A cloth vehicle flow management method and system based on RFID

Abstract

The application provides a cloth vehicle flow management method and system based on RFID, relates to the technical field of cloth vehicle flow management, and comprises the following steps: obtaining cloth vehicle RFID tag information of a cloth vehicle; determining a cloth vehicle identification state of the cloth vehicle according to the cloth vehicle RFID tag information; obtaining a region identification state; judging whether the cloth vehicle identification state meets the requirements of the region identification state; if not, prompting according to preset illegal region movement prompt information; if yes, analyzing the cloth vehicle identification state and the region identification state to determine a rewritten identification state; rewriting the cloth vehicle RFID tag information according to the rewritten identification state, and obtaining a state retention time of the cloth vehicle; and monitoring the state of the cloth vehicle according to the state retention time. The application has the effects of reducing losses caused by lagging cloth vehicle flow data analysis and improving the standardization of cloth vehicle flow management.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of cloth car flow management, in particular to a cloth car flow management method and system based on RFID. BACKGROUND

[0002] Cloth car flow refers to the recycling and scheduling of automatic trolleys loaded with cloth between different processes in a printing and dyeing factory.

[0003] In related technologies, cloth car flow is usually realized based on RFID (radio frequency identification) technology, an RFID tag is installed on the cloth car, the information of the cloth car is written in the RFID tag, and a reader is arranged in different areas, after the cloth car moves to the area, the reader reads the information in the RFID tag on the cloth car and uploads it to the flow system for recording, and when the cloth appears abnormal in the future, the record is retrieved for tracing.

[0004] In the related technologies described above, during the cloth car flow process, if the cloth car is stranded for too long or the cloth car path is abnormal, it is easy to cause the cloth to be abnormal, and when it is determined that the cloth is abnormal, the loss of the cloth has already occurred when the cloth car flow data is traced, which leads to chaotic cloth car flow management and there is room for improvement. SUMMARY

[0005] In order to reduce the loss caused by the lag of cloth car flow data analysis and improve the standardization of cloth car flow management, the application provides a cloth car flow management method and system based on RFID.

[0006] In a first aspect, the application provides a cloth car flow management method based on RFID, which adopts the following technical scheme:

[0007] A cloth car flow management method based on RFID, comprising:

[0008] Obtaining cloth car RFID tag information of the cloth car;

[0009] Determining the cloth car identification state of the cloth car according to the cloth car RFID tag information;

[0010] Obtaining the area identification state;

[0011] Judging whether the cloth car identification state meets the requirements of the area identification state;

[0012] If not, a preset illegal area movement prompt information is prompted;

[0013] If yes, the cloth car identification state and the area identification state are analyzed to determine the rewritten identification state;

[0014] According to the rewriting identification state, the cloth car RFID tag information is rewritten, and the state holding time of the cloth car is obtained;

[0015] According to the state holding time, the state of the cloth car is monitored.

[0016] By adopting the above technical scheme, when it is determined that the cloth car identification state does not meet the requirements of the area identification state, the illegal area movement prompt information is prompted, so that the personnel can correct the cloth car movement area in time, and ensure that the cloth car moves in the correct process position; when it meets, the cloth car RFID tag information is rewritten according to the rewriting identification state, and the state of the cloth car is monitored according to the state holding time, so as to avoid the cloth car staying in an area, reduce the probability of cloth problems, reduce the loss caused by the lag of cloth car circulation data analysis, and further improve the standardization of cloth car circulation management.

[0017] Optionally, the step of obtaining the cloth car RFID tag information of the cloth car comprises:

[0018] Obtain the comprehensive interference index;

[0019] According to the comprehensive interference index and the preset interference level determination rule, the reading interference level is determined;

[0020] According to the reading interference level and the preset interference reading distance relationship, the target reading distance is determined;

[0021] According to the reading interference level and the preset interference additional loss relationship, the interference level loss is determined;

[0022] The target reading distance, the preset RFID working frequency and the preset constant term are analyzed to determine the target distance free space loss;

[0023] The target distance free space loss, the interference level loss, the preset minimum identifiable receiving power, the preset reader antenna gain and the preset tag antenna gain are analyzed to determine the actual reading power;

[0024] The cloth car is controlled to approach the preset reader at the target reading distance, and the reader is controlled to read the cloth car RFID tag information of the cloth car at the actual reading power.

[0025] According to the technical scheme, the target reading distance is determined according to the reading interference level and the interference reading distance relationship, the target distance free space loss is calculated according to the target reading distance, the RFID working frequency and a constant term, the interference level loss is determined according to the reading interference level and the interference additional loss relationship, the actual reading power is calculated according to the target distance free space loss, the interference level loss, the minimum identifiable receiving power, the reader antenna gain and the tag antenna gain, the vehicle is controlled to approach the preset reader at the target reading distance, and the reader is controlled to read the vehicle RFID tag information of the vehicle at the actual reading power, thereby improving the accuracy of reading the RFID tag information.

[0026] Optionally, the step of obtaining the comprehensive interference index comprises:

[0027] Obtaining signal reflection loss;

[0028] Determining a physical shielding coefficient according to the signal reflection loss and a preset physical shielding intensity quantification rule;

[0029] Obtaining peripheral electromagnetic field intensity;

[0030] Determining an electromagnetic interference coefficient according to the peripheral electromagnetic field intensity and a preset electromagnetic interference intensity quantification rule;

[0031] Analyzing the physical shielding coefficient, the electromagnetic interference coefficient and a preset interference weight coefficient to determine the comprehensive interference index.

