Storehouse tool and instrument dynamic management system

Abstract

The invention relates to the technical field of electrical warehouse management, and discloses a warehouse tool and instrument dynamic management system comprising a distance acquisition module used for acquiring a distance detection factor for detecting the distance between an RFID transmitter and an RFID receiver; the time module is used for recording the receiving time of the signal transmitted by the RFID transmitter and received by the RFID receiver; the first slave controller is used for judging whether the distance between the RFID transmitter and the RFID receiver is in a preset distance range or not according to the distance detection factor so as to obtain a first result whether the tool or the instrument is in the placement area or not; and the main controller is used for receiving the receiving time and the first result, analyzing the first result and then sending the analyzed first result and the corresponding receiving time to the terminal. According to the invention, the user can master the real-time information of the tools and instruments in the warehouse in real time.

Description

Technical Field

[0001] The invention relates to the technical field of electrical warehouse management, and in particular to a dynamic management system for warehouse tools and instruments. Background Art

[0002] There are many "small, sporadic, scattered, and rushed" types of work in the substation maintenance profession, and the work sites are relatively scattered. The types of tools and instruments are complex and the flow is fast. The frequency of entering and leaving the warehouse is high, and dynamic management is difficult. At this stage, the problems of tools and instruments entering and leaving the warehouse are as follows:

[0003] 1. Unable to clearly identify the accurate information of tools and instruments inside and outside the warehouse (e.g., whether they have passed the qualification period);

[0004] 2. Unable to grasp the types and quantities of instruments inside and outside the warehouse in real time;

[0005] 3. The location of the tools in storage is unreasonable;

[0006] 4. Expired tools are difficult to screen and cannot be counted and inspected in a timely manner.

[0007] The existence of the above problems leads to the following problems: relevant tools and instruments cannot be obtained in the warehouse before work is performed, the tool preparation stage takes too long, the tools brought to the work site have exceeded their qualification period and cannot be used, the location of tools in the warehouse is unreasonable, and expired tools cannot be updated in time and sent for inspection. Summary of the invention

[0008] The present invention provides a dynamic management system for tools and instruments in a warehouse, which uses RFID technology to realize the rapid entry and exit of tools and instruments. Team members can obtain tool information in real time, receive prompts for the placement of tools in the warehouse, and screen and send tools and instruments that have exceeded their qualification period for inspection.

[0009] The present invention is achieved through the following technical solutions:

[0010] A dynamic management system for warehouse tools and instruments, comprising:

[0011] A distance acquisition module, used for acquiring a distance detection factor for detecting the distance between an RFID transmitter and an RFID receiver, wherein the RFID receiver is arranged in a placement area, the RFID transmitter is arranged on a tool or instrument, and when the distance between the RFID receiver and the RFID transmitter is within a preset range, the distance detection factor is used to determine that the tool or instrument is within the placement area;

[0012] A time module, used to record the reception time of the signal transmitted by the RFID transmitter and received by the RFID receiver;

[0013] A first slave controller, configured to determine whether the distance between the RFID transmitter and the RFID receiver is within a preset distance range according to the distance detection factor, thereby obtaining a first result of whether the tool or instrument is within the placement area;

[0014] The main controller is used to receive the receiving time and the first result, parse the first result, and then send the parsed first result and the corresponding receiving time to the terminal.

[0015] As an optimization, the first result includes product information of the tool or instrument and judgment information of whether the tool or instrument is placed in place, wherein the product information includes the qualification period of the tool or instrument, the name of the tool or instrument and the time when the tool or instrument needs to be inspected, and the judgment information includes the judgment result of whether the tool or instrument is within the placement area.

[0016] As an optimization, the distance acquisition module includes an RFID receiver, a temperature sensor, a humidity sensor and a dust concentration sensor.

[0017] As an optimization, the first slave controller includes a distance detection module, a judgment module and an encoding module, wherein the distance detection module is used to calculate the distance between the RFID receiver and the RFID transmitter according to the distance detection factor;

[0018] The judgment module is used to judge whether the distance is within a preset range according to the distance calculated by the distance detection module. If so, the judgment information is combined with the product information as a first result and sent to the encoding module for encoding. Otherwise, the following operations are performed:

[0019] Triggering the alarm module set in the warehouse to perform alarm processing, and judging whether the distance between the RFID transmitter and the RFID receiver changes to a preset range within a certain period of time after the alarm, if so, canceling the alarm, and sending the new judgment information combined with the product information as the first result to the encoding module for encoding, otherwise, sending the old judgment information combined with the product information as the first result to the encoding module for encoding;

[0020] When the judgment module receives the distance calculated by the distance detection module, it triggers the time module to record the current time, and uses the current time as the reception time of the signal transmitted by the RFID transmitter.

