Distribution box data acquisition device and method

Abstract

The invention relates to the technical field of measuring instruments, in particular to a distribution box data acquisition device and method. The device comprises a non-contact current and voltage acquisition device and a hand-held terminal comprising an image acquisition module, a control module and a display module, and the image acquisition module is used for acquiring current and voltage when the non-contact current and voltage acquisition device is installed on a to-be-tested device in a distribution box. Acquiring an installation image including the installation position of the non-contact current and voltage acquisition equipment; the controller is used for acquiring an installation image and a pre-stored target image of to-be-tested equipment marked with an optimal data acquisition position; a feature point matching algorithm is adopted to determine the transformation relation between the target image and the installation image, the distance between the optimal data acquisition position and the installation position is determined according to the transformation relation, and when the distance is not in a preset distance interval, the optimal data acquisition position is marked on the installation image; and the display module is used for displaying the installation image marked with the optimal data acquisition position, so that the data acquisition precision of the distribution box is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring instruments, and in particular to a data acquisition device and method for a distribution box. Background Art

[0002] In the field of low-voltage power distribution and operation and maintenance, when power maintenance is required, operation and maintenance personnel often need to measure the current and voltage of the internal circuit of the distribution box in order to adopt corresponding adjustments and processing measures. For example, current measurements of the main distribution circuit and branch circuits can be used to determine the changes and peak values ​​of the power load, and timely guide load adjustments.

[0003] At present, the most commonly used measuring device in low-voltage power distribution sites is the current clamp meter. When measuring current, the clamp meter needs to clamp the wire to be measured, which is often difficult to collect current and voltage in a distribution box with a small space. Even if some small sensors are used for collection, it is difficult to determine the collection position due to the small space of the distribution box, resulting in large errors in the collected data. Therefore, it is necessary to propose a new data collection device suitable for distribution boxes with small spaces. Summary of the invention

[0004] The present invention provides a distribution box data acquisition device and method, which are used to improve the current data and voltage data acquisition accuracy of the distribution box.

[0005] On one hand, the present invention provides a data acquisition device for a distribution box, comprising: a handheld terminal and a non-contact current and voltage acquisition device; the handheld terminal comprises: a controller, an image acquisition module, and a display module;

[0006] The image acquisition module and the display module are connected to the controller;

[0007] The image acquisition module is used to acquire an installation image including the installation position of the non-contact current and voltage acquisition device when the non-contact current and voltage acquisition device is installed on the device to be tested in the distribution box;

[0008] The controller is used to obtain the installation image and a pre-stored target image of the device to be tested, the target image being marked with an optimal data acquisition position; and using a feature point matching algorithm to determine a transformation relationship between the target image and the installation image, and based on the transformation relationship, determine a distance between the optimal data acquisition position and the installation position of the non-contact current and voltage acquisition device, and when the distance is not within a preset distance interval, mark the optimal data acquisition position on the installation image;

[0009] The display module is used to display the installation image with the optimal data collection position marked.

[0010] Optionally, the optimal data collection position is the position of the conductor center line of the device under test.

[0011] Optionally, the controller is specifically configured to respond to location information input by a user and acquire a target image of the device under test associated with the location information.

[0012] Optionally, the image acquisition module is used to acquire an original image of the device under test and transmit the original image to the controller;

[0013] The controller is used to mark the position of the conductor center line of the device under test in the original image to obtain a target image of the device under test, and obtain location information of the device under test, associate the location information of the device under test with the target image, and store the associated location information of the device under test and the target image in a storage module.

[0014] Optionally, the handheld terminal also includes a signal processing module, which is connected to the non-contact current and voltage acquisition device and the controller respectively, and is used to perform signal processing on the voltage data and current data collected by the non-contact current and voltage acquisition device, and transmit the processed voltage data and current data to the controller.

