An RFID tag with long-range data reading function

Abstract

The embodiment of the application provides an RFID tag with a long-distance data reading function, comprising: a shell and a cover detachably connected to the shell; a trigger mechanism connected with the active response module and the passive response module, the trigger mechanism being used for starting the active response module or the passive response module. It relates to the field of RFID tags. By setting a manual trigger mechanism to switch the active response module and the passive response module, the multi-mode working of the RFID tag is realized, and remarkable beneficial effects are brought. Firstly, the continuity of data reading is effectively ensured. When the active response module is invalid due to battery power consumption and other reasons, the passive response module can be quickly switched through the trigger mechanism, so that the tag can stably work under different working conditions, the risk of data reading interruption is avoided, and the system reliability is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of RFID tags, and particularly to an RFID tag with a long-distance data reading function. BACKGROUND

[0002] As a non-contact automatic identification technology, radio frequency identification (RFID) technology has been widely used in logistics and warehousing, intelligent transportation, industrial manufacturing and other fields due to its efficient data acquisition and transmission capability. Existing RFID tags are mainly divided into active tags and passive tags. Active tags have built-in power supply and can actively transmit strong signals to achieve long-distance data reading of more than 20-100 meters, which are commonly used in large-scale warehouse goods tracking, vehicle automatic identification and other scenarios. Passive tags rely on the electromagnetic field generated by the reader for power supply and transmit data through the backscattering principle, which has the advantages of low cost and simple structure and plays an important role in commodity retail, access control and other fields.

[0003] However, with the complexity of application scenarios, single-mode RFID tags gradually reveal limitations. On the one hand, active tags cannot work normally when the battery fails, and there is a risk of data reading interruption. On the other hand, some scenarios need to consider both long-distance fast identification and close-range accurate identification, and single tags cannot meet the needs. Although some dual-mode RFID tags try to integrate active and passive response functions, due to the lack of effective working mode switching mechanism, when the active response module and the passive response module work at the same time and the frequencies are similar, the strong signal of the active module can easily interfere with the weak signal of the passive module, causing confusion in the data received by the reader and identification errors. In addition, the simultaneous operation of the dual module also causes unnecessary power waste, shortens the service life of the tag, and limits the application of RFID technology in long-time, low-maintenance scenarios. Therefore, there is an urgent need for an RFID tag that can flexibly switch between response modes, avoid signal interference, and optimize power consumption management to improve the stability and applicability of the RFID system. SUMMARY

[0004] According to an embodiment of the present application, an RFID tag with a long-distance data reading function is provided to solve the technical problems existing in the background art.

[0005] In a first aspect of the present application, an RFID tag with a long-distance data reading function is provided.

[0006] The RFID tag with a long-distance data reading function comprises:

[0007] a shell and an end cover detachably connected to the shell;

[0008] an active response module and a passive response module arranged inside the shell;

[0009] The active response module is configured to support communication response with the reader in a long distance range;

[0010] The passive response module is configured to support communication response with the reader in a short distance range;

[0011] A trigger mechanism connected with the active response module and the passive response module, the trigger mechanism is used to start the active response module or the passive response module.

[0012] Preferably, the trigger mechanism is driven in a manual way;

[0013] When the active response module fails, the passive response module is manually switched by the trigger mechanism to trigger the short distance response function of the RFID tag.

[0014] Preferably, the passive response module comprises:

[0015] A first circuit board;

[0016] A first chip and a first antenna integrated on the first circuit board;

[0017] The first chip and the first antenna are connected through a trigger mechanism to form a switchable electrical connection.

[0018] Preferably, when the trigger mechanism is in a first position: the trigger mechanism keeps the first chip and the first antenna open circuit, at this time the first chip is in an inactive state and cannot respond to the signal of the reader;

[0019] When the trigger mechanism is in a third position: when the trigger mechanism is operated, the trigger mechanism forms a closed circuit between the first chip and the first antenna;

[0020] In the state of closed circuit, the first antenna receives the electromagnetic field generated by the reader and generates an induced current, the induced current powers the first chip and activates the data processing function of the first chip, and the first chip realizes backscatter communication by modulating the impedance of the first antenna to transmit the stored data to the reader.

[0021] Preferably, the trigger mechanism forms a closed circuit between the first chip and the first antenna by mechanical contact closure.

