CN115201579A - Electromagnetic radiation instrument for interference reproduction - Google Patents

Electromagnetic radiation instrument for interference reproduction Download PDF

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Publication number
CN115201579A
CN115201579A CN202210718692.8A CN202210718692A CN115201579A CN 115201579 A CN115201579 A CN 115201579A CN 202210718692 A CN202210718692 A CN 202210718692A CN 115201579 A CN115201579 A CN 115201579A
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circuit
electromagnetic radiation
radiation interference
interference
antenna
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吴永亮
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Acoustic Life Science Co ltd
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Acoustic Life Science Co ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/08—Measuring electromagnetic field characteristics
    • G01R29/0807—Measuring electromagnetic field characteristics characterised by the application
    • G01R29/0814—Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
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Abstract

The application discloses an electromagnetic radiation appearance for disturbing recurrence includes: the device comprises a control circuit, a transmitting circuit, an acquisition circuit, a selection switch and an antenna; the selection switch is used for connecting the antenna with the transmitting circuit or connecting the antenna with the acquisition circuit; the transmitting circuit is used for transmitting electromagnetic radiation interference; the acquisition circuit is used for acquiring electromagnetic radiation interference; the control circuit is used for storing the electromagnetic radiation interference collected by the collecting circuit and controlling the transmitting circuit to transmit and collect the electromagnetic radiation interference in the same frequency band as the electromagnetic radiation interference. This electromagnetic radiation appearance can reproduce electromagnetic radiation interference, is convenient for pertinence to the EMS performance of instrument carry out the rectification, reduces artifical and time cost simultaneously.

