Wrist type anti-electric shock early warning system and method for maintenance

Abstract

The invention belongs to the technical field of electric power safety, and discloses a wrist type anti-electric shock early warning system and method for maintenance, and the system is adjusted to an operation state by a switch automatic control module; the electric field detection and analysis module obtains an original power frequency electric field signal and processes the original power frequency electric field signal to obtain a target power frequency electric field signal after the wrist type anti-electric shock early warning system for maintenance is in a running state; the single-chip microcomputer determines the voltage grade of the electrified object according to the target power frequency electric field signal, determines a safety distance according to the voltage grade, and sets an early warning distance; the intelligent distance tracking module obtains the current distance between the worker and the electrified object; the single chip microcomputer generates an early warning signal when it is determined that early warning needs to be carried out based on the early warning distance and the current distance; the wrist type anti-electric shock early warning system for maintenance is convenient to carry, and meanwhile, real-time early warning can be carried out according to the distance between the worker and the electrified object.

Description

Technical Field

[0001] The present invention relates to the field of power safety technology, and in particular to a wrist-type electric shock prevention warning system and method for maintenance. Background Art

[0002] The ever-growing power transmission network requires the construction, monitoring, and maintenance of many power workers to ensure healthy and sustainable development and safe and stable operation. Since high voltage electricity itself has the unique property of being invisible, intangible, and even unapproachable, power maintenance personnel often deal with various power equipment and may touch or approach live parts under unknown circumstances, thereby endangering life safety. During the maintenance process, maintenance personnel often cause electric shock accidents due to misoperation, being too close to live parts, or improper use of construction equipment.

[0003] Most of the current electrical testing equipment can only be installed on-site or is bulky and inconvenient to carry. It has poor adaptability to multiple voltage levels on site, or can only provide electrical testing and early warning for live objects. There is no real-time tracking of the safety relationship between the operator and the live object, and it is impossible to effectively provide real-time early warning.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present invention is to provide a wrist-type anti-electric shock warning system and method for maintenance, aiming to solve the technical problems that most of the current electrical testing equipment can only be installed on-site or are bulky and inconvenient to carry, have poor adaptability to multiple voltage levels on site, have no real-time tracking of the safety relationship between operators and live objects, and cannot effectively provide real-time warnings.

[0006] To achieve the above-mentioned purpose, the present invention provides a maintenance wrist-type electric shock prevention warning system, which includes: an electric field detection and analysis module, an intelligent distance tracking module, an AD conversion module, a single-chip microcomputer, an audible and visual alarm control module, a switch automatic control module and a power supply control module, wherein the power supply control module is used to supply power to the electric field detection and analysis module, the intelligent distance tracking module, the AD conversion module, the single-chip microcomputer, the audible and visual alarm control module and the switch automatic control module;

[0007] The switch automatic control module is used to adjust the maintenance wrist-type electric shock prevention warning system to the operating state in response to the use request of the staff;

[0008] The electric field detection and analysis module is used to obtain the original power frequency electric field signal after the maintenance wrist-type electric shock prevention warning system is in operation, and process the original collected power frequency electric field signal to obtain the target power frequency electric field signal, and forward the target power frequency electric field signal to the single chip microcomputer through the AD conversion module;

[0009] The single chip microcomputer is used to determine the voltage level corresponding to the charged object according to the received target power frequency electric field signal, determine the safety distance according to the voltage level, and set the first warning distance and the second warning distance according to the safety distance;

[0010] The intelligent distance tracking module is used to obtain the current distance between the worker and the charged object, and send the current distance to the single chip microcomputer;

[0011] The single chip microcomputer is used to make a warning judgment based on the first warning distance, the second warning distance and the current distance, generate a warning signal if a warning is required, and send the warning signal to the sound and light alarm control module;

[0012] The sound and light alarm control module is used to give early warning prompts to staff according to the received early warning signal.

[0013] In some embodiments, the electric field detection and analysis module includes several electric field sensors, and the electric field detection and analysis module is used to obtain the sub-industrial frequency electric field signal obtained by each electric field sensor, fuse the several sub-industrial frequency electric field signals to obtain the original industrial frequency electric field signal, and denoise the original industrial frequency electric field signal to obtain the target industrial frequency electric field signal.

