CN115343542A - Method, device, equipment and medium for marking safe operation range of operator - Google Patents
Method, device, equipment and medium for marking safe operation range of operator Download PDFInfo
- Publication number
- CN115343542A CN115343542A CN202211270082.2A CN202211270082A CN115343542A CN 115343542 A CN115343542 A CN 115343542A CN 202211270082 A CN202211270082 A CN 202211270082A CN 115343542 A CN115343542 A CN 115343542A
- Authority
- CN
- China
- Prior art keywords
- electric field
- information
- distance
- electric power
- power facility
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 45
- 230000005684 electric field Effects 0.000 claims abstract description 384
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 238000005259 measurement Methods 0.000 claims description 146
- 230000006870 function Effects 0.000 claims description 80
- 238000011156 evaluation Methods 0.000 claims description 70
- 238000003860 storage Methods 0.000 claims description 12
- 238000004590 computer program Methods 0.000 claims description 7
- 238000010276 construction Methods 0.000 abstract description 13
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 230000001755 vocal effect Effects 0.000 abstract 1
- 230000005686 electrostatic field Effects 0.000 description 20
- 238000010586 diagram Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 12
- 238000012545 processing Methods 0.000 description 11
- 230000006698 induction Effects 0.000 description 8
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/12—Measuring electrostatic fields or voltage-potential
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/06—Systems determining the position data of a target
- G01S15/08—Systems for measuring distance only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/86—Combinations of sonar systems with lidar systems; Combinations of sonar systems with systems not using wave reflection
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V11/00—Prospecting or detecting by methods combining techniques covered by two or more of main groups G01V1/00 - G01V9/00
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Acoustics & Sound (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention provides a method, a device, equipment and a medium for marking the safe operation range of an operator. The method comprises the following steps: determining an electric field measuring mode according to the type of the electric power facility; measuring electric field information of a plurality of positions around the electric power facility according to the electric field measuring mode, the floor area shape of the electric power facility and the voltage information of the electric power facility; determining the safe distance of the electric power facility according to the electric field information and the distance information between the plurality of positions and the electric power facility; according to safe distance, accurately set up safety range to various electric power facilities to warn the personnel that are in safety range based on ultrasonic distance detection equipment, need not the manual work and carry out rail sign and verbal suggestion, the security situation around the sustainable monitoring electric power facility can reduce personnel's mistake when the construction operation and go into danger area's probability, promotes constructor's security, and need not the power equipment and have a power failure, reduces the power supply influence that the construction brought.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a method, a device, equipment and a medium for marking the safe operation range of an operator.
Background
In the construction work in a complex area such as a substation, since there is a demand for reducing power failure as much as possible, not all the equipment of the substation is powered off during the work. Charged equipment often exists near the work area. Due to the complex structure of the transformer substation, the power failure and the difference of the live-line operation equipment in each work are different, and workers are easy to confuse, so that the risk of personal electric shock and equipment short-circuit tripping power failure caused by mistaken touch of the live-line equipment is caused. Meanwhile, when objects with long length or large volume, such as appendages, are conveyed on a working site, the objects are easy to mistakenly touch the live equipment due to improper behaviors.
The current method for preventing workers from being in electric contact with electric equipment and preventing objects from being in electric contact with the electric equipment mainly comprises the steps of using fence identification plates and the like to identify an operation range, using a station class to orally remind a worker in charge of working, monitoring the worker and the like, and has the problems of more human factors and mistaken entry into a dangerous electric area or mistaken electric equipment contact due to negligence of personnel.
Disclosure of Invention
The embodiment of the invention provides a method, a device, equipment and a medium for marking the safe operation range of an operator.
In a first aspect of the embodiments of the present invention, a method for identifying a safe operation range of an operator is provided, including:
determining an electric field measuring mode according to the type of the electric power facility;
measuring electric field information of a plurality of positions around the electric power facility according to the electric field measuring mode, the floor area shape of the electric power facility and the voltage information of the electric power facility, wherein the electric field information comprises electric field intensity and electric field direction;
determining a safe distance of the electric power facility according to the electric field information of the plurality of positions and the distance information of the plurality of positions and the electric power facility;
and setting the detection distance and the warning mode of ultrasonic distance detection equipment according to the safety distance, wherein the ultrasonic distance detection equipment is used for detecting the distance between personnel and the electric power facility.
According to an embodiment of the present invention, the measuring electric field information at a plurality of positions around the electric power facility based on the electric field measurement method, the shape of the floor of the electric power facility, and the voltage information of the electric power facility includes:
setting an initial measurement position according to the voltage information of the electric power facility;
measuring electric field information at an initial position by measuring equipment corresponding to the electric field measurement mode;
determining an evaluation function at the next position to be determined according to the electric field information at the current position, the distance information between the next position to be determined and the current position, and the electric field information at the next position to be determined, wherein when the electric field measurement is carried out at the initial position, the current position is the initial position;
determining the position of the next position to be measured as the next measuring position and determining the electric field information of the position of the next position to be measured as the electric field information of the next measuring position under the condition that the evaluation function meets the requirement;
iteratively performing the steps of determining the evaluation function and the electric field information for the next measurement location until a measurement path encompasses a footprint shape of the electric power facility, obtaining the electric field information for the plurality of locations.
According to an embodiment of the present invention, setting an initial measurement position according to voltage information of the electric power facility includes:
determining the maximum phase voltage of the electric power facility according to the voltage information of the electric power facility;
determining an initial measurement distance according to the maximum phase voltage and a measurement threshold value of the measurement equipment;
and determining the initial measuring position according to the initial measuring distance.
According to an embodiment of the present invention, obtaining an evaluation function at a next to-be-determined position according to the electric field information at the current position, the distance information between the next to-be-determined position and the current position, and the electric field information at the next to-be-determined position includes:
acquiring electric field direction information in the electric field information at the current position;
moving along the direction vertical to the electric field direction information until the angular deviation between the electric field direction information and the vertical direction of the electric field direction information measured in real time is greater than or equal to a first angular threshold value, and reaching the next position to be positioned;
measuring the electric field intensity information at the next position to be positioned;
and determining the evaluation function according to the electric field intensity information at the next position to be determined, the electric field intensity information at the current position, the current position and the next position to be determined.
According to an embodiment of the present invention, determining the evaluation function according to the electric field strength information at the next to-be-determined position, the electric field strength information at the current position, and the next to-be-determined position includes:
according to the formula
According to an embodiment of the invention, the method further comprises:
under the condition that the evaluation function does not meet the requirement, reducing the first angle threshold value to obtain a second angle threshold value;
determining the next position to be positioned according to the second angle threshold;
measuring the electric field intensity information at the next position to be positioned;
and determining the evaluation function according to the electric field intensity information at the next position to be determined, the electric field intensity information at the current position, the current position and the next position to be determined.
According to an embodiment of the present invention, determining the safe distance of the electric power facility from the electric field information of the plurality of locations and the distance information of the plurality of locations from the electric power facility includes:
obtaining voltage information at a plurality of positions according to the electric field information at the plurality of positions;
obtaining voltage differences between the voltages at the positions and the safety voltage according to the voltage information at the positions and the preset safety voltage;
determining an adjusting direction and an adjusting distance according to the voltage difference and the electric field information;
and adjusting the positions according to the adjusting direction and the adjusting distance to obtain the safe distance.
In a second aspect of the embodiments of the present invention, there is provided a device for identifying a safe operation range of an operator, including:
the mode determining module is used for determining an electric field measuring mode according to the type of the electric power facility;
the electric field measuring module is used for measuring electric field information of a plurality of positions around the electric power facility according to the electric field measuring mode, the floor space shape of the electric power facility and the voltage information of the electric power facility, wherein the electric field information comprises electric field intensity and electric field direction;
a safe distance module for determining safe distances of the electric power facility according to the electric field information of the plurality of positions and distance information of the plurality of positions and the electric power facility;
and the safety range module is used for setting the detection distance and the warning mode of ultrasonic distance detection equipment according to the safety distance, wherein the ultrasonic distance detection equipment is used for detecting the distance between personnel and the power facility.