[0015] Optionally, the handheld terminal further includes a temperature acquisition module;

[0016] The temperature acquisition module is connected to the controller and is used to acquire the ambient temperature of the device to be tested and transmit the ambient temperature to the controller;

[0017] The controller is used to determine whether the ambient temperature is within a preset temperature threshold range. If so, output a start acquisition signal to the non-contact current and voltage acquisition device to enable the non-contact current and voltage acquisition device to perform an acquisition action. Otherwise, based on the comparison result between the ambient temperature and the preset temperature threshold range, a corresponding target temperature drift compensation model is determined, and the current data and voltage data collected by the non-contact current and voltage acquisition device are input into the target temperature drift compensation model to obtain compensated current data and voltage data.

[0018] Optionally, the controller is specifically configured to obtain a pre-trained first temperature drift compensation model as a target temperature drift compensation model when the temperature environment is less than a minimum value of the temperature threshold range.

[0019] Optionally, the controller is specifically configured to, when the temperature environment is less than a maximum value of the temperature threshold range, obtain a pre-trained second temperature drift compensation model as a target temperature drift compensation model.

[0020] Optionally, the handheld terminal further includes a communication module;

[0021] The controller is connected to the communication module and is connected to the server through the communication module, and is used to upload the data in the storage module to the server.

[0022] Another aspect of the present invention provides a distribution box data collection method, which is applied to the device as described in any one of the above items, and the method comprises:

[0023] When the non-contact current and voltage acquisition device is installed on the device to be tested in the distribution box, the image acquisition device acquires an installation image including the installation position of the non-contact current and voltage acquisition device;

[0024] The controller obtains the installation image and a pre-stored target image of the device to be tested, wherein the target image is marked with an optimal data acquisition position; and adopts a feature point matching algorithm to determine a transformation relationship between the target image and the installation image, and determines the distance between the optimal data acquisition position and the installation position of the non-contact current and voltage acquisition device according to the transformation relationship, and when the distance is not within a preset distance interval, marks the optimal data acquisition position on the installation image;

[0025] The display module shows an installation image with the optimal data collection position marked.

[0026] It can be seen from the above technical solutions that the present invention has the following advantages:

[0027] The present invention provides a distribution box data acquisition device, which includes: a handheld terminal and a non-contact current and voltage acquisition device; the handheld terminal includes: a controller, an image acquisition module, and a display module; the image acquisition module and the display module are connected to the controller; the image acquisition module is used to acquire an installation image containing the installation position of the non-contact current and voltage acquisition device when the non-contact current and voltage acquisition device is installed on the device to be tested in the distribution box; the controller is used to obtain the installation image and a pre-stored target image of the device to be tested, the target image is marked with an optimal data acquisition position; and a feature point matching algorithm is used to determine the transformation relationship between the target image and the installation image, and according to the transformation relationship, the distance between the optimal data acquisition position and the installation position of the non-contact current and voltage acquisition device is determined, and when the distance is not in a preset distance interval, the optimal data acquisition position is marked on the installation image; the display module is used to display the installation image with the optimal data acquisition position marked.

[0028] In the present invention, a non-contact current and voltage acquisition device is used to collect current data and voltage data, which reduces the difficulty of installing the acquisition device, so that it can better adapt to the operation requirements of a distribution box with a small space; the image acquisition module is used to collect an installation image containing the installation position of the non-contact current and voltage acquisition device when the non-contact current and voltage acquisition device is installed on the device to be tested in the distribution box, and the controller is used to obtain the installation image and a pre-stored target image of the device to be tested, and the target image is marked with an optimal data acquisition position; and a feature point matching algorithm is used to determine the transformation relationship between the target image and the installation image, and according to the transformation relationship, determine the distance between the optimal data acquisition position and the installation position of the non-contact current and voltage acquisition device. When the distance is not in a preset distance interval, The optimal data collection position is marked on the installation image; the display module is used to display the installation image with the optimal data collection position marked, so as to realize the judgment of the installation position of the non-contact current and voltage collection device, and when it is determined that the distance between the installation position of the non-contact current and voltage collection device and the optimal data collection position is not within the preset distance interval, the installation image with the optimal data collection position marked is displayed through the display module, so that the operation and maintenance personnel can more accurately adjust the installation position of the non-contact current and voltage collection device, and install the non-contact current and voltage collection device at the optimal collection position, thereby realizing more accurate current data and voltage data collection in a narrow distribution box, avoiding the deviation of the installation position of the collection device, resulting in large errors in the collected data, and improving the current data and voltage data collection accuracy of the distribution box. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 A schematic diagram of the structure of a data acquisition device for a distribution box provided by an embodiment of the present invention;

[0031] Figure 2 Another structural schematic diagram of a distribution box data acquisition device provided by an embodiment of the present invention;

[0032] Figure 3 A flow chart of the steps of a distribution box data collection method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The embodiments of the present invention provide a distribution box data collection device and method, which are used to improve the collection accuracy of current data and voltage data of the distribution box.