Description

Electromagnetic radiation instrument for interference reproduction
Technical Field
The application relates to the technical field of electromagnetic radiation, in particular to an electromagnetic radiation instrument for interference reproduction.
Background
Electromagnetic radiation interference propagates in the form of electromagnetic waves, and interference energy is emitted to the surrounding space according to the rule of an electromagnetic field, so that the normal use of equipment is influenced. Manufacturers of ultrasonic imaging instruments often encounter situations where the product can be normally operated on a production line, but in an actual use environment (such as a hospital), the instruments are abnormally imaged due to the existence of unpredictable electromagnetic radiation interference. This electromagnetic interference is often due to the complex electromagnetic environment of the hospital. For example, other electronic devices or fluorescent lamps without EMC (Electromagnetic Compatibility) requirements interfere with the Electromagnetic radiation of the instrument. And the environments of hospitals are very different, and a uniform standard is difficult to set.
At present, when manufacturers of ultrasonic imaging instruments encounter that the instruments cannot work normally due to poor performance of the EMS (Electro Magnetic sensitivity), after-sales engineers usually go to the field to directly modify the instruments, and aiming at improving the EMS performance of the products within hours is expected. However, the rectification within a short time is often hasty and blindness, which cannot fundamentally solve the problem of poor performance of the EMS, and also takes up the service time of the user.
Therefore, how to conveniently and purposefully modify the EMS performance of an instrument and reduce labor and time costs has become a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The utility model aims at providing an electromagnetic radiation appearance for disturbing recurrence can recurrence electromagnetic radiation interference, is convenient for pertinence to the EMS performance of instrument and rectifies, reduces artifical and time cost simultaneously.
In order to solve the above technical problem, the present application provides an electromagnetic radiation meter for interference reproduction, including:
the device comprises a control circuit, a transmitting circuit, an acquisition circuit, a selection switch and an antenna;
the selection switch is used for connecting the antenna with the transmitting circuit or connecting the antenna with the acquisition circuit;
the transmitting circuit is used for transmitting electromagnetic radiation interference;
the acquisition circuit is used for acquiring electromagnetic radiation interference;
the control circuit is used for storing the electromagnetic radiation interference collected by the collecting circuit and controlling the transmitting circuit to transmit and collect the electromagnetic radiation interference in the same frequency band as the electromagnetic radiation interference.
Optionally, the control circuit includes an FPGA.
Optionally, the transmitting circuit includes:
the D/A conversion circuit is used for carrying out digital-to-analog conversion on the signal output by the control circuit;
the low-pass filter circuit is used for filtering the signals subjected to digital-to-analog conversion;
and the power amplification circuit is used for performing power amplification processing on the signal subjected to the filtering processing of the low-pass filtering circuit.
Optionally, the acquisition circuit includes:
the frequency selection network is used for filtering the electromagnetic radiation interference received by the antenna;
the amplitude amplification circuit is used for carrying out amplitude amplification processing on the electromagnetic radiation interference subjected to filtering processing;
and the A/D conversion circuit is used for performing analog-to-digital conversion on the electromagnetic radiation interference subjected to the amplitude amplification processing.
Optionally, the frequency selective network includes:
the circuit comprises a first resistor, a second resistor, a first adjustable capacitor and a second adjustable capacitor;
one end of the first resistor is grounded, the other end of the first resistor is connected with one end of the second resistor and one end of the first adjustable capacitor, the other end of the second resistor is connected with one end of the second adjustable capacitor, the other end of the second adjustable capacitor is grounded, the other end of the first adjustable capacitor and one end of the first resistor, which is grounded, are used as the input end of the frequency-selecting network, and the two ends of the second adjustable capacitor are used as the output end of the frequency-selecting network.
Optionally, the selection switch is a single-pole double-throw switch.
Optionally, the control circuit, the transmitting circuit, the collecting circuit and the selection switch are disposed in a shielding box.
Optionally, the shielding box body includes a display interface and a control button.
The electromagnetic radiation meter for interference reproduction that this application provided includes: the device comprises a control circuit, a transmitting circuit, an acquisition circuit, a selection switch and an antenna; the selection switch is used for connecting the antenna with the transmitting circuit or connecting the antenna with the acquisition circuit; the transmitting circuit is used for transmitting electromagnetic radiation interference; the acquisition circuit is used for acquiring electromagnetic radiation interference; the control circuit is used for storing the electromagnetic radiation interference acquired by the acquisition circuit and controlling the emission circuit to emit and acquire the electromagnetic radiation interference in the same frequency band as the electromagnetic radiation interference.
Therefore, the electromagnetic radiation instrument for interference reproduction, which is provided by the application, collects electromagnetic radiation interference acquisition and emission functions and integrates the electromagnetic radiation interference acquisition and emission functions, can acquire and store electromagnetic radiation interference, and can reproduce the electromagnetic radiation interference. Therefore, by using the electromagnetic radiation instrument, electromagnetic radiation interference in a use place can be collected and stored, and electromagnetic radiation interference in the use place is reproduced at other places as an interference source, so that the use time of a user is not required to be occupied, targeted EMS performance correction can be performed, and labor and time costs are reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the prior art and the embodiments are briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a first electromagnetic radiation apparatus provided in an embodiment of the present application;
fig. 2 is a schematic diagram of a selection switch provided in an embodiment of the present application;
FIG. 3 is a schematic diagram of a second electromagnetic radiation apparatus provided by an embodiment of the present application;
