microcomputer is used for calculating a temperature difference T3 between a temperature value T2 of the current external environment and a temperature value T1 of a contact position to be T1-T2, judging that the connection between the cable and the current wiring terminal is abnormal when the temperature difference T3 is larger than a temperature alarm set value Tset1, and generating a first alarm signal, or judging that the connection between the cable and the current wiring terminal is abnormal when the temperature value T1 is larger than the temperature alarm set value Tset2, and generating a second alarm signal.
Preferably, the single chip microcomputer is used for transmitting the first alarm signal or the second alarm signal to the background system or the audible and visual alarm to realize alarming and remind inspection personnel of detecting wiring.
The invention also provides a method for improving the wiring reliability of the high-current access instrument, which is characterized by being realized by using the device, and the method comprises the following steps:
the temperature measuring element senses a temperature signal at the contact position of the cable and the current wiring terminal, the temperature signal is amplified by the temperature measuring circuit board and then transmitted to the single chip microcomputer, and the single chip microcomputer obtains a temperature value T1 at the contact position of the cable and the current wiring terminal based on the amplified temperature signal;
the temperature sensor senses a temperature value T2 of an external environment and transmits the temperature value T2 to the singlechip;
the single chip microcomputer calculates the temperature difference T3 between the temperature value T2 of the current external environment and the temperature value T1 of the contact position to be T1-T2, when the temperature difference T3 is larger than a temperature alarm set value Tset1, the fact that the connection between the cable and the current wiring terminal is abnormal is judged, a first alarm signal is generated, or when the temperature value T1 is larger than the temperature alarm set value Tset2, the fact that the connection between the cable and the current wiring terminal is abnormal is judged, and a second alarm signal is generated.
Preferably, the single chip microcomputer transmits the first alarm signal or the second alarm signal to the background system or the audible and visual alarm to realize alarming and remind inspection personnel of detecting wiring.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows:
1. the distance between the temperature measuring point and the position to be measured is short, the temperature measuring precision is higher, and the detection is more reliable;
2. a sensor for measuring the temperature of the contact part of the cable and the current wiring terminal is not arranged outside, so that the device is convenient and quick;
3. the temperature abnormal point is accurately positioned, the independent control of the monitoring loop can be conveniently realized, and the power supply of the abnormal loop is cut off in time.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus for improving the wiring reliability of a large current access meter according to a preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, in the present embodiment, a device for improving the wiring reliability of a large-current detection access instrument is provided, a temperature measuring element 4 and a temperature measuring circuit board 5 are placed inside an instrument 1 and above a cable 2 and a current connecting terminal 3, the cable 2 and the current connecting terminal 3 are fixed by a stud 6, and the temperature measuring element 4 is electrically connected to a single chip microcomputer in the instrument 1 through the temperature measuring circuit board 5.
The temperature measuring element 4 is used for sensing a temperature signal at the contact position of the cable 2 and the current wiring terminal 3, the temperature signal is amplified by the temperature measuring circuit board 5 and then transmitted to the single chip microcomputer, and the single chip microcomputer is used for obtaining a temperature value T1 at the contact position of the cable 2 and the current wiring terminal 3 based on the amplified temperature signal.
And the temperature sensor outside the instrument is used for sensing the temperature value T2 of the external environment and transmitting the temperature value T2 to the singlechip.
The single chip microcomputer is used for calculating a temperature difference T3 between a temperature value T2 of the current external environment and a temperature value T1 of a contact position to be T1-T2, judging that the connection between the cable and the current wiring terminal is abnormal when the temperature difference T3 is larger than a temperature alarm set value Tset1, and generating a first alarm signal, or judging that the connection between the cable and the current wiring terminal is abnormal when the temperature value T1 is larger than the temperature alarm set value Tset2, and generating a second alarm signal.
The single chip microcomputer is further used for transmitting the first alarm signal or the second alarm signal to the background system or the audible and visual alarm to achieve alarming and remind inspection personnel of detecting wiring.
The embodiment also provides a method for improving the wiring reliability of a large-current access instrument, which is implemented by using the device, and the method comprises the following steps:
and S1, the temperature measuring element senses a temperature signal at the contact position of the cable and the current wiring terminal, the temperature signal is amplified by the temperature measuring circuit board and then transmitted to the single chip microcomputer, and the single chip microcomputer obtains a temperature value T1 at the contact position of the cable and the current wiring terminal based on the amplified temperature signal.
And S2, sensing the temperature value T2 of the external environment by the temperature sensor and transmitting the temperature value T2 to the single chip microcomputer.
And S3, the single chip microcomputer calculates the temperature difference T3 between the temperature value T2 of the current external environment and the temperature value T1 of the contact position to be T1-T2, and when the temperature difference T3 is larger than a temperature alarm set value Tset1, the fact that the connection between the cable and the current wiring terminal is abnormal is judged, and a first alarm signal is generated, or when the temperature value T1 is larger than a temperature alarm set value Tset2, the fact that the connection between the cable and the current wiring terminal is abnormal is judged, and a second alarm signal is generated.