According to an embodiment of the invention, the electric field measurement module is further configured to:
setting an initial measurement position according to the voltage information of the electric power facility;
measuring electric field information at an initial position by measuring equipment corresponding to the electric field measurement mode;
determining an evaluation function at the next position to be determined according to the electric field information at the current position, the distance information between the next position to be determined and the current position, and the electric field information at the next position to be determined, wherein when the electric field measurement is carried out at the initial position, the current position is the initial position;
determining the position of the next position to be measured as the next measuring position and determining the electric field information of the position of the next position to be measured as the electric field information of the next measuring position under the condition that the evaluation function meets the requirement;
iteratively performing the steps of determining the merit function and the electric field information for the next measurement location until a measurement path encompasses a footprint shape of the electric power facility, obtaining the electric field information for the plurality of locations.
According to an embodiment of the invention, the electric field measurement module is further configured to:
determining the maximum phase voltage of the electric power facility according to the voltage information of the electric power facility;
determining an initial measurement distance according to the maximum phase voltage and a measurement threshold value of the measurement equipment;
and determining the initial measurement position according to the initial measurement distance.
According to an embodiment of the invention, the electric field measurement module is further configured to:
acquiring electric field direction information in the electric field information at the current position;
moving along the direction vertical to the electric field direction information until the angular deviation between the electric field direction information and the vertical direction of the electric field direction information measured in real time is greater than or equal to a first angular threshold value, and reaching the next position to be positioned;
measuring the electric field intensity information at the next position to be positioned;
and determining the evaluation function according to the electric field intensity information at the next position to be determined, the electric field intensity information at the current position, the current position and the next position to be determined.
According to an embodiment of the invention, the electric field measurement module is further configured to:
according to the formula
According to an embodiment of the invention, the apparatus is further adapted to:
under the condition that the evaluation function does not meet the requirement, reducing the first angle threshold value to obtain a second angle threshold value;
determining the next to-be-positioned position according to the second angle threshold;
measuring the electric field intensity information at the next position to be positioned;
and determining the evaluation function according to the electric field intensity information at the next position to be determined, the electric field intensity information at the current position, the current position and the next position to be determined.
According to an embodiment of the invention, the safe distance module is further configured to:
obtaining voltage information at a plurality of positions according to the electric field information at the plurality of positions;
obtaining voltage differences between the voltages at the positions and the safety voltage according to the voltage information at the positions and the preset safety voltage;
determining an adjusting direction and an adjusting distance according to the voltage difference and the electric field information;
and adjusting the positions according to the adjusting direction and the adjusting distance to obtain the safe distance.
In a third aspect of the embodiments of the present invention, there is provided an apparatus for identifying a safe operation range of an operator, including: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to invoke the memory-stored instructions to perform the above-described method.
In a fourth aspect of the embodiments of the present invention, there is provided a computer-readable storage medium having stored thereon computer program instructions, which when executed by a processor, implement the above-mentioned method.
According to the invention, the electric field information around various complex electric power facilities of the transformer substation can be measured, the safety distances of the various electric power facilities are determined based on the measured electric field information and the measurement positions, and the ultrasonic distance detection equipment is further arranged based on the safety distances of the various electric power facilities, so that the safety range is accurately set for each electric power facility, personnel in the safety range are warned based on the ultrasonic distance detection equipment, fence identification and oral reminding do not need to be carried out manually, the safety conditions around the electric power facilities can be continuously monitored, the probability of mistaken entry of the personnel during construction operation can be reduced, the safety of constructors is improved, power failure of the electric power equipment is not needed, and power supply influence caused by construction is reduced.
Drawings
FIG. 1 is a flow diagram schematically illustrating a method of identifying a safe work scope of an operator according to an embodiment of the present invention;
FIG. 2 is a case diagram illustrating a method of identifying a safe working area of an operator according to an embodiment of the present invention;
fig. 3 is a block diagram schematically illustrating an apparatus for identifying a safe working range of a worker according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.
It should be understood that, in various embodiments of the present invention, the sequence numbers of the processes do not mean the execution sequence, and the execution sequence of the processes should be determined by the functions and the internal logic of the processes, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
It should be understood that in the present application, "comprising" and "having" and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that, in the present invention, "a plurality" means two or more. "and/or" is merely an association describing an associated object, meaning that three relationships may exist, for example, and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "comprising a, B and C", "comprising a, B, C" means that all three of a, B, C are comprised, "comprising a, B or C" means comprising one of three of a, B, C, "comprising a, B and/or C" means comprising any 1 or any 2 or 3 of three of a, B, C.
It should be understood that in the present invention, "B corresponding to a", "a corresponds to B", or "B corresponds to a" means that B is associated with a, and B can be determined from a. Determining B from a does not mean determining B from a alone, but may be determined from a and/or other information. And the matching of A and B means that the similarity of A and B is greater than or equal to a preset threshold value.
The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 1 is a flow chart schematically illustrating a method for identifying a safe working range of a worker according to an embodiment of the present invention, and as shown in fig. 1, the method includes:
step S101, determining an electric field measurement mode according to the type of the electric power facility;
step S102, measuring electric field information of a plurality of positions around the electric power facility according to the electric field measuring mode, the floor space shape of the electric power facility and the voltage information of the electric power facility, wherein the electric field information comprises electric field intensity and electric field direction;
step S103, determining safe distances of the electric power facilities according to the electric field information of the positions and distance information between the positions and the electric power facilities;
and step S104, setting the detection distance and the warning mode of ultrasonic distance detection equipment according to the safety distance, wherein the ultrasonic distance detection equipment is used for detecting the distance between personnel and the electric power facility.
According to the invention, the electric field information around various complex electric power facilities of the transformer substation can be measured, the safety distances of the various electric power facilities are determined based on the measured electric field information and the measurement positions, and the ultrasonic distance detection equipment is further arranged based on the safety distances of the various electric power facilities, so that the safety range is accurately set for each electric power facility, personnel in the safety range are warned based on the ultrasonic distance detection equipment, fence identification and oral reminding are not required to be carried out manually, the safety condition around the electric power facilities can be continuously monitored, the probability of personnel mistaken entry during construction operation can be reduced, the safety of constructors is improved, power failure of the electric power equipment is not required, and the power supply influence caused by construction is reduced.
According to the embodiment of the invention, the safety range of the walking of the electric power facility can be defined based on the electric field around the electric power facility, so that ultrasonic distance detection equipment can be arranged to measure the distance of people around and warn constructors entering the safety range, and the safety of the constructors is improved under the condition that the power failure of the electric power facility is not needed.
According to an embodiment of the present invention, different types of electric fields may be generated during operation by different types of electric facilities in step S101. Depending on the type of electric facility, it may be determined whether the electric field induced around the electric facility is an electrostatic field or an alternating electric field. The electrostatic field itself is a dc vector that induces a dc electrical signal between the sensing electrodes. The alternating electric field can change based on the preset frequency, and in the alternating electric field, an alternating current signal with the same frequency as the alternating electric field can be induced between the induction electrodes.
According to the embodiment of the present invention, since the electrostatic field and the alternating electric field have different characteristics, the manner and the measuring device for measuring the two electric fields may be different from each other. Therefore, the measurement modes for measuring the electrostatic field and the alternating electric field are different from each other, that is, the measurement mode for measuring the electrostatic field is the measurement mode for the electrostatic field, and the measurement mode for measuring the alternating electric field is the measurement mode for the alternating electric field.
