CN219105041U - Device for testing position and signal strength of NFC antenna - Google Patents
Device for testing position and signal strength of NFC antenna Download PDFInfo
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- CN219105041U CN219105041U CN202223174916.8U CN202223174916U CN219105041U CN 219105041 U CN219105041 U CN 219105041U CN 202223174916 U CN202223174916 U CN 202223174916U CN 219105041 U CN219105041 U CN 219105041U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The utility model relates to a device for testing the position and the signal intensity of an NFC antenna, belongs to the technical field of NFC testing, and solves the problems of complex structure, low efficiency and inaccurate testing result of the conventional NFC antenna position and signal intensity testing device in the prior art. The device comprises: the electronic tag chip is used for activating the NFC equipment to be tested to continuously send out electromagnetic field signals; the test coil is electrically connected with the electronic tag chip and is used for sensing electromagnetic field signals sent by NFC equipment to be tested; the first detection circuit is electrically connected with the test coil through a first switch; and a plurality of second detection circuits, wherein each second detection circuit is electrically connected with the test coil through a second switch. The NFC antenna position and the signal intensity are simply, conveniently and accurately measured.
Description
Technical Field
The present utility model relates to the field of NFC testing technologies, and in particular, to a device for testing the position and signal strength of an NFC antenna.
Background
In recent years, with the continuous popularization and use of an NFC system, the types of handheld mobile NFC card reading equipment and the types of NFC mobile phones are more and more supported; however, the NFC card reading performance of some devices is uneven, and the position identification of the NFC card reading antenna is unclear, so that the actual use effect of users is very affected.
The existing NFC antenna position and signal strength testing device is complex in structure, low in efficiency and inaccurate in testing result.
Disclosure of Invention
In view of the above analysis, the present utility model aims to provide a device for testing the position and signal strength of an NFC antenna, which is used for solving the problems of complex structure, low efficiency and inaccurate test result of the existing device for testing the position and signal strength of the NFC antenna.
The aim of the utility model is mainly realized by the following technical scheme:
an apparatus for testing NFC antenna position and signal strength, comprising:
the electronic tag chip is used for activating the NFC equipment to be tested to continuously send out electromagnetic field signals;
the test coil is electrically connected with the low-power consumption electronic tag chip and is used for sensing electromagnetic field signals sent by NFC equipment to be tested;
the first detection circuit is electrically connected with the test coil through a first switch;
and a plurality of second detection circuits, wherein each second detection circuit is electrically connected with the test coil through a second switch.
Based on a further improvement of the above scheme, the test coil is a circular coil.
Based on a further improvement of the scheme, the outer diameter of the test coil is less than or equal to 25mm.
Based on a further improvement of the above scheme, the first detection circuit comprises a plurality of detection branches connected in parallel.
Based on a further improvement of the above scheme, the number of parallel branches of the first detection circuit is the same as the number of parallel branches of the second detection circuit.
Based on a further improvement of the above solution, each of the second detection circuits comprises a plurality of detection branches connected in parallel.
According to the scheme, each branch circuit comprises an adjusting resistor, a constant current diode and an LED indicator lamp which are sequentially connected.
Based on the further improvement of the scheme, the cathode of the constant current diode is connected with the anode of the LED indicator lamp.
Based on the further improvement of the scheme, the electronic tag chip is a low-power-consumption electronic tag chip.
Based on the further improvement of the scheme, the low-power-consumption electronic tag chip adopts NTAG21x series.
Compared with the prior art, the NFC device to be detected is activated through the electronic tag chip, so that the NFC device to be detected continuously emits electromagnetic waves, the detection device can continuously detect, the detection time is saved, and the detection efficiency is improved. The detection circuit only comprises the resistor, the constant current diode and the LED lamp, a bridge circuit is not needed, the device structure is simple, and the cost is reduced.
In the utility model, the technical schemes can be mutually combined to realize more preferable combination schemes. Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the utility model, like reference numerals being used to refer to like parts throughout the several views.
Fig. 1 is a block diagram of an apparatus for testing NFC antenna position and signal strength according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of an apparatus for testing NFC antenna position and signal strength according to an embodiment of the present utility model.
Reference numerals:
1-a test coil; 2-an electronic tag chip; 3-a first detection circuit; 4-a second detection circuit; 5-adjusting the resistance; 6-a constant current diode; 7-LED pilot lamp.
Detailed Description
Preferred embodiments of the present utility model will now be described in detail with reference to the accompanying drawings, which form a part hereof, and together with the description serve to explain the principles of the utility model, and are not intended to limit the scope of the utility model.
In recent years, with the continuous popularization and use of an NFC system, the types of handheld mobile NFC card reading equipment and the types of NFC mobile phones are more and more supported; however, the NFC card reading performance of some devices is uneven, and the position identification of the NFC card reading antenna is unclear, so that the actual use effect of users is very affected.
The existing NFC antenna position and signal strength testing device is complex in structure, low in efficiency and inaccurate in testing result.
