CN211293231U - Smart electric meter clock error timing test device - Google Patents
Smart electric meter clock error timing test device Download PDFInfo
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- CN211293231U CN211293231U CN201921761399.XU CN201921761399U CN211293231U CN 211293231 U CN211293231 U CN 211293231U CN 201921761399 U CN201921761399 U CN 201921761399U CN 211293231 U CN211293231 U CN 211293231U
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Abstract
The utility model discloses an intelligent ammeter clock error timing test device, including environmental test case, control box, still include: the device comprises an upper computer, a temperature detection module, a clock test module, a pulse per second driving module, a data processing and error display module and a communication module; the temperature detection module, the clock test module, the pulse per second drive module, the data processing and error display module and the communication module are placed in the control box, and the upper computer is connected with the temperature detection module, the clock test module, the pulse per second drive module and the data processing and error display module through the communication module.
Description
Technical Field
The utility model relates to a smart electric meter technical field especially relates to a smart electric meter clock error timing test device.
Background
The electric energy meter is used as an instrument for measuring electric energy, also called a watt-hour meter, a fire meter, an electric energy meter and a kilowatt-hour meter, a national power grid company compiles a series of standards for the cost-control intelligent electric energy meter, and has strict requirements on the delivery performance of the cost-control intelligent electric energy meter, and particularly has higher requirements on the function of clock accuracy in the aspects of cost control function and time-sharing measurement, so that the daily timing error of the electric energy meter before delivery must be strictly detected so as to ensure that the time-sharing measurement performance of the electric energy meter meets the requirements. The accuracy of the daily timing error depends on a clock chip of the electric energy meter or an internal clock module of the singlechip, and in order to achieve the clock accuracy, a temperature compensation mode is often adopted. The clock chip or the internal clock module of the singlechip is used for the initial clock accuracy or the daily timing error. The adoption of a single chip external clock chip can not carry out compensation fine adjustment. To reach within plus or minus 0.02s/d, only the clock chip can be replaced. The singlechip with the clock module and the temperature compensation can meet the requirement in a mode of performing compensation fine adjustment through software.
In the prior art, the daily timing error debugging and testing is performed by an electric energy meter inspection device, most of the devices adopt an upper computer to send a detection signal to a detection device through a communication device, and then daily timing error parameters of the electric energy meter are checked and detected.
The defects of the prior art are as follows:
if the existing electric energy meter inspection device for detecting the daily timing errors is used as the highest metering standard, at least 3 epitopes are generally provided, most epitopes are more than 6, 20 epitopes or even 48-60 epitopes are provided for batch production verification, so the size is large, the daily timing errors can only be verified and detected at normal temperature, and the cost control intelligent electric energy meter verification and detection with strict and harsh requirements on the daily timing errors cannot be carried out, such as: wider temperature ranges of-25 ℃ and 60 ℃ and the like. The intelligent cost-control electric energy meter requires that the daily timing error is +/-0.5 s/d when the daily timing error is 23 ℃ and +/-1.0 s/d when the daily timing error is-25-60 ℃. And if the performance is scored at the full performance test, the requirement is tighter. If the clock error linearity of the clock chip is not good, a high score cannot be obtained. Therefore, the requirement that the daily timing error at-25 ℃ to 60 ℃ meets the high-grade requirement needs to carry out the adjustment and compensation of the daily timing error at the online temperature of-25 ℃ to 60 ℃. The daily timing error of the intelligent cost-control electric energy meter can meet the requirement of obtaining high score at 23 ℃ and-25-60 ℃.
SUMMERY OF THE UTILITY MODEL
The utility model aims at prior art's defect, provide a smart electric meter clock error timing test device, the utility model discloses measure the clock degree of accuracy of electric energy meter under different environmental conditions, realize the automatic test of electric energy meter clock degree of accuracy and test result intelligent analysis and handle, output raw data and analysis result document.
In order to realize the above purpose, the utility model adopts the following technical scheme:
the utility model provides a smart electric meter clock error timing test device, includes environmental test case, control box, still includes: the device comprises an upper computer, a temperature detection module, a clock test module, a pulse per second driving module, a data processing and error display module and a communication module; the temperature detection module, the clock test module, the pulse per second drive module, the data processing and error display module and the communication module are placed in the control box, and the upper computer is connected with the temperature detection module, the clock test module, the pulse per second drive module and the data processing and error display module through the communication module.