According to the embodiment of the invention, as for the electrostatic field measurement mode, the measurement can be performed by a measurement device special for measuring the electrostatic field, and the measurement device special for the electrostatic field can comprise a rotary-vane type electric field measuring instrument, a Micro-electro-Mechanical System (MEMS) electrostatic field instrument and the like.
According to the embodiment of the invention, in the detection of the atmospheric electric field, a single-stator and rotor structure rotary-vane electric field measuring instrument can be used. The measuring electrode of the electric field sensor of the rotating blade type electric field measuring instrument consists of a fixed metal induction electrode plate and a grounding rotor with a certain rotating speed, the induction electrode plate is alternately shielded and exposed in an electric field through the continuous rotation of the grounding rotor in the measuring process, the induction electrode plate can generate changed charges, the induction electrode plate is grounded through a resistor, alternating current can pass through the resistor, and the electric field information can be measured by measuring the alternating current.
According to an embodiment of the present invention, the relationship between the exposed area of the sensing electrode piece and the time T during the time when the grounded rotor rotates for one period T is expressed by the following equation (1):
wherein S is N The area of the sensing electrode plate is S (t), and the exposed area of the sensing electrode plate is S (t).
According to the embodiment of the invention, in the electric field E, the induced charge is induced on the exposed area of the sensing electrode plate as shown in the following formula (2):
wherein Q (t) is the induced charge at time t, epsilon 0 Is the dielectric constant in vacuum.
According to the embodiment of the present invention, on the basis of the formulas (1) and (2), the induced charge is differentiated, and the induced current can be obtained as shown in the following formula (3):
wherein i (t) is an induced current.
According to the embodiment of the invention, since the atmospheric electric field E changes slowly in frequency and is negligible compared with the frequency of the rotation of the grounded rotor, the change of the induced current i (t) is in direct proportion to the change of the electric field E. The expansion of the induced current i (t) into a fourier series can be expressed as the following equation (4):
according to an embodiment of the present invention, simplifying equation (4), e.g., retaining only the first term, may result in the following equation (5):
according to the embodiment of the present invention, based on the approximate expression of the induced current i (t), that is, formula (5), it can be known that the induced current i (t) is a sinusoidal signal in a proportional relationship with the electric field strength E, and after the induced current is measured, the electric field E can be inversely solved based on formula (5).
According to the embodiment of the invention, the MEMS electrostatic field instrument can be used for detecting the electrostatic field, has small volume and low power consumption, is easy for batch production, and is suitable for electrostatic field measurement. The MEMS electrostatic field apparatus periodically shields the sensing electrode with the shielding electrode to obtain a varying induced current between the shielding and sensing electrodes, thereby reversely solving the electrostatic field E based on a manner similar to equation (5).
According to an embodiment of the invention, for the measurement of an alternating electric field, a measurement capacitance may be linked within the two electrodes. And the induction voltage between the two electrodes of the sensor is obtained by utilizing the accessed measuring capacitor, and the electric field information can be measured based on the voltage. The induced charge on the metal electrode of the alternating electric field sensor changes along with the time period, and the sensor electrode does not need to be driven to move relatively by means of external force like an electrostatic field measuring device, so that the structure is simple, and the manufacture is convenient. The metal electrode can use a spherical electrode, the relation between the surface charge and the electric field can be accurately calculated by using the spherical electrode, the influence of the probe on the detected electric field can be estimated, and the electric field distortion is relatively small. A hollow metal spherical shell can be divided into an upper part and a lower part, the divided upper hemisphere and the divided lower hemisphere are two electrodes, and the electrodes can be bonded together through insulating substances. In the spherical electrode, a measuring capacitor is connected with the upper hemispherical surface and the lower hemispherical surface, if the electric field sensor is placed in an electric field perpendicular to the two hemispherical surfaces of the sensor, the two spherical electrodes induce charges, and then induced voltages are generated at the two ends of the measuring capacitor, and the voltages can be used as measuring signals.
According to the embodiment of the invention, the space point of the center of the spherical electrode is O, and the electric field intensity of the O point is E before the spherical electrode is added into the electric field o And (t) is an undistorted electric field, and after the spherical electrode is placed in the spherical electrode, induced charges can be generated on the outer surfaces of the two metal hemispherical shells of the spherical electrode. Wherein the surface area of the upper hemispherical shell is S, and the charge surface density of the surface of the spherical shell is sigma s The total surface charge of the upper hemispherical shell is shown in the following equation (6):
according to the embodiment of the invention, after the spherical electrode is put into the electric field, the surface charge quantity on the spherical shell and the undistorted electric field E at the spherical center o (t) is proportional, as shown in the following equation (7):
wherein k is the number of times of transformation, and the induced charge is in the measuring capacitor C M A measurement voltage U generated thereon M (t) is shown in equation (8):
to sum up, measure the voltage U M (t) can be expressed as the following formula (9):
therefore, as can be seen from equation (9), only the measured capacitance C is typically measured M A measurement voltage U generated thereon M (t), the electric field information can be inversely solved based on the formula (9).
According to an embodiment of the present invention, after selecting an electric field measurement manner and a measurement device based on the type of an electric facility, in step S102, electric field information of a plurality of locations around the electric facility may be measured according to the electric field measurement manner, a shape of a floor space of the electric facility, and voltage information of the electric facility. In an example, the electric field information at a plurality of positions around the electric power facility can be obtained by measuring at a plurality of positions around the electric power facility by using the above-mentioned rotary-vane electric field measuring instrument, micro-electro-mechanical system electrostatic field measuring instrument or alternating electric field measuring instrument. However, this measurement method requires manual measurement, and if the distance between the measurement person and the electric power facility is short, the measurement person may be in danger by mistake when entering a dangerous area, and therefore, the measurement may be performed according to a specific measurement path using an automatic driving vehicle, a robot, or the like, and the electric field information at a plurality of measurement positions on the measurement path may be obtained.
According to an embodiment of the present invention, step S102 may include: setting an initial measurement position according to the voltage information of the electric power facility; measuring electric field information at an initial position by measuring equipment corresponding to the electric field measurement mode; determining an evaluation function at the next position to be determined according to the electric field information at the current position, the distance information between the next position to be determined and the current position, and the electric field information at the next position to be determined, wherein when the electric field measurement is carried out at the initial position, the current position is the initial position; under the condition that the evaluation function meets the requirement, determining the position to be measured as the next measuring position, and determining the electric field information of the position to be measured as the electric field information of the next measuring position; iteratively performing the steps of determining the evaluation function and the electric field information for the next measurement location until a measurement path encompasses a footprint shape of the electric power facility, obtaining the electric field information for the plurality of locations.
According to an embodiment of the present invention, an initial measurement position may be set first. Electric utilities can generate higher voltages to form electric fields in surrounding areas, and the strength of the electric fields is generally regulated such that the closer to the electric utility, the stronger the electric field strength, and the farther from the electric utility, the weaker the electric field strength. Therefore, in determining the initial measurement position, the distance to the electric facility may be considered, i.e., a suitable distance may be selected such that the electric field strength at the distance may fall within the measurement range of the measurement device.
According to an embodiment of the present invention, setting an initial measurement position according to voltage information of the electric power facility includes: determining the maximum phase voltage of the electric power facility according to the voltage information of the electric power facility; determining an initial measurement distance according to the maximum phase voltage and a measurement threshold value of the measurement equipment; and determining the initial measurement position according to the initial measurement distance.
According to an embodiment of the present invention, in order to improve safety, the maximum phase voltage among the voltage information of the electric power facility may be selected as a condition for determining the initial measurement position. The maximum phase voltage may be the maximum voltage reached during operation of the electrical facility, at which the electric field generated is the strongest.
