Book collection and editing equipment, RFID reading method and RFID reader

Abstract

The present invention relates to the technical field of radio frequency identification. In order to reduce the false rejection rate of book collection and editing equipment, a book collection and editing equipment and an RFID reading method thereof and an RFID reader are provided. The method comprises: the RFID reader sends an excitation signal to excite the RFID tag to work; the RFID reader receives a reading signal sent by the RFID tag; the excitation signal is digitized to obtain an excitation digital signal, and the reading signal is digitized to obtain a reading digital signal; the first N bits of the excitation digital signal are intercepted as a comparison digital signal; the comparison digital signal is compared with the reading digital signal to obtain a plurality of similar segments in the reading digital signal; the time delay of a noise component corresponding to each similar segment relative to the excitation signal is obtained, and the ratio of the noise component corresponding to each similar segment to the amplitude of the excitation signal is calculated; a plurality of noise components are fitted; a target signal is obtained according to the reading signal and the plurality of noise components, and information to be read by the RFID reader is obtained according to the target signal.

Description

Technical Field

[0001] The present invention relates to the field of radio frequency identification technology, and in particular to a book collecting and editing device and an RFID reading method and an RFID reader. Background Art

[0002] The library has a huge collection of books. In order to facilitate the retrieval, placement, borrowing and returning of books, labels containing the book title, call number, collection number, shelf number, etc. are generally affixed to the books during the book collection and editing work.

[0003] In order to save manpower and improve the efficiency of book collection and editing, the current relevant technology has developed automated book collection and editing equipment. For example, the previously applied Chinese patent CN114524218B discloses an automated book collection and editing equipment that can paste labels on the spine, the back cover and the inner title page of the book according to the relevant requirements of the user. Among them, the inner title page of the book is pasted with an RFID (Radio Frequency Identification) tag. As described in step 5 of the above patent, after the RFID tag is pasted, the book is sent into the sensing area of ​​the information writing device by the transmission mechanism, and the RFID tag pasted in the book is written with the specified information in the sensing area of ​​the information writing device. After the information is written, the transmission mechanism sends the book into the sensing area of ​​the reading device, and the reading device reads the information of the RFID tag in the book and judges it through the system. When the system judges that the information written in the RFID tag is correct, the transmission mechanism transmits the book to the qualified area. When the system judges that the information written in the RFID tag is wrong, the book is kicked out to the unqualified area through the kicking mechanism. When the above equipment is actually used, the proportion of books kicked out to the unqualified area is relatively high. Summary of the invention

[0004] The inventor of the present application has found through research on the above scheme that the information in the RFID tags of most of the books that are kicked out to the unqualified area is correct, but they are still judged by the system as written information errors, indicating that there are problems when the reading device reads the tag information, including reading failure, incomplete reading information, and incorrect reading information, which will cause the book to be kicked out to the unqualified area. The inventor of the present application has found in further research on the above equipment that the radio frequency signal components received by the reading device are complex and contain some noises with obvious characteristics. After analysis, since the book RFID tag adopts a passive tag, the reading device not only receives the signal but also sends the signal to the RFID tag when reading the tag information. Many of the above noises are caused by the reading device sending the signal to the RFID tag. On the one hand, when the sending and receiving antennas of the reading device are shared, the leakage of the directional device (such as a circulator) causes the component of the sending signal to enter the receiving channel. On the other hand, the tag reading station has a relatively complex mechanical structure such as plates and rods. The signal sending and receiving environment will have signal reflections, and the sent signal will be received by the reading device after reflection.

[0005] How to effectively remove these noises and achieve effective extraction of target signals, thereby improving the success rate and accuracy of RFID tag information reading and reducing the false rejection rate of book editing and compiling equipment, is a technical problem that urgently needs to be solved.

[0006] In order to solve the above technical problems, the present invention provides a book collecting and editing device and its RFID reading method, and an RFID reader, which can effectively estimate the noise components generated by the excitation signal in the RFID reader reading signal, thereby effectively removing these noise components, realizing effective extraction of the target signal, improving the success rate and accuracy of RFID tag information reading, and reducing the false rejection rate of the book collecting and editing device.

