Energy self-sufficient efficient RFID inventory system

Abstract

The invention relates to the field of identification and radio frequency identification, in particular to an energy self-sufficient efficient RFID inventory system. Comprising an energy transmitting device, a reader, a first antenna and a tag, the tag comprises an energy capture module, a rectifier module, a tag chip and a second antenna; the reader transmits a first radio frequency electromagnetic wave to the tag through the first antenna, and the tag receives energy transmitted by the energy transmitting device, converts the energy into electric energy, provides energy for working of the tag, and reflects a second radio frequency electromagnetic wave signal with tag data; and the reader receives the second radio frequency electromagnetic wave signal to complete information interaction with the tag. On the premise that reader and antenna parameters of the whole system are not changed, external energy is converted into electric energy to charge the tag, the response sensitivity of the tag is improved, and the risk that the tag in a non-inventory area is misread is reduced.

Description

Technical Field

[0001] The present invention relates to the field of identification and radio frequency identification, and particularly to an energy self - sufficient and efficient RFID inventory system. Background Art

[0002] Radio Frequency Identification (RFID) is an efficient non - contact automatic identification technology, with the capabilities of long - distance reading, fast identification, and large - data storage, and has been widely used in multiple fields such as clothing retail, file management, and warehousing logistics. A standard RFID system consists of three parts: an RFID tag, a reader, and an antenna. The reader transmits a radio - frequency signal to the RFID tag through the antenna, provides energy for it, and performs an "inquiry". The activated tag reflects the stored information back to the reader and then transmits it to the upper - layer application system to achieve data control, storage, and management. The RFID tag consists of a tag antenna and a tag chip. The tag antenna is responsible for receiving the radio - frequency signal transmitted by the reader and converting it into energy for the tag chip to use. Only when the tag chip has sufficient energy can it be activated to execute the instructions of the reader. Passive RFID tags need to overcome a certain "starting potential well", similar to the need for sufficient force to overcome static friction when pushing a stationary cart.

[0003] In practical applications, limited by the reader design, the radio - frequency energy of the RFID antenna is not infinite. When a large number of dense tags need to be quickly inventoried, the radio - frequency energy may not be sufficient to activate all tags, affecting the inventory efficiency. To address this problem, the following strategies can be adopted: 1. Adjust the inventory strategy, reduce the number of tags inventoried at a time, and optimize the gain of the antenna in key areas. Although this method helps to ensure that each tag can be effectively read, it will indirectly affect the overall inventory efficiency. 2. Redesign the RFID antenna to enhance its directional gain in the inventory area. Such an antenna design can more effectively concentrate the radio - frequency signal on the target area. Although this will bring higher design and manufacturing costs, and since the antenna can only distribute energy spatially rather than increase energy, its effect may be limited. 3. Increase the radio - frequency energy transmitted from the reader to the RFID antenna. However, this method is limited by the upper limit of the reader's energy output, and excessive enhanced radio - frequency energy may cause tags in non - target areas to be wrongly activated, resulting in the "misreading" problem.

[0004] In the prior art: 1. The technology described in the patent No. CN204537194U relates to a dual - frequency tag system that uses high - frequency electromagnetic coupling technology to supplement energy for ultra - high - frequency tags. Through the principle of high - frequency electromagnetic coupling, this system provides additional energy for ultra - high - frequency tags, thus significantly improving the response sensitivity of the tags. Among them, the energy capture module is essentially a high - frequency RFID tag, which consumes a certain amount of energy in the working state. The working state of this module will affect the RFID tag, and further affect the ability of the tag to maintain continuous sensitivity when queried by the reader. It should be noted that due to the working state of the high - frequency tag, the sensitivity of the ultra - high - frequency RFID tag may suddenly increase. 2. The technology described in the patent No. CN103136574B provides an ultra - high - frequency electronic tag and its sensitivity configuration method. This method realizes the adjustment of the tag sensitivity through the cooperation of the load resistance inside the tag and the voltage detection module. However, the energy source of this solution is still the radio - frequency electromagnetic energy received by the tag antenna. Therefore, the maximum sensitivity of the tag has not been substantially improved, but only selected and configured within a preset range of several gears. Summary of the Invention