[0022] Preferably, the active response module comprises:

[0023] A second circuit board;

[0024] A transmitting module, a power supply unit and a trigger switch integrated on the second circuit board;

[0025] wherein the transmitting module further comprises:

[0026] a transmitter configured to generate and modulate a radio frequency carrier signal;

[0027] a second antenna configured to radiate the modulated radio frequency signal and receive an interrogation signal from a reader;

[0028] a second chip configured to:

[0029] store a tag unique identifier and sensor data;

[0030] execute data encoding and decoding algorithms;

[0031] control a power output timing of the power supply unit by triggering the switch.

[0032] Preferably, when the trigger mechanism is in the first position; the trigger switch disconnects the power supply unit from the transmitting module, the transmitting module is in a dormant state; the power supply unit only provides micro-ampere current to the second chip to maintain the clock and trigger detection functions of the second chip.

[0033] When the trigger mechanism switches to the second position, the trigger mechanism controls the power supply unit to supply power to the transmitting module and start the transmitting module by triggering the trigger switch.

[0034] Preferably, the trigger mechanism comprises a trigger piece, an insulating rod, a trigger block, a groove body and a conductive block.

[0035] The trigger piece is connected to the insulating rod, the insulating rod passes through the first circuit board and the shell, the insulating rod is connected to the trigger block, the trigger block can contact the trigger switch, the groove body is opened on the insulating rod, and the conductive block is connected in the groove body.

[0036] When the trigger piece moves away from the shell and finally reaches the third position, the conductive block is attached to the first chip and the first antenna, respectively.

[0037] When the trigger piece moves towards the shell and finally reaches the second position, the trigger block contacts the trigger switch.

[0038] Preferably, the height of the conductive block is greater than the cross-sectional height of the first chip and the first antenna.

[0039] Preferably, it further comprises a hole body, the trigger mechanism further comprises a spring and a bottom plate; the bottom plate is connected to the hole body, and the bottom plate is connected to the trigger piece through the spring.

[0040] The one or more technical solutions provided in the application have at least the following technical effects or advantages:

[0041] The RFID tag with remote data reading function provided by the application has the following advantages: first, the continuity of data reading is effectively ensured, when the active response module is disabled due to battery power consumption or other reasons, the passive response module can be quickly switched through the trigger mechanism, so that the tag can work stably under different working conditions, the risk of data reading interruption is avoided, and the system reliability is improved.

[0042] Second, the problem of signal interference is solved. Since the active response module and the passive response module cannot be started at the same time, especially under the same or similar frequency (such as UHF frequency band), the interference of strong signal of the active module to weak signal of the passive module is avoided from the root, so that the reader can accurately receive and analyze data, and the accuracy and stability of data identification are significantly improved, and the identification error rate caused by signal conflict is reduced.

[0043] It should be understood that the content described in the summary section is not intended to limit the key or important features of the embodiments of the application, nor to limit the scope of the application. Other features of the application will become apparent through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0044] The above and other features, advantages, and aspects of the embodiments of the application will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings, in which like reference numerals denote like elements, and in which:

[0045] Figure 1 A perspective connection structure schematic diagram of the RFID tag with remote data reading function according to the embodiment of the application is shown;

[0046] Figure 2 An exploded view of the RFID tag with remote data reading function according to the embodiment of the application is shown;

[0047] Figure 3 A connection structure schematic diagram of the active response module and the passive response module of the RFID tag with remote data reading function according to the embodiment of the application is shown;

[0048] Figure 4 A connection structure schematic diagram of the trigger mechanism and the passive response module of the RFID tag with remote data reading function according to the embodiment of the application is shown;

[0049] Figure 5Fig. 1 shows a schematic diagram of the connection structure of the trigger mechanism of the RFID tag with long-distance data reading function according to an embodiment of the present application;

[0050] Figure 6 Fig. 2 shows a schematic diagram of the connection structure of the active response module of the RFID tag with long-distance data reading function according to an embodiment of the present application;

[0051] Figure 7 Fig. 3 shows a partial enlarged view of the trigger mechanism of the RFID tag with long-distance data reading function according to an embodiment of the present application;

[0052] Figure 8 Fig. 4 shows a partial schematic diagram of the trigger mechanism of the RFID tag with long-distance data reading function according to an embodiment of the present application;

[0053] Figure 9 Fig. 5 shows a schematic diagram of the connection structure of the trigger, spring and bottom plate of the RFID tag with long-distance data reading function according to an embodiment of the present application;

[0054] Figure 10 Fig. 6 shows a schematic diagram of the connection structure of the first circuit board, first antenna and first chip of the RFID tag with long-distance data reading function according to an embodiment of the present application.

