CN215894795U - Blockage test system - Google Patents
Blockage test system Download PDFInfo
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- CN215894795U CN215894795U CN202122234410.0U CN202122234410U CN215894795U CN 215894795 U CN215894795 U CN 215894795U CN 202122234410 U CN202122234410 U CN 202122234410U CN 215894795 U CN215894795 U CN 215894795U
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Abstract
The utility model discloses a blockage testing system, comprising: the signal generator, the attenuator, the amplifier and the blockage test antenna are connected in sequence, and the signal generator sends out radio frequency signals; the attenuator is used for reducing the radio frequency signal emitted by the signal generator; the amplifier is used for amplifying the radio frequency signal sent by the attenuator; the blockage test antenna is used for converting the radio-frequency signal sent by the amplifier into a magnetic field signal to be provided for an object to be tested which is placed near the blockage test antenna to carry out blockage test. The attenuator in this application reduces the radio frequency signal that signal generator sent, avoids appearing the phenomenon of signal distortion. The amplifier amplifies the radio frequency signal output by the attenuator, so that the blocking test antenna can receive and utilize the radio frequency signal to generate a magnetic field signal, the attenuator and the amplifier are matched with each other to protect the signal generator from continuously running in a high-power state, the blocking test result of an object to be tested can be more accurate, the attenuator can also provide impedance matching, and the change of impedance is relieved.
Description
Technical Field
The utility model relates to the technical field of wireless power transmission, in particular to a congestion testing system.
Background
Along with the development of society, people have higher and higher requirements on the quality of power supplies, and the power supplies are required to have the characteristics of portability, safety, high efficiency, environmental protection and the like. However, wireless charging products may cause unpredictable abnormalities after being subjected to external electromagnetic interference, which may cause damage to the products and even endanger the property and life safety of users. Therefore, how to ensure that wireless charging products can continuously and stably work normally in a complex electromagnetic environment becomes the focus of attention of all countries in the world. Active measures are taken by developed countries and related international organizations, electronic electromagnetic compatibility standards and related regulations of wireless charging products are strengthened, and even the wireless charging products are listed in a market admission system to form a technical barrier of trade.
The existing blockage test system is characterized in that a signal generator is directly connected with a blockage test antenna, and in the process of transmitting a radio-frequency signal output by the signal generator to the blockage test antenna, the problem that the radio-frequency signal output by the signal generator is distorted due to overlarge radio-frequency signal output by the signal generator is easily caused, so that the test result of a subsequent blockage test of an object to be tested is influenced.
SUMMERY OF THE UTILITY MODEL
In view of the above, there is a need for a jamming test system that can avoid signal distortion of the rf signal generated by the signal generator during transmission.
A jam testing system comprising: the device comprises a signal generator, an attenuator, an amplifier and a blockage test antenna which are sequentially connected, wherein the signal generator sends out radio frequency signals; the attenuator is used for reducing the radio frequency signal emitted by the signal generator; the amplifier is used for amplifying the radio frequency signal emitted by the attenuator; the blockage test antenna is used for converting the radio frequency signal sent by the amplifier into a magnetic field signal so as to provide the magnetic field signal for an object to be tested which is placed near the blockage test antenna to carry out blockage test.
In one embodiment, the jamming test system further comprises an antenna spring wound on the jamming test antenna, wherein the antenna spring is used for increasing the gain of the jamming test antenna and reducing the standing wave of the jamming test antenna.
In one embodiment, the number of the antenna springs is multiple, and the antenna springs are arranged on the blockage test antenna at intervals.
In one embodiment, the number of turns of the antenna spring is adjustable.
In one embodiment, the blockage test system further comprises a spectrometer connected to the blockage test antenna, the spectrometer being configured to detect the strength of the magnetic field signal generated by the blockage test antenna.
In one embodiment, the blockage test system further comprises a current probe, one end of the current probe is connected with the frequency spectrograph, the other end of the current probe is connected with the blockage test antenna, and the frequency spectrograph is used for detecting the strength of the magnetic field signal generated by the blockage test antenna through the current probe.
In one embodiment, the jam test antenna is a loop antenna.
In one embodiment, the jamming test antenna is circular in shape.
In one embodiment, the radius of the blocking test antenna is 1 m.
In one embodiment, the object to be tested is placed in the center of the blocking test antenna.