[0005] The present invention mainly solves the problem that in an RFID inventory system, when rapid and large - scale inventory is required, the response ability of RFID tags is insufficient due to their passive characteristics, resulting in low inventory efficiency. It provides an innovative energy - self - sufficient and efficient RFID inventory system. This system provides additional energy supply for RFID tags through the cooperation of an energy - emitting device and an energy - capture module, reduces the radio - frequency energy required to activate the tags, improves the response sensitivity of RFID tags, and improves the inventory efficiency without changing the parameters of the reader and the antenna.

[0006] The technical solution of the present invention is as follows:

[0007] An energy - self - sufficient and efficient RFID inventory system, characterized by comprising: an energy - emitting device, a reader, a first antenna, and a tag; the tag includes: an energy - capture module, a rectification module, a tag chip, and a second antenna;

[0008] The reader emits a first radio - frequency electromagnetic wave to the tag through the first antenna, and the energy - emitting device can at least radiate one of sound, light, heat, electricity, or magnetic energy;

[0009] The energy - capture module receives the energy emitted by the energy - emitting device and converts it into electrical energy to be transmitted to the rectification module;

[0010] The rectification module rectifies, stabilizes the voltage, and filters the received electrical energy to supply power for the operation of the tag;

[0011] The second antenna receives the first radio frequency electromagnetic wave signal emitted by the first antenna and transmits it to the tag chip;

[0012] The tag chip receives the first radio frequency electromagnetic wave signal and reflects a second radio frequency electromagnetic wave signal with tag data through the second antenna;

[0013] The reader receives the second radio frequency electromagnetic wave signal through the first antenna to complete information interaction with the tag.

[0014] Furthermore, the energy emitting device is one of a lighting device, a heating element array, or an electromagnetic emitting device.

[0015] Furthermore, the energy capture module is one of a photovoltaic power generation panel, a micro thermocouple, or a micro electromagnetic induction element.

[0016] Furthermore, the lighting device includes but is not limited to: energy-saving lamps, LED lamps, ultraviolet lamps, solar lamps, metal halide lamps; the electromagnetic emitting device includes but is not limited to: electromagnetic induction coils, microwave transmitters; the heating element array includes but is not limited to: heat source bulb arrays, thermocouple arrays, PTC heater arrays.

[0017] Furthermore, the reader is electrically connected to the first antenna to control the magnitude of the first radio frequency electromagnetic wave emitted by the first antenna, thereby controlling the intensity and range of the radio frequency electromagnetic field.

[0018] Furthermore, the intersection of the radio frequency electromagnetic field range emitted by the first antenna and the energy coverage range radiated by the energy emitting device is the inventory area.

[0019] Furthermore, the number of the energy emitting devices is not less than 1, and the energy coverage range radiated by the energy emitting devices is within the radio frequency electromagnetic field range emitted by the first antenna.

[0020] Furthermore, the tag chip is provided with a radio frequency interface circuit and a logic processing unit, and the second antenna transmits the first radio frequency electromagnetic wave signal to the tag chip through the radio frequency interface circuit.

[0021] Furthermore, the tag chip is not provided with a power management circuit and does not receive the energy from the first radio frequency electromagnetic wave signal for power supply.

[0022] Furthermore, the rectification, voltage regulation, and filtering process is: converting the electric energy with unstable voltage phase and amplitude transmitted by the energy capture module into a power supply with a stable voltage amplitude to supply power for the operation of the tag chip.

[0023] The present invention has the following beneficial effects:

[0024] 1. An RFID anti-misreading inventory system according to the present invention has a simple system composition structure. Without changing the reader and antenna parameters of the entire system, through the cooperation of an energy emission device and an energy capture module, the response sensitivity of tags is improved, the inventory efficiency in the case of a large number of tags in a short time is increased, and efficient inventory with anti-misreading is achieved.