[0032] According to the technical scheme, the physical shielding coefficient is determined according to the signal reflection loss and the physical shielding intensity quantification rule, the electromagnetic interference coefficient is determined according to the peripheral electromagnetic field intensity and the electromagnetic interference intensity quantification rule, the comprehensive interference index is obtained by comprehensively considering the physical shielding coefficient and the electromagnetic interference coefficient which affect the reading accuracy, and the accuracy of determining the comprehensive interference index is improved.

[0033] Optionally, the step of analyzing the target distance free space loss, the interference level loss, the preset minimum identifiable receiving power, the preset reader antenna gain and the preset tag antenna gain to determine the actual reading power comprises:

[0034] Analyzing the target distance free space loss, the interference level loss, the minimum identifiable receiving power, the reader antenna gain and the tag antenna gain to determine a basic reading power;

[0035] Determining an interference level power range according to the reading interference level and a preset interference level power relationship;

[0036] Analyzing the basic reading power and the interference level power range to determine the actual reading power.

[0037] By adopting the technical scheme, the target distance free space loss, interference level loss, minimum identifiable received power, reader antenna gain and tag antenna gain are used to calculate the basic reading power, and then the basic reading power is compared with the interference level power range, so that the actual reading power can accurately read the RFID tag information with the lowest power consumption, thereby improving the accuracy of the actual reading power.

[0038] Optionally, the step of monitoring the state of the cloth vehicle according to the state holding time comprises:

[0039] Obtaining a state holding threshold time of the cloth vehicle;

[0040] Judging whether the state holding time meets the requirement of the state holding threshold time;

[0041] If not, a preset stay timeout prompt information is prompted;

[0042] If yes, the state of the cloth vehicle is monitored according to the state holding time and the state holding threshold time.

[0043] By adopting the technical scheme, when it is determined that the state holding time does not meet the requirement of the state holding threshold time, the stay timeout prompt information is prompted; and when it meets the requirement, the state of the cloth vehicle is monitored according to the state holding time and the state holding threshold time, so that when the cloth vehicle stays for a long time, timely prompting is performed to prevent cloth damage caused by cloth vehicle failure, thereby avoiding cloth vehicle staying in one area, reducing the probability of cloth problems, reducing the loss caused by the lag of cloth vehicle turnover data analysis, and improving the standardization of cloth vehicle turnover management.

[0044] Optionally, the step of obtaining the state holding threshold time of the cloth vehicle comprises:

[0045] Analyzing the cloth vehicle RFID tag information, the area identification state and the preset cloth vehicle state time rule to determine a basic threshold time;

[0046] Obtaining an area average time consumption and a current business load based on the area identification state;

[0047] Analyzing the area average time consumption and the basic threshold time to determine a historical time correction coefficient;

[0048] Determining a load adjustment coefficient according to the current business load and a preset business load adjustment relationship;

[0049] Analyzing the basic threshold time, the historical time correction coefficient and the load adjustment coefficient to determine the state holding threshold time of the cloth vehicle.

[0050] By adopting the technical scheme, the base threshold time is determined according to the cloth car RFID tag information, the area identification state and the cloth car state time rule, the historical time correction coefficient is calculated according to the area average time consumption and the base threshold time, the load adjustment coefficient is determined according to the current business load and the business load adjustment relationship, the state maintenance threshold time is calculated according to the base threshold time, the historical time correction coefficient and the load adjustment coefficient, and the accuracy of the state maintenance threshold time is improved.

[0051] Optionally, the step of monitoring the cloth car according to the state maintenance time and the state maintenance threshold time comprises:

[0052] obtaining a health score of the cloth car;

[0053] determining whether the health score meets a preset health threshold requirement;

[0054] if yes, determining whether the state maintenance time exceeds the state maintenance threshold time;

[0055] if no, continuing to obtain the state maintenance time of the cloth car for cyclic determination;

[0056] if yes, prompting according to a preset stay overtime prompt information;

[0057] if no, correcting the state maintenance threshold time according to a preset damage correction time coefficient, and prompting according to the preset stay overtime prompt information when the state maintenance time exceeds the corrected state maintenance threshold time.

[0058] By adopting the technical scheme, when it is determined that the health score does not meet the health threshold requirement, the state maintenance threshold time is corrected according to the damage correction time coefficient, so that when the state maintenance time exceeds the corrected state maintenance threshold time, the stay overtime prompt information is prompted, so that when it is determined that the state of the cloth car is poor and the stay time is long, early warning is performed, the probability of cloth problems is reduced, the loss caused by the lag of cloth car circulation data analysis is reduced, and the standardization of cloth car circulation management is improved.

[0059] Optionally, the step of obtaining the health score of the cloth car comprises:

[0060] obtaining a number of rotations of a roller of the cloth car;

[0061] analyzing the number of rotations of the roller and a preset rotation life number to determine a roller wear rate;

[0062] analyzing the roller wear rate and a preset roller wear rule to determine a roller wear score;

[0063] obtaining a real-time vibration frequency of the cloth car;

[0064] analyzing the real-time vibration frequency, the preset rated frequency mean value and the preset maximum allowable deviation value to determine a vibration frequency deviation rate;

[0065] analyzing the vibration frequency deviation rate and a preset overload state rule to determine an overload state score;

[0066] analyzing the roller wear score and the overload state score to determine a health degree score of the truck.

[0067] By adopting the above technical solution, the roller wear rate is calculated based on the roller rotation number and the rotation life number, the roller wear score is analyzed based on the roller wear rate and the roller wear rule, the vibration frequency deviation rate is calculated based on the real-time vibration frequency, the rated frequency mean value and the maximum allowable deviation value, the overload state score is analyzed based on the vibration frequency deviation rate and the overload state rule, the health degree score is calculated based on the sum of the roller wear score and the overload state score, and the accuracy of the health degree score is improved.