[0021] As an optimization, two of the RFID transmitters and two of the RFID receivers are respectively provided. When the tool or instrument is placed in the center of the placement area, the two RFID transmitters and the two RFID receivers correspond one to one.

[0022] As an optimization, the distance detection factors include ambient temperature K, ambient humidity RH, ambient dust concentration H, RSSI strength and Q, and the transmission frequency f of the antenna in the RFID transmitter. The distance detection module is provided with a distance detection model, and the distance detection model is solved based on a genetic algorithm to obtain a feasible database. The feasible database includes several feasible elements, each of which includes all the matched distance detection factors. The specific process of solving the distance detection model based on the genetic algorithm is as follows:

[0023] A1. Set the number of iterations of the genetic algorithm and the number of individuals to be solved in each generation of the population;

[0024] A2. Establish a distance detection model, wherein the distance detection model includes an objective function and a set of constraint conditions, wherein the objective function is:

[0025] D s ∈[0,D max ];

[0026] Among them, D s is the actual distance between two RFID receivers and two RFID transmitters, D max is the upper limit of the sum of the distances between two RFID receivers and two RFID transmitters;

[0027] A3, encode the ambient temperature K, ambient humidity RH, ambient dust concentration H, RSSI strength and Q, and transmission frequency f to obtain the encoding value of the individual to be solved, and randomly generate an initial population consisting of several individuals to be solved based on the total constraint condition, let the initial population be the parent population, let the individual to be solved in the parent population be the parent individual, and the encoding value of each parent individual includes the ambient temperature K, ambient humidity RH, ambient dust concentration H, RSSI strength and Q, and the transmission frequency f of the antenna in the RFID transmitter;

[0028] A4. Perform a simulation experiment of placing the RFID transmitter in an area with a radius of R cm centered on the RFID receiver according to the coding values ​​of each parent individual of the parent population, and obtain the actual distance and D s , R is a positive number;

[0029] A5. According to the actual distance and D s Calculating a fitness function, and calculating the fitness value of each parent individual in the parent population according to the fitness function and sorting the fitness values;

[0030] A6, saving the first N parent individuals with the largest fitness values ​​in the parent population, performing crossover mutation operations on all parent individuals except the first N parent individuals with the largest fitness values ​​to form a new parent population, and then returning to A4;

[0031] A7. Repeat A4-A6 until the number of iterations is reached or the objective function value is within a specified threshold range. The parent population finally obtained is the feasible database, and the parent individuals in the parent population are feasible elements.

[0032] As an optimization, the fitness function

[0033] As an optimization, the constraint condition set includes temperature constraint, humidity constraint, dust concentration constraint, RSSI intensity constraint and transmission frequency constraint, among which,

[0034] The temperature constraint is expressed as:

[0035] 10≤K≤30;

[0036] The unit is degrees Celsius;

[0037] The humidity constraint is expressed as:

[0038] 40%≤RH≤60%;

[0039] The dust concentration constraint is expressed as:

[0040] H≤10;

[0041] The unit is mg / m 3 ;

[0042] The RSSI strength constraint is expressed as:

[0043] -40≤Q≤-80;

[0044] The unit is dBm;

[0045] The transmit frequency constraint is expressed as:

[0046] 30≤v≤300;

[0047] The unit is kHz.

[0048] As an optimization, it also includes a second slave controller and an environment acquisition module. The second slave controller is provided with an access control module, the access control module is used to set the access control authority of personnel entering and leaving the warehouse, and the environment acquisition module is used to collect environmental data in the warehouse.

[0049] As an optimization, the main controller includes a decoding module and a receiving storage module. The decoding module is used to receive the first result output by the first slave controller and the receiving time output by the time module through the first communication module, and after decoding the first result, transmit the decoded first result and the receiving time to the terminal through the third communication module. The receiving storage module is used to receive the output results of the second slave controller and the environment acquisition module through the second communication module, and transmit the output results of the second slave controller and the environment acquisition module to the terminal through the third communication module.

