CN115372717A - Distributed electromagnetic field detection method and device - Google Patents
Distributed electromagnetic field detection method and device Download PDFInfo
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- CN115372717A CN115372717A CN202210411919.4A CN202210411919A CN115372717A CN 115372717 A CN115372717 A CN 115372717A CN 202210411919 A CN202210411919 A CN 202210411919A CN 115372717 A CN115372717 A CN 115372717A
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- 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
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0892—Details related to signal analysis or treatment; presenting results, e.g. displays; measuring specific signal features other than field strength, e.g. polarisation, field modes, phase, envelope, maximum value
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
- H04W64/006—Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a distributed electromagnetic field detection method, which belongs to the field of electromagnetism, and is characterized in that a plurality of field intensity detection nodes are arranged on a detection environment or equipment to be detected, and the distributed field intensity detection nodes and calibration nodes are utilized to realize real-time monitoring on the environment electromagnetic pollution condition of a key area, so as to construct an electromagnetic pollution early warning system. The invention can also be applied to the electromagnetic field distributed detection of the inner and outer adjacent spaces of large-scale equipment, such as automobiles, airplanes, automatic production lines and other equipment systems, and realizes the analysis and construction of the field intensity distribution characteristics of the near-field electromagnetic field of the large-scale electrical equipment system. The invention also relates to a distributed electromagnetic field detection device for implementing the distributed electromagnetic field detection method.
Description
Technical Field
The invention relates to the technical field of electromagnetism, in particular to a distributed electromagnetic field detection method and device.
Background
With the development of science and technology, more and more electromagnetic radiation facilities enter various fields of human life and production, such as: communication base stations, high-voltage transmission and transformation stations, various electronic devices and the like. The electromagnetic pollution of the daily environment becomes more serious, and potential risks are brought to the normal operation of equipment and the life health of people. Electromagnetic fields are invisible and are not easy to perceive, and professional equipment and technical methods are urgently needed to realize real-time monitoring and early warning of electromagnetic pollution conditions in key areas. In addition, complex electrical equipment systems such as new energy automobiles, large passenger planes, high-speed rail trains and automatic production lines are composed of numerous active electronic and electrical equipment and cables and are in close contact with users, so that main interference sources in the systems can be further found through detection and analysis of near-field electromagnetic field distribution of the complex electrical equipment systems, electromagnetic compatibility reliability among all parts of the equipment is improved, and electromagnetic radiation safety analysis and evaluation of users of the equipment systems are realized based on detection results of the near-field intensity of the equipment.
The technical scheme of the distributed electromagnetic field detection system which can be used in the scene at present is not complete, and the main defect is that 1, a fixed detection base station is arranged, the position information of the detection base station is predetermined, dynamic positioning cannot be realized, and flexibility is lacked; 2. the detection node has a complicated structure, and cannot be sufficiently miniaturized, portable and low in power consumption.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a distributed electromagnetic field detection method which is used for dynamically and automatically positioning a detection node, is more flexible and convenient to install and does not need other tools to calibrate the position of the node.
In order to overcome the defects of the prior art, the invention also aims to provide a distributed electromagnetic field detection device which can dynamically and automatically position a detection node, is more flexible and convenient to install and does not need other tools to calibrate the position of the node.
One of the purposes of the invention is realized by adopting the following technical scheme:
a distributed electromagnetic field detection method, comprising the steps of:
s1, installing a plurality of field intensity detection nodes on a detection environment or equipment to be detected;
s2, arranging a positioning auxiliary mechanism, installing a calibration node on the positioning auxiliary mechanism, and defining a reference coordinate system;
s3, the centralized control unit inputs the position coordinate information of the calibration node and the identification information of all field intensity detection nodes;
s4, the centralized control unit sends synchronous time information to ensure the time synchronization of all the field intensity detection nodes and the centralized control unit;
s5, the centralized control unit sends a positioning starting instruction, and after all the nodes are positioned, the position information is fed back to the centralized control unit;
s6, the centralized control unit constructs a space position structure model of the sensor network formed by the detection nodes;
s7, the centralized control unit sends frequency band and resolution information of electromagnetic field intensity detection and initializes detection parameters of the detection nodes;
s8, the detection node transmits the detection field intensity information to the centralized control unit through the calibration node;
and S9, the centralized control unit corresponds the field intensity information, the time information and the node position information to obtain the field intensity distribution condition of the detected area.
