CN209764950U - Electromagnetic field measuring probe and electromagnetic field measuring system - Google Patents
Electromagnetic field measuring probe and electromagnetic field measuring system Download PDFInfo
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- CN209764950U CN209764950U CN201920142600.XU CN201920142600U CN209764950U CN 209764950 U CN209764950 U CN 209764950U CN 201920142600 U CN201920142600 U CN 201920142600U CN 209764950 U CN209764950 U CN 209764950U
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Abstract
The application relates to an electromagnetic field measuring probe and an electromagnetic field measuring system. The electromagnetic field measuring probe comprises a shell, a photoelectric conversion device, an energy storage battery and a power circuit. The housing defines a receiving cavity. The photoelectric conversion device is arranged in the accommodating cavity, the shell is provided with a through hole, and the through hole is used for connecting the photoelectric conversion device and the light source. The energy storage battery is arranged in the accommodating cavity. The power circuit is arranged in the accommodating cavity, is respectively electrically connected with the photoelectric conversion device and the energy storage battery, and is used for controlling the photoelectric conversion device to charge the energy storage battery. The electromagnetic field measuring probe is arranged in the accommodating cavity through the photoelectric conversion device, so that the influence of metal parts in the photoelectric conversion device on the measuring electromagnetic field can be avoided, and the continuous power supply of the electromagnetic field measuring probe is realized. Therefore, the electromagnetic field measuring probe solves the problem that the power supply mode in the related art cannot continuously supply power under the influence of completely avoiding external metal.
Description
Technical Field
The present application relates to the field of electromagnetic field measurement technologies, and in particular, to an electromagnetic field measurement probe and an electromagnetic field measurement system.
background
Low (I) frequency electromagnetic fields generally refer to electromagnetic fields having a frequency of 1Hz-100 kHz. According to GB12720-91 power frequency electric field measurement, three types of power frequency electric field probes are a suspension type, a ground reference type and a photoelectric type, and the suspension type electric field probe is technically mature, popularized and applied. The electric field sensor is an isolated conductor without reference to ground potential, the probe of the type uses a built-in battery for power supply, is arranged on an insulating bracket or an insulating handle during measurement, and is connected with a field intensity meter host through an optical fiber.
Due to the limited volume of the probe, the capacity of the built-in battery is limited, and the monitoring cannot be carried out under the external charging state. Even with high performance batteries and low power consumption, measurement times of up to 24 hours are difficult to achieve, and thus long-term continuous monitoring cannot be supported. In order to solve the problems, in a power frequency electromagnetic field online monitoring system, a solar panel is adopted to charge an external battery of a probe, and the battery provides electric energy for a low-frequency electromagnetic field probe. The solar panel and the battery are suspended in the air, and the power supply line connected with the low-frequency electromagnetic field probe is shortened as much as possible. The above scheme has the following problems: firstly, the solar panel, the battery and metal parts contained in the power supply line are externally arranged on the low-frequency electromagnetic field probe, so that the distribution of electric fields around the low-frequency electromagnetic field probe can be changed, and the measurement of a power frequency electric field is influenced; secondly, the solar panel, the battery and the power supply line can induce electromagnetic interference signals in the space and then conduct the electromagnetic interference signals to a measuring circuit in the probe, so that normal measurement of an electromagnetic field is influenced; finally, the solar panel power supply depends on the sunshine condition, and the long-term stable power supply reliability is poor. In summary, the above power supply methods cannot continuously supply power to the probe without completely avoiding the influence of the external metal.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide an electromagnetic field measuring probe and an electromagnetic field measuring system for solving the problem that the conventional power supply method cannot continuously supply power without completely avoiding the influence of external metal.
An electromagnetic field measurement probe comprising:
a housing defining a receiving cavity;
the photoelectric conversion device is arranged in the accommodating cavity, the shell is provided with a through hole, and the through hole is used for connecting the photoelectric conversion device and the light source;
The energy storage battery is arranged in the accommodating cavity; and
and the power circuit is arranged in the accommodating cavity, is respectively electrically connected with the photoelectric conversion device and the energy storage battery and is used for controlling the photoelectric conversion device to charge the energy storage battery.
According to the electromagnetic field measuring probe, the photoelectric conversion device is arranged in the accommodating cavity, so that the influence of metal parts in the photoelectric conversion device on a measuring electromagnetic field can be avoided. The photoelectric conversion device receives light energy and converts the light energy into electric energy, and the energy storage battery is charged through the power circuit, so that the electromagnetic field measuring probe is continuously powered. Therefore, the electromagnetic field measuring probe solves the problem that the power supply mode in the related art cannot continuously supply power under the influence of completely avoiding external metal.
