CN110765803A

CN110765803A - Invisible two-dimensional code and identification system thereof

Info

Publication number: CN110765803A
Application number: CN201910966826.6A
Authority: CN
Inventors: 李冉
Original assignee: Xuanwu Hospital
Current assignee: Xuanwu Hospital
Priority date: 2019-10-11
Filing date: 2019-10-11
Publication date: 2020-02-07
Anticipated expiration: 2039-10-11
Also published as: CN110765803B

Abstract

The invention relates to an invisible two-dimensional code recognition system, which at least comprises a light-proof object, an infusion two-dimensional code label attached to the light-proof object and a two-dimensional code scanner, wherein the interior of the light-proof object is used for bearing flowing fluid, the recognition system is configured to, when the two-dimensional code scanner is started, determining a volume relationship between the light-shielding object currently used and the fluid flowing in the light-shielding object based on the volume information of the light-shielding object and the volume information of the fluid flowing in the light-shielding object manually input by a user, so as to identify the transfusion two-dimensional code label in the volume relationship through the two-dimensional code scanner, the volume relationship includes at least one bag shape simulation information corresponding to the bag shape simulation information retrieved from a bag shape simulation library associated with the light-shielding object, and the bag shape simulation information can be used to describe the degree of bag deformation of the light-shielding object loaded with the flowing fluid on the basis of the light-shielding object not loaded with the flowing fluid.

Description

Invisible two-dimensional code and identification system thereof

Technical Field

The invention relates to the technical field of communication and data processing, in particular to an invisible two-dimensional code and an identification system thereof.

Background

A Hospital Information System (HIS for short) is rapidly developed and simultaneously forms a large amount of medical data, so that on one hand, the service efficiency and quality of a Hospital are improved, but on the other hand, the Information acquisition, storage, processing and processing are dispersed in a plurality of links and different department-level Information systems, the dispersed systems cannot be mutually communicated, and a large amount of medical data cannot be shared. The traditional manual data acquisition mode (or called checking mechanism) completely depends on manual checking, the name, the hospitalization number and the infusion label of a patient need to be inquired orally for checking, and errors are caused by the fact that the patient does not hear clearly or has unclear speech, wrong response occurs, and other patients are accepted blindly for infusion.

The application range and functional requirements of the vast amount of medical data in hospitals are mainly focused on two aspects: identification and sample identification. The identification of the identity mainly refers to the identification of the identity of a patient, and the identification of the sample mainly comprises the identification of medicines, equipment and test specimens. The hospital combines the two-dimensional Code (also called two-dimensional bar Code, QR Code for short) scanning technology widely used at present, realizes effective identification of a large amount of medical data, and reduces errors possibly occurring in the operation process of a medical data system, thereby optimizing the service flow of the hospital and greatly improving the management efficiency. The QRCode can be scanned by a handheld device (PDA for short) for medical care, whether medical advice information is consistent with the identity of a patient and whether medicines are consistent or not is checked, the identity QR Code of the patient is scanned to be matched with the infusion label QR Code before the patient receives, changes and removes infusion, and the patient can be timely and correctly identified, so that the operation can be carried out, and the infusion is ensured to be in a safe state. The traditional manual judgment and identification are abandoned, and the safety of infusion is enhanced, so that the phenomenon of medication error is avoided, and the safety of nursing work is ensured.

The original double-person checking and execution functions are changed into reminding functions of checking and executing medical advice of a person and a smart phone. At present, nursing staff are in a very short supply, and the clinical application of the QR Code relatively reduces the waste of manpower so as to better and reasonably arrange staff and realize target management. During the transfusion process of the patient, the patient can know some functions and functions of the PDA machine. From the perspective of the patient, the patient is entitled to the patient's knowledge in the process of learning. And the application of some high-tech technologies can ensure that the patient feels the own rights and interests are effectively guaranteed. Meanwhile, the coordination degree of the patients is improved, the patients participate in the treatment, the communication between the nursing patients is realized, and the overall quality of nurses is fully expressed due to the common topic.

The principle of barcode recognition was first proposed by n.t. woodland in the united states in 1949. With the increasing popularity of computer applications, the use of bar code identification has been greatly developed. The bar code can mark information such as the country of production, manufacturer, name of the commodity, date of production, book classification number, start and stop location of mail, category, date and the like, so that the bar code is widely applied to many fields such as commodity circulation, book management, post and telecommunications management, bank systems and the like. The bar code is one of the most economical and practical automatic identification technologies so far, not only has high input speed, but also has high reliability, and the error rate is lower than one millionth.

The QR Code records data symbol information by using black and white patterns which are distributed on a plane (two-dimensional direction) according to a certain rule by using a certain specific geometric figure. The QR Code is one of DOIs (Digital object unique Identifier),

hospitals incorporate the currently widely used QR Code scanning technology to identify patients. During admission, the patient wears a wristband printed with a QR Code, which includes not only the name, age, sex, and hospitalization number of the patient, but also various information such as the admission diagnosis and the name of the allergy medication. Such information is mainly taken from hospital information systems and forms a label wrist by printing. Once worn, it cannot be removed unless the treatment requires it, in order to correctly identify the patient. The QR Code scanning technology is combined with a hospital information system, and the whole process from admission treatment to discharge of a patient can be accurately processed. As the QR Code technology has stronger automatic identification capability and quite high processing speed, the patient does not need to register again in a plurality of nursing links such as medicine distribution, specimen collection, transfusion and the like, thereby avoiding the generation of human errors and effectively ensuring the comprehensiveness and the accuracy of information.

In clinical treatment, some medicines (such as sodium aminosalicylate, sulindac enoxacin gluconate for injection, antifungal medicines, sodium nitroprusside, fleroxacin glucose injection, chemotherapeutic medicines and the like) are easily decomposed, deteriorated, discolored and reduced in drug effect under the action of light, and some medicines even generate harmful substances.

In the prior art, as disclosed in patent document No. CN107441583A, a light shade for a light-shielding bag is disclosed, which comprises a bag body, wherein two connecting belts are oppositely arranged at an opening at the upper end of the bag body, the two connecting belts are connected through a lock catch at the front side, a detection device is arranged on the upper surface of the connecting belts, a hook is fixed on the upper end surface of the detection device, a mounting sleeve is arranged on a through hole at the lower end surface of the bag body, an observation window is arranged at the middle part of the front side surface of the bag body, the light shade for the light-shielding bag is simple in structure and convenient to use, the infusion bag is shielded through the bag body, a bottle stopper of the infusion bag is exposed to the lower side of the bag body through the mounting sleeve, the detection device detects the whole weight, and prompts through an alarm when the liquid medicine is running out, so that a nurse can change the medicine in time, avoid frequent, guarantee the closure of bag body shading, the draw-in groove is used for placing patient's data.

Patent document No. CN206342693U discloses a light-proof bag, which comprises a bag body, and is characterized in that: the bag comprises a bag body and is characterized in that an opening is formed in the top of the bag body, a hanging hole is formed below the opening, a liquid outlet is formed in the bottom of the bag body, the liquid outlet is in a V shape with a large upper part and a small lower part, a scanning window is arranged on one side of the bag body, the position of the scanning window corresponds to the adhering position of a two-dimensional code label of a transfusion bag, and an observation window is formed in the other side of the bag body and used for observing the; the scanning window and the observation window are both provided with a shading curtain, the lower end of the shading curtain is connected with the bag body through a thread gluing, the opening at the top of the bag body is provided with a concave-convex buckle, and the concave-convex buckle is positioned below the hanging hole. The utility model discloses a simple structure, convenient to use, the leakproofness is good, is convenient for observe and scan, is favorable to exhaling of the interior medicine of infusion bag moreover, can fully satisfy the safe smooth use that need the instillation medicine of light-resistant.

