A construction site material tracking method and system based on the combination of Bluetooth and RFID technology

Abstract

The present invention provides a construction site material tracking method and system based on the combination of Bluetooth and RFID technologies. The present invention adopts the combination of Bluetooth and RFID technologies to realize the information collection and transmission of construction site material consumables, and judges abnormal conditions of construction materials based on the transfer path of the materials, the length of stay at each point and the transfer time; at the same time, the construction site patrol car dynamically adjusts the inspection path, and the communication between the construction site patrol car and the first Bluetooth terminal at each point adopts dynamic encryption technology; thereby, the solution of the present invention can improve the accuracy of tracing construction site materials and at the same time improve the efficiency of construction site material management.

Description

Technical Field

[0001] The present invention relates to the technical field of material tracking, and in particular to a construction site material tracking method and system based on a combination of Bluetooth and RFID technologies. Background Art

[0002] At present, due to the large number of people on construction sites, the complex environment caused by the operation of construction equipment, the unclear division of areas, and the wide variety of construction consumables required for construction, the management of construction materials on the construction site is not perfect and lacks refined management, resulting in the waste and loss of many construction materials, and the inability to effectively control construction costs.

[0003] Currently, construction supplies are mostly managed manually, which consumes significant manpower and material resources. In the event of loss or anomalies, it is impossible to track the status of materials. With the widespread adoption of next-generation information technology in various fields, the use of digital methods to manage and trace materials on construction sites has become a pressing issue.

[0004] In view of the above problems, the present invention proposes a construction site material tracking method and system based on the combination of Bluetooth and RFID technologies. Summary of the Invention

[0005] In response to the current problems of irregular material management and lack of traceability at construction sites, the present invention proposes a construction site material tracking method based on the combination of Bluetooth and RFID technology. The method specifically includes the following steps:

[0006] S1. When the construction consumables enter the current virtual area, the tag reader within the current virtual area reads the RFID tag on the construction consumables and writes the current location and entry time to the RFID tag;

[0007] When the construction consumables leave the current virtual area, the tag reader in the current virtual area reads the RFID tag on the construction consumables and writes the departure time into the RFID tag;

[0008] Furthermore, a batch of construction consumables may have one or more RFID tags, which is determined by the type of consumables.

[0009] Furthermore, the construction site is divided into multiple points according to the area, and each point is an area, namely the point virtual area;

[0010] For example, the overall space of the construction site is divided into four points A, B, C, and D according to the area. Each point corresponds to an area, that is, the point virtual area. The above four areas constitute the overall space of the construction site.

[0011] Furthermore, a tag reader and a first Bluetooth terminal are installed in each point virtual area;

[0012] The tag reader is capable of reading data from an RFID tag on a construction consumable material, and the tag reader is connected to the first Bluetooth terminal;

[0013] Furthermore, the tag reader reads data from the RFID tag on the building consumables including: building consumables number, building consumables name, supplier number, supplier name, and transfer path;

[0014] Each RFID tag corresponds to one piece of the above data; when a batch of construction consumables has multiple RFID tags, the batch of construction consumables corresponds to multiple pieces of the above data.

[0015] The transfer path includes the time when the construction consumables enter and leave the virtual area of ​​each point. The specific data format is: {[point 1, entry time, exit time], [point 2, entry time, exit time], ... [point i, entry time, exit time]};

[0016] For example, when a construction consumable enters point i+1, the number and entry time of point i+1 are written into the transfer path in the RFID tag, such as {[point 1, entry time, exit time], [point 2, entry time, exit time], … [point i, entry time, exit time], [point i+1, entry time]};

[0017] When the construction consumables leave point i+1, the time of leaving point i+1 is written into the transfer path in the RFID tag, such as {[point 1, entry time, departure time], [point 2, entry time, departure time], ... [point i, entry time, departure time], [point i+1, entry time, departure time]}.

[0018] When the construction consumables leave point i+1, the number of RFID tags with the same construction consumable number and the same supplier number is counted as the total number of construction consumables in the batch, and the total number is written to each RFID tag belonging to the same batch of construction consumables;

[0019] For example, for a batch of construction consumables, it contains 3 RFID tags, then the construction consumable numbers and supplier numbers in the 3 RFID tags are equal. When the construction consumables leave the point, the total number 3 is written into each of the 3 RFID tags of the batch of construction consumables.

[0020] S2. The tag reader reads the data on the RFID tag of the construction supplies and sends it to the first Bluetooth terminal installed in the same virtual area as the tag reader;

[0021] S3. The first Bluetooth terminal saves the data in the RFID tag on the construction consumables sent by the tag reader and performs data analysis to obtain data analysis results;

[0022] When the construction site patrol car enters the virtual area of ​​the current point, the first Bluetooth terminal sends the data in all RFID tags stored in it to the construction site patrol car;

[0023] The construction site patrol car patrols each point along the patrol route and collects multiple RFID tag data from the first Bluetooth terminal at each point;

[0024] Furthermore, a second Bluetooth terminal is installed on the construction site patrol car. When the construction site patrol car enters the point virtual area, the second Bluetooth terminal communicates with the first Bluetooth terminal in the point virtual area.