[0014] In some embodiments, the electric field detection and analysis module is used to obtain the sub-industrial frequency electric field signal corresponding to any electric field sensor based on several sub-industrial frequency electric field signals, determine the observation value and measurement value corresponding to the arbitrary electric field sensor based on the sub-industrial frequency electric field signal, and determine the observation value standard deviation and measurement value standard deviation corresponding to all sensors based on the dry sub-industrial frequency electric field signal, and fuse the several sub-industrial frequency electric field signals based on the observation value, the measurement value, the observation value standard deviation and the measurement value standard deviation.

[0015] In some embodiments, the electric field detection and analysis module is used to transform the original power frequency electric field signal using wavelet transform to obtain a reference power frequency electric field signal, determine a coefficient compression method, determine a corresponding threshold function based on the coefficient compression method, compress the wavelet coefficients based on the threshold function, and use the compressed wavelet coefficients to denoise the reference power frequency electric field signal to obtain a target power frequency electric field signal.

[0016] In some embodiments, the single chip microcomputer is used to construct a line density matrix of the wire corresponding to the charged object according to the received target industrial frequency electric field signal, and to construct a matrix equation of equivalent charge, to determine the equivalent charge per unit length based on the charge density matrix of the wire, the matrix equation of equivalent charge and the potential coefficient matrix of the wire, to determine the electric field strength at the position of the worker in the space based on the equivalent charge per unit length, and to determine the voltage level corresponding to the charged object according to the electric field strength.

[0017] In some embodiments, the first warning distance is greater than the second warning distance, and the single chip microcomputer is used to compare the current distance with the first warning distance and the second warning distance. If the current safety distance is less than the first warning distance, it is determined that a warning is needed. If the current safety distance is less than the first warning distance and greater than the second warning distance, the current warning level is determined to be the first warning level, and a warning signal is generated based on the first warning level. If the current safety distance is less than or equal to the second warning distance, the current warning level is determined to be the second warning level, and a warning signal is generated based on the second warning level.

[0018] In some embodiments, the sound and light alarm control module includes a vibration warning module and a buzzer, and the sound and light alarm control module is used to determine the warning level according to the warning signal. If the warning level is the first warning level, the buzzer is triggered to buzz the staff; if the warning level is the second warning level, the buzzer is triggered to buzz the staff and the vibration warning module is triggered to vibrate the staff.

[0019] In addition, to achieve the above-mentioned purpose, the present invention also proposes a maintenance wrist-type electric shock prevention warning method, which is applied to the maintenance wrist-type electric shock prevention warning system as described above, and the maintenance wrist-type electric shock prevention warning method includes:

[0020] The switch automatic control module adjusts the maintenance wrist-type electric shock prevention warning system to the operating state in response to the staff's use request;

[0021] The electric field detection and analysis module obtains the original power frequency electric field signal after the maintenance wrist-type electric shock prevention warning system is in operation, processes the original collected power frequency electric field signal to obtain the target power frequency electric field signal, and forwards the target power frequency electric field signal to the single chip microcomputer through the AD conversion module;

[0022] The single chip computer determines the voltage level corresponding to the charged object according to the received target power frequency electric field signal, determines the safety distance according to the voltage level, and sets the first warning distance and the second warning distance according to the safety distance;

[0023] The intelligent distance tracking module obtains the current distance between the worker and the charged object, and sends the current distance to the single chip microcomputer;

[0024] The single chip computer makes a warning judgment based on the first warning distance, the second warning distance and the current distance, generates a warning signal if a warning is required, and sends the warning signal to the sound and light alarm control module;

[0025] The sound and light alarm control module provides an early warning prompt to the staff according to the received early warning signal.

[0026] In some embodiments, the electric field detection and analysis module includes a plurality of electric field sensors, and the processing of the original collected power frequency electric field signal to obtain the target power frequency electric field signal includes:

[0027] The electric field detection and analysis module obtains the sub-power frequency electric field signals obtained by each electric field sensor, fuses several sub-power frequency electric field signals to obtain the original power frequency electric field signal, and performs denoising on the original power frequency electric field signal to obtain the target power frequency electric field signal.

[0028] In some embodiments, the fusing of the plurality of sub-industrial frequency electric field signals comprises:

[0029] The electric field detection and analysis module obtains the sub-industrial frequency electric field signal corresponding to any electric field sensor based on several sub-industrial frequency electric field signals, determines the observation value and measurement value corresponding to the any electric field sensor based on the sub-industrial frequency electric field signal, and determines the observation value standard deviation and measurement value standard deviation corresponding to all sensors based on the dry sub-industrial frequency electric field signal, and fuses the several sub-industrial frequency electric field signals based on the observation value, the measurement value, the observation value standard deviation and the measurement value standard deviation.

