CN113009241B - Detection device and detection method for flexible radio frequency antenna - Google Patents
Detection device and detection method for flexible radio frequency antenna Download PDFInfo
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- CN113009241B CN113009241B CN202110228994.2A CN202110228994A CN113009241B CN 113009241 B CN113009241 B CN 113009241B CN 202110228994 A CN202110228994 A CN 202110228994A CN 113009241 B CN113009241 B CN 113009241B
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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
- G01R29/10—Radiation diagrams of antennas
Abstract
The invention provides a detection device of a flexible radio frequency antenna, which comprises: the transmission unit is used for transmitting a continuous flexible radio-frequency antenna, and the flexible radio-frequency antenna comprises a flexible base material, a conductive network printed on the flexible base material and chip binding points arranged on the conductive network; the detection unit comprises an excitation circuit arranged at the bottom of the flexible radio frequency antenna; the chip is arranged on the upper part of the flexible radio frequency antenna in an opposite mode and is arranged opposite to the excitation circuit; and a signal detection circuit connected to the chip; the signal detection circuit is used for acquiring a coupling signal generated by the excitation circuit to the flexible radio-frequency antenna when the chip is just opposite to the chip binding point; and the control unit is used for judging whether the flexible radio frequency antenna is qualified or not according to the coupling signal. The invention further provides a detection method of the detection device.
Description
Technical Field
The invention relates to a detection device and a detection method of a flexible radio frequency antenna.
Background
The RFID antenna manufacturing technology mainly comprises an etching method, a coil winding method and a printed antenna. Among them, RFID conductive ink printed antenna is a new technology developed, which forms a single RFID radio frequency antenna by printing conductive silver paste on a continuous substrate, then curing the silver paste, and finally cutting the antenna cured on the substrate. At present, the electrical performance of each RFID radio frequency antenna cannot be detected in a continuous production process, and the electrical performance test needs to be carried out after the cut RFID radio frequency antenna is bound with a chip, so that time and labor are wasted.
Disclosure of Invention
The invention provides a detection device and a detection method of a flexible radio frequency antenna, which can effectively solve the problems.
The invention is realized by the following steps:
the invention provides a detection device of a flexible radio frequency antenna, which comprises:
the transmission unit is used for transmitting a continuous flexible radio-frequency antenna, and the flexible radio-frequency antenna comprises a flexible base material, a conductive network printed on the flexible base material and chip binding points arranged on the conductive network;
the detection unit comprises an excitation circuit arranged at the bottom of the flexible radio frequency antenna; the chip is arranged on the upper part of the flexible radio frequency antenna in an opposite mode and is arranged opposite to the excitation circuit; and a signal detection circuit connected to the chip; the signal detection circuit is used for acquiring a coupling signal generated by the excitation circuit to the flexible radio-frequency antenna when the chip is just opposite to the chip binding point;
and the control unit is used for judging whether the flexible radio frequency antenna is qualified or not according to the coupling signal.
As a further improvement, the detection unit further includes:
and the marking unit is used for marking unqualified products according to the signal of the control unit.
As a further improvement, the detection unit further includes:
and the visual detection unit is used for carrying out secondary visual detection on unqualified products according to the signal of the control unit.
As a further refinement, the vertical distance of the chip from the chip-binding point is selected as a function of the power of the excitation circuit.
As a further improvement, the power of the excitation circuit is 10-50 mW, and the vertical distance between the chip and the chip binding point is 1-5 mm
As a further improvement, the vertical distance between the chip and the chip binding point is 2-3 mm.
As a further improvement, the vertical distance from the excitation circuit to the bottom of the flexible radio frequency antenna is 1-10 mm.
The invention further provides a detection method of the detection device of the flexible radio frequency antenna, which comprises the following steps:
s1, controlling the transmission unit to transmit the flexible radio frequency antenna at a constant speed;
s2, controlling the excitation circuit to send out radio frequency signals;
s3, the signal detection circuit acquires a coupling signal generated by the excitation circuit to the flexible radio frequency antenna when the chip is just opposite to the chip binding point;
and S4, the control unit judges whether the flexible radio frequency antenna is qualified or not according to the coupling signal.
As a further improvement, in step S4, the step of determining, by the control unit, whether the flexible rf antenna is qualified according to the coupling signal includes:
s41, when the power W emitted by the excitation circuit1With the power W received by the flexible RF antenna2And when coupling is generated, judging that the flexible radio frequency antenna is qualified, otherwise, judging that the flexible radio frequency antenna is unqualified.
