A kind of electric energy meter detection device and detection method based on spectrum sensor

Abstract

The present invention discloses an electric energy meter detection device and detection method based on a spectrum sensor. The detection device includes a main control unit, a three-phase AC standard source, a spectrum sensor, a main control single-chip computer and an error calculation device. During detection, the main control unit controls the three-phase AC standard source to output an electrical signal of a rated power to the electric energy meter to be tested, and at the same time sends a high-frequency pulse signal matching the electrical signal to the error calculation device; the spectrum sensor collects the flickering light of the pulse indicator light of the electric energy meter to be tested to obtain spectrum data; the main control single-chip computer outputs a low-frequency pulse signal to the error calculation device according to the proportion of the color of the pulse indicator light in the spectrum data; the error calculation device compares the high-frequency pulse signal with the low-frequency pulse signal to obtain the flicker error. The present invention can eliminate the interference of daily light, ambient light, etc. on the flicker detection of the indicator light, and improve the accuracy and credibility of the detection results.

Description

Technical Field

[0001] The invention relates to a device for detecting the flashing frequency of a pulse indicator light of an electric energy meter, and also relates to a method for detecting the flashing frequency of the pulse indicator light thereof. Background Art

[0002] The flashing frequency of the pulse indicator light of the energy meter is related to the collected electrical signal. Before leaving the factory, the flashing frequency of the indicator light needs to be tested to determine whether the running speed of the energy meter meets the requirements.

[0003] At present, the method of detecting the flashing frequency of pulse indicator lights is to use photodiodes for pulse flashing identification. Although this solution can realize the collection of flashing under ideal experimental conditions, since photodiodes can only identify the flashing state by sensing the intensity of light, it cannot avoid and solve the deviation and interference caused by daily light sources and ambient light changes on the detection results, so the accuracy and credibility of the detection results are poor. Summary of the invention

[0004] The present invention proposes an electric energy meter detection device and a detection method based on a spectrum sensor, the purpose of which is to eliminate the interference of daily light, ambient light and the like on the flashing detection of an indicator light.

[0005] The technical solution of the present invention is as follows:

[0006] A power meter detection device based on a spectrum sensor includes a three-phase AC standard source for outputting rated power to the power meter to be tested, a main control unit, a spectrum sensor, a spectrum data processing unit and an error calculation device;

[0007] The main control unit is used to control the three-phase AC standard source to output an electrical signal to the electric energy meter to be tested, and to output a high-frequency pulse signal matching the electrical signal to the error calculation device;

[0008] The spectrum sensor is arranged in front of the pulse indicator light of the electric energy meter to be tested, and is used to collect the flickering light spectrum of the pulse indicator light;

[0009] The spectral data processing unit is connected to the spectral sensor and is used to generate a low-frequency pulse signal matching the flickering state according to the spectral data collected by the spectral sensor;

[0010] The error calculation device is connected to the main control unit and the spectrum data processing unit respectively, and is used to compare the high-frequency pulse signal with the low-frequency pulse signal to obtain the flicker error of the pulse indicator light.

[0011] As a further improvement of the electric energy meter detection device: the spectrum sensor has multiple visible light channels integrated therein for collecting spectrum data of visible light information of different colors.

[0012] As a further improvement of the electric energy meter detection device: the spectrum data processing unit is internally integrated with a pulse conversion unit, and the error calculation device is internally integrated with a pulse processing unit.

[0013] As a further improvement of the electric energy meter detection device: it also includes a host computer and a communication unit; the host computer is connected to the main control unit on the one hand, for sending a detection command to the main control unit, and is also connected to the error calculation device through the communication unit, for obtaining and displaying the flicker error.

[0014] As a further improvement of the electric energy meter detection device: the communication unit includes at least one serial port server, which is used to realize the communication connection between the host computer and the error calculation devices corresponding to the multiple electric energy meters to be tested.

[0015] As a further improvement of the electric energy meter detection device: it also includes a display device connected to the error calculation device, which is used to display the flicker error.

[0016] The present invention also discloses an electric energy meter detection method based on a spectrum sensor, the steps are:

[0017] Step 1: The main control unit controls the three-phase AC standard source to output a rated power electrical signal to the electric energy meter to be tested, and at the same time sends a high-frequency pulse signal matching the electrical signal to the error calculation device;

[0018] Step 2: The spectrum sensor collects the flashing light of the pulse indicator light of the electric energy meter to be tested to obtain spectrum data;

[0019] Step 3, the spectrum data processing unit outputs a low-frequency pulse signal to the error calculation device according to the proportion of the color of the pulse indicator light in the spectrum data;

[0020] Step 4: The error calculation device compares the high-frequency pulse signal with the low-frequency pulse signal to obtain a flicker error.