[0034] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1 to Figure 2 The present invention provides a distribution box data acquisition device, comprising: a handheld terminal 2 and a non-contact current and voltage acquisition device 1; the handheld terminal 2 comprises: a controller 21, an image acquisition module 22, and a display module 23; the image acquisition module 22 and the display module 23 are connected to the controller 21;

[0036] The image acquisition module 22 is used to acquire an installation image including the installation position of the non-contact current and voltage acquisition device 1 when the non-contact current and voltage acquisition device 1 is installed on the device to be tested in the distribution box;

[0037] The controller 21 is used to obtain an installation image and a pre-stored target image of the device to be tested, where the target image is marked with the optimal data acquisition position; and a feature point matching algorithm is used to determine the transformation relationship between the target image and the installation image, and based on the transformation relationship, the distance between the optimal data acquisition position and the installation position of the non-contact current and voltage acquisition device 1 is determined. When the distance is not within a preset distance interval, the optimal data acquisition position is marked on the installation image; the display module 23 is used to display the installation image with the optimal data acquisition position marked.

[0038] It should be noted that the contactless current and voltage acquisition device 1 is connected to the handheld terminal 2 for communication and is used to collect current data and voltage data in the distribution box. Among them, the contactless current and voltage acquisition device 1 uses a device that can measure current and voltage without direct contact with the conductor to be measured. The contactless current and voltage acquisition device 1 in this embodiment includes a U-shaped current sensor and a U-shaped voltage sensor, which can measure voltage and current without direct contact, so as to better adapt to the operation requirements of the distribution box with a small space, and avoid the problem that the existing measurement technology needs to use the test lead to contact the conductor to be measured when measuring voltage, which has safety hazards such as electric shock.

[0039] The optimal data collection position is used to indicate the position on the device under test where accurate data collection can be performed. A feature point matching algorithm is an image processing method for determining the correspondence between different images. In an example, a feature point matching algorithm such as SIFT, SURF, or ORB can be used.

[0040] In actual use, after the non-contact current and voltage acquisition device 1 is installed on the device to be tested in the distribution box, the image acquisition module 22 of the handheld terminal 2 is used to acquire an image of the installed non-contact current and voltage acquisition device 1 to obtain an installation image including the installation position of the non-contact current and voltage acquisition device 1. The image acquisition module 22 transmits the installation image to the controller 21, and the controller 21 receives the installation image and obtains a pre-stored image of the device to be tested with the optimal data acquisition position marked (i.e., the target image). Since there may be a shooting angle deviation between the target image and the installation image, in this embodiment, the controller 21 uses a feature point matching algorithm to match the installation image and the target image based on the feature points of the target image and the installation image, and determines the transformation relationship between the installation image and the target image based on the matching result, and determines the target position corresponding to the optimal data acquisition position in the installation image based on the transformation relationship, thereby realizing the determination of the optimal data acquisition position of the device to be tested in the installation image and reducing the situation where the image data is inaccurate due to the shooting angle deviation.

[0041] After determining the target position, the controller 21 calculates the distance between the target position and the installation position as the distance between the optimal data collection position and the installation position, and determines whether the distance is within a preset distance interval. If so, it indicates that the non-contact current and voltage acquisition device 1 has been installed in place, and accurate current data and voltage data can be collected. If not, it indicates that the non-contact current and voltage acquisition device 1 is not installed in place, and accurate current data and voltage data cannot be collected. Therefore, by marking the optimal data collection position on the installation image, and using the display module 23 to display the installation image with the optimal data collection position marked, the staff can intuitively determine the installation status of the non-contact current and voltage data acquisition device, as well as the distance from the optimal data collection position, thereby providing a convenient prompt for the staff to adjust the installation position of the non-contact current and voltage acquisition device 1 in a small distribution box, so that the staff can more accurately determine the optimal data collection position and adjust the installation of the non-contact current and voltage acquisition device 1, so that the non-contact current and voltage acquisition device 1 can be installed at the optimal data collection position, thereby improving the current data and voltage data collection accuracy of the non-contact current and voltage acquisition device 1.