[0025] S4. The construction site patrol car dynamically adjusts its patrol route based on abnormal conditions of construction consumables in each virtual area.

[0026] S5. The construction site patrol car transmits the data collected from the first Bluetooth terminal in each virtual area to the material tracking platform, and the material tracking platform dynamically displays the construction consumables data in real time.

[0027] The present invention also proposes a construction site material tracking system based on the combination of Bluetooth and RFID technology, wherein the system specifically includes an RFID tag, a tag reader / writer, a first Bluetooth terminal, a construction site patrol car, and a second Bluetooth terminal;

[0028] The system divides the construction site into multiple virtual areas;

[0029] Setting each point virtual area to include a tag reader and a first Bluetooth terminal, wherein the tag reader is in communication connection with the first Bluetooth terminal;

[0030] Install RFID tags on construction supplies;

[0031] The construction site patrol car patrols each virtual area according to the patrol route, and the second Bluetooth terminal is installed on the construction site patrol car; when the construction site patrol car enters the virtual area, the second Bluetooth terminal communicates with the first Bluetooth terminal in the virtual area.

[0032] Specifically, the system performs the following steps:

[0033] S1. When the construction consumables enter the current virtual area, the tag reader within the current virtual area reads the RFID tag on the construction consumables and writes the current location and entry time to the RFID tag;

[0034] When the construction consumables leave the current virtual area, the tag reader in the current virtual area reads the RFID tag on the construction consumables and writes the departure time into the RFID tag;

[0035] There are one or more RFID tags on the construction consumables, which is determined by the type of consumables.

[0036] Furthermore, the tag reader reads data from the RFID tag on the building consumables including: building consumables number, building consumables name, supplier number, supplier name, and transfer path;

[0037] S2. The tag reader reads the data on the RFID tag of the construction supplies and sends it to the first Bluetooth terminal installed in the same virtual area as the tag reader;

[0038] S3. The first Bluetooth terminal saves the data in the RFID tag on the construction consumables sent by the tag reader and performs data analysis to obtain data analysis results;

[0039] When the construction site patrol car enters the virtual area of ​​the current point, the first Bluetooth terminal sends the data in all RFID tags stored in it to the construction site patrol car;

[0040] The construction site patrol car patrols each point along the patrol route and collects multiple RFID tag data from the first Bluetooth terminal at each point;

[0041] Furthermore, a second Bluetooth terminal is installed on the construction site patrol car. When the construction site patrol car enters the point virtual area, the second Bluetooth terminal communicates with the first Bluetooth terminal in the point virtual area.

[0042] S4. The construction site patrol car dynamically adjusts its patrol route based on abnormal conditions of construction consumables in each virtual area.

[0043] S5. The construction site patrol car transmits the data collected from the first Bluetooth terminal in each virtual area to the material tracking platform, and the material tracking platform dynamically displays the construction consumables data in real time.

[0044] The beneficial effects of the present invention are as follows:

[0045] 1. The present invention adopts a combination of RFID and Bluetooth technologies to dynamically track batches of construction consumables. RFID communication enables information to be read even when the RFID tag is inside the construction consumables. Bluetooth technology can effectively avoid various communication instability or interference problems caused by other communication technologies such as WiFi on construction sites due to complex environments or poor network signals.

[0046] 2. The present invention determines whether the construction consumables are abnormal consumables or consumables of special concern based on the transfer path of the RFID tag, the number of batch construction consumables at each point, the residence time of the RFID tag at each point, and the transfer time of the RFID tag between each point, and adopts different processing methods to process the construction consumables, thereby improving the accuracy of tracking, judging, and processing consumables and improving the overall operating efficiency of the construction site.

[0047] 3. The present invention first determines whether there are any abnormalities in a batch of construction consumables based on the transfer path of the RFID tags. If no abnormalities are found, the construction consumables are then determined based on the number of RFID tags, the length of residence time, and the length of transfer time, effectively improving the efficiency of determining the status of construction consumables.

[0048] 4. This invention dynamically adjusts the inspection route of the patrol car on the construction site according to whether the construction consumables are of key concern, so that construction consumables that may pose risks can be inspected quickly and focused, thereby improving the accuracy of tracking construction consumables;

[0049] 5. In the present invention, the product of the number of times a construction site patrol car enters the virtual area of ​​a point and the MAC address of the first Bluetooth terminal at the point is used as the first key to encrypt the data; since the inspection path of the construction site patrol car changes dynamically, the number of times the construction site patrol car enters the virtual area of ​​the point is not easily obtained by outsiders. Therefore, this encryption method avoids the possibility of outsiders forging the first Bluetooth terminal data and sending it to the construction site patrol car, thereby reducing the possibility of outsiders committing illegal acts on construction consumables.