According to the embodiment of the present invention, since the electric field strength is stronger the closer to the electric facility, and the electric field strength is weaker the farther from the electric facility. Therefore, the electric field values of the respective distances around the location of the electric power facility and the maximum phase voltage can be estimated as initial conditions, and for example, when the distance from the location of the electric power facility is a certain distance, based on the maximum phase voltage of the electric power facility, it can be solved that the electric field strength at the distance falls within the measurement threshold range of the measurement device, for example, the electric field strength is about 80% of the upper measurement limit of the measurement device, and then the distance can be determined as the initial measurement distance. The invention is not limited to a specific percentage that the electric field strength is the upper limit of the measurement.
According to the embodiment of the present invention, the initial measurement position may be determined based on the initial measurement distance, in an example, an arbitrary position where the distance to the electric power facility is equal to the initial measurement distance may be selected as the initial measurement position, and one specific position may be set as the initial measurement position among a plurality of positions where the distance to the electric power facility is equal to the initial measurement distance.
By the mode, the maximum phase voltage of the electric power facility can be selected as an initial condition to select an initial measurement position, so that the personnel safety can be still ensured when the voltage of the electric power facility reaches the maximum value, and the accuracy and the safety of a safety range are improved.
According to an embodiment of the present invention, after the initial measurement position is set, the electric field information at the initial position may be measured by a measurement apparatus corresponding to the measurement manner. For example, in the case that the type of the electric field is an electrostatic field, a rotary-vane electric field measuring instrument or a micro electro mechanical system electrostatic field measuring instrument may be selected to measure the electric field information at the initial position. For another example, in the case where the electric field type is an alternating electric field, an alternating electric field measuring device based on a spherical electrode may be selected to measure electric field information at the initial position.
According to the embodiment of the invention, the initial measurement position is taken as a starting point, the measurement position is changed continuously, and the measurement is carried out at each measurement position, so that the electric field information of each measurement position is obtained. Moreover, the measurement position is not determined randomly, but the proper measurement position can be selected continuously for measurement, so that more valuable measurement data can be obtained, and a more powerful data basis is provided for determining the safe distance and the safe range.
According to the embodiment of the present invention, the measurement position may be determined by evaluating a function, and electric field information at the measurement position is obtained. Obtaining an evaluation function of the next position to be determined according to the electric field information of the current position, the distance information between the next position to be determined and the current position, and the electric field information of the next position to be determined, including: acquiring electric field direction information in the electric field information at the current position; moving along the direction vertical to the electric field direction information until the angular deviation between the electric field direction information and the vertical direction of the electric field direction information measured in real time is greater than or equal to a first angular threshold value, and reaching the next position to be positioned; measuring the electric field intensity information at the next position to be positioned; and determining the evaluation function according to the electric field intensity information at the next position to be determined, the electric field intensity information at the current position, the current position and the next position to be determined.
According to the embodiment of the present invention, after obtaining the electric field information of the initial measurement position, the electric field strength and the electric field direction of the initial measurement position can be determined. The second measurement position can be moved in a direction perpendicular to the direction of the electric field when it is determined. Since the electric field is not generally uniformly distributed, the direction perpendicular to the electric field at the initial position deviates from the direction perpendicular to the electric field after a certain distance of movement. Therefore, the movement can be stopped when the deviation from the direction perpendicular to the electric field reaches the first angle threshold, and the position to be positioned is reached. In this case, by the above measuring device, the electric field information, for example, the electric field strength information, of the position to be positioned is measured, and the evaluation function is determined based on the electric field strength information of the position to be positioned, the electric field strength information at the initial position, and the position to be positioned.
According to the embodiment of the invention, the evaluation function can comprehensively consider the distance between the to-be-positioned position and the initial position and the electric field intensity difference between the to-be-positioned position and the initial position. The distance between the two measuring positions is not too far so as to avoid larger error of the set safety range and not too close so as to avoid too many measuring positions and too large data volume in the measuring process and reduce the measuring efficiency. The difference of the electric field intensities between the two measuring positions is not too large, otherwise, the difference of the electric field intensities between the two measuring positions is too large, the difference of the data calibers of the two measuring positions is too large, and the safety range is difficult to be defined based on the two measuring positions, or the error of the defined safety range is large.
According to an embodiment of the present invention, determining the evaluation function according to the electric field strength information at the next to-be-determined position, the electric field strength information at the current position, and the next to-be-determined position includes:
obtaining the evaluation function F according to the formula (10),
wherein,
is the position to be positioned next to be positioned,
is the current position of the mobile phone, and is,
the electric field strength in the x direction of the electric field at the position to be positioned next,
the electric field intensity in the y direction of the electric field at the next position to be positioned,
the electric field strength in the z direction of the electric field at the position to be measured next,
the electric field strength in the x-direction of the electric field at the current location,
the electric field strength in the y-direction of the electric field at the current location,
and A is a preset weight coefficient, and is the electric field intensity of the electric field at the current position in the z direction.
According to an embodiment of the present invention, in the formula (10), the distance between the current position (e.g., the initial measurement position) and the next to-be-measured position (e.g., the to-be-measured position) and the strength difference of the components in the three directions of the electric field between the current position (e.g., the initial measurement position) and the next to-be-measured position (e.g., the to-be-measured position) are included in the evaluation function F. And in order to save processing resources, the distance between the two positions can be a two-dimensional distance.
By the method, the evaluation function comprises information of two dimensions, namely the distance between two positions and the electric field intensity difference, the objectivity of the evaluation function is improved, the two-dimensional distance is adopted in the distance dimension, the calculation amount is reduced, and the calculation resources are saved.
According to the embodiment of the invention, under the condition that the evaluation function meets the requirement, the position to be positioned can be determined as the second measurement position, for example, a range can be set, if the value of the evaluation function is in the set range, the evaluation function meets the requirement, otherwise, the evaluation function does not meet the requirement. If the evaluation function meets the requirements, the electric field information of the position to be measured can be determined as the electric field information of the second measurement position.
According to the embodiment of the invention, the step of determining the evaluation function and the electric field information may be performed iteratively, for example, moving from the second measurement position to a third position to be measured according to the electric field information of the second measurement position, and determining the evaluation function based on the electric field information of the third position to be measured and the distance from the second measurement position, and further determining whether the evaluation function meets the requirement, and obtaining the electric field information of the third measurement position and the third measurement position when the evaluation function meets the requirement. Further, the electric field information of the third measuring position can be moved from the third measuring position to the fourth waiting position, an evaluation function is determined based on the electric field information of the fourth waiting position and the distance between the electric field information and the third measuring position, whether the evaluation function meets the requirement is further determined, and the electric field information of the fourth measuring position are obtained when the evaluation function meets the requirement.
According to the embodiment of the present invention, it is needless to say that there may be a case where the evaluation function does not satisfy the requirement, for example, if the evaluation function does not fall within the set range, the evaluation function does not satisfy the requirement. In this case, the method further comprises: under the condition that the evaluation function is not in accordance with the requirement, reducing the first angle threshold value to obtain a second angle threshold value; determining the next position to be positioned according to the second angle threshold; measuring the electric field intensity information at the next position to be positioned; and determining the evaluation function according to the electric field intensity information at the next position to be determined, the electric field intensity information at the current position, the current position and the next position to be determined.