[0025] 2. Whether a tag responds to a radio frequency signal in an RFID anti-misreading inventory system according to the present invention depends on the design of the energy emission device and the energy capture module, rather than the radio frequency electromagnetic field intensity of a traditional system. This avoids problems such as instability and susceptibility to interference existing in the propagation of radio frequency energy due to the complexity of the on-site environment, thereby improving the reliability of the inventory system.

[0026] 3. The energy emission device in an RFID anti-misreading inventory system according to the present invention can select the radiation type according to requirements. For example, in a dim light or low-temperature environment, corresponding types of light energy and heat energy radiation can be selected to enhance the adaptability of the inventory system in different usage environments.

[0027] 4. In an RFID anti-misreading inventory system according to the present invention, a power management circuit is not provided inside the tag chip, and the first antenna is only used for receiving input signals and does not provide energy. Whether the tag is activated is completely determined by the electric energy converted by the energy capture module. This design reduces the design difficulty of the tag chip and also avoids the problem of possible power conflicts between the inside of the tag chip and the rectification module. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the present invention;

[0029] Figure 2 is a schematic diagram of Embodiment 1 of the present invention;

[0030] Figure 3 is a schematic diagram of Embodiment 2 of the present invention;

[0031] Figure 4 is a schematic diagram of Embodiment 3 of the present invention.

[0032] Reference numerals: 100 - energy emission device; 200 - reader; 300 - first antenna; 400 - tag; 410 - energy capture module; 420 - rectification module; 430 - tag chip; 440 - second antenna; 101 - lighting device; 102 - heating element array; 103 - electromagnetic emission device; 411 - photovoltaic power generation panel; 412 - micro thermocouple; 413 - micro electromagnetic induction element, 500 - goods / products with tags; 600 - light shielding device; 700 - mobile trolley; 800 - shopping device.

[0033] A - Inventory area; B - Non - inventory area; C - Operation counter or settlement counter; C1 - Settlement area; C2 - Waiting area; D - Passage door. Detailed implementation

[0034] RFID tags are passive devices with a certain "starting potential well". Similar to giving a stationary cart enough thrust to overcome static friction to make it move, whether an RFID tag can respond to the radio - frequency signal emitted by a reader depends on whether the energy of the radio - frequency signal received by the tag antenna is strong enough to overcome its "starting potential well". However, in practical applications, the energy of the radio - frequency electromagnetic wave emitted by an RFID antenna cannot be infinite. Firstly, the reader itself has a limit on the transmission power. Secondly, if the energy of the radio - frequency electromagnetic wave emitted by the RFID antenna is very large, it is very likely to activate some tags that are not intended to be inventoried, resulting in the so - called "misreading" phenomenon. At the same time, the radio - frequency electromagnetic wave has phenomena such as reflection and scattering during propagation, and is easily interfered by the external environment, affecting the reliability of the inventory system. Therefore, in some application scenarios where a large number of tags need to be inventoried and there are requirements for anti - misreading, due to the passive characteristics of the tags and the instability of the radio - frequency energy, problems such as low inventory efficiency and easy misreading will occur.

[0035] The present invention, as Figure 1 shown, includes an energy - emitting device 100, a reader 200, a first antenna 300, and a tag 400; the tag 400 includes: an energy - capturing module 410, a rectifying module 420, a tag chip 430, and a second antenna 440. Without changing the parameters of the reader 200 and the antenna 300 of the whole system, through the cooperation of the energy - emitting device 100 and the energy - capturing module 410, external energy is converted into electrical energy to charge the tag 400. And the type of energy radiated by the energy - emitting device 100 can be selected according to actual needs. For example, the tags 400 in the non - inventory area A are packed in boxes and the light is dim, and the type of radiated energy can be selected as light energy; the tags 400 in the non - inventory area B are stored in a cold storage with a low temperature, and the type of radiated energy can be selected as heat energy.

[0036] Embodiment 1

[0037] An energy - self - sufficient and efficient RFID inventory system applied to the inventory scenario of small - piece goods in a warehouse, as Figure 1 、 2 shown.

