CN218512614U - Calibrator of portable radio frequency field intensity instrument - Google Patents
Calibrator of portable radio frequency field intensity instrument Download PDFInfo
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- CN218512614U CN218512614U CN202222553263.8U CN202222553263U CN218512614U CN 218512614 U CN218512614 U CN 218512614U CN 202222553263 U CN202222553263 U CN 202222553263U CN 218512614 U CN218512614 U CN 218512614U
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- test hole
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Abstract
The utility model discloses a calibrator of portable radio frequency field intensity appearance, be provided with antenna probe test hole on the calibrator shell, including parallel double annular transmitting antenna module in the shell, radio frequency signal source module and assembly body, install transmitting antenna module in this calibrator's annular test hole, radio frequency signal source module in the calibrator is connected with transmitting antenna module electricity, and through parallel double annular transmitting antenna module radiation electromagnetic signal, can form a stable radio frequency electromagnetic field in the test hole, the field intensity appearance antenna probe that will be detected, insert perpendicularly in this calibrator's test hole, this calibrator can detect various electromagnetic field intensity appearance, detect the range interval of calibration at 1V/m ~ 10V/m, it is 0.5GHz ~ 2GHz to detect the frequency interval.
Description
Technical Field
The utility model belongs to the technical field of the electromagnetic field measurement and specifically relates to a portable calibration equipment that is applicable to on-the-spot electromagnetic radiation field intensity meter and detects.
Background
The electromagnetic radiation field intensity instrument is a common detection device widely applied to electromagnetic radiation environment monitoring and environmental protection of electromagnetic radiation health hazards, the device needs to be sent to a professional monitoring department with CNAS or CM international certification to carry out annual detection and calibration work, and the current common radio frequency electromagnetic field intensity detection devices are basically fixed large, medium and small laboratory devices or equipment, such as darkroom laboratories, TEM cells and the like, not only need to be configured with expensive signal sources, transmitting antennas and the like, but also cannot be quickly suitable for the simple detection and calibration work requirements of field intensity instruments on outdoor sites.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a small-size, low cost uses the detection and calibration equipment of convenient user's on-spot field strength appearance.
The technical proposal of the utility model is that;
a calibrator of a portable radio frequency field intensity meter comprises a plastic shell, wherein an antenna probe test hole is arranged on the shell, a parallel double-ring-shaped transmitting antenna module matched with the test hole and a radio frequency signal source module connected with the parallel double-ring-shaped transmitting antenna are arranged in the calibrator shell, and the calibrator is used for generating a uniform radio frequency electromagnetic field at the center of the antenna probe test hole and implementing detection and calibration work of the field intensity meter; the shell is provided with an alternating current adapter 12V power supply jack and a built-in direct current battery box bin for supplying power, a panel of the shell is also provided with a power switch connected with a radio frequency signal source module, a power supply indicating lamp hole and a calibration potentiometer which are matched for detection and calibration work, and a field intensity transmission standard field intensity meter which is required to be externally configured is arranged on the panel of the shell, and the standard field intensity meter is a transmission standard for calibrating a field intensity value by the calibrator.
Preferably, the calibrator adopts an electromagnetic space experiment method of the parallel double-loop transmitting antenna, and relatively uniform electromagnetic radiation field intensity of 1V/m-10V/m can be formed in a small part of the geometric center of the parallel double-loop transmitting antenna by selecting and adjusting the diameter of loops of the double-loop antenna and adjusting the distance between the parallel double-loops.
Preferably, the diameter of the calibrator test hole can be adjusted to adapt to the current field intensity meter antenna probes of various brands.
Preferably, the antenna probe test hole is designed on the front side of the calibrator, so that the calibrated field intensity meter probe is vertically inserted into the test hole of the calibrator, and the detected field intensity meter is rotated 360 degrees along the axial direction of the probe, so that the isotropic technical index of the antenna probe can be detected.