According to the embodiment of the invention, under the condition that the evaluation function is not qualified, the current position can be returned, the first angle threshold value is reduced, and the second angle threshold value is obtained. The next position to be determined based on the second angle threshold is closer to the current position, and the electric field information at the two positions is also closer. The electric field strength information can be determined at the next position to be measured which is determined based on the second angle threshold, the electric field strength information at the next position to be measured, the electric field strength information at the current position, the current position and the distance information between the next position to be measured are substituted into the formula (10), the evaluation function is re-determined, whether the evaluation function meets the requirement or not is re-determined, if the evaluation function meets the requirement, the next position to be measured is determined as the next position to be measured, if the evaluation function does not meet the requirement, the steps can be executed in an iterative mode, namely, the second angle threshold is continuously reduced, the next position to be measured is re-determined, the evaluation function is re-determined, and therefore the processing of whether the next position to be measured meets the requirement or not is determined until the evaluation function meets the requirement, and then the next position to be measured can be determined.
According to the embodiments of the present invention, a plurality of measurement positions may be determined a plurality of times and electric field information at the plurality of measurement positions may be obtained, and the measurement process may be ended in a case where a measurement path composed of the plurality of measurement positions surrounds a floor space shape of the electric power facility, that is, electric field information of a plurality of positions around the electric power facility has been obtained, and the measurement process may be ended and electric field information of all positions around the electric power facility may be represented by electric field information of a plurality of positions around the electric power facility.
By the mode, the measuring positions can be automatically determined through the evaluation function, the electric field information of each measuring position can be obtained, the electric field information of all the positions around the electric power facility can be represented through the electric field information of the plurality of measuring positions around the electric power facility, the electric field information around the electric power facility can be automatically measured, and the convenience and the safety of measurement can be improved.
According to an embodiment of the present invention, after obtaining electric field information of a plurality of locations around the electric power facility, in step S103, a safe distance of the electric power facility may be determined. For example, the electric field intensity may be reduced within a safe range when the electric power facilities are spaced apart by a certain distance, or the voltage induced by the electric field may be reduced within the safe range, based on the electric field information of a plurality of locations around a plurality of facilities and the distance between each location and the electric power facilities.
According to an embodiment of the present invention, step S103 may include: obtaining voltage information at a plurality of positions according to the electric field information at the plurality of positions; obtaining voltage differences between the voltages at the positions and the safety voltage according to the voltage information at the positions and the preset safety voltage; determining an adjusting direction and an adjusting distance according to the voltage difference and the electric field information; and adjusting the positions according to the adjusting direction and the adjusting distance to obtain the safe distance.
According to an embodiment of the present invention, voltage information at a plurality of positions may be determined from the electric field information, and in an example, the voltage information may include an induced voltage, for example, according to equation (9), an induced voltage at a position in an alternating electric field may be determined, according to equation (5), an induced current at a position in an electrostatic field may be determined, and thus the induced voltage may be determined. The invention is not limited to the specific manner of determining the induced voltage.
According to the embodiment of the invention, the voltage difference between the voltage information at each position and the preset safe voltage can be determined, for example, if the voltage information at each position is higher than the safe voltage, the voltage difference between the two can exist, in other words, the voltage information at each position does not reach the safe requirement and needs to be further away from the electric power facility. Otherwise, the safety requirements are met at all positions, the safety distance can be set to be smaller, and the influence on construction can be further reduced.
According to an embodiment of the present invention, an adjustment direction and an adjustment distance may be determined according to the voltage difference and the electric field information. In an example, the voltage difference is equal to a product of the electric field strength and the distance, and thus, in a case where the voltage information is higher than the safety voltage, the adjustment distance may be determined based on a ratio between the voltage difference and the electric field strength, and the adjustment direction may be determined as a direction away from the electric facility. Conversely, in the case where the voltage information is lower than the safety voltage, the adjustment distance may be determined based on the ratio between the voltage difference and the electric field strength, and the adjustment direction may be determined as the direction approaching the electric power facility. Of course, for safety, when the voltage information is lower than the safety voltage and the voltage difference is within a certain threshold range, no adjustment is performed, thereby improving the safety of personnel. The invention is not limited in this regard.
According to the embodiment of the invention, after the adjustment direction and the adjustment distance are determined, each position can be adjusted along the electric field direction, for example, in the case that the voltage information is higher than the safety voltage, the adjustment can be performed along the electric field direction at the measurement position in the direction away from the electric power facility, the adjusted distance is the adjustment distance, the distance between the adjusted position and the electric power facility is the safety distance, and the voltage at the distance can reach the safety requirement. For another example, when the voltage information is lower than the safety voltage, the voltage information may be adjusted in a direction approaching the electric power facility along the electric field direction at the measurement position, the adjusted distance is an adjustment distance, the distance between the adjusted position and the electric power facility is a safety distance, and the voltage at the distance can meet the safety requirement.
By the method, the induction voltage can be estimated based on the electric field intensity and the voltage information, and the adjustment distance and the adjustment direction can be estimated based on the voltage difference between the induction voltage and the safety voltage, so that the safety distance can be determined more accurately, and the influence on construction can be reduced under the condition of ensuring safety.
According to an embodiment of the present invention, in step S104, a detection distance and a warning mode of an ultrasonic distance detection device for detecting a distance of a person from an electric power facility may be set according to a safety distance. In an example, a safety range may be obtained from a plurality of adjusted positions, for example, connecting the respective adjusted positions may obtain an area range around the electric power facility, outside of which is the safety range, and inside of which is the danger range.
According to the embodiment of the present invention, the ultrasonic distance detection device may be disposed within the area, or may be disposed on a boundary line of the area, or may be disposed within the electric power facility, which is not limited by the present invention.
According to the embodiment of the present invention, the ultrasonic distance detection apparatus can detect the distance between a person and an area range in real time, and can warn if the distance between the person and the boundary of the area range. Depending on the distance from the boundary of the area range, a variety of warning modes may be set. For example, the safe distance is 0.7m around an electric facility having a maximum phase voltage of 10kV, 1m around an electric facility having a maximum phase voltage of 35kV, 1.5m around an electric facility having a maximum phase voltage of 110kV, and 3m around an electric facility having a maximum phase voltage of 220 kV. Taking a 220kV electric power facility as an example, if the distance between the boundary of the area range and the electric power facility is 3m, the warning mode can be turned on and the warning lamp can flash when the distance between the personnel and the boundary of the area range is 3m, the warning sound can be emitted when the distance between the personnel and the boundary of the area range is 1m, and when the personnel reaches the boundary of the area range, the warning sound can be emitted, and a warning notice can be emitted to the safety personnel to request the safety personnel to assist in management. The above distance from the boundary of the area range is merely an example, and the warning mode may also be set in other ways, for example, based on the distance from the electric power facility; the warning mode and the like are set based on the distance from the boundary of the electric facility or the area range, the ratio to the safe distance, and the present invention does not limit this.
According to the invention, the electric field information around various complex electric power facilities of the transformer substation can be measured, the safety distances of the various electric power facilities are determined based on the measured electric field information and the measurement positions, the maximum phase voltage of the electric power facilities is selected as a parameter when the safety distances are measured, the personnel safety can be still ensured when the voltage of the electric power facilities reaches the maximum value, the accuracy and the safety of a safety range are improved, the information of two dimensions including the distance and the electric field intensity difference is used when the measurement path of the electric field information is selected, the objectivity of an evaluation function is improved, and in the distance dimension, a two-dimensional distance is adopted, the operation amount is reduced, and the operation resources are saved. And the induced voltage can be estimated based on the electric field intensity and the voltage information, and the adjustment distance and the adjustment direction can be estimated based on the voltage difference between the induced voltage and the safe voltage, so that the safe distance can be determined more accurately, and the influence on construction can be reduced under the condition of ensuring safety. Furthermore, ultrasonic distance detection equipment can be set based on the safe distance of various electric power facilities, so that the safe range of each electric power facility is accurately set, personnel in the safe range are warned based on the ultrasonic distance detection equipment, manual fence identification and oral reminding are not needed, the safety conditions around the electric power facilities can be continuously monitored, the probability of personnel entering by mistake during construction operation can be reduced, the safety of constructors is improved, power failure of the electric power equipment is not needed, and power supply influence caused by construction is reduced.