[0050] As an optimization, the models of the first communication module and the second communication module are NRF24L01, and the model of the third communication module is SIM800c.

[0051] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0052] The invention discloses a dynamic management system for tools and instruments in a warehouse. A passive RFID electronic tag (RFID transmitter) is fixed at an appropriate position of the instrument and tool. The RFID electronic tag is matched with an RFID reader through coupling. The RFID reader is fixed at an appropriate position of a shelf in the warehouse. When the electronic tag matched with the RFID electronic tag approaches, the reader identifies the tag, and the light-emitting diode connected in series with the reader signal line lights up. The corresponding terminal of the Arduino slave connected with the signal line detects a high potential. The Arduino slave forms a "0 / 1" string according to the potential information of the corresponding terminal and its own category, and compiles the string into hexadecimal characters and sends it to the Arduino host through the NRF24L01 module. The Arduino host receives and parses the string, stores the name and validity period of each instrument and tool in its internal running program, and exchanges information with the user's mobile phone in the form of text messages through the SIM800c module. The user obtains the real-time information of tools and instruments in the warehouse according to the content of the message replied by the Arduino host.

[0053] The distance detection model obtained by genetic algorithm can reduce the impact of environmental factors on distance detection, thereby making distance detection more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0055] Figure 1 A connection diagram of a system for a dynamic management system for warehouse tools and instruments according to the present invention;

[0056] Figure 2Another connection diagram of a system for a dynamic management system for warehouse tools and instruments according to the present invention;

[0057] Figure 3 Figure 2 is a schematic diagram of the hardware connection between the slave controller and the master controller.

[0058] Figure 4 Schematic diagram of the hardware structure and wiring method of the first slave controller.

[0059] Figure 5 This is a schematic diagram of the hardware structure and wiring method of the main controller. DETAILED DESCRIPTION

[0060] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0061] This embodiment 1 provides a dynamic management system for warehouse tools and instruments, such as Figure 1 As shown, including:

[0062] 1. Distance acquisition module.

[0063] The distance acquisition module is used to acquire a distance detection factor for detecting the distance between an RFID transmitter and an RFID receiver, wherein the RFID receiver is arranged in a placement area, the RFID transmitter is arranged on a tool or instrument, and when the distance between the RFID receiver and the RFID transmitter is within a preset range, the distance detection factor is used to determine that the tool or instrument is within the placement area;

[0064] The shape and size of the placement area are determined by the shape of the tool or instrument, and the placement area can completely accommodate the tool or instrument and the tool or instrument has a certain displacement space in the placement area, that is, the tool or instrument is considered to be in the placement area when it moves to a certain extent. When the tool or instrument is placed in the center of the placement area, the RFID transmitter and the RFID receiver are arranged opposite each other.

[0065] Since the signal strength of RFID is affected by the environment, the signal strength of RFID (RSSI signal) is not linearly related to the distance between the RFID receiver and the RFID transmitter. In order to reduce the error of environmental factors in judging the distance between the RFID receiver and the RFID transmitter, environmental factors need to be taken into account when considering the distance between the RFID receiver and the RFID transmitter.

[0066] In some embodiments, the distance acquisition module includes an RFID receiver, a temperature sensor, a humidity sensor, and a dust concentration sensor. Correspondingly, the distance detection factors include ambient temperature K, ambient humidity RH, ambient dust concentration H, RSSI intensity and Q, and the transmission frequency f of the antenna in the RFID transmitter. Among them, the RSSI intensity Q and the transmission frequency f of the antenna in the RFID transmitter can be obtained by the RFID receiver. In this embodiment, since it is to detect whether the tools and instruments in the warehouse are in place, a large reading range is not required. Therefore, the RFID antenna uses a low-frequency antenna. The low-frequency antenna has a shorter reading range, generally between a few centimeters and one meter, but the low-frequency antenna has a strong anti-interference ability. The low-frequency RFID antenna has less interference with metals and liquids, so it is suitable for tag identification and tracking in these environments.