In the prior art, as for the infusion process of the light-resistant liquid medicine, the design aims at solving the problem of how to simultaneously ensure the acquisition of the medicine information and the safety of the light-resistant liquid medicine during infusion, and the problems of high difficulty in acquiring the two-dimensional code information and complex operation in the actual infusion process are not considered.

Specifically, the method comprises the following steps: because when in actual use, in order to guarantee the reuse of the light-proof bag, the infusion two-dimensional code label carrying the medicine information is usually attached to the infusion bag as the inner bag, so that the medical personnel is required to scan the two-dimensional code on the infusion bag through the light-proof bag or take out the infusion bag with the medicine to scan and then cup joint the light-proof bag again. When medical personnel scans the two-dimensional code on the infusion bag through the light-shielding bag, although the light-shielding bag is semitransparent, the light-shielding bag has too high reflection degree, and the position of the bar code can be seen visually by the medical personnel, but the bar code scanner/bar code scanning gun cannot read under the condition of too high reflection degree, so that in actual use, the medical personnel is often required to be tightly attached to the inner-layer bag body and the outer-layer bag body manually so as to improve the readable degree of the two-dimensional code on the inner layer; wherein, when medical personnel take out the infusion bag that is equipped with the medicine, cup joint the light-proof bag again after scanning the two-dimensional code on the bag again, this in-process, medical personnel need tear infusion bag open from the infusion support frame earlier, open the light-proof bag and take out infusion bag, use bar code scanner bar code scanning rifle to scan the two-dimensional code after, connect back the light-proof bag with the infusion bag cover again in, place the light-proof bag on the infusion support frame then. Moreover, because of the problem of the difference in understanding of medical staff, it is unclear how to align the scanning device to the two-dimensional code or to which specific position when using the scanning device, so that the height difference between the infusion bag and the height of the medical staff, the scanning distance between the infusion bag and the scanning device held by the medical staff, and the like, will cause the scanning angle deviation formed between the scanning device and the two-dimensional code to be too large during scanning, and the situations of multiple scanning failures and long time for acquiring the medicine information occur, and often require the medical staff to continuously adjust the scanning angle of the handheld scanning device or the scanning distance between the scanning device and the two-dimensional code.

Therefore, no matter the two-dimensional code on the infusion bag is scanned through the light-shielding bag, or the light-shielding bag is sleeved again after the infusion bag filled with the medicine is taken out for scanning, in the actual operation process, the operation processes of the two are very complicated, the unnecessary workload of medical personnel is inevitably increased, the treatment duration of a patient is prolonged, meanwhile, the time of exposing the internal medicine to light is also prolonged, and the potential danger that the medicine is decomposed and loses efficacy even generates toxic and side effects due to the visible light is increased.

Furthermore, on the one hand, due to the differences in understanding to the person skilled in the art; on the other hand, since the inventor has studied a lot of documents and patents when making the present invention, but the space is not limited to the details and contents listed in the above, however, the present invention is by no means free of the features of the prior art, but the present invention has been provided with all the features of the prior art, and the applicant reserves the right to increase the related prior art in the background.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an identification system of an invisible two-dimensional code, which at least comprises a light-proof object, an infusion two-dimensional code label attached on the light-proof object and a two-dimensional code scanner, wherein the interior of the light-proof object is used for bearing flowing fluid, the identification system is configured to determine the volume relationship between the light-proof object currently used and the flowing fluid in the light-proof object based on the volume information of the light-proof object and the volume information of the flowing fluid in the light-proof object, which are manually input by a user when the two-dimensional code scanner is started, so as to identify the infusion two-dimensional code label in the volume relationship through the two-dimensional code scanner, the volume relationship at least comprises at least one bag shape simulation information corresponding to the infusion two-dimensional code label, which is obtained from a bag shape simulation library related to the light-proof object, the bag shape simulation information can be used to describe the degree of deformation of the bag when the light-shielding object loaded with the fluid is not loaded with the fluid.

According to a preferred embodiment, the identification system at least comprises a light-avoiding bag, the light-avoiding object is sleeved in the light-avoiding bag, the light-avoiding bag is used for carrying out light-avoiding treatment on the interior of the light-avoiding bag and enabling the infusion two-dimensional code label to be in a difficult-to-identify state, the two-dimensional code scanner can identify the infusion two-dimensional code label under a scanning condition, and the process of identifying the infusion two-dimensional code label area by the two-dimensional code scanner under the scanning condition in the identification system at least comprises one or more of the following steps:

when the two-dimensional code scanner is started, the identification system acquires the current ambient illumination intensity through a camera of the two-dimensional code scanner and compares the ambient illumination intensity with a preset illumination intensity, and the identification system dynamically controls the main light supplement intensity of a light supplement light source in the two-dimensional code scanner; when a code scanning instruction is received, a two-dimensional code image corresponding to an infusion two-dimensional code label to be analyzed is obtained through a camera of the two-dimensional code scanner, and the identification system performs rapid scanning identification in a mode of dynamically correcting the main supplementary lighting intensity of the supplementary lighting light source in a small amplitude; when the two-dimensional code scanner cannot complete two-dimensional code image information identification within a preset first time length, the identification system calls a two-dimensional code analysis scheme with the highest selection score from the scheme set based on the selection score corresponding to each two-dimensional code analysis scheme in the scheme set, and performs scanning identification again at the cost of selecting the processing capability feature of one of the two-dimensional code analysis schemes with the lower selection score; when the two-dimension code scanner cannot complete the information identification of the two-dimension code image within a preset second time length, the identification system reevaluates and determines the selection score corresponding to each two-dimension code analysis scheme in the scheme set, one of the two-dimension code analysis schemes with lower scores is called from the scheme set, and the two-dimension code image corresponding to the infusion two-dimension code label to be analyzed is obtained again and is scanned and identified again to obtain a scanning result.

According to a preferred embodiment, the process of identifying the two-dimensional code scanner in the identification system under the scanning condition to the infusion two-dimensional code label area at least comprises one or more of the following steps:

when the two-dimensional code scanner is started, the identification system calls a scheme set comprising at least two different two-dimensional code analysis schemes in a two-dimensional code analysis scheme knowledge base based on bag body form simulation information of a light-resistant object determined by a volume relation between the light-resistant object and a fluid flowing in the light-resistant object, wherein the volume relation is currently used, and a selection score corresponding to each two-dimensional code analysis scheme in the scheme set is initialized, wherein the selection score at least relates to a deformation feature label of the bag body form simulation information and/or a processing capability feature corresponding to each two-dimensional code analysis scheme.

According to a preferred embodiment, the initialization process of the selection score corresponding to each two-dimensional code parsing scheme in the scheme set in the identification system at least includes one or more of the following steps:

the identification system determines a deformation characteristic label of bag shape simulation information and the ambient illumination intensity related to the first area in the first area at a first moment T, and calls historical scanning data corresponding to the deformation characteristic label in a cloud historical scanning database to obtain one or more of a first prediction selection score, a second prediction selection score and/or a third prediction selection score corresponding to each two-dimensional code analysis scheme; and the identification system carries out weighted summation on the first prediction selection score, the second prediction selection score and/or the third prediction selection score according to a preset weight distribution coefficient so as to initialize the selection score corresponding to each two-dimensional code analysis scheme.

the identification system determines a deformation characteristic label of bag shape simulation information and the ambient illumination intensity related to a first area in the first area at a first time T, and calls first historical scanning data corresponding to the deformation characteristic label in a cloud historical scanning database, wherein the first historical scanning data at least comprises a plurality of historical scanning data which are acquired within a time range and have the same deformation characteristic label and at least one two-dimensional code analysis scheme, so as to obtain a first prediction selection score corresponding to each two-dimensional code analysis scheme; the identification system calls second historical scanning data corresponding to the deformation feature tags in a cloud historical scanning database, wherein the second historical scanning data at least comprises a plurality of historical scanning data which are acquired in a time range and in a first area and have the same deformation feature tags and at least one two-dimensional code analysis scheme, so that a second prediction selection score corresponding to each two-dimensional code analysis scheme is obtained; the identification system calls third history scanning data corresponding to the deformation characteristic labels in a cloud history scanning database, wherein the third history scanning data are a plurality of history scanning data with the same deformation characteristic labels, the same ambient light intensity and at least one two-dimensional code analysis scheme, and a third prediction selection score corresponding to each two-dimensional code analysis scheme is obtained.