Furthermore, the pulse per second driving module is connected with the clock testing module and used for connecting the pulse per second output by the intelligent electric meter into the clock testing module.
Furthermore, the clock testing module is connected with the data processing and error display module, receives the pulse output by the pulse per second driving module, tests the error of the clock, and sends the test result to the data processing and error display module.
Further, the data processing and error display module receives a test result of the clock error sent by the clock test module and displays the test result through an upper computer;
further, the temperature detection module detects the ambient temperature of the smart electric meter.
And the data storage module is connected with the upper computer and used for storing the test result of the clock error.
Further, the error of the test clock in the clock test module is tested by the clock tester.
Further, the communication module is an RS485 communication module.
Furthermore, the ambient temperature of the intelligent electric meter detected in the temperature detection module is detected through a temperature probe, and the temperature probe and the intelligent electric meter are arranged in the environmental test chamber.
Furthermore, the system also comprises a power supply module, wherein the power supply module is arranged in the control box and provides electric energy for the whole system.
Compared with the prior art, the utility model has the advantages of it is following:
1. the communication module is an RS485 interface, the RS485 information transmission speed is high, and the detection efficiency of the clock error adjustment test system is improved.
2. For the electric energy meter adopting the hard clock, the clock error adjusting test system can detect the clock error of the electric energy meter and test the environmental temperature influence.
3. For the electric energy meter adopting the soft clock, the clock error adjusting and testing system can detect, compensate and debug the clock error of the electric energy meter and simultaneously carry out the environmental temperature influence test.
4. The clock error adjustment test system also comprises a database, the upper computer is connected with the database through the communication device, the database is used for storing the working content of the electric energy meter detection device, the detection information of each electric energy meter can be recorded in the database, and the clock error detection data of the electric energy meters can be stored in the database through the communication device, so that the clock error adjustment test system is very convenient for operators to look up.
Drawings
Fig. 1 is a structural diagram of a clock error adjustment testing apparatus for an intelligent electric meter according to a first embodiment;
FIG. 2 is a schematic diagram of a host computer interface according to an embodiment;
FIG. 3 is a schematic diagram illustrating a system setup on an upper computer according to an embodiment;
fig. 4 is a schematic diagram of a configuration of a system according to an embodiment.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
The utility model aims at prior art's defect, a smart electric meter clock error timing test device is provided. The device aims to overcome the defect that the electric energy meter inspection device for detecting the daily timing error in the prior art is inconvenient to check strict requirements on the daily timing error, and realizes online debugging and testing of the daily timing error under the environmental condition of-25-60 ℃.
It should be noted that the present invention is an improvement of the line structure and structure, and is not an improvement of the method, and the implementation of detection, reception, transmission, processing, display, test, etc. proposed in the following contents is the prior art, and is not the contents to be improved by the present invention.
Example one
It should be noted that the electric meter and the electric energy meter in this embodiment are smart meters.
The utility model provides a smart electric meter clock error timing test device of embodiment, as shown in fig. 1, includes: the device comprises an upper computer, a temperature detection module, a clock test module, a pulse per second driving module, a data processing and error display module, a communication module and a power supply module; the upper computer is connected with the temperature detection module, the clock test module, the pulse per second drive module and the data processing and error display module through the communication module.
And the power supply module is used for supplying electric energy to the whole system.
The temperature detection module is used for detecting the ambient temperature of the intelligent ammeter; the ambient temperature of the smart meter is detected through the temperature probe.
The second pulse driving module and the clock testing module are used for connecting the second pulse output by the intelligent electric energy meter into the clock testing module when the ambient temperature of the intelligent electric energy meter is detected; wherein the error of the test clock is tested by the clock tester.
And the clock testing module is connected with the data processing and error display module and used for receiving the pulse output by the pulse per second driving module, testing the error of the clock and sending the test result to the data processing and error display module.
And the data processing and error display module is used for receiving the test result of the clock error sent by the clock test module and displaying the test result through the upper computer.
In this embodiment, the communication module is an RS485 communication module, i.e., the upper computer is connected with the temperature detection module, the clock test module, the pulse-per-second drive module, the data processing module and the error display module through the RS485 communication module.
In the embodiment, the device comprises a control box and an environmental test box; the temperature detection module, the clock test module, the pulse per second drive module, the data processing and error display module, the communication module and the power supply module are arranged in the control box; the temperature probe and the electric energy meters are arranged in an environment test box.
