TW202001788A - Steel product warehouse management system and method of steel product warehouse menagement - Google Patents

Abstract

A steel product warehouse management system includes an overhead crane grabber, a radio frequency emitter, a radio frequency receiver and a control platform. The radio frequency emitter is disposed on the overhead crane grabber and is configured to emit an RFID signal to steel products. The radio frequency receiver is disposed on the overhead crane grabber and is configured to read RFID response signals of RFID transponders on the steel products before the overhead crane grabber grabs one of the steel products to obtain RSSI values and reading counts respectively corresponding to the steel products based the RFID response signals corresponding to the steel products. The control platform is configured to determine an identified steel product of the steel products based on comparison results of the RSSI values and the reading counts.

Description

Steel product storage management system and steel product storage management method

The object of the present invention is to provide a steel product storage management system and a steel product storage management method.

Before the introduction of automatic management, the steel product storage management system needs to manually store, identify, and transport steel products, which is not only time-consuming, but also easy to cause industrial safety problems. After automating the steel storage management system, the operation time is greatly shortened, and the work safety problems that may arise due to manual operations are avoided. For an automated steel storage management system, radio frequency identification technology can be used to attach radio frequency identification tags to each steel product, and steel identification can be performed by sensing the radio frequency identification response signal sent by the radio frequency identification tag. However, the radio frequency identification technology must take into account the identification error problem that may be caused by multiple radio frequency identification tags simultaneously sending out radio frequency identification response signals or other factors.

The purpose of the present invention is to provide a steel product storage management system and a method thereof, which can accurately identify the steel products gripped by the crane crane, thereby improving the efficiency of the steel product storage management.

According to the above objective, the present invention proposes a steel product storage management system, which includes a crane crane, a radio frequency transmitter, a radio frequency receiver and a control platform. The radio frequency transmitter is arranged on the crane crane, which is used to send radio frequency identification signals to multiple steel products. The radio frequency receiver is installed on the crane crane, which is used to read the first radio frequency identification response signal sent by the radio frequency identification transponder on each of these steel products before the crane crane clamps the steel products. And based on the first radio frequency identification response signals corresponding to the steel products, the first received signal strength indicator (RSSI) corresponding to the steel products and the first reading times corresponding to the steel products are obtained . The control platform is used to perform the following operations: compare the first received signal strength representation value corresponding to these steel products to obtain the first received signal strength representation value comparison result; compare the first reading times corresponding to these steel products to obtain The comparison result of the first reading times; and the identification of the identified steel products among the steel products based on the comparison result of the first received signal strength indication value.

According to an embodiment of the present invention, the radio frequency receiver is used to read the second radio frequency identification response signal sent by the radio frequency identification transponder on each of these steel products when the steel crane clamps the steel products, and based on these The second radio frequency identification response signal corresponding to the steel product obtains the second received signal strength representation value corresponding to these steel products and the second reading times corresponding to these steel products respectively, and the control platform is further used to perform the following operations: Comparing the second received signal strength representation values corresponding to these steel products to obtain a second received signal strength representation value comparison result; comparing the second reading times corresponding to these steel products to obtain a second reading number comparison result; and based on The comparison result of the value of the second received signal strength and the comparison result of the second reading times determine whether the steel product clamped by the crane crane is an identifying steel product.

According to yet another embodiment of the present invention, the above-mentioned steel product storage management system further includes a positioning sensor, which is used to sense whether the crane crane clamps any steel products to obtain a positioning sensing signal, so that the control platform is based on positioning The sensing signal is compared with the first received signal strength indication value corresponding to these steel products and the first reading times, respectively, or the second received signal strength indication value corresponding to these steel products is compared with the second reading times, respectively.

According to yet another embodiment of the present invention, the above-mentioned positioning sensor includes a load cell.

According to yet another embodiment of the present invention, the steel product storage management system further includes a notification unit for generating a notification message based on the comparison result of the first received signal strength indication value and the comparison result of the first reading times.