The application provides a blockage test system, which comprises a signal generator, an attenuator, an amplifier and a blockage test antenna which are sequentially connected, wherein the signal generator is used for sending out radio frequency signals, and the attenuator is used for reducing the radio frequency signals sent out by the signal generator; the amplifier is used for amplifying the radio frequency signal sent by the attenuator; the blockage test antenna is used for converting the radio-frequency signal sent by the amplifier into a magnetic field signal to be provided for an object to be tested which is placed near the blockage test antenna to carry out blockage test. According to the blocking test system, the attenuator and the amplifier are additionally arranged between the signal generator and the blocking test antenna, the attenuator can reduce the radio-frequency signals sent by the signal generator, and the phenomenon of signal distortion of the radio-frequency signals sent by the signal generator in the transmission process is avoided. The amplifier is used for amplifying the radio-frequency signal sent by the attenuator, and the radio-frequency signal transmitted to the blocking test antenna is amplified through the amplifier due to the line loss of the radio-frequency signal in transmission, so that the blocking test antenna can receive and generate a required magnetic field signal by using the radio-frequency signal conveniently, therefore, the attenuator and the amplifier are matched with each other to protect the signal generator from continuously running in a high-power state, the blocking test result of an object to be tested can be more accurate, the attenuator can also provide impedance matching simultaneously, the change of impedance is relieved, the transmission power of the radio-frequency signal is improved, and the accuracy of the blocking test result of the object to be tested is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of a congestion testing system in one embodiment;
part name and sequence number in the figure: 1. a signal generator; 2. an attenuator; 3. an amplifier; 4. blocking the test antenna; 5. an object to be tested; 6. a current probe; 7. a frequency spectrograph; 8. an antenna spring.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, "and/or" in the whole text includes three schemes, taking a and/or B as an example, including a technical scheme, and a technical scheme that a and B meet simultaneously; in addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1, the present application provides a blocking test system, which includes a signal generator 1, an attenuator 2, an amplifier 3, and a blocking test antenna 4, which are connected in sequence, where the signal generator 1 is configured to emit a radio frequency signal, and the attenuator 2 is configured to reduce the radio frequency signal emitted by the signal generator 1; the amplifier 3 is used for amplifying the radio frequency signal emitted by the attenuator 2; the blockage test antenna 4 is used for converting the radio frequency signal emitted by the amplifier 3 into a magnetic field signal to be supplied to an object 5 to be tested, which is placed near the blockage test antenna 4, for blockage test.
The blocking test system of the application, through adding attenuator 2 and amplifier 3 between signal generator 1 and blocking test antenna 4, attenuator 2 can reduce the radio frequency signal that signal generator 1 sends, avoid the radio frequency signal that signal generator 1 sends appearing the phenomenon of signal distortion in the transmission process, amplifier 3 is used for amplifying the radio frequency signal that attenuator 2 sends, because there is line loss in the radio frequency signal during transmission, amplify the radio frequency signal that transmits to blocking test antenna 4 through amplifier 3, it is convenient for blocking test antenna 4 to receive and utilize the radio frequency signal that amplifier 3 sends to produce the required magnetic field signal, therefore, attenuator 2 and amplifier 3 cooperate each other can protect signal generator 1 from not lasting operation under the high power state, can also make the blocking test result of the object 5 to be tested more accurate, and attenuator 2 can also provide impedance matching at the same time, the change of impedance is relieved, the transmission power of the radio frequency signal is improved, and the accuracy of the blocking test result of the object to be tested 5 is improved.
Specifically, the blocking test antenna 4 of the present application is made of a metal material, preferably copper, because copper has a good electrical conductivity and is low in cost, and in other embodiments, the blocking test antenna 4 may be made of other metal materials, such as aluminum, iron, and the like.
In one embodiment, the blockage test system further includes an antenna spring 8, the antenna spring 8 is wound on the blockage test antenna 4, and the antenna spring 8 is used for increasing the gain of the blockage test antenna 4 and reducing the standing wave of the blockage test antenna 4, specifically, increasing the gain of the blockage test antenna 4 and reducing the standing wave of the blockage test antenna 4, so that the transmission power of the radio frequency signal can be increased, and the accuracy of the blockage test result of the object to be tested 5 can be improved.
In one embodiment, the number of the antenna springs 8 is multiple, and the multiple antenna springs 8 are arranged on the blockage test antenna 4 at intervals, specifically, the multiple antenna springs 8 have stronger gain than a single antenna spring 8, so that the standing wave of the blockage test antenna 4 can be reduced, and the blockage test result of the object to be tested 5 is more accurate.
In one embodiment, the number of turns of the coil of the antenna spring 8 is adjustable, and specifically, the number of turns of the coil of the antenna spring 8 is different for different gains of the antenna spring 8 and different for reduced standing waves of the blocking test antenna 4, so the number of turns of the coil of the antenna spring 8 can be made according to actual measurement requirements, and is not limited herein.
In one embodiment, the blockage test system further comprises a spectrometer 7, the spectrometer 7 is connected to the blockage test antenna 4, and the spectrometer 7 is configured to detect the strength of the magnetic field signal generated by the blockage test antenna 4, and specifically, the spectrometer 7 can detect the change of the strength of the magnetic field signal generated by the blockage test antenna 4 in real time.