Preferably, the output amplitude of the radio frequency signal source in the calibrator is controlled by adopting a tuning potentiometer method, and the amplitude of the calibration field intensity can be selected at will between 1V/m and 10V/m.
The utility model has the advantages and the beneficial effects
The utility model provides an assembly body structure of calibrator is succinct, and is practical convenient, and calibration field intensity is more stable, the indoor outer scene of especially adapted, the probe calibration work of multiple brand field intensity appearance.
The utility model discloses a detection and calibration target of handy on-spot electromagnetic field intensity appearance.
Drawings
FIG. 1 is an electrical schematic block diagram of the present invention;
FIG. 2 is a schematic view of an assembly of the present invention;
FIG. 3 is a schematic diagram of the test of the antenna probe to be tested inserted into the test hole of the calibrator;
fig. 4 is an isotropic detection schematic diagram of the detected antenna probe of the present invention.
Detailed Description
A calibrator for portable radio frequency field intensity instrument is designed according to the requirements of government management documents of "the instrument should be checked before and after each monitoring and the instrument is ensured to be in a normal working state" of quality assurance requirements in section 5 of the electromagnetic radiation environment monitoring method of 5G mobile communication base station published by the ministry of ecological environment of China document HJ 1151-2020.
The various embodiments of the object, technical solutions and advantages of the present invention will be further described with reference to the schematic structural diagram of the assembly of the calibrator according to the present invention shown in fig. 2.
To achieve the design goal of portability, the calibrator has a simple design structure in the shape of a square brick, as shown in fig. 2. The device comprises a plastic shell 1, wherein an antenna probe test hole 3 is formed in the front face 11 of the shell 1, a parallel double-ring-shaped transmitting antenna module 2 matched with the test hole and a radio frequency signal source module 4 connected with the parallel double-ring-shaped transmitting antenna are arranged in the shell, and the device is used for generating a uniform radio frequency electromagnetic field in the center of the antenna probe test hole and carrying out detection and calibration work on a field intensity meter; the calibrator shell comprises an alternating current adapter hole 5 and a 6-volt battery box bin 6 for supplying power, a power switch 7, a power indicator lamp hole 8 and a field intensity calibration potentiometer 9 which are connected with the radio frequency signal source module 4, and 4-section 5 batteries can be installed in the battery box bin 6. The loop test antenna module 2 is electrically connected to a radio frequency signal source 4 as shown in fig. 1.
In this embodiment, with the radio frequency signal source module that parallel double annular transmitting antenna module and equipment were debugged, the battery box storehouse is installed the utility model discloses in the plastic casing of calibrator.
In this embodiment, the primary detection condition is to establish a field intensity transfer standard, and as shown in fig. 2, a reliable and stable electromagnetic field intensity meter 10 must be selected as the standard field intensity meter of the field intensity transfer standard, the test frequency range and the detection field intensity range of the standard field intensity meter completely cover the detection design nominal range of the calibrator, the standard field intensity meter is sent to the national measurement institute for calibration, and the calibration factor of the measurement institute is used as the field intensity transfer standard, and the standard field intensity meter is the detection and calibration basis of the calibrator.
The calibration procedure in this embodiment:
1. after the power switch 7 is turned on, the radio frequency signal source module 4 generates a radio frequency signal with the frequency of 1GHz and the level of more than 5dbm, and the radio frequency signal with the fixed frequency and the level is transmitted to the parallel double-ring electromagnetic radiation antenna module 2 through the radio frequency signal source module 4, so that a radio frequency radiation electromagnetic field is formed in the test hole 3 of the calibrator, and the field intensity meter to be tested can be detected and calibrated.
2. The electromagnetic field strength value of the design nominal value of the calibrator, namely 5V/m or 10V/m, is established, the antenna probe of the standard field strength meter 10 after being metered by the national measurement institute is correctly inserted into the antenna probe test hole 3 of the calibrator, and the screw of the potentiometer 9 is calibrated by adjusting the field strength on the calibrator, so that the reading value of the display of the standard field strength meter 10 meets the design nominal value of the calibrator, namely 5V/m or 10V/m field strength value, namely, the metering transmission work of the standard field strength is completed, and the calibrator has the detection or calibration working conditions for other field strength meters to be detected.