[0050] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above description and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0052] Figure 1 This is a structural diagram of a construction site material tracking system based on the combination of Bluetooth and RFID technology;

[0053] Figure 2 This is a flow chart of a construction site material tracking method based on the combination of Bluetooth and RFID technologies. DETAILED DESCRIPTION

[0054] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0055] In the description of the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0056] [Example 1]

[0057] The present invention proposes a construction site material tracking method based on the combination of Bluetooth and RFID technology, the method specifically comprising the following steps:

[0058] S1. When the construction consumables enter the current virtual area, the tag reader within the current virtual area reads the RFID tag on the construction consumables and writes the current location and entry time to the RFID tag;

[0059] When the construction consumables leave the current virtual area, the tag reader in the current virtual area reads the RFID tag on the construction consumables and writes the departure time into the RFID tag;

[0060] Furthermore, a batch of construction consumables may have one or more RFID tags, which is determined by the type of consumables.

[0061] Furthermore, the construction site is divided into multiple points according to the area, and each point is an area, namely the point virtual area;

[0062] For example, the overall space of the construction site is divided into four points A, B, C, and D according to the area. Each point corresponds to an area, that is, the point virtual area. The above four areas constitute the overall space of the construction site.

[0063] Furthermore, a tag reader and a first Bluetooth terminal are installed in each point virtual area;

[0064] The tag reader is capable of reading data from an RFID tag on a construction consumable material, and the tag reader is connected to the first Bluetooth terminal;

[0065] Furthermore, the tag reader reads data from the RFID tag on the building consumables including: building consumables number, building consumables name, supplier number, supplier name, and transfer path;

[0066] Each RFID tag corresponds to one piece of the above data; when a batch of construction consumables has multiple RFID tags, the batch of construction consumables corresponds to multiple pieces of the above data.

[0067] The transfer path is the time when the construction consumable enters and leaves the virtual area of ​​each point. The specific data format is: {[point 1, entry time, exit time], [point 2, entry time, exit time], ... [point i, entry time, exit time]};

[0068] For example, when a construction consumable enters point i+1, the number and entry time of point i+1 are written into the transfer path in the RFID tag, such as {[point 1, entry time, exit time], [point 2, entry time, exit time], … [point i, entry time, exit time], [point i+1, entry time]};

[0069] When the construction consumables leave point i+1, the time of leaving point i+1 is written into the transfer path in the RFID tag, such as {[point 1, entry time, departure time], [point 2, entry time, departure time], ... [point i, entry time, departure time], [point i+1, entry time, departure time]}.

[0070] When the construction consumables leave point i+1, the number of RFID tags with the same construction consumable number and the same supplier number is counted as the total number of construction consumables in the batch, and the total number is written to each RFID tag belonging to the same batch of construction consumables;

[0071] For example, for a batch of construction consumables, it contains 3 RFID tags, then the construction consumable numbers and supplier numbers in the 3 RFID tags are equal. When the construction consumables leave the point, the total number 3 is written into each of the 3 RFID tags of the batch of construction consumables.

[0072] S2. The tag reader reads the data on the RFID tag of the construction supplies and sends it to the first Bluetooth terminal installed in the same virtual area as the tag reader;

[0073] S3. The first Bluetooth terminal saves the data in the RFID tag on the construction consumables sent by the tag reader and performs data analysis to obtain data analysis results;

[0074] When the construction site patrol car enters the virtual area of ​​the current point, the first Bluetooth terminal sends the data in all RFID tags stored in it to the construction site patrol car;

[0075] The construction site patrol car patrols each point along the patrol route and collects multiple RFID tag data from the first Bluetooth terminal at each point;

[0076] Furthermore, a second Bluetooth terminal is installed on the construction site patrol car. When the construction site patrol car enters the point virtual area, the second Bluetooth terminal communicates with the first Bluetooth terminal in the point virtual area.

[0077] S4. The construction site patrol car dynamically adjusts its patrol route based on abnormal conditions of construction consumables in each virtual area.

[0078] S5. The construction site patrol car transmits the data collected from the first Bluetooth terminal in each virtual area to the material tracking platform, and the material tracking platform dynamically displays the construction consumables data in real time.

[0079] [Example 2]

[0080] On the basis of steps S1 to S5 of the first embodiment, in step S3, the first Bluetooth terminal saves the data in the RFID tag on the construction consumables sent by the tag reader and performs data analysis to obtain the data analysis results, which specifically further includes the following steps:

[0081] S31. The first Bluetooth terminal saves the data in the RFID tag on the construction consumables sent by the tag reader and obtains the transfer path information of each RFID tag;

[0082] The transfer path information of the RFID tag is a collection of the point numbers of all the points passed by the RFID tag from the time the RFID tag entered the construction site to the time the RFID tag arrived at the current point, in chronological order;

[0083] For example, if RFID tag A enters the construction site and reaches the current point, the points it passes through in chronological order are: point 3, point 1, and point 6. The transfer path information of the RFID tag is 3-1-6.

[0084] S32. The first Bluetooth terminal obtains the tag transfer path table stored locally in the first Bluetooth terminal, and compares the RFID tag transfer path stored in the tag transfer path table with the transfer path of the RFID tag obtained in step S31. If they are consistent, steps S34 to S36 are executed. If they are inconsistent, step S33 is executed.

[0085] Furthermore, the tag transfer path table is pre-stored in the first Bluetooth terminal at each location and is synchronously stored in the construction site patrol car;

[0086] The tag transfer path table stores the transfer path of each RFID tag, the length of stay at each point, the transfer time between each point, and the quantity of the construction consumables of the batch at each point.

