CN214097761U - Device for detecting metering function of electric energy meter - Google Patents
Device for detecting metering function of electric energy meter Download PDFInfo
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- CN214097761U CN214097761U CN202022929821.7U CN202022929821U CN214097761U CN 214097761 U CN214097761 U CN 214097761U CN 202022929821 U CN202022929821 U CN 202022929821U CN 214097761 U CN214097761 U CN 214097761U
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Abstract
The utility model provides a detect device of electric energy meter measurement function, the device includes the main control unit, the main control unit is connected voltage source unit, current source unit, pulse detecting element and alarm unit respectively, voltage source unit, current source unit, pulse detecting element all are connected to and are surveyed trigger state electric energy meter, the voltage source unit includes the relay, and the input of electric wire netting voltage connection relay, the output of relay is connected the electric energy meter all the way and is given the electric energy meter power supply, another way connection metering element's voltage detection passageway. The utility model discloses the electric energy meter under the trigger state just can realize the detection of measurement function, need not to the electric energy meter to the finished product state, can detect the normality of measurement function in advance, is favorable to the quality management and control and reduces the cost of doing over again.
Description
Technical Field
The utility model relates to an electric energy meter detection area, concretely relates to detect electric energy meter measurement function.
Background
During the manufacturing process of the electric energy meter, the metering circuit of the meter needs to be detected and calibrated. The related test equipment and schemes are more, and the following is a brief description of 3 schemes:
the first scheme is as follows: the functional block diagram is shown in fig. 1, the automatic test system for the metering function of the intelligent electric energy meter is connected with a communication interface of a standard source through a communication interface of a checking and judging device, voltage and current terminals of the electric energy meter are in butt joint with a voltage and current output interface of the standard source, the intelligent electric energy meter output signal detection device collects signals output by the electric energy meter and uploads the signals to the checking and judging device, and the checking and judging device judges the metering accuracy and reliability of the electric energy meter to be detected by reading metering data in the electric energy meter to be detected. Such as the patent: ZL201621140701.6 is used for the automatic test system of intelligent electric energy meter measurement function.
Scheme II: the functional block diagram is as shown in fig. 2, a software running environment is established in a host machine, test software is run in the software running environment, a function interface environment is called, a metering core electric quantity data input file and a preset output file are obtained through the function interface environment, metering core electric quantity data in the metering core electric quantity data input file are read, the metering core electric quantity data are input into the test software, further, a test result of testing the core electric quantity data is received, the test result is written into the test output file, and finally, whether the test output file is consistent with the preset output file or not is compared, if so, the test software is judged to have correct processing logic. Such as the patent: ZL 202010601363.6A test method, device and equipment for electric energy meter test software.
The third scheme is as follows: the functional block diagram is shown in fig. 3, and the metering device circuit board intelligent test system comprises a main control unit for controlling the operation of the programming device, the display performance test device, the function test device, the identification device and the board conveying mechanism. The intelligent test system of the invention can automatically and orderly complete the program programming, the performance detection and the function detection of the circuit board to be tested, and the test process can be automatically completed and automatically judged. Such as the patent: an intelligent test system and an intelligent test method for a circuit board of a ZL201710277139.4 metering instrument.
The existing electric energy meter has the following defects in the measurement function detection, and the measurement function detection in the prior art is generally carried out at the finished product stage. In this state, if a defective metering circuit is detected, the face cover and the PCBA need to be disassembled for rework or maintenance, the rework process is complicated and costly, and the rework process is prone to cause other problems, such as the first and second schemes. The detection is single, the functions of the chip can be tested only, and whether the functions of the metering circuit are normal cannot be detected. Such as scheme three. An expensive calibration stand is required.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a detect device of electric energy meter measurement function, the device just can realize measurement function's detection at the electric energy meter under the trigger state, need not to the electric energy meter to the finished product state, can detect the normality of measurement function in advance, is favorable to the quality management and control and reduces the cost of doing over again.