[0068] In a second aspect, the application provides an RFID-based truck flow management system, which adopts the following technical solution:

[0069] An RFID-based truck flow management system, comprising:

[0070] An acquisition module, configured to acquire truck RFID tag information, area identification state and state retention time;

[0071] A memory, configured to store a program of the RFID-based truck flow management method according to any one of the above aspects;

[0072] A processor, the program in the memory can be loaded and executed by the processor and implement the RFID-based truck flow management method according to any one of the above aspects.

[0073] By adopting the above technical solution, the processor loads and executes the program of the RFID-based truck flow management method stored in the memory, controls the acquisition module to acquire a series of data related to the RFID-based truck flow management, and thereby.

[0074] In summary, the application has at least one of the following beneficial technical effects:

[0075] 1. By prompting according to illegal area moving prompt information when determining that the cloth car identification state does not meet the requirements of the area identification state, so that the personnel correct the cloth car moving area in time, and ensure that the cloth car moves in the correct process position; when it is met, the cloth car RFID tag information is rewritten according to the rewritten identification state, and the cloth car is monitored according to the state retention time, so as to avoid the cloth car staying in an area, reduce the probability of cloth problems, reduce the loss caused by the lag of cloth car circulation data analysis, and further improve the standardization of cloth car circulation management.

[0076] 2. By determining the target reading distance according to the reading interference level and the interference reading distance relationship, calculating the target distance free space loss according to the target reading distance, the RFID working frequency and the constant term, and determining the interference level loss according to the reading interference level and the interference additional loss relationship, so as to calculate the actual reading power according to the target distance free space loss, the interference level loss, the minimum identifiable receiving power, the reader antenna gain and the tag antenna gain, control the cloth car to approach the preset reader with the target reading distance, and control the reader to read the cloth car RFID tag information of the cloth car with the actual reading power, and further improve the accuracy of reading RFID tag information.

[0077] 3. By prompting according to the stay timeout prompt information when determining that the state retention time does not meet the requirements of the state retention threshold time; and when it is met, the cloth car is monitored according to the state retention time and the state retention threshold time, so as to timely remind when the cloth car stays for a long time, prevent cloth damage caused by cloth car failure, avoid the cloth car staying in an area, reduce the probability of cloth problems, reduce the loss caused by the lag of cloth car circulation data analysis, and further improve the standardization of cloth car circulation management. BRIEF DESCRIPTION OF DRAWINGS

[0078] Figure 1 It is a flowchart of a cloth car circulation management method based on RFID in the embodiment of the application.

[0079] Figure 2 It is a flowchart of the step of obtaining the cloth car RFID tag information of the cloth car in the embodiment of the application.

[0080] Figure 3 It is a flowchart of the step of obtaining the comprehensive interference index in the embodiment of the application.

[0081] Figure 4 It is a flowchart of the step of analyzing the target distance free space loss, the interference level loss, the preset minimum identifiable receiving power, the preset reader antenna gain and the preset tag antenna gain to determine the actual reading power in the embodiment of the application.

[0082] Figure 5 is a flowchart of the step of monitoring the state of the cloth car according to the state holding time in the embodiment of the application.

[0083] Figure 6 is a flowchart of the step of obtaining the state holding threshold time of the cloth car in the embodiment of the application.

[0084] Figure 7 is a flowchart of the step of monitoring the state of the cloth car according to the state holding time and the state holding threshold time in the embodiment of the application.

[0085] Figure 8 is a flowchart of the step of obtaining the health score of the cloth car in the embodiment of the application. DETAILED DESCRIPTION

[0086] In order to make the purpose, technical scheme and advantages of the application more clear, the application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and not to limit the application. Figures 1 to 8 DETAILED DESCRIPTION

[0087] With reference to Figure 1 , the embodiment of the application discloses a cloth car flow management method based on RFID, which comprises the following steps:

[0088] Step S100: obtaining cloth car RFID tag information of the cloth car.

[0089] Wherein, the cloth car RFID tag information refers to the core field in the RFID tag on the cloth car, for example, unique identification: cloth car number, current state: state code stored in the tag (such as 01 to be cleaned, 02 being cleaned, 03 to be distributed, etc.), cargo type: cloth type carried in the cloth car, etc. For specific acquisition method, refer to the step of Figure 2 .

[0090] Step S101: determining the cloth car identification state according to the cloth car RFID tag information.

[0091] Wherein, the cloth car identification state refers to the state code representing the state of the cloth car, which is identified by the processing terminal in the core field of the cloth car RFID tag information, for example, 10 to be cleaned.

[0092] Step S102: obtaining the area identification state.

[0093] Wherein, the area identification state refers to the state code of the cloth car state corresponding to the area, which is defined by the operator according to the specific function of the area, for example, the area at the entrance of the laundry room, which includes two cloth car states, one is 02 being cleaned, and the other is 03 to be distributed.

[0094] Step S103: judging whether the cloth vehicle identification state meets the requirement of the area identification state.

[0095] The requirement of the area identification state refers to that the state code of the cloth vehicle is in front of the state code corresponding to the area identification state, for example, the area state code is 02, and the state code of the cloth vehicle should be 01.

[0096] The processing terminal judges whether the state code corresponding to the cloth vehicle identification state is in front of the state code corresponding to the area identification state, so as to determine whether the cloth vehicle enters an illegal moving area.

[0097] Step S1031: if not, the preset illegal area moving prompt information is prompted.