[0030] In the present invention, the switch automatic control module adjusts the maintenance wrist-type anti-electric shock warning system to the operating state in response to the use request of the staff; after the maintenance wrist-type anti-electric shock warning system is in the operating state, the electric field detection and analysis module obtains the original power frequency electric field signal, and processes the original collected power frequency electric field signal to obtain the target power frequency electric field signal, and forwards the target power frequency electric field signal to the single-chip microcomputer through the AD conversion module; the single-chip microcomputer determines the voltage level corresponding to the charged object according to the received target power frequency electric field signal, determines the safety distance according to the voltage level, and sets the first warning distance and the second warning distance according to the safety distance; the intelligent distance tracking module obtains the current distance between the staff and the charged object, and sends the current distance to the single-chip microcomputer; the single-chip microcomputer makes a warning judgment based on the first warning distance, the second warning distance and the current distance, generates a warning signal if a warning is required, and sends the warning signal to the sound and light alarm control module; the sound and light alarm control module warns the staff according to the received warning signal, the maintenance wrist-type anti-electric shock warning system is easy to carry, and can also provide real-time warning according to the distance between the staff and the charged object, which can improve the timeliness of the warning. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural block diagram of the first embodiment of the wrist-type electric shock prevention warning system for maintenance of the present invention;

[0032] Figure 2 This is a schematic diagram of the electric field sensor in the wrist-type electric shock prevention warning system for maintenance of the present invention;

[0033] Figure 3 This is a working diagram of the electric field sensor in the wrist-type electric shock prevention warning system for maintenance of the present invention;

[0034] Figure 4 It is a flowchart of the first embodiment of the wrist-type electric shock prevention warning method for maintenance of the present invention.

[0035] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0037] The embodiment of the present invention provides a maintenance wrist-type electric shock prevention warning system, referring to Figure 1 , Figure 1 This is a structural block diagram of a first embodiment of a wrist-type electric shock prevention warning system for maintenance according to the present invention.

[0038] It should be noted that most of the current electrical testing equipment can only be installed on-site or is bulky and inconvenient to carry, has poor adaptability to multiple voltage levels on site, or can only provide electrical testing and early warning for charged objects. There is no real-time tracking of the safety relationship between the operator and the charged object, and it is impossible to effectively provide real-time early warning. In order to solve the above technical problems, a wrist-type anti-electric shock early warning system for maintenance is proposed in this embodiment. The wrist-type anti-electric shock early warning system for maintenance is concentrated in a wrist-type wearable electrical testing device, which can be worn by workers when working, thereby improving the portability of the electrical testing device. The device includes an electric field detection and analysis module 10, an intelligent distance tracking module 20, an AD conversion module 30, a single-chip microcomputer 40, an sound and light alarm control module 50, a switch automatic control module 60 and a power supply control module 70, wherein the power supply control module 70 is used to power the entire wrist-type anti-electric shock early warning system for maintenance, that is, to power the electric field detection and analysis module 10, the intelligent distance tracking module 20, the AD conversion module 30, the single-chip microcomputer 40, the sound and light alarm control module 50, and the switch automatic control module 60.

[0039] The switch automatic control module 60 is used to control the opening and closing status of the entire maintenance wrist-type anti-electric shock warning system. When the staff is not wearing the wrist-type wearable electric test device, the entire maintenance wrist-type anti-electric shock warning system is in the closed state to save electricity. When the staff wears the wrist-type wearable electric test device, the entire maintenance wrist-type anti-electric shock warning system is in the running state. Even if the staff has not started working yet, as long as they wear the wrist-type wearable electric test device, the entire maintenance wrist-type anti-electric shock warning system will immediately be in the running state to prevent subsequent electric shock accidents caused by the failure to turn on the electric test device in time.