Further, in step S1, there is a space between the plurality of field strength detection nodes, and a single node cannot be completely shielded.
Further, in step S2, the scaling assisting mechanism is expanded into a square shape and placed near the sensor network formed by the detection nodes, so that the connection lines between the vertexes of the scaling assisting mechanism and the plurality of detection nodes are not blocked.
Further, in step S2, a sensor network calibration node device is installed at a vertex of the square, a cartesian coordinate system is constructed with one of the calibration nodes as an origin of coordinates, edges of the square passing through the origin of coordinates as an X axis and a Y axis, and a direction perpendicular to the auxiliary calibration device as a Z axis, the coordinate system is used for determining position information of the detection node, and after the coordinate system is determined, position coordinates of the calibration node on the calibration auxiliary mechanism can be determined.
Further, in step S5, after positioning is completed, all nodes feed back position information to the centralized control unit, specifically, after receiving the position request instruction, the calibration node feeds back position information to the corresponding detection node, and starts a ranging process based on the DTOA technology to obtain distance information between the detection node and the calibration node, when the node to be positioned obtains distance information and position information of more than 3 calibration nodes, position coordinates under a system-defined coordinate system are obtained through maximum likelihood estimation, the detection node which obtains the position coordinates can respond to position request information of other nodes to determine the position coordinates of all detection nodes in a recursive manner, and after positioning of the detection nodes is completed, the position information is fed back to the centralized control unit.
The second purpose of the invention is realized by adopting the following technical scheme:
a distributed electromagnetic field detection device is used for implementing any one of the distributed electromagnetic field detection methods, and comprises a plurality of field intensity detection nodes, calibration nodes, a positioning auxiliary mechanism and a centralized control unit, wherein the field intensity detection nodes are installed on a detection environment or equipment to be detected so as to realize the detection and positioning of node position information, the calibration nodes are installed on the positioning auxiliary mechanism so as to obtain the accurate position information of the field intensity detection nodes under a specific coordinate system, and the centralized control unit receives the detection data and the positioning information of the field intensity detection nodes and constructs an electromagnetic field intensity spatial distribution model with different frequency points.
Further, each field intensity detection node includes antenna group, radio frequency sampling module, miniature control module and UWB communication orientation module, the radio frequency signal in the antenna group receiving space is transmitted for the radio frequency sampling module, the radio frequency sampling module is according to specific sampling rate and the radio frequency signal and the transmission of medium frequency bandwidth collection specific frequency channel the miniature control module, the miniature control module carries out computational analysis to radio frequency sampling data and obtains the radio frequency intensity information of corresponding frequency point to transmit radio frequency intensity information for UWB communication orientation module.
Furthermore, the calibration node comprises a UWB communication positioning module, and the UWB communication positioning module obtains the position information of the calibration node, so as to further calculate the position information of the field intensity detection node in the same coordinate system.
Furthermore, the centralized control unit comprises a UWB communication module and a calculation and analysis module, the UWB communication module can send instructions or initialization information to the field intensity detection nodes and the calibration nodes, receive detection data and positioning information of each detection node, and the calculation and analysis module carries out calculation and analysis according to the positioning information of the nodes and the detection result of the electromagnetic field intensity to construct electromagnetic field intensity spatial distribution models with different frequency points.
Furthermore, the positioning auxiliary mechanism comprises four connecting rods and a positioning rod, the four connecting rods are equal in length and are connected end to form a foldable structure, two ends of the positioning rod are mounted on the two adjacent connecting rods, so that the four connecting rods are positioned to form a square structure, and the calibration nodes are mounted at fixed points of the square.
Compared with the prior art, the distributed electromagnetic field detection method can realize dynamic automatic positioning of the detection node, is more flexible and convenient to install the field intensity detection node, and does not need other tools to calibrate the position of the node; the invention is based on the integrated sampling and communication positioning chip, thereby realizing the miniaturization and low power consumption of the node device; the invention designs a portable node position calibration device and a portable node position calibration mechanism, and can conveniently construct a space reference coordinate system established based on calibration nodes under the environment without position reference, so as to realize the accurate positioning of detection nodes under the coordinate system.