In one embodiment, the electromagnetic field measuring probe further comprises a metal shielding layer, the metal shielding layer is arranged inside the shell, the photoelectric conversion device is attached to one side, away from the shell, of the metal shielding layer, a heat conduction material is filled between the photoelectric conversion device and the metal shielding layer, and the metal shielding layer is used for conducting heat generated by the photoelectric conversion device and isolating mutual influence between the power circuit and the electromagnetic field sensor of the electromagnetic field measuring probe.
an electromagnetic field measurement system comprising:
An electromagnetic field measurement probe, comprising:
A housing defining a receiving cavity;
the photoelectric conversion device is arranged in the accommodating cavity, the shell is provided with a through hole, and the through hole is used for connecting the photoelectric conversion device and the light source;
The energy storage battery is arranged in the accommodating cavity; and
the power supply circuit is arranged in the accommodating cavity, is respectively electrically connected with the photoelectric conversion device and the energy storage battery, and is used for controlling the photoelectric conversion device to charge the energy storage battery; and
And the electro-optical conversion device is in optical signal connection with the photoelectric conversion device and is used for providing a light source for the photoelectric conversion device.
in one embodiment, the electromagnetic field measurement probe further comprises:
and the temperature measuring device is arranged in the accommodating cavity and used for detecting the temperature of the photoelectric conversion device.
In one embodiment, the power supply circuit includes:
The charging and discharging control branch circuit is respectively electrically connected with the photoelectric conversion device and the energy storage battery and is used for controlling the photoelectric conversion device to charge the energy storage battery; and
And the voltage measuring branch circuit is electrically connected with the energy storage battery and is used for measuring the voltage of the energy storage battery.
in one embodiment, the electromagnetic field measurement probe further comprises:
The master control circuit is respectively electrically connected with the temperature measuring device, the charge-discharge control branch circuit and the voltage measuring branch circuit and is used for receiving the temperature of the photoelectric conversion device measured by the temperature measuring device and the voltage of the energy storage battery measured by the voltage measuring branch circuit;
The charging and discharging control branch circuit supplies power to the main control circuit.
In one embodiment, the electromagnetic field measurement system further comprises:
And the monitoring control device is electrically connected with the main control circuit and is used for receiving the control instruction of the main control circuit.
In one embodiment, the monitoring and control device includes:
The data transceiver is arranged in the accommodating cavity, is electrically connected with the main control circuit and is used for receiving the control instruction of the main control circuit and converting the control instruction into an optical signal;
And the monitoring device is connected with the data receiving and transmitting device through optical signals, is electrically connected with the electro-optical conversion device, and is used for processing the received control instruction of the main control circuit and controlling the electro-optical conversion device according to the control instruction.
In one embodiment, the data transceiver is optically connected to the monitoring device via an optical fiber.
In one embodiment, the electro-optical conversion device is connected with the optical signal of the photoelectric conversion device through an optical fiber, and the photoelectric conversion device and the optical fiber are fixed through a non-metal fixing piece.
According to the electromagnetic field measuring probe provided by the embodiment, the photoelectric conversion device is attached to the shell, and the heat conduction material is filled between the photoelectric conversion device and the shell, so that the photoelectric conversion device can be well cooled. The electromagnetic field measuring system can be free from the influence of weather and the like and can continuously work for a long time by adopting the electromagnetic field measuring probe and the electro-optical conversion device. The electro-optical conversion device is connected with the photoelectric conversion device through optical signals, and electric field distortion or interference on electromagnetic field measurement signals cannot be caused. Through setting up temperature measuring device with voltage measurement circuit can pass through master control circuit gathers photoelectric conversion device's temperature with the voltage of energy storage battery combines monitoring control device can realize the intelligent management to the charging process. The data transceiver is connected with the monitoring device through optical signals, the electromagnetic field measuring process is not affected, and the electromagnetic field measuring probe is continuously powered, and meanwhile, the electromagnetic field is accurately measured.
Drawings
Fig. 1 is a schematic external structural view of an electromagnetic field measurement probe according to an embodiment of the present disclosure;
Fig. 2 is a schematic diagram of an internal structure of an electromagnetic field measurement probe according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of an internal structure of an electromagnetic field measurement probe along the direction A-A in FIG. 2 according to an embodiment of the present application;
FIG. 4 is a schematic diagram of an internal structure of an electromagnetic field measurement probe along the direction B-B in FIG. 2 according to an embodiment of the present application;
FIG. 5 is a schematic structural diagram of an electromagnetic field measurement system according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of an electrical connection of an electromagnetic field measurement system according to an embodiment of the present disclosure;
FIG. 7 is a schematic diagram of an electrical connection relationship of another electromagnetic field measurement system provided in an embodiment of the present application;
Fig. 8 is a flowchart of a charging control method according to an embodiment of the present application;
Fig. 9 is a flowchart of another charging control method according to an embodiment of the present application;
fig. 10 is a logic block diagram of a control logic of an electromagnetic field measurement system according to an embodiment of the present application.