The electric energy meter is connected with the control box through a serial port communication interface (such as a COM interface), the upper computer is connected with the control box through the serial port communication interface (such as the COM interface), the meter position of the electric energy meter is judged through the RS485 communication module in the embodiment, the meter address setting is carried out on the electric energy meter with the meter position, and the clock error of the error displayer corresponding to the electric energy meter with each meter position is automatically read subsequently is set.
Connection and detection by this embodiment:
for the electric energy meter adopting the hard clock, the clock error adjusting test system can detect the clock error of the electric energy meter and test the environmental temperature influence.
For the electric energy meter adopting the soft clock, the clock error adjusting and testing system can detect, compensate and debug the clock error of the electric energy meter and simultaneously carry out the environmental temperature influence test.
Wherein, the hard clock is a real-time clock chip. The time, minute and second can be generated without the intervention of a singlechip; calendar data of year, month, day, etc. automatically correcting the year.
The soft clock is used to provide time stamps, early computers opened up several units in memory, which were used as year, month, day, hour, minute and second counters, and provided with a timing generator, which output a pulse in about 55ms as an interrupt request, and during the interrupt service routine, these time and date counters were modified. Such time stamps, which are mainly provided by software, are called soft clocks.
In this embodiment, the test device further includes a data storage module, connected to the upper computer, for storing the test result of the clock error.
The upper computer is connected with the database through the serial port communication interface, and the clock error detection data of the electric energy meter are stored in the database through the serial port communication interface, so that the operation personnel can look up the clock error detection data conveniently.
The operation of the upper computer to the clock error adjustment test of the intelligent electric meter is specifically described in the embodiment:
it should be noted that the system described below is a device for testing clock error adjustment of an intelligent electric meter.
First, as shown in fig. 2, the setting of the host interface of the upper computer is shown.
The area A is a menu and a shortcut toolbar, and when a link of a function module in the area A is clicked, the link can enter a main interface of a corresponding module for the operation of the process; the area B is a scheme directory tree and is used for test process state control, test result calculation and report output; the area C is an item display area and displays different interfaces according to different proceeding states; the D area is a test operation bar, is sequentially carried out from left to right, can execute the next step only after the operation of the previous step is completed, and can also prompt the current process state and some abnormal information.
Secondly, as shown in fig. 3, the system is set on an upper computer.
1. Setting a communication interface (COM interface): an RS485 bus of the ammeter, an RS485 communication of a temperature detection module and an RS485 communication of an error display module (a test motherboard);
2. the communication rate (communication baud rate) is set.
And setting related parameters on a system setting interface, such as: as shown in fig. 3, the number of electric energy meters is 3, the calibration retry number is 3, the temperature accuracy is ± 5 degrees, the clock calibration method is one-to-one, and the adjustment waiting time is 15 s.
The system in this embodiment supports multiple electric energy meters. In addition, other types of electric energy meter inspection devices can be expanded as required in the future. The environmental test chambers currently support two sets of environmental test chambers in the current laboratory according to the configuration of the laboratory, and the later period can be similarly expanded.
Thirdly, the system is configured as shown in fig. 4.
1. Configuration temperature: 25 ℃ below zero, 25 ℃ below zero and 60 ℃ (each temperature point can be freely configured according to the test requirements); the temperature in the environmental test chamber is configured to be the ambient temperature to be detected.
2. Configuring a clock error value; and presetting a clock error threshold, and if the result obtained after the detection exceeds the clock error threshold, judging that the product is unqualified.
3. Configuring the time for temperature stabilization; the purpose of setting the time at which each temperature is stable is to measure the clock accuracy of the power meter.
4. Configuring the clock error test times; which corresponds to the above-set calibration retry number in order to make the clock test of the power meter accurate.
As shown in fig. 4, after the system enters a scenario editing interface, a scenario tree is established according to test requirements, the scenario tree is divided into a plurality of nodes, each node can configure related parameters according to its type, and generally includes an environmental condition node and an electric energy meter metering performance test node, the environmental condition node is used for setting parameters of an environmental test box and giving operating environmental test conditions of the electric energy meter, the electric energy meter metering performance test node is used for setting error test points of the electric energy meter, and specifying parameters such as voltage, current, frequency (for the alternating current electric energy meter), power factor (for the alternating current electric energy meter), and giving load conditions of the electric energy meter.
And fourthly, detecting a communication module in the system.