According to yet another embodiment of the present invention, the radio frequency transmitter and the radio frequency receiver are respectively disposed on the inner surface and the outer surface of the crane crane.

According to the above purpose, the present invention also proposes a steel product storage management method, which includes: sending radio frequency identification signals to a plurality of steel products; reading the radio frequency identification on each of these steel products before the crane crane clamps the steel products The first radio frequency identification response signal sent by the transponder in response to the radio frequency identification signal; based on the first radio frequency identification response signal corresponding to these steel products, the first received signal strength representation value corresponding to these steel products is obtained and corresponding to these steel products respectively The first reading times of the products; compare the first received signal strength representation values corresponding to these steel products to obtain the first received signal strength representation value comparison results; compare the first reading times corresponding to these steel products to obtain The comparison result of the first reading times; and identifying the identified steel products among the steel products based on the comparison result of the first received signal strength indication value and the comparison result of the first reading times.

According to an embodiment of the present invention, the above-mentioned radio frequency identification signal is sent by a radio frequency transmitter provided on the crane crane.

According to yet another embodiment of the present invention, the above steel product storage management method further includes: when the steel product is picked up by the crane crane clamp, reading the radio frequency identification transponder on each of these steel products in response to the radio frequency identification signal The second radio frequency identification response signal; based on the second radio frequency identification response signal corresponding to these steel products, the second received signal strength representation value corresponding to these steel products and the second reading times corresponding to these steel products are obtained; compare corresponding to this The second received signal strength representation value of some steel products to obtain a comparison result of the second received signal strength representation value; comparing the second reading times corresponding to these steel products to obtain a second reading number comparison result; 2. The result of the comparison of the value of the received signal strength and the comparison result of the second reading times determines whether the steel product clamped by the crane crane is an identifying steel product.

According to yet another embodiment of the present invention, the above steel product storage management method further includes using a positioning sensor to sense whether the crane crane clamps any steel products, based on which it is determined that each of these steel products is sent by the radio frequency identification transponder The signal of is the first radio frequency identification response signal or the second radio frequency identification response signal.

100‧‧‧Steel warehouse management system

110‧‧‧Crane device

111‧‧‧Crane crane clamp

111A‧‧‧Left clip

111B‧‧‧Right clip

112‧‧‧Lifting arm

113‧‧‧ Lifting drive

114‧‧‧ Translation drive

115‧‧‧slide

120‧‧‧Control platform

132, 132A, 132B ‧‧‧ RF transmitter

134, 134A, 134B ‧‧‧ RF receiver

200、300‧‧‧Steel warehouse management method

S210, S220, S230, S240, S250, S260, S310, S320, S330, S340, S350

S, S1, S2, S3 ‧‧‧ steel products

TAG, TAG1, TAG2, TAG3 ‧‧‧ RF identification transponder

For a more complete understanding of the embodiment and its advantages, reference is now made to the following description made in conjunction with the accompanying drawings, in which: [FIG. 1] is a schematic diagram of a steel storage management system according to an embodiment of the present invention; [FIG. 2] is An example of configuring a radio frequency transmitter and a radio frequency receiver on a single gripper; [Figure 3] is an example of configuring a radio frequency transmitter and a radio frequency receiver on each gripper; [Figure 4] is a crane gripper gripper Example before steel products; [Figure 5] is a flowchart of a steel product storage management method according to an embodiment of the present invention; [Figure 6] is an example when a crane crane grips a steel product; and [Figure 7] is based on A flowchart of a steel product warehouse management method according to an embodiment of the invention.

The embodiments of the present invention are discussed in detail below. However, it can be understood that the embodiments provide many applicable inventive concepts that can be implemented in a variety of specific contents. The specific embodiments discussed are for illustration only and are not intended to limit the scope of the invention.

