A safety control device and method for special vehicle near electric field operation

Abstract

The present invention discloses a safety control device and method for near-electric field operation of special vehicles, which relates to the technical field of near-electric safety monitoring of vehicles. The key points of its technical solution are: an electric field sensing sensor, which is used to continuously collect multiple electric field strength data of the target electric field area within a preset period; an electric field sensing calculation module, which is used to convert multiple electric field strength data into real-time electric field strength digital quantities by average electric field calculation, and obtain the standard electric field value after calibrating the real-time electric field strength digital quantity according to the test calibration function; a safety control alarm module, which is used to obtain the electric field reference value according to the working voltage level of the target electric field area and the safe distance of safe work in real time, and alarm when the standard electric field value exceeds the electric field reference value. The present invention can quickly and accurately obtain the electric field value under complex electric fields and external interference, which not only improves the adaptability of safety control, but also improves the reliability of safety control.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle near-electrical safety monitoring, and more specifically, to a device and method for safety control of special vehicle near-electrical field operations. Background Art

[0002] The primary equipment in the substation is generally installed more than 2m above the ground. Special operation vehicles such as cranes and boom trucks are often used for equipment maintenance. In recent years, special operation vehicles have accidentally hit running equipment in the maintenance area, causing equipment power outages and serious accidents. Since the live equipment can discharge to the metal parts of the vehicle within a certain distance, the generated current and arc are extremely destructive, which can trigger tripping of the power grid at the least, and cause fatal burns to the human body and large-scale power grid accidents in severe cases. At present, substations are basically equipped with integrated automation systems, five-defense, video surveillance, electronic fences and other systems, which play an important role in monitoring, protection, control and safety prevention of substations, but these systems cannot effectively control the safety of high-altitude special vehicles and operators in the station.

[0003] At present, the existing technology has compared and analyzed the distance determined by electric field induction with the safe distance determined by the voltage level, and issued an alarm when the distance determined by electric field induction is less than the safe distance determined by the voltage level. However, due to the spatial interweaving of various voltage level equipment in the 500kV substation, the electric field distribution is complex and changeable, and there is a nonlinear relationship between the output signal size of the electric field induction sensor and the distance of the energized equipment, resulting in low measurement and warning accuracy; in addition, the output signal of the current single-direction electric field sensor is easily disturbed by human body shaking, resulting in output signal fluctuations and measurement deviations; in addition, the existing integrated design of the sensing device and the alarm device results in the device being powered only by batteries, with a short battery life, and the sound and light alarm device is at a high place, and the operator's observation remains unchanged.

[0004] Therefore, how to research and design a special vehicle near-electric field operation safety control device and method that can overcome the above-mentioned defects is a problem that we urgently need to solve. Summary of the invention

[0005] In order to solve the deficiencies in the prior art, an object of the present invention is to provide a safety control device and method for near-electric field operations of special vehicles.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] In a first aspect, a safety control device for near-electric field operations of special vehicles is provided, including an electric field sensing sensor, an electric field sensing calculation module, and a safety control alarm module;

[0008] An electric field sensing sensor is used to continuously collect multiple electric field strength data of a target electric field area within a preset period, each electric field strength data includes at least three electric field strength values ​​in different directions;

[0009] The electric field sensing calculation module is used to convert multiple electric field strength data into real-time electric field strength digital quantities through average electric field calculation, and obtain a standard electric field value after calibrating the real-time electric field strength digital quantities according to a test calibration function;

[0010] The safety control alarm module is used to obtain the electric field reference value in real time according to the working voltage level of the target electric field area and the safe distance for safe working, and to issue an alarm when the standard electric field value exceeds the electric field reference value.