3. The detection method comprises the steps that after the power supply 7 of the calibrator is started to work, a relatively stable 5V/m or 10V/cm electromagnetic field is formed in the antenna probe testing hole of the calibrator, the antenna probe of the field intensity meter to be detected and calibrated is correctly inserted into the testing hole 3 of the calibrator, the field intensity test reading on the display of the field intensity meter to be detected is read, and then the detection work of the field intensity meter to be detected is completed.
If the detected value of the detected field intensity meter is in accordance with the calibration value of the design field intensity nominal value of the calibrator of 5V/m or 10V/m, the calibrated field intensity meter is qualified.
In this embodiment, the antenna probe of the field strength meter should be inserted perpendicularly into the test hole of the calibrator, see fig. 3.
In this embodiment, the calibrator can detect the "isotropy" of the magnetometer probe as shown in fig. 4.
In this embodiment, the calibration RF frequency of the calibrator is set to 1GHz and the calibration electromagnetic radiation field strength is 5V/m or 10V/m according to market and equipment conditions.
In this embodiment, the dc power supply is 6V, and the output level of the rf signal source module is greater than 5dBm.
The above-described embodiments are only preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. A calibrator of a portable radio frequency field intensity meter comprises a shell (1), and is characterized in that an antenna probe test hole (3) is arranged on the shell, a parallel double-ring-shaped transmitting antenna module (2) matched with the test hole and a radio frequency signal source module (4) connected with the parallel double-ring-shaped transmitting antenna are arranged in the shell, and the calibrator is used for generating a uniform radio frequency electromagnetic field at the center of the antenna probe test hole and implementing detection and calibration work of the field intensity meter; the calibrator is characterized in that an alternating current adapter hole (5) and a battery box bin (6) which are connected with an external alternating current power supply are arranged on the calibrator shell, and a power control switch, a power indicator lamp and a calibration potentiometer which are connected with a radio frequency signal source module are arranged on a shell panel and are matched for detection and calibration.
2. The calibrator for the portable radio frequency field intensity meter according to claim 1, wherein the parallel dual-ring transmitting antenna module (2) is composed of parallel dual-surrounding electrical wires, a radio frequency current can flow through the electrical wires to generate a radio frequency electromagnetic field for the field intensity meter, and the ring diameter of the dual-ring transmitting antenna and the wire diameter parameters of the electrical wires should be matched with the calibration frequency of the radio frequency signal source to achieve a better radio frequency impedance matching, so as to achieve a better antenna transmitting electromagnetic field effect.
3. Calibrator of portable radio frequency field strength tester according to claim 1, characterized in that the antenna probe test hole (3) is provided on the front face (11) of the housing (1), and the tested field strength tester probe is inserted into the calibrator test hole in a vertical manner for testing.
4. The calibrator for the portable radio frequency field strength instrument according to claim 1, wherein the calibration amplitude region of the electromagnetic field strength of the calibrator is 1V/m to 10V/m, and the monitoring frequency point region is 0.5GHz to 2GHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222553263.8U CN218512614U (en) | 2022-09-27 | 2022-09-27 | Calibrator of portable radio frequency field intensity instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222553263.8U CN218512614U (en) | 2022-09-27 | 2022-09-27 | Calibrator of portable radio frequency field intensity instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218512614U true CN218512614U (en) | 2023-02-21 |
Family
ID=85214161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222553263.8U Active CN218512614U (en) | 2022-09-27 | 2022-09-27 | Calibrator of portable radio frequency field intensity instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218512614U (en) |
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2022
- 2022-09-27 CN CN202222553263.8U patent/CN218512614U/en active Active
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