According to a preferred embodiment, the weight distribution coefficient for initializing the selection score is a coefficient preset to make the different calling conditions comparable and additive based on the corresponding different processing capability characteristics of each two-dimensional code resolution scheme under the calling conditions of the different historical scan data, and the processing capability characteristics at least comprise one or more of a deformation characteristic label, ambient light intensity, acquisition time and the number of historical scan data.

According to a preferred embodiment, the identification system is further configured to perform the steps of:

when a code scanning instruction is received to perform quick scanning identification, a first image of a transfusion two-dimensional code label and a first environment illumination intensity during shooting of the first image are determined, when the two-dimensional code scanner cannot complete two-dimensional code image information identification within a preset first time length or a preset second time length, a second image of the transfusion two-dimensional code label and a second environment illumination intensity during shooting of the second image are determined, brightness analysis is respectively performed on the first image and the second image to obtain a first brightness value corresponding to the first image and a second brightness value corresponding to the second image, and when the deviation between the first brightness value and the first environment illumination intensity and/or the deviation between the second brightness value and the second environment illumination intensity exceed a preset system allowable range, correction of the two-dimensional code scanner under the first environment illumination intensity is determined based on the deviation between the first brightness value and the first environment illumination intensity And determining correction parameters of the two-dimensional code scanner under the second environment illumination intensity by using the parameters and/or the deviation between the second brightness value and the second environment illumination intensity so as to optimize the measurement distortion error of the imaging optical device of the two-dimensional code scanner when the light-avoiding bag is sleeved outside the two-dimensional code scanner for identifying the two-dimensional code which can be switched between the first light transmission state and the second light transmission state.

According to a preferred embodiment, at least a part of the bag body of the light-shielding bag is a multilayer structure, the multilayer structure at least comprises two conductive substrate layers and a light-adjusting layer arranged between the two conductive substrate layers, and the light-adjusting layer can be used for switching between a first light transmission state and a second light transmission state of the multilayer structure.

An invisible two-dimensional code, which is attached to a light-shielding object in the form of an infusion two-dimensional code label, the inside of the light-shielding object is used for bearing flowing fluid, the infusion two-dimensional code label can be identified by a two-dimensional code scanner under scanning conditions, the two-dimensional code is provided with an identification system according to one of the preceding claims, at least part of a bag body on the light-shielding bag is of a multilayer structure, the multilayer structure at least comprises two conductive substrate layers and a light modulation layer arranged between the two conductive substrate layers, the light modulation layer can be used for switching a first light transmission state and a second light transmission state of the multilayer structure, wherein a driving voltage output end of the two-dimensional code scanner is electrically connected with at least one conductive substrate layer to form a closed loop, and when the two-dimensional code scanner is aligned with an infusion two-dimensional code label area, the driving voltage parameters output by the two-dimensional code scanner can be adjusted through a voltage control instruction generated by the two-dimensional code scanner, and when the driving voltage parameters applied to at least one conductive substrate layer by the two-dimensional code scanner are controlled to change, the dimming layer is switched from the first light transmission state to the second light transmission state in a mode that light rays propagating inside the dimming layer are refracted at different angles, so that the light guiding function of the dimming layer is realized, the scanning condition of the two-dimensional code scanner is met, the infusion two-dimensional code label positioned inside the label area can be identified by the two-dimensional code scanner positioned outside the label area in a short-time visible mode, and when the identification process is completed and the electric connection relation between the driving voltage output end and at least one conductive substrate layer is disconnected, the dimming layer is switched from the second light transmission state to the conductive substrate layer in a mode that the light rays propagating inside the dimming layer are refracted at different angles The first light transmission state further realizes the light selectivity passing function, and the scanning condition of the two-dimension code scanner is insufficient, so that the infusion two-dimension code label is recovered to a difficult-to-identify state which is difficult to identify by the two-dimension code scanner.

According to a preferred embodiment, the light-shielding bag has a plurality of strip-shaped layers adjacent to each other in an imaginary designated direction parallel to the surface of the bag body, each strip-shaped layer is of the multilayer structure, wherein a driving voltage output end of the two-dimensional code scanner is electrically connected with at least one conductive substrate layer to form a closed loop, at least one strip-shaped layer corresponding to an infusion two-dimensional code label region is determined based on the position of the infusion two-dimensional code label region, when the two-dimensional code scanner is aligned with the infusion two-dimensional code label region, the two-dimensional code scanner is controlled to change a driving voltage parameter applied to at least one conductive substrate layer, so that the inside of at least one strip-shaped layer corresponding to the infusion two-dimensional code label region is visible, and the rest strip-shaped layers are kept in an invisible state, and thus the two-dimensional code can pass through the light-shielding bag in a selective region transmission manner under the condition that the visible time and the visible light area Identified by the scanner.

The invisible two-dimensional code and the recognition system provided by the invention at least have the following beneficial technical effects:

the invisible two-dimensional code recognition system provided by the invention is particularly used for recognizing a two-dimensional code sleeved in a light-proof object loaded with a certain amount of liquid medicine and having a certain deformation amount, does not need medical personnel to manually flatten the deformation amount of the light-proof object positioned at a higher position with great effort or repeatedly take out and sleeve the light-proof object, directly and simply and directly obtains the scanning condition required by a two-dimensional code bar code by determining the volume relation between the light-proof object and flowing fluid in the light-proof object, and is combined with a cloud information interaction mode to carry out applicability analysis on a two-dimensional code recognition scheme and light supplement intensity, so that the invisible two-dimensional code recognition system can not only carry out rapid and accurate recognition in a mode of obviously minimizing the misjudgment probability and the time consumption of recognition failure, but also constantly optimize the measurement distortion errors of imaging optical devices of different two-dimensional code scanners so as to be suitable, especially, be applicable to the discernment that is equipped with the two-dimensional code that keeps away the light bag and this keep away light bag can switch between two kinds of light transmission states in discernment outside cover, all do not need medical personnel to hug closely the inlayer bag body manually at whole scanning in-process to still avoided taking out the light object and made the adverse effect of inside medicine expose under light for a long time.

Drawings

FIG. 1 is a simplified structural connection diagram of a pre-use identification system provided by the present invention;

FIG. 2 is a simplified structural connection diagram of the identification system of the present invention in use; and

fig. 3 is a simplified cross-sectional structure diagram of the multi-layer structure of the light-proof bag provided by the present invention.

List of reference numerals

1: light-shielding object 2: infusion two-dimensional code label 3: light-proof bag

4: two-dimensional code scanner 5: the flowing fluid 6: first electrode sheet

7: second electrode sheet 8: the holding member 9: conductive substrate layer

10: the light modulation layer 11: voltage output terminal

Detailed Description

The present invention will be described in detail below.

As shown in fig. 1, the present invention provides an invisible two-dimensional code and identification system, and it is preferable to hereinafter describe the present invention in detail by taking the light-shielding object 1 as an infusion bag 1 and correspondingly taking the flowing fluid 5 as a light-shielding liquid 5 having hydrodynamic characteristics. The identification system at least comprises an infusion two-dimensional code label 2 attached to an infusion bag 1, a light-avoiding bag 3 and a two-dimensional code scanner 4. The infusion bag 1 is sleeved in the light-proof bag 3 and is used for bearing light-proof liquid medicine 5 and an infusion two-dimensional code label 2. The light-proof bag 3 is used for carrying out light-proof treatment on the interior of the bag and enabling the transfusion two-dimensional code label 2 to be in the invisible state. The two-dimensional code scanner 4 can identify the infusion two-dimensional code label 2 under scanning conditions. Preferably, as shown in fig. 3, at least a part of the light-shielding bag 3 is a multi-layer structure. The multilayer structure comprises at least two conductive substrate layers 9 and a dimming layer 10 arranged between the two conductive substrate layers 9. The dimming layer 10 can be used to switch between a first light transmission state and a second light transmission state of the multilayer structure. The first light transmission state is a translucent state, and the second light transmission state is a transparent state. The first light transmitting state is a light scattering state. The second light transmission state is a light transmission state.