[0040] After the maintenance wrist-type electric shock prevention warning system is in operation, the electric field detection and analysis module 10 collects the original power frequency electric field signal and processes the original power frequency electric field signal to obtain the target power frequency electric field signal. It should be noted that the electric field detection and analysis module 10 in this embodiment includes a plurality of electric field sensors. The above process specifically obtains the sub-power frequency electric field signal obtained by each electric field sensor, and then fuses these sub-power frequency electric field signals to obtain the original power frequency electric field signal. The fusion process specifically obtains the sub-power frequency electric field signal corresponding to any electric field sensor according to the plurality of sub-power frequency electric field signals. Field signal, determine the observation value and measurement value corresponding to the arbitrary electric field sensor according to the sub-industrial frequency electric field signal, and determine the observation value standard deviation and measurement value standard deviation corresponding to all sensors according to the dry sub-industrial frequency electric field signal, and fuse the several sub-industrial frequency electric field signals based on the observation value, the measurement value, the observation value standard deviation and the measurement value standard deviation. The observation value is the data obtained by the sensor when monitoring without precise quantification or calibration, and the measurement value sensor is the data obtained by monitoring when precise quantification or calibration is performed. The fusion formula is as follows:

[0041]

[0042] Among them, T k and Q k are the observed value and measured value of the kth electric field sensor respectively, T0 and Q0 are the standard deviation of the observed value and measured value corresponding to all sensors respectively.

[0043] Further, after obtaining the original power frequency electric field signal, the specific process of denoising the original power frequency electric field signal is to transform the original power frequency electric field signal using wavelet transform. Assuming that the original power frequency electric field signal is f, and the reference power frequency electric field signal after wavelet transform is f1, then determine the coefficient compression method. The coefficient compression method in this embodiment is divided into soft compression and hard compression, and the corresponding soft threshold function and hard threshold function are respectively:

[0044]

[0045] Among them, R j,k That is, wavelet coefficient, N is the signal length, t is the compression threshold. After obtaining the compressed wavelet coefficient, a wavelet transform is performed again on the basis of the compressed wavelet coefficient to obtain the target power frequency electric field signal.

[0046] The electric field detection and analysis module 10 then forwards the target power frequency electric field signal to the single chip microcomputer 40 through the AD conversion module 30. The AD conversion module 30 can convert the target power frequency electric field signal into a signal that is easier for the single chip microcomputer 40 to recognize, so that it meets the processing requirements of the single chip microcomputer 40.

[0047] In addition, the design principle of the electric field sensor in the electric field detection and analysis module 10 in this embodiment is that the needle-plate structure is a typical extremely non-uniform electric field structure. If this type of structure is used as the non-contact sensor of the device, one end of the plate is in contact with the wire. When the external voltage reaches the corona starting field strength, corona discharge will occur near the needle tip with extremely large curvature, and it will not directly lead to the breakdown of the needle-plate gap. On the contrary, the structure has a relatively stable breakdown voltage, and is generally much higher than the corona starting voltage. Therefore, the safe and stable operation of this type of structure can be guaranteed. In this way, within a certain range, the needle-plate structure can measure voltage, and if it is made into a non-contact voltage transformer, it can be used as a charged detection device to indicate whether the conductor is charged. Therefore, we can use this structure as the basic structure of a non-contact charged detection device. The specific structure can refer to Figure 2 The display principle of the above-mentioned needle-plate type sensor is to use the capacitance formed by the needle-plate structure, connect the plate electrode to the busbar of the circuit under test, and connect the needle electrode to the ground through a series resistor, such as Figure 2 If there is voltage in the circuit, the tiny capacitive current and possible corona current will produce a voltage drop on the series resistor. By taking out the signal, it can be determined whether the circuit is energized. This signal is extremely weak and needs to be protected, amplified, filtered, compared, etc. to finally output information about whether the line is energized to the host. Figure 3 shown.

[0048] After receiving the target power frequency electric field signal, the single chip microcomputer 40 can determine the voltage level corresponding to the charged object according to the target power frequency electric field signal. Specifically, the wire densities of each wire are τ1, τ2, ..., τ n , construct the line density matrix as τ, according to the target power frequency electric field signal obtained above, the voltage of each unit length wire to the ground can be obtained, which is constructed as the voltage matrix U of each unit length wire to the ground and the equivalent charge matrix Q on the unit length wire, and then combine the potential coefficient matrix λ of each unit length wire to construct the matrix equation of the equivalent charge, for example, U = λQ, the equation group is as follows:

[0049]

[0050] The potential coefficient matrix λ is composed of the self-potential coefficients λ ii (i=1,2,…,n) and mutual potential coefficient λ ij (i≠j) is an n×n square matrix. The above equations can be used to solve Q and obtain the equivalent charge per unit length. Finally, the electric field strength can be calculated based on the equivalent charge per unit length, for example:

[0051]

[0052] Among them, x i ,y iare the horizontal and vertical coordinates of the conductor; ε0 is the dielectric constant of air; d i and d i ' is the distance from the wire i and its mirror image to the calculation point P(x,y), and the distance from the wire i and its mirror image to the calculation point P(x,y). Based on the relationship between the electric field strength, voltage and distance, the voltage level can be obtained. In this embodiment, the corresponding safety distance can be determined according to the voltage level, as shown in the following table:

[0053]

[0054] The first warning distance and the second warning distance can be set according to the above safety distance. Assuming the safety distance is 6m, the first warning distance is 5m, and the second warning distance is 3m. The intelligent distance tracking module 20 can obtain the current distance between the staff and the charged object, and can make a warning judgment based on the current distance and the above first warning distance and second warning distance.