Fig. 2 is a schematic diagram illustrating an example of a method for identifying a safe working range of an operator according to an embodiment of the present invention, where no electric power facility is located in a solid frame and an arrow of a solid line is an electric field line, as shown in fig. 2.
According to an embodiment of the present invention, an initial position, i.e., a first position where electric field measurement is performed, may be set, and electric field information at the position may be measured. And moving along the direction vertical to the direction of the electric field at the position until the angular deviation between the direction and the direction vertical to the direction of the electric field measured in real time is greater than or equal to a first angular threshold value, reaching the position to be positioned at the position 2, determining whether the preset position meets the requirement based on the evaluation function determined by the formula (10), if the position to be positioned meets the requirement, determining the position to be positioned as the position 2, measuring the information of the electric field at the position 2, and otherwise, reducing the first angular threshold value, and obtaining the position to be positioned again. The above steps may be iterated multiple times until the measurement path (i.e., the path enclosed by the dashed arrow in fig. 2) encloses the power facility, i.e., the electric field information for multiple locations, e.g., the electric field information for initial location, location 2, location 3, location 4, location 5, location 6, location 7, location 8, etc., may be obtained. And the difference of the electric field information among the positions is small, and the distance between the positions is within a proper distance range, so that the accuracy of defining the safety range can be improved.
According to the embodiment of the invention, after the electric field information of a plurality of positions is determined, the adjusting direction and the adjusting distance can be determined based on the voltage difference between the induced voltage and the safety voltage at each position, and adjustment is performed, for example, if the induced voltage is higher than the safety voltage, adjustment can be performed in a direction away from the electric power facility, and the adjusted positions are connected, so that the safety range boundary can be obtained.
According to the embodiment of the invention, the ultrasonic distance detection equipment can be arranged on the safety range boundary or in the electric power facility, the warning mode is set, and when the personnel are at different distances from the safety range boundary, the personnel can be warned by adopting different warning modes, so that the personnel can be prevented from entering the safety range boundary by mistake, and the safety of the personnel is improved.
Fig. 3 is a block diagram schematically illustrating an apparatus for identifying a safe working range of a worker according to an embodiment of the present invention, and as shown in fig. 3, the apparatus includes:
the mode determining module 11 is used for determining an electric field measuring mode according to the type of the electric facility;
the electric field measurement module 12 is configured to measure electric field information of a plurality of positions around the electric power facility according to the electric field measurement manner, the floor space shape of the electric power facility, and the voltage information of the electric power facility, where the electric field information includes an electric field intensity and an electric field direction;
a safe distance module 13, configured to determine a safe distance of the electric power facility according to the electric field information of the plurality of locations and distance information between the plurality of locations and the electric power facility;
and a safety range module 14 for setting a detection range and a warning mode of an ultrasonic range detection device for detecting a distance between a person and the electric power facility, according to the safety range.
According to an embodiment of the invention, the electric field measurement module is further configured to:
setting an initial measurement position according to the voltage information of the electric power facility;
measuring electric field information at an initial position by measuring equipment corresponding to the electric field measurement mode;
determining an evaluation function at the next position to be determined according to the electric field information at the current position, the distance information between the next position to be determined and the current position, and the electric field information at the next position to be determined, wherein when the electric field measurement is carried out at the initial position, the current position is the initial position;
determining the position of the next position to be measured as the next measuring position and determining the electric field information of the position of the next position to be measured as the electric field information of the next measuring position under the condition that the evaluation function meets the requirement;
iteratively performing the steps of determining the evaluation function and the electric field information for the next measurement location until a measurement path encompasses a footprint shape of the electric power facility, obtaining the electric field information for the plurality of locations.
According to an embodiment of the invention, the electric field measurement module is further configured to:
determining the maximum phase voltage of the electric power facility according to the voltage information of the electric power facility;
determining an initial measurement distance according to the maximum phase voltage and a measurement threshold value of the measurement equipment;
and determining the initial measurement position according to the initial measurement distance.
According to an embodiment of the invention, the electric field measurement module is further configured to:
acquiring electric field direction information in the electric field information at the current position;
moving along the direction vertical to the electric field direction information until the angle deviation between the electric field direction information and the vertical direction of the electric field direction information measured in real time is greater than or equal to a first angle threshold value, and reaching the next position to be positioned;
measuring the electric field intensity information at the next position to be positioned;
and determining the evaluation function according to the electric field intensity information at the next position to be determined, the electric field intensity information at the current position, the current position and the next position to be determined.
According to an embodiment of the invention, the electric field measurement module is further configured to:
according to the formula
According to an embodiment of the invention, the apparatus is further configured to:
under the condition that the evaluation function does not meet the requirement, reducing the first angle threshold value to obtain a second angle threshold value;
determining the next to-be-positioned position according to the second angle threshold;
measuring the electric field intensity information at the next position to be positioned;
and determining the evaluation function according to the electric field intensity information at the next position to be determined, the electric field intensity information at the current position, the current position and the next position to be determined.
According to an embodiment of the invention, the safe distance module is further configured to:
obtaining voltage information at a plurality of positions according to the electric field information at the plurality of positions;
obtaining voltage differences between the voltages at the positions and the safety voltage according to the voltage information at the positions and the preset safety voltage;
determining an adjusting direction and an adjusting distance according to the voltage difference and the electric field information;
and adjusting the positions according to the adjusting direction and the adjusting distance to obtain the safe distance.
The present invention may be methods, apparatus, systems and/or computer program products. The computer program product may include a computer-readable storage medium having computer-readable program instructions embodied therein for carrying out aspects of the present invention.
The computer readable storage medium may be a tangible device that can hold and store the instructions for use by the instruction execution device. The computer readable storage medium may be, for example, but not limited to, an electronic memory device, a magnetic memory device, an optical memory device, an electromagnetic memory device, a semiconductor memory device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a Static Random Access Memory (SRAM), a portable compact disc read-only memory (CD-ROM), a Digital Versatile Disc (DVD), a memory stick, a floppy disk, a mechanical coding device, such as punch cards or in-groove projection structures having instructions stored thereon, and any suitable combination of the foregoing. Computer-readable storage media as used herein is not to be construed as transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission medium (e.g., optical pulses through a fiber optic cable), or electrical signals transmitted through electrical wires.
The computer-readable program instructions described herein may be downloaded from a computer-readable storage medium to a respective computing/processing device, or to an external computer or external storage device via a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers and/or edge servers. The network adapter card or network interface in each computing/processing device receives computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in the respective computing/processing device.
The computer program instructions for carrying out operations of the present invention may be assembler instructions, instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider). In some embodiments, aspects of the present invention are implemented by personalizing an electronic circuit, such as a programmable logic circuit, a Field Programmable Gate Array (FPGA), or a Programmable Logic Array (PLA), with state information of computer-readable program instructions, which can execute the computer-readable program instructions.
Aspects of the present invention are described herein with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer readable program instructions.
These computer-readable program instructions may be provided to a processing unit of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processing unit of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer-readable program instructions may also be stored in a computer-readable storage medium that can direct a computer, programmable data processing apparatus, and/or other devices to function in a particular manner, such that the computer-readable medium storing the instructions comprises an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.