And S4, the single chip microcomputer transmits the first alarm signal or the second alarm signal to a background system or an audible and visual alarm to realize alarming and remind inspection personnel of detecting wiring.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (4)
1. A device for improving the wiring reliability of a large-current detection access instrument is characterized in that a temperature measuring element and a temperature measuring circuit board are placed in the instrument and above a cable and a current wiring terminal, and the temperature measuring element is electrically connected with a single chip microcomputer in the instrument through the temperature measuring circuit board;
the temperature measuring element is used for sensing a temperature signal at the contact position of the cable and the current wiring terminal, the temperature signal is amplified by the temperature measuring circuit board and then transmitted to the single chip microcomputer, and the single chip microcomputer is used for obtaining a temperature value T1 at the contact position of the cable and the current wiring terminal based on the amplified temperature signal;
the temperature sensor outside the instrument is used for sensing the temperature value T2 of the external environment and transmitting the temperature value T2 to the singlechip;
the single chip microcomputer is used for calculating a temperature difference T3 between a temperature value T2 of the current external environment and a temperature value T1 of a contact position to be T1-T2, judging that the connection between the cable and the current wiring terminal is abnormal when the temperature difference T3 is larger than a temperature alarm set value Tset1, and generating a first alarm signal, or judging that the connection between the cable and the current wiring terminal is abnormal when the temperature value T1 is larger than the temperature alarm set value Tset2, and generating a second alarm signal.
2. The device for improving the wiring reliability of the large-current detection access instrument according to claim 1, wherein the single chip microcomputer is used for transmitting the first alarm signal or the second alarm signal to a background system or an audible and visual alarm to realize alarming and remind an inspector to detect the wiring.
3. A method for improving the reliability of testing the wiring of a high current access meter using the apparatus of claim 1, said method comprising the steps of:
the temperature measuring element senses a temperature signal at the contact position of the cable and the current wiring terminal, the temperature signal is amplified by the temperature measuring circuit board and then transmitted to the single chip microcomputer, and the single chip microcomputer obtains a temperature value T1 at the contact position of the cable and the current wiring terminal based on the amplified temperature signal;
the temperature sensor senses a temperature value T2 of an external environment and transmits the temperature value T2 to the singlechip;
the single chip microcomputer calculates the temperature difference T3 between the temperature value T2 of the current external environment and the temperature value T1 of the contact position to be T1-T2, when the temperature difference T3 is larger than a temperature alarm set value Tset1, the fact that the connection between the cable and the current wiring terminal is abnormal is judged, a first alarm signal is generated, or when the temperature value T1 is larger than the temperature alarm set value Tset2, the fact that the connection between the cable and the current wiring terminal is abnormal is judged, and a second alarm signal is generated.
4. The method for improving the wiring reliability of the high-current detection access instrument as claimed in claim 3, wherein the single chip microcomputer transmits the first alarm signal or the second alarm signal to a background system or an audible and visual alarm to alarm and remind an inspector of detecting the wiring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010817290.4A CN112068039A (en) | 2020-08-14 | 2020-08-14 | Device and method for improving wiring reliability of large-current access instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010817290.4A CN112068039A (en) | 2020-08-14 | 2020-08-14 | Device and method for improving wiring reliability of large-current access instrument |
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| CN112068039A true CN112068039A (en) | 2020-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010817290.4A Pending CN112068039A (en) | 2020-08-14 | 2020-08-14 | Device and method for improving wiring reliability of large-current access instrument |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884083A (en) * | 2017-09-24 | 2018-04-06 | 国网山东省电力公司菏泽市定陶区供电公司 | Temperature measuring alarming apparatus at a kind of line contacts |
| US20190128947A1 (en) * | 2017-10-26 | 2019-05-02 | Hubbell Incorporated | Electrical connector with sensor |
| CN210690791U (en) * | 2019-09-19 | 2020-06-05 | 山东得胜电力股份有限公司 | Cable line intermediate head fault early warning system |
-
2020
- 2020-08-14 CN CN202010817290.4A patent/CN112068039A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884083A (en) * | 2017-09-24 | 2018-04-06 | 国网山东省电力公司菏泽市定陶区供电公司 | Temperature measuring alarming apparatus at a kind of line contacts |
| US20190128947A1 (en) * | 2017-10-26 | 2019-05-02 | Hubbell Incorporated | Electrical connector with sensor |
| CN210690791U (en) * | 2019-09-19 | 2020-06-05 | 山东得胜电力股份有限公司 | Cable line intermediate head fault early warning system |
Non-Patent Citations (1)
| Title |
|---|
| 肖景和: "实用报警电路300例", 中国电力出版社, pages: 181 * |
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