CN112737640A

CN112737640A - Intelligent book storing and taking device and method

Info

Publication number: CN112737640A
Application number: CN202011567572.XA
Authority: CN
Inventors: 郑裕杰; 邹瀛忠
Original assignee: Guangzhou Andea Electronics Technology Co ltd
Current assignee: Guangzhou Andea Electronics Technology Co ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-04-30
Anticipated expiration: 2040-12-25
Also published as: CN112737640B

Abstract

The invention provides an intelligent book access device and a method, wherein the intelligent book access device comprises a bookshelf and a controller, the bookshelf comprises one or more shelves, and the controller comprises a plurality of frequency modulation antennas, a multiplexer and a read-write module; the frequency modulation antenna is arranged in the one or more shelves, is controlled to switch working frequency points among different frequency points on the same working frequency band, and is used for transmitting read-write signals to the corresponding shelves and receiving corresponding response signals; the multiplexer is used for controlling the read-write signal and the response signal to pass through in a time division duplex mode; the read-write module is used for polling and controlling the multiplexer to pass through the read-write signals of different frequency points in different time slots, synchronously controlling the frequency modulation antenna to be switched to a corresponding frequency point to transmit a corresponding read-write signal, and analyzing the response signal into label data to be output. When the radio frequency tag is biased, the read-write signals of different frequency points are transmitted by polling, so that the problem of frequency bias of the radio frequency tag is solved.

Description

Intelligent book storing and taking device and method

Technical Field

The invention relates to the technical field of radio frequency, in particular to an intelligent book storing and taking device and an intelligent book storing and taking method.

Background

Currently, radio frequency technology is widely applied to book management in libraries. Generally speaking, in order to intelligently manage books and facilitate the searching, positioning and checking of the books, radio frequency tags are pasted in the books, reading and writing signals are radiated to the books with the radio frequency tags on the bookshelf through a reading and writing device on the bookshelf, so that book information data on the bookshelf is obtained through tag data fed back by the radio frequency tags, and each book on each bookshelf of a library is intelligently managed.

In practice, when books are thin and stacked on the same layer of the bookshelf in large quantities, the radio frequency tags in the books are too short in distance, mutual interference is generated among the radio frequency tags, and frequency points of some radio frequency tags can deviate. In the prior art, the intelligent bookshelf only transmits radio frequency signals corresponding to the frequency points of the radio frequency tags which are not subjected to frequency offset, so that the intelligent bookshelf only acquires book information fed back by the radio frequency tags which are not subjected to frequency offset, and the book information corresponding to the radio frequency tags which are subjected to frequency offset cannot be acquired, so that part of books cannot be searched and positioned, and the intelligent management of the books is difficult.

Disclosure of Invention

One of the objectives of the present invention is to provide an intelligent book accessing device capable of adjusting the frequency points of the reading and writing signals.

The invention also aims to provide an intelligent book accessing method.

One of the objectives of the present invention is to provide an intelligent book accessing device, which comprises a bookshelf and a controller, wherein the bookshelf comprises one or more shelves,

the controller comprises a plurality of frequency modulation antennas, a multiplexer and a read-write module;

the frequency modulation antenna is arranged in the one or more shelves, is controlled to switch working frequency points among different frequency points on the same working frequency band, and is used for transmitting read-write signals to the corresponding shelves and receiving corresponding response signals;

the multiplexer is used for controlling the read-write signal and the response signal to pass through in a time division duplex mode;

the read-write module is used for polling and controlling the multiplexer to pass through the read-write signals of different frequency points in different time slots, synchronously controlling the frequency modulation antenna to be switched to a corresponding frequency point to transmit a corresponding read-write signal, and analyzing the response signal into label data to be output.

Furthermore, each shelf is provided with at least one frequency modulation antenna.

Furthermore, each layer or a plurality of layers of frames comprise a plurality of frequency modulation antennas, the frequency modulation antennas are uniformly distributed on the layers of frames, and the frequency modulation antennas of each layer of frame are connected in series with the same power divider to be electrically connected with the multiplexer.

Specifically, all the frequency modulation antennas of each or a plurality of shelves are synchronously controlled by the read-write module and work at the same frequency point in the same time slot.

Preferably, the controller further comprises a control center that compares the received tag data with historical tag data to determine the tag data that has changed therein.

Preferably, the controller is further provided with a human body sensing module, and the human body sensing module is arranged on the bookshelf and used for sensing and acquiring a human body signal to drive the read-write module to work.

Specifically, the shelf is provided with a mounting plate corresponding to the frequency modulation antenna, and the frequency modulation antenna is arranged in the mounting plate.

Further, the frequency modulation antenna comprises:

the antenna oscillator is used for transmitting a read-write signal or receiving a response signal;

a plurality of resonant circuits forming a resonant circuit with the antenna element;

at least one of the resonant circuits is connected in parallel with a switch circuit, and the switch circuit is controlled by the high/low level of the control signal output by the read-write module to correspondingly switch on/off the resonant circuit controlled by the switch circuit so as to switch the working frequency point of the antenna oscillator.

Specifically, the controller further includes signal generators for generating the signals at the different frequency points, and each signal generator generates read-write signals corresponding to the different frequency points in response to the corresponding different voltage signals output by the read-write module.

Furthermore, the controller further comprises a modulator and an amplifying circuit, the modulator is connected in series with one or more signal generators to modulate the read-write signals generated by the generators into radio frequency signals, and the amplifying circuit is connected in series with the modulator to match and amplify the radio frequency signals and output the radio frequency signals to the multiplexer.