Description of the reference numerals
10 electromagnetic field measuring system
100 electromagnetic field measuring probe
110 casing
111 accommodating cavity
112 metal shielding layer
113 electromagnetic field sensor
120 photoelectric conversion device
130 through hole
140 energy storage battery
150 power supply circuit
151 charge and discharge control branch
152 voltage measuring branch
160 temperature measuring device
170 main control circuit
180 analog circuit board
200 electro-optical conversion device
210 holder
300 monitoring control device
310 data transceiver
320 monitoring device
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the embodiments disclosed below.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
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 application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
referring to fig. 1-4, an electromagnetic field measurement probe 100 is provided. The electromagnetic field measuring probe comprises a housing 110, a photoelectric conversion device 120, an energy storage battery 140 and a power circuit 150. The housing 110 defines a receiving chamber 111. The photoelectric conversion device 120 is disposed in the accommodating cavity 111, the housing 110 is provided with a through hole 130, and the through hole 130 is used for connecting the photoelectric conversion device 120 and a light source. The energy storage battery 140 is disposed in the accommodating cavity 111. The power circuit 150 is disposed in the accommodating cavity 111, and is electrically connected to the photoelectric conversion device 120 and the energy storage battery 140, respectively, for controlling the photoelectric conversion device 120 to charge the energy storage battery 140.
the shape of the housing 110 may be a regular cube, and six PCB circuit boards are disposed inside the regular cube shaped housing 110. The housing 110 may be made of a non-metallic material. In one embodiment, the side of the housing 110 is 80 mm. The three orthogonal PCBs are electric field sensor surfaces, and the electric field sensor adopts a circular electric field polar plate formed by copper cladding. A metal lead can be led out from the center of the polar plate outside the accommodating cavity 110 and connected to the input end of the conditioning circuit in the analog circuit board 180. The plate inside the receiving cavity 110 is grounded by a metal wire. The other three orthogonal PCB boards are magnetic field sensor planes. The magnetic field sensor is composed of a plurality of turns of copper-clad coils, and two leads of the terminals of the coils are connected to the input end of the conditioning circuit of the analog circuit board 180.
it is understood that the analog circuit board 180 is located within the receiving cavity 111 of the electromagnetic field measurement probe 100. The analog circuit board 180 is used for collecting and processing analog signals. The conditioning circuitry is located on the analog circuit board 180. The conditioning circuit comprises an electric field conditioning circuit and a magnetic field conditioning circuit. The electric field conditioning circuit can be an integrating circuit and is used for balancing the problem that the signal of the electric field antenna is uneven due to the frequency range. The magnetic field modulation circuit can be a differential circuit and is used for balancing the problem that the signal of the magnetic field antenna is uneven due to the frequency range.
The photoelectric conversion device 120 may be implemented using a laser power supply technology. With the development of laser energy transmission technology, a relatively mature laser power supply technology gradually appears. By adopting the photoelectric conversion device 120, a laser power supply technology can be introduced into the design of the low-frequency electromagnetic field measuring probe, so that the long-term stable and non-interference low-frequency electromagnetic field monitoring is realized, and a foundation is laid for a low-frequency electromagnetic environment on-line monitoring system. The photoelectric conversion device 120 is disposed in the accommodating cavity 111, so that the influence of metal components in the photoelectric conversion device 120 on the measurement electromagnetic field can be avoided. If the photoelectric conversion device 120 is disposed outside the accommodating cavity 111, the metal components and the power supply lines thereof may cause distortion of the electric field or interference with the spatial signal, thereby causing crosstalk to the internal circuit of the electromagnetic field measuring probe 100, and further affecting the measurement result of the electromagnetic field. The photoelectric conversion device 120 may receive laser light and convert the received laser light into electrical energy. Continuous power supply of the electromagnetic field measuring probe 100 can be achieved. The arrangement of the photoelectric conversion device 120 solves the problem that the power supply mode in the related art cannot continuously supply power under the influence of completely avoiding external metal.
it can be understood that, since the size of the electromagnetic field measuring probe 100 is relatively fixed, it is difficult to increase the size of the probe and redesign the sensor and the respective circuits. In addition, as the size of the electromagnetic field measurement probe 100 increases, the disturbance of the electromagnetic field increases. Therefore, on the basis of keeping the size and the structural framework of the electromagnetic field measurement probe 100, the original built-in large-capacity battery can be changed into a small-capacity battery to make room for placing the photoelectric conversion device 120.
The power supply circuit 150 is electrically connected to the photoelectric conversion device 120. The photoelectric conversion device 120 converts the laser into electric energy and charges the energy storage battery 140 through the power circuit 150. The laser power supply system is directly adopted for power supply, and the situation of unstable power supply can occur due to the influence of factors such as temperature and the like. Therefore, the power generated by the photoelectric conversion device 120 charges the energy storage battery 140 through the power circuit 150, so as to ensure the stability of the power supply process by using the power stored in the energy storage battery 140. It is understood that the energy storage battery 140 can be used for storing electric energy, and when the light source is out of order or damaged by human, the energy storage battery 140 can maintain the normal operation of the electromagnetic field measuring probe 100 for a certain period of time.