The area of the transfusion two-dimensional code label 2 on the light-proof bag 3 is determined based on visual observation. When need not to discern infusion two-dimensional code label 2, this light-resistant bag 3 is in the translucent first light and sees through the state, and medical personnel can directly confirm the region of treating the scanning at two-dimensional code place through visualing to this region is roughly aimed at with two-dimensional code scanner 4 manually. And then starting the two-dimension code scanner 4, calling a scheme set comprising at least two different two-dimension code analysis schemes in a two-dimension code analysis scheme knowledge base based on bag body form simulation information of the infusion bag 1 determined by the volume relation between the infusion bag 1 used currently and the light-shading liquid medicine 5 in the infusion bag 1, and initializing selection scores corresponding to each two-dimension code analysis scheme in the scheme set. The selection score at least relates to deformation feature labels of bag shape simulation information and/or processing capability features corresponding to each two-dimensional code analysis scheme.

The invisible two-dimensional code recognition system provided by the invention is particularly suitable for recognizing a two-dimensional code sleeved in a light-shielding bag loaded with a certain amount of liquid medicine and having a certain deformation amount, can quickly and accurately recognize in a mode of remarkably minimizing misjudgment probability and time consumption of recognition failure by judging the deformation state of a light-shielding object attached to the two-dimensional code to be recognized in advance and combining a cloud information interaction mode to analyze the applicability of a two-dimensional code recognition scheme and light-supplementing strength, and is also suitable for recognizing a two-dimensional code which is sleeved with a light-shielding bag outside the recognition and can be switched between two light transmission states;

the invisible two-dimensional code and the identification system provided by the invention have the advantages that the matching use relationship between the light-shielding bag and the scanning identification mode of the two-dimensional code scanner is arranged, the reusability of the light-shielding bag is ensured, the convenience for acquiring the two-dimensional code of the medicine on the light-shielding object is greatly improved, the extra unnecessary work burden of medical staff is reduced, the medical staff only needs to visually determine the area to be scanned and then roughly align the two-dimensional code scanner to the area, the area can be switched from the first light transmission state to the second light transmission state only in the short time of the alignment and scanning of the scanner, the medicine information corresponding to the two-dimensional code can be quickly and reliably identified in the short time, the area is restored to the semitransparent state which is favorable for the light-shielding treatment after the medical staff removes the scanner, and the medical staff does not need to manually cling to the inner bag body and the outer bag body in the whole scanning process, and also avoids the adverse effect of taking out the light-shielding object to expose the internal medicine to light for a long time.

Preferably, the volume relationship between the currently used infusion bag 1 and the light-shielding liquid medicine 5 in the infusion bag 1 is determined based on the volume information of the infusion bag 1 and the volume information of the light-shielding liquid medicine 5 in the infusion bag 1, which are manually input by the user, when the two-dimensional code scanner 4 is started. After the two-dimensional code scanner 4 is started, the medical staff can directly visually observe the maximum volume mark and the volume scale on the infusion bag 1, determine the volume information of the infusion bag 1 from the numerical value corresponding to the maximum volume mark, and determine the volume information of the light-shielding liquid medicine 5 from the volume scale corresponding to the liquid level of the liquid in the infusion bag 1. The volume relationship between the currently used infusion bag 1 and the light-shielding liquid medicine 5 in the infusion bag 1 is the fraction of the unreduced numerator denominator formed by the respective volume information of the infusion bag and the light-shielding liquid medicine. Preferably, the volume relationship at least includes at least one piece of bag shape simulation information corresponding thereto retrieved from a bag shape simulation library associated with the infusion bag 1. The bag shape simulation library stores bag shape simulation information in different volume relations in advance, and because different infusion bags 1 with certain volumes have basically the same shape when loaded with liquid medicines with the same volume, the deformation degree of the current bag can be obtained based on the simulation information stored in the bag shape simulation library in advance. Because the infusion bag 1 that the volume is equivalent to with it can not be chooseed for use to the volume of liquid medicine under the general condition, consequently do not consider that infusion bag 1 excessively deforms and causes the unsmooth degree of infusion bag 1 both sides fold too big, the unable condition of discerning of two-dimensional code, even if medical personnel also can judge by oneself under this condition and need its manual drawing level light-resistant bag 3 and infusion bag 1 to carry out the scanning after to the certain degree. The bag shape simulation information is used for describing the bag deformation degree of the infusion bag 1 loaded with the light-shielding liquid medicine 5 on the basis of the infusion bag 1 not loaded with the light-shielding liquid medicine 5.

According to a preferred embodiment, the deformation characteristic label of the bag shape simulation information and the ambient light intensity related to the first area are determined in the first area at the first time T. The first time T is the time when the medical staff inputs the volume information of the infusion bag 1 and the volume information of the light-shielding liquid medicine 5 in the infusion bag 1, and the identification system retrieves the deformation characteristic label of the bag shape simulation information. The first area is a position area with the current position of the two-dimensional code scanner 4 as a center and a preset parameter as a radius, or a position area with the current position of the two-dimensional code scanner 4 as a center and a preset parameter as a length, a width and a height. The first area is a position area which is close to the current two-dimensional code scanner 4 and is closest to the illumination environment where the current two-dimensional code label is located, and the division mode of the first area can be adjusted in advance through an identification system. The ambient light intensity related to the first area is an average value of a plurality of ambient light intensities obtained within a time range of (T-T, T) of the photosensitive element currently set on the two-dimensional code scanner 4. The ambient light intensity related to the first area may be the ambient light intensity obtained by the photosensitive element arranged on the current two-dimensional code scanner 4 at the first time T.

According to a preferred embodiment, historical scan data corresponding to the deformation feature tag in the cloud historical scan database is called to obtain one or more of a first prediction selection score, a second prediction selection score and/or a third prediction selection score corresponding to each two-dimensional code resolution scheme. Preferably, a plurality of historical scan data of a plurality of different two-dimensional code scanners 4 are stored in the cloud historical scan database in advance, and the plurality of historical scan data are classified at least according to the deformation feature labels. The plurality of historical scan data is classified according to at least one or a combination of deformation characteristic labels, ambient light intensity and acquisition time of the plurality of historical scan data. Each two-dimension code scanner 4 is connected with the cloud historical scanning database in a wireless connection mode, and data exchange between each two-dimension code scanner 4 and the cloud historical scanning database is achieved. Each two-dimensional code scanner 4 has its own number, and after completing a single successful scan, sends a plurality of pieces of information acquired during the scan, such as a deformation feature tag, ambient light intensity, acquisition time, and the like, to the cloud history scanning database in a manner of being bound to the scanner number.

According to a preferred embodiment, the first prediction selection score, the second prediction selection score and/or the third prediction selection score are weighted and summed according to a preset weight distribution coefficient, so as to initialize the selection score corresponding to each two-dimensional code parsing scheme. Preferably, the weight distribution coefficient for initializing the selection score is a coefficient preset to make the different retrieval conditions comparable and additive based on the corresponding different processing capability characteristics of each two-dimensional code parsing scheme under the retrieval conditions of different historical scan data. The processing capability features include at least one or more of deformation feature tags, ambient light intensity, acquisition time, and number of historical scan data. The number of the historical scan data is the total number of the historical scan data which meet the calling condition and are obtained under different calling conditions. Particularly, under the condition that the quantity of the historical scanning data is too small, the total sampling times are too small, so that the sampling result does not have representativeness, namely, the plurality of historical scanning data/prediction selection scores obtained under the calling condition do not have representativeness, and therefore the initialization of the selection scores is carried out after the plurality of historical scanning data/prediction selection scores obtained under the calling condition are removed, and the problem that the evaluation result is prone to be over-deviated due to too low quantity of the historical scanning data samples is solved.