fig. 4 is a schematic diagram of a band-pass filter according to an embodiment of the present application.
Detailed Description
The core of the application is to provide an electromagnetic radiation appearance for disturbing recurrence, can reproduce electromagnetic radiation interference, and the targeted EMS performance to the instrument of being convenient for is rectified and improved, reduces artifical and time cost simultaneously.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a schematic diagram of an electromagnetic radiation apparatus for interference reproduction according to an embodiment of the present application, and referring to fig. 1, the electromagnetic radiation apparatus includes:
a control circuit 10, a transmitting circuit 20, an acquisition circuit 30, a selection switch 40 and an antenna 50;
the selection switch 40 is configured to connect the antenna 50 with the transmitting circuit 20, or connect the antenna 50 with the collecting circuit 30;
the transmitting circuit 20 is used for transmitting electromagnetic radiation interference;
the acquisition circuit 30 is used for acquiring electromagnetic radiation interference;
the control circuit 10 is configured to store the electromagnetic radiation interference collected by the collection circuit 30, and control the transmission circuit 20 to transmit the electromagnetic radiation interference in the same frequency band as the electromagnetic radiation interference collected.
The electromagnetic radiation instrument provided by the embodiment mainly comprises a control circuit 10, a transmitting circuit 20, an acquisition circuit 30, a selection switch 40 and an antenna 50. In addition, the electromagnetic radiation instrument also comprises a power supply. On the basis that the power supply supplies power to the control circuit 10, the transmitting circuit 20 and the acquisition circuit 30, the control circuit 10, the transmitting circuit 20, the acquisition circuit 30, the selection switch 40 and the antenna 50 cooperate with each other to realize the acquisition and reproduction of electromagnetic radiation interference. In order to avoid the influence of the power supply on the electromagnetic radiation effect of the electromagnetic radiation instrument, the power supply is preferably a battery, such as a lithium battery.
Specifically, the antenna 50 may be used as a transmitting antenna, and may also be used as a receiving antenna. When the selection switch 40 connects the antenna 50 with the transmission circuit 20, the antenna 50 serves as a transmission antenna and is responsible for transmitting electromagnetic radiation interference. When the selection switch 40 connects the antenna 50 with the acquisition circuit 30, the antenna 50 serves as a receiving antenna and is responsible for receiving electromagnetic radiation interference.
Wherein, in some embodiments, the selection switch 40 is a single pole double throw switch.
Referring to fig. 2, the moving terminal (e.g., one terminal indicated by reference numeral 2 in fig. 2) of the single-pole double-throw switch is connected to the antenna 50, one fixed terminal (e.g., one terminal indicated by reference numeral 3 in fig. 2) of the single-pole double-throw switch is connected to the output terminal (e.g., TX in fig. 2) of the transmitting circuit 20, and the other fixed terminal (e.g., one terminal indicated by reference numeral 1 in fig. 2) of the single-pole double-throw switch is connected to the input terminal (e.g., RX in fig. 2) of the acquiring circuit 30.
When the movable end 2 is connected to the stationary end 3, the antenna 50 functions as a transmitting antenna 50, and when the movable end 2 is connected to the stationary end 1, the antenna 50 functions as a receiving antenna 50.
The collecting circuit 30 is responsible for collecting the electromagnetic radiation interference and further storing the collected electromagnetic radiation interference in the memory of the control circuit 10.
Referring to fig. 3, in some embodiments, the acquisition circuit 30 includes:
a frequency-selective network, configured to perform filtering processing on electromagnetic radiation interference received by the antenna 50;
the amplitude amplification circuit is used for carrying out amplitude amplification processing on the electromagnetic radiation interference subjected to filtering processing;
and the A/D conversion circuit is used for performing analog-to-digital conversion on the electromagnetic radiation interference subjected to the amplitude amplification processing.
The frequency selection network, the amplitude amplification circuit and the A/D conversion circuit are arranged along the signal transmission direction in sequence. The frequency-selective network is responsible for filtering the electromagnetic radiation interference received by the antenna 50 to filter out useless low-frequency and high-frequency signals and retain signals in the same frequency band as the electronic device to be interfered. Because the collected interference is often weak in signal, the embodiment further provides an amplitude amplification circuit, the filtered signal enters the amplitude amplification circuit for amplitude amplification, the signal after amplitude amplification is subjected to analog-to-digital conversion by the a/D conversion circuit, and finally the signal after analog-to-digital conversion is input to the control circuit 10 for storage.
For the amplitude amplifying circuit and the a/D conversion circuit, any conventional circuit structure may be referred to, and details are not repeated herein.
For a frequency selective network, as shown with reference to fig. 4, in some embodiments, the frequency selective network comprises:
the circuit comprises a first resistor R1, a second resistor R2, a first adjustable capacitor C1 and a second adjustable capacitor C2;
one end of the first resistor R1 is grounded, the other end of the first resistor R1 is connected with one end of the second resistor R2 and one end of the first adjustable capacitor C1, the other end of the second resistor R2 is connected with one end of the second adjustable capacitor C2, the other end of the second adjustable capacitor C2 is grounded, the other end of the first adjustable capacitor C1 and one end of the first resistor R1 which is grounded are used as the input end of the frequency selection network, and the two ends of the second adjustable capacitor C2 are used as the output end of the frequency selection network.
In this embodiment, the frequency selection network is a band-pass filter with adjustable frequency, and the size of the first adjustable capacitor C1 and/or the second adjustable capacitor C2 in the band-pass filter is adjusted to selectively filter out useless low-frequency and high-frequency signals and leave signals in the same frequency band as the electronic device to be interfered. Wherein, the upper and lower cut-off frequencies of the same frequency band are respectively:
Figure BDA0003710472570000051
and
Figure BDA0003710472570000052
f L denotes the lower cut-off frequency, f H The upper cut-off frequency is indicated.
The sizes of the first resistor R1, the second resistor R2, the first adjustable capacitor C1 and the second adjustable capacitor C2 can be set adaptively according to the required upper and lower cut-off frequencies.