Further, the controller further includes at least one receiving circuit, where the receiving circuit is connected in series with the multiplexer and the read-write module, and is used to analyze and output the response signal received by the multiplexer to the read-write module.

Another object of the present invention is to provide an intelligent book accessing method, comprising the steps of:

the drive read-write module transmits read-write signals of different frequency points on the same working frequency band to the frequency modulation antennas in each shelf of the bookshelf in a polling mode in different time slots;

receiving a plurality of response signals responding to the read-write signals through the frequency modulation antenna, and analyzing and acquiring the plurality of response signals by a read-write module to acquire corresponding label data with uniqueness;

comparing the tag data with historical tag data to determine altered tag data therein;

outputting book information corresponding to the changed tag data.

Preferably, the method further comprises the following steps: and detecting a human body activity signal within a preset range of the bookshelf, and executing the subsequent steps after detecting that the human body activity signal exists.

Specifically, in the step of outputting the book information corresponding to the changed tag data, the history tag data is updated with the obtained unique tag data.

Specifically, in the step of polling and sending the read-write signals of different frequency points on the same working frequency band to the frequency modulation antennas in each shelf of the bookshelf by the drive read-write module in different time slots, the read-write module outputs a control signal to synchronously control the on/off of one or more tuning circuits in each frequency modulation antenna so as to adjust the working frequency points of the frequency modulation antennas.

Compared with the prior art, the invention has the following advantages:

the read-write module of the intelligent book access device polls the control multiplexer to pass read-write signals of different frequency points in different time slots, and synchronously controls and sets the working frequency points of the frequency modulation antenna in one or more shelves, so that the frequency modulation antenna can adjust the working frequency points relative to the read-write signals, and further the frequency modulation antenna can poll and transmit the read-write signals of different frequency points, so as to quickly read and write radio frequency tags of different frequency points and prevent the radio frequency tags from being missed to read.

Even if the frequency offset phenomenon of the radio frequency tags occurs due to the fact that the radio frequency tags are stacked mutually, the frequency offset phenomenon is usually a small amount of offset, and when the read-write module reads and writes the radio frequency tags at another adjacent frequency point, the radio frequency tags with the offset frequency can still be effectively read. For products with high accuracy requirements, such as the intelligent book storing and taking device, by applying the technical scheme of the invention, the reliability of the intelligent book storing and taking device can be improved by ensuring the effective identification of various radio frequency tags, so that the accurate searching and positioning of books and the accurate statistics of the number of books are ensured.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of the deployment architecture of the intelligent book accessing device of the present invention.

FIG. 2 is a schematic block circuit diagram of an embodiment of the intelligent book accessing device of the present invention.

Fig. 3 is a schematic circuit diagram of a frequency modulation antenna employed by the intelligent book storing and taking device of the present invention.

FIG. 4 is a flow chart of the intelligent book accessing method of the present invention.

FIG. 5 is a schematic block circuit diagram of the controller system of the intelligent library of the present invention.

Detailed Description

Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for a more thorough and complete understanding of the present invention. It should be understood that the drawings and the embodiments of the present invention are illustrative only and are not intended to limit the scope of the present invention.

It should be understood that the various steps recited in the method embodiments of the present invention may be performed in a different order and/or performed in parallel. Moreover, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the invention is not limited in this respect.

The term "include" and variations thereof as used herein are open-ended, i.e., "including but not limited to". The term "coupled" may refer to direct coupling or indirect coupling via intermediate members (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions for other terms will be given in the following description.

It should be noted that the terms "first", "second", and the like in the present invention are only used for distinguishing the devices, modules or units, and are not used for limiting the devices, modules or units to be different devices, modules or units, and are not used for limiting the sequence or interdependence relationship of the functions executed by the devices, modules or units.

The intelligent book storing and taking device provided by the invention is used for reading the radio frequency tags with different frequency points by adjusting the working frequency of the transmitted read-write signal. Considering that the range of the offset frequency generated by the radio frequency tag is generally limited, the operating frequency is generally controlled to be in a narrow operating frequency band, for example, the operating frequency band occupies a bandwidth of 1-10MHz, even only occupies a bandwidth of 1-2MHz, correspondingly, when the read-write signal is transmitted, different frequency points in the operating frequency band can be transmitted, and the intervals of the different frequency points can be adjusted by taking, for example, 1MHz or 2MHz as the width, so as to implement a plurality of polling-switched operating frequency points in the operating frequency band range.

Referring to FIG. 1, in an exemplary embodiment of the present invention, the intelligent book access device 10 includes a bookshelf 11 and a controller 20. The bookshelf 11 comprises one or more shelf layers 12, and the shelf layers 12 are used for placing books.

Referring to fig. 2, the controller 20 includes at least one fm antenna 25, a multiplexer 24, at least one signal generator 22, a modulator 23, an amplifying circuit 28, a receiving circuit 26, and a read/write module 21. The circuit principle of the controller 20 is as follows: the read-write module 21 drives the signal generator 22 to generate a read-write signal, the signal generator 22 outputs the read-write signal to the modulator 23, the modulator 23 modulates the read-write signal into a radio frequency signal, the modulator 23 outputs the read-write signal after modulation to the amplifying circuit 28, the amplifying circuit 28 amplifies the read-write signal in a matching manner, the amplifying circuit 28 outputs the read-write signal after amplification in a matching manner to the multiplexer 24, the multiplexer 24 outputs the read-write signal to the frequency modulation antenna 25 in a time slot, and the read-write module 21 controls a working frequency point of the frequency modulation antenna 25 to be consistent with a frequency point of the read-write signal, so that the read-write signal is radiated to a free space through the frequency modulation antenna 25.

