Ultrahigh frequency RFID reader-writer

Abstract

The utility model provides an ultrahigh frequency RFID reader-writer, and belongs to the field of radio frequency identification equipment. The reader-writer comprises a bottom plate, an upper cover, an indicating lamp, an external interface, an antenna reflecting plate, an ultrahigh frequency RFID read-write module, a circuit board and a buzzer. The circuit board comprises a main control chip, a temperature and humidity sensor, an attitude sensor and a power management module; the bottom plate and the upper cover can be covered, and the bottom plate is made of a metal material; the ultrahigh-frequency RFID read-write module is adhered to the inner side of the bottom plate through a heat-conducting adhesive; the antenna reflecting plate is arranged between the ultrahigh frequency RFID read-write module and the circuit board; the temperature and humidity sensor, the attitude sensor and the power management module on the circuit board are simultaneously connected with the main control chip; and the indicator lamp, the external interface, the antenna reflecting plate, the ultrahigh frequency RFID read-write module and the buzzer are also connected with the main control chip. According to the utility model, the heat dissipation capability and the self-detection capability of the reader-writer are improved.

Description

Technical Field

[0001] The utility model belongs to the field of radio frequency identification devices, and particularly relates to a ultra-high frequency RFID reader / writer. Background Art

[0002] Radio Frequency Identification (RFID) is a non-contact two-way data communication via radio frequency. It reads and writes a recording medium (such as an electronic tag or a radio frequency card) by radio frequency to achieve the purpose of identifying a target and exchanging data, and is applied to fields such as animal microchips, automobile anti-theft chips, access control, parking lot control, production line automation, and material management. It has been widely used especially in modern logistics, warehousing management, asset tracking and other fields. The identification distance, data exchange speed, and anti-interference ability to the outside world of RFID technology are closely related to the frequency of the emitted electromagnetic wave. Generally speaking, the higher the frequency, the farther the identification distance, the faster the data exchange speed, the higher the forgery difficulty, the stronger the anti-interference ability to the outside world, and at the same time the device volume is more compact. Therefore, with the reduction of manufacturing costs and the further improvement of high-frequency technology, the application of ultra-high frequency RFID systems will be more extensive.

[0003] In the prior art, when ultra-high frequency RFID technology is applied to a reader / writer, the increase in frequency not only brings an improvement in automatic identification efficiency, but also causes problems such as reduced reliability and difficult heat dissipation. In addition, although the ultra-high frequency RFID reader / writer has high reading and writing efficiency, the current sensing detection usually only depends on the working state feedback of the RFID module itself, lacking comprehensive monitoring of the device working environment (such as temperature and humidity) and the device installation state (such as the tilt angle and vibration of the reader / writer). Since the installation position of the RFID reader / writer directly affects the reading and writing effect, it is difficult to timely discover and prevent potential problems such as poor RFID identification performance, or failure to identify, and device failures in a complex environment. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, the utility model aims to provide a ultra-high frequency RFID reader / writer, which improves the reader / writer in terms of heat dissipation performance, self-detection performance, and maintenance ability.

[0005] To achieve the above object, the embodiments of the utility model adopt the following technical solutions:

[0006] The embodiments of the utility model provide a ultra-high frequency RFID reader / writer, which includes: a bottom plate 1, an upper cover 2, an indicator light 3, an external interface 4, an antenna reflector 5, a ultra-high frequency RFID reading and writing module 6, a circuit board 7, and a buzzer 8; the circuit board 7 includes a main control chip 71, a temperature and humidity sensor 72, an attitude sensor 73, and a power management module 74; wherein,

[0007] The bottom plate 1 and the upper cover 2 can be covered, and the interior is a space for placing components; the bottom plate 1 is made of metal; the upper cover 2 is a concave rectangle, with an external interface hole opened on one of its sides, and an indicator light slot and a beeper hole reserved on the outer surface; the indicator light 3 is arranged at the indicator light slot reserved on the upper cover, and the number of indicator lights is set according to requirements; the buzzer 8 is arranged inside the reserved beeper hole, the external interface 4 is arranged at the external interface hole reserved on the side of the upper cover and extends outside the upper cover 2;

