CN111609950A - Device and method for checking temperature measuring function of wiring terminal of electric energy meter - Google Patents
Device and method for checking temperature measuring function of wiring terminal of electric energy meter Download PDFInfo
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- CN111609950A CN111609950A CN202010572191.4A CN202010572191A CN111609950A CN 111609950 A CN111609950 A CN 111609950A CN 202010572191 A CN202010572191 A CN 202010572191A CN 111609950 A CN111609950 A CN 111609950A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K15/00—Testing or calibrating of thermometers
- G01K15/005—Calibration
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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
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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Abstract
The invention discloses a device and a method for checking the temperature measurement function of a wiring end of an electric energy meter, and the device comprises a terminal seat, wherein four connecting columns are uniformly arranged on the terminal seat at intervals, each connecting column is correspondingly connected with a wiring terminal of the electric energy meter to be tested, each connecting column comprises a conductive shell, an insulating heat conduction layer and a heating core which are sequentially arranged from outside to inside, the heating core is connected with a current booster, the conductive shell of the connecting column connected with a power input terminal is connected with an alternating current voltage-stabilized power supply, the conductive shell connected with a load access terminal is connected with a Bluetooth circuit breaker, the Bluetooth circuit breaker is connected with a program-controlled high-power electronic load, and the electric energy. According to the invention, the conductive shell of the connecting column is connected with the alternating current stabilized voltage power supply and the program-controlled high-power electronic load, and the heating core is connected with the current booster, so that the heating condition of the non-standard wiring terminal of the electric energy meter in the working process is accurately simulated, the fault condition is restored with high precision, and the accuracy of the checking result is ensured.
Description
Technical Field
The invention relates to the field of intelligent electric energy meters, in particular to a device and a method for checking the temperature measuring function of a wiring terminal of an electric energy meter.
Background
In the automatic verification of the electric energy meter, the automatic crimping reliability of the terminal becomes a key technical problem which restricts the automatic verification of the electric energy meter. When the electric energy meter is installed and used on site, if the wiring of the wiring terminal is not standard, for example, the wire is clamped without being screwed down by a wire pressing screw, or the used wire is too thin, the contact surface is too small to cause poor contact, the contact resistance is too large, or other reasons (the circuit current is greater than the maximum current of the electric energy meter), when the large current exists, the long-time operation condition is caused, the wiring terminal can generate heat, the temperature rise of the terminal is too high, the detection device or the electric energy meter is easily damaged, the wiring terminal and the electric energy meter can be burnt out in serious conditions, the fire hazard is caused, and the. Therefore, terminal temperature rise monitoring becomes an increasingly important research subject. The existing electric energy meter is additionally provided with a temperature measuring function at a wiring end, the temperature of the terminal is measured and compared with a set value, when the temperature exceeds the set value, the electric energy meter gives out sound and light alarm, simultaneously cuts off power supply and uploads an event to a master station through a communication module. In order to enable the terminal temperature measurement to be more accurate and reliable and avoid the occurrence of false alarm and missed alarm events, the temperature measurement function of the wiring terminal of the electric energy meter needs to be verified.
Chinese patent 201910602595.0 discloses a calibration device for temperature detection of a wiring terminal of an electric energy meter and a calibration method thereof, the calibration device comprises a temperature detection calibration device, the temperature detection calibration device comprises a terminal seat connected with a controller through a cable, the terminal seat is connected with a plurality of wiring terminals, one wiring terminal is correspondingly connected with one wiring terminal, each wiring terminal is provided with a temperature sensor I, each wiring terminal comprises a metal shell, a temperature sensor II and a heating device are arranged in the metal shell, and the end part of the metal shell is provided with a connecting contact which is contacted with a metal contact on the wiring terminal of the electric energy meter; the controller controls the heating device to apply set temperature to the wiring terminal of the electric energy meter, reads the temperature data of the wiring terminal acquired by the electric energy meter at the current temperature, and then compares the set value with the temperature value of the wiring terminal acquired by the electric energy meter, so that whether the temperature detection of the wiring terminal in the electric energy meter is accurate or not is judged. For convenience in calibration, a temperature sensor II of the temperature detection and calibration device is arranged inside a binding post outside the electric energy meter and is close to the heating device, the temperature sensor II actually measures the temperature of the binding post, the temperature sensor I of the electric energy meter is usually arranged at the tail of a binding post in the electric energy meter, the tail of the binding post is mainly heated by heat conduction, so that an error exists between the measurement results of the temperature sensor I and the temperature sensor II, and the error is larger along with the higher the heating device; because the general temperature rise phenomenon exists in each connecting terminal after the electric energy meter works for a period of time, the verification method, whether the simulation is actual or actually occurs, is based on the premise that the temperature rise phenomenon already exists, while the verification device and the verification method in the prior art are more focused on fault temperature detection, the accurate simulation and high-precision reduction of the general temperature rise phenomenon are not further involved, the irregular wiring phenomenon cannot be completely simulated, and the accuracy of the verification result is uncertain.