Drawings
FIG. 1 is a flow chart of a distributed electromagnetic field detection method of the present invention;
FIG. 2 is a schematic diagram of a node for detecting field intensity of the distributed electromagnetic field detection apparatus according to the present invention;
FIG. 3 is a schematic diagram of a calibration node of the distributed electromagnetic field detection apparatus according to the present invention;
FIG. 4 is a schematic diagram of a centralized control unit of the distributed electromagnetic field detection apparatus of the present invention.
Detailed Description
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.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present, secured by intervening elements. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Fig. 1 is a flow chart of a distributed electromagnetic field detection method of the present invention, the distributed electromagnetic field detection method comprising the steps of:
s1, installing a plurality of field intensity detection nodes on a detection environment or equipment to be detected;
s2, arranging a positioning auxiliary mechanism, installing a calibration node on the positioning auxiliary mechanism, and defining a reference coordinate system;
s3, the centralized control unit inputs the position coordinate information of the calibration node and the identification information of all field intensity detection nodes;
s4, the centralized control unit sends synchronous time information to ensure the time synchronization of all the field intensity detection nodes and the centralized control unit;
s5, the centralized control unit sends a positioning starting instruction, and after all the nodes are positioned, the position information is fed back to the centralized control unit;
s6, the centralized control unit constructs a space position structure model of the sensor network formed by the detection nodes;
s7, the centralized control unit sends frequency band and resolution information of electromagnetic field intensity to be detected and initializes the detection parameters of the detection nodes;
s8, the detection node transmits the detection field intensity information to the centralized control unit through the calibration node;
and S9, the centralized control unit corresponds the field intensity information, the time information and the node position information to obtain the field intensity distribution condition of the detected area.
Specifically, in step S1, the number of field intensity detection nodes is several tens to several hundreds, there is a space between a plurality of field intensity detection nodes, and a single node cannot be completely shielded. In step S2, the calibration assisting mechanism is expanded into a square and placed near the sensor network formed by the detection nodes, so that the connection lines between the vertex of the calibration assisting mechanism and the plurality of detection nodes are not blocked. In the step S2, a sensor network calibration node device is installed at the vertex of the square, one of the calibration nodes is used as a coordinate origin, the edge of the square passing through the coordinate origin is used as an X axis and a Y axis, the direction perpendicular to the auxiliary calibration device is used as a Z axis, a Cartesian coordinate system is constructed, the coordinate system is used for determining the position information of the detection node, and after the coordinate system is determined, the position coordinates of the calibration nodes on the calibration auxiliary mechanism can be determined. In step S5, after all the nodes finish positioning, feeding back the position information to the centralized control unit, specifically, after the calibration node receives the position request instruction, feeding back the position information to the corresponding detection node, starting a distance measurement process based on the DTOA technology to obtain the distance information of the detection node and the calibration node, when the node to be positioned obtains the distance information and the position information of more than 3 calibration nodes, obtaining the position coordinates under a system defined coordinate system through maximum likelihood estimation, and the detection node which obtains the position coordinates can respond to the position request information of other nodes to recursively finish the determination of the position coordinates of all the detection nodes, and after the positioning of the detection nodes is finished, feeding back the position information to the centralized control unit.
The invention also relates to a distributed electromagnetic field detection device which comprises a plurality of field intensity detection nodes, a calibration node, a positioning auxiliary mechanism and a centralized control unit.
With reference to fig. 2, each field intensity detection node includes an antenna group, a radio frequency sampling module, a micro control module, a UWB communication positioning module, and a power module. The antenna group is a small antenna group, and the antenna group is used for receiving radio frequency signals in space and transmitting the radio frequency signals to corresponding radio frequency input ports in the radio frequency sampling module. The radio frequency sampling module can acquire radio frequency signals of a specific frequency band according to a control instruction of the micro control module and a specific sampling rate and a medium frequency bandwidth, and converts the radio frequency signals into digital signals of a specific communication protocol format and transmits the digital signals to the micro control module. The micro control module calculates and analyzes the radio frequency sampling data to obtain the radio frequency intensity information of the corresponding frequency point, and transmits the corresponding data to the UWB communication positioning module through a USB3.0 and other high-speed communication interfaces. The UWB communication positioning module realizes the transmission of radio frequency field intensity information through UWB wireless communication with the centralized control unit. The UWB communication positioning module receives the control instruction of the centralized control unit at the same time and transmits the related information to the WeChat controller for analysis and processing. The UWB communication positioning module of the single field intensity detection node device can also communicate with other UWB communication positioning modules or sensor network calibration node devices of field intensity detection node devices with known position information, so that the detection and positioning of the node position information are realized. The power module consists of a lithium battery pack, a charging circuit and a voltage conversion circuit and provides long-time electric energy supply for the whole node device.