For example,the first resistor R1=1k Ω, the first adjustable capacitor C1= 1-20 pF adjustable, the second resistor R2=100k Ω, and the second adjustable capacitor C2= 1-20 pF adjustable, so as to realize at least a lower cut-off frequency f L Adjustable upper cut-off frequency f at 100KHz to 1MHz H Adjustable between 10MHz and 100 MHz.
The transmitting circuit 20 is used for transmitting electromagnetic radiation interference.
Referring to fig. 3, in some embodiments, the transmit circuit 20 includes:
a D/a conversion circuit for performing digital-to-analog conversion on the signal output by the control circuit 10;
the low-pass filter circuit is used for filtering the signals subjected to digital-to-analog conversion;
and the power amplifying circuit is used for performing power amplification processing on the signal filtered by the low-pass filter circuit.
Along the signal transmission direction, the digital-to-analog converter circuit, the low-pass filter circuit and the power amplifier circuit are arranged in sequence. The signal output by the control circuit 10 is firstly subjected to digital-to-analog conversion by the D/a conversion circuit, the signal obtained by the digital-to-analog conversion is further subjected to filtering processing by the low-pass filter circuit, and finally the signal subjected to the filtering processing by the low-pass filter circuit is subjected to power amplification processing by the power amplification circuit and is transmitted by the antenna 50. The gain of the power amplifier circuit may be controlled by the control circuit 10, and the control circuit 10 may control the intensity of the emitted electromagnetic radiation interference by controlling the power amplifier circuit.
For the power amplifying circuit, the D/a converting circuit and the low-pass filtering circuit, any conventional circuit structure may be referred to, and details are not repeated herein.
The control circuit 10 stores the electromagnetic radiation interference collected by the collecting circuit 30, and controls the transmitting circuit 20 to transmit the electromagnetic radiation interference in the same frequency band as the collected electromagnetic radiation interference, so as to realize interference reproduction. The frequency of the emitted electromagnetic radiation interference is determined by the frequency of the signal output by the control circuit.
Therefore, the electromagnetic radiation instrument can collect and store electromagnetic radiation interference of a specific frequency band in each use place, and can reproduce the electromagnetic radiation interference in other places, such as research and development laboratories of manufacturers. Furthermore, manufacturers can also establish an electromagnetic radiation interference database for testing the EMS performance of subsequent products, so that the complexity of repeated rectification is reduced, and the product competitiveness is improved.
Referring to fig. 3, in some embodiments, the control circuit 10 includes an FPGA (Field-Programmable Gate Array).
It will be appreciated that the FPGA provided in the above embodiment is an implementation of the control circuit 10, and is not limited to being the only implementation, and may be other types of devices capable of performing the functions of the control circuit 10 in this application. Such as a single chip microcomputer.
Further, on the basis of the above embodiments, in some embodiments, the control circuit 10, the transmitting circuit 20, the collecting circuit 30 and the selection switch 40 are disposed in a shielding box.
Specifically, the control circuit 10, the transmitting circuit 20, the collecting circuit 30 and the selection switch 40 may be integrated on a PCB board disposed in the shielding box, so as to ensure that the electromagnetic radiation emitting device only emits electromagnetic radiation interference through the antenna 50.
Further, on the basis of the above embodiments, in some embodiments, the box body of the shielding box includes a display interface and a control key.
In this embodiment, the shielding box is provided with a display interface and a control key. The control keys may include an acquisition control key, an emission control key, an intensity setting key, a frequency setting key, and the like. When the acquisition control key is pressed, the electromagnetic radiation instrument is started to start to acquire electromagnetic radiation interference. When the emission control key is pressed, the electromagnetic radiation instrument is started to emit electromagnetic radiation interference. The frequency of the electromagnetic radiation interference to be emitted can be set by the frequency setting key, and the intensity of the electromagnetic radiation interference to be emitted can be set by the intensity setting key. The information such as the set frequency, intensity and the like can be displayed through the display interface.
In summary, the electromagnetic radiation meter provided by the present application includes: the device comprises a control circuit, a transmitting circuit, an acquisition circuit, a selection switch and an antenna; the selection switch is used for connecting the antenna with the transmitting circuit or connecting the antenna with the acquisition circuit; the transmitting circuit is used for transmitting electromagnetic radiation interference; the acquisition circuit is used for acquiring electromagnetic radiation interference; the control circuit is used for storing the electromagnetic radiation interference collected by the collecting circuit and controlling the transmitting circuit to transmit and collect the electromagnetic radiation interference in the same frequency band as the electromagnetic radiation interference. It is thus clear that the electromagnetic radiation appearance that this application provided collects electromagnetic radiation interference collection and emission function and an organic whole, can gather, save electromagnetic radiation interference to electromagnetic radiation interference can reproduce. Therefore, by using the electromagnetic radiation instrument, electromagnetic radiation interference in a use place can be collected and stored, and electromagnetic radiation interference in the use place is reproduced at other places as an interference source, so that the use time of a user is not required to be occupied, targeted EMS performance correction can be performed, and labor and time costs are reduced.
Because the situation is complicated and cannot be illustrated by a list, those skilled in the art can appreciate that there can be many examples in combination with the actual situation under the basic principle of the embodiments provided in the present application and that it is within the scope of the present application without sufficient inventive effort.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The electromagnetic radiation meter for interference reproduction provided by the present application is described in detail above. The principles and embodiments of the present application are described herein using specific examples, which are only used to help understand the method and its core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