[0087] S33. The first Bluetooth terminal determines that the batch of construction consumables corresponding to the RFID tag is abnormal, controls the alarm connected to the first Bluetooth terminal to sound an alarm, and upon receiving the alarm, the construction site inspection personnel proceed to the virtual area where the first Bluetooth terminal is located to conduct on-site verification of the batch of construction consumables.

[0088] If there is no abnormality after verification, the site inspection personnel modify the data content in the RFID tag and the data content in the first Bluetooth terminal according to the correct RFID tag information to eliminate the abnormal information;

[0089] If any abnormality is found after verification, the site inspection personnel will suspend the use of the construction consumables corresponding to the RFID tag.

[0090] S34. When the RFID tags of the batch of construction consumables leave the point, the first Bluetooth terminal summarizes the total number of RFID tags with the same construction consumable number and the same supplier number as the number of RFID tags of the batch of construction consumables entering the current point virtual area;

[0091] S35. The first Bluetooth terminal calculates the length of stay of each RFID tag at each point, and the transfer duration between points, based on each RFID tag;

[0092] Furthermore, the length of time the RFID tag stays at the location = the time the RFID tag leaves the location - the time the RFID tag enters the location;

[0093] Furthermore, the transfer time of the RFID tag between locations = the time the RFID tag enters location A - the time the RFID tag leaves location B; where the RFID tag leaves location B and enters location A;

[0094] S36. The first Bluetooth terminal performs data analysis based on the number of RFID tags of the batch of construction consumables entering the virtual area of ​​the current location, the residence time of the RFID tags at the location, the transfer time of the RFID tags between locations, and various loss parameters to obtain a data analysis result. The calculation formula for the data analysis is as follows:

[0095]

[0096] Among them, the λ n ,λ t ,λ z , are the first weight, the second weight, and the third weight respectively, where λ n >λ t >λ z ; N hi 、N qi are respectively the number of RFID tags in the batch of construction consumables to which the RFID tag belongs when the RFID tag is at the point corresponding to the i-th serial number in the transfer path, and the expected number of RFID tags in the batch of construction consumables to which the RFID tag belongs when the RFID tag is at the point corresponding to the i-th serial number in the transfer path stored in the tag transfer path table; T hi 、T qi are the duration of stay of the RFID tag at the point corresponding to the i-th serial number in the transfer path and the duration that the RFID tag should stay at the point corresponding to the i-th serial number in the transfer path in the tag transfer path table; Z hi 、Z qi are the transfer time of the RFID tag from the point corresponding to the i-1th serial number in the transfer path to the point corresponding to the i-th serial number in the transfer path, and the expected transfer time of the RFID tag from the point corresponding to the i-1th serial number in the transfer path to the point corresponding to the i-th serial number in the transfer path in the tag transfer path table; W is the analysis result value; d is the number of the current point; S ni 、S ti 、S zi They are respectively the loss parameter of the number of RFID tags in the batch of building consumables to which the RFID tag belongs when the RFID tag is at the point corresponding to the i-th serial number in the transfer path, the loss parameter of the residence time of the RFID tag at the point corresponding to the i-th serial number in the transfer path, and the loss parameter of the transfer time of the RFID tag from the point corresponding to the i-1th serial number in the tag transfer path to the point corresponding to the i-th serial number in the transfer path.

[0097] The above loss parameters are the maximum error parameters allowed for the quantity, residence duration, and transfer duration due to transportation damage or other factors.

[0098] For example, the number of RFID tags at a certain point is 5, the number of tags in the tag transfer path table is 6, and the loss parameter is 2. Then |5 - 6| = 1, and 1 is within the range of the loss parameter 2.

[0099] In the above formula, i = 1 to d represents the i-th serial number in the transfer path of the RFID tag.

[0100] For example, the actual transfer path of the RFID tag is: 2 - 1 - 6. Therefore, d = 3 in the formula, which means the transfer path of the RFID tag includes 3 point nodes. The first serial number in the transfer path of the RFID tag corresponds to point 2, the second serial number corresponds to point 1, and the third serial number corresponds to point 6. In the formula, when i = 1, T hi represents the residence duration of the RFID tag at the point corresponding to the first serial number in the transfer path (i.e., point 2), that is, the residence duration of the RFID tag at point 2.

[0101] The tag transfer path table prestores the expected quantity of each batch of building consumables at each point, the expected residence duration of each RFID tag at each point, and the expected transfer duration of each RFID tag from one point to the next point.

[0102] When W > R, the first Bluetooth terminal determines that the building consumables corresponding to the RFID tag are key - concerned consumables, controls the alarm connected to the first Bluetooth terminal to give an alarm. After receiving the alarm information, the site patrol personnel go to the virtual area of the point where the first Bluetooth terminal is located to conduct on - site verification of the building consumables, and the site patrol personnel send the RFID tag information corresponding to the key - concerned consumables to the site patrol vehicle.

[0103] The RFID tag information includes: the information of the batch of building consumables corresponding to the RFID tag, the number of the point where the RFID tag currently leaves, and the time when the RFID tag leaves the current point.

[0104] When W < R, the first Bluetooth terminal does not perform an alarm operation.

