CN212808442U

CN212808442U - Power frequency electromagnetic field intensity on-line monitoring transmitter with stable performance

Info

Publication number: CN212808442U
Application number: CN202021347876.0U
Authority: CN
Inventors: 林德焱; 杨乐群; 陶文康; 余良英; 刘立明
Original assignee: Wuhan Bihai Yuntian Technology Co ltd
Current assignee: Wuhan Bihai Yuntian Technology Co ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2021-03-26
Anticipated expiration: 2030-07-10

Abstract

The utility model provides a power frequency electromagnetic field intensity on-line monitoring changer of stable performance, the changer subassembly includes the aluminium side integrated package as the support frame, has optic fibre switching circuit board through screw fixed mounting on the aluminium side integrated package, and optic fibre switching circuit board links to each other with the changer circuit board of installing in the aluminium side integrated package, set up the radiating groove that is used for distributing away the heat that photocell and changer circuit board produced on the aluminium side integrated package. The design of the radiating groove increases the radiating surface area and improves the radiating effect, thereby effectively controlling the temperature drift problem, prolonging the calibration period of the sensor and reducing the labor intensity and the operation cost of the technical management of the on-line monitoring system.

Description

Power frequency electromagnetic field intensity on-line monitoring transmitter with stable performance

Technical Field

The utility model relates to an electromagnetic field monitoring technology field specifically is a stable performance's power frequency electromagnetic field intensity on-line monitoring changer.

Background

With the development of economic construction and the progress of scientific technology, China has enjoyed achievements in the aspects of power equipment, communication networks, vehicles and the like. The development of various fields and the application of advanced electronic equipment enable the life of people to be fast and convenient, improve the living standard of people in material and culture, and need people to research how to measure and protect the radiation of electromagnetic waves.

Electromagnetic field radiation with intensity higher than a certain intensity can cause dysfunction of the central nervous system of a human body and vegetative nerve disorder mainly caused by fatigue and tension of sympathetic nerves, the clinical symptoms can be manifested as dizziness, insomnia, dreaminess, fatigue, weakness, hypomnesis, palpitation, headache, soreness of limbs, inappetence, alopecia, hyperhidrosis and the like, and some people can also have symptoms of bradycardia, blood pressure reduction, arrhythmia and the like. The electromagnetic field is a soundless, lightless and tasteless action field which is not strong enough and can not be felt by people, so that the harm has strong concealment and is not noticed and valued by people. In order to ensure the physical health of people, the state sets corresponding laws and regulations and national standards, and for electromagnetic radiation environmental management, the state has more systematic laws and regulations and standards.

At present, electromagnetic radiation is generally measured by a portable electromagnetic field measuring instrument. Along with the enhancement of environmental awareness of people, society and the public know more and more about living environment and radiation hazard, a healthy living environment is required, facilities related to radiation hazard pay more attention, the country pays more attention to environment protection work, and for transformer substations, communication base stations and nearby large-scale equipment with electromagnetic radiation, people need long-term real-time online monitoring, and the information of the electromagnetic radiation in relevant areas and the national standard allowable limit value are released through a large screen or a public information platform and are transmitted to an environment protection function management department through a network to monitor and manage radiation conditions. The public can more intuitively and correctly know the electromagnetic field radiation size near the facilities such as the transformer substation, the communication base station … and the like, and the psychological panic of the public around the facilities is avoided.