Referring to fig. 3, the calibration node is configured to remove the antenna group, the radio frequency sampling module, and the micro control module, and only remain the UWB communication positioning module and the power module, with respect to the field intensity detection node. Thereby further realizing miniaturization and low power consumption of the scaling node. The sensor network calibration nodes are installed on the calibration auxiliary mechanism so as to obtain accurate position information under a specific coordinate system. And the position information relative to the calibration node is obtained by the detection node through the UWB technology, so that the position information of the detection node in the same coordinate system is further calculated.
The scaling auxiliary mechanism is composed of four connecting rods which are equal in length and are connected end to end, and can be folded and retracted. When the connecting rod unfolding device is used, the connecting rod unfolding device can be unfolded to be square, the included angle of the two connecting rods is determined by the short rod which is bridged on the two connecting rods and has a specific length, and the inserting pins at the two ends of the short rod are inserted into the mounting holes of the connecting rods, so that the two rods can be unfolded to be square. The scaling nodes are mounted at the vertices of the square. Typically 3-4 scaling node devices are installed. And taking one of the calibration nodes as an origin, taking the square edge of the auxiliary mechanism as X and Y axes of a positioning coordinate system, and constructing a corresponding Cartesian coordinate system with the Z axis vertical to the square plane upward. So that the position coordinates of the calibration nodes installed at other vertexes of the auxiliary mechanism can be determined.
With continued reference to fig. 4, the centralized control unit is composed of a UWB communication module, a data storage module, a calculation and analysis module, a remote communication module, and a display module. The UWB communication module can carry out short-distance wireless communication with the detection nodes and the calibration nodes, sends instructions or initialization information to the related nodes, and receives detection data and positioning information of each detection node. And the data storage module stores information such as detection data uploaded by each node. And the calculation analysis module is used for controlling the working state of the nodes, performing calculation analysis according to the positioning information of the nodes and the detection result of the electromagnetic field intensity, and constructing electromagnetic field intensity spatial distribution models of different frequency points. The remote communication module can realize remote communication and management of the centralized control unit.
When the distributed electromagnetic field detection device is used, a plurality of field intensity detection node devices are installed in an environment or equipment to be detected, and only the node distance needs to be reasonably arranged and a single node is guaranteed not to be completely shielded. And unfolding the calibration auxiliary mechanism into a square, and placing the calibration auxiliary mechanism at a proper position near a sensor network formed by the detection nodes, so that the connection lines between the vertexes of the calibration auxiliary mechanism and more detection nodes are not shielded. The targeting aid is typically placed on the ground. And installing a sensor network calibration node device at the vertex of the square, taking one of the calibration nodes as the origin of coordinates, taking the square edge passing through the origin of coordinates as an X axis and a Y axis, and taking the direction vertical to the auxiliary calibration device as a Z axis to construct a Cartesian coordinate system. The coordinate system is used to determine location information of the detection nodes. After the coordinate system is determined, the position coordinates of the calibration nodes on the calibration auxiliary mechanism can be determined. The centralized control unit is placed in close proximity beside the scaling node. Firstly, the numbers of the used calibration nodes and detection node devices are recorded in the centralized control unit, and the position information of the corresponding calibration nodes under the user-defined Cartesian coordinate system is recorded. Thus the location information of 3-4 nodes in the system is known. The centralized control unit sends time synchronization information to each node, so that time synchronization of the nodes in the system and the centralized control unit is ensured, and a uniform time scale is provided for field intensity detection and intensity distribution reconstruction. The centralized control unit sends a positioning starting instruction. The detection node broadcasts a position information request instruction, the calibration node feeds back position information to the corresponding detection node after receiving the position request instruction, and starts a distance measurement process based on the DTOA technology to obtain distance information of the detection node and the calibration node. When the node to be positioned obtains the distance information and the position information of more than 3 calibration nodes, the position coordinate under the system defined coordinate system can be obtained through maximum likelihood estimation. The detecting node that obtains the position coordinates may respond to the position request information of other nodes. And determining the position coordinates of all the detection nodes by recursion. And after the detection node is positioned, the position information is fed back to the centralized control unit. The centralized control unit can construct a spatial structure of the sensor network according to the position coordinates of the nodes. After all the nodes are positioned, the centralized control unit sends the radio frequency field intensity range to be detected to the detection nodes, the detection nodes are initialized, and the detection function of the detection nodes is started. The detection nodes transmit the detected data, namely the detection timestamp information to the centralized control unit in real time. The centralized control unit associates the field intensity detection data with the position information, so as to obtain the spatial distribution condition of the radio frequency field intensity in a specific frequency range.