[0055] Specifically, if the current distance is less than the first warning distance, it is determined that a warning is needed. Further, the warning is divided into different warning levels. If the current safety distance is less than the first warning distance and greater than the second warning distance, the current warning level is determined to be the first warning level. If the current safety distance is less than or equal to the second warning distance, the current warning level is determined to be the second warning level. Finally, a warning signal is generated according to the determined warning level. The above warning distance setting is only an example. The specific distance setting can be adjusted according to the safety production needs, on the premise of ensuring that the first warning distance is greater than the second warning distance, and the number of warning distances may not be limited to the above two.

[0056] Furthermore, a vibration warning module and a buzzer are provided in the sound and light alarm control module 50. When the warning level is the first warning level, the warning prompt adopted in this embodiment is a buzzer prompt. When the warning level is the second warning level, it means that the staff is too close to the charged object and has a high risk of electric shock. In response to this situation, in this embodiment, not only a buzzer prompt is performed, but also the vibration of the vibration warning module is triggered. Since it is a portable device, the staff is given a vibration prompt in this way.

[0057] In this embodiment, the switch automatic control module adjusts the maintenance wrist-type anti-electric shock warning system to the operating state in response to the staff's use request; after the maintenance wrist-type anti-electric shock warning system is in the operating state, the electric field detection and analysis module obtains the original power frequency electric field signal, and processes the original collected power frequency electric field signal to obtain the target power frequency electric field signal, and forwards the target power frequency electric field signal to the single-chip microcomputer through the AD conversion module; the single-chip microcomputer determines the voltage level corresponding to the charged object according to the received target power frequency electric field signal, determines the safety distance according to the voltage level, and sets the first warning distance and the second warning distance according to the safety distance; the intelligent distance tracking module obtains the current distance between the staff and the charged object, and sends the current distance to the single-chip microcomputer; the single-chip microcomputer makes a warning judgment based on the first warning distance, the second warning distance and the current distance, generates a warning signal if a warning is required, and sends the warning signal to the sound and light alarm control module; the sound and light alarm control module warns the staff according to the received warning signal, and the maintenance wrist-type anti-electric shock warning system is easy to carry, and can also provide real-time warning according to the distance between the staff and the charged object, which can improve the timeliness of the warning.

[0058] Reference Figure 4 , Figure 4 This is a structural block diagram of the first embodiment of the wrist-type electric shock prevention warning method for maintenance of the present invention.

[0059] like Figure 4 As shown, the maintenance wrist-type electric shock prevention warning method proposed in the embodiment of the present invention includes the following steps:

[0060] Step S10: The switch automatic control module adjusts the maintenance wrist-type electric shock protection warning system to an operating state in response to a use request from a staff member.

[0061] Step S20: After the maintenance wrist-type electric shock protection warning system is in operation, the electric field detection and analysis module obtains the original power frequency electric field signal, processes the original collected power frequency electric field signal to obtain the target power frequency electric field signal, and forwards the target power frequency electric field signal to the single chip computer through the AD conversion module.

[0062] Step S30: the single chip microcomputer determines the voltage level corresponding to the charged object according to the received target power frequency electric field signal, determines the safety distance according to the voltage level, and sets the first warning distance and the second warning distance according to the safety distance.

[0063] Step S40: The intelligent distance tracking module obtains the current distance between the worker and the charged object, and sends the current distance to the single chip microcomputer.

[0064] Step S50: the single chip computer performs a warning judgment based on the first warning distance, the second warning distance and the current distance, generates a warning signal if a warning is required, and sends the warning signal to the sound and light alarm control module.

[0065] Step S60: the sound and light alarm control module issues an early warning prompt to the staff according to the received early warning signal.

