CN113627205A - Radio frequency card reader and radio frequency card searching method - Google Patents
Radio frequency card reader and radio frequency card searching method Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10198—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves setting parameters for the interrogator, e.g. programming parameters and operating modes
- G06K7/10207—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves setting parameters for the interrogator, e.g. programming parameters and operating modes parameter settings related to power consumption of the interrogator
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
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Abstract
The application provides a radio frequency card reader and a radio frequency card searching method. This radio frequency card reader includes: the radio frequency card reading module comprises a radio frequency antenna and is used for outputting a radio frequency signal comprising a card searching command; one or more proximity sensors for detecting whether there is an object within a preset detection range; when at least one proximity sensor detects that an object exists in the preset detection range, sending an object detection signal; and the controller is used for responding to the object detection signal and enabling the radio frequency card reading module to output the radio frequency signal. The radio frequency card reader can remarkably reduce the power consumption of radio frequency card searching and improve the card swinging sensitivity by using the proximity sensor.
Description
Technical Field
The application mainly relates to the field of radio frequency identification, in particular to a radio frequency card reader and a radio frequency card searching method.
Background
Among terminals using a Radio Frequency Identification (RFID)/Near Field Communication (NFC) card reading interface or independent radio Frequency card readers, there are many terminals that use a battery for power supply or have a requirement for power saving.
At present, before the radio frequency card operation is carried out, a terminal with a radio frequency card reading function or an independent radio frequency card reader generally needs to carry out a card searching operation, and only a card entering the range of a radio frequency electromagnetic field can be powered on and respond to a card searching command and other subsequent operations.
The radio frequency card searching process is required to be started in a long time range sometimes, and the radio frequency electromagnetic field is required to be started all the time or to be started and closed frequently. When the radio frequency is started, in order to ensure a certain card reading distance and provide stability of bidirectional data receiving and transmitting, certain radio frequency power is necessary to be maintained. The radio frequency transceiver devices such as ISO14443 TypeA, TypeB, ISO15693 and Felica generally used in the market are used as reference, and a power supply of 5V and 100-200 mA is generally required, that is, 0.5W-1W of power is normally required. Most of radio frequency card readers are loaded all the time or intermittently when a card searching command is started, and the radio frequency carrier wave is loaded all the time or the radio frequency carrier wave is loaded intermittently and completes the card searching command.
The electricity-saving scheme is usually used for reducing the power consumption and reducing the driving current, but the card reading distance can be obviously reduced and the card reading stability is influenced if the power is too small, the normal card reading distance is between 0 and 10 centimeters through the failure of the qPBOC and EMV contact certification on the field strength requirement, and the power consumption is difficult to reduce and the card reading distance is difficult to meet.
The existing energy-saving scheme can reduce the radio frequency intensity and can also reduce the energy consumption by increasing the card searching interval. However, if the card-seeking interval is more than 300 ms, the normal time required for reading and writing the card will result in the reduced sensitivity of card-waving. After the sensitivity is reduced, the user can have obvious delay and dullness when swinging the use habit of the card and increase the error rate of reading and writing the card. Therefore, the existing scheme for detecting the radio frequency card is difficult to realize the reduction of power consumption under the condition of not sacrificing sensitivity.
Therefore, how to significantly reduce the power consumption of the radio frequency card reader in the card searching stage and improve the card-swinging sensitivity is an urgent problem to be solved by those skilled in the art.
Disclosure of Invention
The technical problem to be solved by the application is to provide a radio frequency card reader and a radio frequency card searching method, which can obviously reduce the power consumption of the radio frequency card reader in the card searching stage and improve the card swinging sensitivity.
In order to solve the above technical problem, the present application provides a radio frequency card reader, including: the radio frequency card reading module comprises a radio frequency antenna and is used for outputting a radio frequency signal comprising a card searching command; one or more proximity sensors for detecting whether there is an object within a preset detection range; when at least one proximity sensor detects that an object exists in the preset detection range, sending an object detection signal; and the controller is used for responding to the object detection signal and enabling the radio frequency card reading module to output the radio frequency signal.
In an embodiment of the application, the rf card reading module does not output the rf signal when the one or more proximity sensors are detecting whether there is an object within the preset detection range.
In an embodiment of the application, when the number of the proximity sensors is one, the proximity sensors are arranged in a central area of a coverage area of the radio frequency card reading module; when the number of the proximity sensors is multiple, the proximity sensors are uniformly distributed in the coverage range of the radio frequency card reading module.