The on-line monitoring system requires accurate monitoring data in the monitoring process and can work continuously for a long time. The power frequency probe of the original portable electromagnetic field intensity instrument is provided with a built-in battery and a circuit board, the circuit board and the battery of the probe are placed in a square hexahedron, a polar plate and a coil assembly which are perpendicular to each other are respectively arranged on the hexahedron, an optical fiber output communication interface is arranged on the polar plate, a charging socket is arranged on the polar plate and can be used for repeated charging, the outside of the probe is not provided with any metal wire except for the polar plate and the coil which are used for sensing, and the interference caused by the metal wire is avoided. However, in the real-time online monitoring process, the monitoring device is unattended, people only see the data result displayed by a large screen, if the sensor working online is powered by a battery, the sensor cannot work continuously for a long time when the electricity is used up and needs to be charged, and if the sensor is connected with a charger for charging and supplying electricity, the metal wire senses the space electromagnetic wave like an antenna; if the sensor does not need to be powered by a battery and is designed to be powered by external alternating current to direct current, the power line has the same problem, and the fact proves that the external metal wire induces interference caused by space electromagnetic waves, so that the measurement result brings hundreds of times of errors, the display data is unstable, and the space electromagnetic waves also interfere the circuit board. How to solve the problem of power supply to the sensor and the problem of interference of electromagnetic waves to the circuit board? The problem is solved by adopting laser-photocell power supply, the photocell is integrated in the probe, the laser is transmitted to the photocell through the optical fiber to generate electric energy for power supply, and the induction interference of a metal wire is avoided. Through application of several years, the fact that the laser irradiates the photoelectric cell for a long time is found, the temperature inside the probe rises to a certain degree, the service life of the photoelectric cell and the stability of a measuring circuit are influenced to a certain degree, the output of the electromagnetic field sensor generates certain temperature drift, and then the correction period of the electromagnetic field sensor is shortened. How to solve the inside temperature rise of changer is the problem that this patent will be solved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a power frequency electromagnetic field intensity on-line monitoring changer of stable performance, the temperature that the power supply of having solved the sensor generates heat and arouses floats the problem, has guaranteed that on-line monitoring system electromagnetic field monitoring data is accurate, the system does not have to be interrupted long-term stable work, has prolonged electromagnetic field sensor's correction cycle, has reduced on-line monitoring system's operation cost.

The technical scheme of the utility model:

a power frequency electromagnetic field intensity on-line monitoring transmitter with stable performance comprises a transmitter assembly, a cover cap is arranged above the transmitter assembly, a bottom cover is arranged below the transmitter assembly, the cover cap and the bottom cover are matched to completely cover the transmitter assembly, the top end of a supporting tube is connected below the bottom cover, a bottom supporting seat is connected with the bottom end of the supporting tube, the bottom supporting seat is fixedly arranged on a pre-buried base station through a fastening assembly, a pre-buried cable tube is arranged in the pre-buried base station and is communicated with the supporting tube to facilitate the optical fiber cable to be connected to a control center from the transmitter assembly, the transmitter assembly comprises an aluminum square integrated block serving as a supporting frame, an optical fiber switching circuit board is fixedly arranged on the aluminum square integrated block through screws, the optical fiber switching circuit board is connected with a transmitter circuit board arranged in the aluminum square integrated block, and an optical fiber RX socket, optical fiber RX socket and optic fibre TX socket connect fiber connector, and fiber connector is connected to the optical fiber cable, has the photocell through countersunk screw fixed mounting on the aluminium side integrated package, the laser transmission fiber connector is connected to the photocell, and fiber connector and laser transmission fiber connector all are connected to pre-buried cable pipe, set up the radiating groove that is used for distributing away the heat that photocell and changer circuit board produced on the aluminium side integrated package.

Install X to parallel polar plate, Y to parallel polar plate and Z to parallel polar plate at the adjacent trilateral of aluminium side manifold block, install coil pack on three other faces of aluminium side manifold block, coil pack passes through the nylon screw and installs on the aluminium side manifold block, and X is connected with insulating tape to parallel polar plate, Y to parallel polar plate and Z to parallel polar plate junction, Z installs preceding shield plate between parallel polar plate and the aluminium side manifold block, installs the back shield plate with Z between the corresponding coil pack of parallel polar plate and the aluminium side manifold block, leaves the space between back shield plate and the aluminium side manifold block and is used for placing the transmitter circuit board.

And the aluminum square integrated block is provided with a socket wire hole for facilitating the wire of the optical fiber RX socket and the optical fiber TX socket to pass through.

And a battery cavity for placing a photocell is formed in the aluminum square integrated block, and the battery cavity is close to the heat dissipation groove.

The transmitter circuit board is arranged close to the heat dissipation groove.

The radiating grooves are arranged in a plurality of modes, and the radiating grooves are in a honeycomb shape on the aluminum square integrated block.

And the transmitter circuit board is provided with an amplifying circuit chip and an A/D conversion chip.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses accomplish signal amplification, AD conversion inside the changer, change digital signal into and send to the host computer and handle, improved signal data transmission's reliability. Compared with the original product, the structure resource of the aluminum square integrated block is fully utilized, a plurality of grooves are designed on the integrated block, the heat dissipation surface area of the heating body is increased, the heat dissipation performance is improved, the transmitter circuit works in a normal temperature range, the excessive change of the temperature is prevented, and the ultra-poor accuracy of the measurement result is caused.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural diagram of a transmitter assembly according to the present invention.