[0008] The ultra-high frequency RFID reading and writing module 6 is pasted on the inner side of the bottom plate 1 through a thermal conductive adhesive;

[0009] The antenna reflector 5 is arranged between the ultra-high frequency RFID reading and writing module 6 and the circuit board 7;

[0010] The temperature and humidity sensor 72, the attitude sensor 73 and the power management module 74 on the circuit board 7 are simultaneously connected to the main control chip 71, and at the same time, the indicator light 3, the external interface 4, the antenna reflector 5, the ultra-high frequency RFID reading and writing module 6 and the buzzer 8 are also connected to the main control chip 71; the attitude sensor 73 is connected to the main control chip 71 through an SPI interface; the ultra-high frequency RFID reading and writing module 6 is connected to the main control chip 71 through a serial port.

[0011] Preferably, the bottom plate 1 has fixed mounting holes for the installation and fixation of the reader.

[0012] Preferably, the bottom plate is made of aluminum alloy, magnesium alloy or magnesium-aluminum alloy.

[0013] Preferably, the thickness of the bottom plate 1 is calculated by calculating the thermal conductivity and the thermal diffusion rate.

[0014] Preferably, the external interface 4 includes a DI interface 41, a DO interface 42, and a network interface 43.

[0015] Preferably, the network interface 43 includes an RS232 interface 431 and / or an Ethernet interface 432.

[0016] Preferably, the DI interface 41 and the DO interface 42 are connected to the main control chip 71 through GPIO.

[0017] Preferably, the attitude sensor 73 is a three-axis gyroscope, a three-axis accelerometer, a three-axis electronic compass, or a six-axis gyroscope.

[0018] Preferably, the six-axis gyroscope is connected to the main control chip 71 through an SPI interface.

[0019] Preferably, the power management module 74 includes a 24V to 5V DC buck circuit and a 5V to 3.3V DC buck circuit.

[0020] The technical solution provided by the embodiment of the present utility model has the following beneficial effects:

[0021] Through integrated design, predictive maintenance function, efficient heat dissipation design, reliable status indication and feedback mechanism, flexible communication interface and linkage operation, and high reliability and stability, the present utility model realizes a high-frequency RFID reader device with comprehensive functions, high efficiency in use, convenient maintenance, and stable operation. It has been innovated and optimized in many aspects, providing users with a better use experience and a more efficient device management solution.

[0022] Of course, it is not necessary for any product or method implementing the present utility model to achieve all the above-mentioned advantages simultaneously. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 is the overall external view schematic diagram of the high-frequency RFID reader described in the embodiment of the present utility model;

[0025] Figure 2 is the exploded view of the high-frequency RFID reader described in the embodiment of the present utility model;

[0026] Figure 3 is the front view of the high-frequency RFID reader described in the embodiment of the present utility model;

[0027] Figure 4 is the left view of the high-frequency RFID reader described in the embodiment of the present utility model;

[0028] Figure 5 is the schematic diagram of the electrical connection of the circuit board of the high-frequency RFID reader described in the embodiment of the present utility model.

[0029] Description of the Reference Numerals:

[0030] 1 - bottom plate; 2 - upper cover; 21 - upper cover support plate; 3 - indicator light; 4 - external interface; 41 - DI interface; 42 - DO interface; 43 - network interface; 431 - RS232 interface; 432 - Ethernet interface; 5 - antenna reflector; 6 - high-frequency RFID reading and writing module; 7 - circuit board; 71 - main control chip; 72 - temperature and humidity sensor; 73 - attitude sensor; 74 - power management module; 8 - buzzer. Detailed implementation manners

