Electromagnetic detector calibration device and use method thereof

Abstract

The present invention relates to the field of electromagnetic detection technology, and discloses an electromagnetic detector calibration device, comprising an electromagnetic field generator, a base and a turntable are provided below the electromagnetic field generator, a rotating mechanism is installed inside the base, the turntable is connected to the rotating mechanism, a plurality of arc grooves are radially distributed on the turntable, the arc grooves are all concentric with the turntable, adjacent arc grooves are connected by connecting grooves, the arc grooves and the connecting grooves are connected to form spiral grooves, a fixed frame is provided below the turntable, a slide rail is provided on the top of the fixed frame along the axial direction of the turntable, a slider is slidably connected in the slide rail, a positioning column is provided on the top of the slider, a placement block for placing the detector is provided above the turntable, the positioning column passes through the spiral groove and is fixedly connected to the bottom of the placement block, the device can quickly move the positioning column to the corresponding positioning point in sequence, thereby quickly completing the data collection of the electromagnetic intensity of the detector to be tested at that location, greatly reducing the time required for calibration, and improving the calibration efficiency.

Description

Technical Field

[0001] The present invention relates to a calibration device for an electromagnetic detector, in particular to a calibration device for an electromagnetic detector. Background Art

[0002] Electromagnetic radiation is the transfer of momentum and energy through space in the form of waves caused by co-directionally oscillating, mutually perpendicular electric and magnetic fields. These waves propagate perpendicular to the plane formed by the electric and magnetic fields. These interactions generate electromagnetic waves, which are then emitted or propagated into the air as electromagnetic radiation. These waves include power-frequency and radio-frequency electromagnetic fields. High-power electromagnetic radiation is harmful to the human body. Electromagnetic signals are invisible and cannot be sensed by the human body, so they must be measured using a detector equipped with an electromagnetic sensor.

[0003] When an electromagnetic detector is in use, the electromagnetic environment generated by the device itself can affect the electromagnetic sensor to a certain extent, causing the sensor's measurement results to deviate from the actual value. Therefore, the detector needs to be calibrated before leaving the factory to eliminate the deviation and correct the measurement results during actual use. During this calibration process, the detector's position must be changed multiple times to obtain sufficient detection values. Manually adjusting the detector requires a lot of manpower, so a calibration device that can automatically adjust the detector's position is needed. Summary of the Invention

[0004] In view of this, the technical problem to be solved by the present invention is to provide a calibration device that can quickly and automatically adjust the position of the detector.

[0005] The technical solution of the present invention is achieved as follows:

[0006] The present invention provides an electromagnetic detector calibration device, comprising an electromagnetic field generator for generating an electromagnetic field, a base and a turntable are provided below the electromagnetic field generator, a rotating mechanism is installed inside the base, the turntable is connected to the rotating mechanism, a plurality of arc grooves are distributed radially on the turntable, the arc grooves are all concentric with the turntable, adjacent arc grooves are connected by connecting grooves, the arc grooves and the connecting grooves are connected to form a spiral groove, a fixed frame is provided below the turntable, a slide rail is provided on the top of the fixed frame along the axial direction of the turntable, a slider is slidably connected in the slide rail, a positioning column is provided on the top of the slider, a placement block for placing the detector is provided above the turntable, the positioning column passes through the spiral groove and is fixedly connected to the bottom of the placement block.

[0007] Preferably, the rotating mechanism includes a driving motor, a controller and a signal receiver, the output shaft of the driving motor is coaxially connected to the turntable, the driving motor is connected to the controller, the controller is connected to the signal receiver, and the signal receiver is connected to an external handheld terminal.

[0008] Preferably, the length of the arc-shaped groove is greater than half of a concentric circle with the same diameter.

[0009] Preferably, the electromagnetic field generator includes a signal generating module for generating a signal source; a power amplifying module for amplifying the signal source into an amplified signal for sensor calibration; a magnetic field generating module for generating a corresponding AC magnetic field within the frequency range of the amplified signal generated by the power amplifying module; and an electric field generating module for generating an AC electric field within the frequency range of the amplified signal generated by the power amplifying module.

[0010] Preferably, the detector includes an electromagnetic sensor, a data acquisition module and a data transmission module, the electromagnetic sensor is connected to the data acquisition module, the data acquisition module is connected to the data transmission module, and the data transmission module is connected to an external terminal device signal.

[0011] Preferably, the external terminal device includes a data center for storing the calibration data to be processed of the electromagnetic sensor; a calibration terminal for parsing, obtaining and displaying the calibration data of the electromagnetic sensor.