[0055] The reference signs are as follows:

[0056] 1, housing; 2, end cap; 3, hole body; 4, trigger mechanism; 401, trigger; 402, spring; 403, bottom plate; 404, insulating rod; 405, trigger block; 406, groove; 407, conductive block; 5, passive response module; 501, first circuit board; 502, first antenna; 503, first chip; 6, active response module; 601, second circuit board; 602, transmitting module; 603, trigger switch; 604, power supply unit. DETAILED DESCRIPTION

[0057] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0058] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0059] like Figures 1 to 10 As shown, this RFID tag with long-range data reading function includes a housing 1 and an end cap 2. The housing 1 is rectangular in shape and is injection molded from polycarbonate (PC) material, possessing good mechanical strength and weather resistance. It has an internal cavity with dimensions of 45mm (length) × 25mm (width) × 10mm (height), and includes an active response module 6 and a passive response module 5, which are sequentially fixedly installed within the cavity of the housing 1. The triggering mechanism 4 is manually operated and is mounted on the housing 1.

[0060] In practical use, the active response module 6 and the passive response module 5 can be switched via the triggering mechanism 4, thereby enabling different triggering methods for the RFID tag. This ensures both long-range reading capability and normal RFID tag operation even if the active response module 6 fails. The active response module 6 typically operates at ultra-high frequency (UHF, 860-960MHz) or 433MHz, emitting a strong signal for long-range reading (20-100 meters or more). The passive response module 5 usually operates at high frequency (HF, 13.56MHz) or UHF, relying on backscattering to transmit data. If both are activated simultaneously, especially at the same or similar frequencies (such as UHF), the strong signal of the active response module 6 may interfere with the weak signal of the passive response module 5, leading to data confusion or conflict for the reader. This approach also optimizes power management and extends the battery life of the active tag.

[0061] In the present embodiment, the passive response module 5 comprises a first circuit board 501, a first chip 503 integrated on the first circuit board 501, and a first antenna 502, wherein the first chip 503 and the first antenna 502 are connected through the trigger mechanism 4 to form a switchable electrical connection. Specifically, the first circuit board 501 serves as the basic load-bearing structure of the passive response module 5 and is made of printed circuit board (PCB) technology, which has good electrical insulation and mechanical stability and can provide a reliable mounting platform for the first chip 503 and the first antenna 502. The first chip 503 integrates key functional modules such as signal processing, data storage, and energy management, and contains rectifier circuit, modulation and demodulation circuit, memory, etc. inside, which are used to process the energy obtained by electromagnetic induction and to encode and modulate the tag data. The first antenna 502 is in the form of a common RFID antenna such as a planar spiral antenna or a dipole antenna, which is used to receive the electromagnetic field energy transmitted by the reader and reflect the modulated response signal back to the reader. The first chip 503 and the first antenna 502 are connected through the trigger mechanism 4 to form a switchable electrical connection. The trigger mechanism 4 is internally provided with movable conductive contacts or electronic switch elements (such as relays, field effect tubes, etc.). When the user drives the trigger mechanism 4 manually and needs to activate the passive response module 5, the conductive contacts or electronic switch elements in the trigger mechanism 4 act to establish an electrical connection between the first chip 503 and the first antenna 502. At this time, when the RFID tag enters the near-field range of the reader's magnetic field, the first antenna 502 receives the electromagnetic field energy from the reader, which is transmitted to the first chip 503 through the established electrical connection. The rectifier circuit in the first chip 503 converts the received alternating current into direct current to power other circuit units inside the chip; the modulation and demodulation circuit processes the data, encodes and modulates the tag data stored in the memory, and then transmits the modulated signal to the first antenna 502 through the electrical connection, and the first antenna 502 reflects the response signal back to the reader.

