Radar material flow sensor

Abstract

A radar material flow sensor provided by the utility model comprises a shell, a lens, a radio frequency board, a core processing board and a communication plug, a cavity is arranged in the shell, the lens is installed in the cavity, the lower end of the lens extends out of the bottom of the shell, the radio frequency board and the core processing board are located in the cavity and fixed on the lens, and the communication plug is connected with the radio frequency board and the core processing board. The radio frequency board is located at the focal point of the lens, the radio frequency board is connected with the core processing board through a flat cable, and the core processing board is connected with the communication plug through a cable. The sensor is suitable for measuring the material flow on the belt in severe environments such as dust and water vapor, and has the advantages of simple structure, convenience in installation, low cost and the like.

Description

Technical Field

[0001] The utility model mainly relates to the technical field related to sensors, in particular to a radar material flow sensor. Background Art

[0002] For the measurement of material flow on a belt, such as the measurement of coal flow on a coal mine belt, corresponding sensors are required.

[0003] The main principle of material flow measurement is to first calibrate the distance from the belt to the probe on an empty belt, then measure the distance from the material to the probe, and use an algorithm to calculate the material flow on the belt. For example, in the related technology of a belt scale based on laser ranging, published in CN104515572A, a laser head (i.e., a laser sensor) scans the material surface to obtain the cross-sectional shape. This is then combined with the belt speed obtained by the belt speed measurement device to ultimately determine the material mass transported per unit time on the belt. Another example is published in CN107727207A, an optical belt scale and its measurement method, which uses a laser combined with a camera to establish the material spot coordinates and calculate the total weight of the material.

[0004] In the existing technology, the sensors used are mainly laser sensors, which have the advantages of fast measurement speed and high measurement accuracy. However, in environments with high dust or water vapor, they are affected by dust, water vapor, etc., but have poor stability and high cost. Utility Model Content

[0005] In order to solve the shortcomings of current technology, the utility model combines existing technology and, based on practical applications, provides a radar material flow sensor, which is suitable for measuring material flow on a belt in harsh environments such as high dust and water vapor. It has the advantages of simple structure, easy installation and low cost.

[0006] The technical solution of the utility model is as follows:

[0007] A radar material flow sensor includes a shell, a lens, a radio frequency board, a core processing board and a communication plug. A cavity is provided inside the shell, and the lens is installed in the cavity. The lower end of the lens extends from the bottom of the shell. The radio frequency board and the core processing board are located in the cavity and fixed on the lens. The radio frequency board is located at the focus of the lens. The radio frequency board and the core processing board are connected by a cable, and the core processing board and the communication plug are connected by a cable.

[0008] Furthermore, the shell includes an upper shell and a lower shell, the upper shell and the lower shell are connected by threads or snaps, the lens, radio frequency board and core processing board are all installed in the lower shell, and the communication plug is installed in the upper shell.

[0009] Furthermore, a limit platform is provided in the cavity of the lower shell, a flange is provided on the top of the lens, the lens is placed into the cavity through the opening at the upper end of the lower shell, the flange of the lens is pressed against the limit platform and fastened by the lens fixing screws.

[0010] Furthermore, a mounting cavity is provided inside the lens, a mounting ring is provided in the mounting cavity, and the RF board is placed into the mounting ring in the mounting cavity through the opening at the top of the lens and fixed by screws.

[0011] Furthermore, the core processing board is fixed to the upper surface of the lens flange through copper studs.

[0012] Furthermore, the communication plug is fixed to the top of the upper shell by screws.

[0013] Furthermore, the communication plug is an aviation plug.

[0014] Furthermore, the lens enables the beam angle of the pulse wave emitted by the radio frequency board to be controlled within 8°.

[0015] Furthermore, the shell has a cylindrical shape.

[0016] Furthermore, the lower portion of the shell is reduced in diameter and provided with an external thread, and a locking nut is screwed onto the external thread.

[0017] Beneficial effects of the utility model:

[0018] 1. The radar flow sensor of the present invention mainly obtains the distance between the probe and the material on the belt by emitting pulses, and then calculates the material flow on the belt. Compared with traditional laser sensors, this radar flow sensor can be used stably for a long time in high dust and high water vapor environments. It is particularly suitable for measuring coal flow on coal mine belts.

[0019] 2. The radar flow sensor of the present invention has its main structures integrated in the shell, and a lens is arranged at the bottom. The arrangement of the lens can, on the one hand, protect the components inside the shell, avoid pollution from dust and water vapor, and increase the service life of the sensor; on the other hand, it can constrain the pulse wave beam of the radio frequency board to within 8°, so as to concentrate the measured energy.

[0020] 3. The structural design of the radar flow sensor of the present invention fully considers the convenience and speed of sensor assembly. The sensor structure and wires are very convenient to disassemble and assemble, which reduces processing and production costs and facilitates subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Attachment Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0022] Attachment Figure 2This is a schematic diagram of the cross-sectional structure of the utility model.

[0023] Attachment Figure 3 This is a schematic diagram of the lower shell structure of the utility model.

[0024] Attachment Figure 4 This is a schematic diagram of the lens structure of the utility model.

[0025] The numbers shown in the accompanying drawings are: 1. lower shell; 2. upper shell; 3. lens; 4. locking nut; 5. aviation plug; 6. RF board; 7. core processing board; 8. lens fixing screw; 9. copper stud; 10. limit table; 11. flange; 12. mounting ring; 13. RF board fixing screw. DETAILED DESCRIPTION

[0026] The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the contents of this invention, those skilled in the art may make various changes or modifications to the present invention, and that such equivalent forms also fall within the scope defined in this application.