[0105] Furthermore, in step S3, the first Bluetooth terminal saves the data in the RFID tag on the building consumables sent by the tag reader and conducts data analysis to obtain a data analysis result. Specifically, it further includes the following steps:

[0106] The first Bluetooth terminal obtains the time T1 at which each RFID tag in the tag transfer path table stored in the first Bluetooth terminal arrives at the current point virtual area;

[0107] At the current moment T d >T1+T y When the first Bluetooth terminal determines that the construction consumables corresponding to the RFID tag are abnormal consumables, it controls the alarm connected to the first Bluetooth terminal to sound an alarm. After receiving the alarm information, the construction site inspection personnel go to the virtual area where the first Bluetooth terminal is located to conduct on-site verification of the construction consumables.

[0108] The T d is the current moment, T y is the preset threshold;

[0109] The T y It is set according to the actual scenario, such as 10 minutes to 30 minutes.

[0110] If there is no abnormality after verification, the site inspection personnel modify the data content in the RFID tag and the data content in the first Bluetooth terminal according to the correct RFID tag information to eliminate the abnormal information;

[0111] If any abnormality is found after verification, the site inspection personnel will suspend the use of the construction consumables corresponding to the RFID tag.

[0112] [Example 3]

[0113] On the basis of the second embodiment, the step S4 of the construction site patrol car dynamically adjusting the patrol path according to the abnormal conditions of the construction consumables in each virtual area at each point further includes the following steps:

[0114] S41. When the construction site patrol car receives the RFID tag information corresponding to the consumables of particular concern sent by the construction site inspection personnel, the construction site patrol car obtains the time required to complete the remaining inspection work according to the current patrol route.

[0115] S42. The patrol car calculates the number of the point at which the RFID tag corresponding to the construction consumables is reached at the end of the remaining inspection time.

[0116] Furthermore, the construction site patrol car determines the point number that the RFID tag corresponding to the construction consumables will reach when the construction site patrol car finishes the current remaining inspection work based on the duration of the current remaining inspection work, the time when the RFID tag in the RFID tag information received from the construction site inspection personnel leaves the current point, the transfer time of the RFID tag to the subsequent point in the tag transfer path table in the construction site patrol car, and the stay time at the subsequent point.

[0117] For example, the RFID tag leaves its current location at 10:00 AM, and the patrol car's remaining inspection time is 30 minutes. The RFID tag's next location is K, and the location after K is L. The RFID tag's transfer time from the current location to the next location K is 5 minutes, and its stay at K is 10 minutes. The RFID tag's transfer time from K to L is 10 minutes, and its stay at L is 30 minutes. Therefore, at the end of the patrol car's remaining inspection time, at 10:30 AM, the RFID tag's location is L.

[0118] S43. When the patrol car completes the current patrol path, the point number obtained in step S42 is used as the first inspection point of the next inspection path, and the remaining points are re-path-planned according to the distance from the first inspection point to form an adjusted inspection path;

[0119] When there are multiple construction consumables that are of particular concern, at the end of the current inspection period of the construction site patrol car, there are multiple point numbers reached by the RFID tags corresponding to the construction consumables of particular concern; when the construction site patrol car completes the current patrol route, the point number closest to the last point of the current inspection route completed by the construction site patrol car among the multiple point numbers obtained in step S42 is used as the first inspection point of the next inspection route, and the point numbers reached by the remaining RFID tags corresponding to the construction consumables of particular concern are re-path-planned according to the distance from the first inspection point; after completing the path planning, the point numbers that are not involved in the path planning are path-planned according to the distance from the last point of the planned path to form an adjusted inspection route.

[0120] [Example 4]

[0121] On the basis of the third embodiment, in step S3, when the construction site patrol car enters the current point virtual area, the first Bluetooth terminal sends the data in all RFID tags stored therein to the construction site patrol car, which specifically includes the following steps:

[0122] SA first Bluetooth terminal obtains the number of times the site patrol car enters the current point of the virtual area, and multiplies the number by the MAC address of the first Bluetooth terminal to form an encryption key, the data stored in all RFID tags of the first Bluetooth terminal is encrypted;

[0123] Furthermore, when the construction site patrol car enters the virtual area of ​​the point where the first Bluetooth terminal is located, the construction site patrol car increases the number of times corresponding to the first Bluetooth terminal in the point data table stored internally by 1; the first Bluetooth terminal increases the number of times the construction site patrol car enters stored internally by 1;

[0124] The point data table stored in the construction site patrol car includes each first Bluetooth terminal and the number of visits and MAC addresses corresponding to the first Bluetooth terminal.

[0125] SB. The first Bluetooth terminal transmits the encrypted data in the RFID tag to the construction site patrol car using Bluetooth communication;

[0126] SC. The construction site patrol car obtains the number and MAC address corresponding to the first Bluetooth terminal at the current point from the point data table stored internally, multiplies the MAC address and the number to obtain the first decryption key, and decrypts the received data.