[0098] If the processing terminal determines that the state code corresponding to the cloth vehicle identification state is not in front of the state code corresponding to the area identification state, it indicates that the area that the cloth vehicle needs to enter is not the current area, so the illegal area moving prompt information is prompted to make the operator adjust the cloth vehicle to the correct area in time, thereby reducing the probability of cloth damage and improving the standardization of cloth vehicle flow management.

[0099] The illegal area moving prompt information refers to the prompt information of the cloth vehicle entering an illegal area, which can be generated in combination of voice, text and light.

[0100] Step S1032: if yes, the cloth vehicle identification state and the area identification state are analyzed to determine the rewritten identification state.

[0101] If the processing terminal determines that the state code corresponding to the cloth vehicle identification state is in front of the state code corresponding to the area identification state, it indicates that the area that the cloth vehicle needs to enter is the current area, so the cloth vehicle identification state and the area identification state are analyzed to obtain the rewritten identification state, which provides data support for subsequent updating of the cloth vehicle RFID tag information.

[0102] The rewritten identification state refers to the state code of updating the cloth vehicle state, which is obtained by the processing terminal according to the state code corresponding to the cloth vehicle identification state in the state code corresponding to the area identification state, for example, the state code corresponding to the cloth vehicle identification state is 01 to be cleaned, and the state code corresponding to the area identification state should be selected as the rewritten identification state.

[0103] Step S104: rewriting the cloth vehicle RFID tag information according to the rewritten identification state, and obtaining the state holding time of the cloth vehicle.

[0104] Wherein, after determining the rewriting identification state, the processing terminal controls the reader to rewrite the state code in the cloth car RFID tag information to the state code corresponding to the rewriting identification state, on the one hand, it is convenient to trace back, on the other hand, it provides data support for subsequent analysis of whether the cloth car enters the illegal area, and detects the state holding time of the cloth car, which provides data support for subsequent determination of whether the cloth car stays in an area for a long time.

[0105] The state holding time refers to the time that the cloth car stays in an area. After the reader rewrites the state code of the cloth car, timing is performed until the state code of the cloth car is rewritten again, and timing is restarted.

[0106] Step S105: monitoring the state of the cloth car according to the state holding time.

[0107] Wherein, during the timing of the state holding time, the state of the cloth car is monitored, and the specific method is referred to the steps of Figure 5 , which prevents the cloth car from staying in an area for a long time, reduces the loss caused by the lag of data analysis of cloth car turnover, and further improves the standardization of cloth car turnover management.

[0108] Refer to Figure 2 , the step of obtaining the cloth car RFID tag information of the cloth car includes:

[0109] Step S200: obtaining a comprehensive interference index.

[0110] Wherein, the comprehensive interference index refers to the influence index of the object shielding and the electromagnetic interference on the RFID tag reading. The greater the influence index, the greater the interference, and the greater the required reading power. The specific obtaining method is referred to the steps of Figure 3 .

[0111] Step S201: determining the reading interference level according to the comprehensive interference index and the preset interference level determination rule.

[0112] Wherein, the interference level determination rule refers to the corresponding relationship between different comprehensive interference indexes and interference levels. If the interference index is less than 0.3, the interference level is determined to be low interference. If the interference index is between 0.3 and 0.7, the interference level is determined to be medium interference. If the interference index is greater than 0.7, the interference level is determined to be high interference.

[0113] The reading interference level refers to the influence level of the current environment on reading the RFID tag, which is obtained by the processing terminal according to the comprehensive interference index in the interference level determination rule.

[0114] Step S202: determining the target reading distance according to the reading interference level and the preset interference reading distance relationship.

[0115] The interference reading distance relationship refers to a corresponding relationship between the interference level and the reading distance, the reading distance of low interference is 2 meters, the reading distance of medium interference is 1.65 meters, and the reading distance of high interference is 1 meter.

[0116] The target reading distance refers to an optimal distance for reading the RFID tag of the current vehicle, and is obtained by the processing terminal according to the reading interference level in the mapping table corresponding to the interference reading distance relationship.

[0117] Step S203: Determine the interference level loss according to the reading interference level and the preset interference additional loss relationship.

[0118] The interference additional loss relationship refers to a corresponding relationship between the reading interference level and the interference level loss, the interference level loss of the low interference level is 2 dB, the interference level loss of the medium interference level is 6 dB, and the interference level loss of the high interference level is 10 dB.

[0119] The interference level loss refers to an additional loss under the target interference level, and is obtained by the processing terminal according to the reading interference level in the mapping table corresponding to the interference additional loss relationship.

[0120] Step S204: Analyze the target reading distance, the preset RFID operating frequency and the preset constant term to determine the target distance free space loss.

[0121] The RFID operating frequency refers to a general frequency of the frequency band corresponding to the RFID tag, and is determined by an operator according to the actual situation of the RFID tag. The constant term refers to a fixed compensation value when the unit of the target reading distance is meter and the unit of the RFID operating frequency is MHz, and 32.45 is taken as an example in the embodiment of the application and is derived from unit conversion and electromagnetic wave propagation constant.

[0122] The target distance free space loss refers to power attenuation of a signal due to space diffusion in propagation, and the greater the dB value is, the weaker the signal reaching the tag is. The target reading distance is calculated by the processing terminal as a logarithm with base 10, and then multiplied by 20 to obtain a first result. The RFID operating frequency is calculated as a logarithm with base 10, and then multiplied by 20 to obtain a second result. Finally, the sum of the first result, the second result and the constant term is calculated to obtain the target distance free space loss.

[0123] Step S205: Analyze the target distance free space loss, the interference level loss, the preset minimum identifiable received power, the preset reader antenna gain and the preset tag antenna gain to determine the actual reading power.