[0062] In actual use, when the active response module 6 is working normally, the trigger mechanism 4 is in the default state, and the electrical connection between the first chip 503 and the first antenna 502 is in the disconnected state to reduce the power consumption of the entire RFID tag. When the active response module 6 is disabled, the user manually operates the trigger mechanism 4, the trigger mechanism 4 changes the internal structure state to form an electrical connection between the first chip 503 and the first antenna 502, and the passive response module 5 is started immediately to communicate with the reader by using the principle of near-field electromagnetic induction. For example, in a warehouse management scenario, if the active response module 6 of the RFID tag on the goods is damaged accidentally, the staff can manually operate the trigger mechanism 4 to switch to the passive response module 5, and the reader on the forklift or other near-field equipment can still identify the goods tag to obtain the relevant information of the goods, thereby ensuring the normal operation of the warehouse management process.

[0063] In the embodiment, the operation mechanism of the trigger mechanism 4 plays a key role in the function implementation of the passive response module 5. The trigger mechanism 4 has a movable mechanical structure or an electronic control component, and the electrical circuit state between the first chip 503 and the first antenna 502 is changed by switching between different positions.

[0064] The trigger mechanism 4 has two key working positions, i.e., the first position and the third position. When the trigger mechanism 4 is in the first position, the internal mechanical contact is in a separated state, which makes the electrical circuit between the first chip 503 and the first antenna 502 remain open. At this time, the first chip 503 cannot work and is in an inactive state, and even if the reader emits a signal, the first chip 503 cannot respond.

[0065] When the passive response module 5 needs to be enabled, the user manually operates the trigger mechanism 4 to move it from the first position to the third position. The conductive contact is closed by the trigger mechanism 4. Finally, the trigger mechanism 4 forms a closed circuit between the first chip 503 and the first antenna 502 when it is in the third position.

[0066] In the closed circuit state, the first antenna 502 receives the electromagnetic field generated by the reader by means of the principle of electromagnetic induction. According to Faraday's law of electromagnetic induction, the change of the electromagnetic field generates an induced current in the first antenna 502. The induced current is transmitted to the first chip 503 through the closed circuit to supply power to the rectifier circuit, the modulation and demodulation circuit, the memory and other circuit units in the first chip 503, thereby activating the data processing function of the first chip 503. The activated first chip 503 encodes the tag data stored in the memory and changes the reflection characteristics of the antenna by modulating the impedance of the first antenna 502 to realize backscatter communication. The modulated signal carrying the tag data is reflected back to the reader by the first antenna 502, and the reader decodes and demodulates the reflected signal to obtain the data information stored in the RFID tag.

[0067] In actual use, taking the logistics sorting scene as an example, when the goods are in transit, the active response module 6 of the RFID tag is in a normal working state, the triggering mechanism 4 is kept in the first position, and the passive response module 5 is in a dormant state, thereby reducing the energy consumption of the tag. Once the goods arrive at the warehouse, if the active response module 6 fails due to equipment failure, signal interference, etc., the staff can manually operate the triggering mechanism 4 to switch to the third position, and the passive response module 5 is started immediately. At this time, the fixed reader or handheld reader in the warehouse is close to the goods, emits an electromagnetic field, the first antenna 502 induces an electromagnetic field to generate a current to activate the first chip 503, and the first chip 503 transmits the data such as the category, batch, storage location, etc. of the goods to the reader through backscatter communication, helping the staff to complete the warehousing registration, sorting, etc. of the goods, and ensuring the continuity of the logistics process and the accuracy of data collection.

[0068] In the present embodiment, the active response module 6 is integrated on the second circuit board 601, the second circuit board 601 is a four-layer printed circuit board made of FR-4 material, and the size is designed to be 35mm x 25mm. The circuit board isolates the power layer, ground layer and signal layer by reasonable layering, effectively reduces electromagnetic interference, and ensures stable operation of each component. The transmitting module 602, the power supply unit 604 and the trigger switch 603 are all welded on the second circuit board 601 by surface mount technology (SMT), and each component is electrically connected through microstrip lines, vias, etc. to ensure low loss and stability of signal transmission.