In one embodiment of the present utility model, an apparatus for testing the position and signal strength of an NFC antenna is disclosed, as shown in fig. 1, including:
the electronic tag chip is used for activating the NFC equipment to be tested to continuously send out electromagnetic field signals;
the test coil is electrically connected with the electronic tag chip and is used for sensing electromagnetic field signals sent by NFC equipment to be tested;
the first detection circuit is electrically connected with the test coil through a first switch;
and a plurality of second detection circuits, wherein each second detection circuit is electrically connected with the test coil through a second switch.
The mobile NFC device generally adopts a periodic field communication manner to save power, which results in that the signal of the NFC device to be tested cannot be continuously received during the test, and the quick test of the NFC antenna position and the signal strength is inconvenient. In order to save test time and improve test efficiency, the test device comprises an electronic tag chip, wherein the electronic tag chip is used for sending an ATQA sending signal to the NFC equipment to be tested when the test coil enters the electromagnetic field range of the NFC equipment to be tested, so that the NFC equipment to be tested is activated to continuously radiate an electromagnetic field outwards, and the test device can quickly and accurately test the antenna position and the signal strength of the NFC equipment to be tested.
The program/software related to the electronic tag chip for sending the ATQA response signal is a common method in the prior art, for example, the existing method for sending the ATQA response signal is only needed to run in the electronic tag chip, and the utility model does not relate to any improvement in software.
After the NFC equipment to be tested radiates an electromagnetic field, the test coil receives an electromagnetic field signal radiated by the NFC reading head at the end of the mobile equipment to be tested, an induction current is generated, and the intensity of the magnetic field can be detected through a detection circuit connected with the test coil.
In the implementation process, in order to accurately detect signals, the resonant frequency and the Q value of the test coil should meet the requirements of the electronic tag chip.
In practice, the test coil is of circular design. In order to conveniently determine the center point and more accurately detect the signal intensity, the diameter of the outer circle of the test coil is smaller than or equal to 25mm.
In practice, the number of test coils should be above 5 turns.
When the electronic tag is implemented, the electronic tag chip is electrically connected with the induction coil, and power is supplied to the electronic tag chip through the induction coil.
In the implementation, in order to reduce the power consumption of the device, the electronic tag chip adopts a low-power-consumption electronic tag chip, so that the electromagnetic field of the NFC equipment to be tested is started with extremely low power consumption.
In implementation, the low-power electronic tag chip can adopt NTAG21x series.
Specifically, the detection circuit of this embodiment includes first detection circuitry and a plurality of second detection circuitry, and first detection circuitry is used for carrying out rough detection to signal strength, and every second detection circuitry is used for carrying out fine detection to signal strength.
In implementation, the first detection circuit includes a plurality of detection branches connected in parallel.
The number of the parallel branches of the first detection circuit is the same as the number of the second detection circuits.
For example, as shown in fig. 2, the number of parallel detection branches in the first detection circuit is 4, and the number of second detection circuits is 4.
Specifically, each second detection circuit comprises a plurality of detection branches connected in parallel. The number of branches of the second detection circuit can be set according to the detection precision requirement, and the detection precision is higher as the number of branches is larger.
Specifically, each branch of the first detection circuit and the second detection circuit comprises an adjusting resistor, a constant current diode and an LED indicator lamp which are sequentially connected.
And the cathode of the constant current diode is connected with the anode of the LED indicator lamp.
In order to avoid burning out of the LED lamps due to overlarge current, a constant current diode is connected in series to each LED lamp, so that the maximum current of the LED lamps is limited.
Before the NFC antenna position and signal intensity are detected by adopting the device, the adjusting resistor in the device is required to be calibrated.
Illustratively, the first detection circuit of the test device includes 4 detection branches, and the test device includes 4 second detection circuits, each of which includes 10 detection branches.
The calibration process is as follows: the testing coil of the testing device is placed in an NFC electromagnetic field environment with the field intensity of 1A/m, a first detection circuit is connected with the testing coil through a first switch, the resistance of a first branch of the first detection circuit is adjusted from large to small, an LED lamp on the branch can be just lightened, and the resistance value of an adjusting resistance of the branch is kept unchanged; then the field intensity of the electromagnetic field environment is adjusted to be 2A/m, and the resistance of the second branch of the first detection circuit is adjusted from large to small, so that the LED lamp on the branch can be just lightened, and the resistance value of the adjusting resistance of the branch is kept unchanged; then the field intensity of the electromagnetic field environment is adjusted to be 3A/m, and the resistance of the third branch of the first detection circuit is adjusted from large to small, so that the LED lamp on the branch can be just lightened, and the resistance value of the adjusting resistance of the branch is kept unchanged; and then the field intensity of the electromagnetic field environment is adjusted to be 4A/m, and the resistance of the fourth branch of the first detection circuit is adjusted from large to small, so that the LED lamp on the branch can be just lightened, and the resistance value of the adjusting resistance of the branch is kept unchanged.
The first detection circuit is disconnected from the test coil by a first switch.
