CN212989584U - Motor cluster electromagnetic wave remote detection device based on SDR technology - Google Patents
Motor cluster electromagnetic wave remote detection device based on SDR technology Download PDFInfo
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- CN212989584U CN212989584U CN202021134526.6U CN202021134526U CN212989584U CN 212989584 U CN212989584 U CN 212989584U CN 202021134526 U CN202021134526 U CN 202021134526U CN 212989584 U CN212989584 U CN 212989584U
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Abstract
The utility model discloses a motor cluster electromagnetic wave remote detection device based on SDR technique, its detection antenna include omnidirectional standing wave antenna, omnidirectional white noise measurement antenna, yagi directional aerial and directional aerial receiver, omnidirectional standing wave antenna and omnidirectional white noise measurement antenna are towards the motor array, yagi directional aerial and affiliated directional aerial receiver are towards the specific direction of motor array and can carry out angle modulation in the motor array within range; the omnidirectional standing wave antenna, the omnidirectional white noise measuring antenna, the yagi directional antenna and the directional antenna receiver are respectively connected with the signal coupler through coaxial cables, and the signal coupler, the filter amplifier, the software defined radio receiver and the background processing terminal are sequentially connected. Utility model gathers the radio wave remote sensing signal that the motor leaked in the operation, carries out artificial intelligence's data analysis and compares to realize the whole remote detection of single system of many motor clusters, need not every motor and arrange all kinds of sensors, singlechip and signal transmitter.
Description
Technical Field
The utility model relates to a motor cluster electromagnetic wave remote detection device based on SDR technique for motor detection area.
Background
At present, the remote operation and maintenance of the motor becomes the mainstream technology of the intelligent motor, the motor can detect the operation data in real time, the operation data is sent to computers or mobile phones of users and maintenance personnel through a cloud, a certain alarming and early warning effect can be achieved, and the added value of service is improved.
The commonly used motor remote operation and maintenance technologies mainly comprise 2 types, respectively:
1. the actual measurement type adopts and arranges measuring transducer such as multiple voltage, electric current, temperature and vibration on the motor, gathers the running signal of motor in real time, and the chip in the box is gathered to the rethread carries out analog-to-digital conversion and data processing, utilizes communication means such as 4G, WiFi and bluetooth to upload the high in the clouds, and the degree of accuracy of system is higher, the real-time is good, but the system is complicated, with high costs, and in inserting the motor body return circuit, produces unpredictable influence to motor life-span.
2. The algorithm type is characterized in that low-performance temperature, magnetism, vibration and other edge sensors are integrated in an external acquisition box, the motor abnormality is found through comparing different parameter expressions of the normal state and the fault state of the motor, the accuracy of the system is general, the cost is low, the installation is simple, the battery is required to be independently configured because the motor body loop is not accessed, and a chip with low power consumption and a power-saving control strategy are adopted for not frequently replacing the battery, so that the sampling frequency is low, the real-time performance is poor, and the service life is short.
Along with wisdom motor uses more and more extensively, many motors in same factory or room, even motor cluster also constantly appear, research and development one kind can be under the condition that does not influence motor body return circuit and life-span, carry out remote measurement's technique to motor operating parameter, and make detection accuracy and real-time better, the cost is lower, is technical staff's main objective.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming prior art's not enough, provide a motor cluster electromagnetic wave remote detection device based on SDR technique, can utilize the leakage electromagnetic wave that the motor operation produced to carry out spectral analysis and long-range fortune dimension.
One technical scheme for achieving the above purpose is as follows: a motor cluster electromagnetic wave remote detection device based on SDR technology is used for remotely detecting the operation state of a motor cluster, and is characterized by comprising a detection antenna array, a signal coupler, a pre-filter amplifier, a software defined radio receiver and a background processing terminal;
the detection antenna comprises an omnidirectional standing wave antenna, an omnidirectional white noise measurement antenna, a yagi directional antenna and a directional antenna receiver, wherein the omnidirectional standing wave antenna and the omnidirectional white noise measurement antenna face the motor array, and the yagi directional antenna and the directional antenna receiver face the specific direction of the motor array and can be subjected to angle adjustment within the range of the motor array;
the omnidirectional standing wave antenna, the omnidirectional white noise measuring antenna, the yagi directional antenna and the directional antenna receiver are respectively connected with the signal coupler through coaxial cables, and the signal coupler, the filter amplifier, the software defined radio receiver and the background processing terminal are sequentially connected.