When the radio frequency tag located in the free space receives the read-write signal, the radio frequency tag generates a response signal after being excited, the frequency modulation antenna 25 receives the response signal and outputs the response signal to the receiving circuit 26 through the multiplexer 24, and the receiving circuit 26 demodulates the response signal and outputs the demodulated response signal to the read-write module 21.

When there are multiple fm antennas 25, the multiple fm antennas 25 are connected in series to the same power divider 27, and the power divider 27 is electrically connected to the multiplexer 24. The multiplexer 24 outputs the read/write signals to the power divider 27, and the power divider 27 divides the read/write signals into a corresponding number of multi-path signals corresponding to the number of the frequency modulation antennas and outputs the multi-path signals to the corresponding frequency modulation antennas 25. The above is the basic circuit principle of the present invention, and the details are described below.

The read-write module 21 is configured to poll the driving signal generator 22 to generate different read-write signals, and the read-write module 21 is further configured to receive the response signal to obtain the tag data in the response signal, so as to obtain the book information in the tag data. The read-write module 21 synchronously controls the signal generator 22, the amplifying circuit 28, the multiplexer 24 and the frequency modulation antenna 25, so that the signal generator 22 can generate read-write signals with the same working frequency point as the frequency modulation antenna 25 in one time slot.

The signal generator 22 can generate read and write signals with different frequency points. It can be implemented by a voltage-controlled oscillating circuit, and the read/write module 21 outputs different voltage signals to it to generate the read/write signals of different frequency points correspondingly.

When there are multiple signal generators 22, the multiple signal generators 22 are respectively used to generate read-write signals at different frequency points, so as to correspondingly read and write radio frequency tags at different frequency points. The read-write module 21 outputs a voltage signal to one of the signal generators 22 of the plurality of signal generators 22 each time, drives the signal generator 22 to generate a corresponding read-write signal, and the plurality of signal generators 22 are respectively used for generating read-write signals of different frequency points. Generally, the read/write signals generated by the signal generator 22 are baseband signals.

The plurality of signal generators 22 are respectively a first signal generator 221, a second signal generator 222, and a third signal generator 223, and the read/write module 21 respectively drives different signal generators 22 to generate read/write signals of different frequency points in different time slots, for example, in a first time slot, the read/write module 21 drives the first signal generator 221 to generate a first read/write signal; in the second time slot, the read-write module 21 drives the second signal generator 222 to generate a second read-write signal; in the third time slot, the read-write module 21 drives the third signal generator 223 to generate a third read-write signal; the frequency points of the first read-write signal, the second read-write signal and the third read-write signal are different.

The modulator 23 receives the read/write signal output by the signal generator 22, and modulates the read/write signal from a baseband signal to a radio frequency signal. The modulator 23 is connected in series with the plurality of signal generators 22, so that the read-write signal output by each signal generator 22 is modulated from a baseband signal to a radio frequency signal by the modulator 23. The modulator 23 sequentially receives the read/write signals output from the plurality of signal generators 22 at different time slots, and further sequentially modulates the received read/write signals.

The amplifying circuit 28 receives the read-write signal output by the modulator 23, and the amplifying circuit 28 performs matching amplification on the read-write signal to control the gain of the read-write signal. Specifically, the read/write module 21 may control the amplification performance of the amplification circuit 28 on the read/write signal, so that the amplification performance of the amplification circuit 28 matches the amplification performance preset by the read/write module 21, and the read/write signal is amplified.

The multiplexer 24 receives the read/write signal output from the amplifying circuit 28 and outputs the read/write signal to the frequency modulation antenna 25. The multiplexer 24 polls to receive or output the read-write signals and the response signals of different frequency points in different time slots in a time division duplex mode. The multiplexer 24 receives only the read-write signal and/or the corresponding response signal of one frequency point in one time slot, so that the frequency modulation antenna 25 can poll to transmit the read-write signal and/or receive the corresponding response signal of different frequency points. Specifically, the multiplexer 24 divides the fixed time into a plurality of time slots, which are a first time slot, a second time slot and a third time slot, respectively, and sets the read-write signals with different frequency points as a first read-write signal, a second read-write signal and a third read-write signal, respectively.

In the first time slot, the multiplexer 24 receives the first read-write signal and outputs the first read-write signal to the frequency modulation antenna 25; in a second time slot, the multiplexer 24 receives the second read-write signal and outputs the second read-write signal to the fm antenna 25; in a third time slot, multiplexer 24 receives the third read-write signal and outputs the third read-write signal to fm antenna 25.

In another embodiment, in the first time slot, the multiplexer 24 further receives a first response signal fed back by the radio frequency tag in response to the first read-write signal; in the second time slot, the multiplexer 24 also receives a second response signal fed back by the radio frequency tag in response to the second read-write signal; in the third time slot, the multiplexer 24 also receives a third acknowledgement signal fed back by the radio frequency tag in response to the third read-write signal.

In another embodiment, in the first time slot, the multiplexer 24 receives the first read-write signal and outputs the first read-write signal to the fm antenna 25; in the second time slot, the multiplexer 24 also receives a first response signal fed back by the radio frequency tag in response to the first read-write signal; in the third time slot, the multiplexer 24 receives the second read-write signal and outputs the second read-write signal to the fm antenna 25. Therefore, if the offset frequency of the former answer signal is larger, the latter time slot can also effectively receive the answer signal for subsequent processing.

In the exemplary embodiment of the present invention, the multiplexer 24 is controlled by the read/write module 21, the read/write module 21 controls the multiplexer 24 to receive the read/write signals of different frequency points in different time slots, and the synchronous control signal generator 22, the amplifying circuit 28 and the frequency modulation antenna 25 work as the read/write signals of the same frequency point, so that the electrical components can cooperate with each other, and the frequency point of the read/write signal generated by the control signal generator 22 in the same time slot is the same as the working frequency point of the frequency modulation antenna 25.

The frequency modulation antenna 25 is configured to receive the read-write signal output by the multiplexer 24, radiate the received read-write signal to a free space, and receive a response signal fed back by the radio frequency tag corresponding to the read-write signal.

Because the read-write module 21 controls the signal generator 22 to generate read-write signals with different frequency points in different time slots, the frequency modulation antenna 25 transmits the read-write signals with different frequency points, and the frequency modulation antenna 25 needs to adjust the working frequency point. The read-write module 21 outputs a control signal to the frequency modulation antenna 25 to switch the working frequency points of the frequency modulation antenna 25 between different frequency points on the same working frequency band, that is, the read-write module 21 controls the frequency modulation antenna 25 to transmit read-write signals of different frequency points, so as to read tag information of the radio frequency tags in the book shelves 11 or the books on each shelf layer 12 of the intelligent access device 10. After receiving the read-write signal, the radio frequency tag is excited to feed back a response signal to the frequency modulation antenna 25.

In particular, referring to fig. 3, the frequency-modulated antenna 25 comprises an antenna element 253, a plurality of resonant circuits 252 and at least one switching circuit 251. The plurality of resonant circuits 252 are connected in series to form a resonant circuit, and a switch circuit 251 is connected in parallel to at least one resonant circuit 252 in the resonant circuit, so that the power and the resistance of the resonant circuit can be adjusted by controlling the on/off of the switch circuit 251. The antenna element 253 is also connected in series in the resonant circuit, and the working frequency point of the antenna element 253 is changed under the influence of the power and the resistance value of the resonant circuit, that is, the working frequency point of the antenna element 253 can be changed by controlling the on/off of the switch circuit 251, so that the frequency modulation antenna 25 can transmit read-write signals of different frequency points.

The read/write module 21 is electrically connected to the switch circuit 251, and the read/write module 21 outputs a control signal to the switch circuit 251 to control the on/off of the switch circuit 251 through the control signal. In some embodiments, the read/write module 21 controls the on/off of the switch circuit 251 by controlling the high/low level of the output control signal.

It can be understood that, by configuring corresponding switch circuits controlled by the read/write module 21 for the plurality of resonant circuits 252, the read/write module 21 can selectively control the on/off of one or more resonant circuits 252 to control the antenna element 253 to operate at different frequency points. Therefore, in some embodiments, the resonant circuit includes a plurality of resonant circuits 252, each resonant circuit 252 is connected in parallel with a switch circuit 251, and the read/write module 21 can change the working frequency of the antenna element 253 by controlling on/off of the plurality of switch circuits 251 connected in parallel to the resonant circuit 252, so that the frequency modulation antenna 25 has a plurality of working frequency points. The read-write module 21 synchronously controls the signal generator 22, the amplifying circuit 28, the multiplexer 24 and the frequency modulation antenna 25, so that the read-write signal frequency point is the same as the working frequency point of the frequency modulation antenna 25 in the same time slot.

Further disclosing the circuit structure of the frequency modulation antenna, as shown in fig. 3, the resonant circuit 252 is composed of a capacitor and a resistor connected in parallel, and the resistance values of the resistors of the plurality of resonant circuits 252 constituting the resonant circuit are equal to or unequal to the capacitance values of the capacitors. The antenna element 253 is a coil. The switch circuit 251 and the resonance circuit 252 have capacitors and resistors connected in parallel, and the read/write module 21 controls the on/off of the switch circuit 251 through a high/low level for outputting a control signal to the switch circuit 251.

When the switch circuit 251 is turned on, the switch circuit 251 is equivalent to a short circuit, and the resistance and the capacitance of the resonant circuit 252 connected in parallel with the switch circuit 251 do not pass current, so that the capacitance of the resonant circuit is increased, and the working frequency of the antenna oscillator 253 is reduced; when the switch circuit 251 is turned off, the resistor and the capacitor of the resonant circuit 252 connected in parallel to the switch circuit 251 are turned on, so that the capacitance of the resonant circuit is reduced, and the operating frequency of the antenna element 253 is increased. Therefore, the capacitance value in the resonant circuit is changed, and the power of the resonant circuit is further influenced, so that the working frequency point of the antenna element 253 of the coil structure is changed, and the frequency modulation antenna 25 works at different frequency points in different time slots. In general, the frequency-modulated antenna 25 of the present invention operates at a frequency between 0 and 30MHz, preferably between 9.6MHz and 13.56 MHz.

The fm antenna 25 receives a response signal fed back by the rf tag in response to the read/write signal, the response signal is output to the multiplexer 24, and after receiving the response signal, the multiplexer 24 outputs the response signal to the read/write module 21 through the receiving circuit 26.

The receiving circuit 26 is disposed between the multiplexer 24 and the read/write module 21, and the receiving circuit 26 demodulates the received response signal, so that the read/write module 21 can obtain the tag data through the demodulated read/write signal. The controller 20 comprises at least one receiving circuit 26 for demodulating the read and write signals.

In some embodiments of the present invention, the controller 20 includes a plurality of receiving circuits 26, each receiving circuit 26 corresponds to a response signal at a different frequency point, and the plurality of receiving circuits 26 correspondingly demodulate the response signals at the corresponding frequency point. By the mode, each receiving circuit 26 corresponds to the response signals of different frequency points, the receiving circuits 26 can enable the response signals to be demodulated accurately, errors are reduced, and tag data cannot be lost. Alternatively, the plurality of receiving circuits 26 may demodulate each response signal at the same time, thereby avoiding a failure of a certain receiving circuit 26 and enhancing the success rate of demodulation.

For example, the plurality of receiving circuits 26 are respectively a first receiving circuit 261, a second receiving circuit 262, and a third receiving circuit 263. In the first time slot, the first receiving circuit 261 receives the first response signal output by the multiplexer 24, demodulates the first response signal, and outputs the demodulated first response signal to the read/write module 21; in the second time slot, the second receiving circuit 262 receives the second response signal output by the multiplexer 24, demodulates the second response signal, and outputs the demodulated second response signal to the read/write module 21; in the third time slot, the third receiving circuit 263 receives the third response signal output by the multiplexer 24, demodulates the third response signal, and outputs the demodulated first read response signal to the read/write module 21; the frequency points of the first response signal, the second response signal and the third response signal are different.

In the exemplary embodiment of the present invention, a plurality of or all of the fm antennas 25 are connected in series to the same power divider 27, and the power divider 27 is electrically connected to the same multiplexer 24. When the multiplexer 24 receives the read-write signal of the same frequency point in one time slot, the read-write signal is output to the power divider 27, the power divider 27 divides the received read-write signal into a plurality of signals of a corresponding number corresponding to the number of the frequency modulation antennas 25 electrically connected thereto, and outputs the signals to the corresponding frequency modulation antennas 25, so that the load of the multiplexer 24 can be reduced, the gain of each frequency modulation antenna 25 can be reduced, and the excessive gain and the excessive signal radiation of the frequency modulation antennas 25 can be avoided.

The bookshelf 11 comprises one or more shelf layers 12, and at least one frequency modulation antenna 25 is arranged on the shelf layers 12. The frequency modulation antenna 25 transmits read-write signals towards the length direction of the shelf layer 12 or the arrangement or stacking direction of the books so as to transmit read-write signals to the books with the radio frequency tags on the shelf layer 12 where the frequency modulation antenna 25 is located, so as to obtain tag data of the radio frequency tags on the books on the shelf layer 12.

When the shelf 12 has a plurality of fm antennas 25, the plurality of fm antennas 25 are uniformly distributed on the shelf 12. Specifically, the plurality of fm antennas 25 may be arranged in the following manner: at least two ends of the frame layer 12 are respectively provided with a frequency modulation antenna 25, and the radiation directions of the frequency modulation antennas 25 at the two ends are opposite. When the fm antenna 25 is redundant, it is preferable to dispose the fm antenna 25 in the middle of the shelf 12 or dispose the fm antennas 25 at regular intervals in the longitudinal direction of the shelf 12, so that the fm antennas 25 can uniformly transmit read and write signals to the entire shelf 12.

The multiple frequency modulation antennas 25 on the same shelf layer 12 are electrically connected to the same multiplexer 24, and the read-write module 21 outputs read-write signals of the same frequency point to the multiple frequency modulation antennas 25 on each shelf layer 12 through the multiplexer 24, so that the multiple frequency modulation antennas 25 on multiple or all shelf layers 12 of the bookshelf 11 externally radiate the read-write signals of the same frequency point in the same time slot.

The multiple fm antennas 25 of each shelf 12 are electrically connected to the same multiplexer 24, and the multiplexer 24 outputs read/write signals of different frequency points to the multiple fm antennas 25 of each shelf 12 in different time slots in a time division duplex manner. The plurality of frequency modulation antennas 25 of each shelf layer 12 radiate the read-write signal of the same frequency point to the outside in the same time slot, so as to radiate the read-write signal to the radio frequency tag of the corresponding frequency point; in another time slot, the multiple fm antennas 25 on each shelf 12 simultaneously radiate the read/write signal of another frequency point to the outside, so as to radiate the another read/write signal to the rf tag corresponding to the another frequency point.

For example, in a first time slot, the multiple fm antennas 25 on each shelf 12 are controlled to simultaneously radiate a first read/write signal; in a second time slot, controlling a plurality of frequency modulation antennas 25 on each shelf layer 12 to simultaneously radiate a second read-write signal; in the third time slot, the multiple fm antennas 25 on each frame layer 12 are controlled to simultaneously radiate a third read-write signal, and the frequency points of the first read-write signal, the second read-write signal, and the third read-write signal are different.

In the exemplary embodiment of the present invention, a power divider 27 is further disposed between the plurality of fm antennas 25 on each shelf 12 and the multiplexer 24, so as to divide the read/write signals input by the multiplexer 24 into multiple channels from the plurality of fm antennas 25 on the same shelf 12, and output the multiple channels to the plurality of fm antennas 25 on the same shelf 12, so as to reduce the load on the multiplexer 24. Specifically, the plurality of fm antennas 25 on the same shelf 12 are all connected in series to the same power divider 27, and the plurality of power dividers 27 correspondingly connected in series to the plurality of shelves 12 are electrically connected to the same multiplexer 24. The read-write module 21 outputs the read-write signals of the same frequency point to the power dividers 27 through the multiplexer 24, and the power dividers 27 divides the input read-write signals into multiple read-write signals of the same frequency point and correspondingly outputs the multiple read-write signals to the multiple frequency modulation antennas 25 of the same shelf layer 12, so that the multiple frequency modulation antennas 25 on the multiple or all shelf layers 12 of the bookshelf 11 externally radiate the read-write signals of the same frequency point in the same time slot.

The intelligent book storing and taking device 10 further comprises a human body sensing module, the human body sensing module is arranged on the bookshelf 11 and used for sensing whether a person is close to the bookshelf 11 or not, when the human body sensing module detects that the person is close to the bookshelf 11, the human body sensing module senses and acquires human body activity signals, and the human body sensing module outputs the human body activity signals to the reading and writing module 21 so as to drive the reading and writing module 21 to work.

The intelligent access device also comprises a control center 30, and the control center 30 controls the read-write module 21 to work; the read-write module 21 synchronously controls the signal generator 22, the amplifying circuit 28, the multiplexer 24 and the frequency modulation antennas 25 to work according to a predetermined polling mode, so that the plurality of frequency modulation antennas 25 on each shelf layer 12 externally radiate read-write signals of the same frequency point in the same time slot, and externally radiate read-write signals of another frequency point in another time slot. The control center 30 is electrically connected or wirelessly connected with the read/write module 21.

The control center 30 is configured to control the read/write module 21 to work, and acquire and process the tag data acquired by the read/write module 21 after receiving the response signal. The tag data includes book information of the book where the tag data is located, for example, information such as the name, version number, date of storage, classification, price, and number inside the library of the book.

The control center 30 is further provided with a database, which prestores all the book information of the bookshelf 11 or the whole library or can call all the book information of the whole library from the external device 40. The control center 30 is connected to the external device 40 through a wired or wireless communication, and the control center 30 uploads the tag data acquired through the intelligent book accessing apparatus 10 to the external device 40 or receives control data issued by the external device 40 or calls book information stored in the external device 40.

After receiving the tag data, the control center 30 identifies the book information in the tag data, searches the current state of the book pointed by the book information from the database through the book information, and updates the book information.

For example, when the number of all books placed on the intelligent book storing and taking device 10 needs to be checked, the reading and writing device synchronously controls the signal generator 22, the amplifying circuit 28, the multiplexer 24, the frequency modulation antenna 25 and other electronic devices, so that the frequency modulation antenna 25 on each shelf layer 12 transmits reading and writing signals with different frequency points to the space of the shelf layer 12 in different time slots, and transmits the reading and writing signals to a plurality of radio frequency tags with different frequency points arranged on the books in different time slots, wherein the radio frequency tags with different frequency points include radio frequency tags with frequency offset due to aggregation of a plurality of radio frequency tags. In different time slots, the radio frequency tags at different frequency points are stimulated by the read-write signals at corresponding frequency points to feed back response signals to the frequency modulation antenna 25, the frequency modulation antenna 25 outputs the response signals to the read-write module 21, and the read-write module 21 analyzes tag data in the response signals acquired by the response signals and outputs the tag data to the control center 30.

The control center 30 determines the tag data changed in the bookshelf 11 of the intelligent access device or each shelf 12 of the intelligent access device, that is, determines the change of books in the bookshelf 11 or each shelf 12, according to the comparison of the acquired tag data with the history tags stored in the database thereof.

Specifically, the control center 30 compares the currently acquired tag data with the historical tag data to determine whether the total amount of tag data is decreased or increased, thereby determining an increase or decrease in the number of books on the bookshelf 11 or each shelf layer 12. The control center 30 may further determine what kind of books are placed on the bookshelf 11 or each shelf layer 12 according to the book information in the obtained tag data, so as to inquire which layer of which bookshelf 11 the corresponding book is placed on through the database.

Still be equipped with the mounting panel on the shelf layer 12, the mounting panel is used for the holding frequency modulation antenna 25, protects frequency modulation antenna 25 not to receive the damage. And, when the mounting plates are not provided at both ends of the shelf layer 12, the mounting plates may also be used to partition the shelf layer 12, dividing the shelf layer 12 into a plurality of small book areas, preventing books of different types or numbers.

The invention also provides an intelligent library which comprises a plurality of groups of intelligent book storing and taking devices 10. The multiple groups of intelligent book accessing devices 10 share the control center 30 or the external device 40, so that the multiple groups of intelligent book accessing devices call or store book information in the database of the control center 30 or the external device 40.

The intelligent library comprises a plurality of groups of intelligent book access devices 10, wherein a plurality of controllers 20 of the plurality of groups of intelligent book access devices 10 are mutually matched to form a controller system, and the plurality of groups of intelligent book access devices are controlled through the controller system.

Referring to fig. 5, the controller system of the intelligent library shares the read-write module 21, the signal generator 22, the control center 30, the modulator 23 and the amplifying circuit 28. The plurality of controllers 20 of the controller system each correspond to one multiplexer 24, that is, the controller system includes a plurality of multiplexers 24, the read/write module 21 is electrically connected to the plurality of multiplexers 24 to control the operation of the plurality of multiplexers 24, and the plurality of multiplexers 24 are respectively connected in series to at least one frequency modulation antenna 25.

In the controller system of the present invention, the read-write module 21 can control a plurality of or all multiplexers 24 to pass through the read-write signals of the same frequency point in the same time slot, so as to output corresponding read-write signals to the frequency modulation antennas 25 corresponding to the plurality of or all multiplexers 24.

The circuit setting mode of the multiplexers is as follows: one of the multiplexers is used as a main multiplexer, the main multiplexer is connected with the signal generating device in series, the other multiplexers (auxiliary multiplexers) are respectively connected with the main multiplexer in series, the main multiplexer respectively outputs read-write signals received from the signal generating device to the auxiliary multiplexers and the corresponding frequency modulation antennas 25, and the auxiliary multiplexers output the received read-write signals to the corresponding frequency modulation antennas 25. And after receiving the response signal, the fm antennas 25 corresponding to all multiplexers output the response signal to the corresponding multiplexer, and after receiving the response signal, the sub-multiplexer outputs the response signal to the main multiplexer, and outputs the response signal to the receiving circuit 26 through the main multiplexer, except for the main multiplexer.

In some embodiments, a multiplexer control unit 27 is disposed between the sub-multiplexer and the read/write module 21 to cooperate with the read/write module 21 to control the operation of the corresponding multiplexer 24.

In an exemplary embodiment of the present invention, the plurality of multiplexers are a first multiplexer 241, a second multiplexer 242, and a third multiplexer 243. The first multiplexer 241 is connected in series with the signal generating device, the second multiplexer 242 and the third multiplexer 243 are not connected in series with the signal generating device, the three multiplexers are all electrically connected with the read/write module 21, the read/write module 21 controls the three multiplexers to work, the three multiplexers are respectively connected in series with at least one frequency modulation antenna 25, and the first multiplexer 241 is also respectively connected in series with the second multiplexer 242 and the third multiplexer 243.

In a time slot, the signal generating device outputs a read-write signal to the first multiplexer 241, the first multiplexer 241 is controlled by the read-write module 21 to output the read-write signal to the second multiplexer 242 and the third multiplexer 243 respectively, and the read-write module 21 controls all the three multiplexers to pass the read-write signal, so that all the three multiplexers output the read-write signal to the corresponding fm antenna 25.

In another time slot, the signal generating device outputs a read-write signal to the first multiplexer 241, the first multiplexer 241 is controlled by the read-write module 21 to output the read-write signal to the second multiplexer 242 and the third multiplexer 243, respectively, but the read-write module 21 only controls the first multiplexer 241 and the third multiplexer 243 to pass the read-write signal, and the second multiplexer 242 does not pass the read-write signal, so that the first multiplexer 241 and the third multiplexer 243 output the read-write signal to the corresponding fm antenna 25 after receiving the read-write signal.

In one embodiment, the first multiplexer 241 outputs read/write signals to only two electrical elements simultaneously in one time slot. For example, the first multiplexer 241 outputs read/write signals only to the corresponding fm antenna 25 and the second multiplexer 242, or the first multiplexer 241 outputs read/write signals only to the second multiplexer 242 and the third multiplexer 243.

The controller system of the invention can control whether the corresponding frequency modulation antenna 25 transmits the read-write signal or not by controlling whether the read-write signal passes through the plurality of multiplexers or not. The above embodiments are only some of the embodiments of the multiplexers of the controller system of the present invention, and those skilled in the art can flexibly and flexibly use the above embodiments based on the above embodiments, which is not exhaustive.

Therefore, it can be seen that the multiplexers 24 corresponding to the multiple groups of intelligent book access devices 10 of the intelligent library are arranged in a cascade manner to form a controller system, and the controller of the multiple groups of intelligent book access devices 10 is synchronously controlled by the controller system, so that the control level is reduced, the control efficiency is improved, and the circuit layout is reduced.

The intelligent library can synchronously control a plurality of frequency modulation antennas 25 on a plurality of groups of intelligent book access devices 10 to externally radiate read-write signals of the same frequency point in the same time slot; in another time slot, the multiple frequency modulation antennas 25 on the multiple groups of intelligent book access devices 10 are synchronously controlled to radiate another read-write signal to the outside, so as to realize polling of the read-write signals radiating different frequency points to the outside and receiving corresponding response signals.

The invention also provides an intelligent book storing and taking method, which is implemented based on the intelligent book storing and taking device, and referring to fig. 4, the intelligent book storing and taking method comprises the following steps:

s10, the read-write module is driven to poll and send read-write signals of different frequency points on the same working frequency band to the frequency modulation antennas in each shelf of the bookshelf in different time slots:

in the same time slot, the read-write module controls the signal generator to generate read-write signals, the signal generator outputs the read-write signals to the modulator, the modulator modulates the read-write signals from baseband signals into radio-frequency signals, the modulator outputs the modulated read-write signals to the amplifying circuit, the read-write signals are subjected to matched amplification through the amplifying circuit, the amplifying circuit outputs the read-write signals to the multiplexer, the multiplexer outputs the read-write signals to a plurality of or all frequency modulation antennas of a plurality of shelves of the bookshelf, and the read-write signals are radiated outwards through the frequency modulation antennas. In the circuit flow, the read-write module synchronously controls the signal generator, the amplifying circuit, the multiplexer and the frequency modulation antenna, so that the electrical components work on the same frequency point.

In another time slot, the above steps are repeated, but the frequency point of each read-write signal and the working frequency point of each electrical element are different from the frequency point of the last time slot. Therefore, the read-write module is driven to poll a plurality of shelves of the bookshelf or all frequency modulation antennas in different time slots to generate read-write signals of different frequency points on the same working frequency band. And sequentially generating read-write signals of corresponding frequency points to the radio frequency tags of different frequency points.