Please refer to FIG. 1, which is a schematic diagram of a steel product storage management system 100 according to an embodiment of the present invention. The steel product storage management system 100 may be installed in a warehouse storing steel products S, which is used to manage the entry and exit of the steel products S and the storage location, etc., but is not limited thereto. The steel product storage management system 100 includes a crown block device 110, a control platform 120, a radio frequency transmitter 132 and a radio frequency receiver 134. The crown block device 110 is used to transport the steel product S according to the operation instructions of the control platform 120. The control platform 120 may be a device with a processor such as a computer, but is not limited thereto. Each steel product S can be provided with a corresponding radio frequency identification transponder (transponder). When the radio frequency transmitter 132 emits a radio frequency identification signal, the radio frequency identification transponder (RFID transponder) TAG on the steel product S can be triggered by the radio frequency identification signal to transmit the radio frequency identification response signal. The radio frequency identification transponder TAG may be a radio frequency identification tag (RFID tag), which can be attached to the inner surface or the outer surface of the steel product S, but is not limited thereto. The radio frequency identification transponder TAG can store the corresponding steel product identification code and radio frequency identification tag identification code, so that the radio frequency receiver 134 can identify which steel product is the radio frequency identification transponder. The radio frequency receiver 134 is used to receive the radio frequency identification response signal sent by the radio frequency identification transponder on the steel product S. In addition, the radio frequency receiver 134 further transmits data to the control platform 120 based on the reception status of the radio frequency identification response signal, so that the control platform 120 controls the operation of the crown block device 110 accordingly. The RF receiver 134 may be a dual-port, dual-port, four-port or multi-port antenna reader, which can be configured according to the environment and operation requirements of the steel product storage management system 100. The connection between the control platform 120 and the radio frequency transmitter 132 and the radio frequency receiver 134 may be an RS232/RS422/RS485 communication interface connection, a wired network connection, a wireless network connection, or a ZigBee network connection, but is not limited thereto.

The crown block device 110 includes a crown block 111, a lifting arm 112, a lifting driving section 113, a translation driving section 114, and a slide rail 115. The overhead crane clamp 111 is used to clamp the steel product S, and it has a left clamping piece 111A and a right clamping piece 111B, and both the left clamping piece 111A and the right clamping piece 111B have hooks on the inside, which can bear The weight of the steel product S in order to avoid the steel product S being caught falling off when moving. The elevating arm 112 can be driven by the elevating drive unit 113 to expand and contract, so that the crane crane 111 moves in the up-down direction (ie, the Z-axis direction). The translation drive unit 114 controls the crane block 111 and the elevating arm 112 to move along the longitudinal direction of the slide rail 115 (that is, in the X-axis direction). In addition, in some embodiments, the crane crane 111, the elevating arm 112, and the slide rail 115 are further movable in the direction of the horizontal and vertical slide rail 115 (ie, the Y-axis direction).

Before clamping the steel product S, the control platform 120 can control the left clamping piece 111A and the right clamping piece 111B to move outward, so that the distance between the left clamping piece 111A and the right clamping piece 111B (ie, the left clamping piece 111A The distance between the hook of the right hook and the hook of the right clamping part 111B) is larger than the width of the steel product S. Then, the control platform 120 controls the crown crane 111 to move to a position where the steel product S can be gripped, and then controls the left gripper 111A and the right gripper 111B to move inward until the hook of the left gripper 111A and The distance between the hooks of the right gripper 111B is smaller than the width of the steel product S. After that, the control platform 120 controls the elevating drive unit 113 to contract and drive the elevating arm 112 to pull up the crane crane 111, and then controls the crane crane 110 to move horizontally to achieve the transportation of the steel product S .

In some embodiments, the steel product storage management system 100 includes a positioning sensor (not shown), which is used to sense whether the steel product S is clamped by the crane crane 111 to obtain a positioning sensing signal, so that The steel product storage management system 100 performs corresponding operations according to the positioning sensing signal. The positioning sensor may be provided on the crane crane 111 or other sensors that can sense the position of the crane crane clamp to take the steel product S. In addition, the positioning sensor may be a load cell, a proximity sensor, a photoelectric sensor, or other sensors that can sense whether the crane S clamp has picked up the steel product S by any principle.