[0011] Furthermore, the electric field sensing sensor includes a main body, an X-axis sensing probe, a Y-axis sensing probe and a Z-axis sensing probe, and the X-axis sensing probe, the Y-axis sensing probe and the Z-axis sensing probe are correspondingly distributed in the X-axis, Y-axis and Z-axis directions with the center of the main body as the origin; the main body is an aluminum hollow sphere, and the X-axis sensing probe, the Y-axis sensing probe and the Z-axis sensing probe are all wrapped with PVC plastic material.

[0012] Furthermore, the electric field sensing calculation module includes a power supply module and a signal amplifier, a bandpass filter, an AD analog-to-digital conversion unit, and a DSP data processing unit which are electrically connected in sequence;

[0013] A signal amplifier, used for amplifying the output signal of the electric field induction sensor to obtain an amplified signal;

[0014] A bandpass filter is used to obtain a filtered signal after filtering the amplified signal;

[0015] AD analog-to-digital conversion unit, used to convert the filtered signal in analog quantity into a digital quantity signal;

[0016] The DSP data processing unit is used to convert multiple electric field strength data in the form of digital signals into real-time electric field strength digital quantities through average electric field calculation, and obtain standard electric field values ​​after calibrating the real-time electric field strength digital quantities according to the test calibration function.

[0017] Furthermore, the safety control alarm module includes a data processing unit, an audible and visual alarm module and a power supply module;

[0018] The data processing unit obtains the electric field reference value in real time according to the working voltage level of the target electric field area and the safe working distance, and determines whether the standard electric field value exceeds the electric field reference value; if it exceeds, an alarm signal is output;

[0019] The sound and light alarm module is used to execute corresponding alarm actions after responding to the alarm signal.

[0020] Furthermore, the safety control alarm module is also provided with a GPS positioning module and a 4G wireless communication module installed in the special vehicle, and the safety control alarm module is connected to the safety control early warning system through the 4G wireless communication module;

[0021] The safety control and early warning system is used to set early warning parameter information and transmit the early warning parameter information to the data processing unit; the early warning parameter information includes the vehicle route, on-site operation scope and on-site operation voltage level;

[0022] GPS positioning module, used to obtain the positioning information of special vehicles in real time and transmit the positioning information to the data processing unit;

[0023] The data processing unit is used to determine whether the positioning information is within the coverage of the warning parameter information; if not, an early warning signal is output.

[0024] Furthermore, the electric field sensing calculation module and the safety control alarm module are both configured with 433M wireless transceiver modules, and the two 433M wireless transceiver modules use MODBUS communication protocol for information transmission.

[0025] In a second aspect, a method for safety control of near-electric field operations of special vehicles is provided, comprising the following steps:

[0026] Continuously collecting multiple electric field strength data of the target electric field area within a preset period, each electric field strength data includes at least three electric field strength values ​​in different directions;

[0027] The multiple electric field strength data are converted into real-time electric field strength digital quantities by average electric field calculation, and the real-time electric field strength digital quantities are calibrated according to the test calibration function to obtain the standard electric field value;

[0028] The electric field reference value is obtained by real-time analysis based on the working voltage level of the target electric field area and the safe working distance, and an alarm is issued when the standard electric field value exceeds the electric field reference value.

[0029] Furthermore, the process of converting the electric field strength data into a real-time electric field strength digital quantity is specifically as follows:

[0030] averaging multiple electric field strength values ​​in the same electric field strength data to obtain multiple average values ​​corresponding to the continuous acquisition time;

[0031] Then, multiple values ​​in the top columns of the average value difference ranking are filtered to obtain the electric field intensity sequence;

[0032] The weighted average calculation is performed on each average value in the electric field strength sequence according to the obtained weight coefficient to obtain a real-time electric field strength digital value.

[0033] Furthermore, the process of obtaining the weight coefficient is specifically as follows:

[0034] The preset weight coefficient is obtained according to the working voltage level matching of the target electric field area;

[0035] Alternatively, the average values ​​in the electric field strength sequence are arranged in descending or ascending order, and the average value in the middle after the arrangement is selected as the reference point, and the corresponding weight coefficient is dynamically generated according to the difference distribution of the average values ​​on both sides of the reference point.