The first and second detection circuits are connected to the test coil through first and second switches. The field intensity of the electromagnetic field environment is adjusted to be 1.1A/m, and the resistance of a first branch of the second detection circuit is adjusted from large to small, so that an LED lamp on the branch can be just lightened, and the resistance value of the adjusting resistance of the branch is kept unchanged; the field intensity of the electromagnetic field environment is adjusted to be 1.2A/m, and the resistance of a second branch of the second detection circuit is adjusted from large to small, so that an LED lamp on the branch can be just lightened, and the resistance value of the adjusting resistance of the branch is kept unchanged; similarly, the resistance of each branch of the second detection circuit is adjusted, so that the LED lamp on the branch can be just lighted.
The same method is adopted to sequentially adjust the second to fourth second detection circuits.
When the testing device is used for testing, the first detection circuit is connected with the testing coil through the first switch for rough detection.
When the rough detection is performed, all the LED lamps of the first detection circuit are not lightened to indicate that the electromagnetic signal is smaller than 1A/m; if only the LED lamp on the first branch is on, the electromagnetic signal is within the range of 1A/m-2A/m; if the LED lamps on the first branch and the second branch are on, the electromagnetic signals are in the range of 2A/m-3A/m; if the LED lamps on the first branch, the second branch and the third branch are on, the electromagnetic signals are in the range of 3A/m-4A/m, and if the LED lamps on the four branches are on, the electromagnetic signals are above 4A/m.
If only the LED lamp on the first branch is on, the electromagnetic signal is in the range of 1A/m-2A/m, at the moment, the connection between the first detection circuit and the test coil is disconnected, and the first detection circuit and the second detection circuit are connected with the test coil through the second switch to carry out fine detection.
If all the LED lamps of the second detection circuit are not lightened, the electromagnetic signal is within the range of 1A/m-1.1A/m; if only the LED lamp on the first branch is on, the electromagnetic signal is within the range of 1.1A/m-1.2A/m; if the LED lamps on the first branch and the second branch are on, the electromagnetic signals are in the range of 1.2A/m-1.3A/m, and so on.
In practice, signal field strengths at different locations of the NFC device are detected by placing test coils at the different locations of the NFC device. When the testing device detects the strongest signal, the central position of the testing coil is the central position of the NFC antenna to be tested.
It will be appreciated by those skilled in the art that the program/software for transmitting the ATQA response signal related to the electronic tag chip in the above embodiment is a method common in the prior art, for example, the existing method for transmitting the ATQA response signal may be executed in the electronic tag chip, and the present utility model does not relate to any improvement in software. The utility model only needs to connect the devices with corresponding functions through the connection relation provided by the embodiment of the utility model, and the utility model does not relate to any improvement of program software. The connection between the hardware devices with the respective functions is realized by those skilled in the art using the prior art, and will not be described in detail herein.
The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model.
Claims (10)
1. An apparatus for testing the position and signal strength of an NFC antenna, comprising:
the electronic tag chip is used for activating the NFC equipment to be tested to continuously send out electromagnetic field signals;
the test coil is electrically connected with the electronic tag chip and is used for sensing electromagnetic field signals sent by NFC equipment to be tested;
the first detection circuit is electrically connected with the test coil through a first switch;
and a plurality of second detection circuits, wherein each second detection circuit is electrically connected with the test coil through a second switch.
2. The apparatus for testing NFC antenna position and signal strength according to claim 1, wherein the test coil is a circular coil.
3. The apparatus for testing the position and signal strength of an NFC antenna according to claim 2, wherein the outer diameter of the coil of the test coil is equal to 25mm or less.
4. The apparatus for testing the position and signal strength of an NFC antenna according to claim 1, wherein the first detection circuit includes a plurality of detection branches connected in parallel.
5. The apparatus of claim 4, wherein the number of parallel branches of the first detection circuit is the same as the number of parallel branches of the second detection circuit.
6. The apparatus for testing the position and signal strength of an NFC antenna according to claim 1, wherein each of the second detecting circuits includes a plurality of detecting branches connected in parallel.
7. The apparatus according to claim 4 or claim 6, wherein each branch comprises a regulating resistor, a constant current diode and an LED indicator lamp connected in sequence.
8. The device for testing the position and the signal strength of the NFC antenna according to claim 7, wherein a cathode of the constant current diode is connected with an anode of the LED indicator light.
9. The apparatus for testing the position and signal strength of an NFC antenna according to claim 1, wherein the electronic tag chip is a low power electronic tag chip.
10. The apparatus for testing the position and signal strength of an NFC antenna according to claim 9, wherein the low power electronic tag chip uses NTAG21x series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223174916.8U CN219105041U (en) | 2022-11-29 | 2022-11-29 | Device for testing position and signal strength of NFC antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223174916.8U CN219105041U (en) | 2022-11-29 | 2022-11-29 | Device for testing position and signal strength of NFC antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219105041U true CN219105041U (en) | 2023-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223174916.8U Active CN219105041U (en) | 2022-11-29 | 2022-11-29 | Device for testing position and signal strength of NFC antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219105041U (en) |
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- 2022-11-29 CN CN202223174916.8U patent/CN219105041U/en active Active
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