Fig. 3 is a schematic diagram of a transmitter assembly according to the present invention.

Fig. 4 is a plan view of the aluminum square integrated block of the present invention.

Fig. 5 is a cross-sectional view taken along line C-C of fig. 4.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in FIGS. 1-5, the on-line monitoring transmitter for the power frequency electromagnetic field intensity with stable performance comprises a transmitter assembly 1, a cover cap 2 is arranged above the transmitter assembly 1, a bottom cover 4 is arranged below the transmitter assembly 1, the cover cap 2 and the bottom cover 4 are matched to completely cover the transmitter assembly 1, the bottom cover 4 is connected with the top end of a support tube 5, the bottom end of the support tube 5 is connected with a bottom support seat 6, the bottom support seat 6 is fixedly arranged on a pre-buried base station 9 through a fastening assembly 7, a pre-buried cable tube 8 is arranged in the pre-buried base station 9, the pre-buried cable tube 8 is communicated with the support tube 5 to facilitate the optical fiber cable 3 to be connected into a control center from the transmitter assembly 1, the transmitter assembly 1 comprises an aluminum square integrated block 10 serving as a support frame, an optical fiber switching circuit board 11 is fixedly arranged on the aluminum square integrated block 10 through screws, the optical switching circuit board 11 is connected with, be provided with optic fibre RX socket 15 and optic fibre TX socket 16 on optic fibre adapter circuit board 11, optic fibre RX socket 15 and optic fibre TX socket 16 connect fiber connector, and fiber connector is connected to optical fiber cable 3, has photocell 13 through countersunk screw fixed mounting on aluminium side integrated package 10, laser transmission fiber connector 12 is connected to photocell 13, and fiber connector and laser transmission fiber connector 12 all are connected to pre-buried cable pipe 8, offer the radiating groove 100 that is used for distributing away the heat that photocell 13 and transmitter circuit board 14 produced on the aluminium side integrated package 10.

The three adjacent faces of the aluminum square manifold block 10 are provided with an X-direction parallel polar plate 17, a Y-direction parallel polar plate 18 and a Z-direction parallel polar plate 19, coil assemblies 20 are arranged on the other three faces of the aluminum square manifold block 10, the coil assemblies 20 are arranged on the aluminum square manifold block 10 through nylon screws, the joints of the X-direction parallel polar plate 17, the Y-direction parallel polar plate 18 and the Z-direction parallel polar plate 19 are connected through insulating adhesive tapes 23, a front shielding plate 21 is arranged between the Z-direction parallel polar plate 19 and the aluminum square manifold block 10, a rear shielding plate 22 is arranged between the coil assemblies 20 corresponding to the Z-direction parallel polar plate 19 and the aluminum square manifold block 10, and a space is reserved between the rear shielding plate 22 and the aluminum square manifold block 10 for placing a transmitter circuit board 14.

The aluminum square integrated block 10 is provided with a socket wire hole 101 for facilitating the wire passing of the optical fiber RX socket 15 and the optical fiber TX socket 16.

The aluminum square integrated block 10 is provided with a battery cavity 102 for placing the photocell 13, and the battery cavity 102 is arranged close to the heat dissipation groove 100.

The transmitter circuit board 14 is mounted proximate to heat sink 100.

The heat dissipation grooves 100 are provided in plural, and the plural heat dissipation grooves 100 are formed in a honeycomb shape in the aluminum square manifold block 10.

And an amplifying circuit chip and an A/D conversion chip are mounted on the transmitter circuit board 14.

The utility model discloses a power frequency electromagnetic field intensity on-line monitoring changer of stable performance, the changer device changes the analog signal transmission who records into digital signal transmission, has avoided unnecessary interference, has improved data transmission's reliability.