[0036] Furthermore, the process of obtaining the test calibration function is specifically as follows:

[0037] Collect the test electric field value of the target electric field area by using a standard electric field tester;

[0038] A linear regression analysis is performed between a plurality of continuously obtained real-time electric field strength digital quantities and the test electric field value to obtain a test calibration function.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. The present invention collects the electric field strength values ​​in multiple directions in the target electric field area at the same time, and obtains multiple data groups through continuous collection. The electric field strength values ​​are converted and calibrated without considering the direction of the electric field strength, so that the electric field values ​​under complex electric fields and external interference can be obtained quickly and accurately, which not only improves the adaptability of safety control, but also improves the reliability of safety control;

[0041] 2. The present invention predicts, analyzes and warns the operation of special vehicles by setting warning parameter information, making it convenient for operators to prepare emergency measures in advance;

[0042] 3. The present invention also dynamically generates corresponding weight coefficients according to the differential distribution of each average value in the electric field intensity sequence, effectively reducing the influence of data with large errors on the weighted average calculation result;

[0043] 4. The present invention collects test electric field values ​​and real-time electric field strength digital quantities based on a standard electric field tester for linear regression analysis, and can dynamically generate a test calibration function that conforms to the target electric field area, thereby making the calibration result of the real-time electric field strength digital quantity more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0045] Figure 1 is a diagram of the overall working principle in an embodiment of the present invention;

[0046] Figure 2 is a schematic diagram of the structure of an electric field sensing sensor in an embodiment of the present invention;

[0047] Figure 3 is a working principle diagram of a bandpass filter in an embodiment of the present invention;

[0048] Figure 4 It is a workflow diagram in an embodiment of the present invention.

[0049] Marks and corresponding parts names in the attached drawings:

[0050] 1. Main body; 2. X-axis sensor probe; 3. Y-axis sensor probe; 4. Z-axis sensor probe. DETAILED DESCRIPTION

[0051] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0052] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to the other component.

[0053] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0055] Embodiment 1: A safety control device for special vehicles operating in near electric fields, such as Figure 1As shown, it includes an electric field sensing sensor, an electric field sensing calculation module and a safety control alarm module; the electric field sensing sensor is used to continuously collect multiple electric field strength data of the target electric field area within a preset period, and each electric field strength data includes at least three electric field strength values ​​in different directions; the electric field sensing calculation module is used to convert the multiple electric field strength data into real-time electric field strength digital quantities by average electric field calculation, and obtain the standard electric field value after calibrating the real-time electric field strength digital quantities according to the test calibration function; the safety control alarm module is used to obtain the electric field reference value according to the working voltage level of the target electric field area and the safe distance for safe work in real time analysis, and alarm when the standard electric field value exceeds the electric field reference value.

[0056] The present invention adopts three-dimensional electric field sensing and separates the collection and alarm devices to effectively solve the safety warning problem of special operation vehicles in complex electric fields. It has the advantages of high measurement accuracy, long battery life and integrated intelligent management and control.

[0057] like Figure 2 As shown, the electric field sensing sensor includes a main body 1, an X-axis sensing probe 2, a Y-axis sensing probe 3 and a Z-axis sensing probe 4. The X-axis sensing probe 2, the Y-axis sensing probe 3 and the Z-axis sensing probe 4 are correspondingly distributed in the X-axis, Y-axis and Z-axis directions with the center of the main body 1 as the origin; the main body 1 is an aluminum hollow sphere, and the X-axis sensing probe 2, the Y-axis sensing probe 3 and the Z-axis sensing probe 4 are all wrapped with PVC plastic material. It should be noted that the distribution angle between the X-axis sensing probe 2, the Y-axis sensing probe 3 and the Z-axis sensing probe 4 can also be set to multiple angles such as 60 degrees and 120 degrees, which can be flexibly adjusted according to actual conditions.