[0127] [Example 5]

[0128] Based on the fourth embodiment, in step S5, the patrol car transmits the data collected from the first Bluetooth terminal in each virtual area to the material tracking platform, and the material tracking platform dynamically displays the construction consumables data in real time, specifically including:

[0129] On the material tracking platform, the virtual area of ​​each point is displayed according to the range of the virtual area of ​​each point, and the information of the construction consumables in the virtual area is dynamically displayed in the virtual area of ​​each point.

[0130] [Example 6]

[0131] The present invention also proposes a construction site material tracking system based on the combination of Bluetooth and RFID technology, wherein the system specifically includes an RFID tag, a tag reader / writer, a first Bluetooth terminal, a construction site patrol car, and a second Bluetooth terminal;

[0132] The system divides the construction site into multiple virtual areas;

[0133] Setting each point virtual area to include a tag reader and a first Bluetooth terminal, wherein the tag reader is in communication connection with the first Bluetooth terminal;

[0134] Install RFID tags on construction supplies;

[0135] The construction site patrol car patrols each virtual area according to the patrol route, and the second Bluetooth terminal is installed on the construction site patrol car; when the construction site patrol car enters the virtual area, the second Bluetooth terminal communicates with the first Bluetooth terminal in the virtual area.

[0136] Specifically, the system performs the following steps:

[0137] S1. When the construction consumables enter the current virtual area, the tag reader within the current virtual area reads the RFID tag on the construction consumables and writes the current location and entry time to the RFID tag;

[0138] When the construction consumables leave the current virtual area, the tag reader in the current virtual area reads the RFID tag on the construction consumables and writes the departure time into the RFID tag;

[0139] There are one or more RFID tags on the construction consumables, which is determined by the type of consumables.

[0140] Furthermore, the construction site is divided into multiple points according to the area, and each point is an area, namely the point virtual area;

[0141] For example, the overall space of the construction site is divided into four points A, B, C, and D according to the area. Each point corresponds to an area, that is, the point virtual area. The above four areas constitute the overall space of the construction site.

[0142] Furthermore, a tag reader and a first Bluetooth terminal are installed in each point virtual area;

[0143] The tag reader is capable of reading data from an RFID tag on a construction consumable material, and the tag reader is connected to the first Bluetooth terminal;

[0144] Furthermore, the tag reader reads data from the RFID tag on the building consumables including: building consumables number, building consumables name, supplier number, supplier name, and transfer path;

[0145] Each RFID tag corresponds to one piece of the above data; when a batch of construction consumables has multiple RFID tags, the batch of construction consumables corresponds to multiple pieces of the above data.

[0146] The transfer path is the time when the construction consumable enters and leaves the virtual area of ​​each point. The specific data format is: {[point 1, entry time, exit time], [point 2, entry time, exit time], ... [point i, entry time, exit time]};

[0147] For example, when a construction consumable enters point i+1, the number and entry time of point i+1 are written into the transfer path in the RFID tag, such as {[point 1, entry time, exit time], [point 2, entry time, exit time], … [point i, entry time, exit time], [point i+1, entry time]};

[0148] When the construction consumables leave point i+1, the time of leaving point i+1 is written into the transfer path in the RFID tag, such as {[point 1, entry time, departure time], [point 2, entry time, departure time], ... [point i, entry time, departure time], [point i+1, entry time, departure time]}.

[0149] When the construction consumables leave point i+1, the number of RFID tags with the same construction consumable number and the same supplier number is counted as the total number of construction consumables in the batch, and the total number is written to each RFID tag belonging to the same batch of construction consumables;

[0150] For example, for a batch of construction consumables, it contains 3 RFID tags, then the construction consumable numbers and supplier numbers in the 3 RFID tags are equal. When the construction consumables leave the point, the total number 3 is written into each of the 3 RFID tags of the batch of construction consumables.

[0151] S2. The tag reader reads the data on the RFID tag of the construction supplies and sends it to the first Bluetooth terminal installed in the same virtual area as the tag reader;

[0152] S3. The first Bluetooth terminal saves the data in the RFID tag on the construction consumables sent by the tag reader and performs data analysis to obtain data analysis results;

[0153] When the construction site patrol car enters the virtual area of ​​the current point, the first Bluetooth terminal sends the data in all RFID tags stored in it to the construction site patrol car;

[0154] The construction site patrol car patrols each point along the patrol route and collects multiple RFID tag data from the first Bluetooth terminal at each point;

[0155] Furthermore, a second Bluetooth terminal is installed on the construction site patrol car. When the construction site patrol car enters the point virtual area, the second Bluetooth terminal communicates with the first Bluetooth terminal in the point virtual area.

[0156] S4. The construction site patrol car dynamically adjusts its patrol route based on abnormal conditions of construction consumables in each virtual area.

[0157] S5. The construction site patrol car transmits the data collected from the first Bluetooth terminal in each virtual area to the material tracking platform, and the material tracking platform dynamically displays the construction consumables data in real time.

[0158] The beneficial effects of the present invention are as follows:

[0159] 1. The present invention adopts a combination of RFID and Bluetooth technologies to dynamically track batches of construction consumables. RFID communication enables information to be read even when the RFID tag is inside the construction consumables. Bluetooth technology can effectively avoid various communication instability or interference problems caused by other communication technologies such as WiFi on construction sites due to complex environments or poor network signals.