[0042] In a specific embodiment, the optimal data collection position is the position of the conductor center line of the device under test.

[0043] It should be noted that the position of the conductor centerline refers to the position of a virtual straight line located at the geometric center of a conductor. The position of the conductor centerline can provide a reference for current distribution, a positioning reference for the installation and layout of electrical equipment, and a basis for calculating the conductor magnetic field. Therefore, the position of the conductor centerline of the device under test is used as the optimal data collection position, so that the current data and voltage data collected by the non-contact current and voltage acquisition device 1 can more accurately feedback the actual situation of the device under test, thereby improving the data acquisition accuracy of the non-contact current and voltage acquisition device 1.

[0044] In a specific embodiment, the controller 21 is specifically configured to respond to the location information input by the user and obtain a target image of the device under test associated with the location information.

[0045] It should be noted that, in actual use, the staff uses the prompt of the display module 23 to input the location information of the device to be tested. The display module 23 transmits the location information to the controller 21. The controller 21 obtains the corresponding target image of the device to be tested from the storage module 26 based on the location information of the device to be tested, thereby achieving accurate acquisition of the target image of the device to be tested.

[0046] It can be understood that in an actual working scenario, due to the large number of distribution boxes, a large number of images of the devices under test of each distribution box are stored in the storage module 26. This embodiment pre-associates location information and target images, and stores the association relationship in the storage module 26. When the target image needs to be retrieved, the target image of the corresponding device under test can be accurately retrieved based on the location information.

[0047] In one example, by numbering the distribution box and each device in the distribution box, and associating each device number, location information, and target image, more accurate target image retrieval can be achieved.

[0048] In a specific embodiment, the image acquisition module 22 is used to acquire the original image of the device under test and transmit the original image to the controller 21;

[0049] The controller 21 is used to mark the position of the conductor center line of the device under test in the original image, obtain the target image of the device under test, and obtain the location information of the device under test, associate the location information of the device under test with the target image, and store the associated location information and target image of the device under test in the storage module 26.

[0050] It should be noted that, in the initial stage, the image acquisition module 22 is used to acquire the image of the device under test in the distribution box (i.e., the original image), and the position of the conductor center line of the device under test is marked in the original image to obtain the target image, and the location information of the device under test is obtained, the location information of the device under test and the target image of the device under test are associated, and the association relationship, the location information of the device under test and the target image are stored in the storage module 26, thereby realizing the construction and storage of the target image.

[0051] In a specific embodiment, the handheld terminal 2 also includes a signal processing module 24, which is respectively connected to the non-contact current and voltage acquisition device 1 and the controller 21, and is used to perform signal processing on the voltage data and current data collected by the non-contact current and voltage acquisition device 1, and transmit the processed voltage data and current data to the controller 21.

[0052] It should be noted that signal processing includes filtering, amplification and analog-to-digital conversion, etc. After receiving the voltage data and current data after signal processing, the controller 21 transmits the voltage data and current data to the display module 23 for display, so that the staff can intuitively understand the voltage data and current data of the device under test.

[0053] In a specific embodiment, the display module 23 may have a touch function, and the staff can input text by voice or text. If the voice function is provided, the handheld terminal 2 is provided with a voice module.

[0054] In a specific embodiment, the handheld terminal 2 further includes a temperature acquisition module 25;

[0055] The temperature acquisition module 25 is connected to the controller 21 and is used to acquire the ambient temperature of the device under test and transmit the ambient temperature to the controller 21;

[0056] The controller 21 is used to determine whether the ambient temperature is within a preset temperature threshold range. If so, a start acquisition signal is output to the non-contact current and voltage acquisition device 1 to enable the non-contact current and voltage acquisition device 1 to perform an acquisition operation. Otherwise, a corresponding target temperature drift compensation model is determined based on a comparison result between the ambient temperature and the preset temperature threshold range, and the current data and voltage data collected by the non-contact current and voltage acquisition device 1 are input into the target temperature drift compensation model to obtain compensated current data and voltage data.