[0007] The technical solution adopted by the present invention is as follows:

[0008] An RFID reading method for book collection and editing equipment comprises the following steps: S1, when a book with an RFID tag attached reaches the identification range of an RFID reader, the RFID reader sends an excitation signal to excite the RFID tag to work, wherein the RFID tag is a passive tag; S2, the RFID reader receives a read signal sent by the RFID tag, wherein the read signal comprises a target signal and a plurality of noise components, wherein the target signal contains information to be read by the RFID reader, and the noise component is generated by the excitation signal; S3, digitizing the excitation signal to obtain an excitation digital signal, and digitizing the read signal to obtain a read digital signal, wherein the sampling interval for digitizing the read signal and the sampling interval for digitizing the excitation signal are the same, and the number of quantization bits are both 1; S4, intercepting the first N bits of the excitation digital signal as a comparison digital signal, where N is a positive integer; S5, comparing the comparison digital signal with the read digital signal to obtain a plurality of similar segments in the read digital signal; S6, obtaining the time delay of the noise component corresponding to each of the similar segments relative to the excitation signal, and calculating the ratio of the noise component corresponding to each of the similar segments to the amplitude of the excitation signal; S7, fitting the plurality of noise components according to the time delay of the noise component corresponding to each of the similar segments relative to the excitation signal, the ratio of the noise component corresponding to each of the similar segments to the amplitude of the excitation signal, and the excitation signal; S8, obtaining the target signal according to the read signal and the plurality of noise components, and obtaining the information to be read by the RFID reader according to the target signal.

[0009] In step S3, when the excitation signal or the read signal is digitized, a sampling point corresponds to a bit of the excitation digital signal or the read digital signal, wherein the absolute value of the sampling value is greater than or equal to the quantization threshold and is quantized as 1, and the absolute value of the sampling value is less than the quantization threshold and is quantized as 0.

[0010] Step S5 specifically includes: S501, initializing i=1; S502, intercepting the i-th bit to the i+N-1-th bit of the read digital signal as a signal segment; S503, calculating the similarity parameter between the comparison digital signal and the signal segment, if the similarity parameter is greater than the similarity threshold, the signal segment is recorded as a similar segment; S504, judging whether a preset number of similar segments have been obtained, or i+N-1 is the last bit of the read digital signal, if yes, end the current step S5, if not, execute step S505; S505, set i=i+1, and return to step S502.

[0011] The similarity parameter between the comparison digital signal and the signal segment is calculated according to the following formula:

[0012]

[0013] Wherein, S represents the similarity parameter between the comparison digital signal and the signal segment, α j is the jth bit in the comparison digital signal, β j is the jth bit in the signal segment.

[0014] The sampling time corresponding to the first bit of the similar segment is the time delay.

[0015] The ratio of the noise component corresponding to the similar segment to the amplitude of the excitation signal is calculated according to the following formula:

[0016]

[0017] Among them, A k represents the ratio of the noise component corresponding to the kth similar segment to the amplitude of the excitation signal, t k represents the sampling time of the kth similar segment, ta1 is the sampling time of the first bit of the similar segment, taN is the sampling time of the Nth bit of the similar segment, V s (t k ) indicates that the similar segment is at sampling time t k t0 represents the sampling time of the comparison digital signal, tb1 is the sampling time of the first bit of the comparison digital signal, tbN is the sampling time of the Nth bit of the comparison digital signal, V c (t0) represents the sampling value of the comparison digital signal at the sampling time t0, ω is the frequency of the excitation signal, and θ is the phase of the excitation signal.

[0018] The excitation signal is x(t), and the multiple noise components are:

[0019]

[0020] Where I(t) represents the multiple noise components, M is the total number of noise components, T k It represents the time delay of the noise component corresponding to the kth similar segment relative to the excitation signal.

[0021] An RFID reader includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the RFID reading method of the book acquisition and editing device is implemented.

[0022] A book collecting and editing device comprises the above-mentioned RFID reader.