[0124] Wherein, the minimum identifiable receiving power refers to the minimum identifiable receiving power of the RFID tag, and a typical value is -85dBm, which is determined by the processing terminal according to the specific type of the RFID tag. The reader antenna gain refers to the gain of the reader antenna, and the tag antenna gain refers to the gain of the RFID tag, both of which are 3dB.

[0125] The actual reading power refers to the power actually read by the RFID tag, which is obtained by the processing terminal after analyzing the target distance free space loss, interference level loss, minimum identifiable receiving power, reader antenna gain and tag antenna gain, and the specific method refers to the steps of Figure 4 .

[0126] Step S206: Control the vehicle to approach the preset reader at the target reading distance, and control the reader to read the vehicle RFID tag information of the vehicle at the actual reading power.

[0127] Wherein, after determining the actual reading power, the vehicle is controlled to approach the reader at the target reading distance, and the reader is controlled to read the vehicle RFID tag information of the vehicle at the actual reading power, so as to ensure the accuracy of reading the RFID tag.

[0128] The reader refers to a reader for reading RFID tag information, which is installed at a designated position in different areas by an operator.

[0129] Referring to Figure 3 , the step of obtaining the comprehensive interference index comprises:

[0130] Step S300: Obtain signal reflection loss.

[0131] Wherein, the signal reflection loss refers to the loss of the tag reflection signal received by the reader, and the unit is dB, which is directly measured by the signal sampling unit of the reader.

[0132] Step S301: Determine the physical shielding coefficient according to the signal reflection loss and the preset physical shielding intensity quantification rule.

[0133] Wherein, the physical shielding intensity quantification rule refers to the corresponding relationship between the signal reflection loss and the physical shielding coefficient. When the signal reflection loss is greater than 9dB, the physical shielding coefficient is 1; when the signal reflection loss is less than 2dB, the physical shielding coefficient is 0.2; and when the signal reflection loss is between 2dB and 9dB, the physical shielding coefficient is obtained by the processing terminal calculating the product between 0.1 and the signal reflection loss.

[0134] The physical shielding coefficient refers to a value reflecting the influence of physical shielding on reading. The greater the physical shielding coefficient, the stronger the shielding, which is obtained by the processing terminal after analyzing and calculating the signal reflection loss according to the physical shielding intensity quantification rule.

[0135] Step S302: Obtain the peripheral electromagnetic field intensity.

[0136] The peripheral electromagnetic field intensity refers to the electromagnetic field intensity of the peripheral of the reader, and is detected by the built-in electromagnetic sensor, with a unit of μT.

[0137] Step S303: Determine the electromagnetic interference coefficient according to the peripheral electromagnetic field intensity and the preset electromagnetic interference intensity quantification rule.

[0138] The electromagnetic interference intensity quantification rule refers to the corresponding relationship between the peripheral electromagnetic field intensity and the electromagnetic interference coefficient. When the peripheral electromagnetic field intensity is greater than 16 μT, the electromagnetic interference coefficient is 1. When the peripheral electromagnetic field intensity is less than 5 μT, the electromagnetic interference coefficient is 0.2. When the peripheral electromagnetic field intensity is between 5 and 16 μT, the electromagnetic interference coefficient is calculated as the product of 0.04 and the peripheral electromagnetic field intensity.

[0139] The electromagnetic interference coefficient refers to a value reflecting the influence of the electromagnetic field intensity on reading. The greater the electromagnetic interference coefficient, the stronger the electromagnetic interference. The peripheral electromagnetic field intensity is analyzed and calculated by the processing terminal according to the electromagnetic interference intensity quantification rule.

[0140] Step S304: Analyze the physical shielding coefficient, the electromagnetic interference coefficient, and the preset interference weight coefficient to determine the comprehensive interference index.

[0141] The interference weight coefficient refers to the proportion of the physical shielding and the electromagnetic interference in the comprehensive interference index. In the embodiments of the present application, 0.5 is taken as an example.

[0142] The comprehensive interference index in this step is consistent with the comprehensive interference index in step S200, which is obtained by the processing terminal by weighted summation of the physical shielding coefficient, the electromagnetic interference coefficient, and the interference weight coefficient.

[0143] Referring to Figure 4 The step of analyzing the target distance free space loss, the interference level loss, the preset minimum identifiable received power, the preset reader antenna gain, and the preset tag antenna gain to determine the actual reading power includes:

[0144] Step S400: Analyze the target distance free space loss, the interference level loss, the minimum identifiable received power, the reader antenna gain, and the tag antenna gain to determine the basic reading power.

[0145] The basic reading power refers to the reading power calculated according to the loss and the physical conditions. The sum of the target distance free space loss, the minimum identifiable received power, and the interference level loss is calculated by the processing terminal, and then the basic reading power is obtained by subtracting the reader antenna gain and the tag antenna gain.

[0146] Step S401: determining the interference level power range according to the read interference level and the preset interference level power relationship.

[0147] The interference level power relationship refers to the corresponding relationship between the interference level and the interference level power range. When the interference is low, the interference level power range is 5-10 dBm. When the interference is medium, the interference level power range is 10-20 dBm. When the interference is high, the interference level power range is 20-30 dBm.

[0148] The interference level power range refers to the range of the read power under the current interference level, which is obtained by the processing terminal according to the read interference level in the mapping table corresponding to the interference level power relationship.

[0149] Step S402: analyzing the basic read power and the interference level power range to determine the actual read power.

[0150] The actual read power in this step is consistent with the actual read power in step S205. The processing terminal compares the basic read power and the interference level power range. If the basic read power is within the interference level power range, the basic read power is defined as the actual read power. If it exceeds, the boundary value of the interference level power range close to the basic read power is determined as the actual read power, which on one hand avoids too low accuracy of reading, and on the other hand avoids too high power.