The electromagnetic field measuring probe 100 can prevent the metal component in the photoelectric conversion device 120 from interfering the electromagnetic field by disposing the photoelectric conversion device 120 in the accommodating cavity 111. The photoelectric conversion device 120 receives the laser light and converts the laser light into electric energy, and the energy storage battery 140 is charged by the power circuit 150, so that the electromagnetic field measuring probe 100 can stably work for a long time without being influenced by factors such as weather. In addition, the photoelectric conversion device 120 is not added to the size of the electromagnetic field measurement probe 100, and is realized only by an optimized design, so that the electromagnetic field measurement probe 100 has the advantages of simple structure, easiness in realization and the like on the basis of higher measurement accuracy. In summary, the electromagnetic field measurement probe 100 solves the problem that the power supply mode in the related art cannot continuously supply power under the influence of completely avoiding external metal.
In one embodiment, the electromagnetic field measurement probe 100 further comprises a metal shield 112. The metal shielding layer 112 is disposed inside the housing 110, and the photoelectric conversion device 120 is attached to one side of the metal shielding layer 112 away from the housing 110. A heat conducting material is filled between the photoelectric conversion device 120 and the metal shielding layer 112. The metal shielding layer 112 is used for conducting heat generated by the photoelectric conversion device 120 and isolating mutual influence between the power circuit 150 and the electromagnetic field sensor 113 of the electromagnetic field measurement probe 100. Since the photoelectric conversion device 120 dissipates heat more. By closely attaching the photoelectric conversion device 120 to the metal shield layer 112, a heat dissipation area can be increased. The electromagnetic field measuring probe 100 is provided with the housing 110, the electromagnetic field sensor 113 and the metal shielding layer 112 in sequence from outside to inside. In one embodiment, the electromagnetic field sensor 113 may be composed of three electric field sensors and three magnetic field sensors, and has a square shape. The metal shielding layer 112 may have a square shape. And at the position corresponding to the through hole 130 of the housing 110, both the electromagnetic field sensor 113 and the metal shielding layer 112 are provided with through holes for connecting the photoelectric conversion device 120 and a power supply. The electromagnetic field sensor 113 is located between the housing 110 and the metal shielding layer 112. The metal shielding layer 112 is also used to isolate the mutual influence between other circuits and elements inside the electromagnetic field measuring probe 100 and the electromagnetic field sensor 113 of the electromagnetic field measuring probe 100. The photoelectric conversion device 120 is tightly attached to the metal shielding layer 112, so that the heat dissipation area is increased. The heat dissipation can be further increased by filling a heat conducting material between the photoelectric conversion device 120 and the metal shielding layer 112. It is understood that the thermally conductive material may be a thermally conductive silicone gel.
Due to the relatively low efficiency of converting light energy into electric energy in the laser power supply technology in the related art, the electromagnetic field measuring probe 100 can adopt a low-power design. In one embodiment, the design of the low power consumption circuit may be accomplished by selecting a low power consumption chip. The on-line monitoring system applied to the electromagnetic field measuring probe 100 has low requirements on measuring speed and measuring precision. Therefore, the main control chip FPGA and the high-speed AD sampling chip with larger power consumption can be replaced by the ARM chip with low power consumption, such as STM32 series low-power-consumption chips. Meanwhile, the AD sampling function of the ARM chip is used for sampling, so that the energy consumption of the electromagnetic field measuring probe 100 can be greatly reduced. The power consumption of the electromagnetic field measuring probe 100 can be reduced to 0.4W, so as to reduce the requirement for the power of the light source in the laser power supply technology and reduce the heat generation in the photoelectric conversion device 120. In one embodiment, a light source with a power supply capacity of 0.5W may be selected, i.e., the power of the light source may be greater than the power consumption of the electromagnetic field measurement probe 100. Under the condition that the power of the light source is greater than the power consumption of the electromagnetic field measuring probe 100, the photoelectric conversion device 120 can ensure that the energy storage battery 140 has surplus electric quantity while ensuring the operation of the electromagnetic field measuring probe 100, and ensure that the use performance of the electromagnetic field measuring probe 100 is not affected.
In one embodiment, the electromagnetic field measurement probe 100 may support selecting different functions for different test environments. I.e. it is possible to selectively switch off some functions that are not required by the current test environment. For example, when the electromagnetic field measurement probe 100 is applied to monitoring high-voltage power transmission and transformation projects, generally, only 50Hz (power frequency) is used for monitoring, and other frequency bands can be turned off at the moment, so as to reduce energy consumption. In one embodiment, the electromagnetic field measurement probe 100 may be configured to turn off unused functionality for a time interval. For example, the time interval of the stationary online transmission is 3s, and then in the time interval of 3s, the electromagnetic field measurement probe 100 may turn off functions such as sampling, data transmission, data storage, and the like, so as to reduce power consumption. In one embodiment, the electromagnetic field measurement probe 100 is custom developed for different usage scenarios, thereby avoiding unnecessary device additions. For example, if a user only needs to measure transmission and transformation ac, the user only needs to develop the electromagnetic field measuring probe 100 capable of measuring only 50Hz, and does not need to design functions of frequency band selection, other frequency band monitoring and the like, so that power consumption and cost can be reduced at the same time.