[0066] In this embodiment, the switch automatic control module adjusts the maintenance wrist-type anti-electric shock warning system to the operating state in response to the staff's use request; after the maintenance wrist-type anti-electric shock warning system is in the operating state, the electric field detection and analysis module obtains the original power frequency electric field signal, and processes the original collected power frequency electric field signal to obtain the target power frequency electric field signal, and forwards the target power frequency electric field signal to the single-chip microcomputer through the AD conversion module; the single-chip microcomputer determines the voltage level corresponding to the charged object according to the received target power frequency electric field signal, determines the safety distance according to the voltage level, and sets the first warning distance and the second warning distance according to the safety distance; the intelligent distance tracking module obtains the current distance between the staff and the charged object, and sends the current distance to the single-chip microcomputer; the single-chip microcomputer makes a warning judgment based on the first warning distance, the second warning distance and the current distance, generates a warning signal if a warning is required, and sends the warning signal to the sound and light alarm control module; the sound and light alarm control module warns the staff according to the received warning signal, and the maintenance wrist-type anti-electric shock warning system is easy to carry, and can also provide real-time warning according to the distance between the staff and the charged object, which can improve the timeliness of the warning.

[0067] In some embodiments, the electric field detection and analysis module includes a plurality of electric field sensors, and the processing of the original collected power frequency electric field signal to obtain the target power frequency electric field signal includes:

[0068] The electric field detection and analysis module obtains the sub-power frequency electric field signals obtained by each electric field sensor, fuses several sub-power frequency electric field signals to obtain the original power frequency electric field signal, and performs denoising on the original power frequency electric field signal to obtain the target power frequency electric field signal.

[0069] In some embodiments, the fusing of the plurality of sub-industrial frequency electric field signals comprises:

[0070] The electric field detection and analysis module obtains the sub-industrial frequency electric field signal corresponding to any electric field sensor based on several sub-industrial frequency electric field signals, determines the observation value and measurement value corresponding to the any electric field sensor based on the sub-industrial frequency electric field signal, and determines the observation value standard deviation and measurement value standard deviation corresponding to all sensors based on the dry sub-industrial frequency electric field signal, and fuses the several sub-industrial frequency electric field signals based on the observation value, the measurement value, the observation value standard deviation and the measurement value standard deviation.

[0071] In some embodiments, the denoising process is performed on the original power frequency electric field signal to obtain the target power frequency electric field signal, including:

[0072] The electric field detection and analysis module transforms the original power frequency electric field signal using wavelet transform to obtain a reference power frequency electric field signal, determines a coefficient compression method, determines a corresponding threshold function based on the coefficient compression method, compresses the wavelet coefficients based on the threshold function, and uses the compressed wavelet coefficients to denoise the reference power frequency electric field signal to obtain a target power frequency electric field signal.

[0073] In some embodiments, the single chip microcomputer determines the voltage level corresponding to the charged object according to the received target power frequency electric field signal, including:

[0074] The single-chip microcomputer constructs a line density matrix of the wire corresponding to the charged object and a matrix equation of equivalent charge based on the received target industrial frequency electric field signal, determines the equivalent charge per unit length based on the charge density matrix of the wire, the matrix equation of equivalent charge and the potential coefficient matrix of the wire, determines the electric field strength at the position of the worker in the space based on the equivalent charge per unit length, and determines the voltage level corresponding to the charged object based on the electric field strength.

[0075] In some embodiments, the first warning distance is greater than the second warning distance, and a warning judgment is made based on the first warning distance, the second warning distance, and the current distance, and a warning signal is generated if a warning is required, including:

[0076] The single chip computer compares the current distance with the first warning distance and the second warning distance. If the current safety distance is less than the first warning distance, it is determined that a warning is needed. If the current safety distance is less than the first warning distance and greater than the second warning distance, the current warning level is determined to be the first warning level, and a warning signal is generated based on the first warning level. If the current safety distance is less than or equal to the second warning distance, the current warning level is determined to be the second warning level, and a warning signal is generated based on the second warning level.

[0077] In some embodiments, the sound and light alarm control module includes a vibration warning module and a buzzer, and the sound and light alarm control module provides a warning prompt to the staff according to the received warning signal, including:

[0078] The sound and light alarm control module determines the warning level according to the warning signal. If the warning level is the first warning level, the buzzer is triggered to give a buzzer reminder to the staff. If the warning level is the second warning level, the buzzer is triggered to give a buzzer reminder to the staff, and the vibration warning module is triggered to give a vibration reminder to the staff.