[0069] The transmitting module 602 includes:

[0070] Transmitter: Si4463 radio frequency chip is selected as the transmitter core. The chip supports 433MHz-915MHz frequency band, has a built-in 20dBm power amplifier, and has multiple modulation modes such as ASK, FSK, GFSK, etc. When it works, it receives the encoded data output by the second chip through the SPI interface, and modulates the 433MHz or 915MHz radio frequency carrier signal according to the communication protocol such as ISO18000-6C. For example, when sending data, the transmitter modulates the carrier with 30% modulation depth after Manchester encoding the data, generating a modulated radio frequency signal carrying tag data.

[0071] Second antenna: adopt the inverted-F type microstrip antenna structure, the base material selects Rogers RO3003 high frequency board (dielectric constant 3.0, loss tangent 0.0013). The antenna size is optimized and designed, 18mm long, 12mm wide, connected with the transmitter through 50Ω microstrip line, realizing good impedance matching (VSWR≤1.5). The antenna has strong radiation ability, the horizontal lobe width reaches 120°, the vertical lobe width is 80°, the maximum gain is 2.8dBi, and the modulated radio frequency signal generated by the transmitter can be radiated to a distance of more than 10 meters, and the inquiry signal transmitted by the reader can also be effectively received.

[0072] Second chip: STMicroelectronics STM32L071ZBT6 low-power microcontroller. It integrates 128KB Flash memory for data storage and 8KB SRAM for program running.

[0073] The specific functions are as follows:

[0074] Data storage: a special area is divided in the Flash memory to store the unique identifier of the tag (such as 96-bit EPC code) and sensor data (if the tag integrates temperature, humidity and other sensors, the corresponding monitoring data can be stored).

[0075] Data processing: built-in data encoding and decoding algorithm library can decode the received reader inquiry signal and extract the effective command; encode the tag data to be sent and perform CRC-16 and other verification algorithms to ensure data transmission accuracy.

[0076] Power control: by controlling the on-off of the trigger switch 603, the power output timing of the power supply unit 604 to the transmission module 602 is accurately adjusted. For example, when there is no communication demand, the trigger switch 603 is controlled to be off, so that the transmission module 602 enters a low-power sleep state, reducing the overall power consumption.

[0077] Power supply unit 604 includes:

[0078] Power supply selection: a button cell with a nominal voltage of 3V and a capacity of 550mAh can provide stable DC power supply for the active response module 6.

[0079] Power management: an integrated step-down converter converts the battery voltage to 3.3V to power the transmission module 602 and the second chip. At the same time, the power management chip has high power conversion efficiency (up to 95%), and supports automatic entry into light load mode, further reducing standby power consumption.

[0080] Trigger switch 603 includes:

[0081] Type and structure: Electromagnetic relay is selected as the trigger switch 603. The relay has normally open contacts, the control end is connected with the GPIO pin of the second chip, and the load end is connected with the power supply unit 604 and the power supply line of the transmitting module 602.

[0082] Working principle: When the second chip outputs a high-level signal to the control end of the trigger switch 603, the relay coil is powered on, an electromagnetic force is generated to close the normally open contact, the power of the power supply unit 604 can be transmitted to the transmitting module 602, so that it works normally; when the second chip outputs a low-level signal, the relay coil is powered off, the contact is disconnected, the transmitting module 602 stops power supply, and enters the sleep state.

[0083] In actual use, in the logistics warehouse management, when the goods are transported to the warehouse gate, the reader deployed at the gate transmits an inquiry signal at a frequency of 433 MHz and a power of 1 W. After the second antenna of the active response module 6 receives the signal, it is amplified by a low-noise amplifier (gain 15 dB) and sent to the second chip for ASK demodulation and decoding. After the second chip identifies the inquiry instruction, it reads the unique identifier of the tag and the batch data of the goods from the memory, encodes and CRC-16 checks, and then transmits the data to the transmitter through the SPI interface. The transmitter ASK modulates the 433 MHz carrier wave to generate a modulated signal, which is amplified by power and radiated back to the reader by the second antenna, realizing the rapid long-distance inventory of goods, and the whole communication process can be completed within 100 ms.

[0084] For industrial equipment inspection, the RFID tag integrates a temperature sensor (such as Maxim DS18B20). The second chip collects temperature data at a period of 1 minute and stores it in the internal memory. When the inspection personnel carry the handheld reader close to the equipment, the reader transmits an inquiry signal, and the active response module 6 is awakened. The second chip packages the temperature data and the unique identifier of the tag, encodes and processes them, and then controls the transmitter to send the data to the reader. If the temperature data exceeds the preset threshold (such as the normal working temperature range of the equipment is 0-50℃, and when the detected temperature ≥55℃), the second chip will also control the transmitter to repeatedly send alarm data at a higher power (such as 23 dBm), to ensure that the inspection personnel obtain abnormal information in time.