Referring to fig. 5-6, an electromagnetic field measurement system 10 is provided. The electromagnetic field measurement system 10 includes an electromagnetic field measurement probe 100. The electromagnetic field measuring probe 100 includes a housing 110, a photoelectric conversion device 120, an energy storage battery 140, and a power circuit 150. The housing 110 defines a receiving chamber 111. The photoelectric conversion device 120 is disposed in the accommodating cavity 111, the housing 110 is provided with a through hole 130, and the through hole 130 is used for connecting the photoelectric conversion device 120 and a light source. The energy storage battery 140 is disposed in the accommodating cavity 111. The power circuit 150 is disposed in the accommodating cavity 111, and is electrically connected to the photoelectric conversion device 120 and the energy storage battery 140, respectively, for controlling the photoelectric conversion device 120 to charge the energy storage battery 140. The electro-optical conversion device 200 is connected to the photoelectric conversion device 120 by an optical signal, and is used for providing a light source for the photoelectric conversion device 120.
Specifically, referring to fig. 1 to 4, the housing 110, the photoelectric conversion device 120, the energy storage battery 140, and the power circuit 150 may be any one of the housing 110, the photoelectric conversion device 120, the energy storage battery 140, and the power circuit 150 provided in the foregoing embodiments, and details are not repeated herein.
in one embodiment, the electro-optical conversion device 200 is connected to the optical-to-electrical conversion device 120 by an optical fiber, and the optical-to-electrical conversion device 120 and the optical fiber are fixed by a non-metallic fixing member 210. One end of the optical fiber is connected to the electro-optical conversion device 200 through an optical signal, and the other end of the optical fiber is disposed in the accommodating cavity 111 through the through hole 130 and connected to the optical signal of the photoelectric conversion device 120 inside the accommodating cavity 111. The photoelectric conversion device 120, the optical fiber, and the electro-optical conversion device 200 together constitute a laser power supply system. The electro-optical conversion device 200 is used to provide a light source. In one embodiment, the electro-optical conversion device 200 may be a laser emission source for converting electrical energy into laser energy. During the electromagnetic field measurement process, non-insulated objects may distort the electric field or cross-talk interference signals into the electromagnetic field measurement probe 100 to affect the measurement result. The optical fiber has the insulation property, electromagnetic interference can be avoided by utilizing the insulation property of the optical fiber, and the influence of external cable power supply on electromagnetic field measurement in the related technology is avoided. The wavelength of the optical fiber corresponds to the electro-optical conversion device 200. The photoelectric conversion device 120 is a laser receiving end, and is configured to convert laser energy into electrical energy for output.
It is understood that high power lasers are potentially harmful to humans. As the laser supply power increases, the resulting power consumption and heat dissipation requirements also increase, resulting in an increase in the size of the laser supply device. Therefore, in order to reduce the harm to human body and reduce the size of the device, in one embodiment, a laser power supply device with smaller power can be selected.
The charging port of the electromagnetic field measuring probe in the related art is modified into a laser input port, and the laser input port is the through hole 130 formed in the middle blank position of the magnetic field coil in the magnetic field sensor surface. And the optical fiber is passed into the electromagnetic field measuring probe 100 from the laser input port and connected to the input port of the photoelectric conversion device 120. The optical fiber and the photoelectric conversion device 120 are permanently fixed, that is, the optical fiber and the photoelectric conversion device are integrally designed and cannot be inserted or pulled out. It can be understood that the optical fiber and the photoelectric conversion device 120 are integrally designed, so that laser light can be prevented from being accidentally injured by an operator due to improper operation when the optical fiber is inserted and pulled out. In addition, the integrated design can also reduce the loss problem caused by poor contact after multiple times of insertion and extraction. Meanwhile, the fixing member 210 for fixing the optical fiber and the photoelectric conversion device 120 is of a non-metal structure, so that the influence of metal exposure on electromagnetic field measurement is avoided. By the above-mentioned protection design, the safety of the electromagnetic field measurement system 10 can be improved, thereby avoiding potential injury to workers.
In one embodiment, the electromagnetic field measurement probe 100 further comprises a temperature measurement device 160. The temperature measuring device 160 is disposed in the accommodating cavity 111 and is used for detecting the temperature of the photoelectric conversion device 120. The temperature measuring device 160 may be a temperature sensor. The temperature sensor may be disposed near the photoelectric conversion device 120. The type of the temperature sensor is not limited as long as it can measure the temperature of the photoelectric conversion apparatus 120 and convert the temperature into a usable output signal. In one embodiment, the temperature sensor may be a contact or non-contact sensor.
Referring to fig. 7, in an embodiment, the power circuit 150 includes a charging/discharging control branch 151 and a voltage measuring branch 152. The charge and discharge control branch 151 is electrically connected to the photoelectric conversion device 120 and the energy storage battery 140, and is configured to control the photoelectric conversion device 120 to charge the energy storage battery 140. The voltage measuring branch 152 is electrically connected to the energy storage battery 140, and is configured to measure the voltage of the energy storage battery 140. It can be understood that, in addition to controlling the photoelectric conversion device 120 to charge the energy storage battery 140, the charging and discharging control branch 151 may also be used to control the energy storage battery 140 to supply power to the devices and circuits in the electromagnetic field measurement probe 100. In one embodiment, the charging and discharging control branch 151 includes a battery charging branch and a branch for supplying power to other circuit boards.