According to a preferred embodiment, a deformation characteristic label of bag shape simulation information and an ambient light intensity related to a first area are determined in the first area at a first time T, and first historical scanning data corresponding to the deformation characteristic label in a cloud historical scanning database are retrieved, wherein the first historical scanning data at least comprise a plurality of historical scanning data which are acquired within a time range of (T-T, T) and have the same deformation characteristic label and at least one two-dimensional code resolution scheme. And obtaining a first prediction selection score corresponding to each two-dimensional code analysis scheme. And the different processing capability characteristics corresponding to each two-dimensional code analysis scheme under the calling condition corresponding to the first historical scanning data at least comprise a deformation characteristic label, acquisition time and the quantity of the historical scanning data. For example, when the number of the historical scan data is greater than the preset number range, the two-dimensional code parsing scheme has a weight distribution coefficient that the sum of 1 (valid deformation feature tag) +0.5 (valid acquisition time) +1 (valid historical scan data number) is 2.5 under the condition of invoking corresponding to the first historical scan data.

Preferably, second historical scan data corresponding to the deformation feature tag in a cloud historical scan database is retrieved, and the second historical scan data at least comprises a plurality of historical scan data which are acquired in a time range of (T-T, T) and in a first area and have the same deformation feature tag and at least one two-dimensional code analysis scheme, so as to obtain a second prediction selection score corresponding to each two-dimensional code analysis scheme. And the different processing capability characteristics corresponding to each two-dimensional code analysis scheme under the calling condition corresponding to the second historical scanning data at least comprise a deformation characteristic label, adjacent areas, acquisition time and the quantity of the historical scanning data. For example, when the number of the historical scan data is greater than the preset number range, the two-dimensional code parsing scheme has a weight distribution coefficient, under the condition of invoking corresponding to the second historical scan data, where the total sum of 1 (valid deformation feature tag) +0.5 (valid acquisition time) +0.5 (valid adjacent region) +1 (valid historical scan data number) is 3.

Preferably, third historical scanning data corresponding to the deformation feature tags in the cloud historical scanning database is called, and the third historical scanning data is multiple historical scanning data with the same deformation feature tags, the same ambient light intensity and at least one two-dimensional code analysis scheme, so that a third prediction selection score corresponding to each two-dimensional code analysis scheme is obtained. And the different processing capability characteristics corresponding to each two-dimensional code analysis scheme under the calling condition corresponding to the third historical scanning data at least comprise a deformation characteristic label, the ambient light intensity and the quantity of the historical scanning data. For example, when the number of the historical scan data is greater than the preset number range of the parent, the two-dimensional code parsing scheme has a weight distribution coefficient that the sum of 1 (effective deformation feature label) +1.5 (effective ambient light intensity) +1 (effective historical scan data number) is 3.5 under the invoking condition corresponding to the third historical scan data.

Preferably, for example, a two-dimensional code parsing scheme has a weight assignment coefficient of x under the condition of the retrieval corresponding to the first historical scan data, and a two-dimensional code is decodedThe analysis scheme has a weight distribution coefficient of Y under the calling condition corresponding to the second historical scanning data, the two-dimensional code analysis scheme has a weight distribution coefficient of Z under the calling condition corresponding to the third historical scanning data, and the first prediction selection score of X, the second prediction selection score of Y and the third prediction selection score of Z are obtained through calculation, so that the selection score ξ corresponding to the two-dimensional code analysis scheme is obtained₁Can pass through

And (4) calculating.

According to a preferred embodiment, the driving voltage output terminal 11 of the two-dimensional code scanner 4 is electrically connected to at least one of the conductive substrate layers 9 to form a closed loop. When the two-dimensional code scanner 4 is aligned with the area of the infusion two-dimensional code label 2, the output driving voltage parameter can be adjusted through the voltage control command generated by the two-dimensional code scanner 4.

According to a preferred embodiment, when the driving voltage parameter applied by the two-dimensional code scanner 4 to at least one of the conductive substrate layers 9 is controlled to change, the dimming layer 10 switches from the first light transmission state to the second light transmission state in a manner that light rays propagating inside the dimming layer are refracted at different angles, so as to realize the light guiding function thereof, the scanning condition of the two-dimensional code scanner 4 is satisfied, so that the infusion two-dimensional code label 2 located inside the label area can be identified by the two-dimensional code scanner 4 located outside the label area in a short-time visible manner, when the identification process is completed and the electrical connection relationship between the driving voltage output end 11 and at least one of the conductive substrate layers 9 is disconnected, the dimming layer 10 switches from the second light transmission state to the first light transmission state in a manner that light rays propagating inside the dimming layer are refracted at different angles, so as to realize the light selective passing function thereof, the scanning condition of the two-dimensional code scanner 4 is insufficient, so that the infusion two-dimensional code label 2 is restored to the invisible state which is difficult to be recognized by the two-dimensional code scanner 4.

According to a preferred embodiment, when the two-dimensional code scanner 4 is started, the current ambient light intensity is obtained through the camera of the two-dimensional code scanner 4. And comparing the ambient illumination intensity with a preset illumination intensity, and dynamically controlling the main light supplement intensity of the light supplement light source in the two-dimensional code scanner 4. When a code scanning instruction is received, a two-dimensional code image corresponding to the infusion two-dimensional code label 2 to be analyzed is obtained through a camera of the two-dimensional code scanner 4. And performing rapid scanning identification in a mode of dynamically correcting the main fill-in light intensity of the fill-in light source in a small amplitude. Preferably, because required light supplement intensity is preliminarily predicted before scanning and identifying, the preset illumination intensity is set based on the illumination intensity required when the two-dimensional code coated with the light-shielding bag on the outer portion is scanned and identified, so that the light supplement intensity can be preliminarily and greatly adjusted, the main light supplement intensity can be corrected in a small range during actual scanning, the variation range required by the illumination intensity is small, the variation time is short, and the identification time duration during scanning of the two-dimensional code is not influenced. When the two-dimensional code scanner 4 cannot complete two-dimensional code image information identification within a preset first time length, based on the selection score corresponding to each two-dimensional code analysis scheme in the scheme set, a two-dimensional code analysis scheme with the highest selection score is called from the scheme set, and scanning identification is performed again at the cost of selecting the processing capability feature of one of the two-dimensional code analysis schemes with the lower selection score. The method is characterized in that each two-dimensional code analysis scheme has respective processing capability characteristics at the expense of selecting the processing capability characteristics of one of the two-dimensional code analysis schemes with lower scores, for example, the scanning recognition speed is very high or the scanning speed is relatively slow but the scanning recognition success rate is high or the processing capability of the two-dimensional code under the condition of distortion or bending is strong or the recognition reliability of the two-dimensional code with insufficient definition is high. When the two-dimension code scanner 4 cannot complete the two-dimension code image information identification within the preset second time length, reevaluating and determining the selection score corresponding to each two-dimension code analysis scheme in the scheme set, calling one of the two-dimension code analysis schemes with lower scores from the scheme set, reacquiring the two-dimension code image corresponding to the infusion two-dimension code label 2 to be analyzed, and performing rescanning identification to obtain a scanning result.