[0085] When the trigger mechanism 4 is in the first position, the circuit connection between the power supply unit 604 and the transmitting module 602 is cut off, and the transmitting module 602 enters a dormant state. At the same time, the power supply unit 604 supplies power to the second chip through a low-dropout linear regulator, at which time the power supply current is only microamperes (typical value ≤ 3 μA), only maintaining the timing function of the real-time clock (RTC) inside the second chip and the trigger detection function of the GPIO pin. The second chip enters a low-power sleep mode, turning off other functional modules except the PA0 pin external interrupt detection to reduce overall power consumption. When the user manually adjusts the trigger mechanism 4 to the second position, the trigger switch 603 transmits this low-level signal to the PA0 pin of the second chip. After the second chip detects the level change of the PA0 pin, it judges it as a trigger signal through the internal program, and then outputs a high-level signal from the PB1 pin. This high-level signal energizes the control coil of the relay K1, generates an electromagnetic attraction, and closes the normally open contact of the relay K1, thereby conducting the circuit between the power supply unit 604 and the transmitting module 602. The power supply unit 604 outputs a 3.3 V stable voltage to power the transmitting module 602, and at the same time the second chip sends initialization instructions to the transmitter of the transmitting module 602 through the SPI interface, configures the working frequency, modulation method and other parameters of the transmitter, completes the start of the transmitting module 602, and makes it enter a normal working state, which can communicate with the reader at a long distance.

[0086] In actual use, for the fixed assets of an enterprise (such as servers, precision instruments, etc.), in the daily idle state, the trigger mechanism 4 of the RFID tag is in the first position, and the tag is in a low-power sleep state to reduce battery consumption. When the inspection personnel carry a handheld reader (such as Zebra MC3300) to conduct asset inspection, after reaching the asset storage location, the trigger mechanism 4 is switched to the second position to start the active response module 6. The reader transmits an inquiry signal, and the transmitting module 602 of the tag sends data such as the unique identification, storage location, and use state of the asset to the reader, and the inspection personnel can quickly complete the checking and recording of asset information through the reader, improving the inspection efficiency. If the asset moves abnormally (such as unauthorized moving), the active communication between the reader and the tag set at the key passage can timely discover and warn the abnormal asset situation.

[0087] In the embodiment, the trigger mechanism 4 forms a closed circuit between the first chip 503 and the first antenna 502 by mechanical contact closure, specifically including: the trigger 401 adopts a cylindrical button design, the top has a non-slip texture, the material is polycarbonate (PC), and the surface is frosted. The insulating rod 404 is a cylindrical rod body made of nylon 66 material, the surface is smooth, and the sliding in the hole body 3 is smooth. The trigger block 405 is made of ferrite material, which is used to trigger the Hall effect sensor of the trigger switch 603. The groove body 406 is provided in the middle of the insulating rod 404, the groove wall is plated with copper to enhance the conductivity. The conductive block 407 is made of phosphor bronze alloy, the surface is plated with silver, which ensures low resistance contact. The spring 402 is connected between the bottom plate 403 and the trigger 401, and the hole body 3 is processed on the shell 1, and the hole body 3 is connected with the bottom plate 403.

[0088] In actual use:

[0089] The third position (passive response module 5 activated): manually drive the trigger 401 upward to overcome the pre-tightening force of the spring 402, and move to the third position; the insulating rod 404 drives the conductive block 407 to move upward synchronously, and the upper and lower surfaces of the conductive block 407 respectively realize surface contact with the output pad of the first chip 503 and the input pad of the first antenna 502; at this time, the circuit of the passive response module 5 is closed, and communication with the reader can be realized by electromagnetic induction.

[0090] The second position (active response module 6 activated): release the trigger 401, the spring 402 resets, and the trigger 401 moves downward to the second position; the trigger block 405 is close to the trigger switch 603, so that the Hall sensor outputs a low-level signal; after the second chip receives the signal, it outputs a high-level control relay to close, and activates the active response module 6.