[0057] It should be noted that the target temperature drift compensation model is a model that is pre-trained and stored in the storage module 26, which is used to perform temperature drift compensation on the input current data and / or voltage data and output the compensated current data and / or voltage data. The temperature acquisition module 25 can be a temperature sensor.

[0058] In this embodiment, the temperature acquisition module 25 is used to collect the ambient temperature of the device to be tested and to determine whether the ambient temperature is within a preset temperature threshold range. If so, it indicates that the current temperature environment has little interference with the non-contact current and voltage acquisition device 1. At this time, the controller 21 can output a start acquisition signal to the non-contact current and voltage acquisition device 1, so that the non-contact current and voltage acquisition device 1 performs voltage data acquisition and / or current data acquisition. After that, the signal processing module 24 receives the voltage data and current data collected by the non-contact current and voltage acquisition device 1, and after performing signal processing on the voltage data and / or current data, outputs the processed voltage data and / or current data to the storage module 26 and the display module 23 for storage and display.

[0059] If the ambient temperature is not within the preset temperature threshold range, it means that the current ambient temperature of the device under test may interfere with the data accuracy of the non-contact current and voltage acquisition device 1. At this time, by comparing the current ambient temperature with the maximum and minimum values ​​of the temperature threshold range, the corresponding target temperature drift compensation model is determined according to the comparison result, and the target temperature drift compensation model is used to perform temperature compensation on the non-contact voltage and current data, thereby avoiding the problem of inaccurate measurement values ​​caused by temperature drift and further improving the accuracy of the collected distribution box data.

[0060] In a specific embodiment, the controller 21 is specifically configured to obtain a pre-trained first temperature drift compensation model as a target temperature drift compensation model when the temperature environment is less than a minimum value of a temperature threshold range.

[0061] It should be noted that the present embodiment pre-constructs and trains a first temperature drift compensation model for temperature compensation of the current data / voltage data collected by the non-contact current and voltage acquisition device 1 in a scenario where the ambient temperature value is less than the minimum value of the preset range of the temperature threshold. There may be two first temperature drift compensation models, which are used to perform temperature compensation on the current data and the voltage data, respectively.

[0062] Taking current data as an example, the training steps of the first temperature drift compensation model are as follows: first, construct an environment in which the temperature is less than the minimum value of the preset temperature range, and collect the current data of the device to be tested in this environment as a training sample; then, construct an environment within the preset temperature threshold range, and collect the current data of the device to be tested in this environment as a target sample; and form data pairs with multiple groups of training samples and multiple groups of target samples, and input the training samples into the initial neural network model, output the predicted compensation value, calculate the loss value between the target sample and the predicted compensation value, and optimize the neural network model through the loss value until the neural network model meets the set minimum error, and output the neural network model as the first temperature drift compensation model.

[0063] In a specific embodiment, the controller 21 is specifically configured to, when the temperature environment is less than a maximum value of the temperature threshold range, obtain a pre-trained second temperature drift compensation model as a target temperature drift compensation model.

[0064] It should be noted that the present embodiment pre-constructs and trains a second temperature drift compensation model for temperature compensation of the current data / voltage data collected by the non-contact current and voltage acquisition device 1 in a scenario where the ambient temperature value is greater than the minimum value of the preset range of the temperature threshold. There may be two second temperature drift compensation models, which are used to perform temperature compensation on the current data and the voltage data, respectively.

[0065] Taking current data as an example, the training steps of the second temperature drift compensation model are as follows: first, construct an environment in which the temperature is greater than the maximum value of the preset temperature range, and collect the current data of the device to be tested in this environment as a training sample; then, construct an environment within the preset temperature threshold range, and collect the current data of the device to be tested in this environment as a target sample; and form data pairs with multiple groups of training samples and multiple groups of target samples, and input the training samples into the initial neural network model, output the predicted compensation value, calculate the loss value between the target sample and the predicted compensation value, optimize the neural network model through the loss value, and optimize the neural network model until the set minimum error is met, and output the neural network model as the second temperature drift compensation model.