[0023] Beneficial effects of the present invention:

[0024] The present invention digitizes the excitation signal and the read signal, and compares them to obtain multiple similar segments in the read digital signal, then fits the corresponding multiple noise components according to the multiple similar segments, finally obtains the target signal, and obtains the RFID tag information from the target signal. Therefore, the noise component generated by the excitation signal in the read signal of the RFID reader can be effectively estimated, so as to effectively remove these noise components, realize the effective extraction of the target signal, improve the success rate and accuracy of RFID tag information reading, and reduce the false rejection rate of book collection and editing equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention is a flowchart of an RFID reading method for a book collecting and editing device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1 As shown, the RFID reading method of the book collecting and editing device in the embodiment of the present invention includes the following steps S1 to S8.

[0028] S1, when a book with an RFID tag attached reaches the identification range of an RFID reader, the RFID reader sends an excitation signal to excite the RFID tag to work, wherein the RFID tag is a passive tag.

[0029] S2, the RFID reader receives a read signal sent by the RFID tag, wherein the read signal includes a target signal and multiple noise components, the target signal contains information to be read by the RFID reader, and the noise component is generated by the excitation signal.

[0030] The target signal is the signal sent by the RFID tag, and the noise component is generated by the leakage of the excitation signal from the directional device of the antenna or the reflection of the excitation signal from the environment.

[0031] S3, digitizing the excitation signal to obtain an excitation digital signal, and digitizing the read signal to obtain a read digital signal, wherein the sampling interval for digitizing the read signal and the excitation signal is the same, and the number of quantization bits is both 1.

[0032] In an embodiment of the present invention, the excitation digital signal and the read digital signal are generated by sampling and binary quantizing the corresponding excitation signal and the read signal, respectively. Specifically, when the excitation signal or the read signal is digitized, one sampling point corresponds to one bit of the excitation digital signal or the read digital signal, wherein the absolute value of the sampled value is greater than or equal to the quantization threshold and the quantization is 1, and the absolute value of the sampled value is less than the quantization threshold and the quantization is 0.

[0033] In one embodiment of the present invention, the quantization threshold may be 1 / 4 of the effective value of the excitation signal. It should be noted that the embodiment of the present invention only considers relatively large noise components, and does not consider relatively small noise components that will not cause RFID tag information reading failure, incompleteness or error.

[0034] S4, intercepting the first N bits of the exciting digital signal as a comparison digital signal, where N is a positive integer.

[0035] In one embodiment of the present invention, N is a preset value. A suitable N value can improve the accuracy of the noise component estimation in the subsequent steps S5 to S7. The N value is related to the frequency of the transmitted and received signals and the sampling interval in step S3 and other parameters and conditions, and can be set through experiments. It is not convenient to limit it to a specific value here. According to the actual implementation experience of the inventor of the present invention, the N value is mostly between 40 and 100.

[0036] S5, comparing the comparison digital signal with the read digital signal to obtain a plurality of similar segments in the read digital signal.

[0037] Step S5 specifically includes S501 to S505.

[0038] S501, initialize i=1.

[0039] S502, intercepting the i-th bit to the i+N-1-th bit of the read digital signal as a signal segment.

[0040] S503, calculating a similarity parameter between the compared digital signal and the signal segment, and if the similarity parameter is greater than a similarity threshold, recording the signal segment as a similar segment.

[0041] In one embodiment of the present invention, the similarity parameter between the comparison digital signal and the signal segment may be calculated according to the following formula:

[0042]

[0043] Among them, S represents the similarity parameter between the digital signal and the signal fragment, α j To compare the jth bit in the digital signal, β j is the jth bit in the signal segment.

[0044] The calculation formula of the similarity parameter above actually calculates the number of bits in the same position and with the same bit value (same 0 or same 1) between the compared digital signal and the signal segment. The similarity threshold is also preset, for example, N / 2.

[0045] If the similarity parameter is not greater than the similarity threshold, the subsequent step S504 is continued.

[0046] S504, determining whether a preset number of similar segments have been obtained, or i+N-1 is the last bit of the read digital signal, if yes, then ending the current step S5, if no, then executing step S505.