In one embodiment, the blockage test system further comprises a current probe 6, one end of the current probe 6 is connected with a frequency spectrograph 7, the other end of the current probe 6 is connected with the blockage test antenna 4, the frequency spectrograph 7 is used for detecting the intensity of the magnetic field signal generated by the blockage test antenna 4 through the current probe 6, and particularly, the frequency spectrograph 7 is used for detecting the change of the intensity of the magnetic field signal generated by the blockage test antenna 4 in real time through the current probe 6.
In one embodiment, the jamming test antenna 4 is a loop antenna, preferably a loop horizontally polarized antenna, which generates a relatively stable magnetic field strength.
In one embodiment, the jamming test antenna 4 is circular, and particularly, in the loop antenna, the magnetic field intensity generated by the circular antenna is the most stable, which is beneficial to the accuracy of the jamming test result of the object to be tested 5.
In one embodiment, the radius of the blockage test antenna 4 is 1m, specifically, the radius of the blockage test antenna 4 is denoted as r, and the magnetic field strength of the object to be tested 5 is 82dB μ a/m according to the ETSI EN 303417 v1.1.1(2017-09) standard. If the blockage test antenna 4 is tested with a transmission intensity of 82dB muA/m, the magnetic field intensity to which the object 5 to be tested is subjected follows
When r is 0.5m, the magnetic field intensity emitted by the blocking test antenna 4 and the magnetic field intensity received by the object to be tested 5 are the same as 82dB mu A/m, and the standard requirement is met. However, in the ETSI EN 303417 v1.1.1(2017-09) standard, it is clearly indicated that the radius of the blocking test antenna 4 must be greater than the radius of the circle surrounded by the edges of the objects to be tested 5 by 0.75m, and 1m is selected as the radius of the blocking test antenna 4 by comparison, so that the requirement of the blocking test antenna 4 for the minimum radius is met, the method is suitable for most objects to be tested 5 on the market, the size of the blocking test antenna 4 is controlled, and the manufacturing cost is reduced
It is found that the strength of the magnetic field emitted by the jamming test antenna 4 is equal to about 88dB mua/m.
In one embodiment, the object 5 is placed at the center of the blockage test antenna 4, specifically, the object 5 is a wireless charging device, the object 5 is placed at the center of the blockage test antenna 4 according to the placement standard of the object 5, and the placement of the object 5 at the center of the blockage test antenna 4 is more favorable for the accuracy of the blockage test result of the object 5.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the technical solutions of the present invention, which are made by using the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A jam testing system, comprising: the device comprises a signal generator, an attenuator, an amplifier and a blockage test antenna which are sequentially connected, wherein the signal generator sends out radio frequency signals; the attenuator is used for reducing the radio frequency signal emitted by the signal generator; the amplifier is used for amplifying the radio frequency signal emitted by the attenuator; the blockage test antenna is used for converting the radio frequency signal sent by the amplifier into a magnetic field signal so as to provide the magnetic field signal for an object to be tested which is placed near the blockage test antenna to carry out blockage test.
2. The jamming test system according to claim 1, further comprising an antenna spring disposed around the jamming test antenna, the antenna spring for increasing a gain of the jamming test antenna and reducing a standing wave of the jamming test antenna.
3. The jam test system according to claim 2, characterized in that the number of the antenna springs is plural, and plural antenna springs are provided at intervals on the jam test antenna.
4. The occlusion testing system of claim 2, wherein a number of coil turns of said antenna spring is adjustable.
5. The jam test system of claim 1 further including a spectrometer connected to the jam test antenna for detecting the strength of the magnetic field signal produced by the jam test antenna.
6. The jam test system of claim 5 further including a current probe, one end of which is connected to the spectrometer and the other end of which is connected to the jam test antenna, the spectrometer being configured to detect the strength of the magnetic field signal generated by the jam test antenna via the current probe.
7. The jam test system of claim 1 wherein the jam test antenna is a loop antenna.
8. The jam test system of claim 6 wherein the jam test antenna is circular in shape.
9. The jamming test system according to claim 8, wherein the jamming test antenna has a radius of 1 m.
10. The jam test system of claim 7 wherein the test object is placed in a central location of the jam test antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122234410.0U CN215894795U (en) | 2021-09-15 | 2021-09-15 | Blockage test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122234410.0U CN215894795U (en) | 2021-09-15 | 2021-09-15 | Blockage test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215894795U true CN215894795U (en) | 2022-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122234410.0U Active CN215894795U (en) | 2021-09-15 | 2021-09-15 | Blockage test system |
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| CN (1) | CN215894795U (en) |
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2021
- 2021-09-15 CN CN202122234410.0U patent/CN215894795U/en active Active
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