In addition, in some embodiments, the steel product storage management system 100 may further include a notification unit (not shown), which is used to immediately notify the steel product storage management system 100 of the operation settings, processes, and events, but is not limited to this , So that on-site personnel can carry out corresponding operations and processing accordingly.

The radio frequency transmitter 132 and the radio frequency receiver 134 of the embodiment of the present invention may be disposed at different positions of the left clamping piece 111A or the right clamping piece 111B according to the environment in which the steel product storage management system 100 is located. For example, as shown in FIG. 2, the radio frequency transmitter 132 and the radio frequency receiver 134 are respectively disposed on the inner surface and the outer surface of the left gripper 111A of the crane clamp 111. Further, the RF transmitter 132 is disposed on the lower oblique side surface of the hook of the left clamping member 111A, and the RF receiver 134 is disposed on the lower outer surface of the left clamping member 111A, to avoid clamping and handling steel During the process of the product S, it was collided and interfered with other elements on the crown block device 110. The radio frequency transmitter 132 and/or the radio frequency receiver 134 can be locked on the left clamping piece 111A by using components such as screws and washers to prevent the radio frequency transmitter 132 and/or the radio frequency receiver 134 from being affected by vibration Fall off. In some embodiments, the RF transmitter 132 and/or the RF receiver 134 may be covered with a buffer (such as sponge, wool felt, or other buffer that does not affect the functions of the RF transmitter 132 and the RF receiver 134) to Avoid direct collision of crane crane clamps with steel product S. In other embodiments, the RF transmitter 132 and the RF receiver 134 can also be integrated into a single module.

The configuration of the radio frequency transmitter and the radio frequency receiver in the embodiments of the present invention includes but is not limited to the architecture shown in FIG. 2. For example, the radio frequency transmitter 132 and the radio frequency receiver 134 can be changed to be disposed on the inner surface and the outer surface of the right gripper 111B of the crane crane 111, respectively. Alternatively, a plurality of radio frequency transmitters and a plurality of radio frequency receivers may be provided on the crane crane 111. In other embodiments, as shown in FIG. 3, radio frequency transmitters 132A, 132B and radio frequency receivers 134A, 134B are provided on the crane clamp 111 of the crane, wherein the radio frequency transmitter 132A and the radio frequency receiver 134A are respectively located in the left clamp The inside and outside surfaces of the pickup 111A, and the RF transmitter 132B and the RF receiver 134B are located on the inside and outside surfaces of the right clamping member 111B, respectively.

FIG. 4 is an example of steel product storage management system 100 according to an embodiment of the present invention, and FIG. 5 is a flowchart of a steel product storage management method 200 according to an embodiment of the present invention. The steel product storage management method 200 can be used in the steel product storage management system 100 of FIG. 1 or other similar systems. For the convenience of explanation, the following description of the steel product storage management method 200 takes the steel product storage management performed by the steel product storage management system 100 of FIG. 4 as an example, wherein the steel products S1~S3 have radio frequency identification transponders TAG1~TAG3, Moreover, the radio frequency identification transponders TAG1~TAG3 respectively store the identification data of the steel products S1~S3, but the embodiments of the present invention are not limited thereto. In addition, the state shown in FIG. 4 is that the crane crane 111 is close to the steel products S1~S3 but has not gripped any steel products S1~S3.

The operation of the steel product storage management method 200 is as follows. First, the fixed crane 111 gradually moves toward the steel products S1~S3, and in step S210, the radio frequency transmitter 132 sends a radio frequency identification signal to the steel products S1~S3 to trigger the radio frequency identification transponders TAG1~TAG3 and make the radio frequency The identification transponders TAG1~TAG3 respond to the radio frequency identification signals and send out first radio frequency identification response signals respectively. The frequency and strength of the radio frequency identification signal can be set according to the environment of the steel product storage management system 100, the type of the steel products S1~S3, and/or the sensitivity of the radio frequency identification transponders TAG1~TAG3.