According to a preferred embodiment, the two-dimensional code analysis scheme at least comprises one or more of an aspect ratio tolerance optimization analysis scheme of a stub point search algorithm, a 151 stub point identification analysis scheme, a diagonal 11311 filtering rule analysis scheme, an analysis scheme based on logistic regression, an analysis scheme of an overall configuration skip strategy, a perspective transformation distortion-resistant analysis scheme, a quadratic mapping distortion-resistant analysis scheme and an image binarization analysis scheme. The image binarization analysis scheme is to set the gray value of a pixel point on an image to be 0 or 255, namely, the whole image presents an obvious visual effect only including black and white. Before the code scanning algorithm is decoded, binarization calculation is carried out, the data volume in the image can be greatly reduced through the binarization calculation of the image, the interference of other information under the conditions of image blurring, low color contrast, over-strong/over-weak light, image contamination and the like is weakened, and the detection and the identification are facilitated. The quadratic mapping distortion-resistant analysis scheme establishes a mapping relation by using a quadratic function, and for the Bit Matrix obtained after sampling, for the points in a rectangular region at the middle part, the value of the middle point is changed by adopting a strategy of inversion or random value taking of each point, so that the error-tolerant identification capability and the distortion-resistant capability can be excellent through the check of an error-tolerant boundary. The analysis scheme for integrally configuring the skipping strategy modifies the skipping calculation line number into a configurable item, obtains the most appropriate skipping strategy through online AB gray level test, and integrally configures the skipping strategy, so that the recognition rate is high.

According to a preferred embodiment, the identification system is further configured to perform the steps of: when a code scanning instruction is received to perform quick scanning identification, a first image of a transfusion two-dimensional code label 2 and a first environment illumination intensity during shooting of the first image are determined, when the two-dimensional code scanner 4 cannot complete two-dimensional code image information identification within a preset first time length or a preset second time length, a second image of the transfusion two-dimensional code label 2 and a second environment illumination intensity during shooting of the second image are determined, brightness analysis is respectively performed on the first image and the second image to obtain a first brightness value corresponding to the first image and a second brightness value corresponding to the second image, and when a deviation between the first brightness value and the first environment illumination intensity and/or a deviation between the second brightness value and the second environment illumination intensity exceed a preset system allowable range, a correction of the two-dimensional code scanner 4 under the first environment illumination intensity is determined based on the deviation between the first brightness value and the first environment illumination intensity The parameters and/or the deviation between the second brightness value and the second environment illumination intensity determine the correction parameters of the two-dimensional code scanner 4 under the second environment illumination intensity, so as to optimize the measurement distortion error of the imaging optical devices of different two-dimensional code scanners 4 when identifying the two-dimensional code which is externally sleeved with the light-shielding bag 3 and the light-shielding bag 3 can be switched between the first light transmission state and the second light transmission state.

An invisible two-dimensional code is attached to an infusion bag 1 in a mode of an infusion two-dimensional code label 2, the infusion bag 1 is used for bearing a light-shielding liquid medicine 5 and the infusion two-dimensional code label 2 and is sleeved in a light-shielding bag 3, the light-shielding bag 3 is used for performing light-shielding treatment on the interior of the bag and enabling the infusion two-dimensional code label 2 to be in the invisible state, the infusion two-dimensional code label 2 can be identified by a two-dimensional code scanner 4 under a scanning condition, at least part of a bag body on the light-shielding bag 3 is of a multilayer structure, the multilayer structure at least comprises two conductive substrate layers 9 and a dimming layer 10 arranged between the two conductive substrate layers 9, the dimming layer 10 can be used for switching a first light transmission state and a second light transmission state of the multilayer structure, wherein a driving voltage output end 11 of the two-dimensional code scanner 4 is electrically connected with at least one conductive substrate layer 9 to form a closed loop, when the two-dimensional code scanner 4 aligns with the infusion two-dimensional code label 2 area, the driving voltage parameter output by the two-dimensional code scanner 4 can be adjusted through the voltage control instruction generated by the two-dimensional code scanner 4, and when the driving voltage parameter applied by the two-dimensional code scanner 4 to at least one conductive substrate layer 9 is controlled to change, the dimming layer 10 is switched from the first light transmission state to the second light transmission state in a manner that light rays transmitted inside the dimming layer are refracted at different angles, so that the light guiding function of the dimming layer is realized, the scanning condition of the two-dimensional code scanner 4 is met, so that the infusion two-dimensional code label 2 located inside the label area can be identified by the two-dimensional code scanner 4 located outside the label area in a short-time visible manner under the scanning condition, when the identification process is completed and the electrical connection relationship between the driving voltage output end 11 and at least one conductive substrate layer 9 is disconnected, the light adjusting layer 10 is switched from the second light transmission state to the first light transmission state in a manner that light rays propagating inside the light adjusting layer are refracted at different angles, so that the light selective passing function is realized, the scanning condition of the two-dimensional code scanner 4 is insufficient, and the infusion two-dimensional code label 2 is restored to the invisible state which is difficult to be recognized by the two-dimensional code scanner 4.

Preferably, the light modulation layer 10 is a PDLC film (Polymer Dispersed Liquid Crystal, PDLC for short). The PDLC can be used as a medium for light regulation, and the PDLC has the characteristic of birefringence optics, so that the light refractive index in the PDLC is changed by changing the applied electric field intensity, and the light regulation can be realized. PDLC is also called polymer dispersed liquid crystal, and is formed by dispersing liquid crystal in an organic solid polymer matrix in micro-sized small droplets. Since the optical axis of the small droplets composed of liquid crystal molecules is in a free orientation, the refractive index of the liquid crystal molecules is not matched with that of the matrix, and light is strongly scattered by the droplets while passing through the matrix to assume an opaque milky white state or a translucent state. The application of an electric field adjusts the optical axis orientation of the liquid crystal droplets, which when index matched, assume a transparent state, and upon removal of the electric field, the liquid crystal droplets revert to their original astigmatic state. The liquid crystal droplets are uniformly distributed in the polymer material, and the size of the liquid crystal droplets can be larger than the wavelength of visible light or smaller than the wavelength of visible light. The photoelectric effect of each liquid crystal molecule is determined by the polarization direction, optical refractive index and dielectric constant of the incident light. Specifically, a polymer matrix in which nematic liquid crystal molecule microparticles are arranged in respective micro liquid crystal droplets is located between the rear substrate and the front substrate. When no voltage is applied between the first and second drive electrodes, the incident light is totally scattered due to the difference in refractive index between the micro liquid crystal droplets and the polymer matrix, thereby achieving a light scattering state. That is, the liquid crystal molecule particles in the micro liquid crystal droplet are randomly arranged before the electric field is formed between the first driving electrode and the second driving electrode. Thus, incident light is simultaneously scattered through the polymer matrix to assume a light scattering state. When the power supply unit applies voltage between the first driving electrode and the second driving electrode, the long axes of the liquid crystal molecule particles in the micro liquid crystal droplets are arranged in parallel with the direction of the electric field E. So that incident light is transmitted through the polymer matrix to achieve the light transmissive state.

According to a preferred embodiment, the transparent substrate layer comprises at least one or several of modified polyethylene terephthalate, modified polymethyl methacrylate and modified polystyrene.

According to a preferred embodiment, the light-shielding bag 3 has a plurality of strip-shaped layers adjacent to each other in an imaginary designated direction parallel to the surface of the bag body, each strip-shaped layer is of the multilayer structure, wherein the driving voltage output end 11 of the two-dimensional code scanner 4 is electrically connected with at least one conductive substrate layer 9 to form a closed loop, at least one strip-shaped layer corresponding to the region of the infusion two-dimensional code label 2 is determined based on the position of the region of the infusion two-dimensional code label 2, when the two-dimensional code scanner 4 aligns with the region of the infusion two-dimensional code label 2, the internal part of at least one strip-shaped layer corresponding to the region of the infusion two-dimensional code label 2 is driven to be visible and the rest strip-shaped layers are kept in an invisible state by controlling the parameter change of the driving voltage applied to at least one conductive substrate layer 9 by the two-dimensional code scanner 4, so that the two-dimensional code can pass through the light-shielding bag 3 in a selective region light transmission Identified by the code scanner 4.