[0012] A method for using an electromagnetic detector calibration device,

[0013] S1: Start the rotating mechanism to drive the turntable to rotate, use the spiral groove to move the positioning column and the slider along the slide rail to the outermost layer of the spiral groove, and then close the rotating mechanism;

[0014] S2: Place the detector on the placement block and fix the detector by the placement block;

[0015] S3: The electromagnetic field is set by the electromagnetic field generator. The electromagnetic intensity at the intersection of each arc groove on the turntable and the slide rail is known, and the electromagnetic intensity gradually weakens from the inside to the outside;

[0016] S4: Record the electromagnetic field strength value measured by the detector when it is in the outermost arc groove;

[0017] S5: Start the rotating mechanism to drive the turntable and the spiral groove to rotate. When the positioning post is located in the outermost arc groove, the position of the positioning post does not change. When the connecting groove of the spiral groove intersects with the positioning post, the inner wall of the spiral groove drives the positioning post to move toward the axis of the turntable. Driven by the slider, the positioning post reaches the second layer of arc groove. At this time, the rotating mechanism is closed, and the electromagnetic field strength value measured by the detector when it is in the second layer of arc groove is recorded.

[0018] S6: Repeat the above step S5, record the electromagnetic field strength value measured by the detector when it is located at each layer of the arc groove, and compare it with the standard strength value measured by the standard detector to calibrate the data of the detector.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention provides an electromagnetic detector calibration device. By setting an electromagnetic field and using a standard detector to measure the electromagnetic strength of three positioning points, when calibrating the detector to be inspected, it is only necessary to drive the turntable and the spiral groove to rotate through a rotating mechanism. When the connecting groove part in the spiral groove rotates to the side of the positioning column, the inner wall of the connecting groove will drive the positioning column to move into the adjacent arc groove. Since the arc groove is a local segment of a concentric circle, the arc groove part rotates to the side of the positioning column, and the positioning column does not move back and forth, so that the positioning column can be quickly moved to the three positioning points in sequence, thereby quickly completing the data collection of the electromagnetic strength of the detector to be inspected at that location, greatly reducing the time required for calibration, and improving calibration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of a calibration device for an electromagnetic detector according to the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of a base in a calibration device for an electromagnetic detector according to the present invention;

[0024] Figure 3 This is a partial exploded view of a calibration device for an electromagnetic detector according to the present invention;

[0025] Figure 4 This is a schematic diagram of the top surface structure of a turntable in a calibration device for an electromagnetic detector according to the present invention;

[0026] Figure 5 This is a schematic structural diagram of a positioning post in a calibration device for an electromagnetic detector according to the present invention when the positioning post contacts the connection groove;

[0027] Figure 6 This is a structural diagram of a calibration device for an electromagnetic detector according to the present invention when the positioning column moves to point ②;

[0028] Figure 7This is a structural diagram of a calibration device for an electromagnetic detector according to the present invention when the positioning column moves to point ③;

[0029] Figure 8 This is a system block diagram of an electromagnetic detector calibration device of the present invention.

[0030] In the figure, 1 is a base, 2 is a turntable, 3 is a spiral groove, 31 is an arc groove, 32 is a connecting groove, 4 is a fixing frame, 5 is a slide rail, 6 is a slider, 7 is a positioning column, 8 is a detector, 9 is a placement block, 10 is an outer layer, 11 is a middle layer, 12 is an inner layer, 13 is a driving motor, 14 is a controller, 15 is a signal receiver, 16 is an electromagnetic field generator, 17 is a signal generating module, 18 is a power amplifying module, 19 is a magnetic field generating module, 20 is an electric field generating module, 21 is an electromagnetic sensor, 22 is a data acquisition module, 23 is a data transmission module, 24 is an external terminal, 25 is a data center, and 26 is a calibration terminal. DETAILED DESCRIPTION

[0031] In order to better understand the technical content of the present invention, specific embodiments are provided below, and the present invention is further described in conjunction with the accompanying drawings.

[0032] See also Figures 1 to 8 The present invention provides a calibration device for an electromagnetic detector, comprising an electromagnetic field generator for generating an electromagnetic field, a base and a turntable are provided below the electromagnetic field generator, a rotating mechanism is installed inside the base, the turntable is connected to the rotating mechanism, a plurality of arc grooves are distributed radially on the turntable, the arc grooves are all concentric with the turntable, adjacent arc grooves are connected by connecting grooves, the arc grooves and the connecting grooves are connected to form a spiral groove, a fixed frame is provided below the turntable, a slide rail is provided on the top of the fixed frame along the axial direction of the turntable, a slider is slidably connected in the slide rail, a positioning column is provided on the top of the slider, a placement block for placing the detector is provided above the turntable, and the positioning column passes through the spiral groove and is fixedly connected to the bottom of the placement block.