The computer readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer, other programmable apparatus or other devices implement the functions/acts specified in the flowchart and/or block diagram block or blocks.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
It is noted that, unless expressly stated otherwise, all the features disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features. Where used, further, preferably, still further and more preferably is a brief introduction to the description of the other embodiment based on the foregoing embodiment, the combination of the contents of the further, preferably, still further or more preferably back strap with the foregoing embodiment being a complete construction of the other embodiment. Several further, preferred, still further or more preferred arrangements of the belt after the same embodiment may be combined in any combination to form a further embodiment.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method of identifying a safe working range of an operator, comprising:
determining an electric field measuring mode according to the type of the electric power facility;
measuring electric field information of a plurality of positions around the electric power facility according to the electric field measuring mode, the floor space shape of the electric power facility and the voltage information of the electric power facility, wherein the electric field information comprises electric field intensity and electric field direction;
determining a safe distance of the electric power facility according to the electric field information of the plurality of positions and the distance information of the plurality of positions from the electric power facility;
and setting the detection distance and the warning mode of ultrasonic distance detection equipment according to the safety distance, wherein the ultrasonic distance detection equipment is used for detecting the distance between personnel and the electric power facility.
2. The method of claim 1, wherein measuring the electric field information at a plurality of locations around the electric utility based on the electric field measurement, the shape of the electric utility's footprint, and the electric utility's voltage information comprises:
setting an initial measurement position according to the voltage information of the electric power facility;
measuring electric field information at an initial position by measuring equipment corresponding to the electric field measurement mode;
determining an evaluation function at the next position to be determined according to the electric field information at the current position, the distance information between the next position to be determined and the current position, and the electric field information at the next position to be determined, wherein when the electric field measurement is carried out at the initial position, the current position is the initial position;
determining the position of the next position to be measured as the next measuring position and determining the electric field information of the position of the next position to be measured as the electric field information of the next measuring position under the condition that the evaluation function meets the requirement;
iteratively performing the steps of determining the evaluation function and the electric field information for the next measurement location until a measurement path encompasses a footprint shape of the electric power facility, obtaining the electric field information for the plurality of locations.
3. The method of claim 2, wherein setting an initial measurement location based on the voltage information of the electrical utility comprises:
determining the maximum phase voltage of the electric power facility according to the voltage information of the electric power facility;
determining an initial measurement distance according to the maximum phase voltage and a measurement threshold value of the measurement equipment;
and determining the initial measurement position according to the initial measurement distance.
4. The method of claim 2, wherein determining the evaluation function at the next to-be-determined position according to the electric field information at the current position, the distance information from the current position at the next to-be-determined position, and the electric field information at the next to-be-determined position comprises:
acquiring electric field direction information in the electric field information at the current position;
moving along the direction vertical to the electric field direction information until the angular deviation between the electric field direction information and the vertical direction of the electric field direction information measured in real time is greater than or equal to a first angular threshold value, and reaching the next position to be positioned;
measuring the electric field intensity information at the next position to be positioned;
and determining the evaluation function according to the electric field intensity information at the next position to be determined, the electric field intensity information at the current position, the current position and the next position to be determined.
5. The method of claim 4, wherein determining the evaluation function according to the electric field strength information at the next to-be-determined position, the electric field strength information at the current position, and the next to-be-determined position comprises:
according to the formula
6. The method of claim 4, further comprising:
under the condition that the evaluation function does not meet the requirement, reducing the first angle threshold value to obtain a second angle threshold value;
determining the next position to be positioned according to the second angle threshold;
measuring the electric field intensity information at the next position to be positioned;
and determining the evaluation function according to the electric field intensity information at the next position to be determined, the electric field intensity information at the current position, the current position and the next position to be determined.
7. The method of claim 1, wherein determining a safe distance of the electrical facility from the electric field information for the plurality of locations and distance information for the plurality of locations from the electrical facility comprises:
obtaining voltage information at a plurality of positions according to the electric field information at the plurality of positions;
obtaining voltage differences between the voltages at the positions and the safety voltage according to the voltage information at the positions and the preset safety voltage;
determining an adjusting direction and an adjusting distance according to the voltage difference and the electric field information;
and adjusting the positions according to the adjusting direction and the adjusting distance to obtain the safe distance.
8. An apparatus for identifying a safe working range of a worker, comprising:
the mode determining module is used for determining an electric field measuring mode according to the type of the electric power facility;
the electric field measuring module is used for measuring electric field information of a plurality of positions around the electric power facility according to the electric field measuring mode, the floor space shape of the electric power facility and the voltage information of the electric power facility, wherein the electric field information comprises electric field intensity and electric field direction;
a safe distance module, configured to determine a safe distance of the electric power facility according to the electric field information of the plurality of locations and distance information between the plurality of locations and the electric power facility;
and the safety range module is used for setting the detection distance and the warning mode of ultrasonic distance detection equipment according to the safety distance, wherein the ultrasonic distance detection equipment is used for detecting the distance between personnel and the electric power facility.
9. An apparatus for identifying a safe working range of a worker, comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to invoke the memory-stored instructions to perform the method of any of claims 1 to 7.
10. A computer readable storage medium having computer program instructions stored thereon, which when executed by a processor implement the method of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211270082.2A CN115343542B (en) | 2022-10-18 | 2022-10-18 | Method, device, equipment and medium for marking safe operation range of operator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211270082.2A CN115343542B (en) | 2022-10-18 | 2022-10-18 | Method, device, equipment and medium for marking safe operation range of operator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115343542A true CN115343542A (en) | 2022-11-15 |
| CN115343542B CN115343542B (en) | 2023-04-07 |
Family
ID=83957258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211270082.2A Active CN115343542B (en) | 2022-10-18 | 2022-10-18 | Method, device, equipment and medium for marking safe operation range of operator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115343542B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116256742A (en) * | 2023-05-15 | 2023-06-13 | 国网天津市电力公司滨海供电分公司 | Live working safety distance monitoring method and device |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101696990A (en) * | 2009-10-20 | 2010-04-21 | 重庆大学 | Method for testing electricity of ultrahigh-voltage transmission line based on electric field measurement and system thereof |