As shown in fig. 2, according to a preferred embodiment, a first electrode sheet 6 and a second electrode sheet 7 adjacent to each other are respectively fixed on an edge portion of the light-shielding bag 3 in a manner of partially extending out of the light-shielding bag 3, one end of the first electrode sheet 6 and one end of the second electrode sheet 7 are respectively connected with at least one conductive substrate layer 9, a connection lead led out along one end of the scanner housing is arranged on the two-dimensional code scanner 4, and two ends of the connection lead are respectively connected with a driving voltage output end 11 and a clamping member 8 located inside the scanner housing, so that a closed loop is formed between the driving voltage output end 11 and at least one conductive substrate layer 9 by means of simultaneously attaching the clamping member 8 on the first electrode sheet 6 and the second electrode sheet 7. Preferably, the two-dimensional code scanner 4 at least comprises a light emitter arranged on the body thereof, wherein light emitted by the light emitter is reflected back to the two-dimensional code scanner 4 through the two-dimensional code label 2 for transfusion, and is received by a photoelectric converter on the two-dimensional code scanner 4, so that the photoelectric converter generates an electric signal, the electric signal is amplified to generate an analog voltage signal, the analog voltage signal is in direct proportion to the light which irradiates on the two-dimensional code label 2 for transfusion and is reflected back, the analog voltage signal after being filtered and shaped is output to form a square wave signal corresponding to the analog voltage signal, and the square wave signal is decoded and interpreted as a digital signal, so that medicine information corresponding to the two-dimensional code label 2 for transfusion can be obtained through the obtained digital signal conversion.

According to a preferred embodiment, the two-dimensional code scanner 4 at least includes a scanning window disposed on the body thereof, and a photoelectric converter, an amplifying circuit connected to the photoelectric converter, a filter shaping circuit connected to the amplifying circuit, and a decoder connected to the filter shaping circuit, which are disposed inside the body, wherein the photoelectric converter is located on the body of the two-dimensional code scanner 4 at a position adapted to the scanning window.

According to a preferred embodiment, the light emitter comprises at least one or several of a laser emitter, a red light emitter, an infrared fluorescent lamp.

According to a preferred embodiment, a first ITO electrode layer, an optical refraction adjustable layer, and a second ITO electrode layer are respectively disposed on the light adjusting layer 10 according to a vector direction from incident light to emergent light, wherein the first ITO electrode layer and the second ITO electrode layer are both transparent electrode layers and are respectively connected to a driving voltage applied by the two-dimensional code scanner 4.

According to a preferred embodiment, the two-dimensional code scanner 4 at least includes a wireless transmitting circuit, and the wireless transmitting circuit is provided with a first wireless charging module, a second wireless charging module and a third wireless charging module, wherein the first wireless charging module is connected to the second wireless charging module and is configured to output power to the second wireless charging module, the second wireless charging module is connected to the third wireless charging module and is configured to output charging current, and the third wireless charging module is configured to perform status prompt on a charging status of the rechargeable battery.

According to a preferred embodiment, the invisible two-dimensional code and identification system provided by the invention at least comprises the following steps:

s1: printing out the infusion two-dimension code label 2 in a computer, and attaching the infusion two-dimension code label 2 on the infusion bag 1. The information corresponding to the two-dimensional code of the infusion two-dimensional code label 2 at least comprises information such as a patient bed number, a name, a medicine name, administration concentration, a dosage, a method, administration time and the like.

S2: in use, the lightproof drug is firstly extracted from the lightproof brown glass bottle by using a sterile syringe and injected into the infusion bag 1.

S3: the transfusion bag 1 is immediately packaged by the light-shielding bag 3 after the transfusion two-dimension code label 2 is pasted, so that a transfusion environment which is beneficial to isolating medicines from light rays is formed.

S4: a two-dimensional code scanner 4 is prepared which is dedicated to scanning the infusion two-dimensional code label 2.

S5: before infusion, the two-dimension code scanner 4 is used for scanning the two-dimension code and the patient wrist strap two-dimension code to scan the code and check, and after scanning is completed, infusion is performed.

It should be noted that the above-mentioned embodiments are exemplary, and that those skilled in the art, having benefit of the present disclosure, may devise various arrangements that are within the scope of the present disclosure and that fall within the scope of the invention. It should be understood by those skilled in the art that the present specification and figures are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents.

Claims

1. An invisible two-dimensional code recognition system at least comprises a light-proof object (1), an infusion two-dimensional code label (2) attached to the light-proof object (1) and a two-dimensional code scanner (4), wherein the inside of the light-proof object (1) is used for bearing flowing fluid (5),

the identification system is configured to determine a volumetric relationship between the light-shielding object (1) currently in use and a fluid (5) flowing within the light-shielding object (1) based on volume information of the light-shielding object (1) and volume information of the fluid (5) flowing within the light-shielding object (1) manually input by a user when the two-dimensional code scanner (4) is started, thereby identifying the transfusion two-dimensional code label (2) under the volume relation through the two-dimensional code scanner (4), the volume relation at least comprises at least one bag shape simulation information corresponding to the volume relation, which is extracted from a bag shape simulation library related to the light-shielding object (1), the bag shape simulation information can be used to describe the degree of bag deformation of the light-shielding object (1) on which the fluid (5) is loaded, on the basis of the light-shielding object (1) on which the fluid (5) is not loaded.

2. The identification system according to claim 1, wherein the identification system at least comprises a light-shielding bag (3), the light-shielding object (1) is sleeved in the light-shielding bag (3), the light-shielding bag (3) is used for shielding the interior of the light-shielding object and enabling the infusion two-dimensional code label (2) to be in a difficult-to-identify state, the two-dimensional code scanner (4) can identify the infusion two-dimensional code label (2) under a scanning condition, and the process of identifying the area of the infusion two-dimensional code label (2) by the two-dimensional code scanner (4) under the scanning condition in the identification system at least comprises one or more of the following steps:

when the two-dimension code scanner (4) is started, the identification system acquires the current ambient illumination intensity through a camera of the two-dimension code scanner (4), compares the ambient illumination intensity with a preset illumination intensity, and dynamically controls the main supplementary illumination intensity of a supplementary illumination light source in the two-dimension code scanner (4);

when a code scanning instruction is received, a two-dimensional code image corresponding to the infusion two-dimensional code label (2) to be analyzed is obtained through a camera of the two-dimensional code scanner (4), and the identification system performs rapid scanning identification in a mode of dynamically correcting the main supplementary lighting intensity of the supplementary lighting light source in a small amplitude;

when the two-dimensional code scanner (4) cannot complete two-dimensional code image information identification within a preset first time length, the identification system calls a two-dimensional code analysis scheme with the highest selection score from the scheme set based on the selection score corresponding to each two-dimensional code analysis scheme in the scheme set, and re-scanning identification is carried out at the cost of selecting the processing capability feature of one of the two-dimensional code analysis schemes with the lower selection score;

when the two-dimension code scanner (4) cannot complete the two-dimension code image information identification within a preset second time length, the identification system reevaluates and determines the selection score corresponding to each two-dimension code analysis scheme in the scheme set, one of the two-dimension code analysis schemes with lower scores is called from the scheme set, the two-dimension code image corresponding to the infusion two-dimension code label (2) to be analyzed is obtained again, scanning identification is carried out again, and a scanning result is obtained.