[0067] In some embodiments, two of the RFID transmitter and two of the RFID receiver are respectively provided. When the tool or instrument is placed in the center of the placement area, the two RFID transmitters and the two RFID receivers correspond to each other one by one.

[0068] Since tools or instruments are placed in a rectangular tool box, whether the tools or instruments are placed in the placement area actually refers to whether the tool box is placed in the placement area.

[0069] The two RFID receivers can be symmetrically arranged in the placement area, can be asymmetrically arranged, and can be arranged according to actual conditions. The RFID transmitter is arranged correspondingly according to the position of the RFID receiver.

[0070] It should be noted that the distance between the RFID transmitter and the RFID receiver refers to the distance between the center of the RFID transmitter and the center of the RFID receiver. The RFID transmitter and the RFID receiver are both circular, so the distance between the RFID transmitter and the RFID receiver is the distance between the centers of the two circles. RSSI strength and Q refer to the sum of the signal strengths received by two RFID transmitters and RFID receivers. For example, the two RFID transmitters are A and B, and the two RFID receivers are A. ′ and B ′ , then RSSI strength and Q refer to A ′ The signal strength of receiving A and B and B ′ The sum of the signal strengths of receiver A and receiver B.

[0071] 2. Time module.

[0072] The time module is used to record the reception time of the signal transmitted by the RFID transmitter received by the RFID receiver; the triggering mechanism of the time module is the triggering signal given by the first slave controller, and the specific process will be described in detail when introducing the first slave controller.

[0073] 3. The first slave controller.

[0074] The first slave controller is used to determine whether the distance between the RFID transmitter and the RFID receiver is within a preset distance range according to the distance detection factor, so as to obtain a first result of whether the tool or instrument is in the placement area;

[0075] In some embodiments, the first result includes product information of the tool or instrument and judgment information of whether the tool or instrument is in place, wherein the product information includes the qualified period of the tool or instrument, the name of the tool or instrument, and the time when the tool or instrument needs to be inspected, and the judgment information includes the judgment result of whether the tool or instrument is in the placement area. The radio frequency information received by the RFID receiver may include the qualified period of the tool or instrument, the name of the tool or instrument, and the time when the tool or instrument needs to be inspected, and this information can be set in advance in the radio frequency information.

[0076] Correspondingly, in some embodiments, the first slave controller includes a distance detection module, a judgment module and an encoding module, wherein the distance detection module is used to calculate the distance between the RFID receiver and the RFID transmitter according to the distance detection factor;

[0077] In this embodiment, a distance detection model is provided in the distance detection module, and a feasible database is obtained by solving the distance detection model based on a genetic algorithm. The feasible database includes a plurality of feasible elements, and each of the feasible elements includes all matched distance detection factors.

[0078] In fact, the distance detection module is a large database, which stores feasible elements composed of multiple distance detection factors.

[0079] The specific process of solving the distance detection model based on the genetic algorithm is:

[0080] A1. Set the number of iterations of the genetic algorithm and the number of individuals to be solved in each generation of the population;

[0081] A2. Establish a distance detection model, wherein the distance detection model includes an objective function and a set of constraint conditions, wherein the objective function is:

[0082] D s ∈[0,Dmax ];

[0083] Among them, D s is the actual distance between the two RFID receivers and the two RFID transmitters, D max is the upper limit of the sum of the distances between two RFID receivers and two RFID transmitters;

[0084] For example, two RFID transmitters are A and B, and two RFID receivers are A and B. ′ and B ′ , then D s A ′ The distances between A and B and B ′ The sum of the distances to A and B respectively.

[0085] D s =D A′，A +D A′，B +D B′，A +D B′，B , D A′，A , D A′，B , D B′，A , D B′，B A ′ The distance between A and ′ The distance between B and ′ The distance between A and B ′ The distance between A and B.

[0086] The objective function here means that if the actual distance is less than the upper limit value, the tool or instrument is deemed to be within the set placement area.