Disclosure of Invention
The applicant overcomes the defects in the existing production, and provides a wiring end temperature measurement function calibration device of an electric energy meter with a reasonable structure and a calibration method thereof.
The technical scheme adopted by the invention is as follows:
a device for checking the temperature measurement function of a wiring terminal of an electric energy meter comprises a terminal base, wherein a plurality of connecting columns are uniformly arranged on the terminal base at intervals, each connecting column is correspondingly connected with a wiring terminal of the electric energy meter to be tested, and each wiring terminal comprises a power supply input terminal and a load access terminal; every spliced pole includes from outer to interior electrically conductive shell, insulating heat-conducting layer and the core that generates heat that sets gradually, and the core that generates heat is connected and is risen the ware, and the electrically conductive shell of the spliced pole of connecting the power input terminal is connected powerful constant voltage power supply, and the electrically conductive shell of connecting the load access terminal is connected bluetooth circuit breaker, and bluetooth circuit breaker connects programme-controlled high-power electronic load, and electric energy meter, rise and flow ware and programme-controlled high-power electronic load pass through cable junction control module.
The tail of each wiring terminal is provided with a connecting hole, a connecting column on the terminal base is inserted into the connecting hole and is electrically connected with the wiring terminal, the side wall of the connecting hole is provided with two through holes, and a first temperature sensor connected with the control module is fixed on the through holes.
The connecting column is in interference fit with the connecting terminal, the diameter of the end part of the conductive shell is larger than the inner diameter of the connecting hole, and the end part of the conductive shell is of a cross-shaped opening structure and is hollow inside; when the connecting column is inserted into the connecting hole, the end part of the conductive shell is tightly contacted with the hole wall of the connecting hole.
The control module comprises an MCU controller, and a wireless communication module, a wired communication module, a display, a first temperature control module, a second temperature control module, a data acquisition module and an alarm which are respectively connected with the MCU controller; the data acquisition module is connected with the first temperature sensor, the second temperature control module is connected with the control end of the current booster, the first temperature control module is connected with the control end of the program-controlled high-power electronic load, and the wired communication module is connected with the electric energy meter.
The heating core is an iron-chromium-aluminum alloy high-resistance conductor with the diameter of 4mm and the length of 50mm, and the resistance value of the heating core is 6-12 ohms; the alternating current stabilized power supply is a 220V high-power alternating current stabilized power supply.
The first temperature sensor is a fiber grating temperature sensor, a fiber grating of the fiber grating temperature sensor is packaged in a sleeve made of a copper material, and a heat-conducting protective sleeve made of a ceramic material is arranged outside the sleeve.