[0151] Referring to Figure 5 , the step of monitoring the state of the bus according to the state holding time comprises:

[0152] Step S500: obtaining the state holding threshold time of the bus.

[0153] The state holding threshold time refers to the longest time value for indicating that the bus stays in the area. The specific obtaining method refers to the step of Figure 6 .

[0154] Step S501: determining whether the state holding time meets the requirement of the state holding threshold time.

[0155] The requirement of the state holding threshold time refers to not exceeding the state holding threshold time.

[0156] The processing terminal determines whether the state holding time does not exceed the state holding threshold time, thereby determining whether the bus stays in the current area for too long.

[0157] Step S5011: if not, prompting according to the preset stay timeout prompt information.

[0158] If the processing terminal determines that the state holding time exceeds the state holding threshold time, it indicates that the cloth car stays in the current area for too long, and thus the cloth car is prompted according to the stay timeout prompt information, so that the operator can timely maintain the cloth car, prevent the cloth car from staying in an area for a long time, reduce the loss caused by the lag of the cloth car turnover data analysis, and further improve the standardization of the cloth car turnover management.

[0159] The stay timeout prompt information is information for prompting that the cloth car stays in an area for too long, and can be in the form of voice, text and light combination.

[0160] Step S5012: If yes, the cloth car is monitored according to the state holding time and the state holding threshold time.

[0161] If the processing terminal determines that the state holding time does not exceed the state holding threshold time, it indicates that the cloth car stays in the current area for a time that does not exceed the maximum stay time, and thus the cloth car is monitored according to the state holding time and the state holding threshold time, so as to prevent the cloth car from staying for too long. For details, refer to the steps of Figure 7

[0162] Refer to Figure 6 The step of obtaining the state holding threshold time of the cloth car includes:

[0163] Step S600: Analyzing the cloth car RFID tag information, the area identification state and the preset cloth car state time rule to determine the basic threshold time.

[0164] The cloth car state time rule refers to the corresponding relationship between the cloth car state, the area and the stay time. Different cloths have different stay times in different areas. For example, the stay time of ordinary cloth in the laundry room is 60 minutes, and the stay time in the distribution area is 30 minutes. The stay time of large-area cloth in the laundry room is 90 minutes, and the stay time in the distribution area is 50 minutes. The operator counts the stay time of different cloths in different areas, and forms a mapping table by corresponding the cloth type, area and stay time one by one.

[0165] The basic threshold time refers to the reference time reflecting the processing difficulty of the cloth, which is obtained by the processing terminal according to the cloth car RFID tag information and the area identification state in the mapping table corresponding to the cloth car state time rule.

[0166] Step S601: Obtaining the area average time consumption and the current business load based on the area identification state.

[0167] The area average time consumption refers to the average time consumption of the cloth car in the area corresponding to the area identification state, which is obtained by the processing terminal by calculating the average value of the historical time consumption.

[0168] ​The current service load refers to the device busy degree of the area corresponding to the area identification state, which is obtained by the processing terminal calculating the quotient between the number of devices currently processing the cloth and the total number.

[0169] Step S602: Analyze the area average time consumption and the base threshold time to determine the historical time correction coefficient.

[0170] The historical time correction coefficient refers to the influence coefficient of the historical time consumption on the residence time, which is obtained by the processing terminal calculating the quotient between the area average time consumption and the base threshold time.

[0171] Step S603: Determine the load adjustment coefficient according to the current service load and the preset service load adjustment relationship.

[0172] The service load adjustment relationship refers to the corresponding relationship between the service load and the load adjustment coefficient. When the load is less than 0.6, the load adjustment coefficient is 1; when the load is between 0.6 and 0.8, the load adjustment coefficient is 1.05; when the load is between 0.8 and 0.9, the load adjustment coefficient is 1.1; and when the load is greater than 0.9, the load adjustment coefficient is 1.2.

[0173] The load adjustment coefficient refers to the adjustment coefficient of the residence time based on the real-time load, which is obtained by the processing terminal looking up in the mapping table corresponding to the service load adjustment relationship according to the current service load.

[0174] Step S604: Analyze the base threshold time, the historical time correction coefficient, and the load adjustment coefficient to determine the state retention threshold time of the cloth vehicle.

[0175] The state retention threshold time in this step is consistent with the state retention threshold time in step S500, which is obtained by the processing terminal calculating the product of the base threshold time, the historical time correction coefficient, and the load adjustment coefficient.

[0176] Referring to Figure 7 , the step of monitoring the state of the cloth vehicle according to the state retention time and the state retention threshold time includes:

[0177] Step S700: Obtain the health score of the cloth vehicle.

[0178] The health score refers to a score evaluating the state of the cloth vehicle. The higher the health score, the better the state of the cloth vehicle. For specific obtaining methods, refer to the steps of Figure 8 .

[0179] Step S701: Determine whether the health score meets the requirements of the preset health threshold.

[0180] The health threshold refers to a health score that needs to be paid attention to the bus stay time in advance. In this application, 60 points are taken as an example. The requirement of the health threshold is not less than the health threshold.

[0181] The processing terminal determines whether the health score is not less than the health threshold, so as to determine whether the stay time of the bus needs to be paid attention to in advance.

[0182] Step S7011: If it is consistent, it is determined whether the state retention time exceeds the state retention threshold time.

[0183] If the processing terminal determines that the health score is not less than the health threshold, it indicates that the health of the bus is high and is not prone to failure, so it is not necessary to pay attention to the stay time of the bus in advance. Therefore, it is determined whether the state retention time exceeds the state retention threshold time, so as to determine whether the stay time of the bus is too long.