In one embodiment, the electromagnetic field measurement probe 100 further includes a master control circuit 170. The main control circuit 170 is electrically connected to the temperature measuring device 160, the charge and discharge control branch 151, and the voltage measuring branch 152, and is configured to receive the temperature of the photoelectric conversion device 120 measured by the temperature measuring device 160 and the voltage of the energy storage battery 140 measured by the voltage measuring branch 152. The charge and discharge control branch 151 supplies power to the main control circuit 170. It is understood that the main control circuit 170 is located on a digital circuit board in the electromagnetic field measuring probe 100. The data of the electric field and the magnetic field measured by the electromagnetic field measuring probe 100 are transmitted to the analog circuit board 180, and then the analog circuit board 180 processes the analog signal and transmits the processed analog signal to the digital circuit board for further processing. In one embodiment, the main control circuit 170 may collect the temperature of the photoelectric conversion device 120 and the voltage of the energy storage battery 140. Through the temperature and the voltage, the process of laser power supply in the electromagnetic field measuring probe 100 can be monitored, thereby improving the safety of laser power supply.
in one embodiment, the electromagnetic field measurement system 10 further includes a monitoring control device 300. The monitoring control device 300 is electrically connected to the main control circuit 170, and is configured to receive a control instruction of the main control circuit 170.
In one embodiment, the monitoring and control device 300 includes a data transceiver 310 and a monitoring device 320. The data transceiver 310 is disposed in the accommodating cavity 111, electrically connected to the main control circuit 170, and configured to receive a control instruction of the main control circuit 170 and convert the control instruction into an optical signal. The monitoring device 320 is connected to the data transceiver 310 through an optical signal, and electrically connected to the electrical-to-optical converter 200, and is configured to process the received control command of the main control circuit 170 and control the electrical-to-optical converter 200 according to the control command. During the electromagnetic field measurement process, non-insulated objects may distort the electric field or cross-talk interference signals into the electromagnetic field measurement probe 100 to affect the measurement result. It is understood that the monitoring device 320 is connected to the data transceiver 310 via optical fibers. The optical fiber has the insulation characteristic, electromagnetic interference can be avoided by utilizing the insulation characteristic of the optical fiber, and the influence of an external signal line on electromagnetic field measurement in the related technology is avoided. The wavelength of the optical fiber corresponds to the electro-optical conversion device 200.
It can be understood that two through holes are formed in the middle blank position of the magnetic field coil in one magnetic field sensor surface. One of the through holes is the through hole 130, i.e., the laser input port. The laser input port may connect the photoelectric conversion device 120 with the laser transmission device 210 through an optical signal, so as to supply laser power to the electromagnetic field measurement probe 100. The other through hole is a data output port, and the optical fiber is connected to the data transceiver 310 and the monitoring device 320 through the data output port by optical signals. The main control circuit 170 may convert the control command into an optical signal through the data transceiver 310, and the optical signal is transmitted to the monitoring device 320 through the optical fiber for processing. The monitoring device 320 can receive and process the optical signal carrying the control command to control the electro-optical conversion device 200. It is understood that the monitoring device 320 includes a data conversion device and a data processing device. The data conversion device is used for converting the optical signal into a processable electrical signal, and the electrical signal is converted into a control instruction after being processed by the data processing device, so that the intelligent control of the electro-optical conversion device 200 is realized.
Referring to fig. 8, the present application provides a method for controlling an electromagnetic field measurement system. The control method of the electromagnetic field measurement system includes S100, where the main control circuit 170 monitors the temperature of the photoelectric conversion device 120 and the voltage of the energy storage battery 140. S200, when the temperature of the photoelectric conversion device 120 is higher than a preset critical temperature or the electric energy of the energy storage battery 140 is higher than a preset critical electric energy, the monitoring device 320 receives a control instruction of the main control circuit 170, so as to control the electro-optical conversion device 200 to be turned off. S300, when the temperature of the photoelectric conversion device 120 is lower than a preset threshold temperature and the electric quantity of the energy storage battery 140 is lower than a preset threshold electric quantity, the monitoring device 320 receives a control instruction of the main control circuit 170, so as to control the opening of the electro-optical conversion device 200.
Referring to fig. 9, the order of detecting the voltage of the energy storage battery 140 and the temperature of the photoelectric conversion device 120 is not limited. In one embodiment, the electromagnetic field measurement system control method may monitor the voltage of the energy storage battery 140 and the temperature of the photoelectric conversion device 120 synchronously.
in the step S100, the main control circuit 170 monitors the temperature of the photoelectric conversion device 120 and the voltage of the energy storage battery 140. The monitoring host 320 communicates with the master control circuit 170 through the optical fiber and the data transceiver 310. It is understood that the temperature of the photoelectric conversion device 120 is monitored by the temperature measuring device 160, and the voltage of the energy storage battery 140 is monitored by the voltage measuring branch 152 in the power circuit 150.