The calibration method of the wiring terminal temperature measurement function calibration device using the electric energy meter comprises the following steps:
step one, wiring: correspondingly inserting a connecting column on a terminal base into a connecting terminal of the electric energy meter, and respectively inserting a first temperature sensor and a bolt into a through hole of each connecting terminal;
step two, setting: the control device presets a wiring terminal alarm temperature threshold value, a switching-off temperature threshold value and a standard wiring temperature threshold value of the electric energy meter;
step three, simulating standard wiring: the control device controls the program-controlled high-power electronic load through the first temperature control module, so that the control device automatically adjusts the current passing through the wiring terminals and judges whether the temperature of each wiring terminal reaches a set value or not; when the set value is reached and the set value is kept for a certain time, the control device is communicated with the electric energy meter in a wired or wireless communication mode, the temperature measured value of a second temperature sensor in the electric energy meter is read and is compared with the temperature set value of the wiring terminal, and the comparison result is displayed on a display of the control device; when the comparison result exceeds the allowable error range, the control device gives an alarm and prompts through the display and the alarm, and simultaneously sends the verification result to the electric energy meter, so that the electric energy meter automatically corrects the measured value; when the comparison result is within the allowable error range, the control device controls the verification of the next temperature point until the verification of all the temperature points is completed;
step four, simulating non-standard wiring: the control device controls the program-controlled high-power electronic load through the first temperature control module to automatically adjust the current passing through the wiring terminal, controls the current booster through the second temperature control module according to the alarm temperature threshold value or the switching-off temperature threshold value of the wiring terminal to enable the heating core in one connecting column to be conductive and heat the connecting column, and controls the current booster to enable the heating core to be electrified when the temperature of the connecting column is lower than a set value; when the temperature of the connecting column reaches a preset value, the heating core is powered off; when the temperature of the connecting terminal corresponding to the connecting column reaches a set value and is kept for a certain time, the control device is communicated with the electric energy meter in a wired or wireless communication mode, reads the temperature measured value of the second temperature sensor and compares the temperature measured value with the temperature set value of the connecting terminal.
In the third step and the fourth step, the control device continuously reads the temperature of the wiring terminal measured by the electric energy meter through the Bluetooth module on one hand, continuously records the temperature with the time mark on the collecting point of the wiring terminal on the other hand, reads the temperature measurement data of the wiring terminal and compares the temperature measurement data with the temperature of the wiring terminal measured by the electric energy meter on the other hand.
In the fourth step, the control device presets a relation curve of temperature and current; the relation curve of the temperature and the current is obtained by measuring different currents flowing through the heating core and different temperatures on the collecting point of the wiring terminal at the corresponding position in advance and performing curve fitting by adopting a least square method; the control device adjusts the current flowing through the heating core through the program-controlled high-power electronic load according to the relation curve of the temperature and the current so as to quickly acquire the temperature point to be verified.
In the fourth step, the control device reads the temperature measurement related state information of the electric energy meter through the Bluetooth module and judges the conformity of the temperature measurement function of the wiring terminal of the electric energy meter; the temperature measurement related state information comprises an alarm state, a switching-on/off command state, an event record and the state of an external circuit breaker.
The invention has the following beneficial effects:
1. according to the invention, the conductive shell of the connecting column is connected with the alternating current stabilized voltage power supply and the program-controlled high-power electronic load, so that the accuracy verification of the temperature measurement function of the electric energy meter during standard wiring can be realized; the heating core is connected with the current booster, so that the heating condition of the non-standard terminal of the electric energy meter in the working process is accurately simulated based on the general temperature rise phenomenon, the fault condition is restored with high precision, and the accuracy of the checking result is ensured;
2. according to the invention, the first temperature sensor is arranged on the threaded hole of the wiring terminal, so that the temperature of the wiring terminal is measured by the first temperature sensor, the measurement objects of the first temperature sensor and the second temperature sensor of the electric energy meter are consistent, the error between the measurement results is small, and the accuracy of temperature measurement is improved;
3. according to the invention, the diameter of the end part of the conductive shell is slightly larger than the inner diameter of the connecting hole, the end part is of a cross-shaped opening structure, and the interior of the conductive shell is hollow, so that when the connecting column is inserted into the connecting terminal of the electric energy meter, a certain wiring pressure is achieved, the reliability of electrical connection is ensured, meanwhile, the end part of the conductive shell is tightly contacted with the hole wall of the connecting hole, the contact area is large, the heat conduction effect is good, the realization of heat balance is accelerated;
4. the fiber grating temperature sensor is adopted as the first temperature sensor, the fiber grating temperature sensor is small in size and high in response speed, temperature change can be accurately measured, electromagnetic interference influence can be shielded, and measurement accuracy is improved.
Drawings
FIG. 1 is a block diagram of the present invention.
FIG. 2 is a block diagram of a control module according to the present invention.
Fig. 3 is a schematic structural view of the connecting column of the present invention.