3. The identification system according to one of the preceding claims, wherein the process of identifying the area of the infusion two-dimensional code label (2) by the two-dimensional code scanner (4) under scanning conditions comprises at least one or several of the following steps:

when the two-dimensional code scanner (4) is started, the identification system calls a scheme set comprising at least two different two-dimensional code analysis schemes in a two-dimensional code analysis scheme knowledge base based on bag body form simulation information of the light-proof object (1) determined by the volume relation between the light-proof object (1) and the fluid (5) flowing in the light-proof object (1), wherein the volume relation is used at present, and the selection score corresponding to each two-dimensional code analysis scheme in the scheme set is initialized, and the selection score at least relates to a deformation feature label of the bag body form simulation information and/or a processing capability feature corresponding to each two-dimensional code analysis scheme.

4. An identification system as claimed in any preceding claim, wherein the initialisation process of the selection score for each two-dimensional code parsing scheme in the set of schemes in the identification system comprises at least one or more of the following steps:

the identification system determines a deformation characteristic label of bag shape simulation information and the ambient illumination intensity related to the first area in the first area at a first moment T, and calls historical scanning data corresponding to the deformation characteristic label in a cloud historical scanning database to obtain one or more of a first prediction selection score, a second prediction selection score and/or a third prediction selection score corresponding to each two-dimensional code analysis scheme;

and the identification system carries out weighted summation on the first prediction selection score, the second prediction selection score and/or the third prediction selection score according to a preset weight distribution coefficient so as to initialize the selection score corresponding to each two-dimensional code analysis scheme.

5. An identification system as claimed in any preceding claim, wherein the initialisation process of the selection score for each two-dimensional code parsing scheme in the set of schemes in the identification system comprises at least one or more of the following steps:

the identification system determines a deformation feature tag of bag shape simulation information and the ambient illumination intensity related to the first area in the first area at a first moment T, and calls first historical scanning data corresponding to the deformation feature tag in a cloud historical scanning database, wherein the first historical scanning data at least comprises a plurality of historical scanning data which are acquired within a time range of (T-T, T) and have the same deformation feature tag and at least one two-dimensional code analysis scheme, so as to obtain a first prediction selection score corresponding to each two-dimensional code analysis scheme;

the identification system calls second historical scanning data corresponding to the deformation feature tags in a cloud historical scanning database, wherein the second historical scanning data at least comprises a plurality of historical scanning data which are acquired in a time range of (T-T, T) and in a first area and have the same deformation feature tags and at least one two-dimensional code analysis scheme, so that a second prediction selection score corresponding to each two-dimensional code analysis scheme is obtained;

the identification system calls third history scanning data corresponding to the deformation characteristic labels in a cloud history scanning database, wherein the third history scanning data are a plurality of history scanning data with the same deformation characteristic labels, the same ambient light intensity and at least one two-dimensional code analysis scheme, and a third prediction selection score corresponding to each two-dimensional code analysis scheme is obtained.

6. The identification system of any one of the preceding claims, wherein the weighting coefficients used to initialize the selection scores are coefficients that are predetermined to provide comparability and additivity between different retrieval conditions based on different processing capability characteristics corresponding to each two-dimensional code parsing scheme under different retrieval conditions of the historical scan data, the processing capability characteristics including at least one or more of distortion characteristic labels, ambient light intensity, retrieval time, and number of historical scan data.

7. An identification system as claimed in any preceding claim, wherein the identification system is further configured to perform the steps of:

when a code scanning instruction is received to carry out quick scanning identification, a first image of the transfusion two-dimensional code label (2) and a first environment illumination intensity when the first image is shot are determined,

when the two-dimension code scanner (4) cannot finish the information identification of the two-dimension code image within a preset first time length or a preset second time length, determining a second image related to the transfusion two-dimension code label (2) and a second ambient light intensity when the second image is shot,

respectively carrying out brightness analysis on the first image and the second image to obtain a first brightness value corresponding to the first image and a second brightness value corresponding to the second image, wherein when the deviation between the first brightness value and the first environment illumination intensity and/or the deviation between the second brightness value and the second environment illumination intensity exceeds a preset system tolerance range, a correction parameter of the two-dimensional code scanner (4) under the first environment illumination intensity is determined based on the deviation between the first brightness value and the first environment illumination intensity, and/or a correction parameter of the two-dimensional code scanner (4) under the second environment illumination intensity is determined based on the deviation between the second brightness value and the second environment illumination intensity, so that the two-dimensional code which is formed by the different two-dimensional code scanners (4) when identifying the two-dimensional code which is externally sleeved with the light-avoiding bag (3) and can be switched between the first light transmission state and the second light transmission state is formed by the light-avoiding bag (3) Like the measurement distortion error of the optics.

8. Identification system according to one of the preceding claims, characterized in that at least part of the bag body of the light-avoiding bag (3) is a multilayer structure comprising at least two electrically conductive substrate layers (9) and a light modulation layer (10) arranged between the two electrically conductive substrate layers (9), the light modulation layer (10) being capable of switching between a first light transmission state and a second light transmission state of the multilayer structure.

9. An invisible two-dimensional code, which is attached to a light-shielding object (1) in the form of an infusion two-dimensional code label (2), the inside of the light-shielding object (1) is used for carrying a flowing fluid (5), the infusion two-dimensional code label (2) can be identified by a two-dimensional code scanner (4) under scanning conditions, characterized in that the two-dimensional code is provided with an identification system according to one of the preceding claims, at least part of the bag body on the light-shielding bag (3) is of a multilayer structure, the multilayer structure at least comprises two conductive substrate layers (9) and a light modulation layer (10) arranged between the two conductive substrate layers (9), the light modulation layer (10) can be used for switching between a first light transmission state and a second light transmission state of the multilayer structure, wherein,

a driving voltage output end (11) of the two-dimensional code scanner (4) is electrically connected with at least one conductive substrate layer (9) to form a closed loop, when the two-dimensional code scanner (4) is aligned with the infusion two-dimensional code label (2) area, the output driving voltage parameter can be adjusted through a voltage control instruction generated by the two-dimensional code scanner (4), and,

when the driving voltage parameter applied to at least one conductive substrate layer (9) by the two-dimensional code scanner (4) is controlled to change, the light modulation layer (10) is switched from the first light transmission state to the second light transmission state in a mode that light rays propagating inside the light modulation layer are refracted at different angles, so that the light guide function of the light modulation layer is realized, the scanning condition of the two-dimensional code scanner (4) is met, and therefore the transfusion two-dimensional code label (2) positioned inside the label area can be identified by the two-dimensional code scanner (4) positioned outside the label area in a short-time visible mode,

when the identification process is completed and the electrical connection relation between the driving voltage output end (11) and at least one conductive substrate layer (9) is disconnected, the light modulation layer (10) is switched from the second light transmission state to the first light transmission state in a mode that light rays transmitted inside the light modulation layer are refracted at different angles, so that the light selective passing function is realized, the scanning condition of the two-dimensional code scanner (4) is insufficient, and the infusion two-dimensional code label (2) is recovered to a difficult-to-identify state which is difficult to identify by the two-dimensional code scanner (4).

10. The two-dimensional code according to claim 9, wherein said light-shielding bag (3) has a plurality of strip-like layers adjacent to each other in an imaginary designated direction parallel to the surface of the bag body, each strip-like layer being said multilayer structure, wherein,

a driving voltage output end (11) of the two-dimensional code scanner (4) is electrically connected with at least one conductive substrate layer (9) to form a closed loop, at least one strip-shaped layer corresponding to the infusion two-dimensional code label (2) is determined according to the position of the infusion two-dimensional code label (2), when the two-dimension code scanner (4) is aligned with the infusion two-dimension code label (2) area, the driving voltage parameter applied to at least one conductive substrate layer (9) by the two-dimension code scanner (4) is controlled to change, so that the interior of at least one strip-shaped layer corresponding to the infusion two-dimension code label (2) area is driven to be visible, and the rest strip-shaped layers are driven to be in an invisible state, the two-dimensional code can be identified by the two-dimensional code scanner (4) in such a way that the light-shielding bag (3) can transmit light selectively in regions, while the light-time and light-area of the flowing fluid (5) are minimized.