[0087] A3, encode the ambient temperature K, ambient humidity RH, ambient dust concentration H, RSSI strength and Q, and transmission frequency f to obtain the encoding value of the individual to be solved, and randomly generate an initial population consisting of several individuals to be solved based on the total constraint condition, let the initial population be the parent population, let the individual to be solved in the parent population be the parent individual, and the encoding value of each parent individual includes the ambient temperature K, ambient humidity RH, ambient dust concentration H, RSSI strength and Q, and the transmission frequency f of the antenna in the RFID transmitter;

[0088] A4. Perform a simulation experiment of placing the RFID transmitter in an area with a radius of R cm centered on the RFID receiver according to the coding values ​​of each parent individual of the parent population, and obtain the actual distance and D s , R is a positive number;

[0089] A5. According to the actual distance and D sCalculate the fitness function, and calculate the fitness value of each parent individual in the parent population according to the fitness function and sort them; in this embodiment, the fitness function

[0090] Here, the actual distance and D s The smaller it is, the smaller the distance between the two RFID transmitters and the two RFID receivers is, and the larger the fitness value is.

[0091] A6, saving the first N parent individuals with the largest fitness values ​​in the parent population, performing crossover mutation operations on all parent individuals except the first N parent individuals with the largest fitness values ​​to form a new parent population, and then returning to A4;

[0092] Specifically, the first N parent individuals with the largest fitness values ​​in the parent population are saved, and parent individuals are selected from all parent individuals except the first N parent individuals with the largest fitness values ​​by roulette wheel to perform crossover and mutation operations to obtain child individuals, and then the fitness values ​​of the child individuals after crossover and mutation are calculated and sorted, and the child individuals are reinserted into the parent population according to the fitness values, and a set number of individuals to be solved are selected to form a new parent population, and then return to A4;

[0093] A7. Repeat A4-A6 until the number of iterations is reached or the objective function value is within a specified threshold range. The parent population finally obtained is the feasible database, and the parent individuals in the parent population are feasible elements.

[0094] Since the feasible database obtained by the sequential genetic algorithm may not include

[0095] In some embodiments, the set of constraints includes temperature constraints, humidity constraints, dust concentration constraints, RSSI strength constraints, and transmission frequency constraints, wherein:

[0096] The temperature constraint is expressed as:

[0097] 10≤K≤30;

[0098] The unit is degrees Celsius;

[0099] The humidity constraint is expressed as:

[0100] 40%≤RH≤60%;

[0101] The dust concentration constraint is expressed as:

[0102] H≤10;

[0103] The unit is mg / m 3 ;

[0104] The RSSI strength constraint is expressed as:

[0105] -40≤Q≤-80;

[0106] The unit is dBm;

[0107] The transmit frequency constraint is expressed as:

[0108] 30≤v≤300;

[0109] The unit is kHz.

[0110] The judgment module is used to judge whether the distance is within a preset range according to the distance calculated by the distance detection module. If so, the judgment information is combined with the product information as a first result and sent to the encoding module for encoding. Otherwise, the following operations are performed:

[0111] Triggering the alarm module set in the warehouse to perform alarm processing, and judging whether the distance between the RFID transmitter and the RFID receiver changes to a preset range within a certain period of time after the alarm, if so, canceling the alarm, and sending the new judgment information combined with the product information as the first result to the encoding module for encoding, otherwise, sending the old judgment information combined with the product information as the first result to the encoding module for encoding;

[0112] The encoding module is mainly used to encode the first result into a signal format that can be transmitted via wireless signals.

[0113] If the tools or instruments are placed in the preset area, then the first result can be product information | Yes, if the tools or instruments are not placed in the preset area, the alarm module will give priority to alarm prompting. If the staff puts the tools or instruments again, the alarm will be canceled, and the RFID receiver will receive the radio frequency signal of the new RFID transmitter again, and transmit the new RSSI strength and combined temperature, humidity, and dust concentration to the distance detection module for distance detection.

[0114] Here, the alarm module may be an audible or visual alarm.

[0115] When the judgment module receives the distance calculated by the distance detection module, it triggers the time module to record the current time, and uses the current time as the reception time of the signal transmitted by the RFID transmitter.

[0116] In this embodiment, the time is in seconds, and since the operation time of the distance detection module is extremely short, even if there is an error between the RFID receiver actually receiving the radio frequency signal emitted by the RFID transmitter and the trigger time of the judgment module trigger time module, the error will only be a few seconds and can be ignored.