[0066] In another preferred embodiment, it is also possible to construct a simulation experiment, use multiple sets of experimental data collected by non-contact current and voltage, and determine the temperature compensation coefficient by the least squares fitting method for the multiple sets of experimental data. Based on the temperature compensation coefficient, the temperature drift formula is used to determine the actual voltage data or actual current data collected by the non-contact current and voltage for compensation, and obtain the compensated voltage data and current data, so as to further improve the data collection accuracy of the distribution box.

[0067] In a specific implementation, the temperature threshold range can be set according to the standard working environment temperature of the non-contact current and voltage acquisition device 1 .

[0068] In a specific embodiment, the handheld terminal 2 further includes a communication module;

[0069] The controller 21 is connected to the communication module and connected to the server through the communication module, and is used to upload the data in the storage module 26 to the server.

[0070] It should be noted that the communication module can be wired communication or wireless communication, such as WIFI communication. The communication module is used to transmit the stored data to the server. The server can be a cloud server or a computer terminal.

[0071] In a specific embodiment, a U-shaped current sensor may be used to measure the current value first, or a U-shaped voltage sensor may be used to measure the voltage value first. This embodiment does not specifically limit the measurement order.

[0072] In a specific embodiment, after obtaining the current value and the voltage value, the controller 21 may also be used to calculate the power using the obtained current value and voltage value, and display the current value, voltage value and power on the display module 23 .

[0073] In a specific embodiment, the controller 21 is also used to store the location information, current value, voltage value and power of the device to be tested in the storage module 26, thereby effectively recording the location and measurement values ​​of the device to be tested, facilitating subsequent analysis and use, and avoiding the problem that existing commercially available clamp meters do not have data recording capabilities and are difficult to meet business requirements in scenarios such as synchronous measurement of low-voltage substation loads.

[0074] In a specific embodiment, the handheld terminal 2 further includes a voice module for providing a voice function. For example, a staff member can use the voice module for voice input.

[0075] In a specific embodiment, the storage module 26 is used to store text input by the staff, captured images, data processed by the signal processing module 24, matched image data, etc., to provide data support for subsequent analysis.

[0076] In a specific embodiment, the image acquisition module 22 can also be used to collect the user's facial information, and the controller 21 can be used to perform facial recognition on the facial information and output the recognition result.

[0077] In an application example, the workflow of the device can be as follows:

[0078] After the staff arrives at the device to be tested, they enter the location on the display module 23 of the handheld terminal 2. The display module 23 sends the location information to the controller 21. The controller 21 retrieves the staff information of the device to be tested based on the received location information, displays it on the display module 23, and prompts the staff to perform identity recognition operations. After the staff clicks the option to confirm the recognition on the display module 23, the controller 21 takes a facial photo of the staff through the camera, and the camera sends the taken facial photo to the controller 21. The controller 21 verifies the facial photo. After the face recognition is passed, a text such as "passed" is displayed on the display module 23 to prompt the staff to perform current and voltage measurements.

[0079] Afterwards, the staff installs the U-shaped current sensor and the U-shaped voltage sensor on the device to be tested. Taking the U-shaped current sensor as an example, since the inaccurate installation position of the U-shaped current sensor and the U-shaped voltage sensor may easily lead to inaccurate measured current and voltage, after the U-shaped current sensor is installed on the device to be tested, the controller 21 displays a prompt message on the display module 23, such as "Use a camera to capture the installation status" or "Take a photo directly in front of the U-shaped current sensor". Afterwards, the controller 21 obtains the device photo taken by the camera, and obtains the pre-stored target image of the device based on the location information. Since there may be an angle deviation between the image taken by the staff and the pre-stored image. According to the feature points (such as corner points, intersection points, edge points) in the above two images, the feature point matching algorithm (such as SIFT, SURF, ORB, etc.) is used to match the above two images to determine the transformation relationship between the two images. According to the transformation relationship, the target position of the center line position in the captured image (i.e., the installation image) is determined. After that, the controller 21 determines whether the distance between the U-shaped current sensor and the target position is within the preset interval. If it is not within the preset interval, the target position in the captured image is displayed on the display module 23 to instruct the staff to reinstall the sensor. If so, the controller 21 collects the temperature of the environment in which the device to be tested is located (i.e., the ambient temperature) through the temperature acquisition module 25. When the ambient temperature is within the preset temperature range, the controller 21 controls the U-shaped current sensor to collect the current value, and the signal processing module 24 performs corresponding signal processing on the collected current value, and then stores the processed current value in the storage module 26, and finally displays it on the display module 23 together with the voltage value.