| CN103412198A (en) * | 2013-07-22 | 2013-11-27 | 中国人民解放军92537部队 | Measuring device and measuring method of three-dimensional space distribution characteristic of ship protective electric field |
| CN203552555U (en) * | 2013-11-11 | 2014-04-16 | 黄河科技学院 | Experiment device for plotting electrostatic field with simulation method |
| CN105448035A (en) * | 2015-12-28 | 2016-03-30 | 云南电网有限责任公司电力科学研究院 | High-voltage line proximity early warning method and device |
| US20170067951A1 (en) * | 2015-09-08 | 2017-03-09 | Cpg Technologies, Llc | Field Strength Monitoring for Optimal Performance |
| JP2017187376A (en) * | 2016-04-05 | 2017-10-12 | 国立研究開発法人情報通信研究機構 | Electric field detection output device |
| CN107679321A (en) * | 2017-09-29 | 2018-02-09 | 重庆大学 | The calculating of a kind of high voltage ac/dc and circuit complex electrical field and optimization method |
| US20180246155A1 (en) * | 2016-07-01 | 2018-08-30 | U.S.A. As Represented By The Administrator Of The National Aeronautics And Space Administration | Dynamic Multidimensional Electric Potential and Electric Field Quantitative Measurement System and Method |
| CN109633375A (en) * | 2018-12-21 | 2019-04-16 | 云南电网有限责任公司电力科学研究院 | A kind of power distribution network safe distance recognition methods and device |
| CN110988499A (en) * | 2019-10-21 | 2020-04-10 | 武汉大学 | Antenna radiation characteristic obtaining method based on phase-free near field measurement |
| CN111192432A (en) * | 2019-11-20 | 2020-05-22 | 中国电力科学研究院有限公司 | Working bucket safety distance monitoring method and device, working bucket and insulating bucket arm vehicle |
| CN111207787A (en) * | 2019-12-30 | 2020-05-29 | 国网河南省电力公司郑州供电公司 | High-voltage transmission line construction distance early warning device and method thereof |
| CN111650446A (en) * | 2020-06-05 | 2020-09-11 | 南方电网数字电网研究院有限公司 | Power parameter measuring method, system, device, computer equipment and storage medium |
| CN111913182A (en) * | 2020-06-22 | 2020-11-10 | 国网江苏省电力有限公司检修分公司 | Transformer substation operation inspection robot and live area isolation method thereof |
| CN112991675A (en) * | 2020-12-10 | 2021-06-18 | 国网浙江省电力有限公司杭州供电公司 | Monitoring system and monitoring method for operation range of electric power overhaul site |
| CN113820716A (en) * | 2021-07-28 | 2021-12-21 | 国网福建省电力有限公司检修分公司 | Method and device for monitoring safety distance between live equipment in real time |
| CN113917242A (en) * | 2021-09-28 | 2022-01-11 | 华中科技大学 | Conductor corona discharge electric field non-intervention measurement system and application thereof |
-
2022
- 2022-10-18 CN CN202211270082.2A patent/CN115343542B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101696990A (en) * | 2009-10-20 | 2010-04-21 | 重庆大学 | Method for testing electricity of ultrahigh-voltage transmission line based on electric field measurement and system thereof |
| CN103412198A (en) * | 2013-07-22 | 2013-11-27 | 中国人民解放军92537部队 | Measuring device and measuring method of three-dimensional space distribution characteristic of ship protective electric field |
| CN203552555U (en) * | 2013-11-11 | 2014-04-16 | 黄河科技学院 | Experiment device for plotting electrostatic field with simulation method |
| US20170067951A1 (en) * | 2015-09-08 | 2017-03-09 | Cpg Technologies, Llc | Field Strength Monitoring for Optimal Performance |
| CN105448035A (en) * | 2015-12-28 | 2016-03-30 | 云南电网有限责任公司电力科学研究院 | High-voltage line proximity early warning method and device |
| JP2017187376A (en) * | 2016-04-05 | 2017-10-12 | 国立研究開発法人情報通信研究機構 | Electric field detection output device |
| US20180246155A1 (en) * | 2016-07-01 | 2018-08-30 | U.S.A. As Represented By The Administrator Of The National Aeronautics And Space Administration | Dynamic Multidimensional Electric Potential and Electric Field Quantitative Measurement System and Method |
| CN107679321A (en) * | 2017-09-29 | 2018-02-09 | 重庆大学 | The calculating of a kind of high voltage ac/dc and circuit complex electrical field and optimization method |
| CN109633375A (en) * | 2018-12-21 | 2019-04-16 | 云南电网有限责任公司电力科学研究院 | A kind of power distribution network safe distance recognition methods and device |
| CN110988499A (en) * | 2019-10-21 | 2020-04-10 | 武汉大学 | Antenna radiation characteristic obtaining method based on phase-free near field measurement |
| CN111192432A (en) * | 2019-11-20 | 2020-05-22 | 中国电力科学研究院有限公司 | Working bucket safety distance monitoring method and device, working bucket and insulating bucket arm vehicle |
| CN111207787A (en) * | 2019-12-30 | 2020-05-29 | 国网河南省电力公司郑州供电公司 | High-voltage transmission line construction distance early warning device and method thereof |
| CN111650446A (en) * | 2020-06-05 | 2020-09-11 | 南方电网数字电网研究院有限公司 | Power parameter measuring method, system, device, computer equipment and storage medium |
| CN111913182A (en) * | 2020-06-22 | 2020-11-10 | 国网江苏省电力有限公司检修分公司 | Transformer substation operation inspection robot and live area isolation method thereof |
| CN112991675A (en) * | 2020-12-10 | 2021-06-18 | 国网浙江省电力有限公司杭州供电公司 | Monitoring system and monitoring method for operation range of electric power overhaul site |
| CN113820716A (en) * | 2021-07-28 | 2021-12-21 | 国网福建省电力有限公司检修分公司 | Method and device for monitoring safety distance between live equipment in real time |
| CN113917242A (en) * | 2021-09-28 | 2022-01-11 | 华中科技大学 | Conductor corona discharge electric field non-intervention measurement system and application thereof |
Non-Patent Citations (3)
| Title |
|---|
| M. BERNIER 等: "Simultaneous microwave electric field and temperature measurement using pigtailed electro-optic probes", 《MIKON 2008 - 17TH INTERNATIONAL CONFERENCE ON MICROWAVES, RADAR AND WIRELESS COMMUNICATIONS》 * |
| PENG WANG等: "A practical on-line electro-optic measurement equipment for the measurement of electric field and space charge distribution in an electrode geometry with nonuniform electric field distribution", 《2009 IEEE INTERNATIONAL CONFERENCE ON PLASMA SCIENCE - ABSTRACTS》 * |
| 赵欢等: "电力线路附近施工安全距离报警阈值的设定", 《水电能源科学》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116256742A (en) * | 2023-05-15 | 2023-06-13 | 国网天津市电力公司滨海供电分公司 | Live working safety distance monitoring method and device |
| CN116256742B (en) * | 2023-05-15 | 2023-08-01 | 国网天津市电力公司滨海供电分公司 | Live working safety distance monitoring method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115343542B (en) | 2023-04-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Rahmatian et al. | 230 kV optical voltage transducers using multiple electric field sensors | |
| CN115343542B (en) | Method, device, equipment and medium for marking safe operation range of operator | |
| EP2620740B1 (en) | Separation distance determination system and thickness gauge | |
| CN107607798B (en) | Electric shock risk monitoring method and wearable device | |
| Taniguchi et al. | Observation results of lightning shielding for large-scale transmission lines | |
| CN107884631B (en) | Method and system for measuring power frequency electric field intensity | |
| CN103245926A (en) | Efficient simulation device for partial discharge modes under various faults in high-voltage switch cabinet | |
| CN113311214B (en) | Non-contact AC/DC suspension conductor potential measurement system and method | |
| Hussain et al. | Hybrid sensing of internal and surface partial discharges in air-insulated medium voltage switchgear | |
| Nagi et al. | Analysis of the spectrum of electromagnetic radiation generated by electrical discharges | |
| Golenishchev-Kutuzov et al. | Integrated noncontact diagnostics of the operable condition of high-voltage insulators | |
| Gryb et al. | Acoustic diagnostics for determining the appearance of corona discharge | |
| CN114023046A (en) | High-voltage electric shock prevention early warning method based on high-voltage electric shock prevention early warning bracelet | |
| JP7455009B2 (en) | Measuring device, measuring method and program | |
| Abomailek et al. | Feasibility analysis of reduced‐scale visual corona tests in high‐voltage laboratories | |
| CN112067908A (en) | Fitting method and system for distortion electric field when transformer substation robot measures power frequency electric field | |
| Decner et al. | Methods of diagnosing the insulation of electric machines windings | |
| Burkhardt et al. | An innovative method for voltage detection in overhead line systems | |
| Jannah et al. | Design, implementation, and testing of partial discharge signal pattern recognition and judgment system application using statistical method | |
| Yi et al. | Time‐domain virtual EMI receiver model algorithm for corona‐originated electromagnetic interference of dc transmission line | |
| Devarajan et al. | Design of an HV capacitor using the inherent advantage of charge simulation method and experimentations | |
| Bracken et al. | Evaluating occupational 60-hertz electric-field exposures for guideline compliance | |
| RU165276U1 (en) | STAND FOR MODELING AC VARIABLE ELECTROMAGNETIC FIELD IN LAYERED CONDUCTIVE MEDIA | |
| Yongxiang et al. | Gas-insulated switchgear (GIS) equipment mechanical fault detection based on feature learning of vibration signal images | |
| Fauzan et al. | Simulation of Electromagnetic Wave and Surface Current Caused by PD for Seeking Better Detection Sensitivity by TEV Sensor Attached with a Bucket |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |