An automatic cruising inventory counting device for libraries based on RFID

Abstract

The invention relates to the technical field of book inventory counting devices, and in particular to an automatic cruise inventory counting device for a library based on RFID; the device comprises a translation module fixed on the top of a bookcase and a turning module fixed on the translation module, wherein a detection inventory counting module located beside the bookcase is installed at the bottom of the turning module; the device performs translation and 360-degree rotation according to a profile track, and performs a comprehensive inventory counting on the books on the bookcase, thereby effectively avoiding the error of manual inventory counting and improving the inventory counting efficiency; the invention adopts a transmission design of a single-row gear rack meshing for translation, and adopts a belt transmission design for rotation; both translation and rotation are provided with double insurance of servo motor circle counting and sensor counting, thereby ensuring the accuracy of inventory counting; the invention performs label identification and inventory counting on books in a library based on RFID technology, but reduces the cost of related RFID inventory counting equipment to about one thousand yuan, and has broad market prospects.

Description

Technical Field

[0001] The invention relates to the technical field of book inventory counting devices, and in particular to an automatic cruise inventory counting device for a library based on RFID. Background Art

[0002] RFID (Radio Frequency Identification), also known as wireless radio frequency identification, is a communication technology, commonly known as electronic tags, which can identify specific targets and read and write related data through radio signals without the need to establish mechanical or optical contact between the identification system and the specific target. RFID inventory machines usually consist of three parts: tags, readers, and antennas. Tags are attached to items and store relevant information about the items; readers and antennas are responsible for identifying and transmitting radio frequency signals to related control modules. When an item passes through the inventory machine, the reader sends a radio frequency signal through the antenna to activate the tag and read the product information in the tag, thereby achieving rapid inventory and data collection.

[0003] At present, the number, category, location information and other data of books on library bookshelves need to be counted every week or even every day to ensure the corresponding order. Manual inventory is not only time-consuming and laborious, but also often results in inventory errors due to the large number of books. With the development of automation technology, two mainstream automatic inventory machines have appeared on the market, which can collect data from the labels affixed to books on library bookcases: one is an inventory device fixed on the ceiling rail, and the second is an inventory robot that can automatically travel on the ground. The former must change the position of the rail when the library's bookcase is moved, and the ceiling also needs to be redecorated. At the same time, it also occupies more vertical space. When moving along the rail, it is inevitable that it will affect the readers who are walking. The latter can currently only perform fixed-point inventory based on simple obstacle avoidance measures, and for the tall bookcases and shelves in the library, the overall manufacturing volume of the inventory robot will also increase. In addition, a single mobile inventory robot costs hundreds of thousands of yuan, which is too expensive, and most libraries cannot purchase it in bulk.

[0004] In this regard, in view of the defects of the above two book inventory devices, there is an urgent need for a device that utilizes RFID technology, has low manufacturing cost, does not take up too much pedestrian space during operation, and can conduct a comprehensive inventory of books on the entire tall bookcase, and most importantly, saves manpower. Summary of the invention

[0005] In order to make up for the deficiencies in the prior art and achieve the above functions, the present invention provides an automatic cruise inventory counting device for libraries based on RFID.

[0006] The present invention is achieved through the following technical solutions:

[0007] An automatic cruising inventory counting device for a library based on RFID, comprising a translation module fixed on the top of a bookcase and a turning module fixed on the translation module, wherein a detection inventory counting module located beside the bookcase is installed at the bottom of the turning module;

[0008] The translation module includes a translation profile installed along the length direction of the bookcase, a detection groove rail with a top opening is arranged at the center of the translation profile, and a rack is fixed on one side of the detection groove rail, and displacement groove rails are arranged on both sides of the translation profile, and the translation module also includes a carrier plate located above the translation profile, and four groups of horizontal side rollers and longitudinal displacement rollers are arranged at the bottom of the carrier plate, and a servo motor b facing vertically downward is fixed on the carrier plate, and a gear is fixed on the output shaft of the servo motor b and the gear is located below the carrier plate, and the gear is meshed with the rack;

[0009] The turning module includes a vertical rotating shaft rotatably connected to a carrier plate, a transmission wheel a is arranged on the rotating shaft, a convex bearing sheet metal b is also arranged on the carrier plate, a servo motor a is fixed on the upper side of the bearing sheet metal b, and the output shaft of the servo motor a passes through the bearing sheet metal b, a transmission wheel b fixed on the output shaft of the servo motor a is arranged inside the bearing sheet metal b, and the transmission wheel a is connected to the transmission wheel b through a conveyor belt; the turning module also includes a top frame fixed on the top of the rotating shaft;

[0010] The detection and inventory module includes an inventory shield installed on the outside of the top frame. The inventory shield is in the shape of a vertical rectangular plate, and a plurality of RFID antennas arranged up and down are installed inside the shield, and each RFID antenna is consistent with the center height of each layer of the bookcase.

[0011] Further, in order to better realize the present invention, bearing blocks are arranged on both sides of the bottom of the carrier plate, and the side rollers and displacement rollers are rotatably connected to the front and rear ends of each bearing block and are located inside the displacement groove rail, and the displacement groove rail is only opened at the top center position, and each displacement roller abuts against the non-opening part of the top of the displacement groove rail, and each side roller does not contact the upper end surface of the displacement groove rail, and the side rollers abut against both sides of the displacement groove rail;

[0012] Baffles are arranged at the front and rear ends of the translation profile.

[0013] Furthermore, in order to better realize the present invention, two photoelectric switches b are arranged at the bottom of the carrier plate, and a plurality of positioning blocks a compatible with the photoelectric switches b are fixed on the translation profile; a distance sensor c is fixed on the carrier plate and there is a through hole directly below the distance sensor c, and the through hole is directly opposite to the positioning block a on the translation profile.

[0014] Furthermore, in order to better realize the present invention, a "convex" shaped load-bearing sheet metal a is installed on the carrier plate, the rotating shaft passes through the top of the load-bearing sheet metal a, a supporting rib is fixed between the top frame and the rotating shaft, a positioning block b is installed on the support rib, four photoelectric switches a are evenly arranged around the rotating shaft on the top of the load-bearing sheet metal a, the positioning block b is adapted to the photoelectric switch a, and the support rib is perpendicular to the inventory shield.

[0015] Furthermore, in order to better realize the present invention, a controller for controlling the machine is installed at the bottom of the top frame, and side frames are fixed on both sides of the top frame and the inventory shield. The side frames are in an inverted right-angled trapezoid and are provided with a number of square frames for expansion installation. The inner inclined ends of the two side frames are connected with spacer sheet metals, and the top frame is provided with a number of circular holes for reducing weight. The fixing points of the inventory shield and the top frame and side frames are rounded rectangular slots.

[0016] Furthermore, in order to better realize the present invention, a downward distance sensor b is installed on the outer side of each side frame, and a rotating shield is installed on the outer side of the top frame, the side frame and the rotating shield to wrap them. The distance sensor b is located between the rotating shield and the side frame, and distance sensors a are installed on both sides outside the rotating shield and at positions corresponding to the positions of the distance sensor b. The distance sensor a is installed tilted downward, and the sensing distance of the distance sensor a forms an angle with the sensing distance of the distance sensor b.

[0017] Furthermore, in order to better realize the present invention, columns are installed at the four corners of the carrier plate, and a translation shield is installed on the column to wrap the side of the driving component in the translation module. A nylon tank chain is also installed on the carrier plate, and the other end of the nylon tank chain is fixed on the translation profile.

[0018] Furthermore, in order to better realize the present invention, two rows of vertical rails are installed in the inventory shield, and several positioning plates connected by bolts are fixed on the rails. The RFID antenna is installed on the positioning plates, and several protective plates are installed on the inventory shield to completely block the internal RFID antenna.

[0019] Furthermore, in order to better realize the present invention, the controller integrates a single-chip microcomputer module, a positioning tag reading and writing module and a UHF tag reading and writing module, and is provided with a Type-C interface and a USB interface.

[0020] Furthermore, in order to better implement the present invention, the rack and the gear are both helical teeth.

[0021] The beneficial effects of the present invention are:

[0022] (1) The present invention can translate and rotate 360 ​​degrees according to the profile track to conduct a comprehensive inventory of the books on the bookcase, effectively avoiding the error of manual inventory and improving the efficiency of inventory. (2) The present invention is exquisitely designed. It adopts a single-row gear rack meshing transmission design for translation and a belt drive design for rotation. Both translation and rotation are provided with a double insurance of servo motor circle counting and sensor counting to ensure the accuracy of inventory. (3) The present invention is based on RFID technology to carry out book inventory, but reduces the cost of related RFID inventory equipment to about 1,000 yuan. Compared with equipment that costs hundreds of thousands of yuan, it has a broader market prospect. At the same time, the structure of this machine has the advantages of being simple and easy to repair, and the maintenance cost is extremely low. (4) The present invention is also provided with a side sensor for avoiding collision, and a low-noise performance based on a lightweight design of sheet metal structure, which can ensure the safety of operation and reduce the noise to below 40dB, meeting the 45-55dB requirements of the "Library Building Design Code" and the "Urban Area Environmental Noise Standard". (5) The installation and use of the present invention takes up very little space, which is convenient for custom adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the present invention when taking inventory on a bookcase;

[0024] Figure 2 It is a three-dimensional diagram of the entire machine of the present invention;

[0025] Figure 3 Three-dimensional diagram of the internal structure of the present invention Figure 1 ;

[0026] Figure 4 Three-dimensional diagram of the internal structure of the present invention Figure 2 ;

[0027] Figure 5 This is a three-dimensional schematic diagram of the bottom structure of the present invention after removing the translation profile and part of the guard plate;

[0028] Figure 6 Schematic diagram after removing a protective plate for the present invention;

[0029] Figure 7 This is a state diagram of the distance sensor a and the distance sensor b when the present invention is on standby at the origin point on the side of the bookcase;

[0030] Figure 8 A top view of the present invention running on two curved bookcases;

[0031] Fig. 9 The top view of the present invention running on a plurality of rectangular bookcases.

[0032] In the figure:

[0033] 1. Rotating guard, 101. Top frame, 102. Side frame, 103. Spacer sheet metal, 104. Support ribs, 105. Distance sensor a, 106. Distance sensor b, 107. Controller,

[0034] 2. Translation shield,

[0035] 3. Inventory shield, 301, guard plate, 302, rail, 303, positioning plate, 304, RFID antenna,

[0036] 4. Translation profile, 401. Displacement groove rail, 402. Detection groove rail, 403. Rack, 404. Baffle, 405. Nylon tank chain,

[0037] 5. Carrier plate, 501. Carrying bar, 502. Side roller, 503. Displacement roller, 504. Photoelectric switch b, 505. Positioning block a,

[0038] 6. Load-bearing sheet metal a, 601, load-bearing sheet metal b, 602, column,

[0039] 7. Rotating shaft, 701. Transmission wheel a, 702. Conveyor belt, 703. Transmission wheel b, 704. Positioning block b, 705. Photoelectric switch a, 706. Distance sensor c,

[0040] 8. Servo motor a, 801. Servo motor b, 802. Gear. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0043] like Figures 1 to 8 As shown, the present invention comprises a translation module fixed on the top of the bookcase and a turning module fixed on the translation module, and a detection and inventory module located beside the bookcase is installed at the bottom of the turning module;

[0044] refer to Figure 3The translation module includes a translation profile 4 installed along the length direction of the bookcase, which is made of conventional aluminum profile. A detection groove 402 with a top opening is arranged in the center of the translation profile 4, and a rack 403 is fixed on one side of the detection groove 402. Displacement grooves 401 are arranged on both sides of the translation profile 4. The displacement groove 401 and the detection groove 402 are both part of the translation profile 4. The translation profile 4 is integrally formed to ensure sufficient load strength; the translation module also includes a carrier plate 5 located above the translation profile 4, and four groups of horizontal side rollers 502 and longitudinal displacement rollers 503 are arranged at the bottom of the carrier plate 5. A servo motor b801 facing vertically downward is fixed on the carrier plate 5, and a gear 802 is fixed on the output shaft of the servo motor b801, and the gear 802 is located below the carrier plate 5. The gear 802 is meshed with the rack 403 as a displacement carrier; the servo motor b801 provides power to enable the machine to move along the length direction of the translation profile 4.

[0045] The turning module includes a vertical rotating shaft 7 rotatably connected to a carrier plate 5; the step design of the shaft, the ferrule limit, and the matching of the shaft and the bearing are all prior art, and are well known to those skilled in the art and will not be described in detail; a transmission wheel a701 is provided on the rotating shaft 7, and a convex bearing sheet metal b601 is also provided on the carrier plate 5, a servo motor a8 is fixed above the bearing sheet metal b601, and the output shaft of the servo motor a8 passes through the bearing sheet metal b601, and a transmission wheel b703 fixed on the output shaft of the servo motor a8 is provided on the inner side of the bearing sheet metal b601, and the transmission wheel a701 is connected to the transmission wheel b703 by a conveyor belt 702; the turning module also includes a top frame 101 fixed on the top of the rotating shaft 7; the key connection and bolt clamping connection between the transmission wheel a701, the transmission wheel b703 and the shaft are also prior art and will not be described in detail.

[0046] refer to Figure 8 The detection and inventory module includes an inventory shield 3 installed on the outside of the top frame 101. The inventory shield 3 is in the shape of a vertical rectangular plate, and a plurality of RFID antennas 304 arranged up and down are installed inside the shield. Each RFID antenna 304 is consistent with the center height of each layer of the bookcase to ensure that the electronic tags of the books on each layer are read.

[0047] The present invention ensures the balance of the inspection and counting module by relying on the weight of the translation module on the one hand and the contact between the displacement roller 503 and the displacement groove rail 401 on the other hand.

[0048] like Figures 3 to 5As shown, both sides of the bottom of the carrier plate 5 are provided with bearing blocks 501, which are used to connect the bearing components. The side rollers 502 and the displacement rollers 503 are rotatably connected to the front and rear ends of each bearing block 501 and are both located inside the displacement groove 401. The displacement groove 401 is only opened at the top center position. Each displacement roller 503 abuts against the non-opening part of the top of the displacement groove 401 to ensure the displacement sliding of the machine while preventing overturning with upper and lower limits. Each side roller 502 does not contact the upper end surface of the displacement groove 401 to reduce friction noise as much as possible. The side rollers 502 abut against both sides of the displacement groove 401 to ensure the left and right limits of the machine.

[0049] Baffles 404 are provided at the front and rear ends of the translation profile 4 to prevent excessive translation and subsequent falling due to failure of the driving component.

[0050] Two photoelectric switches b504 are arranged at the bottom of the carrier plate 5, and a plurality of positioning blocks a505 matched with the photoelectric switches b504 are fixed on the translation profile 4, which are used to limit the extreme position when the machine is translated forward and backward. A distance sensor c706 is fixed on the carrier plate 5, and there is a through hole directly below the distance sensor c706. The through hole is opposite to the positioning block a505 on the translation profile 4, and induction is generated when passing through different bookcases, and counting is performed to accurately locate and distinguish each bookcase.

[0051] A "convex"-shaped bearing sheet metal a6 is installed on the carrier plate 5, and the rotating shaft 7 passes through the top of the bearing sheet metal a6. A supporting rib 104 is fixed between the top frame 101 and the rotating shaft 7, and a positioning block b704 is installed on the supporting rib 104. Four photoelectric switches a705 are evenly arranged around the rotating shaft 7 on the top of the bearing sheet metal a6, that is, each is spaced 90 degrees apart for rotational positioning. The positioning block b704 is matched with the photoelectric switch a705, which is the second safety besides the servo motor control angle. The supporting rib 104 is perpendicular to the inventory shield 3, that is, every time the inventory shield 3 rotates 90 degrees, the corresponding photoelectric switch a705 receives a signal.

[0052] A controller 107 for controlling the machine is installed at the bottom of the top frame 101, which is used to control the entire machine, receive signals, and process data. Side frames 102 are fixed on both sides of the top frame 101 and the inventory shield 3. The side frames 102 are in an inverted right-angled trapezoid to make room for the inclined installation of the spacer sheet metal 103, and a number of boxes for expansion installation are provided on the side frames 102 to provide installation space for the future installation of AI modules. The inner inclined ends of the two side frames 102 are connected with spacer sheet metal 103 for shielding components, which are inclined to avoid rotation interference. The top frame 101 is provided with a number of circular holes for reducing weight. The fixing points of the inventory shield 3 and the top frame 101 and the side frame 102 are rounded rectangular slots. Due to the limited sensing distance of RFID technology, the rounded rectangular slots can facilitate the adjustment of the distance between the rotating shield 1 and the bookcase when installing the machine.

[0053] like Figure 3 , Figure 5 and Figure 7 As shown, a downward distance sensor b106 is installed on the outer side of each side frame 102, and a rotating shield 1 is installed on the outer side of the top frame 101, the side frame 102 and the rotating shield 1 to wrap them. The distance sensor b106 is located between the rotating shield 1 and the side frame 102, and distance sensors a105 are installed on both sides outside the rotating shield 1 and at positions corresponding to the positions of the distance sensors b106. The distance sensor a105 is installed tilted downward, and the sensing distance of the distance sensor a105 forms an angle with the sensing distance of the distance sensor b106 to avoid pedestrians and avoid affecting the retrieval of books while ensuring safety.

[0054] The four corners of the carrier plate 5 are installed with columns 602, and the columns 602 are installed with translation shields 2 that wrap the sides of the driving components in the translation module. A nylon tank chain 405 is also installed on the carrier plate 5 to reduce noise. The other end of the nylon tank chain 405 is fixed on the translation profile 4. The nylon tank chain 405 is folded with the movement of the translation module to effectively prevent excessive bending of the cable.

[0055] like Figure 5 and Figure 8 As shown, two rows of vertical rails 302 are installed in the inventory shield 3, and a plurality of positioning plates 303 connected by bolts are fixed on the rails 302. The positioning plates 303 can be customized on the rails 302 according to the height of the bookcases at different levels, or different numbers of bookcases, to add or delete. The RFID antenna 304 is installed on the positioning plate 303, which is used to detect the labels on the books. The inventory shield 3 is installed with a plurality of guard plates 301 to completely block the internal RFID antenna 304 to ensure beauty and safety.

[0056] The controller 107 integrates a wireless transmission module, a single-chip microcomputer module, a positioning tag reading and writing module and a UHF tag reading and writing module, and controls the local machine, tag data reading and writing, and network transmission according to the program. The controller 107 is provided with a Type-C interface and a USB interface.

[0057] The rack 403 and the gear 802 are both helical teeth, which ensure horizontal load bearing and low noise.

[0058] The working principle of the present invention is:

[0059] (1) When installing the machine, calibrate the zero to ensure that the machine is in the Figure 7 The origin position is in the width direction of the bookcase.

[0060] (2) The controller 107 has a built-in coding program, which can be used for automatic timing control or manual remote start operation;

[0061] The servo motor b801 drives the gear 802 at the bottom to rotate. Since the rack 403 is fixed, the gear 802 rotates and drives the machine to move along the length direction of the bookcase. Fig. 9 ) The relevant components for detecting inventory are at a 90-degree direction to the translation profile 4. The RFID antenna 304 on each layer will inventory (read data) the tags on each layer of books, and then transmit the data to the controller 107. The controller 107 uploads the data to the host computer, which analyzes and compares the data and records the location and information of the relevant books. The system automatically updates the book information database in the library management system based on the inventory results.

[0062] (3) When the servo motor b801 reaches the corresponding number of revolutions, at the same time the photoelectric switch b504 (counting) detects the positioning block a505 at the edge (reference Figure 8 Position), at this time, the servo motor a8 rotates, and drives the rotating shaft 7 to rotate 90 degrees and 180 degrees through the conveyor belt 702, so as to collect the inventory of the book information on the circular bookcase; when rotating, the angle is converted by the number of turns of the servo motor b801, and on the other hand, the photoelectric switch a705 is used to check 90 degrees and 180 degrees, that is, double insurance.

[0063] (4) After the 180-degree turn is completed, the servo motor b801 reverses and continues to drive the reverse translation. During the entire translation process, the position can be recorded by the number of rotations of the servo motor b801. At the same time, several positioning blocks a505 on the groove rail 402 will also be detected and counted. The count data corresponds to the data of the number of rotations to accurately locate the bookcase position of the machine.

[0064] (5) When the machine has completed the inventory of the books and materials on the entire bookcase: for a square bookcase, it will wait in the bookless area on the side; for a circular bookcase, it will wait in a narrow width area. When someone approaches the inventory cover 3 of the machine, or the inventory cover 3 of the machine affects the retrieval of books, the distance sensor a105 and the distance sensor b106 of the machine will send a signal to automatically move the machine to other positions at a slow speed; during the operation of the machine, if the distance sensor a105 and the distance sensor b106 detect an obstacle, the machine will stop running.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. An automatic cruise inventory counting device for libraries based on RFID, characterized in that: It includes a translation module fixed on the top of the bookcase and a turning module fixed on the translation module, and a detection and inventory module located beside the bookcase is installed at the bottom of the turning module; The translation module comprises a translation profile (4) installed along the length direction of the bookcase, a detection groove rail (402) with a top opening is arranged at the center of the translation profile (4), and a rack (403) is fixed on one side of the detection groove rail (402), and displacement groove rails (401) are arranged on both sides of the translation profile (4), and the translation module also comprises a carrier plate (5) located above the translation profile (4), and four groups of horizontal side rollers (502) and longitudinal displacement rollers (503) are arranged at the bottom of the carrier plate (5), and a servo motor b (801) facing vertically downward is fixed on the carrier plate (5), and a gear (802) is fixed on the output shaft of the servo motor b (801), and the gear (802) is located below the carrier plate (5), and the gear (802) is meshed with the rack (403); The turning module comprises a vertical rotating shaft (7) rotatably connected to a carrier plate (5), a transmission wheel a (701) being arranged on the rotating shaft (7), a convex supporting sheet metal b (601) being further arranged on the carrier plate (5), a servo motor a (8) being fixed above the supporting sheet metal b (601), and an output shaft of the servo motor a (8) passing through the supporting sheet metal b (601), a transmission wheel b (703) being fixed on the output shaft of the servo motor a (8) being arranged on the inner side of the supporting sheet metal b (601), and the transmission wheel a (701) and the transmission wheel b (703) being connected via a conveyor belt (702); the turning module also comprises a top frame (101) fixed on the top of the rotating shaft (7); The detection and inventory module comprises an inventory protection cover (3) installed on the outside of the top frame (101), the inventory protection cover (3) is in the shape of a vertical rectangular plate, and a plurality of RFID antennas (304) arranged vertically are installed inside the inventory protection cover, and each RFID antenna (304) is consistent with the center height of each layer of the bookcase; Two photoelectric switches b (504) are arranged at the bottom of the carrier plate (5), and a plurality of positioning blocks a (505) adapted to the photoelectric switches b (504) are fixed on the translation profile (4); a distance sensor c (706) is fixed on the carrier plate (5), and a through hole is directly below the distance sensor c (706), and the through hole is directly opposite to the positioning block a (505) on the translation profile (4); A "convex"-shaped fixed sheet metal a (6) is mounted on the carrier plate (5); the rotating shaft (7) passes through the top of the fixed sheet metal a (6); a supporting rib (104) is fixed between the top frame (101) and the rotating shaft (7); a positioning block b (704) is mounted on the supporting rib (104); four photoelectric switches a (705) are evenly arranged on the top of the fixed sheet metal a (6) around the rotating shaft (7); the positioning block b (704) is matched with the photoelectric switch a (705); and the supporting rib (104) is perpendicular to the inventory protection cover (3); A controller (107) for controlling the machine is installed at the bottom of the top frame (101), and side frames (102) are fixed on both sides of the top frame (101) and the inventory shield (3), the side frames (102) are in the shape of an inverted right-angled trapezoid, and a plurality of square frames for expansion installation are arranged on the side frames (102), and the inner inclined ends of the two side frames (102) are connected with a spacer sheet metal (103), and a plurality of round holes for reducing weight are arranged on the top frame (101), and the fixing points of the inventory shield (3) and the top frame (101) and the side frames (102) are rounded rectangular slots; Each side frame (102) is provided with a downwardly facing distance sensor b (106) on the outer side thereof; a rotating shield (1) is provided on the outer side of the top frame (101), the side frame (102) and the rotating shield (1) to wrap the rotating shield; the distance sensor b (106) is located between the rotating shield (1) and the side frame (102); distance sensors a (105) are provided on both sides outside the rotating shield (1) and at positions corresponding to the positions of the distance sensors b (106); the distance sensors a (105) are provided with a downwardly facing tilt; the sensing distance of the distance sensor a (105) and the sensing distance of the distance sensor b (106) form an angle.

2. The RFID-based automatic cruise inventory counting device for libraries according to claim 1 is characterized in that: The bottom sides of the carrier plate (5) are provided with bearing blocks (501), the side rollers (502) and the displacement rollers (503) are rotatably connected to the front and rear ends of each bearing block (501) and are located inside the displacement groove rail (401), the displacement groove rail (401) is open only at the top center position, each displacement roller (503) is abutted against the non-opening portion of the top of the displacement groove rail (401), each side roller (502) is not in contact with the upper end surface of the displacement groove rail (401), and the side rollers (502) are abutted against both sides of the displacement groove rail (401); Baffles (404) are provided at the front and rear ends of the translation profile (4).

3. The RFID-based automatic cruise inventory counting device for libraries according to claim 1 is characterized in that: The four corners of the carrier plate (5) are provided with upright posts (602), on which a translation shield (2) is installed for wrapping the side of the driving component in the translation module. The carrier plate (5) is also provided with a nylon tank chain (405), the other end of which is fixed to the translation profile (4).

4. The RFID-based automatic cruise inventory counting device for libraries according to claim 1 is characterized in that: Two rows of vertical rails (302) are installed in the inventory-checking shield (3), a plurality of positioning plates (303) connected by bolts are fixed on the rails (302), the RFID antenna (304) is installed on the positioning plates (303), and a plurality of guard plates (301) are installed on the inventory-checking shield (3) to completely shield the internal RFID antenna (304).

5. The RFID-based automatic cruise inventory counting device for libraries according to claim 1 is characterized in that: The controller (107) is integrated with a single-chip microcomputer module, a positioning tag reading and writing module and a UHF tag reading and writing module, and the controller (107) is provided with a Type-C interface and a USB interface.

6. The RFID-based automatic cruise inventory counting device for libraries according to claim 1 is characterized in that: The rack (403) and the gear (802) are both helical teeth.

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