[0058] The electric field induction calculation module includes a power supply module and a signal amplifier, a bandpass filter, an AD analog-to-digital conversion unit, and a DSP data processing unit which are electrically connected in sequence.

[0059] The power supply voltage of the electric field sensing sensor of the electrostatic field is 5V, and a 50 Hz sinusoidal voltage is inductively coupled through the capacitor charging and discharging effect. Since the output voltage value is small, at the millivolt level, for the convenience of subsequent signal processing, the output signal of the electric field sensing sensor needs to be amplified. The signal amplifier module uses the ADA4099 precision amplifier to amplify the millivolt voltage signal of the electric field sensing sensor to a 0-5V voltage signal.

[0060] like Figure 3 As shown, since the signal after amplification by the signal amplifier contains high-order harmonics, among which the effective signal is a 50 Hz industrial frequency signal, it is measured through experiments that when the bandpass frequency of the bandpass filter is set to 10-90 Hz, the signal is relatively stable, and the filter uses OPA1611.

[0061] The 50 Hz power frequency voltage signal after bandpass filter shaping needs to be converted into a digital signal through the AD analog-to-digital conversion unit, using a frequency of 1 MHz and a sampling accuracy of 12-bit digital signals. Since the electric field induction sensor outputs X, Y, and Z axis signals, the AD analog-to-digital conversion unit uses the AD7091R-4 multi-channel analog-to-digital converter to transmit the 12-bit voltage mathematical signal to the DSP in real time for signal analysis and processing.

[0062] DSP data processing unit. The received X, Y, and Z three-axis digital signals are filtered by software using the sliding average filter method. Since the signal frequency is 50 Hz, the sampling frequency is selected as 0.5 MHz, and the continuous sampling is performed 100 times. Finally, the X, Y, and Z data are weighted averaged to measure the real-time digital value of the electric field strength, and the data is calibrated by the standard electric field tester to obtain the standard electric field value.

[0063] The safety control alarm module includes a data processing unit, an audible and visual alarm module, and a power supply module. The data processing unit obtains the electric field reference value in real time according to the working voltage level of the target electric field area and the safe distance for safe work, and determines whether the standard electric field value exceeds the electric field reference value; if it exceeds, an alarm signal is output. The audible and visual alarm module is used to execute the corresponding alarm action after responding to the alarm signal.

[0064] In order to record, monitor, and control the operation behavior of special operation vehicles at the station in real time, the present invention also designs a safety control and early warning system. The system collects the status of on-site operation vehicles in real time, including location information and electric field information, through 4G public network communication. Before the operation, the vehicle route, on-site operation scope, and on-site operation voltage level information are set through the safety control and early warning system, and downloaded to the safety control alarm device. When the vehicle has unsafe behavior, the alarm is promptly sounded to stop it. In addition, when the station-side equipment is abnormal, the alarm information can also be sent remotely to remind the operator.

[0065] Both the electric field sensing calculation module and the safety control alarm module are equipped with 433M wireless transceiver modules. The two 433M wireless transceiver modules use the MODBUS communication protocol for information transmission.

[0066] In addition, the electric field collection and calculation devices all use low-power components, are powered by lithium batteries, and are installed at the highest point of the special vehicle's bucket arm. They have the advantages of small size, light weight, and easy disassembly.

[0067] Example 2: A method for safety control of special vehicle near electric field operation, such as Figure 4 As shown, the following steps are included:

[0068] S1: continuously collecting multiple electric field strength data of the target electric field area within a preset period, each electric field strength data includes at least three electric field strength values ​​in different directions;

[0069] S2: converting multiple electric field strength data into real-time electric field strength digital quantities through average electric field calculation, and calibrating the real-time electric field strength digital quantities according to the test calibration function to obtain a standard electric field value;

[0070] S3: The electric field reference value is obtained by real-time analysis based on the working voltage level of the target electric field area and the safe working distance, and an alarm is issued when the standard electric field value exceeds the electric field reference value.