In an embodiment of the application, the preset detection range is smaller than or equal to a card reading range of the radio frequency card reader.
In an embodiment of the present application, each of the one or more proximity sensors is an infrared proximity sensor or a visible light proximity sensor.
In an embodiment of the present application, the radio frequency card reader is provided with a card searching interval; the radio frequency card reading module is further used for: and before the end of one card searching interval, outputting the radio frequency signal.
In order to solve the technical problem, the present application further provides a radio frequency card searching method, which is applied to a radio frequency card reader, where the radio frequency card reader includes a radio frequency antenna and one or more proximity sensors, and the method includes: detecting whether an object exists in a preset detection range by using the one or more proximity sensors; and when at least one proximity sensor detects that an object exists in the preset detection range, the radio frequency card reader outputs a radio frequency signal comprising a card searching command through the radio frequency antenna.
In an embodiment of the present application, the rf reader does not output the rf signal during the detection of the presence of the object within the preset detection range using the one or more proximity sensors.
In an embodiment of the present application, when the number of the proximity sensors is one, the proximity sensors are disposed in a central area of a coverage area of the rf antenna; when the number of the proximity sensors is multiple, the proximity sensors are uniformly distributed in the coverage range of the radio frequency antenna.
In an embodiment of the application, the preset detection range is smaller than or equal to a card reading range of the radio frequency card reader.
In an embodiment of the present application, each of the one or more proximity sensors is an infrared proximity sensor or a visible light proximity sensor.
In an embodiment of the present application, the radio frequency card reader is provided with a card searching interval; the method further comprises the following steps: and before the end of one card searching interval, outputting the radio frequency signal.
Compared with the prior art, the radio frequency card reader and the radio frequency card searching method have the advantages that the proximity sensor is used, the power consumption of the radio frequency card searching can be obviously reduced, and the card swinging sensitivity can be improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the principle of the application. In the drawings:
fig. 1 is an architecture diagram of a radio frequency card reader according to an embodiment of the present application.
Fig. 2 is a flowchart illustrating a radio frequency card searching method according to an embodiment of the application.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only examples or embodiments of the application, from which the application can also be applied to other similar scenarios without inventive effort for a person skilled in the art. Unless otherwise apparent from the context, or otherwise indicated, like reference numbers in the figures refer to the same structure or operation.
As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Flow charts are used herein to illustrate operations performed by systems according to embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed in the exact order in which they are performed. Rather, various steps may be processed in reverse order or simultaneously. Meanwhile, other operations are added to or removed from these processes.
The Radio Frequency (RFID) card reader in the present application may be an independent radio frequency card reader, or may be a terminal with a radio frequency card reading function, which is not limited in this application. In one example, the radio frequency reader may be a 13.56MHz RFID reader. The radio frequency card Reader is also called Reader, and is a device for reading information in a Tag (Tag) or writing information required to be stored by the Tag into the Tag. Depending on the configuration and technology used, the reader may be a read/write device, an RFID system information control and processing center. In operation of an RFID system, radio frequency energy is transmitted by a reader in an area to form an electromagnetic field, the size of the area being dependent on the transmitted power. Tags within the coverage area of the reader are triggered to transmit data stored therein or to modify data stored therein in accordance with the reader's instructions and can communicate with a computer network via an interface. In one example, the basic construction of a reader may generally include: the device comprises a receiving and transmitting antenna, a frequency generator, a phase-locked loop, a modulation circuit, a microprocessor, a memory, a demodulation circuit and an external interface.
A Proximity Sensor (also called a near-field sensing Sensor) generally comprises an emitting diode and a receiving photosensitive or infrared triode, the circuit is simple, generally only 5V and several milliamperes to ten and several milliamperes can sense objects within dozens of centimeters, and the power of the Proximity Sensor can be adjusted so that the Sensor can sense the objects within the range of several centimeters to twenty and several centimeters. The time required by the proximity sensor to detect an object once is far shorter than the time required by the RFID card reading device from the RF on to the completion of the card searching command, waiting and receiving the card searching response, so that the proximity sensor can perform quick and reliable low-power consumption detection in a proper space range.
The application provides a radio frequency card reader. Fig. 1 is an architecture diagram of a radio frequency card reader according to an embodiment of the present application. Referring to FIG. 1, the radio frequency card reader 100 includes a radio frequency card reading module 101, one or more proximity sensors 102, and a controller 103.