The invention has the beneficial effects that: the detection device and the detection method of the flexible radio-frequency antenna can quickly detect the electrical property of the flexible radio-frequency antenna in the continuous production process, improve the production efficiency and reduce the production cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a detection apparatus for a flexible rf antenna according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a chip in the detection apparatus for a flexible rf antenna according to the embodiment of the present invention.
Fig. 3 is a flowchart of a detection method of the detection apparatus for a flexible rf antenna according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1-2, an embodiment of the present invention provides a detection apparatus for a flexible rf antenna, including:
the transmission unit 10 is used for transmitting a continuous flexible radio frequency antenna 11, wherein the flexible radio frequency antenna 11 comprises a flexible base material 110, a conductive network 112 printed on the flexible base material 110 and a chip binding point 114 arranged on the conductive network 112;
the detection unit 13 comprises an excitation circuit 134 arranged at the bottom of the flexible radio-frequency antenna 11; the chip 132 is arranged on the upper part of the flexible radio frequency antenna 11 in an opposite mode and is arranged opposite to the excitation circuit 134; and a signal detection circuit 130 connected to the chip 132; wherein the signal detection circuit 130 is used for acquiring a coupling signal generated by the excitation circuit 134 to the flexible radio frequency antenna 11 when the chip 132 is opposite to the chip bonding point 114;
and the control unit 12 is configured to determine whether the flexible radio frequency antenna 11 is qualified according to the coupling signal.
The structure of the transmission unit 10 is not limited, and may be a roller, a conveyor belt or other transmission mechanism. In this embodiment, the transmission unit 10 is a roller. The conductive network 112 in the flexible rf antenna 11 can be formed on the surface of the flexible substrate 110 by printing conductive ink and then curing the ink. The location of the chip attachment point 114 is not limited and may be designed according to different products.
The excitation circuit 134 is used for transmitting radio frequency signals to the flexible radio frequency antenna 11. The power of the radio frequency signal is positively correlated to the vertical distance of the chip 132 from the chip attach point 114. Specifically, the power of the excitation circuit 134 is defined as Q milliwatts, and the vertical distance between the chip 132 and the chip bonding point 114 is H millimeters, where Q and H substantially satisfy, and Q is k × H, where k is a constant and ranges from 10 to 12. As the vertical distance H increases, the coupling performance decreases, and therefore, preferably, the power of the excitation circuit 134 is 10mW to 50mW, and the vertical distance between the chip 132 and the chip bonding point 114 is 1 mm to 5 mm. In one embodiment, the power of the excitation circuit 134 is 20mW, and the vertical distance between the chip 132 and the chip bonding point 114 is 2-3 mm.
As a further improvement, the vertical distance from the excitation circuit 134 to the bottom of the flexible radio frequency antenna 11 is 1-10 mm.
As a further improvement, the detection unit further includes:
and the visual detection unit 14 is used for carrying out secondary visual detection on the unqualified product according to the signal of the control unit 12. The visual detection unit 14 is disposed at the downstream of the signal detection circuit 130, and when the control unit 12 determines that the flexible rf antenna 11 is not qualified according to the coupling signal, the control unit 12 further controls the visual detection unit 14 to perform image recognition on the unqualified product. Specifically, the visual inspection unit 14 performs image recognition on the flexible radio frequency antenna 11, and determines whether the flexible radio frequency antenna 11 has defects such as a breakpoint, so as to submit the accuracy of the inspection. This is because the first detection requires more precision in controlling the alignment of the chip attachment point 114 and the chip 132, and if the alignment is not accurate, a large error is generated, resulting in false detection.
As a further improvement, the detection unit further includes:
and the marking unit 15 is used for marking unqualified products according to the signal of the control unit 12.
Referring to fig. 3, the present invention provides a detection method of the detection apparatus for a flexible rf antenna, including the following steps:
s1, controlling the transmission unit 10 to transmit the flexible radio frequency antenna 11 at a constant speed;
s2, controlling the excitation circuit 134 to emit a radio frequency signal;
s3, the signal detection circuit 130 obtains the coupling signal generated by the excitation circuit 134 to the flexible rf antenna 11 when the chip 132 is facing the chip bonding point 114;
s4, the control unit 12 determines whether the flexible rf antenna 11 is qualified according to the coupling signal.