[0184] Step S70111: If it is not exceeded, the state retention time of the bus is continuously acquired for cyclic determination.

[0185] If the processing terminal determines that the state retention time does not exceed the state retention threshold time, the state retention time of the bus is continuously detected, so as to continuously pay attention to the stay of the bus.

[0186] Step S70112: If it is exceeded, the preset stay timeout prompt information is prompted.

[0187] If the processing terminal determines that the state retention time exceeds the state retention threshold time, it indicates that the stay time of the bus is too long. Therefore, the stay timeout prompt information is prompted, so that the operator can timely repair the bus, prevent the bus from staying in one area for a long time, reduce the loss caused by the lag of bus flow data analysis, and further improve the standardization of bus flow management.

[0188] The stay timeout prompt information in this step is consistent with the stay timeout prompt information in step S5011, which is not described here.

[0189] Step S7012: If it is not consistent, the state retention threshold time is modified according to the preset damage correction time coefficient, and when the state retention time exceeds the modified state retention threshold time, the preset stay timeout prompt information is prompted.

[0190] If the processing terminal determines that the health score is less than the health threshold, it indicates that the health of the vehicle is low and it is prone to failure, resulting in excessively long dwell time. Therefore, the product of the damage correction time coefficient and the state holding threshold time is calculated to correct the state holding threshold time. When it is determined that the state holding time exceeds the corrected state holding threshold time, a prompt is made according to the dwell timeout prompt information, so as to pay attention to the vehicles that are prone to damage in advance.

[0191] The damage correction time coefficient refers to the correction coefficient for the dwell time threshold of easily damaged fabric carts. In this embodiment, 0.8 is used as an example.

[0192] Reference Figure 8 The steps to obtain the health score of the cloth vehicle include:

[0193] Step S800: Obtain the number of rotations of the rollers on the fabric cart.

[0194] The number of roller rotations refers to the number of times the rollers of the fabric cart rotate, which is detected by a miniature vibration sensor.

[0195] Step S801: Analyze the number of roller rotations and the preset rotation lifespan to determine the roller wear rate.

[0196] Among them, the rotation life count refers to the total life count of the fabric roller, which is determined by the operator according to the rated count marked by the roller manufacturer.

[0197] Roller wear rate refers to the degree of wear of the roller, which is obtained by calculating the quotient of the number of roller rotations and the number of rotational lifespans at the processing terminal.

[0198] Step S802: Analyze the roller wear rate and the preset roller wear rules to determine the roller wear score.

[0199] The roller wear rule refers to the calculation rule between roller wear rate and roller wear score. If the roller wear rate is less than 0.5, the roller wear score is 60. If the roller wear rate is between 0.5 and 0.7, the difference between the roller wear rate and 0.5 is calculated, divided by 0.2, and then multiplied by 60 to get the first result. The roller wear score is obtained by subtracting the first result from 60. If the roller wear rate exceeds 0.7, the roller wear score is 0.

[0200] Roller wear score refers to the score of roller wear. The higher the value, the lower the degree of wear. It is obtained by the processing terminal through calculation and analysis of roller wear rate according to roller wear rules.

[0201] Step S803: Obtain the real-time vibration frequency of the fabric vehicle.

[0202] Among them, the real-time vibration frequency refers to the vibration frequency of the fabric vehicle, which is detected by the vibration sensor.

[0203] Step S804: analyzing the real-time vibration frequency, the preset rated frequency mean value and the preset maximum deviation value to determine the vibration frequency deviation rate.

[0204] The rated frequency mean value refers to the vibration frequency when the cloth car is empty, for example, 5 Hz. The maximum deviation value refers to the maximum deviation value between the real-time vibration frequency and the rated frequency, and the specific value is determined by the operator according to the actual situation.

[0205] The vibration frequency deviation rate refers to the deviation rate between the real-time vibration frequency and the rated frequency, which is calculated by the processing terminal by dividing the absolute value of the difference between the real-time vibration frequency and the rated frequency mean value by the maximum deviation value.

[0206] Step S805: analyzing the vibration frequency deviation rate and the preset overload state rule to determine the overload state score.

[0207] The overload state rule refers to the calculation rule between the vibration frequency deviation rate and the overload state score. If the vibration frequency deviation rate is 0, the overload state score is 40 points. If the vibration frequency deviation rate is between 0 and 0.5, the quotient of the vibration frequency deviation rate and 0.5 is calculated, and then multiplied by 40 to get a first result. The difference between 40 and the first result is calculated to get the overload state score. If the vibration frequency deviation rate exceeds 0.5, the overload state score is 0.

[0208] The overload state score refers to the score of the cloth car loaded with cloth. The greater the overload state score, the stronger the carrying capacity of the cloth car, and the less likely it is to be damaged. The vibration frequency deviation rate is calculated by the processing terminal according to the overload state rule.

[0209] Step S806: analyzing the roller wear score and the overload state score to determine the health degree score of the cloth car.

[0210] The health degree score in this step is consistent with the health degree score in step S700, which is calculated by the processing terminal by summing the roller wear score and the overload state score.

[0211] Based on the same inventive concept, the embodiment of the present application provides a cloth car flow management system based on RFID, which comprises:

[0212] The acquisition module is configured to acquire cloth car RFID tag information, region identification state, state retention time, comprehensive interference index, signal reflection loss, surrounding electromagnetic field strength, state retention threshold time, region average time consumption, current business load, health degree score, roller rotation number and real-time vibration frequency.

[0213] The memory is configured to store the program of the cloth car flow management method based on RFID.

[0214] The processor can load and execute the program in the memory to implement an RFID-based cloth vehicle flow management method.