The technical scheme of the utility model:
the device comprises a main control unit, wherein the main control unit is respectively connected with a voltage source unit, a current source unit, a pulse detection unit and an alarm unit, the voltage source unit, the current source unit and the pulse detection unit are all connected to a tested board machine state electric energy meter, the voltage source unit comprises a relay, the voltage of a power grid is connected with the input end of the relay, the output end of the relay is connected with the electric energy meter for supplying power to the electric energy meter, and the other circuit of the output end of the relay is connected with a voltage detection channel of a metering unit.
The main control unit comprises a single chip microcomputer, a No. 5 pin and a No. 6 pin of the single chip microcomputer are connected with the crystal oscillator unit, a No. 7 pin and a No. 9 pin of the single chip microcomputer are connected with a single chip microcomputer power supply, and a relay control pin of the single chip microcomputer is connected with a relay.
The alarm unit includes bee calling organ unit and LED unit, the bee calling organ control pin of singlechip is connected to the input of bee calling organ unit, the LED control pin of singlechip is connected to the input of LED unit, bee calling organ unit includes the second resistance, and the bee calling organ control pin of singlechip is connected to the input of second resistance, and the base of triode is connected to the output of second resistance, and bee calling organ is connected to the collecting electrode of triode, the projecting pole ground connection of triode, and the output of second resistance is still parallel connection have third resistance and second electric capacity (C2).
The LED unit comprises a light emitting diode and a first resistor which are connected in series.
And a pulse detection pin of the singlechip is connected with a pulse detection unit.
The current source unit is a 50Hz square wave output by the singlechip.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the device just can realize the measuring function's detection at the electric energy meter of trigger state, need not to reach the electric energy meter to the finished product state, can detect the normality of measuring function in advance, is favorable to quality management and control and reduces the cost of doing over again.
2. The device can detect the operation condition of the whole metering module, including a chip, a peripheral circuit and the like, and the detection is more comprehensive.
3. The device designs simple and easy voltage source and current source, need not expensive school table just can detect the measurement function.
Drawings
Fig. 1 is a schematic diagram of a prior art.
Fig. 2 is a schematic diagram of a second prior art.
Fig. 3 is a schematic diagram of the third prior art.
Fig. 4 is a schematic view of the overall structure of the present invention.
Fig. 5 is a schematic diagram of the voltage source structure of the present invention.
Fig. 6 is a flow chart of the current source implementation of the present invention.
Fig. 7 is a schematic diagram of the circuit structure of the main control unit of the present invention.
Fig. 8 is a schematic diagram of the circuit structure of the alarm unit of the present invention.
Fig. 9 is a schematic diagram of the voltage source circuit structure of the present invention.
Fig. 10 is a schematic diagram of the testing process of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 4 to 10, the present invention provides a technical solution:
a device 1 for detecting the metering function of an electric energy meter comprises a main control unit 10, wherein the main control unit 10 is respectively connected with a voltage source unit 11, a current source unit 12, a pulse detection unit 13 and an alarm unit 14, the voltage source unit 11, the current source unit 12 and the pulse detection unit 13 are all connected to a tested board machine state electric energy meter 2, the voltage source unit 11 comprises a relay 111, a power grid voltage 110 is connected with the input end of the relay 111, one path of the output end of the relay 111 is connected with the electric energy meter for supplying power to the electric energy meter, and the other path of the output end of the relay 111 is connected with a voltage detection channel of a metering unit.
The main control unit 10 comprises a single chip microcomputer U2, a No. 5 pin and a No. 6 pin of the single chip microcomputer U2 are connected with the crystal oscillator unit, a No. 7 pin and a No. 9 pin of the single chip microcomputer U2 are connected with a single chip microcomputer power supply, and a relay control pin of the single chip microcomputer U2 is connected with the relay 111.
The LED unit includes a light emitting diode H1 and a first resistor R1 connected in series.
And a pulse detection pin of the singlechip U2 is connected with the pulse detection unit 13.
The current source unit 12 is a 50Hz square wave output by the singlechip U2.
The singlechip U2 adopts STM8S003F3 singlechip.
The main control unit:
● control the output of voltage source, and realize on-off control mainly through relay;
● current pulse signal output;
● receives the signal of the pulse checking device, and judges whether the metering function is normal or not according to the pulse number.
● if the abnormal metering function is detected, an alarm signal is output to the alarm device.