In the steps S200 and S300, the temperature measuring device 160 is built in the electromagnetic field measuring probe 100, and the temperature of the photoelectric conversion device 120 can be monitored by the temperature measuring device 160. The temperature measuring device 160 transmits the collected temperature data to the main control circuit 170. The power circuit 150 is disposed in the electromagnetic field measuring probe 100, and the power circuit 150 can monitor the charging process of the energy storage battery 140, and can obtain the state information related to the energy storage battery 140 and transmit the state information to the main control circuit 170.
when the main control circuit 170 monitors that the temperature of the photoelectric conversion device 120 is higher than a preset critical temperature, the main control circuit 170 generates a control instruction according to the collected data, converts the control instruction into an optical signal, and sends the optical signal to the monitoring host 320 through an optical fiber. The monitoring host 320 controls the electro-optical conversion device 200 to be turned off. The electro-optical conversion device 200 stops transmitting laser light, and the energy storage battery 140 is charged. Alternatively, when the main control circuit 170 monitors that the voltage of the energy storage battery 140 is higher than a preset threshold voltage, the monitoring host 320 receives a control signal of the main control circuit 170. The monitoring host 320 controls the electro-optical conversion device 200 to be turned off. The electro-optical conversion device 200 stops transmitting laser light, and the energy storage battery 140 is charged.
When the master control circuit 170 monitors that the temperature of the photoelectric conversion device 120 is lower than a preset threshold temperature and the master control circuit 170 monitors that the voltage of the energy storage battery 140 is lower than a preset threshold voltage, the master control circuit 170 generates a control command. Control commands are transmitted to the monitoring host 320 via the data transceiver 310. The monitoring host 320 controls the electro-optical conversion device 200 to start to deliver laser light, and the energy storage battery 140 starts to charge.
The preset threshold temperature and the preset threshold voltage may be set according to actual conditions. It is understood that, in order to avoid the instability of the laser power supply from affecting the operation of the electromagnetic field measuring probe 100, the electromagnetic field measuring probe 100 is powered by the energy storage battery 140. It is understood that the master control circuit 170 of the electromagnetic field measurement probe 100 communicates with the monitoring device 320 through an optical fiber. The monitoring host 320 may control the electro-optical conversion device 200 to turn on or off after receiving the control command from the main control circuit 170. The control method of the electromagnetic field measurement system optimizes the charging and power supply management process, and can maintain the stability of the energy storage battery 140 while protecting laser power supply related devices.
Referring to fig. 10, in one embodiment, the electro-optical conversion device 200 outputs laser light to the photoelectric conversion device 120 through an optical fiber without affecting the measurement of the electromagnetic field. The energy storage battery 140 can be charged by the electric energy generated by the photoelectric conversion device 120 through the power circuit 150. The energy storage battery 140 supplies power to the main control circuit 170, the analog circuit board 180 and other circuits, and the stability of the power supply process can be ensured. The temperature sensor 160 detects the temperature of the photoelectric conversion device 120. The power supply circuit 150 detects the voltage of the energy storage battery 140. After the temperature and the voltage data are processed by the main control circuit 170, the main control circuit 170 generates a control command and transmits the control command to the data transceiver 310. The data transceiver 310 converts the electrical signal into an optical signal, and transmits the optical signal to the monitoring host 320 via an optical fiber, which also does not affect the electromagnetic field measurement process. The monitoring host 320 controls the opening or closing of the electro-optical conversion device 200 according to the control command, so that the electro-optical conversion device 200 can be intelligently controlled. The electric field sensor and the magnetic field sensor respectively measure the electric field and the magnetic field intensity, and after the electric field and the magnetic field intensity are processed by the circuit on the analog circuit board 180, the measured signals are transmitted to the main control circuit 170 in the digital circuit for processing, so that the measuring process of the electromagnetic field is completed.
in summary, by introducing the laser power supply related device into the electromagnetic field measuring probe 100 and combining the insulation characteristic of the optical fiber, the electric quantity can be continuously guided to the electromagnetic field measuring probe 100 to charge the electromagnetic field measuring probe 100 through the laser power supply mode, so that the electromagnetic field measuring probe 100 does not generate the monitoring interruption condition due to the low capacity of the energy storage battery 140 or the influence of weather factors.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An electromagnetic field measurement probe (100), comprising:
A housing (110) defining a receiving chamber (111);
The photoelectric conversion device (120) is arranged in the accommodating cavity (111), the shell (110) is provided with a through hole (130), and the through hole (130) is used for connecting the photoelectric conversion device (120) and a light source;
The energy storage battery (140) is arranged in the accommodating cavity (111); and
And the power supply circuit (150) is arranged in the accommodating cavity (111), is respectively electrically connected with the photoelectric conversion device (120) and the energy storage battery (140), and is used for controlling the photoelectric conversion device (120) to charge the energy storage battery (140).