Furthermore, the directional antenna receiver is connected with an arc-shaped electromagnetic wave reflecting plate through a group of antenna insulating supports and is positioned at the focus of the electromagnetic wave reflecting plate.
Further, the omnidirectional standing wave antenna, the omnidirectional white noise measurement antenna, the yagi directional antenna, the directional antenna receiver, the signal coupler, the filter amplifier, and the software defined radio receiver are integrally disposed on a mobile cart disposed at the center of the motor array.
The utility model discloses a motor cluster electromagnetic wave remote detection device based on SDR technique, the leakage electromagnetic wave that utilizes the motor operation to produce carries out spectral analysis and long-range fortune dimension, avoided installing the detection components and parts in motor structure internally mounted and motor body return circuit, the integrality and the reliability of motor structure have been ensured, electromagnetic wave spectral analysis is reliable and stable simultaneously, combine trouble spectrum database and expert diagnostic system, can realize intelligent detection and early warning to motor fault, wide application prospect has in intelligence fortune dimension field.
Drawings
Fig. 1 is a schematic structural diagram of a motor cluster electromagnetic wave remote detection device based on the SDR technology of the present invention;
fig. 2 is a schematic top view of the SDR technology based remote detection device for electromagnetic waves of a motor cluster arranged in the center of a motor array of the present invention;
fig. 3 is the utility model discloses a motor cluster electromagnetic wave remote detection device integration is at moving platform's structural schematic based on SDR technique.
Detailed Description
In order to better understand the technical solution of the present invention, the following detailed description is made by specific embodiments:
please refer to fig. 1, the utility model discloses a motor cluster electromagnetic wave remote detection device based on SDR technique for carry out remote detection to the operation state of motor cluster, 6 array settings of motor cluster. The specific structure of the detection device comprises a detection antenna array, a signal coupler 12, a pre-filter amplifier 11, a software defined radio receiver (SDR)10 and a background processing terminal 9.
The detection antenna comprises an omnidirectional standing wave antenna 1, an omnidirectional white noise measurement antenna 2, a yagi directional antenna 4 and a directional antenna receiver 8. The omnidirectional white noise measuring antenna 2 is used for measuring basic electromagnetic wave signals of the motor in a non-starting or stable state, and provides a basic reference threshold value for subsequent spectrum analysis. The omnidirectional standing wave antenna 1 can detect the frequency and amplitude of the overall electromagnetic wave signal of the motor cluster, and can roughly find abnormal signals according to the power density and distribution of the electromagnetic wave. The yagi directional antenna 4 and the directional antenna receiver 8 can scan within the range of the motor array to find an abnormal motor. The directional antenna receiver 8 is connected with an arc-shaped electromagnetic wave reflecting plate 3 through a group of antenna insulating supports 7 and is positioned at the focus of the electromagnetic wave reflecting plate 3, and the electromagnetic wave reflecting plate 3 can improve the sensitivity and the accuracy of the directional antenna receiver 8.
The omnidirectional standing wave antenna 1, the omnidirectional white noise measuring antenna 2, the yagi directional antenna 4 and the directional antenna receiver 8 are respectively connected with a signal coupler 12 through a coaxial cable 13. The signal coupler 12, the filter amplifier 11, the software defined radio receiver 10 and the background processing terminal 9 are connected in sequence. The background processing terminal can be a PC, a tablet computer or a smart phone.
Referring to fig. 2, in practical use, the SDR technology based motor cluster 6 electromagnetic wave remote detection device may be arranged in the center of the motor array according to the test layout. It should be noted that the antenna sweep plane is prevented from being overlapped with the plane of the motor, and the motor close to the system is prevented from blocking electromagnetic wave signals of the motor far away, so that a situation similar to a "flying sun effect" is generated, and the global coverage capability of the system is enhanced.