[0031] After discovering the above problems, the utility model applicant of the present application conducted a detailed study on the existing ultra-high frequency RFID reader structure and functions. It was found that the existing ultra-high frequency RFID readers have heat dissipation problems caused by unreasonable heat dissipation designs, which are mainly reflected in two aspects: insufficient heat dissipation structure design and installation and fixation. In the first aspect, most of the existing readers are made of steel plates or plastics. When the ultra-high frequency RFID reader reads and writes cards at high frequencies, the power consumption is relatively large, resulting in a rapid increase in the device temperature. Most of the existing heat dissipation structure designs are simple natural air-cooling heat dissipation, with limited effects and unable to effectively solve the heat dissipation problems under high power conditions. The heat accumulation inside the device not only affects the performance of the RFID module but may also cause the device to be damaged due to overheating. The heat accumulation affects the device performance and lifespan and cannot meet the requirements of long-term continuous operation. In the second aspect, the heat dissipation devices of the existing RFID readers are usually fixed inside the device and cannot be flexibly combined with external devices or structures, restricting the improvement space of the heat dissipation effect.

[0032] At the same time, due to the lack of intelligent monitoring and diagnosis functions, the existing RFID readers mostly rely on regular manual maintenance and require frequent on-site inspections by workers. This not only increases the labor cost and maintenance time, but also users cannot grasp the operating conditions of the on-site devices in real time. Only when the device fails and affects the on-site operations do they know that there is a problem with the device, and then they will coordinate the maintenance personnel to eliminate the problem on-site, seriously affecting the user's work plan, reducing the usage efficiency and reliability of the device, and unable to achieve intelligent and predictive maintenance.

[0033] The existing RFID readers usually do not integrate sensors such as temperature and humidity sensors and six-axis gyroscopes, resulting in the device being unable to monitor the working environment where the device is located and its own installation state in real time, making it difficult to achieve real-time status monitoring and predictive maintenance for long-term operation, and lacking multi-faceted sensing and detection capabilities. Therefore, the above problems still exist.

[0034] It should be noted that the defects existing in the above prior art solutions are all the results obtained by the utility model applicant through practice and careful research. Therefore, the process of discovering the above problems and the solutions proposed by the embodiments of the present utility model for the above problems in the following text should all be the contributions made by the utility model applicant during the process of the present utility model.

[0035] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. The components of the embodiments of the present utility model described and illustrated in the drawings here can be arranged and designed in various different configurations. It should be noted that, without conflict, the embodiments and features in the embodiments of the present utility model can also be combined with each other.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of the present utility model, the terms "first", "second", "third", "fourth", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0037] After the above in-depth analysis, the present utility model proposes a ultra-high frequency RFID reader, which optimizes the reader structure from aspects of heat dissipation, device reliability, maintenance efficiency and sensing detection.

[0038] In terms of sensing detection and predictive maintenance, by integrating a temperature and humidity sensor and a six-axis gyroscope sensor, the working environment state and its own installation state of the device are monitored in real time, providing comprehensive sensing detection capabilities. The main control chip periodically detects the communication status of the peripheral network interface chip, the RFID ultra-high frequency reading and writing module, the temperature and humidity module, and the six-axis gyroscope module to determine whether the key modules inside the device are operating normally. At the same time, it detects whether the environmental temperature and humidity, the installation position of the device are tilted, and whether there is vibration at the installation position, etc., and notifies the user. Such a design enables users to discover potential problems in a timely manner, perform predictive maintenance, reduce the failure rate, and improve the reliability and maintenance efficiency of the device.

[0039] In terms of heat dissipation design, the temperature of the ultra-high frequency RFID reader rises rapidly during card reading. To prevent the device from being affected in performance or damaged due to overheating, the present utility model designs an efficient heat dissipation solution, directly mounting and fixing the RFID ultra-high frequency reading and writing module on the metal plate at the bottom of the device; this metal plate is made of alloy aluminum with higher thermal conductivity, and the thickness of the current metal heat dissipation plate is calculated by calculating the thermal conductivity and the thermal diffusion rate, further improving the heat dissipation performance of the alloy aluminum plate, effectively reducing the working temperature of the RFID module. At the same time, the metal plate is used as an enhanced heat dissipation structure. In the design of the metal plate, the metal plate not only serves as a radiator, but also has fixed mounting holes, which facilitate users to install the device in other places, such as on a wall or a metal frame, so that the heat is conducted out through the mounting structure, further enhancing the heat dissipation effect, not only improving the heat dissipation efficiency, but also ensuring the stability of the device in various installation environments.