Next, proceed to step S220, before the crane crane 111 picks up any steel product S1~S3, the RF receiver 134 reads the radio frequency identification transponders TAG1~TAG3 on the steel products S1~S3 in response to the radio frequency identification signal and sends out RFID response signal.

Then, in step S230, the RF receiver 134 obtains the first received signal strength indication value and the first reading frequency corresponding to the steel products S1~S3 based on the received RF identification response signal.

Next, step S240 is performed to compare the first received signal strength representation values corresponding to the steel products S1 to S3, respectively, to obtain a first received signal strength representation value comparison result.

Afterwards, step S250 is performed to compare the first reading times corresponding to the steel product S1 respectively to obtain a comparison result of the first reading times.

Before step S240 and step S250, the control platform 120 may sort the first received signal strength indication values and the first reading times corresponding to the steel products S1~S3, respectively, and sort the sorted first received signal strength indication values and The first reading times are stored in the database to be used as a comparison reference for the subsequent process of clamping steel products, and are used for background analysis and other system applications.

Next, step S260 is performed, based on the comparison result of the first received signal strength indication value and the comparison result of the first reading times, to identify the identified steel products among the steel products. The information for identifying steel products can be stored in the database to be used as the basis for identifying steel products in the subsequent process of clamping steel products.

The steel product storage management method 200 can be triggered by a radio frequency identification response signal. For example, if the received signal strength representation value of the RF identification response signal sensed by the RF receiver 134 is greater than a predetermined intensity threshold, the RF receiver 134 sends a signal to the control platform 120 to trigger the control platform 120 to perform steel storage management Method 200. In this way, the occurrence of recognition errors can be avoided, and the signal processing speed of the control platform 120 can be accelerated.

The advantage of the steel product storage management method 200 is at least that during the movement of the control platform 120, the radio frequency identification response signal sent by the radio frequency identification transponder on the steel product is read in advance and the crane clamp 111 of the crane is pre-identified The steel product is beneficial to know the information of the steel product identification in advance before the control platform 120 picks up the steel product, so it can effectively improve the efficiency of steel product storage management.

Further, FIG. 6 is another example of steel storage management system 100 according to an embodiment of the present invention for steel storage management, and FIG. 7 is a flowchart of a steel storage management method 300 according to an embodiment of the present invention. The steel product storage management method 300 can be used in the steel product storage management system 100 of FIG. 1 or other similar systems, and can be performed after the steel product storage management method 200 is completed. The dividing point between the steel product storage management method 200 and the steel product storage management method 300 is whether the positioning sensor 120 senses that the crane crane 111 has clamped the steel product. If the positioning sensor 120 senses that the crane crane 111 has gripped the steel product, the steel product storage management method 200 is ended and the steel product storage management method 300 is performed. For the convenience of explanation, the following description of the steel product storage management method 300 takes the steel product storage management performed by the steel product storage management system 100 of FIG. 6 as an example, and the steel products gripped by the crane crane 111 are steel products Take S1 as an example.

The operation of the steel product storage management method 300 is as follows. First, proceed to step S310, when the crane crane 111 grips the steel product S1, the radio frequency transmitter 132 sends a radio frequency identification signal to the steel products S1~S3 to trigger the radio frequency identification transponders TAG1~TAG3 to respond to the radio frequency identification signal and send out The second radio frequency identification response signal, and the radio frequency receiver 134 reads the radio frequency identification response signals respectively sent by the radio frequency identification transponders TAG1~TAG3 on the steel products S1~S3.

Then, in step S320, the radio frequency receiver 134 obtains a second received signal strength indication value and a second reading frequency corresponding to the steel products S1~S3, respectively, based on the received radio frequency identification response signal. In some embodiments, a threshold of reading times may be preset. If there are two or more second reading times greater than the threshold of reading times, the control platform 120 determines that the system is abnormal, and stops the operation of the crown block device 110 and The control notification unit (not shown in the figure) issues a notification message to promptly prompt the on-site personnel to perform corresponding processing, such as checking whether more than two radio frequency identification transponders are attached to the clamped steel product.