The rf antenna 1011 in the rf card reading module 101 is used to output rf signals including a card-seeking command. The radio frequency card reading module 101 may further include other components required for radio frequency card reading, which is not limited in this application. Typically, the radio frequency antenna of 13.56MHz is sized to be on the size of a credit card area (ISO 7816-1). When the antenna area is less than half the area of the credit card, the card reading performance is significantly reduced.
The one or more proximity sensors 102 are used to detect whether there is an object within a preset detection range. If no object is detected, object detection may continue. When the at least one proximity sensor 102 detects an object within the preset detection range, an object detection signal is sent to the controller 103. The proximity sensor 102 may be configured to perform object detection with less power than the card-seeking power of the rf card reader 100. Therefore, by arranging the proximity sensor 102 instead of the continuous card searching of the radio frequency card reader 100, the power consumption in the card searching stage can be reduced remarkably, and the card swinging sensitivity can be improved.
In an embodiment of the present application, each of the one or more proximity sensors 102 may be an infrared proximity sensor or a visible light proximity sensor. When the number of the proximity sensors 102 is plural, the infrared proximity sensor and the visible light proximity sensor may be used simultaneously.
The preset detection range of the proximity sensor 102 may be set by a user in advance according to actual needs, which is not limited in the present application. In an embodiment of the present application, the preset detection range of the proximity sensor 102 may be smaller than or equal to the reading range of the rf card reader 100. That is, the detection range of the proximity sensor 102 is greater than or equal to the reading range of the radio frequency reader 100, so as to ensure that the proximity sensor 102 can detect the RFID tag before or when the RFID tag enters the reading range of the radio frequency reader 100. The detection range of the proximity sensor 102 for the electronic tag may be adjusted by adjusting the gain and sensitivity of the proximity sensor 102. In one example, the proximity sensor 102 may detect the electronic tag in a range of 1-20 centimeters.
In an embodiment of the present application, the rf card reading module 101 may not output the rf signal when the one or more proximity sensors 102 detect whether there is an object within a preset detection range. When the proximity sensor 102 detects an object, the proximity sensor 102 can detect a card (electronic tag) approaching, and the rf reader 100 does not output an rf signal, so that the power consumption of the rf reader 100 during the card search stage can be reduced by only relying on the proximity sensor 102 for object detection.
In an embodiment of the present application, when the number of the proximity sensors 102 is one, the proximity sensors 102 may be disposed in a central area of a coverage area of the radio frequency card reading module 101. When the number of the proximity sensors 102 is plural, the proximity sensors 102 may be uniformly distributed in the coverage of the radio frequency card reading module 101. In one example, the number of proximity sensors 102 may range from 1-4.
The controller 103 is configured to cause the rf antenna 1011 of the rf card reading module 101 to output an rf signal including a card seeking command in response to the object detection signal. After receiving the rf signal from the rf reader 100, the tag returns a response signal.
In an embodiment of the present application, the rf card reader 100 may be provided with a card searching space. The card-seeking interval can reduce the power consumption of the card-seeking stage. The rf card reading module 101 may also output an rf signal to perform normal rf detection on the rf card before a card searching interval is finished. By outputting the radio frequency signal before the end of a card-seeking interval, missed card detection can be prevented. For example, a transparent card that cannot be detected by the proximity sensor can be detected at normal radio frequencies, or in the event of a proximity sensor failure, it is ensured that the entire device functions properly.
To sum up, the radio frequency card reader of this application carries out object detection through using proximity sensor, is showing the consumption that reduces the card searching stage of radio frequency card reader to can improve the sensitive degree of waving the card.
The application also provides a radio frequency card searching method. Fig. 2 is a flowchart illustrating a radio frequency card searching method according to an embodiment of the application. The radio frequency card searching method of the embodiment is applied to a radio frequency card reader, and the radio frequency card reader comprises a radio frequency antenna and one or more proximity sensors. As shown in fig. 2, the radio frequency card searching method of the present embodiment includes the following steps:
in step 201, a radio frequency card reader detects whether an object exists in a preset detection range by using one or more proximity sensors. Compared with the card searching power consumption of the radio frequency card reader, the power consumption of the proximity sensor for object detection is lower. Therefore, by arranging the proximity sensor to replace continuous card searching of the radio frequency card reader, the power consumption in the card searching stage can be obviously reduced, and the card swinging sensitivity can be improved.