Voltage source:
● the voltage of the power grid (single phase 220V, three phase 3X 220/380V) is divided into 2 paths to be output after being controlled by a relay, one path is used for supplying the voltage detection channel of the metering unit, the other path is used for supplying power to the electric energy meter,
current source: outputting a voltage square wave of 50 HZ. The method is mainly realized by a singlechip, and the flow chart of the realized program is as shown in figure 6:
pulse detection: counting the pulse number of the electric energy meter, and triggering the single chip microcomputer to interrupt to count the pulse through the rising edge of the signal.
And (4) alarming: after the abnormal electric energy meter is detected, alarm prompt is carried out, sound and light alarm is realized mainly through a buzzer and an LED lamp, and the realized schematic diagram is shown in figure 8:
electric energy meter of trigger state: the condition where the patch and the plug-in component have been soldered to the circuit board.
1. The device uses the voltage of the power grid as the voltage source directly, and the square wave signal of 50Hz as the current source, and the technology has simple design and low cost, and does not need to use an expensive meter calibration platform.
2. The device just can realize the measuring function's detection at the electric energy meter of trigger state, need not to reach the electric energy meter to the finished product state, can detect the normality of measuring function in advance, is favorable to quality management and control and reduces the cost of doing over again.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The device (1) for detecting the metering function of the electric energy meter is characterized in that the device (1) comprises a main control unit (10), the main control unit (10) is respectively connected with a voltage source unit (11), a current source unit (12), a pulse detection unit (13) and an alarm unit (14), the voltage source unit (11), the current source unit (12) and the pulse detection unit (13) are all connected to a tested board machine state electric energy meter (2), the voltage source unit (11) comprises a relay (111), a power grid voltage (110) is connected with the input end of the relay (111), one path of the output end of the relay (111) is connected with the electric energy meter to supply power to the electric energy meter, and the other path of the output end of the relay (111) is connected with a voltage detection channel of the metering unit.
2. The device (1) for detecting the metering function of the electric energy meter is characterized in that the main control unit (10) comprises a single chip microcomputer (U2), pins 5 and 6 of the single chip microcomputer (U2) are connected with a crystal oscillator unit, pins 7 and 9 of the single chip microcomputer (U2) are connected with a single chip microcomputer power supply, and a relay control pin of the single chip microcomputer (U2) is connected with a relay (111).
3. The device (1) for detecting the metering function of the electric energy meter is characterized in that the alarm unit (14) comprises a buzzer unit and an LED unit, the input end of the buzzer unit is connected with a buzzer control pin of a single chip microcomputer (U2), the input end of the LED unit is connected with an LED control pin of a single chip microcomputer (U2), the buzzer unit comprises a second resistor (R2), the input end of the second resistor (R2) is connected with the buzzer control pin of the single chip microcomputer (U2), the output end of the second resistor (R2) is connected with the base of a triode (Q1), the collector of the triode (Q1) is connected with the buzzer (B1), the emitter of the triode (Q1) is grounded, and the output end of the second resistor (R2) is further connected with a third resistor (R3) and a second capacitor (C2) in parallel.
4. A device (1) for detecting the metering function of an electric energy meter according to claim 3, characterized in that said LED unit comprises a light emitting diode (H1) and a first resistor (R1) connected in series.
5. The device (1) for detecting the metering function of the electric energy meter according to claim 2, wherein a pulse detection pin of the single chip microcomputer (U2) is connected with the pulse detection unit (13).
6. Device (1) for detecting the metering function of an electric energy meter according to claim 2, characterized in that the current source unit (12) is a 50hz square wave output by a single-chip microcomputer (U2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022929821.7U CN214097761U (en) | 2020-12-09 | 2020-12-09 | Device for detecting metering function of electric energy meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022929821.7U CN214097761U (en) | 2020-12-09 | 2020-12-09 | Device for detecting metering function of electric energy meter |
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| Publication Number | Publication Date |
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| CN214097761U true CN214097761U (en) | 2021-08-31 |
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| CN202022929821.7U Active CN214097761U (en) | 2020-12-09 | 2020-12-09 | Device for detecting metering function of electric energy meter |
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- 2020-12-09 CN CN202022929821.7U patent/CN214097761U/en active Active
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