The electromagnetic field monitoring network is formed by field intensity detection nodes which are installed in monitored environments or equipment and are different in number. And describing the distribution condition of the field intensity of the interference electromagnetic field in the coverage area of the monitoring network through the field intensity information measured by each node. The calibration node and the calibration auxiliary mechanism jointly form a position reference for positioning the detection node of the monitoring network. Through a UWB positioning technology and a TDOA positioning algorithm, relative position information of each node relative to a sensor network calibration node device on a calibration auxiliary mechanism is obtained, calibration of spatial position information of each detection point is achieved, and a spatial structure of a monitoring network is constructed. The centralized control unit is used for managing and controlling the field intensity detection node device and the sensor network calibration node device, and realizing accurate node positioning, parameter setting of the detection nodes, communication management of the nodes and the central control, collection, processing, remote transmission and the like of field intensity information.
The invention realizes a distributed electromagnetic field intensity detection network which is composed of low-power-consumption and miniaturized electromagnetic field intensity detection nodes and can dynamically position the positions of the detection nodes through an integrated radio frequency sampling chip and a low-power-consumption UWB communication positioning module, and realizes flexible deployment and rapid detection of various application scenes. High-speed transmission and low interference of detection data in a network are realized through a UWB technology, real-time transmission of wide-screen band detection data is realized, and interference of a communication module on environment field intensity detection is reduced to the maximum extent.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, variations and modifications can be made without departing from the spirit of the invention, and all equivalent modifications and changes can be made to the above embodiments according to the essential technology of the invention, which falls into the protection scope of the invention.
Claims (10)
1. A distributed electromagnetic field detection method, comprising the steps of:
s1, installing a plurality of field intensity detection nodes on a detection environment or equipment to be detected;
s2, arranging a positioning auxiliary mechanism, installing a calibration node on the positioning auxiliary mechanism, and defining a reference coordinate system;
s3, the centralized control unit inputs the position coordinate information of the calibration node and the identification information of all field intensity detection nodes;
s4, the centralized control unit sends synchronous time information to ensure the time synchronization of all the field intensity detection nodes and the centralized control unit;
s5, the centralized control unit sends a positioning starting instruction, and after all the nodes are positioned, the position information is fed back to the centralized control unit;
s6, the centralized control unit constructs a space position structure model of the sensor network formed by the detection nodes;
s7, the centralized control unit sends frequency band and resolution information of electromagnetic field intensity to be detected and initializes the detection parameters of the detection nodes;
s8, the detection node transmits the detection field intensity information to the centralized control unit through the calibration node;
and S9, the centralized control unit corresponds the field intensity information, the time information and the node position information to obtain the field intensity distribution condition of the detected area.
2. A distributed electromagnetic field detection method as defined in claim 1, wherein: in step S1, there is a spacing between the plurality of field strength detection nodes, and a single node cannot be completely obscured.
3. A distributed electromagnetic field detection method as defined in claim 1, wherein: in step S2, the calibration assisting mechanism is expanded into a square and placed near the sensor network formed by the detection nodes, so that the connection lines between the vertex of the calibration assisting mechanism and the plurality of detection nodes are not blocked.