[0038] Including: an energy emission device 100, a reader 200, a first antenna 300, a tag 400 which is an RFID tag, goods 500 with the RFID tag attached, and an operation counter C; the tag 400 includes: an energy capture module 410, a rectification module 420, a tag chip 430, and a second antenna 440. The energy emission device 100 is a lighting device 101. Specifically, the lighting device 101 includes, but is not limited to, energy-saving lamps, LED lamps, ultraviolet lamps, solar lamps, metal halide lamps, and other devices that provide light energy. The energy capture module 410 is a photovoltaic panel 411. The number of the energy emission devices 100 is not less than 1, and the energy coverage range radiated by the energy emission device 100 is within the radio frequency electromagnetic field range emitted by the first antenna 300.

[0039] The reader 200 emits a first radio frequency electromagnetic wave to the tag 400 through the first antenna 300, and the energy emission device 100 can radiate light energy. The non-inventory area B is located on the side of the operation counter C and the corner area of the ground. A light-shielding device 600, such as a cardboard box, is placed in the non-inventory area B. The light-shielding device 600 contains stacked goods 500. The inventory area A is located at the center of the operation counter C, and lighting devices 101 are installed on the upper and lower sides, with the light direction towards the center of the inventory area A. A reader 200 and a first antenna 300 are installed in the inventory area A. The radiation energy of the first antenna 300 needs to ensure that all tags 400 in the inventory area A can receive radio frequency "inquiry" signals. For the goods 500 placed in the light-shielding devices 600 in the two non-inventory areas B, since the light-shielding device 600 blocks the light, the tag 400 cannot receive the light energy emitted by the lighting device 101 to provide energy for the tag chip 430 and does not respond to the radio frequency electromagnetic wave of the first antenna 300.

[0040] Randomly take out several goods 500 from the light-shielding device 600 and place them in the inventory area. The light emitted by the lighting device 101 in the inventory area A shines on the goods 500 with the RFID tag attached. The energy capture module 410 receives the energy emitted by the lighting device 101 and converts it into electrical energy and transmits it to the rectification module 420.

[0041] The rectification module 420 rectifies, stabilizes the voltage, and filters the received electrical energy and supplies it to the tag chip 430.

[0042] The second antenna 440 receives the first radio frequency electromagnetic wave signal emitted by the first antenna 300 and transmits it to the tag chip 430.

[0043] The tag chip 430 receives the first radio frequency electromagnetic wave signal and reflects a second radio frequency electromagnetic wave signal with tag data through the second antenna 440.

[0044] The reader 200 receives a second radio frequency electromagnetic wave signal through the first antenna 300 to complete information interaction with the tag 400.

[0045] The reader 200 is electrically connected to the first antenna 300 to control the magnitude of the first radio frequency electromagnetic wave emitted by the first antenna 300, thereby controlling the intensity and range of the radio frequency electromagnetic field.

[0046] The intersection of the radio frequency electromagnetic field range emitted by the first antenna 300 and the energy coverage range radiated by the energy emitting device 100 is the inventory area A.

[0047] The tag chip 430 is provided with a radio frequency interface circuit and a logic processing unit, and the second antenna 440 transmits the first radio frequency electromagnetic wave signal to the tag chip 430 through the radio frequency interface circuit.

[0048] The tag chip 430 is not provided with a power management circuit and does not receive the energy from the first radio frequency electromagnetic wave signal for power supply.

[0049] The rectification, voltage regulation, and filtering process is as follows: converting the electric energy with unstable voltage phase and amplitude transmitted by the energy capture module 410 into a power supply with a stable voltage amplitude and then supplying it to the tag chip 430.

[0050] Embodiment 2

[0051] An energy self - sufficient and efficient RFID inventory system applied to the scenario of the cold chain warehouse passage door D, as Figure 1 、 3 shown.