[0091] The above specific embodiments do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent replacement and improvement made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An RFID tag having a remote data reading function, characterized by comprising: The application relates to an RFID tag, which comprises the following parts: a shell (1) and a cover (2) detachably connected to the shell (1); a main response module (6) and a passive response module (5) arranged in the shell (1); the main response module (6) is configured to support communication response with a reader in a long-distance range; the passive response module (5) is configured to support communication response with the reader in a short-distance range; a trigger mechanism (4) is connected with the main response module (6) and the passive response module (5), and the trigger mechanism (4) is used for starting the main response module (6) or the passive response module (5); the passive response module (5) comprises a first circuit board (501), a first chip (503) and a first antenna (502) integrated on the first circuit board (501); when the trigger mechanism (4) is in a first position, the trigger mechanism (4) keeps an open circuit between the first chip (503) and the first antenna (502), at this time, the first chip (503) is in an inactivated state and cannot respond to the signal of the reader; when the trigger mechanism (4) is in a third position, the trigger mechanism (4) forms a closed circuit between the first chip (503) and the first antenna (502); the main response module (6) comprises a second circuit board (601), a transmitting module (602) integrated on the second circuit board (601), a power supply unit (604) and a trigger switch (603), and the power output timing of the power supply unit (604) is controlled through the trigger switch (603); the trigger mechanism (4) comprises a trigger piece (401), an insulating rod (404), a trigger block (405), a groove body (406) and a conductive block (407); the trigger piece (401) is connected with the insulating rod (404), the insulating rod (404) penetrates through the first circuit board (501) and the shell (1), the insulating rod (404) is connected with the trigger block (405), the trigger block (405) can be in contact with the trigger switch (603), the groove body (406) is arranged on the insulating rod (404), and the conductive block (407) is connected in the groove body (406); when the trigger piece (401) moves in a direction away from the shell (1) and finally reaches the third position, the conductive block (407) is attached to the first chip (503) and the first antenna (502) respectively; when the trigger piece (401) moves in a direction close to the shell (1) and finally reaches a second position, the trigger block (405) is in contact with the trigger switch (603). The trigger mechanism (4) is driven in a manual mode; when the main response module (6) is invalid, the passive response module (5) is manually switched through the trigger mechanism (4) to trigger the short-distance response function of the RFID tag. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The RFID tag having a remote data reading function according to claim 1, characterized by, ​ ​ 3. The RFID tag having a remote data reading function according to claim 1, wherein, In the state of closed circuit, the first antenna (502) receives electromagnetic field generated by reader and generates induced current, which powers the first chip (503) and activates data processing function of the first chip (503), and the first chip (503) transmits stored data to the reader by realizing backscatter communication through modulating impedance of the first antenna (502).

4. The RFID tag having a remote data reading function according to claim 1, wherein, The trigger mechanism (4) forms a closed circuit between the first chip (503) and the first antenna (502) by mechanical contact closure.

5. The RFID tag having a remote data reading function according to claim 1, wherein, The transmitting module (602) further comprises: a transmitter configured to generate and modulate a radio frequency carrier signal; a second antenna configured to radiate the modulated radio frequency signal and receive interrogation signal of the reader; a second chip configured to: store unique identifier of the tag and sensing data; execute data encoding and decoding algorithm.

6. The RFID tag having a remote data reading function according to claim 5, wherein, When the trigger mechanism (4) is in the first position, the trigger switch (603) disconnects the power supply unit (604) from the transmitting module (602), and the transmitting module (602) is in dormant state; the power supply unit (604) only provides microampere level current to the second chip, which is used to maintain clock and trigger detection function of the second chip; When the trigger mechanism (4) is switched to the second position, the trigger mechanism (4) controls the power supply unit (604) to supply power to the transmitting module (602) and start the transmitting module (602) by triggering the trigger switch (603).

7. The RFID tag having a remote data reading function according to claim 1, wherein The height of the conductive block (407) is greater than the cross-sectional height of the first chip (503) and the first antenna (502).

8. The RFID tag having a remote data reading function according to claim 1, wherein, Further comprising a hole body (3), the trigger mechanism (4) further comprises a spring (402) and a bottom plate (403); the bottom plate (403) is connected with the hole body (3), and the bottom plate (403) is connected with the trigger piece (401) through the spring (402).

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