[0047] Since the time for RFID tags to send useful signals is limited, in order to avoid wasting computing resources, the embodiment of the present invention only considers a preset number of noise components, so the acquisition process of similar fragments ends when the preset number of similar fragments is obtained. The value of the preset number also depends on the actual situation and can also be set through experiments. In some embodiments of the present invention, it can be 8 to 15.

[0048] S505, set i=i+1, and return to step S502.

[0049] S6, obtaining the time delay of the noise component corresponding to each similar segment relative to the excitation signal, and calculating the ratio of the amplitude of the noise component corresponding to each similar segment to the excitation signal.

[0050] In one embodiment of the present invention, the sampling time corresponding to the first bit of the similar segment is the time delay of the noise component corresponding to the similar segment relative to the excitation signal. It should be noted that in the embodiment of the present invention, the excitation signal and the read signal are considered to be synchronized, so that the time delay of the noise component relative to the excitation signal can be equal to the time delay of the noise component relative to the read signal, and the correlation operation of the signal in the subsequent S8 can be implemented.

[0051] In one embodiment of the present invention, the ratio of the noise component corresponding to the similar segment to the amplitude of the excitation signal can be calculated according to the following formula:

[0052]

[0053] Among them, A k represents the ratio of the noise component corresponding to the k-th similar segment to the amplitude of the excitation signal. The noise component corresponding to the k-th similar segment is also the k-th noise component. k represents the sampling time of the kth similar segment, ta1 is the sampling time of the first bit of the similar segment, taN is the sampling time of the Nth bit of the similar segment, V s (t k ) indicates that the similar segment is at sampling time tk The sampling value of t0 represents the sampling time of the comparison digital signal, tb1 represents the sampling time of the first bit of the comparison digital signal, tbN represents the sampling time of the Nth bit of the comparison digital signal, and the first to Nth bits of the comparison digital signal are also the first to Nth bits of the excitation digital signal. c (t0) represents the sampling value of the comparison digital signal at the sampling time t0, ω is the frequency of the excitation signal, and θ is the phase of the excitation signal.

[0054] S7, fitting multiple noise components according to the time delay of the noise component corresponding to each similar segment relative to the excitation signal, the amplitude ratio of the noise component corresponding to each similar segment to the excitation signal, and the excitation signal.

[0055] If the excitation signal is represented as x(t), then the multiple noise components are:

[0056]

[0057] Where I(t) represents multiple noise components, M is the total number of noise components, and T k It represents the time delay of the noise component corresponding to the kth similar segment relative to the excitation signal.

[0058] S8, obtaining a target signal according to the read signal and the multiple noise components, and acquiring information to be read by the RFID reader according to the target signal.

[0059] The target signal can be obtained by subtracting multiple noise components from the read signal, and the information that the RFID reader wants to read can be obtained by analyzing the target signal.

[0060] According to the RFID reading method of the book editing and acquisition equipment of the embodiment of the present invention, the excitation signal and the read signal are digitized and compared to obtain multiple similar segments in the read digital signal, and then the corresponding multiple noise components are fitted according to the multiple similar segments to finally obtain the target signal, and the RFID tag information is obtained from the target signal. Thus, the noise component generated by the excitation signal in the RFID reader read signal can be effectively estimated, so as to effectively remove these noise components, realize the effective extraction of the target signal, improve the success rate and accuracy of RFID tag information reading, and reduce the false rejection rate of the book editing and acquisition equipment.

[0061] In order to implement the RFID reading method of the book collecting and editing equipment of the above embodiment, the present invention also proposes an RFID reader.

[0062] The RFID reader of the embodiment of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the RFID reading method of the book acquisition and editing device of any of the above embodiments is implemented. The specific implementation method thereof can refer to the embodiment of the RFID reading method of the book acquisition and editing device described above, and will not be described in detail here.

[0063] The RFID reader according to the embodiment of the present invention can effectively estimate the noise components in the read signal caused by the excitation signal, thereby effectively removing these noise components, achieving effective extraction of the target signal, and improving the success rate and accuracy of RFID tag information reading.

[0064] Based on the RFID reader of the above embodiment, the present invention also provides a book collecting and editing device.