[0052] It includes: an energy emitting device 100, a reader 200, a first antenna 300, goods 500 with RFID tags attached, and a passage door D; the tag 400 includes: an energy capture module 410, a rectification module 420, a tag chip 430, and a second antenna 440. The energy emitting device 100 is a heating element array 102. Specifically, the heating element array 102 includes, but is not limited to, devices that provide heat energy such as a heat source light bulb array, a thermocouple array, a PTC heater array, etc. The energy capture module 410 is a micro - thermocouple 412. The number of the energy emitting devices 100 is not less than 1, and the energy coverage range radiated by the energy emitting device 100 is within the radio frequency electromagnetic field range emitted by the first antenna 300.

[0053] The reader 200 emits a first radio frequency electromagnetic wave to the tag 400 through the first antenna 300, and the energy emitting device 100 radiates heat energy. The reader 200 and the first antenna 300 are installed above the access door D. The radiation direction of the radio frequency electromagnetic wave of the first antenna 300 is downward. The radio frequency energy is controlled by the reader 200 to ensure that all tags 400 in the inventory area A can receive the radio frequency "inquiry" signal. Heating element arrays 102 are fixedly installed on both sides of the access door D, which can generate thermal radiation to the surroundings, heat the air inside the access door D, and make the temperature in the inventory area A significantly higher than that in the non-inventory area B. There is a mobile trolley 700 outside the access door D, and goods 500 are loaded in the trolley.

[0054] Pushing the mobile trolley 700 loaded with goods 500 from outside the access door D towards the access door D. When the trolley reaches the inventory area A, due to the special environment of the cold chain warehouse and the function of the heating element arrays 102 installed on the access door D, the temperature in the inventory area A is significantly higher than that on both sides inside and outside the access door D. The micro thermocouple 412 in the tag 400 absorbs heat energy and converts it into electrical energy, which is transmitted to the rectification module 420. For the tags 400 in the mobile trolley 700 outside the door, due to the relatively low surrounding temperature, the micro thermocouple 412 in the tags 400 cannot collect enough heat energy to be converted into electrical energy to supply power to the tag chip 430, and thus does not respond to the radio frequency electromagnetic wave of the first antenna 300.

[0055] The rectification module 420 rectifies, stabilizes the voltage and filters the received electrical energy, and supplies it to the tag chip 430.

[0056] The second antenna 440 receives the first radio frequency electromagnetic wave signal emitted by the first antenna 300 and transmits it to the tag chip 430.

[0057] The tag chip 430 receives the first radio frequency electromagnetic wave signal and reflects a second radio frequency electromagnetic wave signal with tag data through the second antenna 440.

[0058] The reader 200 receives the second radio frequency electromagnetic wave signal through the first antenna 300 to complete the information interaction with the tag 400. After the goods 500 in the trolley are unloaded in the warehouse, the empty trolley is pushed outside the access door D, refilled with goods 500, and the next round of inventory begins.

[0059] The reader 200 is electrically connected to the first antenna 300 to control the magnitude of the first radio frequency electromagnetic wave emitted by the first antenna 300, and thus control the intensity and range of the radio frequency electromagnetic field.

[0060] The intersection of the radio frequency electromagnetic field range emitted by the first antenna 300 and the energy coverage range radiated by the energy emitting device 100 is the inventory area A. That is, the ground range covered by the access door D belongs to the inventory area A, and the remaining ground range belongs to the non-inventory area B.

[0061] The tag chip 430 is provided with a radio frequency interface circuit and a logic processing unit, and the second antenna 440 transmits a first radio frequency electromagnetic wave signal to the tag chip 430 through the radio frequency interface circuit.

[0062] The tag chip 430 is not provided with a power management circuit and does not receive the energy from the first radio frequency electromagnetic wave signal for power supply.

[0063] The rectification, voltage regulation and filtering process is as follows: the electric energy with unstable voltage phase and amplitude transmitted by the energy capture module 410 is converted into a power supply with stable voltage amplitude and then supplied to the tag chip 430.

[0064] Embodiment 3

[0065] An energy self-sufficient and efficient RFID inventory system applied to the retail settlement scenario, as Figure 1 、 4 shown.