4. A distributed electromagnetic field detection method as defined in claim 3, wherein: in step S2, a sensor network calibration node device is installed at a vertex of the square, a cartesian coordinate system is constructed with one of the calibration nodes as an origin of coordinates, edges of the square passing through the origin of coordinates as an X axis and a Y axis, and a direction perpendicular to the auxiliary calibration device as a Z axis, the coordinate system is used for determining position information of the detection node, and after the coordinate system is determined, position coordinates of the calibration node on the calibration auxiliary mechanism can be determined.
5. A distributed electromagnetic field detection method as claimed in claim 1, characterized in that: in step S5, after all the nodes finish positioning, the position information is fed back to the centralized control unit, specifically, after the calibration node receives the position request instruction, the calibration node feeds back the position information to the corresponding detection node, and starts the distance measurement process based on the DTOA technology to obtain the distance information of the detection node and the calibration node, when the node to be positioned obtains the distance information and the position information of more than 3 calibration nodes, the position coordinate under the system definition coordinate system is obtained through maximum likelihood estimation, the detection node obtaining the position coordinate can respond to the position request information of other nodes, so that the determination of the position coordinates of all the detection nodes is finished by recursion, and after the positioning of the detection nodes is finished, the position information is fed back to the centralized control unit.
6. A distributed electromagnetic field detection apparatus for implementing the distributed electromagnetic field detection method according to any one of claims 1 to 5, characterized in that: distributed electromagnetic field detection device includes a plurality of field intensity detection nodes, calibration node, location complementary unit and centralized control unit, and is a plurality of field intensity detection node installs in detection environment or wait to examine the detection location of waiting to examine equipment in order to realize node positional information, calibration node install in location complementary unit is in order to obtain the accurate positional information of field intensity detection node under the specific coordinate system, centralized control unit receives the detection data and the positional information of each field intensity detection node and constructs the electromagnetic field intensity spatial distribution model of different frequency points.
7. A distributed electromagnetic field detection apparatus as defined in claim 6, wherein: each field intensity detection node includes antenna group, radio frequency sampling module, miniature control module and UWB communication orientation module, the radio frequency signal in the antenna group receiving space is transmitted for radio frequency sampling module, radio frequency sampling module gathers the radio frequency signal of specific frequency channel and transmits according to specific sampling rate and well frequency bandwidth miniature control module, miniature control module carries out computational analysis to radio frequency sampled data and obtains the radio frequency intensity information of corresponding frequency point to transmit radio frequency intensity information for UWB communication orientation module.
8. A distributed electromagnetic field detection apparatus as defined in claim 6, wherein: the calibration node comprises a UWB communication positioning module, and the UWB communication positioning module obtains the position information of the calibration node, so that the position information of the field intensity detection node under the same coordinate system is further calculated.
9. A distributed electromagnetic field detection apparatus as defined in claim 6, wherein: the centralized control unit comprises a UWB communication module and a calculation and analysis module, the UWB communication module can send instructions or initialization information to the field intensity detection nodes and the scaling nodes to receive detection data and positioning information of each detection node, and the calculation and analysis module carries out calculation and analysis according to the positioning information of the nodes and the detection result of the electromagnetic field intensity to construct electromagnetic field intensity space distribution models of different frequency points.
10. A distributed electromagnetic field detection apparatus as defined in claim 6, wherein: the positioning auxiliary mechanism comprises four connecting rods and a positioning rod, the four connecting rods are equal in length and are connected end to form a foldable structure, two ends of the positioning rod are mounted on the two adjacent connecting rods, so that the four connecting rods are positioned to form a square structure, and the calibration nodes are mounted at the fixed points of the square.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117148025A (en) * | 2023-10-31 | 2023-12-01 | 广州计测检测技术股份有限公司 | Automobile complex electromagnetic environment adaptability test method, device, equipment and medium |
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| CN117148025A (en) * | 2023-10-31 | 2023-12-01 | 广州计测检测技术股份有限公司 | Automobile complex electromagnetic environment adaptability test method, device, equipment and medium |
| CN117148025B (en) * | 2023-10-31 | 2024-04-19 | 广州计测检测技术股份有限公司 | Automobile complex electromagnetic environment adaptability test method, device, equipment and medium |
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