[0079] An embodiment of the present application also provides a wrist-type anti-electric shock warning device for maintenance, including a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus, and the memory is used to store the wrist-type anti-electric shock warning program for maintenance; the processor is used to implement the above-mentioned wrist-type anti-electric shock warning method for maintenance when executing the program stored in the memory.

[0080] The communication bus mentioned in the above maintenance wrist-type electric shock prevention warning device can be a peripheral component interconnect standard (English: Peripheral Component Interconnect, referred to as: PCI) bus or an extended industry standard architecture (English: Extended Industry Standard Architecture, referred to as: EISA) bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc.

[0081] The communication interface is used for communication between the above-mentioned wrist-type electric shock protection warning device for maintenance and other devices.

[0082] The memory may include a random access memory (RAM) or a non-volatile memory (NVM), such as at least one disk memory. Optionally, the memory may also be at least one storage device located away from the aforementioned processor.

[0083] The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gates or transistor logic devices, and discrete hardware components.

[0084] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive Solid State Disk (SSD)), etc.

[0085] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0086] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0087] 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 thereof 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.

[0088] It should be understood that the above is only an example and does not constitute any limitation on the technical solution of the present invention. In specific applications, technicians in this field can make settings as needed, and the present invention does not limit this.

[0089] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present invention. In practical applications, technicians in this field can select part or all of them according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0090] In addition, for technical details not fully described in this embodiment, reference can be made to the wrist-type electric shock prevention warning system and method for maintenance provided in any embodiment of the present invention, and will not be repeated here.

[0091] In addition, it should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0092] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0093] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory (ROM) / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0094] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

[0095] It is understandable that the system provided by the embodiment of the present invention corresponds to the method provided by the embodiment of the present invention, and the explanation, examples and beneficial effects of the relevant contents can refer to the corresponding parts in the above method.

Claims

1. A wrist-type electric shock prevention warning system for maintenance, characterized in that: The maintenance wrist-type electric shock prevention warning system includes: an electric field detection and analysis module, an intelligent distance tracking module, an AD conversion module, a single-chip microcomputer, an audible and visual alarm control module, a switch automatic control module and a power supply control module, wherein the power supply control module is used to supply power to the electric field detection and analysis module, the intelligent distance tracking module, the AD conversion module, the single-chip microcomputer, the audible and visual alarm control module and the switch automatic control module; The switch automatic control module is used to adjust the maintenance wrist-type electric shock prevention warning system to the operating state in response to the use request of the staff; The electric field detection and analysis module is used to obtain the original power frequency electric field signal after the maintenance wrist-type electric shock prevention warning system is in operation, and process the original collected power frequency electric field signal to obtain the target power frequency electric field signal, and forward the target power frequency electric field signal to the single chip microcomputer through the AD conversion module; The single chip microcomputer is used to determine the voltage level corresponding to the charged object according to the received target power frequency electric field signal, determine the safety distance according to the voltage level, and set the first warning distance and the second warning distance according to the safety distance; The intelligent distance tracking module is used to obtain the current distance between the worker and the charged object, and send the current distance to the single chip microcomputer; The single chip microcomputer is used to make a warning judgment based on the first warning distance, the second warning distance and the current distance, generate a warning signal if a warning is required, and send the warning signal to the sound and light alarm control module; The sound and light alarm control module is used to give early warning prompts to staff according to the received early warning signal.

2. The maintenance wrist-type electric shock prevention warning system according to claim 1, characterized in that: The electric field detection and analysis module includes several electric field sensors, and the electric field detection and analysis module is used to obtain the sub-industrial frequency electric field signals obtained by each electric field sensor, fuse the several sub-industrial frequency electric field signals to obtain the original industrial frequency electric field signal, and denoise the original industrial frequency electric field signal to obtain the target industrial frequency electric field signal.

3. The maintenance wrist-type electric shock prevention warning system as claimed in claim 2, characterized in that: The electric field detection and analysis module is used to obtain the sub-industrial frequency electric field signal corresponding to any electric field sensor based on several sub-industrial frequency electric field signals, determine the observation value and measurement value corresponding to the any electric field sensor based on the sub-industrial frequency electric field signal, and determine the observation value standard deviation and measurement value standard deviation corresponding to all sensors based on the dry sub-industrial frequency electric field signal, and fuse the several sub-industrial frequency electric field signals based on the observation value, the measurement value, the observation value standard deviation and the measurement value standard deviation.