[0160] 2. The present invention determines whether the construction consumables are abnormal consumables or consumables of special concern based on the transfer path of the RFID tag, the number of batch construction consumables at each point, the residence time of the RFID tag at each point, and the transfer time of the RFID tag between each point, and adopts different processing methods to process the construction consumables, thereby improving the accuracy of tracking, judging, and processing consumables and improving the overall operating efficiency of the construction site.

[0161] 3. The present invention first determines whether there are any abnormalities in a batch of construction consumables based on the transfer path of the RFID tags. If no abnormalities are found, the construction consumables are then determined based on the number of RFID tags, the length of residence time, and the length of transfer time, effectively improving the efficiency of determining the status of construction consumables.

[0162] 4. This invention dynamically adjusts the inspection route of the patrol car on the construction site according to whether the construction consumables are of key concern, so that construction consumables that may pose risks can be inspected quickly and focused, thereby improving the accuracy of tracking construction consumables;

[0163] 5. In the present invention, the product of the number of times a construction site patrol car enters the virtual area of ​​a point and the MAC address of the first Bluetooth terminal at the point is used as the first key to encrypt the data; since the inspection path of the construction site patrol car changes dynamically, the number of times the construction site patrol car enters the virtual area of ​​the point is not easily obtained by outsiders. Therefore, this encryption method avoids the possibility of outsiders forging the first Bluetooth terminal data and sending it to the construction site patrol car, thereby reducing the possibility of outsiders committing illegal acts on construction consumables.

[0164] The foregoing description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be readily conceived by a person skilled in the art within the technical scope disclosed herein are intended to be encompassed within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A construction site material tracking method based on the combination of Bluetooth and RFID technology, characterized in that: The method specifically comprises the following steps: S1. When the construction consumables enter the current virtual area, the tag reader within the current virtual area reads the RFID tag on the construction consumables and writes the current location and entry time to the RFID tag; When the construction consumables leave the current virtual area, the tag reader in the current virtual area reads the RFID tag on the construction consumables and writes the departure time into the RFID tag; S2. The tag reader reads the data on the RFID tag of the construction supplies and sends it to the first Bluetooth terminal installed in the same virtual area as the tag reader; S3. The first Bluetooth terminal saves the data in the RFID tag on the construction consumables sent by the tag reader and performs data analysis to obtain data analysis results; When the construction site patrol car enters the virtual area of ​​the current point, the first Bluetooth terminal sends the data in all RFID tags stored in it to the construction site patrol car; The construction site patrol car patrols each point along the patrol route and collects multiple RFID tag data from the first Bluetooth terminal at each point; S4. The construction site patrol car dynamically adjusts its patrol route based on abnormal conditions of construction consumables in each virtual area. S5. The patrol car transmits the data collected from the first Bluetooth terminal in each virtual area to the material tracking platform, which dynamically displays the construction material data in real time. Wherein, step S3 specifically includes the following steps: S31. The first Bluetooth terminal saves the data in the RFID tag on the construction consumables sent by the tag reader and obtains the transfer path information of each RFID tag; The transfer path information of the RFID tag is a collection of the point numbers of all the points passed by the RFID tag from the time the RFID tag entered the construction site to the time the RFID tag arrived at the current point, in chronological order; S32. The first Bluetooth terminal obtains the tag transfer path table stored locally in the first Bluetooth terminal, and compares the RFID tag transfer path stored in the tag transfer path table with the transfer path of the RFID tag obtained in step S31. If they are consistent, steps S34 to S36 are executed. If they are inconsistent, step S33 is executed. S33. The first Bluetooth terminal determines that the batch of construction consumables corresponding to the RFID tag is abnormal, controls the alarm connected to the first Bluetooth terminal to sound an alarm, and upon receiving the alarm, the construction site inspection personnel proceed to the virtual area where the first Bluetooth terminal is located to conduct on-site verification of the batch of construction consumables. If there is no abnormality after verification, the site inspection personnel modify the data content in the RFID tag and the data content in the first Bluetooth terminal according to the correct RFID tag information to eliminate the abnormal information; If any abnormality is found after verification, the site inspection personnel will suspend the use of the construction consumables corresponding to the RFID tag; S34. When the RFID tags of the batch of construction consumables leave the point, the first Bluetooth terminal summarizes the total number of RFID tags with the same construction consumable number and the same supplier number as the number of RFID tags of the batch of construction consumables entering the current point virtual area; S35. The first Bluetooth terminal calculates the length of stay of each RFID tag at each point, and the transfer duration between points, based on each RFID tag; S36. The first Bluetooth terminal performs data analysis based on the number of RFID tags of batches of construction consumables entering the virtual area of ​​the current location, the length of time the RFID tags stay at the location, the length of time the RFID tags are transferred between locations, and various loss parameters to obtain data analysis results; Wherein, in step S36, the calculation formula of the data analysis is as follows: Among them, the λ n ,λ t ,λ z are the first weight, the second weight, and the third weight respectively, where λ n >λ t >λ z ; N hi 、N qi are respectively the number of RFID tags in the batch of construction consumables to which the RFID tag belongs when the RFID tag is at the point corresponding to the i-th serial number in the transfer path, and the expected number of RFID tags in the batch of construction consumables to which the RFID tag belongs when the RFID tag is at the point corresponding to the i-th serial number in the transfer path stored in the tag transfer path table; T hi 、T qi are the duration of stay of the RFID tag at the point corresponding to the i-th serial number in the transfer path and the duration that the RFID tag should stay at the point corresponding to the i-th serial number in the transfer path in the tag transfer path table; Z hi 、Z qi are the transfer time of the RFID tag from the point corresponding to the i-1th serial number in the transfer path to the point corresponding to the i-th serial number in the transfer path, and the expected transfer time of the RFID tag from the point corresponding to the i-1th serial number in the transfer path to the point corresponding to the i-th serial number in the transfer path in the tag transfer path table; W is the analysis result value; d is the number of the current point; S ni 、S ti 、S zi They are respectively the loss parameter of the number of RFID tags in the batch of building consumables to which the RFID tag belongs when the RFID tag is at the point corresponding to the i-th serial number in the transfer path, the loss parameter of the residence time of the RFID tag at the point corresponding to the i-th serial number in the transfer path, and the loss parameter of the transfer time of the RFID tag from the point corresponding to the i-1-th serial number in the tag transfer path to the point corresponding to the i-th serial number in the transfer path; The tag transfer path table pre-stores the required quantity of each batch of construction consumables at each location, the required length of time each RFID tag should stay at each location, and the required length of time each RFID tag should transfer from one location to the next. Among them, in step S3, when the construction site patrol car enters the current point virtual area, the first Bluetooth terminal sends the data in all RFID tags stored in it to the construction site patrol car, which specifically includes the following steps: SA first Bluetooth terminal obtains the number of times the site patrol car enters the current point of the virtual area, and multiplies the number by the MAC address of the first Bluetooth terminal to form an encryption key, the data stored in all RFID tags of the first Bluetooth terminal is encrypted; When the construction site patrol car enters the virtual area of ​​the point where the first Bluetooth terminal is located, the construction site patrol car increases the number of times corresponding to the first Bluetooth terminal in the point data table stored internally by 1; the first Bluetooth terminal increases the number of times the construction site patrol car enters stored internally by 1; The point data table stored in the construction site patrol car includes each first Bluetooth terminal and the number of accesses and MAC addresses corresponding to the first Bluetooth terminal; SB. The first Bluetooth terminal transmits the encrypted data in the RFID tag to the construction site patrol car using Bluetooth communication; SC. The construction site patrol car obtains the number and MAC address corresponding to the first Bluetooth terminal at the current point from the point data table stored internally, multiplies the MAC address and the number to obtain the first decryption key, and decrypts the received data.