Claims (8)

1. An electromagnetic radiation meter for interference reconstruction, comprising:
the device comprises a control circuit, a transmitting circuit, an acquisition circuit, a selection switch and an antenna;
the selection switch is used for connecting the antenna with the transmitting circuit or connecting the antenna with the acquisition circuit;
the transmitting circuit is used for transmitting electromagnetic radiation interference;
the acquisition circuit is used for acquiring electromagnetic radiation interference;
the control circuit is used for storing the electromagnetic radiation interference acquired by the acquisition circuit and controlling the emission circuit to emit and acquire the electromagnetic radiation interference in the same frequency band as the electromagnetic radiation interference.
2. The electromagnetic radiometer of claim 1, wherein the control circuitry comprises an FPGA.
3. The electromagnetic radiometer of claim 2, wherein the transmit circuit comprises:
the D/A conversion circuit is used for carrying out digital-to-analog conversion on the signal output by the control circuit;
the low-pass filter circuit is used for filtering the signals subjected to digital-to-analog conversion;
and the power amplification circuit is used for performing power amplification processing on the signal subjected to the filtering processing of the low-pass filtering circuit.
4. The electromagnetic radiometer of claim 1, wherein the acquisition circuit comprises:
the frequency-selecting network is used for filtering the electromagnetic radiation interference received by the antenna;
the amplitude amplification circuit is used for carrying out amplitude amplification processing on the electromagnetic radiation interference subjected to filtering processing;
and the A/D conversion circuit is used for carrying out analog-to-digital conversion on the electromagnetic radiation interference subjected to amplitude amplification processing.
5. The electromagnetic radiometer of claim 4, wherein the frequency selective network comprises:
the circuit comprises a first resistor, a second resistor, a first adjustable capacitor and a second adjustable capacitor;
one end of the first resistor is grounded, the other end of the first resistor is connected with one end of the second resistor and one end of the first adjustable capacitor, the other end of the second resistor is connected with one end of the second adjustable capacitor, the other end of the second adjustable capacitor is grounded, the other end of the first adjustable capacitor and one end of the first resistor, which is grounded, are used as the input end of the frequency-selecting network, and the two ends of the second adjustable capacitor are used as the output end of the frequency-selecting network.
6. The electromagnetic radiometer of claim 1, wherein the selection switch is a single pole double throw switch.
7. The electromagnetic radiometer of claim 6, wherein the control circuit, the transmit circuit, the collection circuit, and the selection switch are disposed within a shielded box.
8. The electromagnetic radiation meter of claim 7, wherein the housing of the shielding housing includes a display interface and control buttons.
CN202210718692.8A 2022-06-23 2022-06-23 Electromagnetic radiation instrument for interference reproduction Pending CN115201579A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210718692.8A CN115201579A (en) 2022-06-23 2022-06-23 Electromagnetic radiation instrument for interference reproduction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210718692.8A CN115201579A (en) 2022-06-23 2022-06-23 Electromagnetic radiation instrument for interference reproduction

Publications (1)

Publication Number Publication Date
CN115201579A true CN115201579A (en) 2022-10-18

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Application Number Title Priority Date Filing Date
CN202210718692.8A Pending CN115201579A (en) 2022-06-23 2022-06-23 Electromagnetic radiation instrument for interference reproduction

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