[0027] This embodiment provides a radar material flow sensor, which is mainly used to measure the material flow on a belt.

[0028] refer to Figures 1-4 FIG2 is a schematic diagram of the structure of the radar flow sensor according to the embodiment of the present invention. In the embodiment of the present invention, the sensor mainly includes an upper shell 2, a lower shell 1, a lens 3, a radio frequency board 6, a core processing board 7 and an aviation plug 5.

[0029] The upper and lower housings 2 and 1 are both cylindrical and connected via a threaded quick-release connection. An aviation plug 5 is screwed to the top of the upper housing 1, allowing the sensor's signals to communicate with the outside world. The lower housing 1 is equipped with the corresponding lens 3, RF board 6, and core processing board 7.

[0030] refer to Figure 2 、 Figure 3 As shown in FIG, a through cavity is provided inside the lower shell 1 of this embodiment, and an annular limiting platform 10 is provided inside. Figure 4 As shown, the bottom of the lens 3 is a spherical structure, and a flange 11 is provided on the upper part. The lens 3 is installed from the opening at the top of the cavity. The flange 11 of the lens 3 is limited by the limit platform 10 inside the cavity and is fixed by multiple lens fixing screws 8. After the lens 3 is installed, its bottom extends to the outside of the lower shell 1, thereby closing the lower opening of the cavity.

[0031] refer to Figure 4As shown, the lens 3 has a mounting cavity with a mounting ring 12 inside. The RF board 6 is placed into the mounting ring 12 through the upper opening of the cavity and secured with RF board fixing screws 13. It should be noted that the RF board 6 should be installed at the focal point of the lens 3. In this way, the beam angle of the transmitted pulse wave is compressed to within 8° after passing through the lens 3, thus concentrating the measured energy.

[0032] In this embodiment, the core processing board 7 is mounted on the flange 11 of the lens 3 via copper studs 9 and connected to the RF board 6 via a flat cable. The aviation plug 5 is also connected to the core processing board 7 via a cable. The core processing board 7 sends instructions to the RF board 6. After receiving the transmit command, the RF board 6 transmits a pulse wave. After passing through the lens 3, the beam angle of the transmitted pulse wave is compressed to within 8°. The compressed pulse wave will reflect when it encounters the material. A portion of the reflected wave is received by the RF board 6, and the received signal is sent to the core processing board 7 for processing. The core processing board 7 signal is output through the aviation plug 5.

[0033] This embodiment also provides a specific implementation of the above-mentioned radar flow sensor, which is as follows.

[0034] 1. Install multiple radar flow sensors directly above the belt (adjust the number of sensors according to the width of the belt, and distribute the sensors evenly with a spacing of approximately 10 cm. Secure the sensors to the corresponding brackets with locking nuts 4 during installation).

[0035] 2. When the belt is empty, measure the distance between each sensor and the belt, calculate the cross-sectional area above the belt between any two sensors, and add up the cross-sectional areas to get the total area of the empty belt distance sensor.

[0036] 3. When the belt is waiting for material, measure the distance between each sensor and the material, calculate the cross-sectional area above the material between any two sensors, and add up the cross-sectional areas to get the total area of the material distance from the sensor;

[0037] 4. Subtract the above data to obtain the cross-sectional area of the material;

[0038] 5. Calculate the volume of material passing through the sensor per unit time, and finally obtain the weight of material passing through the sensor per unit time to obtain flow data.

Claims

1. A radar flow sensor, characterized in that: It includes a shell, a lens, a radio frequency board, a core processing board and a communication plug. A cavity is set inside the shell, and the lens is installed in the cavity. The lower end of the lens extends from the bottom of the shell. The radio frequency board and the core processing board are located in the cavity and fixed on the lens. The radio frequency board is located at the focus of the lens. The radio frequency board and the core processing board are connected by a cable, and the core processing board and the communication plug are connected by a cable.

2. The radar flow sensor according to claim 1, characterized in that: The shell includes an upper shell and a lower shell, and the upper shell and the lower shell are connected by threads or snaps. The lens, radio frequency board and core processing board are all installed in the lower shell, and the communication plug is installed in the upper shell.

3. The radar flow sensor according to claim 2, characterized in that: A limit platform is provided in the cavity of the lower shell, a flange is provided on the top of the lens, the lens is placed into the cavity through the opening at the upper end of the lower shell, the flange of the lens is pressed tightly against the limit platform and fastened by the lens fixing screws.

4. The radar flow sensor according to claim 3, characterized in that: A mounting cavity is provided inside the lens, a mounting ring is provided in the mounting cavity, and the radio frequency board is placed on the mounting ring in the mounting cavity through an opening at the top of the lens and fixed by screws.

5. The radar material flow sensor according to claim 4, characterized in that: The core processing board is fixed to the upper surface of the lens flange through copper studs.

6. The radar flow sensor according to claim 2, characterized in that: The communication plug is fixed to the top of the upper shell by screws.

7. The radar flow sensor according to claim 6, characterized in that: The communication plug is an aviation plug.

8. The radar flow sensor according to claim 1, characterized in that: The lens enables the beam angle of the pulse wave emitted by the radio frequency board to be controlled within 8°.

9. The radar flow sensor according to claim 1, characterized in that: The shell has a cylindrical shape.

10. The radar material flow sensor according to claim 9, characterized in that: The lower part of the shell is reduced in diameter and provided with an external thread, and a locking nut is screwed on the external thread.

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