[0033] In this embodiment, three layers of arc grooves, namely the outer layer, the middle layer and the inner layer, are taken as an example. The intersection of the outer arc groove and the slide rail is set as point ①, the intersection of the middle arc groove and the slide rail is set as point ②, and the intersection of the inner arc groove and the slide rail is set as point ③. By setting an electromagnetic field and using a standard detector to measure the electromagnetic intensity of the three positioning points ①, ②, and ③, when calibrating the detector to be inspected, it is only necessary to drive the turntable and the spiral groove to rotate through the rotating mechanism. When the connecting groove part in the spiral groove rotates to the side of the positioning column, the inner wall of the connecting groove will drive the positioning column to move into the adjacent arc groove. Since the arc groove is a partial segment of a concentric circle, the arc groove part rotates to the side of the positioning column, and the positioning column does not move back and forth, so that the positioning column can be quickly moved to the three positioning points ①, ②, and ③ in sequence, thereby quickly completing the data collection of the electromagnetic intensity at this point by the detector to be inspected, and comparing it with the standard intensity value measured by the standard detector, and calibrating the data of the detector to be inspected, greatly reducing the time required for calibration and improving calibration efficiency. And when the positioning column moves to the corresponding positioning point, the rotating mechanism can be closed to prevent the radiation brought by the rotating mechanism itself from affecting the collection results of the detector to be tested. The components used in this device are all made of materials with low dielectric constants, which reduces the impact on the detector to be tested.

[0034] The rotating mechanism includes a drive motor, a controller, and a signal receiver. The output shaft of the drive motor is coaxially connected to the turntable, which is connected to the controller, which is connected to the signal receiver, which is connected to an external handheld terminal. An operator standing outside the electromagnetic field can use the handheld terminal to send a signal to the signal receiver, turning the drive motor on and off via the controller.

[0035] The length of the arc-shaped groove is greater than half of a concentric circle of the same diameter, which can increase the time the positioning column remains at the positioning point when the turntable rotates.

[0036] The electromagnetic field generator includes a signal generating module for generating a signal source; a power amplifying module for amplifying the signal source into an amplified signal for sensor calibration; a magnetic field generating module for generating a corresponding AC magnetic field within the frequency range of the amplified signal generated by the power amplifying module; and an electric field generating module for generating an AC electric field within the frequency range of the amplified signal generated by the power amplifying module.

[0037] The detector includes an electromagnetic sensor, a data acquisition module and a data transmission module. The electromagnetic sensor is connected to the data acquisition module, the data acquisition module is connected to the data transmission module, and the data transmission module is connected to an external terminal device signal.

[0038] The external terminal device includes a data center for storing the calibration data to be processed of the electromagnetic sensor; and a calibration terminal for parsing, obtaining and displaying the calibration data of the electromagnetic sensor.

[0039] A method for using an electromagnetic detector calibration device,

[0040] S1: Start the rotating mechanism to drive the turntable to rotate, use the spiral groove to move the positioning column and the slider along the slide rail to the outermost layer of the spiral groove, and then close the rotating mechanism;

[0041] S2: Place the detector to be inspected on the placement block and fix the detector to be inspected by the placement block;

[0042] S3: The electromagnetic field is set up using an electromagnetic field generator. The electromagnetic intensity at three locations, ①, ②, and ③, on the turntable where the outer, middle, and inner arc grooves intersect with the slide rails is measured in advance using a standard detector. The electromagnetic intensity gradually weakens from the inside out.

[0043] S4: Record the electromagnetic field strength value measured at point ① when the detector to be tested is in the outer arc slot;

[0044] S5: Start the rotating mechanism to drive the turntable and the spiral groove to rotate. When the positioning post is in the outer arc groove, the position of the positioning post does not change. When the connecting groove of the spiral groove intersects with the positioning post, the inner wall of the spiral groove drives the positioning post to move toward the axis of the turntable. Driven by the slider, the positioning post reaches the middle arc groove. At this time, the rotating mechanism is closed and the electromagnetic field strength value measured by the detector at point ② when it is in the middle arc groove is recorded.