[0080] When the ambient temperature is not within the preset temperature threshold range, it indicates that the ambient temperature does not meet the working environment of the U-type current sensor and there is temperature drift. Therefore, the corresponding temperature drift compensation model is determined according to the ambient temperature. The controller 21 uses the temperature drift compensation model to perform temperature compensation calculation on the current value collected by the U-type current sensor, avoiding the situation where the measured value is inaccurate due to temperature drift and improving the data accuracy. Afterwards, the signal processing module 24 performs corresponding processing on the compensated current value, and then stores the processed current value in the storage module 26, and finally displays it on the display module 23 together with the voltage value.

[0081] In the present invention, the controller obtains the installation image and the pre-stored target image of the device to be tested, and uses the feature point matching algorithm to determine the transformation relationship between the target image and the installation image, and determines the distance between the optimal data acquisition position and the installation position of the non-contact current and voltage acquisition device according to the transformation relationship. When the distance is not in the preset distance interval, the optimal data acquisition position is marked on the installation image, and the accuracy of the installation position of the U-shaped voltage / current sensor is judged, providing technical support for accurate installation, thereby ensuring the accuracy of voltage and current measurement, and avoiding the situation where the deviation of the installation of the U-shaped voltage and current sensor will lead to inaccurate voltage and current measurement. And after determining that the position is correctly installed, the ambient temperature is further measured, and the measured value is temperature compensated, avoiding the problem of inaccurate measurement values ​​caused by temperature drift. Therefore, the device provided by the present invention first judges and adjusts the installation position of the U-shaped voltage / current sensor, and further judges the environment in which the U-shaped voltage / current sensor is located, thereby avoiding the influence of the installation position and temperature on the measurement results of the U-shaped voltage / current sensor, thereby improving the accuracy of the measurement results of the U-shaped voltage / current sensor, and therefore, improving the overall collection accuracy of the distribution box data.

[0082] See also Figure 3 The present invention provides a distribution box data collection method, which is applied to the device of any of the above embodiments, and the method includes:

[0083] 101. When the non-contact current and voltage acquisition device is installed on the device to be tested in the distribution box, the image acquisition device acquires an installation image including the installation position of the non-contact current and voltage acquisition device;

[0084] 102. The controller obtains the installation image and the pre-stored target image of the device to be tested, where the target image is marked with the optimal data collection position; and uses a feature point matching algorithm to determine the transformation relationship between the target image and the installation image, and determines the distance between the optimal data collection position and the installation position of the non-contact current and voltage collection device based on the transformation relationship. When the distance is not within the preset distance interval, the optimal data collection position is marked on the installation image;

[0085] 103. The display module displays the installation image with the optimal data collection position marked.

[0086] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0087] In this embodiment, when the non-contact current and voltage acquisition device is installed on the device to be tested in the distribution box, the image acquisition device acquires an installation image including the installation position of the non-contact current and voltage acquisition device, and the controller obtains the installation image and a pre-stored target image of the device to be tested; and adopts a feature point matching algorithm to determine the transformation relationship between the target image and the installation image, and according to the transformation relationship, determines the distance between the optimal data acquisition position and the installation position of the non-contact current and voltage acquisition device. When the distance is not within the preset distance interval, the optimal data acquisition position is marked on the installation image, and the display module displays the installation image with the optimal data acquisition position marked, so that the operation and maintenance personnel can more accurately adjust the installation position of the non-contact current and voltage acquisition device, and install the non-contact current and voltage acquisition device at the optimal acquisition position, thereby realizing more accurate current data and voltage data acquisition in a narrow distribution box, avoiding deviations in the installation position of the acquisition device, resulting in large errors in the collected data, and improving the current data and voltage data acquisition accuracy of the distribution box.