The detection comprises the steps of detecting whether the communication between the upper computer and the electric energy meter is normal or not; detecting whether the communication between the upper computer and the data processing and error display module is normal or not; and detecting whether the communication between the upper computer and the temperature detection module is normal or not. If the result is normal, executing the next step; if not, the detection is stopped.
And fifthly, selecting the electric energy meter.
Specifically, the number and the position of the detected electric energy meters and the checking of the meter addresses of the meters are determined.
And sixthly, selecting specific test contents.
The test contents comprise: testing clock error, adjusting clock error (adjustment is also called debugging, mainly aiming at the product which adopts soft clock and adjusts software, and compensates and adjusts the clock error to be out of tolerance so as to control the clock error within the preset error limit.)
If the selected test content is the test of the clock error, executing the seventh step; and if the selected test content is clock error adjustment, executing the eighth step.
And seventhly, if the content of the selected test is the test of the clock error, executing the following operation.
The method comprises the steps of entering a test interface of the electric energy meter, namely a movable interface in a host interface of a host computer, carrying out full-automatic test and single-step debugging test, carrying out the test step by step according to a set test scheme according to projects, obtaining error data of an electric energy meter inspection device and temperature data of an environmental test box, setting intelligent judgment in the test process, calculating the shortest time for obtaining errors, controlling the error stability by using a standard deviation limit value, eliminating gross errors and obtaining an accurate test result. After the full-automatic test is finished, all current test data can be inquired on a test result page, tables and charts can be given for visual display and judgment, and in addition, the conformity judgment can be carried out according to standards, technical specifications and limit values given in a factory.
If a clock error threshold is preset: and setting the limit value to be less than or equal to 0.02, and judging that the clock error data is unqualified when the clock error data exceeds 0.02. When the corresponding clock error data exceeds the preset clock error threshold, the upper computer interface adopts red display and prompt, so that the attention of detection personnel is facilitated and reminded.
And eighthly, if the content of the selection test is clock error adjustment, executing the following operation.
If a clock error threshold is preset: and setting the limit value to be less than or equal to 0.02, and judging that the clock error data is unqualified when the clock error data exceeds 0.02.
Mainly aims at a product which can be subjected to software trimming, namely a soft clock, and performs compensation trimming when clock error data exceeds a preset clock error threshold value so as to control the clock error data within a preset error limit.
1. The clock error calibration is respectively set to be at normal temperature of 25 ℃, low temperature of 25 ℃ and high temperature of 60 ℃.
2. After clicking start, the system automatically tests the clock error at the points of normal temperature of 25 ℃, low temperature of 25 ℃ and high temperature of 60 ℃ respectively, then reads the existing error value, and automatically gives a compensation value to adjust the clock error.
And ninthly, querying data.
And storing the clock error data obtained by the test into a database.
1. Inquiring clock error data before and after trimming;
2. inquiring clock error data tested at each time point;
the system software has the function of outputting the original error data and the environment data in the database according to a preset report format. After inputting relevant contents such as sample information, test conditions and the like, the system automatically generates an environment adaptability test report, and the report can be stored and printed in various ways such as pdf, rtf, xls and the like. The error performance conditions of the electric energy meter under different environmental conditions are displayed in the report in the form of a data table and a trend chart, and the data analysis and research on the environmental climate adaptability of the electric energy meter are facilitated.
The method and the device measure the clock accuracy of the electric energy meter under different environmental conditions, realize automatic test of the clock accuracy of the electric energy meter and intelligent analysis and processing of test results, and output original data and analysis result documents.
The technical characteristics of this embodiment:
a) the device has good compatibility: the system is provided with a built-in device for supporting various electric energy meter inspection devices and a high-low temperature box (namely an environmental test box), wherein the KP-S1000 electric energy meter inspection device is used as a main inspection device of the alternating current electric energy meter. The same model inspection equipment supports different numbers of epitope settings, and meets the actual use requirements.
b) The method has good expansibility: unified interface functions are defined, such as a power source output interface, a monitoring instrument interface and an error processing interface of the electric energy meter inspection device, temperature reading, temperature setting and state starting and stopping interfaces of a high-low temperature box (namely an environmental test box), and dll files are automatically identified by adopting a c # reflection technology to call the interface functions. When a new device is expanded, only coding is needed according to an interface, a dynamic link library is generated, dll files are placed into corresponding directories, and the system can automatically recognize the dll files.
c) Using a ribbon style interface: the multiple areas are divided according to functions, the use is simple and easy to understand, and the number, the size and the layout of the interface areas can be defined according to user habits; in addition, the ribbon theme can freely switch, is applicable to different use styles of different users.
d) Scheme free editing: the system designs a set of table-checking scheme editing function with high operation freedom degree, and is used for meeting different detection requirements. The design mode takes the basic module written by the program and the 'atomic function' required in practical application as correspondence, the functions are presented in a visual mode, a user can freely combine to form a new function through simple operation, and the platform type design concept is met. The editing mode of the test scheme can carry out conventional detection according to standards and technical specifications, and is also very suitable for enterprises to carry out research and development tests, thorough tests and nonstandard tests.