In the figure: 1. a controller; 2. a current riser; 3. program-controlled high-power electronic loads; 4. a Bluetooth circuit breaker; 5. an alternating current stabilized voltage power supply; 6. a terminal block; 7. connecting columns; 8. a bolt; 9. a first temperature sensor; 10. an electric energy meter; 11. an MCU controller; 12. a wireless communication module; 13. a wired communication module; 14. a display; 15. a first temperature control module; 16. a second temperature control module; 17. a data acquisition module; 18. an alarm; 71. a conductive shell; 72. a heat conductive layer; 73. a heat generating core; 74. a second power supply line; 75. a first power line.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example one
As shown in fig. 1 to 3, the device for checking the temperature measurement function of the wiring terminal of the electric energy meter comprises a terminal base 6, four connection columns 7 are arranged on the terminal base 6 at uniform intervals, each connection column 7 is correspondingly connected with a wiring terminal of an electric energy meter 10 to be tested, the wiring terminal comprises a pair of power input terminals and a pair of load access terminals, as shown in fig. 3, each connection column 7 comprises a metal conductive shell 71, an insulating heat conduction layer 72 and a heating core 73 which are sequentially arranged from outside to inside, the heating core 73 is a high-resistance conductor, the heating cores 73 are respectively connected with a current booster 2 through second power wires 74, the metal conductive shell 71 of the connection column 7 connected with the power input terminals is connected with a high-power alternating current stabilized voltage power supply 5 through a first power wire 75, the metal conductive shell 71 connected with the load access terminals is connected with a bluetooth circuit breaker 4 through the first power wire 75, the bluetooth, the electric energy meter 10, the current booster 2 and the program-controlled high-power electronic load 3 are connected with the control module 1 through cables. The conductive shell 71 of the connecting column 7 is connected with the alternating current stabilized voltage power supply 5 and the program-controlled high-power electronic load 3, so that the accuracy verification of the temperature measurement function of the electric energy meter 10 during standard wiring can be realized; and then, the heating core 73 is connected with the current booster 2, so that the heating condition of the non-standard terminal of the electric energy meter 10 in the working process is accurately simulated, the fault condition is restored with high precision, and the accuracy of the checking result is ensured.
The wiring terminals are positioned at the tail end of the electric energy meter 10, a connecting hole is formed in the tail portion of each wiring terminal, each connecting hole is a blind hole, the head portions of the wiring terminals are fixedly connected with a second temperature sensor of the electric energy meter 10 respectively, and the second temperature sensors are used for measuring the temperature of the wiring terminals; the connecting post 7 on the terminal seat 6 is inserted into the connecting hole and is electrically connected with the connecting terminal, two threaded through holes are formed in the side wall of the connecting hole, a first temperature sensor 9 and a bolt 8 which are connected with the control module 1 are fixed on the through holes through threaded connection respectively, the first temperature sensor 9 is used for measuring the temperature of the connecting post 7, and the bolt 8 penetrates through the through holes to support the connecting post 7 and the connecting terminal tightly and fixedly, so that the electrical connection between the connecting post 7 and the connecting terminal is realized. Through setting up first temperature sensor 9 on binding post's screw hole, make first temperature sensor 9 record binding post's temperature, first temperature sensor 9 and second temperature sensor's measuring object is unanimous, and the error is less between the measuring result, has improved temperature measurement's accuracy.
As shown in fig. 2, the control module 1 includes an MCU controller 11, and a wireless communication module 12, a wired communication module 13, a display 14, a first temperature control module 15, a second temperature control module 16, a data acquisition module 17 and an alarm 18, which are respectively connected to the MCU controller 11. The data acquisition module 17 is connected with the first temperature sensor 9, the second temperature control module 16 is connected with the control end of the current booster 2, the first temperature control module 15 is connected with the control end of the program-controlled high-power electronic load 3, and the wired communication module 13 is connected with the electric energy meter 10.
The AC stabilized power supply 5 is a 220V high-power AC stabilized power supply.
The heating core 73 is a high resistance conductor with a resistance value of 6-12 ohms. The heating core 73 is made of an iron-chromium-aluminum alloy high-resistance conductor with the diameter of 4mm and the length of 50 mm.
The conductive shell 71 is made of copper, the diameter of the end of the conductive shell 71 is slightly larger than the inner diameter of the connecting hole, the connecting column 7 is in interference fit with the connecting terminal, the end of the conductive shell 71 is of a cross-shaped opening structure, the conductive shell is hollow inside, when the connecting column 7 is inserted into the connecting hole of the connecting terminal of the electric energy meter 10, certain wiring pressure is achieved, reliability of electrical connection is guaranteed, meanwhile, the end of the conductive shell 71 is in close contact with the hole wall of the connecting hole, the contact area is large, and the heat conduction effect is.