The transmitter integrates all parts by adopting the integrated block, has compact structure, optimizes the wiring of the line, avoids the interference caused by the crossing of the wires and improves the stability and the accuracy of the measurement of the sensor;

the integrated block is used as a radiator of the heating body, so that the size and the weight of the transmitter are reduced, the heat dissipation surface area is increased due to the multi-groove design of the integrated block, the heat dissipation effect is improved, the temperature drift problem is effectively controlled, the calibration period of the sensor is prolonged, and the labor intensity and the operation cost of the technical management of the online monitoring system are reduced.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A power frequency electromagnetic field intensity on-line monitoring transmitter with stable performance comprises a transmitter assembly (1), wherein a cover cap (2) is arranged above the transmitter assembly (1), a bottom cover (4) is arranged below the transmitter assembly (1), the cover cap (2) and the bottom cover (4) are matched to completely cover the transmitter assembly (1), the bottom cover (4) is connected with the top end of a supporting tube (5), the bottom end of the supporting tube (5) is connected with a bottom supporting seat (6), the bottom supporting seat (6) is fixedly arranged on a pre-buried base station (9) through a fastening assembly (7), a pre-buried cable tube (8) is arranged in the pre-buried base station (9), the pre-buried cable tube (8) is communicated with the supporting tube (5) and used for facilitating the optical fiber cable (3) to be accessed to a control center from the transmitter assembly (1), and is characterized in that the transmitter assembly (1) comprises an aluminum square integrated block (10) serving as a, an optical fiber switching circuit board (11) is fixedly arranged on the aluminum square integrated block (10) through screws, the optical fiber switching circuit board (11) is connected with a transmitter circuit board (14) arranged in the aluminum square integrated block (10), an optical fiber RX socket (15) and an optical fiber TX socket (16) are arranged on the optical fiber switching circuit board (11), the optical fiber RX socket (15) and the optical fiber TX socket (16) are connected with an optical fiber connector, the optical fiber connector is connected with an optical fiber cable (3), a photocell (13) is fixedly arranged on the aluminum square integrated block (10) through a sunk screw, the photocell (13) is connected with the laser transmission optical fiber connector (12), the optical fiber connector and the laser transmission optical fiber connector (12) are both connected with the pre-buried cable pipe (8), the aluminum square integrated block (10) is provided with a heat dissipation groove (100) for dissipating heat generated by the photocell (13) and the transmitter circuit board (14).

2. The on-line monitoring transmitter of power frequency electromagnetic field intensity with stable performance of claim 1, characterized in that, three adjacent faces of the aluminum-side manifold block (10) are installed with an X-direction parallel polar plate (17), a Y-direction parallel polar plate (18) and a Z-direction parallel polar plate (19), the other three faces of the aluminum-side manifold block (10) are installed with coil components (20), the coil components (20) are installed on the aluminum-side manifold block (10) through nylon screws, the joints of the X-direction parallel polar plate (17), the Y-direction parallel polar plate (18) and the Z-direction parallel polar plate (19) are connected by an insulating adhesive tape (23), a front shielding plate (21) is installed between the Z-direction parallel polar plate (19) and the aluminum-side manifold block (10), and a rear shielding plate (22) is installed between the coil components (20) corresponding to the Z-direction parallel polar plate (19) and the aluminum-side manifold block (10), a space is left between the rear shielding plate (22) and the aluminum square integrated block (10) for placing the transmitter circuit board (14).

3. The on-line monitoring transmitter of power frequency electromagnetic field intensity with stable performance as claimed in claim 1, characterized in that said aluminum square integrated block (10) is provided with a socket wire hole (101) for facilitating the wire penetration of the fiber RX socket (15) and the fiber TX socket (16).

4. The power frequency electromagnetic field intensity on-line monitoring transmitter with stable performance as claimed in claim 1, wherein a battery cavity (102) for placing the photocell (13) is formed on the aluminum square integrated block (10), and the battery cavity (102) is formed close to the heat dissipation groove (100).

5. The on-line monitoring transmitter of power frequency electromagnetic field intensity with stable performance of claim 1, characterized in that transmitter circuit board (14) is installed next to heat sink (100).

6. The online monitoring transmitter of power frequency electromagnetic field intensity of claim 1, characterized in that the heat dissipation grooves (100) are provided in plural, and the plural heat dissipation grooves (100) are honeycomb-shaped on the aluminum square manifold block (10).

7. The on-line monitoring transmitter of power frequency electromagnetic field intensity with stable performance as claimed in claim 1, characterized in that said transmitter circuit board (14) is mounted with an amplifying circuit chip and an A/D conversion chip.