2. According to the method for tracking construction site materials based on the combination of Bluetooth and RFID technology as claimed in claim 1, step S1 further comprises: A tag reader and a first Bluetooth terminal are installed in each point virtual area.

3. The method for tracking construction site materials based on the combination of Bluetooth and RFID technology according to claim 1, wherein step S1 further comprises: The tag reader is capable of reading data in the RFID tag on the construction consumable material, and the tag reader is connected to the first Bluetooth terminal; The tag reader reads the data in the RFID tag on the building consumables, including: building consumables number, building consumables name, supplier number, supplier name, and transfer path; The transfer path includes the times when the building consumables enter and leave the virtual areas of each point.

4. The construction site material tracking method based on the combination of Bluetooth and RFID technology according to claim 3 is characterized in that: Step S36 further includes: When W > R, the first Bluetooth terminal determines that the building consumables corresponding to the RFID tag are consumables requiring key attention, controls the alarm connected to the first Bluetooth terminal to give an alarm. After receiving the alarm information, the on-site inspection personnel at the construction site go to the virtual area of the point where the first Bluetooth terminal is located to conduct on-site verification of the building consumables, and the on-site inspection personnel at the construction site send the RFID tag information corresponding to the consumables requiring key attention to the construction patrol vehicle; The RFID tag information includes: the information of the batch of building consumables corresponding to the RFID tag, the number of the point where the RFID tag currently leaves, and the time when the RFID tag leaves the current point; When W < R, the first Bluetooth terminal does not perform an alarm operation.

5. The construction site material tracking method based on the combination of Bluetooth and RFID technology according to claim 4 is characterized in that: Step S3 further includes: The first Bluetooth terminal obtains the arrival time T1 of each RFID tag at the current virtual area of the point stored in the tag transfer path table of the first Bluetooth terminal; At the current moment T d >T1+T y When the first Bluetooth terminal determines that the construction consumables corresponding to the RFID tag are abnormal consumables, it controls the alarm connected to the first Bluetooth terminal to sound an alarm. After receiving the alarm information, the construction site inspection personnel go to the virtual area where the first Bluetooth terminal is located to conduct on-site verification of the construction consumables. The T d is the current moment, T y is the preset threshold; If there is no abnormality after verification, the on-site inspection personnel at the construction site modify the data content in the RFID tag and the data content in the first Bluetooth terminal according to the correct RFID tag information to eliminate the abnormal information; If an abnormality occurs after verification, the on-site inspection personnel at the construction site suspend the use of the building consumables corresponding to the RFID tag.

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