[0045] S6: Repeat the above step S5, record the electromagnetic field strength value measured by the detector at point ③ when the detector is in the inner arc groove, compare the data measured by the detector to be tested at the three positioning points ①, ②, and ③ with the standard strength value measured by the standard detector, and calibrate the data of the detector to be tested.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A calibration device for an electromagnetic detector, comprising an electromagnetic field generator for generating an electromagnetic field, characterized in that: A base and a turntable are provided below the electromagnetic field generator, a rotating mechanism is installed inside the base, the turntable is connected to the rotating mechanism, a plurality of arc grooves are distributed radially on the turntable, the arc grooves are all concentric with the turntable, adjacent arc grooves are connected by connecting grooves, the arc grooves and the connecting grooves are connected to form a spiral groove, a fixing frame is provided below the turntable, a slide rail is provided on the top of the fixing frame along the axial direction of the turntable, a slider is slidably connected in the slide rail, a positioning column is provided on the top of the slider, a placement block for placing a detector is provided above the turntable, the positioning column passes through the The spiral groove is fixedly connected to the bottom of the placement block; the rotating mechanism is started to drive the turntable and the spiral groove to rotate. When the positioning column is located in the outermost arc groove, the position of the positioning column does not change. When the connecting groove of the spiral groove intersects with the positioning column, the inner wall of the spiral groove drives the positioning column to move toward the axis of the turntable. Driven by the slider, the positioning column comes to the second layer of arc groove. At this time, the rotating mechanism is closed, and the electromagnetic field strength value measured by the detector when it is in the second layer of arc groove is recorded. Repeat the above steps, record the electromagnetic field strength value measured by the detector when it is in each layer of arc groove, and compare it with the standard strength value measured by the standard detector.

2. The electromagnetic detector calibration device according to claim 1, characterized in that: The rotating mechanism includes a driving motor, a controller and a signal receiver. The output shaft of the driving motor is coaxially connected to the turntable. The driving motor is connected to the controller. The controller is connected to the signal receiver. The signal receiver is connected to an external handheld terminal.

3. The electromagnetic detector calibration device according to claim 1, characterized in that: The length of the arc-shaped groove is greater than half of a concentric circle with the same diameter.

4. The electromagnetic detector calibration device according to claim 1, characterized in that: The electromagnetic field generator includes a signal generating module for generating a signal source; a power amplifying module for amplifying the signal source into an amplified signal for sensor calibration; a magnetic field generating module for generating a corresponding AC magnetic field within the frequency range of the amplified signal generated by the power amplifying module; and an electric field generating module for generating an AC electric field within the frequency range of the amplified signal generated by the power amplifying module.

5. The electromagnetic detector calibration device according to claim 4, characterized in that: The detector includes an electromagnetic sensor, a data acquisition module and a data transmission module. The electromagnetic sensor is connected to the data acquisition module, the data acquisition module is connected to the data transmission module, and the data transmission module is connected to an external terminal device signal.

6. The electromagnetic detector calibration device according to claim 5, characterized in that: The external terminal device includes a data center for storing the calibration data to be processed of the electromagnetic sensor; and a calibration terminal for parsing, obtaining and displaying the calibration data of the electromagnetic sensor.

7. A method for using an electromagnetic detector calibration device, characterized in that: S1: Start the rotating mechanism to drive the turntable to rotate, use the spiral groove to move the positioning column and the slider along the slide rail to the outermost layer of the spiral groove, and then close the rotating mechanism; S2: Place the detector on the placement block and fix the detector by the placement block; S3: The electromagnetic field is set by the electromagnetic field generator. The electromagnetic intensity at the intersection of each arc groove on the turntable and the slide rail is known, and the electromagnetic intensity gradually weakens from the inside to the outside; S4: Record the electromagnetic field strength value measured by the detector when it is in the outermost arc groove; S5: Start the rotating mechanism to drive the turntable and the spiral groove to rotate. When the positioning post is located in the outermost arc groove, the position of the positioning post does not change. When the connecting groove of the spiral groove intersects with the positioning post, the inner wall of the spiral groove drives the positioning post to move toward the axis of the turntable. Driven by the slider, the positioning post reaches the second layer of arc groove. At this time, the rotating mechanism is closed, and the electromagnetic field strength value measured by the detector when it is in the second layer of arc groove is recorded. S6: Repeat the above step S5, record the electromagnetic field strength value measured by the detector when it is located at each layer of the arc groove, and compare it with the standard strength value measured by the standard detector to calibrate the data of the detector.

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