Based on the description above, in each time slot, in order to control the frequency modulation antenna to work at different frequency points to transmit read-write signals of different frequency points, the switching circuit is arranged on the frequency modulation antenna, and the on/off of the switching circuit is controlled, so as to control the working frequency points of the frequency modulation antenna. The specific circuit structure can be found in the above description of the intelligent book accessing device.

S20, receiving multiple response signals responding to the read/write signals through the frequency modulation antenna, and analyzing and acquiring the multiple response signals by the read/write module to obtain corresponding unique tag data:

and after the radio frequency tag receives the read-write signal output by the frequency modulation antenna, the radio frequency tag is excited to feed back a response signal to the frequency modulation antenna. After the frequency modulation antenna receives the response signal, the frequency modulation antenna outputs the response signal to the read-write module through the multiplexer and the receiving circuit, and the receiving circuit demodulates the response signal so that the read-write module can obtain unique tag data in the response signal.

S30, comparing the label data with historical label data to determine changed label data;

and after the read-write module acquires the tag data, the tag data is output to the control center, and the control center compares the acquired tag data with historical tag data stored in a database of the control center to determine the changed tag data in the bookshelf or each shelf layer of the intelligent book access device.

And S40, outputting book information corresponding to the changed label data.

And the control center acquires the changed label data, acquires corresponding book information from the changed label data, determines the placement position of the corresponding book in the bookshelf or each shelf layer of the intelligent book access device according to the book information, and updates the historical label data of the control center.

The intelligent book access method further comprises the following steps: and detecting a human body activity signal within a preset range of the bookshelf, driving the read-write module to work after detecting that the human body activity signal exists, and executing the step S10.

In summary, the plurality of fm antennas on the same shelf of the intelligent book storage device of the present invention simultaneously radiate the read/write signal at the same frequency point in the same time slot, and simultaneously radiate the read/write signal at another frequency point in another time slot. When the radio frequency tag is biased, the intelligent book access device can transmit read-write signals with different frequency points through polling, so that the problem of frequency bias of the radio frequency tag is solved.

The foregoing description is only exemplary of the preferred embodiments of the invention and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention according to the present invention is not limited to the specific combination of the above-mentioned features, but also encompasses other embodiments in which any combination of the above-mentioned features or their equivalents is possible without departing from the scope of the invention as defined by the appended claims. For example, the above features and (but not limited to) features having similar functions of the present invention are mutually replaced to form the technical solution.

Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

Claims

1. The utility model provides an intelligence books access arrangement, includes bookshelf and controller, the bookshelf includes one or more layer frame, its characterized in that:

2. The intelligent book access device of claim 1, wherein each shelf is provided with at least one of said frequency modulated antennas.

3. The intelligent book accessing device of claim 1, wherein each shelf or multiple shelves comprises multiple said fm antennas, the multiple fm antennas are uniformly distributed on the shelves, and the multiple fm antennas of each shelf are serially connected to a same power divider to electrically connect the multiplexers.

4. The intelligent book access device of claim 3, wherein all FM antennas of each or more shelves are controlled synchronously by the read/write module and operate at the same frequency point in the same time slot.

5. The intelligent book access device of claim 1, wherein the controller further comprises a control center that compares the received tag data with historical tag data to determine changed tag data therein.

6. The intelligent book accessing device according to claim 1, wherein the controller further comprises a human body sensing module, and the human body sensing module is disposed on the bookshelf and used for sensing and acquiring a human body signal to drive the read/write module to operate.

7. An intelligent book access arrangement as claimed in claim 2 or 3, wherein the shelves are provided with mounting plates corresponding to the frequency modulated antennas, the frequency modulated antennas being provided within the mounting plates.

8. The intelligent book access device of claim 1, wherein the frequency modulated antenna comprises:

9. The intelligent book access device of claim 1, wherein the controller further comprises signal generators for generating the signals at the different frequency points, respectively, each signal generator generating a read-write signal corresponding to a different frequency point in response to a corresponding different voltage signal output by the read-write module.

10. The intelligent book access device of claim 9, wherein the controller further comprises a modulator and an amplifier circuit, the modulator is connected in series with one or more signal generators to modulate the read and write signals generated by the generators into radio frequency signals, and the amplifier circuit is connected in series with the modulator to match and amplify the radio frequency signals for output to the multiplexer.

11. The intelligent book access device of claim 1, wherein the controller further comprises at least one receiving circuit, the receiving circuit is connected in series with the multiplexer and the read-write module for parsing and outputting the response signal received by the multiplexer to the read-write module.

12. An intelligent book access method is characterized by comprising the following steps:

outputting book information corresponding to the changed tag data.

13. The intelligent book accessing method of claim 12, further comprising the pre-step of: and detecting a human body activity signal within a preset range of the bookshelf, and executing the subsequent steps after detecting that the human body activity signal exists.

14. The intelligent book access method of claim 12, wherein in the step of outputting book information corresponding to the changed tag data, the history tag data is updated with the obtained tag data having uniqueness.

15. The intelligent book accessing method of claim 12, wherein in the step of sending the read-write signals of different frequency points on the same operating frequency band to the fm antennas in each shelf of the bookshelf by polling in different time slots by the driving read-write module, the read-write module outputs a control signal to synchronously control the on/off of one or more tuning circuits in each fm antenna so as to adjust the operating frequency points of the fm antennas.