[0117] It should be noted that after the RFID receiver receives the first sampling time point of the RF signal emitted by the RFID transmitter, the collected RF signal will not be immediately sent to the distance detection module. This is because in the process of placing tools or instruments, the tools or instruments will gradually approach the placement area, and the RFID receiver will receive the RF signal of the RFID transmitter in advance. In the process of gradually approaching, it is inaccurate to use the RSSI strength of the RF signal as a distance detection factor to detect the distance. Therefore, a switch and a control module can be set between the distance acquisition module and the distance detection module, such as Figure 2 As shown, when the control module detects that the RSSI strength of the radio frequency signal changes from 0 to no longer changes, the link between the distance acquisition module and the distance detection module is closed, and after the RSSI strength of the radio frequency signal is detected to be 0 or the RSSI strength changes, the switch is disconnected. In this way, the RSSI strength of the radio frequency signal can be detected more accurately, and the distance detection can be ensured to be more accurate.

[0118] 4. Main controller.

[0119] The main controller is used to receive the receiving time and the first result, parse the first result, and then send the parsed first result and the corresponding receiving time to the terminal.

[0120] In some embodiments, it also includes a second slave controller and an environment acquisition module. The second slave controller is provided with an access control module, the access control module is used to set the access control authority of personnel entering and exiting the warehouse, and the environment acquisition module is used to collect environmental data in the warehouse.

[0121] In some embodiments, the main controller includes a decoding module and a receiving storage module. The decoding module is used to receive the first result output by the first slave controller and the receiving time output by the time module through the first communication module, and after decoding the first result, transmit the decoded first result and the receiving time to the terminal through the third communication module. The receiving storage module is used to receive the output results of the second slave controller and the environment acquisition module through the second communication module, and transmit the output results of the second slave controller and the environment acquisition module to the terminal through the third communication module.

[0122] The master controller and slave controller are Arduino host and Arduino slave respectively.

[0123] The models of the first communication module and the second communication module are NRF24L01, and the model of the third communication module is SIM800c.

[0124] Specifically, the environment acquisition module includes a temperature sensor, a humidity sensor, a dust concentration sensor and an image collector. The image collector is mainly set at the door of the warehouse to photograph the tools in the toolbox, so as to determine whether the tools in the toolbox are complete, which is convenient for checking the storage status of tools and instruments.

[0125] The present invention can solve the problems caused by the large number of tools and instruments for substation maintenance and the high frequency of entering and leaving the warehouse: the inability to obtain relevant tools and instruments in the warehouse before the work is performed, the tool preparation stage takes too long, the tools brought to the work site have exceeded the qualified period and cannot be used, the position of the tools in the warehouse is unreasonable, and the expired tools cannot be updated in time and sent for inspection. The system can effectively monitor the entry and exit status of relevant tools and instruments, whether the tools and instruments are placed in the warehouse reasonably, and whether the tools are within the qualified period.

[0126] A light-emitting diode is also provided. When the tools or instruments are placed in the preset area, the light-emitting diode emits light. The light-emitting diode connects the RFID receiver signal end and the relevant terminal of the Arduino slave. When the tools and instruments are placed in the correct position, the RFID reader signal end generates a high potential, the light-emitting diode is on, and the corresponding Arduino terminal senses the high potential. When the tools and instruments are placed in the incorrect position, the signal end is at a low point, the light-emitting diode is off, and the corresponding Arduino terminal senses the low potential. The Arduino slave reads the potential of the relevant terminal to generate a four-digit binary number of "0 / 1".

[0127] The relevant connecting wires between the modules of this system are DuPont wires of various colors and lengths and power wires with DC interfaces. The DuPont wires connect the Arduino and the modules of the present invention, provide power to the modules and collect relevant module information. The power supply of each module in this system comes from the Arduino adapter power supply, which is a mercury-free dry battery of 9V / 6F22, and provides working power for the Arduino host and Arduino slave in this system.

[0128] The RFID receiver is RD522. It reads the RFID electronic tag close to itself. If it can identify the tag, it means that the tools and instruments are placed in the correct position. If it cannot identify the tag, it means that the tools and instruments are placed in the wrong position. If there is no tag in the area, it means that the tools and instruments at the original position have been shipped out.

[0129] In some embodiments, the first slave controller may be provided in plurality. The hardware connection between the slave controller and the master controller in the management system of the present invention is as follows: Figure 3 shown.

[0130] The hardware structure and wiring method of the first slave controller are as follows Figure 4 shown.