Compared with the prior art, the beneficial effect of this embodiment is:
1. the communication module is an RS485 interface, the RS485 information transmission speed is high, and the detection efficiency of the clock error adjustment test system is improved.
2. For the electric energy meter adopting the hard clock, the clock error adjusting test system can detect the clock error of the electric energy meter and test the environmental temperature influence.
3. For the electric energy meter adopting the soft clock, the clock error adjusting and testing system can detect, compensate and debug the clock error of the electric energy meter and simultaneously carry out the environmental temperature influence test.
4. The clock error that shows in clock error timing test system's host computer software surpasss can the automatic display red when presetting good error limit value, reminds operating personnel to be convenient for discover, and operating personnel need not to watch the display always and monitors clock error timing test system to electric energy meter clock error debugging result, and it is very convenient to use. The method is convenient for operators to reject defective products or carry out further debugging compensation work, so that the clock error of the electric energy meter adopting the soft clock is debugged and compensated to an optimal value.
5. The clock error adjustment test system also comprises a database, the upper computer is connected with the database through the communication device, the database is used for storing the working content of the electric energy meter detection device, the detection information of each electric energy meter can be recorded in the database, and the clock error detection data of the electric energy meters can be stored in the database through the communication device, so that the clock error adjustment test system is very convenient for operators to look up.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. The utility model provides a smart electric meter clock error timing test device, includes environmental test case, control box, its characterized in that still includes: the device comprises an upper computer, a temperature detection module, a clock test module, a pulse per second driving module, a data processing and error display module and a communication module; the temperature detection module, the clock test module, the pulse per second drive module, the data processing and error display module and the communication module are placed in the control box, and the upper computer is connected with the temperature detection module, the clock test module, the pulse per second drive module and the data processing and error display module through the communication module.
2. The device as claimed in claim 1, wherein the pulse per second driving module is connected to the clock testing module, and the pulse per second driving module is configured to connect the pulse per second output from the smart meter to the clock testing module.
3. The device as claimed in claim 2, wherein the clock testing module is connected to the data processing and error display module, receives the pulse output from the pulse-per-second driving module, tests the clock error, and sends the test result to the data processing and error display module.
4. The device as claimed in claim 3, wherein the data processing and error display module receives a test result of the clock error sent by the clock test module, and displays the test result through the upper computer.
5. The device according to claim 1, wherein the temperature detection module detects ambient temperature of the smart meter.
6. The device according to claim 4, further comprising a data storage module, wherein the data storage module is connected to the upper computer and stores a test result of the clock error.
7. The device as claimed in claim 3, wherein the error of the test clock in the clock test module is tested by a clock tester.
8. The device as claimed in claim 4, wherein the communication module is an RS485 communication module.
9. The device according to claim 5, wherein the temperature of the ambient environment of the smart meter detected by the temperature detection module is detected by a temperature probe, and the temperature probe and the smart meter are placed in an environmental test chamber.
10. The device for testing clock error adjustment of the smart meter according to claim 1, further comprising a power module, wherein the power module is disposed in the control box and provides power for the whole system.
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| CN110837073A (en) * | 2019-10-21 | 2020-02-25 | 浙江恒业电子有限公司 | Intelligent ammeter clock error adjustment test system and method |
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| CN110837073A (en) * | 2019-10-21 | 2020-02-25 | 浙江恒业电子有限公司 | Intelligent ammeter clock error adjustment test system and method |
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Address after: No. 1818, Xingping 1st Road, Pinghu Economic Development Zone, Jiaxing City, Zhejiang Province, 314200 Patentee after: Zhejiang Hengye Electronics Co.,Ltd. Address before: No. 1818, Xingping 1st Road, Pinghu Economic Development Zone, Jiaxing City, Zhejiang Province, 314200 Patentee before: ZHEJIANG HENGYE ELECTRONIC Co.,Ltd. |