[0071] The process of converting electric field strength data into real-time electric field strength digital quantity is specifically as follows: averaging multiple electric field strength values ​​in the same electric field strength data to obtain multiple average values ​​corresponding to the continuous acquisition time; filtering multiple values ​​in the top column with the highest average value difference to obtain an electric field strength sequence; and performing weighted average calculation on each average value in the electric field strength sequence according to the obtained weight coefficient to obtain the real-time electric field strength digital quantity.

[0072] The weight coefficient can be obtained by matching the working voltage level of the target electric field area. In addition, the average values ​​in the electric field strength sequence can be arranged in descending or ascending order, and the average value in the middle after sorting can be selected as the reference point, and the corresponding weight coefficient can be dynamically generated according to the difference distribution of the average values ​​on both sides of the reference point. In addition, the system preset value can also be adopted.

[0073] The specific process of obtaining the test calibration function is: collecting the test electric field value of the target electric field area through a standard electric field tester; performing linear regression analysis on multiple continuously obtained real-time electric field strength digital quantities and the test electric field value to obtain the test calibration function.

[0074] Working principle: The present invention collects electric field strength values ​​in multiple directions within the target electric field area at the same time, and obtains multiple data groups after continuous collection. Without considering the direction of the electric field strength, the electric field strength values ​​are converted and calibrated, which can quickly and accurately obtain the electric field values ​​under complex electric fields and external interference, thereby improving the adaptability of safety management and control and the reliability of safety management and control.

[0075] The above specific implementation methods further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A safety control device for special vehicles operating in near electric fields, characterized in that: It includes an electric field sensing sensor, an electric field sensing calculation module and a safety control alarm module; An electric field sensing sensor is used to continuously collect multiple electric field strength data of a target electric field area within a preset period, each electric field strength data includes at least three electric field strength values ​​in different directions; The electric field sensing calculation module is used to convert multiple electric field strength data into real-time electric field strength digital quantities through average electric field calculation, and obtain a standard electric field value after calibrating the real-time electric field strength digital quantities according to a test calibration function; The safety control alarm module is used to obtain the electric field reference value in real time according to the working voltage level of the target electric field area and the safe distance for safe work, and to alarm when the standard electric field value exceeds the electric field reference value; The process of converting the electric field strength data into a real-time electric field strength digital quantity is specifically as follows: averaging multiple electric field strength values ​​in the same electric field strength data to obtain multiple average values ​​corresponding to the continuous acquisition time; Then, multiple values ​​in the top columns of the average value difference ranking are filtered to obtain the electric field intensity sequence; The weighted average calculation is performed on each average value in the electric field strength sequence according to the obtained weight coefficient to obtain a real-time electric field strength digital value; The process of obtaining the test calibration function is specifically as follows: Collect the test electric field value of the target electric field area by using a standard electric field tester; A linear regression analysis is performed between a plurality of continuously obtained real-time electric field strength digital quantities and the test electric field value to obtain a test calibration function.

2. A safety control device for near-electric field operation of special vehicles according to claim 1, characterized in that: The electric field sensing sensor comprises a main body (1), an X-axis sensing probe (2), a Y-axis sensing probe (3) and a Z-axis sensing probe (4); the X-axis sensing probe (2), the Y-axis sensing probe (3) and the Z-axis sensing probe (4) are correspondingly distributed in the X-axis, Y-axis and Z-axis directions with the center of the main body (1) as the origin; the main body (1) is a hollow sphere made of aluminum, and the X-axis sensing probe (2), the Y-axis sensing probe (3) and the Z-axis sensing probe (4) are all wrapped with PVC plastic material.