First temperature sensor 9 is fiber grating temperature sensor, fiber grating temperature sensor's fiber grating encapsulation is in the cover pipe that the copper product material was made, and the cover pipe outside is equipped with ceramic material's heat conduction protective sheath, and inside sleeve pipe heat conduction can be good, and outside heat conduction protective sheath insulating nature is good, and anti-electromagnetic interference ability is strong, and fiber grating temperature sensor is small, and response speed is fast, not only can the accurate measurement temperature change, can shield the electromagnetic interference influence moreover.
Example two
The invention relates to a method for checking the temperature measurement function of a wiring terminal of an electric energy meter, which comprises the following steps:
step one, wiring: correspondingly inserting a connecting column 7 on a terminal block 6 into a connecting terminal of an electric energy meter 10, and respectively inserting a first temperature sensor 9 and a bolt 8 into a through hole of each connecting terminal;
step two, setting: the control device 1 presets a wiring terminal alarm temperature threshold value, a switching-off temperature threshold value and a standard wiring temperature threshold value of the electric energy meter 10;
step three, simulating standard wiring: the control device 1 controls the program-controlled high-power electronic load through the first temperature control module 15, so that the current passing through the four wiring terminals is automatically adjusted, and whether the temperature of each wiring terminal reaches a set value is judged according to the temperature value measured by the first temperature sensor 9; when the set value is reached and the set value is kept for a certain time, the control device 1 communicates with the electric energy meter 10 in a wired or wireless communication mode, reads the temperature measured value of a second temperature sensor in the electric energy meter 10, compares the temperature measured value with the temperature set value of the wiring terminal, and displays the comparison result on a display 14 of the control device 1; when the comparison result exceeds the allowable error range, the control device 1 gives an alarm and prompts through the display 14 and the alarm 18, and simultaneously the control device 1 sends the verification result to the electric energy meter 10 to enable the electric energy meter 10 to automatically correct the measured value; when the comparison result is within the allowable error range, the control device 1 controls the verification of the next temperature point until the verification of all the temperature points is completed;
step four, simulating non-standard wiring: the control device 1 controls the program-controlled high-power electronic load through the first temperature control module 15 to automatically adjust the current passing through the four wiring terminals, controls the current booster 2 through the second temperature control module 16 according to the alarm temperature threshold value or the switching-off temperature threshold value of the wiring terminals to enable the heating core 73 in one connecting column 7 to be conductive and heat the connecting column 7, and controls the current booster 2 to enable the heating core 73 to be electrified when the temperature of the connecting column 7 is lower than a set value; when the temperature of the connecting column 7 reaches a preset value, the heating core 73 is powered off; when the temperature of the connecting terminal corresponding to the connecting column 7 reaches a set value and is kept for a certain time, the control device 1 communicates with the electric energy meter 10 in a wired or wireless communication mode, reads the temperature measured value of the second temperature sensor, and compares the temperature measured value with the temperature set value of the connecting terminal.
In the third step and the fourth step, in the test process, the control device 1 continuously reads the temperatures of the four wiring terminals measured by the electric energy meter 10 through the bluetooth module on the one hand, continuously records the temperatures with the time marks on the four wiring terminal collecting points on the other hand, reads the temperature measurement data of the four wiring terminals, and compares the temperature measurement data with the temperatures of the four wiring terminals measured by the electric energy meter 10 on the other hand.
The control device 1 presets a relation curve of temperature and current; the relation curve of the temperature and the current is obtained by measuring different currents flowing through the heating core 73 and different temperatures on the collecting points of the connecting terminal at corresponding positions in advance and performing curve fitting by adopting a least square method; the control device 1 adjusts the current flowing through the heating core 73 according to the relationship curve of the temperature and the current by the program-controlled high-power electronic load 3, so as to quickly acquire the temperature point to be verified.
In the fourth step, the control device 1 reads the temperature measurement related state information of the electric energy meter 10 through the bluetooth module, and judges the conformity of the temperature measurement function of the wiring terminal of the electric energy meter; the temperature measurement related state information comprises an alarm state, a switching-on/off command state, an event record and the state of an external circuit breaker.