4. The maintenance wrist-type electric shock prevention warning system as claimed in claim 2, characterized in that: The electric field detection and analysis module is used to transform the original power frequency electric field signal using wavelet transform to obtain a reference power frequency electric field signal, determine a coefficient compression method, determine a corresponding threshold function based on the coefficient compression method, compress the wavelet coefficients based on the threshold function, and use the compressed wavelet coefficients to denoise the reference power frequency electric field signal to obtain a target power frequency electric field signal.

5. The maintenance wrist-type electric shock prevention warning system according to claim 1, characterized in that: The single chip microcomputer is used to construct a line density matrix of the wire corresponding to the charged object according to the received target industrial frequency electric field signal, and to construct a matrix equation of equivalent charge, to determine the equivalent charge per unit length based on the charge density matrix of the wire, the matrix equation of equivalent charge and the potential coefficient matrix of the wire, to determine the electric field strength at the position of the worker in the space based on the equivalent charge per unit length, and to determine the voltage level corresponding to the charged object according to the electric field strength.

6. The maintenance wrist-type electric shock prevention warning system according to any one of claims 1 to 5, characterized in that: The first warning distance is greater than the second warning distance, and the single-chip microcomputer is used to compare the current distance with the first warning distance and the second warning distance. If the current safety distance is less than the first warning distance, it is determined that a warning is needed. If the current safety distance is less than the first warning distance and greater than the second warning distance, the current warning level is determined to be the first warning level, and a warning signal is generated based on the first warning level. If the current safety distance is less than or equal to the second warning distance, the current warning level is determined to be the second warning level, and a warning signal is generated based on the second warning level.

7. The maintenance wrist-type electric shock prevention warning system according to claim 6, characterized in that: in, The sound and light alarm control module includes a vibration warning module and a buzzer. The sound and light alarm control module is used to determine the warning level according to the warning signal. If the warning level is the first warning level, the buzzer is triggered to buzz the staff. If the warning level is the second warning level, the buzzer is triggered to buzz the staff and the vibration warning module is triggered to vibrate the staff.

8. A wrist-type electric shock prevention warning method for maintenance, characterized in that: The maintenance wrist-type electric shock prevention warning method is applied to the maintenance wrist-type electric shock prevention warning system according to any one of claims 1 to 7, and the maintenance wrist-type electric shock prevention warning method includes: The switch automatic control module adjusts the maintenance wrist-type electric shock prevention warning system to the operating state in response to the staff's use request; The electric field detection and analysis module obtains the original power frequency electric field signal after the maintenance wrist-type electric shock prevention warning system is in operation, processes the original collected power frequency electric field signal to obtain the target power frequency electric field signal, and forwards the target power frequency electric field signal to the single chip microcomputer through the AD conversion module; The single chip computer determines the voltage level corresponding to the charged object according to the received target power frequency electric field signal, determines the safety distance according to the voltage level, and sets the first warning distance and the second warning distance according to the safety distance; The intelligent distance tracking module obtains the current distance between the worker and the charged object, and sends the current distance to the single chip microcomputer; The single chip computer makes a warning judgment based on the first warning distance, the second warning distance and the current distance, generates a warning signal if a warning is required, and sends the warning signal to the sound and light alarm control module; The sound and light alarm control module provides an early warning prompt to the staff according to the received early warning signal.

9. The maintenance wrist-type electric shock prevention warning method according to claim 8, characterized in that: The electric field detection and analysis module includes a plurality of electric field sensors, and the processing of the original collected power frequency electric field signal to obtain the target power frequency electric field signal includes: The electric field detection and analysis module obtains the sub-power frequency electric field signals obtained by each electric field sensor, fuses several sub-power frequency electric field signals to obtain the original power frequency electric field signal, and performs denoising on the original power frequency electric field signal to obtain the target power frequency electric field signal.

10. The maintenance wrist-type electric shock prevention warning method according to claim 9, characterized in that: The fusion of several sub-industrial frequency electric field signals includes: The electric field detection and analysis module obtains the sub-industrial frequency electric field signal corresponding to any electric field sensor based on several sub-industrial frequency electric field signals, determines the observation value and measurement value corresponding to the any electric field sensor based on the sub-industrial frequency electric field signal, and determines the observation value standard deviation and measurement value standard deviation corresponding to all sensors based on the dry sub-industrial frequency electric field signal, and fuses the several sub-industrial frequency electric field signals based on the observation value, the measurement value, the observation value standard deviation and the measurement value standard deviation.

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