Referring to fig. 3, a typical embodiment of a motor cluster electromagnetic wave remote detection device based on the SDR technology is disclosed, in which an omnidirectional standing wave antenna 1, an omnidirectional white noise measurement antenna 2, a yagi directional antenna 4, a directional antenna receiver 8, a signal coupler 12, a filter amplifier 11, and a software defined radio receiver are integrally disposed on a mobile platform body 14, so as to facilitate the device configuration.
It has the following structural characteristics:
1. the axis of the yagi directional antenna 4 is strictly parallel to the axis of the electromagnetic wave reflecting plate 3, a laser positioning device 5 is additionally arranged on the yagi directional antenna 4, the laser emitting direction of the laser positioning device is also strictly parallel to the axis of the electromagnetic wave reflecting plate 3, so that an accurate aiming system of the directional antenna array is formed, the antenna insulating support 7 adopts a single-arm cantilever beam mechanism and is positioned right above the electromagnetic wave reflecting plate 3, and because the motors are generally installed relatively low, the structure can prevent the antenna insulating support from appearing in a sweep angle theta, and avoids signal attenuation and distortion caused by shielding of electromagnetic wave signals of the motors.
2. The horizontal axis of rotation 17 of equatorial telescope and the axis of rotation 18 of equatorial telescope every single move have been increased to electromagnetic wave reflecting plate 3 rear portion, adopt electric drive, can realize the controllable rotation on level and the two degrees of freedom of every single move, and the structure similar to the cloud platform can realize 6 automatic periodic radar scans of motor cluster and the accurate scanning of the pursuit of paying attention to the motor.
3. The whole detection system is installed on the moving platform body 14, convenient hand-push type moving can be achieved through combination of the two universal wheels and the two common wheels, the electric moving platform, the rail moving platform or the AGV autonomous moving trolley and the like can be replaced under the condition, and inspection among different angles or different plants is achieved.
4. Because the detection system needs a good antenna receiving height, the whole gravity center is higher, and an anti-toppling balancing weight 19 is arranged.
5. The antenna insulation support 7, the antenna base 15, the antenna support 16 and other supports are made of insulation materials, so that common-mode interference of the antenna is prevented.
The utility model discloses can use subaerial removal, also can install on the roof or bury underground etc. and the detection object can be the equipment or the device of transmission electromagnetic wave beyond the motor, adopt similar SDR's radio spectrum receiving arrangement do like FPGA, STM32 single chip microcomputer system etc. this system still can use its extended frequency range (30MHz-1.7GHz), use at shortwave, very high frequency and microwave section, produce certain positive effect to distant range directional communication and civilian level astronomical radio.
The utility model discloses the leading principle is based on SDR software definition radio technology, through the antenna array of rational design, gathers the radio wave remote sensing signal that the motor leaks in the operation, carries out artificial intelligence's data analysis and compares to realize the whole remote detection of single system of many motor clusters, need not every motor and arrange all kinds of sensors, singlechip and signal transmitter.
In the operation process of the motor cluster, due to the fact that electromagnetic wave radiation can be generated by the contact condition of electric brushes, exciting coils of variable-frequency and power-frequency power supplies, air gap electromagnetic vibration of a stator and a rotor and the like, although an outer cover is grounded and shielded, a small part of electromagnetic waves can leak outwards, the industrial EMC standard and EN60034-1 stipulate the radiation limit of the frequency range of 30MHz-1GHz, and 20Hz-20KHz is an aural noise area, so that the two parts of frequency spectrums are examined before the motor leaves a factory, a infrasonic wave area is below 20Hz, the frequency difference between the infrasonic wave area and the motor rotation frequency is not considered, and the 20KHz-30MHz frequency is not examined, so that the frequency range is the object frequency range mainly detected by the method.