[0215] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional modules is exemplified, and in actual application, the above functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0216] The embodiment of the present application provides a computer readable storage medium, which stores a computer program capable of being loaded and executed by a processor to implement an RFID-based cloth vehicle flow management method.

[0217] The computer storage medium includes, for example, a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0218] Based on the same inventive concept, the embodiment of the present application provides an intelligent terminal, which comprises a memory and a processor, and the memory stores a computer program capable of being loaded and executed by the processor to implement an RFID-based cloth vehicle flow management method.

[0219] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional modules is exemplified, and in actual application, the above functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0220] The above are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Any feature disclosed in the specification (including the abstract and the drawings) can be replaced by other equivalent or similar features, unless specifically stated. That is, each feature is only an example of a series of equivalent or similar features, unless specifically stated.

Claims

1. An RFID-based cloth flow management method, characterized by, The method comprises the following steps: acquiring bus RFID tag information of a bus; determining a bus identification state of the bus according to the bus RFID tag information; acquiring a region identification state; judging whether the bus identification state meets the requirements of the region identification state; if not, prompting according to preset illegal region movement prompt information; if yes, analyzing the bus identification state and the region identification state to determine a rewritten identification state; rewriting the bus RFID tag information according to the rewritten identification state, and acquiring a state retention time of the bus; monitoring the state of the bus according to the state retention time; the step of acquiring the bus RFID tag information of the bus comprises the following steps: acquiring a comprehensive interference index; determining a reading interference level according to the comprehensive interference index and a preset interference level determination rule; determining a target reading distance according to the reading interference level and a preset interference reading distance relationship; determining an interference level loss according to the reading interference level and a preset interference additional loss relationship; analyzing the target reading distance, a preset RFID operating frequency and a preset constant term to determine a target distance free space loss; analyzing the target distance free space loss, the interference level loss, a preset minimum identifiable receiving power, a preset reader antenna gain and a preset tag antenna gain to determine an actual reading power; controlling the bus to approach a preset reader at the target reading distance, and controlling the reader to read the bus RFID tag information of the bus at the actual reading power; the step of acquiring the comprehensive interference index comprises the following steps: acquiring a signal reflection loss; determining a physical shielding coefficient according to the signal reflection loss and a preset physical shielding intensity quantification rule; acquiring a surrounding electromagnetic field intensity; determining an electromagnetic interference coefficient according to the surrounding electromagnetic field intensity and a preset electromagnetic interference intensity quantification rule; analyzing the physical shielding coefficient, the electromagnetic interference coefficient and a preset interference weight coefficient to determine the comprehensive interference index; the step of monitoring the state of the bus according to the state retention time comprises the following steps: acquiring a state retention threshold time of the bus; judging whether the state retention time meets the requirements of the state retention threshold time; if not, prompting according to preset retention timeout prompt information; if yes, monitoring the state of the bus according to the state retention time and the state retention threshold time; the step of acquiring the state retention threshold time of the bus comprises the following steps: analyzing the bus RFID tag information, the region identification state and a preset bus state time rule to determine a basic threshold time; acquiring a region average time consumption and a current business load based on the region identification state; analyzing the region average time consumption and the basic threshold time to determine a historical time correction coefficient; determining a load adjustment coefficient according to the current business load and a preset business load adjustment relationship; analyzing the basic threshold time, the historical time correction coefficient and the load adjustment coefficient to determine the state retention threshold time of the bus; the step of monitoring the state of the bus according to the state retention time and the state retention threshold time comprises the following steps: acquiring a health degree score of the bus; judging whether the health degree score meets the requirements of a preset health degree threshold; If yes, determine whether the state holding time exceeds a state holding threshold time; If no, continue to acquire the state holding time of the vehicle and make a loop determination; If yes, prompt according to a preset stay timeout prompt information; If no, modify the state holding threshold time according to a preset damage correction time coefficient, and prompt according to the preset stay timeout prompt information when the state holding time exceeds the modified state holding threshold time.

2. The RFID-based cloth flow management method according to claim 1, characterized by, The steps of analyzing the target distance free space loss, the interference level loss, the preset minimum identifiable receiving power, the preset reader antenna gain and the preset tag antenna gain to determine the actual reading power include: The steps of analyzing the target distance free space loss, the interference level loss, the minimum identifiable receiving power, the reader antenna gain and the tag antenna gain to determine the basic reading power include: Determining the interference level power range according to the reading interference level and a preset interference level power relationship; Analyzing the basic reading power and the interference level power range to determine the actual reading power.

3. The RFID-based cloth flow management method according to claim 1, characterized in that, The steps of acquiring the health degree score of the vehicle include: Acquiring the number of roller rotations of the vehicle; Analyzing the number of roller rotations and a preset rotation life number to determine a roller wear rate; Analyzing the roller wear rate and a preset roller wear rule to determine a roller wear score; Acquiring a real-time vibration frequency of the vehicle; Analyzing the real-time vibration frequency, a preset rated frequency mean and a preset allowable maximum deviation value to determine a vibration frequency deviation rate; Analyzing the vibration frequency deviation rate and a preset overload state rule to determine an overload state score; Analyzing the roller wear score and the overload state score to determine the health degree score of the vehicle.

4. An RFID-based cloth flow management system, characterized by, The steps of acquiring the health degree score of the vehicle include: An acquiring module, configured to acquire vehicle RFID tag information, a region identification state and a state holding time; A memory, configured to store a program of the RFID-based vehicle flow management method according to any one of claims 1 to 3; A processor, the program in the memory can be loaded and executed by the processor, and the RFID-based vehicle flow management method according to any one of claims 1 to 3 is implemented.

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