[0021] As a further improvement of the electric energy meter detection method: in step 3, when the proportion of the pulse indicator light color in the spectral data is greater than the preset threshold, the spectral data processing unit outputs a high-level signal; when the proportion of the pulse indicator light color in the spectral data is less than or equal to the preset threshold, the spectral data processing unit outputs a low-level signal.

[0022] As a further improvement of the electric energy meter detection method: before using the spectrum sensor to collect data, the collection color range of the spectrum sensor is selected according to the color of the pulse indicator light.

[0023] As a further improvement of the electric energy meter detection method: in step 4, the error calculation device records the number m of pulses of the high-frequency pulse signal in a low-frequency pulse signal cycle, and then calculates the flicker error according to the following formula:

[0024]

[0025] Among them, m0 is the calculated value of the number of pulses of the electric energy meter to be tested, C H is the pulse constant of the three-phase AC standard source, C L is the pulse constant of the electric energy meter to be tested;

[0026] When γ>0, it means that the electric energy meter to be tested moves fast; when γ≤0, it means that the electric energy meter to be tested moves slowly.

[0027] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention collects flicker light through a spectral sensor. The spectral data includes not only the spectrum of the indicator light color, but also the spectrum of light sources such as ambient light. Then, a low-frequency pulse signal matching the flicker state is generated according to the proportion of the flicker light color in the spectral data, thereby eliminating the interference of other light sources on flicker detection and improving the accuracy and reliability of the detection results; (2) By comparing high-frequency and low-frequency pulse signals, the flicker frequency can be detected and judged, further improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the detection device of the present invention;

[0029] Figure 2 Schematic diagram of the detection method of the present invention. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is described in detail below with reference to the accompanying drawings:

[0031] like Figure 1 , an electric energy meter detection device based on a spectrum sensor, which includes a host computer, a communication unit, a main control unit, a three-phase AC standard source, a spectrum sensor, a main control microcontroller, an error calculation device and a panel display.

[0032] in:

[0033] The host computer is connected to the main control unit on the one hand, for sending a detection command to the main control unit; and is also connected to the error calculation device through a communication unit, for acquiring and displaying the flicker error calculated by the error calculation device.

[0034] The main control unit is used to control the three-phase AC standard source to output a rated power electrical signal to the electric energy meter to be tested, and to output a high-frequency pulse signal matching the electrical signal to the error calculation device.

[0035] The spectrum sensor integrates multiple visible light channels to collect spectrum data of visible light information of different colors. It is arranged in front of the pulse indicator light of the electric energy meter to be tested and is used to collect the flashing light spectrum of the pulse indicator light.

[0036] The main control single chip microcomputer serves as a spectrum data processing unit, is connected to the spectrum sensor, and has an internally integrated pulse conversion unit for generating a low-frequency pulse signal matching the flickering state according to the spectrum data collected by the spectrum sensor.

[0037] The error calculation device is connected to the main control unit and the spectrum data processing unit respectively, and has an internal integrated pulse processing unit for comparing the high-frequency pulse signal with the low-frequency pulse signal to obtain the flashing error of the pulse indicator light and calculate the power.

[0038] When multiple electric energy meters need to be tested simultaneously, the communication unit includes at least one serial port server, which is respectively connected to different error calculation devices. The host computer can receive the test data of different electric energy meters simultaneously.

[0039] Furthermore, it also includes a panel display connected to the error calculation device, which is used to display the calculated flicker error.

[0040] like Figure 2 , the specific detection method steps are:

[0041] Step 1: The host computer sends a detection command to the main control unit. The main control unit controls the three-phase AC standard source to accurately output an electrical signal of rated power to the electric energy meter to be tested, and at the same time sends a high-frequency pulse signal matching the electrical signal to the error calculation device.

[0042] Step 2: The spectral sensor collects the flashing light of the pulse indicator light of the electric energy meter to be tested, obtains spectral data, and uploads the spectral data to the main control microcontroller in real time through the internal integrated visible light channel.

[0043] Furthermore, before collecting, the color range of the spectrum sensor is selected according to the color of the pulse indicator light (generally red). The set collection color range should include the spectrum range corresponding to the color of the indicator light.

[0044] Step 3: The main control microcontroller reads the spectrum data and performs processing and analysis. Specifically, when the proportion of red in the spectrum data is greater than a preset threshold, the main control microcontroller outputs a high-level signal; when the proportion of red in the spectrum data is less than or equal to the preset threshold, the main control microcontroller outputs a low-level signal. The high and low level signals constitute the low-frequency pulse signal.