[0066] It includes: an energy emitting device 100, a reader 200, a first antenna 300, a commodity 500 with an RFID tag, and a settlement counter C; the tag 400 includes: an energy capture module 410, a rectification module 420, a tag chip 430, and a second antenna 440. The energy emitting device 100 is an electromagnetic emitting device 103. Specifically, the electromagnetic emitting device 103 includes, but is not limited to, devices that generate electromagnetic energy such as electromagnetic induction coils and microwave transmitters. The energy capture module 410 is a micro electromagnetic induction element 413. The number of the energy emitting devices 100 is not less than 1, and the energy coverage range radiated by the energy emitting device 100 is within the radio frequency electromagnetic field range emitted by the first antenna 300.

[0067] The reader 200 emits a first radio frequency electromagnetic wave to the tag 400 through the first antenna 300, and the energy emission device 100 radiates electromagnetic wave energy. On the left side of the checkout counter C, a checkout area C1, which is also the inventory area A, is demarcated, and on the right side, a waiting area C2, which is also the non-inventory area B, is demarcated. Above the checkout area C1, the first antenna 300 is installed, and on the left side, the reader 200 is installed. For aesthetics, the reader 200 and the antenna can be installed inside the cabinet. The radiation direction of the first antenna 300's radio frequency electromagnetic wave is towards the checkout area C1, and the energy is controlled by the reader 200 to ensure that all tags 400 within the inventory area A can receive the radio frequency "inquiry" signal; below the checkout area C1, an electromagnetic emission device 103 is fixedly installed. After the electromagnetic emission device 103 is powered on, an alternating current with a certain frequency passes through, and the energy of the alternating current will not interfere with the radio frequency signal of the first antenna 300. In the waiting area C2, there is a shopping device 800, such as a shopping basket or a shopping cart. The shopping device 800 contains the goods 500 purchased by the customer, and RFID tags 400 are attached to the surface of the goods 500.

[0068] The shopping device 800 is placed in the waiting area C2. After the cashier finishes the previous round of settlement operation, the shopping device 800 in the waiting area C2 is moved to the checkout area C1. At this time, an electromagnetic induction effect similar to wireless charging is generated between the electromagnetic emission device 103 below the checkout area C1 and the micro electromagnetic induction element 413 in the tag 400, generating a certain current and transmitting it to the rectification module 420.

[0069] The rectification module 420 rectifies, stabilizes the voltage, and filters the received electric energy, and supplies it to the tag chip 430.

[0070] The second antenna 440 receives the first radio frequency electromagnetic wave signal emitted by the first antenna 300 and transmits it to the tag chip 430.

[0071] The tag chip 430 receives the first radio frequency electromagnetic wave signal and reflects a second radio frequency electromagnetic wave signal with tag data through the second antenna 440.

[0072] The reader 200 receives the second radio frequency electromagnetic wave signal through the first antenna 300, completing the information interaction with the tag 400. The types, quantities, etc. of the goods 500 are counted and the final amount is calculated, which is displayed on the settlement interface of the computer, completing the settlement task for this time. After the customer completes the payment, the cashier moves the shopping device 800 of the next customer placed in the waiting area C2 to the checkout area C1 to start the next round of settlement.

[0073] The reader 200 is electrically connected to the first antenna 300, controlling the magnitude of the first radio frequency electromagnetic wave emitted by the first antenna 300, and thus controlling the intensity and range of the radio frequency electromagnetic field.

[0074] The intersection of the radio frequency electromagnetic field range emitted by the first antenna 300 and the energy coverage range radiated by the energy emitting device 100 is the inventory area A.

[0075] The tag chip 430 is provided with a radio frequency interface circuit and a logic processing unit, and the second antenna 440 transmits a first radio frequency electromagnetic wave signal to the tag chip 430 through the radio frequency interface circuit.

[0076] The tag chip 430 is not provided with a power management circuit and does not receive the energy from the first radio frequency electromagnetic wave signal for power supply.