[0040] SeeFigures 1 - 5 , the ultra-high frequency RFID reader provided in this embodiment includes: a bottom plate 1, an upper cover 2, an upper cover support plate 21, an indicator light 3, an external interface 4, an antenna reflector 5, an ultra-high frequency RFID reading and writing module 6, a circuit board 7, and a buzzer 8; the circuit board 7 includes a main control chip 71, a temperature and humidity sensor 72, an attitude sensor 73, and a power management module 74.

[0041] Among them, the bottom plate 1 and the upper cover 2 can be covered, and the inside is a space for placing other components. The bottom plate 1 is made of metal, and the bottom plate 1 has fixed mounting holes. Preferably, the bottom plate is aluminum alloy, magnesium alloy or magnesium-aluminum alloy; the fixed mounting holes on the bottom plate 1 are used for the installation and fixation of the reader. Users can fix the reader to other metal structures or walls through the fixed mounting holes. After fixed installation, the heat is not only dissipated through the metal backplane, but also can be further conducted out through the installation structure, enhancing the heat dissipation effect.

[0042] The upper cover 2 is a concave rectangle, and an external interface hole is opened on one of the side edges, and an indicator light slot and a buzzer sound hole are reserved on the outer side. The upper cover support plate 21 can be arranged inside the upper cover 2 to make the layout of internal components compact. The indicator light 3 is arranged at the reserved indicator light slot of the upper cover, and the number of indicator lights is set according to needs, for example, six; the buzzer 8 is arranged inside the reserved buzzer sound hole, and the external interface 4 is arranged at the external interface hole reserved on the side of the upper cover and extends outside the upper cover 2.

[0043] The external interface 4 includes a DI interface 41, a DO interface 42, and a network interface 43, where the network interface 43 includes an RS232 interface 431 and / or an Ethernet interface 432. Among them, the DI interface 41 has two channels, and the DO interface 42 has three channels.

[0044] The ultra-high frequency RFID reading and writing module 6 is pasted on the inner side of the bottom plate 1 through a heat-conducting adhesive. Through the combined heat-conducting effect of the heat-conducting adhesive, the metal bottom plate, and the fixed mounting holes, the heat generated when the ultra-high frequency RFID reading and writing module 6 works is dissipated to the external environment to keep the device running stably. And the thickness of the bottom plate 1 is calculated by calculating the thermal conductivity and the thermal diffusion rate, further improving the heat dissipation performance of the bottom plate 1, so as to have good thermal conductivity and be able to dissipate heat quickly.

[0045] The antenna reflector 5 is arranged between the ultra-high frequency RFID reading and writing module 6 and the circuit board 7.

[0046] The temperature and humidity sensor 72, attitude sensor 73, and power management module 74 on the circuit board 7 are simultaneously connected to the main control chip 71. At the same time, the indicator light 3, external interface 4, antenna reflector 5, ultra-high frequency RFID reader / writer module 6, and buzzer 8 are also connected to the main control chip 71. The temperature and humidity sensor 72 is used to regularly collect the temperature and humidity data of the working environment of the reader / writer and report it to the user through the main control chip 71, enabling the user to understand the environmental conditions around the device in real time. The attitude sensor 73 is connected to the main control chip through the SPI interface and is used to regularly collect the angle and vibration data of the installation position of the reader / writer, judge the installation state and vibration condition of the reader / writer, and report it to the user through the main control chip 71, enabling the user to understand the installation angle and vibration condition of the device in real time. The main control chip 71 regularly detects the communication status of the indicator light 3, external interface 4, ultra-high frequency RFID reader / writer module 6, temperature and humidity sensor 72, and attitude sensor 73 at a predetermined time (such as 5 minutes) to judge whether each electronic component is normal; at the same time, it is also used to report the detection results of each electronic component to the user device in the form of a heartbeat packet, enabling the user to understand the operating status of the reader / writer in real time and discover potential problems in a timely manner.

[0047] The attitude sensor 73 can adopt a three-axis gyroscope, three-axis accelerometer, three-axis electronic compass, or six-axis gyroscope, etc.