[0045] Step 4: The error calculation device compares the high-frequency pulse signal with the low-frequency pulse signal to obtain the flicker error. The specific method is:

[0046] The error calculation device records the number m of pulses of the high-frequency pulse signal in a low-frequency pulse signal cycle (such as from one rising edge of the low-frequency pulse signal to the next rising edge), and then calculates the flicker error according to the following formula:

[0047]

[0048] Among them, m0 is the calculated value of the number of pulses of the electric energy meter to be tested, C H is the pulse constant of the three-phase AC standard source, C L is the pulse constant of the electric energy meter to be tested.

[0049] It should be noted that the high-frequency pulse signal is the calibration reference of the low-frequency pulse signal, so when selecting the pulse constant of the three-phase AC standard source, it is recommended to limit it to: C H ≥C L ×10000, to ensure the accuracy of the identification results.

[0050] When γ>0, it means that the electric energy meter to be tested moves fast; when γ≤0, it means that the electric energy meter to be tested moves slowly.

[0051] Step 5: The test result output value is displayed on the panel display and uploaded to the host computer through the communication unit for display and storage.

Claims

1. An electric energy meter detection device based on a spectrum sensor, comprising a three-phase AC standard source for outputting a rated power to the electric energy meter to be tested, Features: It also includes a main control unit, a spectral sensor, a spectral data processing unit and an error calculation device; The main control unit is used to control the three-phase AC standard source to output an electrical signal to the electric energy meter to be tested, and to output a high-frequency pulse signal matching the electrical signal to the error calculation device; The spectrum sensor is arranged in front of the pulse indicator light of the electric energy meter to be tested, and is used to collect the flashing light spectrum of the pulse indicator light; the spectrum sensor integrates multiple visible light channels inside, and is used to collect spectrum data of visible light information of different colors; Before using the spectral sensor to collect data, select the collection color range of the spectral sensor according to the color of the pulse indicator light; The spectral data processing unit is connected to the spectral sensor and is used to generate a low-frequency pulse signal matching the flickering state according to the spectral data collected by the spectral sensor; The error calculation device is connected to the main control unit and the spectrum data processing unit respectively, and is used to compare the high-frequency pulse signal with the low-frequency pulse signal to obtain the flashing error of the pulse indicator light; the detection steps are: Step 1: The main control unit controls the three-phase AC standard source to output a rated power electrical signal to the electric energy meter to be tested, and at the same time sends a high-frequency pulse signal matching the electrical signal to the error calculation device; Step 2: The spectrum sensor collects the flashing light of the pulse indicator light of the electric energy meter to be tested to obtain spectrum data; Step 3, the spectrum data processing unit outputs a low-frequency pulse signal to the error calculation device according to the proportion of the color of the pulse indicator light in the spectrum data; When the proportion of the pulse indicator light color in the spectral data is greater than the preset threshold, the spectral data processing unit outputs a high level signal; when the proportion of the pulse indicator light color in the spectral data is less than or equal to the preset threshold, the spectral data processing unit outputs a low level signal; Step 4: The error calculation device compares the high-frequency pulse signal with the low-frequency pulse signal to obtain a flicker error; In step 4, the error calculation device records the number m of pulses of the high-frequency pulse signal in one period of the low-frequency pulse signal, and then calculates the flicker error according to the following formula: Among them, m 0 is the calculated value of the number of pulses of the electric energy meter to be tested, C H is the pulse constant of the three-phase AC standard source, C L is the pulse constant of the electric energy meter to be tested; When γ>0, it means that the electric energy meter to be tested moves fast; when γ≤0, it means that the electric energy meter to be tested moves slowly.

2. The electric energy meter detection device based on the spectrum sensor according to claim 1, Features: The spectrum data processing unit has a pulse conversion unit integrated therein, and the error calculation device has a pulse processing unit integrated therein.

3. The electric energy meter detection device based on a spectrum sensor as claimed in claim 1 or 2, Features: It also includes a host computer and a communication unit; the host computer is connected to the main control unit on the one hand, for sending a detection command to the main control unit, and is also connected to the error calculation device through the communication unit, for acquiring and displaying the flicker error.

4. The electric energy meter detection device based on the spectrum sensor as claimed in claim 3, Features: The communication unit includes at least one serial port server, which is used to realize the communication connection between the host computer and the error calculation devices corresponding to the multiple electric energy meters to be tested.

5. The electric energy meter detection device based on a spectrum sensor as claimed in claim 1 or 2, Features: It also includes a display device connected to the error calculation device, which is used to display the flicker error.

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