As a further improvement, in step S4, the step of the control unit 12 determining whether the flexible rf antenna 11 is qualified according to the coupling signal includes:
s41, when the power W emitted by the excitation circuit 1341With the power W received by the flexible RF antenna 112And when coupling is generated, judging that the flexible radio frequency antenna 11 is qualified, otherwise, judging that the flexible radio frequency antenna 11 is unqualified.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A device for detecting a flexible rf antenna, comprising:
a transmission unit (10) for transmitting a continuous flexible radio-frequency antenna (11), the flexible radio-frequency antenna (11) comprising a flexible substrate (110), a conductive network (112) printed on the flexible substrate (110), and chip bonding points (114) arranged on the conductive network (112);
a detection unit (13) comprising an excitation circuit (134) arranged at the bottom of the flexible radio-frequency antenna (11); the chip (132) is arranged on the upper part of the flexible radio frequency antenna (11) in an opposite mode and is arranged opposite to the excitation circuit (134); and a signal detection circuit (130) connected to the chip (132); wherein the signal detection circuit (130) is used for acquiring a coupling signal generated by the excitation circuit (134) to the flexible radio frequency antenna (11) when the chip (132) is opposite to the chip binding point (114);
and the control unit (12) is used for judging whether the flexible radio frequency antenna (11) is qualified or not according to the coupling signal.
2. The apparatus for testing a flexible rf antenna of claim 1, wherein the test unit further comprises:
and the marking unit (15) is used for marking unqualified products according to the signal of the control unit (12).
3. The apparatus for testing a flexible rf antenna of claim 1, wherein the test unit further comprises:
and the visual detection unit (14) is used for carrying out secondary visual detection on the unqualified product according to the signal of the control unit (12).
4. The device for detecting a flexible radio-frequency antenna according to claim 1, characterized in that the vertical distance of the chip (132) from the chip attachment point (114) is selected according to the power of the excitation circuit (134).
5. The device for detecting a flexible radio-frequency antenna according to claim 4, wherein the power of the excitation circuit (134) is 10mW to 50mW, and the vertical distance of the chip (132) from the chip binding point (114) is 1 mm to 5 mm.
6. The device for detecting a flexible radio-frequency antenna according to claim 4, wherein the chip (132) is located at a vertical distance of 2-3 mm from the chip attachment point (114).
7. The flexible RF antenna detection apparatus according to claim 4, wherein the vertical distance from the excitation circuit (134) to the bottom of the flexible RF antenna (11) is 1-10 mm.
8. A method for testing a device for testing a flexible rf antenna according to claim 1, comprising the steps of:
s1, controlling the transmission unit (10) to transmit the flexible radio frequency antenna (11) at a constant speed;
s2, controlling the excitation circuit (134) to send out a radio frequency signal;
s3, the signal detection circuit (130) acquires a coupling signal generated by the excitation circuit (134) to the flexible radio-frequency antenna (11) when the chip (132) is opposite to the chip binding point (114);
s4, the control unit (12) judges whether the flexible radio frequency antenna (11) is qualified or not according to the coupling signal.
9. The method for inspecting a flexible rf antenna inspection device according to claim 8, wherein in step S4, the step of the control unit (12) determining whether the flexible rf antenna (11) is qualified according to the coupling signal comprises:
s41, when the power W emitted by the excitation circuit (134)1With the power W received by the flexible RF antenna (11)2And when coupling is generated, judging the flexible radio frequency antenna (11) to be qualified, otherwise, judging the flexible radio frequency antenna (11) to be unqualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110228994.2A CN113009241B (en) | 2021-03-02 | 2021-03-02 | Detection device and detection method for flexible radio frequency antenna |
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| CN202110228994.2A CN113009241B (en) | 2021-03-02 | 2021-03-02 | Detection device and detection method for flexible radio frequency antenna |
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| CN113009241A CN113009241A (en) | 2021-06-22 |
| CN113009241B true CN113009241B (en) | 2021-09-21 |
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| CN1751327A (en) * | 2003-02-13 | 2006-03-22 | 艾利丹尼森公司 | Rfid device tester and method |
| JP2007025762A (en) * | 2005-07-12 | 2007-02-01 | Matsushita Electric Ind Co Ltd | Inspection equipment for rfid tag and base sheet to be used for the same |
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| CN113009241A (en) | 2021-06-22 |
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