[0048] The power management module 74 includes a 24V to 5V DC step-down circuit and a 5V to 3.3V DC step-down circuit.

[0049] When the provided ultra-high frequency RFID reader / writer is in use, after the reader / writer is fixedly installed at the specified position through the fixed installation holes on the bottom plate 1, the 24V power supply is turned on, and the DC step-down circuit reduces the voltage to 5V and 3.3V to supply power to each module of the device, completing the startup of the reader / writer device. The main control chip 71 initializes each module, including the RFID ultra-high frequency reader / writer module 6, temperature and humidity sensor 72, attitude sensor 73, indicator light 3, and buzzer 8. After each module is ready, the device completes initialization and enters the normal working state.

[0050] The working states include: real-time data acquisition and status monitoring, RFID reading and writing operations, DI and DO linkage operations, and device status monitoring and heartbeat packet reporting. In the real-time data acquisition and status monitoring phase, the attitude sensor 73 periodically acquires the angle and vibration data of the device and reports them to the user device through the main control chip 71, enabling the user to understand in real time whether the installation angle of the device has changed and the vibration condition; the indicator light 3 indicates according to the working states of each interface and module, and the connection state of the Ethernet interface 432, the active state of the RS232 interface 431, and the effective input and output working states of the DI interface 41 and the DO interface 42 are displayed through different indicator lights. In the RFID reading and writing operation phase, the user sends a card reading command to the main control chip 71 through the RS232 interface 431 or the Ethernet port 432; after receiving the card reading command, the main control chip 71 controls the ultra-high frequency RFID reading and writing module 6 to perform a card reading operation; when the card reading is successful, the buzzer 8 beeps to prompt, and at the same time, the card reading result is returned to the user device through the RS232 interface 431 or the Ethernet interface 432. In the DI and DO linkage operation phase, according to the user configuration, different DI trigger signals can execute card reading operations; after receiving the trigger signal of the DI interface 41, the main control chip 71 controls the ultra-high frequency RFID reading and writing module 6 to perform card reading; after the card reading is successful or failed, corresponding switch actions configured by the user are executed through the DO interface 42, which can indicate the success or failure state of the card reading or achieve the linkage effect of on-site devices. In the device status monitoring and heartbeat packet reporting phase, the main control chip 71 periodically detects the communication states of each peripheral module, including the RFID ultra-high frequency reading and writing module 6, the temperature and humidity sensor 72, the attitude sensor 73, and each external interface 4; if an abnormal state is detected, the main control chip 71 controls the indicator light 3 to indicate the abnormal state of the device, and at the same time, the main control chip 71 incorporates the detection result into the heartbeat packet data and reports it to the user device through the Ethernet interface 432 or the RS232 interface 431 to prompt the user of the specific abnormal situation.

[0051] As can be seen from the above technical solutions, the ultra-high frequency RFID reader provided in this embodiment integrates a temperature and humidity sensor, an attitude sensor, an indicator light, a buzzer, etc., to achieve real-time data collection, status monitoring, and reading and writing operations. A stable power supply is provided through a DC buck circuit, and the main control chip controls the normal operation of each module and communicates through the RS232 interface and the Ethernet port. The working process of the device covers multiple links such as data collection, status monitoring, RFID reading and writing operations, DI and DO linkage operations, etc., providing users with a comprehensive and efficient usage experience. In this embodiment, environmental monitoring and device status detection are carried out through the temperature and humidity sensor and the attitude sensor to achieve predictive maintenance. It can collect the environmental temperature and humidity, the installation angle and vibration of the device in real time, provide real-time monitoring data to the user, and at the same time provide preventive maintenance. By regularly detecting the communication status of the peripheral modules, potential problems can be discovered in advance, the incidence of device failures can be reduced, and the reliability of the device can be improved. The RFID reading and writing module is tightly connected to the metal backplane with thermal grease, and efficient heat dissipation is carried out through the metal backplane. The metal backplane has good heat conduction performance and can quickly dissipate the heat of the RFID reading and writing module to the external environment. The high heat dissipation efficiency keeps the device running stably. The device is fixed to other metal structures or walls through the mounting holes to further enhance the heat dissipation effect and extend the service life of the device; by regularly detecting the communication status of the peripheral modules, heartbeat packet data is generated and reported to the user device to ensure the high reliability and stability of the device. Regularly detect the communication status of the peripheral modules. If an abnormality is detected, the indicator light prompts the user, and at the same time, heartbeat packet data is generated and reported. The user can discover and handle the problem in time; through real-time monitoring and regular detection, the normal operation of each module of the device is ensured, and the stability and reliability of the device are improved.