[0088] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0089] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0090] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each functional unit may be physically separate, or two or more functional units may be integrated into one processing unit. The above integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0091] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0092] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0093] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A data acquisition device for a distribution box, characterized in that: include: Handheld terminals and contactless current and voltage acquisition equipment; The handheld terminal includes: a controller, an image acquisition module, and a display module; The image acquisition module and the display module are connected to the controller; The image acquisition module is used to acquire an installation image including the installation position of the non-contact current and voltage acquisition device when the non-contact current and voltage acquisition device is installed on the device to be tested in the distribution box; The controller is used to obtain the installation image and a pre-stored target image of the device to be tested, the target image being marked with an optimal data acquisition position; and using a feature point matching algorithm to determine a transformation relationship between the target image and the installation image, and based on the transformation relationship, determine a distance between the optimal data acquisition position and the installation position of the non-contact current and voltage acquisition device, and when the distance is not within a preset distance interval, mark the optimal data acquisition position on the installation image; The display module is used to display the installation image with the optimal data collection position marked.

2. The device according to claim 1, characterized in that The optimal data acquisition position is the position of the conductor center line of the device under test.

3. The device according to claim 2, characterized in that The controller is specifically configured to respond to location information input by a user and obtain a target image of the device under test associated with the location information.

4. The device according to claim 3, characterized in that The image acquisition module is used to acquire the original image of the device under test and transmit the original image to the controller; The controller is used to mark the position of the conductor center line of the device under test in the original image to obtain a target image of the device under test, and obtain location information of the device under test, associate the location information of the device under test with the target image, and store the associated location information of the device under test and the target image in a storage module.

5. The device according to claim 1, characterized in that The handheld terminal also includes a signal processing module, which is connected to the non-contact current and voltage acquisition device and the controller respectively, and is used to perform signal processing on the voltage data and current data collected by the non-contact current and voltage acquisition device, and transmit the processed voltage data and current data to the controller.

6. The device according to claim 1, characterized in that The handheld terminal also includes a temperature acquisition module; The temperature acquisition module is connected to the controller and is used to acquire the ambient temperature of the device to be tested and transmit the ambient temperature to the controller; The controller is used to determine whether the ambient temperature is within a preset temperature threshold range. If so, output a start acquisition signal to the non-contact current and voltage acquisition device to enable the non-contact current and voltage acquisition device to perform an acquisition action. Otherwise, based on the comparison result between the ambient temperature and the preset temperature threshold range, a corresponding target temperature drift compensation model is determined, and the current data and voltage data collected by the non-contact current and voltage acquisition device are input into the target temperature drift compensation model to obtain compensated current data and voltage data.

7. The device according to claim 6, characterized in that The controller is specifically used to obtain a pre-trained first temperature drift compensation model as a target temperature drift compensation model when the temperature environment is less than a minimum value of the temperature threshold range.

8. The device according to claim 6, characterized in that The controller is specifically used to obtain a pre-trained second temperature drift compensation model as a target temperature drift compensation model when the temperature environment is less than a maximum value of the temperature threshold range.

9. The device according to claim 1, characterized in that The handheld terminal also includes a communication module; The controller is connected to the communication module and is connected to the server through the communication module, and is used to upload the data in the storage module to the server.

10. A distribution box data collection method, characterized in that: Applied to the device according to any one of claims 1 to 9, the method comprises: When the non-contact current and voltage acquisition device is installed on the device to be tested in the distribution box, the image acquisition device acquires an installation image including the installation position of the non-contact current and voltage acquisition device; The controller obtains the installation image and a pre-stored target image of the device to be tested, wherein the target image is marked with an optimal data acquisition position; and adopts a feature point matching algorithm to determine a transformation relationship between the target image and the installation image, and determines the distance between the optimal data acquisition position and the installation position of the non-contact current and voltage acquisition device according to the transformation relationship, and when the distance is not within a preset distance interval, marks the optimal data acquisition position on the installation image; The display module shows an installation image with the optimal data collection position marked.

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