[0131] The hardware structure and wiring method of the main controller are as follows: Figure 5 shown.

[0132] The practical use of the present invention is described by taking a typical work using the tool as an example.

[0133] In the present invention, the user can learn the status information of the instruments and tools in the warehouse by sending and receiving text messages. The specific steps are as follows:

[0134] Step 1: Fix the passive RFID electronic tag to the appropriate position of the instrument and tool. The RFID electronic tag is matched with the unique RFID reader through coupling ( Figure 4 );

[0135] Step 2: The RFID reader is fixed at an appropriate position on the warehouse shelf. When a matching electronic tag approaches, the reader identifies the tag, the LED connected in series to the reader's signal line lights up, and the corresponding terminal of the Arduino slave connected to the signal line detects a high potential. When an electronic tag that does not match it approaches, the reader cannot identify the tag, the LED connected in series to the reader's signal line goes out, and the corresponding terminal of the Arduino slave connected to the signal line detects a low potential. When no electronic tag approaches, the LED connected in series to the reader's signal line goes out, and the corresponding terminal of the Arduino slave connected to the signal line detects a low potential;

[0136] Step 3: The Arduino slave forms a "0 / 1" string based on the potential information of the corresponding terminal and its own category, and compiles the string into hexadecimal characters and sends it to the Arduino master via the NRF24L01 module, such as Figure 3 The Arduino slave reads the potential of its own terminals 2, 3, 4, and 5 to get "1001", adds the slave category flag "1" to form "11001", and compiles the binary number into "19" and sends it to the Arduino master through the NRF24L01 module;

[0137] Step 4: The Arduino host receives and parses the string. The internal running program stores the name, validity period and damage of each instrument and tool. The SIM800c module exchanges information with the user's mobile phone in the form of text messages. The Arduino host replies with relevant information based on the content of the text message received from the user's mobile phone ( Figure 5 );

[0138] Step 5: Users can obtain real-time information about tools and instruments in the warehouse based on the information provided by the Arduino host.

[0139] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dynamic management system for warehouse tools and instruments, characterized in that: include: A distance acquisition module, used for acquiring a distance detection factor for detecting the distance between an RFID transmitter and an RFID receiver, wherein the RFID receiver is arranged in a placement area, the RFID transmitter is arranged on a tool or instrument, and when the distance between the RFID receiver and the RFID transmitter is within a preset range, the distance detection factor is used to determine that the tool or instrument is within the placement area; A time module, used to record the reception time of the signal transmitted by the RFID transmitter and received by the RFID receiver; A first slave controller, configured to determine whether the distance between the RFID transmitter and the RFID receiver is within a preset distance range according to the distance detection factor, thereby obtaining a first result of whether the tool or instrument is within the placement area; The main controller is used to receive the receiving time and the first result, parse the first result, and then send the parsed first result and the corresponding receiving time to the terminal.

2. A dynamic management system for warehouse tools and instruments according to claim 1, characterized in that: The distance acquisition module includes an RFID receiver, a temperature sensor, a humidity sensor and a dust concentration sensor.

3. A dynamic management system for warehouse tools and instruments according to claim 1, characterized in that: The first result includes product information of the tool or instrument and judgment information of whether the tool or instrument is placed in place, wherein the product information includes the qualification period of the tool or instrument, the name of the tool or instrument and the time when the tool or instrument needs to be inspected, and the judgment information includes the judgment result of whether the tool or instrument is in the placement area.

4. A dynamic management system for warehouse tools and instruments according to claim 3, characterized in that: The first slave controller includes a distance detection module, a judgment module and an encoding module, wherein the distance detection module is used to calculate the distance between the RFID receiver and the RFID transmitter according to the distance detection factor; The judgment module is used to judge whether the distance is within a preset range according to the distance calculated by the distance detection module. If so, the judgment information is combined with the product information as a first result and sent to the encoding module for encoding. Otherwise, the following operations are performed: Triggering the alarm module set in the warehouse to perform alarm processing, and judging whether the distance between the RFID transmitter and the RFID receiver changes to a preset range within a certain period of time after the alarm, if so, canceling the alarm, and sending the new judgment information combined with the product information as the first result to the encoding module for encoding, otherwise, sending the old judgment information combined with the product information as the first result to the encoding module for encoding; When the judgment module receives the distance calculated by the distance detection module, it triggers the time module to record the current time, and uses the current time as the reception time of the signal transmitted by the RFID transmitter.