3. A safety control device for near-electric field operation of special vehicles according to claim 1, characterized in that: The electric field induction calculation module includes a power supply module and a signal amplifier, a bandpass filter, an AD analog-to-digital conversion unit, and a DSP data processing unit which are electrically connected in sequence; A signal amplifier, used for amplifying the output signal of the electric field induction sensor to obtain an amplified signal; A bandpass filter is used to obtain a filtered signal after filtering the amplified signal; AD analog-to-digital conversion unit, used to convert the filtered signal in analog quantity into a digital quantity signal; The DSP data processing unit is used to convert multiple electric field strength data in the form of digital signals into real-time electric field strength digital quantities through average electric field calculation, and obtain standard electric field values ​​after calibrating the real-time electric field strength digital quantities according to the test calibration function.

4. A safety control device for near-electric field operation of special vehicles according to claim 1, characterized in that: The safety management and control alarm module includes a data processing unit, an audible and visual alarm module and a power supply module; The data processing unit obtains the electric field reference value in real time according to the working voltage level of the target electric field area and the safe distance for safe working, and determines whether the standard electric field value exceeds the electric field reference value; If exceeded, an alarm signal is output; The sound and light alarm module is used to execute corresponding alarm actions after responding to the alarm signal.

5. A safety control device for near-electric field operation of special vehicles according to claim 4, characterized in that: The safety control alarm module is also provided with a GPS positioning module and a 4G wireless communication module installed in the special vehicle, and the safety control alarm module is connected to the safety control early warning system through the 4G wireless communication module; A safety control and early warning system is used to set early warning parameter information and transmit the early warning parameter information to the data processing unit; Warning parameter information includes vehicle travel route, on-site operation scope and on-site operation voltage level; GPS positioning module, used to obtain the positioning information of special vehicles in real time and transmit the positioning information to the data processing unit; A data processing unit, used to determine whether the positioning information is within the coverage of the warning parameter information; If not, a warning signal is output.

6. A safety control device for near-electric field operation of special vehicles according to claim 1, characterized in that: The electric field sensing calculation module and the safety control alarm module are both configured with 433M wireless transceiver modules, and the two 433M wireless transceiver modules use the MODBUS communication protocol for information transmission.

7. A method for safety control of special vehicle near electric field operation, characterized in that: The following steps are involved: Continuously collecting multiple electric field strength data of the target electric field area within a preset period, each electric field strength data includes at least three electric field strength values ​​in different directions; The multiple electric field strength data are converted into real-time electric field strength digital quantities by average electric field calculation, and the real-time electric field strength digital quantities are calibrated according to the test calibration function to obtain the standard electric field value; The electric field reference value is obtained by real-time analysis based on the working voltage level of the target electric field area and the safe working distance, and an alarm is issued when the standard electric field value exceeds the electric field reference value; The process of converting the electric field strength data into a real-time electric field strength digital quantity is specifically as follows: averaging multiple electric field strength values ​​in the same electric field strength data to obtain multiple average values ​​corresponding to the continuous acquisition time; Then, multiple values ​​in the top columns of the average value difference ranking are filtered to obtain the electric field intensity sequence; The weighted average calculation is performed on each average value in the electric field strength sequence according to the obtained weight coefficient to obtain a real-time electric field strength digital value; The process of obtaining the test calibration function is specifically as follows: Collect the test electric field value of the target electric field area by using a standard electric field tester; A linear regression analysis is performed between a plurality of continuously obtained real-time electric field strength digital quantities and the test electric field value to obtain a test calibration function.

8. A method for safety control of near-electric field operation of special vehicles according to claim 7, characterized in that: The process of obtaining the weight coefficient is specifically as follows: The preset weight coefficient is obtained according to the working voltage level matching of the target electric field area; Alternatively, the average values ​​in the electric field strength sequence are arranged in descending or ascending order, and the average value in the middle after sorting is selected as the reference point, and the corresponding weight coefficient is dynamically generated according to the difference distribution of the average values ​​on both sides of the reference point.

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