The preset detection range of the proximity sensor 102 may be set by a user in advance according to actual needs, which is not limited in the present application. In an embodiment of the application, the preset detection range may be smaller than or equal to a card reading range of the radio frequency card reader. That is to say, the detection range of the proximity sensor is greater than or equal to the card reading range of the radio frequency card reader, so that the proximity sensor can detect the RFID electronic tag before or when the RFID electronic tag enters the card reading range of the radio frequency card reader. The detection range of the proximity sensor to the electronic tag can be adjusted by adjusting the gain and the sensitivity of the proximity sensor. In one example, the detection range of the electronic tag by the proximity sensor can be 1-20 centimeters.
In an embodiment of the present application, the rf reader may not output the rf signal during the detection of the presence of the object within the preset detection range using the one or more proximity sensors. When the proximity sensor detects an object, the proximity sensor can detect a card (electronic tag) approaching, the radio frequency card reader does not output a radio frequency signal in the device, and the power consumption of the radio frequency card reader in a card searching stage can be reduced only by detecting the object by the proximity sensor.
In an embodiment of the present application, when the number of the proximity sensors is one, the proximity sensors may be disposed in a central region of a coverage area of the radio frequency antenna. When the number of the proximity sensors is plural, the proximity sensors may be uniformly distributed within the coverage of the radio frequency antenna. In one example, the number of proximity sensors may range from 1-4.
In an embodiment of the present application, each of the one or more proximity sensors may be an infrared proximity sensor or a visible light proximity sensor. When the number of the proximity sensors is plural, the infrared proximity sensor and the visible light proximity sensor may be used simultaneously.
In an embodiment of the present application, the radio frequency card reader may be provided with a card searching interval. The card-seeking interval can reduce the power consumption of the card-seeking stage. The rf card-searching method may further include step 203, outputting an rf signal before a card-searching interval is over.
In summary, the radio frequency card reading method of the application performs object detection by using the proximity sensor, so that the power consumption of the card searching stage of the radio frequency card reader is remarkably reduced, and the card swinging sensitivity can be improved.
Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing disclosure is by way of example only, and is not intended to limit the present application. Various modifications, improvements and adaptations to the present application may occur to those skilled in the art, although not explicitly described herein. Such modifications, improvements and adaptations are proposed in the present application and thus fall within the spirit and scope of the exemplary embodiments of the present application.
Also, this application uses specific language to describe embodiments of the application. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the present application is included in at least one embodiment of the present application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.
Aspects of the methods of the present application may be performed entirely by hardware, entirely by software (including firmware, resident software, micro-code, etc.), or by a combination of hardware and software. The above hardware or software may be referred to as "data block," module, "" engine, "" unit, "" component, "or" system. The controller may be one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), digital signal processing devices (DAPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, or a combination thereof. Furthermore, aspects of the present application may be represented as a computer product, including computer readable program code, embodied in one or more computer readable media. For example, computer-readable media can include but are not limited to magnetic storage devices (e.g., hard disk, floppy disk, magnetic strips … …), optical disks (e.g., Compact Disk (CD), Digital Versatile Disk (DVD) … …), smart cards, and flash memory devices (e.g., card, stick, key drive … …).
Additionally, the order in which elements and sequences of the processes described herein are processed, the use of alphanumeric characters, or the use of other designations, is not intended to limit the order of the processes and methods described herein, unless explicitly claimed. While various presently contemplated embodiments of the application have been discussed in the foregoing disclosure by way of example, it should be understood that such detail is solely for that purpose and that the appended claims are not limited to the disclosed embodiments, but, on the contrary, are intended to cover all modifications and equivalent arrangements that are within the spirit and scope of the embodiments of the application. For example, although the system components described above may be implemented by hardware devices, they may also be implemented by software-only solutions, such as installing the described system on an existing server or mobile device.
Similarly, it should be noted that in the preceding description of embodiments of the application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to require more features than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.
Where numbers describing quantities of ingredients, properties, etc. are used in some embodiments, it is understood that such numbers used in the description of the embodiments are modified in some instances by the use of the modifier "about", "approximately" or "substantially". Unless otherwise indicated, "about", "approximately" or "substantially" indicates that the number allows a variation of ± 20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximations that may vary depending upon the desired properties of the individual embodiments. In some embodiments, the numerical parameter should take into account the specified significant digits and employ a general digit preserving approach. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the range are approximations, in the specific examples, such numerical values are set forth as precisely as possible within the scope of the application.