In step four, the control device 1 can control the heat generating cores 73 in the connecting posts 7 to generate heat by conduction at the same time.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention. In other embodiments, the electric energy meter may have a plurality of terminals, and the second temperature sensor 9 and the connection posts 7 on the terminal block 6 connected to the controller 1 are the same in number as the terminals. The electric energy meter 10 is provided with a Bluetooth module and is in communication connection with the Bluetooth circuit breaker 4 through the Bluetooth module.
Claims (10)
1. The utility model provides a wiring end temperature measurement function calibration equipment of electric energy meter which characterized in that: the terminal comprises a terminal base (6), wherein a plurality of connecting columns (7) are arranged on the terminal base (6), each connecting column (7) is correspondingly connected with a connecting terminal of an electric energy meter (10), and each connecting terminal comprises a power supply input terminal and a load access terminal; every spliced pole (7) are including the electrically conductive shell of metal (71), insulating heat-conducting layer (72) and the core (73) that generates heat that set gradually from outer to inner, it rises current ware (2) to generate heat core (73) connection, alternating current voltage-stabilized power supply (5) are connected in electrically conductive shell (71) of spliced pole (7) of connecting the power input terminal, bluetooth circuit breaker (4) are connected in electrically conductive shell (71) of connecting the load access terminal, programme-controlled high-power electronic load (3) are connected in bluetooth circuit breaker (4), electric energy meter (10), rise current ware (2) and programme-controlled high-power electronic load (3) connection control module (1), first temperature sensor (9) of being connected with control module (1) are fixed in on binding post.
2. The electric energy meter terminal temperature measurement function verifying unit according to claim 1, characterized in that: the tail of each wiring terminal is provided with a connecting hole, a connecting column (7) on the terminal base (6) is inserted into the connecting hole and is in conductive connection with the wiring terminal, the side wall of the connecting hole is provided with two through holes, and a probe of the first temperature sensor (9) is fixed on the through holes.
3. The electric energy meter terminal temperature measurement function verifying unit according to claim 2, characterized in that: the connecting column (7) is in interference fit with a connecting hole of the connecting terminal, the diameter of the end part of the conductive shell (71) is larger than the inner diameter of the connecting hole, and the end part of the conductive shell (71) is of a cross-shaped opening structure and is hollow inside; when the connecting column (7) is inserted into the connecting hole, the end part of the conductive shell (71) is tightly contacted with the hole wall of the connecting hole.
4. The electric energy meter terminal temperature measurement function verifying unit according to claim 1, characterized in that: the control module (1) comprises an MCU (microprogrammed control Unit) controller (11), and a wireless communication module (12), a wired communication module (13), a display (14), a first temperature control module (15), a second temperature control module (16), a data acquisition module (17) and an alarm (18) which are respectively connected with the MCU controller (11); the data acquisition module (17) is connected with the first temperature sensor (9), the second temperature control module (16) is connected with the control end of the current booster (2), the first temperature control module (15) is connected with the control end of the program-controlled high-power electronic load (3), and the wired communication module (13) is connected with the electric energy meter (10).
5. The electric energy meter terminal temperature measurement function verifying unit according to claim 1, characterized in that: the heating core (73) is an iron-chromium-aluminum alloy high-resistance conductor with the diameter of 4mm and the length of 50mm, and the resistance value of the heating core (73) is 6-12 ohms; the alternating current stabilized power supply (5) is a 220V high-power alternating current stabilized power supply.
6. The electric energy meter terminal temperature measurement function verifying unit according to claim 1, characterized in that: first temperature sensor (9) are fiber grating temperature sensor, and fiber grating encapsulates in the sleeve pipe that the copper product was made, and the sleeve pipe outside is equipped with ceramic material's heat conduction protective sheath.