[0065] The book collecting and editing device of the embodiment of the present invention includes the RFID reader of the above embodiment.

[0066] According to the book collecting and editing device of the embodiment of the present invention, the false rejection rate is low.

[0067] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0068] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0071] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0072] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0073] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0074] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0075] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0076] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An RFID reading method for book collection and editing equipment, characterized in that: The following steps are involved: S1, when a book with an RFID tag attached reaches the recognition range of an RFID reader, the RFID reader sends an excitation signal to excite the RFID tag to work, wherein the RFID tag is a passive tag; S2, the RFID reader receives a read signal sent by the RFID tag, wherein the read signal includes a target signal and a plurality of noise components, the target signal contains information to be read by the RFID reader, and the noise component is generated by the excitation signal; S3, digitizing the excitation signal to obtain an excitation digital signal, and digitizing the read signal to obtain a read digital signal, wherein the sampling interval for digitizing the read signal and the sampling interval for digitizing the excitation signal are the same, and the number of quantization bits is both 1; S4, intercepting the first N bits of the excitation digital signal as a comparison digital signal, where N is a positive integer; S5, comparing the comparison digital signal with the read digital signal to obtain a plurality of similar segments in the read digital signal; S6, obtaining a time delay of a noise component corresponding to each of the similar segments relative to the excitation signal, and calculating a ratio of an amplitude of the noise component corresponding to each of the similar segments to the excitation signal; S7, fitting the multiple noise components according to the time delay of the noise component corresponding to each of the similar segments relative to the excitation signal, the ratio of the amplitude of the noise component corresponding to each of the similar segments to the excitation signal, and the excitation signal; S8, obtaining the target signal according to the read signal and the multiple noise components, and acquiring information to be read by the RFID reader according to the target signal, In step S3, when the excitation signal or the read signal is digitized, one sampling point corresponds to one bit of the excitation digital signal or the read digital signal, wherein the absolute value of the sampled value is greater than or equal to the quantization threshold and the quantization is 1, and the absolute value of the sampled value is less than the quantization threshold and the quantization is 0. Step S5 specifically includes: S501, initializing i=1; S502, intercepting the i-th bit to the i+N-1-th bit of the read digital signal as a signal segment; S503, calculating the similarity parameter between the compared digital signal and the signal segment, if the similarity parameter is greater than the similarity threshold, the signal segment is recorded as a similar segment; S504, judging whether a preset number of similar segments have been obtained, or i+N-1 is the last bit of the read digital signal, if yes, then ending the current step S5, if not, executing step S505; S505, setting i=i+1, and returning to step S502, The similarity parameter between the comparison digital signal and the signal segment is calculated according to the following formula: ； in, S represents a similarity parameter between the comparison digital signal and the signal segment, α j is the first j Bit, β j is the first j Bit, The sampling time corresponding to the first bit of the similar segment is the time delay, and the ratio of the noise component corresponding to the similar segment to the amplitude of the excitation signal is calculated according to the following formula: ； in, A k Indicates k The ratio of the noise component corresponding to the similar segments to the amplitude of the excitation signal, t k Indicates k The sampling time of similar fragments, ta 1 is the sampling time of the first bit of the similar segment, T This is the first N The sampling time of the bit, V s ( t k ) indicates that the similar segment is at the sampling time t k The sampling value of t 0 represents the sampling moment of the comparison digital signal, tb 1 is the sampling time of the first bit of the comparison digital signal, Tb is the first N The sampling time of the bit, V c ( t 0) indicates that the comparison digital signal is at the sampling time t The sample value of 0, ω is the frequency of the excitation signal, θ is the phase of the excitation signal, The excitation signal is x ( t ), the multiple noise components are: ； in, I ( t ) represents the multiple noise components, M is the total number of noise components, T k Indicates k The noise components corresponding to the similar segments are delayed relative to the time of the excitation signal.

2. An RFID reader, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the RFID reading method of the book acquisition and editing device according to claim 1 is implemented.

3. A book collecting and editing device, characterized in that: Comprising an RFID reader according to claim 2.

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