[0052] The above description is only a preferred embodiment of the present invention and an explanation of the applied technical principles, and is not intended to limit the scope of the present invention claimed. Instead, it merely represents a preferred embodiment of the present invention. Those skilled in the art should understand that the scope of the invention involved in the present invention is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

Claims

1. An ultra-high frequency RFID reader, characterized in that: The reader / writer comprises: a bottom plate (1), an upper cover (2), an indicator light (3), an external interface (4), an antenna reflector (5), an ultra-high frequency RFID reading / writing module (6), a circuit board (7) and a buzzer (8); the circuit board (7) comprises a main control chip (71), a temperature and humidity sensor (72), a posture sensor (73) and a power management module (74); wherein, The bottom plate (1) and the upper cover (2) can be covered, and the interior is a space for placing components; the bottom plate (1) is made of metal; the upper cover (2) is an inwardly concave rectangle, one of the sides of which is provided with an external interface hole, and an indicator light slot and a buzzer hole are reserved on the outer side; the indicator light (3) is arranged at the indicator light slot reserved in the upper cover, and the indicator light is set in number according to needs; the buzzer (8) is arranged on the inner side of the reserved buzzer hole, and the external interface (4) is arranged at the external interface hole reserved on the side of the upper cover and extends out of the upper cover (2); The ultra-high frequency RFID reading and writing module (6) is adhered to the inner side of the bottom plate (1) by means of a thermally conductive adhesive; The antenna reflector (5) is arranged between the ultra-high frequency RFID reading and writing module (6) and the circuit board (7); The temperature and humidity sensor (72), the attitude sensor (73) and the power management module (74) on the circuit board (7) are simultaneously connected to the main control chip (71), and the indicator light (3), the external interface (4), the antenna reflection plate (5), the ultra-high frequency RFID reading and writing module (6) and the buzzer (8) are also connected to the main control chip (71); the attitude sensor (73) is connected to the main control chip (71) via an SPI interface; and the ultra-high frequency RFID reading and writing module (6) is connected to the main control chip (71) via a serial port.

2. The UHF RFID reader / writer according to claim 1, characterized in that: The bottom plate (1) is provided with a fixing hole for fixing the reader / writer.

3. The UHF RFID reader / writer according to claim 1, characterized in that: The bottom plate (1) is made of aluminum alloy, magnesium alloy or magnesium-aluminum alloy.

4. The UHF RFID reader / writer according to claim 1, characterized in that: The thickness of the bottom plate (1) is calculated by calculating the thermal conductivity and the thermal diffusion rate.

5. The UHF RFID reader / writer according to claim 1, characterized in that: The external interface (4) comprises a DI interface (41), a DO interface (42), and a network interface (43).

6. The UHF RFID reader / writer according to claim 5, characterized in that: The network interface (43) includes an RS232 interface (431) and / or an Ethernet interface (432).

7. The UHF RFID reader / writer according to claim 5, characterized in that: The DI interface (41) and the DO interface (42) are connected to the main control chip (71) via GPIO.

8. The UHF RFID reader / writer according to claim 1, characterized in that: The attitude sensor (73) is a three-axis gyroscope, a three-axis accelerometer, a three-axis electronic compass, or a six-axis gyroscope.

9. The UHF RFID reader / writer according to claim 7, characterized in that: The six-axis gyroscope is connected to the main control chip (71) via the SPI interface.

10. The UHF RFID reader / writer according to claim 1, characterized in that: The power management module (74) comprises a 24V to 5V DC step-down circuit and a 5V to 3.3V DC step-down circuit.

Images