Although the present application has been described with reference to the present specific embodiments, it will be recognized by those skilled in the art that the foregoing embodiments are merely illustrative of the present application and that various changes and substitutions of equivalents may be made without departing from the spirit of the application, and therefore, it is intended that all changes and modifications to the above-described embodiments that come within the spirit of the application fall within the scope of the claims of the application.
Claims (12)
1. A radio frequency card reader comprising:
the radio frequency card reading module comprises a radio frequency antenna and is used for outputting a radio frequency signal comprising a card searching command;
one or more proximity sensors for detecting whether there is an object within a preset detection range; when at least one proximity sensor detects that an object exists in the preset detection range, sending an object detection signal; and
and the controller is used for responding to the object detection signal and enabling the radio frequency card reading module to output the radio frequency signal.
2. The radio frequency card reader of claim 1, wherein the radio frequency card reader module does not output the radio frequency signal during the one or more proximity sensors detecting the presence of an object within the preset detection range.
3. The radio frequency card reader according to claim 1, wherein when the number of the proximity sensors is one, the proximity sensors are disposed in a central area of a coverage of the radio frequency card reader module; when the number of the proximity sensors is multiple, the proximity sensors are uniformly distributed in the coverage range of the radio frequency card reading module.
4. The radio frequency card reader of claim 1, wherein the preset detection range is less than or equal to a reading range of the radio frequency card reader.
5. The radio frequency card reader of claim 1, wherein each of the one or more proximity sensors is an infrared proximity sensor or a visible light proximity sensor.
6. The radio frequency card reader of claim 1, wherein the radio frequency card reader is provided with a card-seeking space; the radio frequency card reading module is further used for:
and before the end of one card searching interval, outputting the radio frequency signal.
7. A radio frequency card searching method is applied to a radio frequency card reader, the radio frequency card reader comprises a radio frequency antenna and one or more proximity sensors, and the method comprises the following steps:
detecting whether an object exists in a preset detection range by using the one or more proximity sensors; and
when at least one proximity sensor detects that an object exists in the preset detection range, the radio frequency card reader outputs a radio frequency signal comprising a card searching command through the radio frequency antenna.
8. The method of claim 7,
the radio frequency card reader does not output radio frequency signals during the detection of the presence of the object within the preset detection range by using the one or more proximity sensors.
9. The method of claim 7, wherein when the number of the proximity sensors is one, the proximity sensors are disposed in a central region of a coverage area of the radio frequency antenna; when the number of the proximity sensors is multiple, the proximity sensors are uniformly distributed in the coverage range of the radio frequency antenna.
10. The method of claim 7, wherein the predetermined detection range is less than or equal to a reading range of the radio frequency reader.
11. The method of claim 7, wherein each of the one or more proximity sensors is an infrared proximity sensor or a visible light proximity sensor.
12. The method of claim 7, wherein the radio frequency card reader is provided with a card-seeking interval; the method further comprises the following steps:
and before the end of one card searching interval, outputting the radio frequency signal.
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| CN202110901307.9A CN113627205A (en) | 2021-08-06 | 2021-08-06 | Radio frequency card reader and radio frequency card searching method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204759691U (en) * | 2015-07-16 | 2015-11-11 | 黄胜波 | Intelligent security system based on multisensor |
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| CN207051996U (en) * | 2017-06-27 | 2018-02-27 | 天津市滨海新区军民融合创新研究院 | A kind of intelligent access control system |
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2021
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| CN204759691U (en) * | 2015-07-16 | 2015-11-11 | 黄胜波 | Intelligent security system based on multisensor |
| CN205862346U (en) * | 2016-03-29 | 2017-01-04 | 深圳市中科车港实业有限公司 | The wireless card reader of the vehicle-mounted radio-frequency card in fixation and recognition effective range |
| CN206209751U (en) * | 2016-11-08 | 2017-05-31 | 艾体威尔电子技术(北京)有限公司 | A kind of non-contact intelligent card card-reading devcie |
| CN207051996U (en) * | 2017-06-27 | 2018-02-27 | 天津市滨海新区军民融合创新研究院 | A kind of intelligent access control system |
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Application publication date: 20211109 |