2. the electromagnetic field measurement probe (100) according to claim 1, wherein the electromagnetic field measurement probe (100) further comprises a metal shielding layer (112), the metal shielding layer (112) is disposed inside the housing (110), the photoelectric conversion device (120) is disposed on a side of the metal shielding layer (112) away from the housing (110), a heat conducting material is filled between the photoelectric conversion device (120) and the metal shielding layer (112), and the metal shielding layer (112) is configured to conduct heat generated by the photoelectric conversion device (120) and isolate mutual influence between the power circuit (150) and the electromagnetic field sensor (113) of the electromagnetic field measurement probe (100).
3. an electromagnetic field measurement system (10), comprising:
An electromagnetic field measurement probe (100), the electromagnetic field measurement probe (100) comprising:
A housing (110) defining a receiving chamber (111);
the photoelectric conversion device (120) is arranged in the accommodating cavity (111), the shell (110) is provided with a through hole (130), and the through hole (130) is used for connecting the photoelectric conversion device (120) and a light source;
The energy storage battery (140) is arranged in the accommodating cavity (111); and
The power supply circuit (150) is arranged in the accommodating cavity (111), is respectively electrically connected with the photoelectric conversion device (120) and the energy storage battery (140), and is used for controlling the photoelectric conversion device (120) to charge the energy storage battery (140); and
And the electro-optical conversion device (200) is connected with the photoelectric conversion device (120) in an optical signal mode and is used for providing a light source for the photoelectric conversion device (120).
4. the electromagnetic field measurement system (10) of claim 3, wherein the electromagnetic field measurement probe (100) further comprises:
and the temperature measuring device (160) is arranged in the accommodating cavity (111) and is used for detecting the temperature of the photoelectric conversion device (120).
5. The electromagnetic field measurement system (10) of claim 4, characterized in that the power supply circuit (150) comprises:
the charging and discharging control branch circuit (151) is respectively electrically connected with the photoelectric conversion device (120) and the energy storage battery (140) and is used for controlling the photoelectric conversion device (120) to charge the energy storage battery (140); and
And the voltage measuring branch (152) is electrically connected with the energy storage battery (140) and is used for measuring the voltage of the energy storage battery (140).
6. the electromagnetic field measurement system (10) of claim 5, wherein the electromagnetic field measurement probe (100) further comprises:
The main control circuit (170) is electrically connected with the temperature measuring device (160), the charge-discharge control branch (151) and the voltage measuring branch (152), and is used for receiving the temperature of the photoelectric conversion device (120) measured by the temperature measuring device (160) and the voltage of the energy storage battery (140) measured by the voltage measuring branch (152);
the charging and discharging control branch circuit (151) supplies power to the main control circuit (170).
7. The electromagnetic field measurement system (10) of claim 6, wherein the electromagnetic field measurement system (10) further comprises:
and the monitoring control device (300) is electrically connected with the main control circuit (170) and is used for receiving a control instruction of the main control circuit (170).
8. the electromagnetic field measurement system (10) of claim 7, characterized in that the monitoring control device (300) comprises:
The data transceiver (310) is arranged in the accommodating cavity (111), is electrically connected with the main control circuit (170), and is used for receiving a control instruction of the main control circuit (170) and converting the control instruction into an optical signal;
And the monitoring device (320) is connected with the data transceiver (310) through optical signals, is electrically connected with the electro-optical conversion device (200), and is used for processing the received control command of the main control circuit (170) and controlling the electro-optical conversion device (200) according to the control command.
9. The electromagnetic field measurement system (10) of claim 8, wherein the data transceiver device (310) is optically signal connected to the monitoring device (320) via an optical fiber.
10. the electromagnetic field measurement system (10) of claim 3, characterized in that the electro-optical conversion device (200) is optically connected to the photoelectric conversion device (120) by an optical fiber, and the photoelectric conversion device (120) and the optical fiber are fixed by a non-metallic fixing member (210).
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| CN201920142600.XU CN209764950U (en) | 2019-01-28 | 2019-01-28 | Electromagnetic field measuring probe and electromagnetic field measuring system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109856462A (en) * | 2019-01-28 | 2019-06-07 | 深圳供电局有限公司 | Electromagnetic field measurements probe, electromagnetic field measuring system and control method |
| CN111879446A (en) * | 2020-07-16 | 2020-11-03 | 南昌航空大学 | Sensor for measuring stress of non-directional alternating current electromagnetic field of ferromagnetic component |
-
2019
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109856462A (en) * | 2019-01-28 | 2019-06-07 | 深圳供电局有限公司 | Electromagnetic field measurements probe, electromagnetic field measuring system and control method |
| CN111879446A (en) * | 2020-07-16 | 2020-11-03 | 南昌航空大学 | Sensor for measuring stress of non-directional alternating current electromagnetic field of ferromagnetic component |
| CN111879446B (en) * | 2020-07-16 | 2022-04-08 | 南昌航空大学 | Sensor for measuring stress of non-directional alternating current electromagnetic field of ferromagnetic component |
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