7. The method for verifying the terminal temperature measurement function verifying device of the electric energy meter according to claim 1 is characterized in that: the method comprises the following steps:
step one, wiring: correspondingly inserting a connecting column (7) on a terminal base (6) into a connecting terminal of an electric energy meter (10), and respectively inserting a first temperature sensor (9) and a bolt (8) into a through hole of each connecting terminal;
step two, setting: the control device (1) presets a wiring terminal alarm temperature threshold, a switching-off temperature threshold and a standard wiring temperature threshold of the electric energy meter (10);
step three, simulating standard wiring: the control device (1) controls the program-controlled high-power electronic load through the first temperature control module (15), so that the current passing through the wiring terminals is automatically adjusted, and whether the temperature of each wiring terminal reaches a set value is judged; when the set value is reached and the set value is kept for a certain time, the control device (1) is communicated with the electric energy meter (10) in a wired or wireless communication mode, the temperature measured value of a second temperature sensor in the electric energy meter (10) is read and compared with the temperature set value of the wiring terminal, and the comparison result is displayed on a display (14) of the control device (1); when the comparison result exceeds the allowable error range, the control device (1) gives an alarm and prompts through the display (14) and the alarm (18), and meanwhile, the control device (1) sends the check result to the electric energy meter (10) to enable the electric energy meter (10) to automatically correct the measured value; when the comparison result is within the allowable error range, the control device (1) controls the next temperature point to be checked until the checking of all the temperature points is completed;
step four, simulating non-standard wiring: the control device (1) controls the program-controlled high-power electronic load through the first temperature control module (15) to automatically adjust the current passing through the wiring terminal, controls the current booster (2) through the second temperature control module (16) according to the alarm temperature threshold value or the switching-off temperature threshold value of the wiring terminal to enable the heating core (73) in one connecting column (7) to be conductive and heat the connecting column (7), and controls the current booster (2) to enable the heating core (73) to be electrified when the temperature of the connecting column (7) is lower than a set value; when the temperature of the connecting column (7) reaches a preset value, the heating core (73) is powered off; when the temperature of the connecting terminal corresponding to the connecting column (7) reaches a set value and is kept for a certain time, the control device (1) is communicated with the electric energy meter (10) in a wired or wireless communication mode, reads the temperature measured value of the second temperature sensor and compares the temperature measured value with the temperature set value of the connecting terminal.
8. The method for verifying the terminal temperature measurement function of the electric energy meter according to claim 7, characterized in that: in the third step and the fourth step, the control device (1) continuously reads the temperature of the wiring terminal measured by the electric energy meter (10) through the Bluetooth module in the test process, continuously records the temperature with the time mark on the collection point of the wiring terminal, reads the temperature measurement data of the wiring terminal and compares the temperature measurement data with the temperature of the wiring terminal measured by the electric energy meter (10).
9. The method for verifying the terminal temperature measurement function of the electric energy meter according to claim 7, characterized in that: in the fourth step, the control device (1) presets a relation curve of temperature and current; the relation curve of the temperature and the current is obtained by measuring different currents flowing through the heating core (73) and different temperatures on the wiring terminal collecting points at corresponding positions in advance and performing curve fitting by adopting a least square method; the control device (1) adjusts the current flowing through the heating core (73) through the program-controlled high-power electronic load (3) according to the relation curve of the temperature and the current, and the temperature point to be verified is quickly acquired.
10. The method for verifying the terminal temperature measurement function of the electric energy meter according to claim 7, characterized in that: in the fourth step, the control device (1) reads temperature measurement related state information of the electric energy meter (10) through the Bluetooth module, and the conformity of the temperature measurement function of the wiring terminal of the electric energy meter is judged; the temperature measurement related state information comprises an alarm state, a switching-on/off command state, an event record and the state of an external circuit breaker.
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| CN202010572191.4A CN111609950B (en) | 2020-06-22 | 2020-06-22 | Device and method for checking temperature measuring function of wiring terminal of electric energy meter |
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| CN202010572191.4A CN111609950B (en) | 2020-06-22 | 2020-06-22 | Device and method for checking temperature measuring function of wiring terminal of electric energy meter |
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| CN111609950B CN111609950B (en) | 2022-04-01 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN114545758A (en) * | 2022-01-07 | 2022-05-27 | 浙江八达电子仪表有限公司 | Testing device for debugging daily timing error of electric energy meter |
| CN114545758B (en) * | 2022-01-07 | 2024-06-11 | 浙江八达电子仪表有限公司 | Testing device for debugging daily timing error of electric energy meter |
| CN115327468A (en) * | 2022-08-03 | 2022-11-11 | 嵘顺仪器仪表(泗阳)有限公司 | Intelligent electric energy meter calibration equipment |
| CN115327468B (en) * | 2022-08-03 | 2023-10-03 | 嵘顺仪器仪表(泗阳)有限公司 | Intelligent ammeter check-out set |
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