5. A dynamic management system for warehouse tools and instruments according to claim 4, characterized in that: The RFID transmitter and the RFID receiver are respectively provided with two, and when the tool or instrument is placed in the center of the placement area, the two RFID transmitters and the two RFID receivers correspond to each other one by one.

6. A dynamic management system for warehouse tools and instruments according to claim 5, characterized in that: The distance detection factors include the ambient temperature K, the ambient humidity RH, the ambient dust concentration H, the RSSI strength and Q, and the transmission frequency f of the antenna in the RFID transmitter. The distance detection module is provided with a distance detection model, and the distance detection model is solved based on a genetic algorithm to obtain a feasible database, the feasible database includes a number of feasible elements, each of which includes all the matched distance detection factors, and the specific process of solving the distance detection model based on the genetic algorithm is: A1. Set the number of iterations of the genetic algorithm and the number of individuals to be solved in each generation of the population; A2. Establish a distance detection model, wherein the distance detection model includes an objective function and a set of constraint conditions, wherein the objective function is: D s ∈[0,D max ]; Among them, D s is the actual distance between two RFID receivers and two RFID transmitters, D max is the upper limit of the sum of the distances between two RFID receivers and two RFID transmitters; A3, encode the ambient temperature K, ambient humidity RH, ambient dust concentration H, RSSI strength and Q, and transmission frequency f to obtain the encoding value of the individual to be solved, and randomly generate an initial population consisting of several individuals to be solved based on the total constraint condition, let the initial population be the parent population, let the individual to be solved in the parent population be the parent individual, and the encoding value of each parent individual includes the ambient temperature K, ambient humidity RH, ambient dust concentration H, RSSI strength and Q, and the transmission frequency f of the antenna in the RFID transmitter; A4. Perform a simulation experiment of placing the RFID transmitter in an area with a radius of R cm centered on the RFID receiver according to the coding values ​​of each parent individual of the parent population, and obtain the actual distance and D s , R is a positive number; A5. According to the actual distance and D s Calculating a fitness function, and calculating and sorting the fitness value of each parent individual in the parent population according to the fitness function; A6, saving the first N parent individuals with the largest fitness values ​​in the parent population, performing crossover mutation operations on all parent individuals except the first N parent individuals with the largest fitness values ​​to form a new parent population, and then returning to A4; A7. Repeat A4-A6 until the number of iterations is reached or the objective function value is within a specified threshold range. The parent population finally obtained is the feasible database, and the parent individuals in the parent population are feasible elements.

7. A dynamic management system for warehouse tools and instruments according to claim 6, characterized in that: The fitness function The constraint condition set includes temperature constraint, humidity constraint, dust concentration constraint, RSSI intensity constraint and transmission frequency constraint, wherein: The temperature constraint is expressed as: 10≤K≤30； The unit is Celsius; The humidity constraint is expressed as: 40%≤RH≤60%; The dust concentration constraint is expressed as: H≤10； The unit is mg / m 3 ; The RSSI strength constraint is expressed as: -40≤Q≤-80； The unit is dBm; The transmit frequency constraint is expressed as: 30≤v≤300； The unit is kHz.

8. A dynamic management system for warehouse tools and instruments according to claim 1, characterized in that: It also includes a second slave controller and an environment collection module. The second slave controller is provided with an access control module, the access control module is used to set the access control authority of personnel entering and leaving the warehouse, and the environment collection module is used to collect environmental data in the warehouse.

9. A dynamic management system for warehouse tools and instruments according to claim 8, characterized in that: The main controller includes a decoding module and a receiving storage module. The decoding module is used to receive the first result output by the first slave controller and the receiving time output by the time module through the first communication module, and after decoding the first result, transmit the decoded first result and the receiving time to the terminal through the third communication module. The receiving storage module is used to receive the output results of the second slave controller and the environment acquisition module through the second communication module, and transmit the output results of the second slave controller and the environment acquisition module to the terminal through the third communication module.

10. A dynamic management system for warehouse tools and instruments according to claim 9, characterized in that: The models of the first communication module and the second communication module are NRF24L01, and the model of the third communication module is SIM800c.

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