[0077] The rectification, voltage regulation and filtering process is: converting the electric energy with unstable voltage phase and amplitude transmitted by the energy capture module 410 into a power supply with stable voltage amplitude and then supplying it to the tag chip 430.

[0078] The above are only embodiments of the present invention. The selection of the embodiment solutions is only for better understanding the content of the invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present invention by the same token.

Claims

1. An energy-self-sufficient and efficient RFID inventory system, characterized in that: include: Energy transmitting device (100), reader (200), first antenna (300), tag (400); The tag (400) comprises: an energy capture module (410), a rectifier module (420), a tag chip (430), and a second antenna (440); The reader (200) transmits a first radio frequency electromagnetic wave to the tag (400) via the first antenna (300), and the energy transmitting device (100) is capable of radiating at least one of sound, light, heat, electricity or magnetic energy; The energy capture module (410) receives energy emitted by the energy emission device (100), converts the energy into electrical energy and transmits it to the rectification module (420); The rectifier module (420) performs rectification, voltage stabilization and filtering on the received electric energy and supplies it to the tag (400) for operation; The second antenna (440) receives the first radio frequency electromagnetic wave signal emitted by the first antenna (300) and transmits it to the tag chip (430); The tag chip (430) receives a first radio frequency electromagnetic wave signal, and reflects a second radio frequency electromagnetic wave signal carrying tag data through the second antenna (440); The reader (200) receives the second radio frequency electromagnetic wave signal through the first antenna (300) to complete information interaction with the tag (400).

2. The energy-self-sufficient and efficient RFID inventory system according to claim 1, characterized in that: The energy emission device (100) is one of a lighting device (101), a heating element array (102) or an electromagnetic emission device (103).

3. The energy-self-sufficient and efficient RFID inventory system according to claim 1, characterized in that: The energy capture module (410) is one of a photovoltaic panel (411), a micro thermocouple (412) or a micro electromagnetic induction element (413).

4. The energy-self-sufficient and efficient RFID inventory system according to claim 2, characterized in that: The lighting equipment (101) includes but is not limited to: energy-saving lamps, LED lamps, ultraviolet lamps, solar lamps, and metal halide lamps; the heating element array (102) includes but is not limited to: a heat source bulb array, a thermocouple array, and a PTC heater array; the electromagnetic transmitting device (103) includes but is not limited to: an electromagnetic induction coil and a microwave transmitter.

5. The energy-self-sufficient and efficient RFID inventory system according to claim 1, characterized in that: The reader (200) is electrically connected to the first antenna (300) to control the size of the first radio frequency electromagnetic wave emitted by the first antenna (300), thereby controlling the intensity and range of the radio frequency electromagnetic field.

6. The energy-self-sufficient and efficient RFID inventory system according to claim 1, characterized in that: The intersection of the radio frequency electromagnetic field range emitted by the first antenna (300) and the energy coverage range radiated by the energy emitting device (100) is the inventory area (A).

7. The energy-self-sufficient and efficient RFID inventory system according to claim 6, characterized in that: The number of the energy transmitting devices (100) is not less than 1, and the energy coverage range radiated by the energy transmitting devices (100) is within the range of the radio frequency electromagnetic field emitted by the first antenna (300).

8. The energy-self-sufficient and efficient RFID inventory system according to claim 1, characterized in that: The tag chip (430) is provided with a radio frequency interface circuit and a logic processing unit, and the second antenna (440) transmits a first radio frequency electromagnetic wave signal to the tag chip (430) through the radio frequency interface circuit.

9. The energy-self-sufficient and efficient RFID inventory system according to claim 1, characterized in that: The tag chip (430) is not provided with a power management circuit and does not receive energy from the first radio frequency electromagnetic wave signal for power supply.

10. The energy-self-sufficient and efficient RFID inventory system according to claim 1, characterized in that: The rectification, voltage stabilization and filtering process is to convert the electric energy with unstable voltage phase and amplitude transmitted from the energy capture module (410) into a power source with stable voltage amplitude and then supply it to the tag chip (430) for operation.

Images