The method for remotely detecting the motor cluster electromagnetic wave remote detection device based on the SDR technology comprises the steps that a detection antenna array receives frequency change of electromagnetic waves sent by a motor, the signals are transmitted to a signal coupler through a coaxial cable without distortion, a time domain signal curve of 0Hz-50MHz full frequency band is fitted, signals outside 20KHz-30MHz frequency are filtered through a pre-filter amplifier, signals within 20KHz-30MHz frequency are amplified by 30-50db, then the signals enter a software defined radio receiver for analog-to-digital conversion, then the signals enter a background processing terminal for fast Fourier change FFT of the time domain signals, a frequency spectrum diagram of abnormal signals of the motor is generated, the frequency distribution and corresponding amplitude parameters of the abnormal signals can be found by making difference values on each frequency between the frequency spectrum diagram and white noise measured by an omnidirectional white noise measuring antenna, and (5) finding the motor abnormality.
Before the motor is remotely detected by using the method, multiple comparison measurements are carried out firstly, a spectrogram of a corresponding fault is obtained by artificially generating a common motor fault and is stored in a database for classification storage, an expert comparison diagnosis system is formed, then the field motor is detected, the spectrogram obtained by monitoring is automatically matched and screened with the expert system, a self-diagnosis report is intelligently generated, the fault alarm and early warning of the motor are carried out on users and service personnel, and the feedback adjustment of the motor operation parameters is carried out on the motor system with a DCS system.
The detection system is used for scanning the full frequency, the software is rtl pan, and the frequency spectrum is obtained by scanning according to the frequency of 20KHz-30 MHz. The system is proved to be used for detecting the electromagnetic parameters of the alternating current motor by utilizing equipment such as a test motor to carry out simulation test and finding the motor spectral line near 580 KHz. The direct current motor and the variable frequency motor can also be used in experiments, the frequency of the direct current motor and the variable frequency motor can be both 0-1.7GHz, and due to the structure and the response characteristic, the electromagnetic wave radiation of the latter has more obvious characteristics, so that a fault corresponding map is more easily formed.
It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (3)
1. A motor cluster electromagnetic wave remote detection device based on SDR technology is used for remotely detecting the operation state of a motor cluster, and is characterized by comprising a detection antenna array, a signal coupler, a pre-filter amplifier, a software defined radio receiver and a background processing terminal;
the detection antenna comprises an omnidirectional standing wave antenna, an omnidirectional white noise measurement antenna, a yagi directional antenna and a directional antenna receiver, wherein the omnidirectional standing wave antenna and the omnidirectional white noise measurement antenna face the motor array, and the yagi directional antenna and the directional antenna receiver face the specific direction of the motor array and can be subjected to angle adjustment within the range of the motor array;
the omnidirectional standing wave antenna, the omnidirectional white noise measuring antenna, the yagi directional antenna and the directional antenna receiver are respectively connected with the signal coupler through coaxial cables, and the signal coupler, the filter amplifier, the software defined radio receiver and the background processing terminal are sequentially connected.
2. The device for remotely detecting the electromagnetic waves of the motor cluster based on the SDR technology as claimed in claim 1, wherein the directional antenna receiver is connected with an arc-shaped electromagnetic wave reflecting plate through a group of antenna insulating supports and is positioned at the focus of the electromagnetic wave reflecting plate.
3. The device of claim 1, wherein the omnidirectional standing wave antenna, the omnidirectional white noise measurement antenna, the yagi directional antenna, the directional antenna receiver, the signal coupler, the filter amplifier, and the software defined radio receiver are integrally disposed on a mobile cart disposed at the center of the motor array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021134526.6U CN212989584U (en) | 2020-06-18 | 2020-06-18 | Motor cluster electromagnetic wave remote detection device based on SDR technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021134526.6U CN212989584U (en) | 2020-06-18 | 2020-06-18 | Motor cluster electromagnetic wave remote detection device based on SDR technology |
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| Publication Number | Publication Date |
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| CN212989584U true CN212989584U (en) | 2021-04-16 |
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| CN202021134526.6U Active CN212989584U (en) | 2020-06-18 | 2020-06-18 | Motor cluster electromagnetic wave remote detection device based on SDR technology |
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