Next, step S330 is performed to compare the second received signal strength representation values corresponding to the steel products S1 to S3, respectively, to obtain a second received signal strength representation value comparison result.

After that, step S340 is performed to compare the second reading times corresponding to the steel products S1 to S3, respectively, to obtain a comparison result of the second reading times.

In detail, the control platform 120 can separately determine the number of the first The second received signal strength indication value and the second reading times are used to assign weight values, and the second received signal strength indication value comparison result and the second received signal strength indication value are respectively obtained based on the second received signal strength indication value and the second reading times after the weight value assignment is performed Comparison result of the second reading times.

Before step S330 and step S340, the control platform 120 can sort the second received signal strength indication values and the second reading times corresponding to the steel products S1~S3, respectively, and sort the sorted second received signal strength indication values and The second reading frequency is stored in the database.

Next, step S350 is performed, based on the comparison result of the second received signal strength indication value and the comparison result of the second reading count to determine whether the steel product S1 clamped by the crane crane is an identified steel product. If at least one of the comparison result of the second received signal strength indication value and the comparison result of the second reading times matches the identified steel product, the steel product S1 clamped by the crane crane clamp is identified as the identified steel product. Conversely, if both the comparison result of the second received signal strength indication value and the comparison result of the second reading times do not match the identified steel product, and the second reception signal strength indication value comparison result matches the comparison result of the second reading times, then The control platform 120 discriminates the newly identified steel product according to the comparison result of the second received signal strength representation value and the comparison result of the second reading times, and decides that the steel product S1 clamped by the crane block 111 is the newly identified steel product.

Similarly, the control platform 120 can sort the second received signal strength indication values and the second reading times corresponding to the steel products S1~S3, respectively, and sort the sorted second received signal strength indication values and the second reading times And the determination result of step S360 is stored in the database, which is used as a comparison reference for the subsequent process of gripping steel products, and is used for background analysis and other system applications.

Through the steel product storage management method 300, after the steel product is clamped by the crane crane 111, it can be confirmed whether the identified steel product in the pre-reading stage is the steel product clamped by the crane crane 111, so As a result, the accuracy of steel identification can be further improved.

Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to the scope defined in the appended patent application.

100‧‧‧Steel warehouse management system

110‧‧‧Crane device

111‧‧‧Crane crane clamp

111A‧‧‧Left clip

111B‧‧‧Right clip

112‧‧‧Lifting arm

113‧‧‧ Lifting drive

114‧‧‧ Translation drive

115‧‧‧slide

120‧‧‧Control platform

132‧‧‧RF transmitter

134‧‧‧RF receiver

S‧‧‧Steel

TAG‧‧‧RF identification transponder

Claims (10)

A steel product storage management system, comprising: a crane for one day; an RF transmitter, which is arranged on the crane for the crane; the radio frequency transmitter is used to send a radio frequency identification signal to a plurality of steel products; a radio frequency receiver, set On the crane crane clamp, the radio frequency receiver is used to read the radio frequency identification transponder (transponder) on each of the steel products before the crane crane clamps one of the steel products A first radio frequency identification response signal, and based on the first radio frequency identification response signal corresponding to the steel products, the first received signal strength indicator (RSSI) corresponding to the steel products and the corresponding values are obtained respectively The first reading times of steel products; and a control platform for performing the following operations: comparing the first received signal strength representation values corresponding to some steel products to obtain a comparison result of the first received signal strength representation values; The first reading times of the steel products should be obtained to obtain a comparison result of the first reading times; and the steel products can be discriminated based on the comparison result of the first received signal strength indication value and the comparison result of the first reading times One is to identify steel products. The steel product storage management system as described in item 1 of the patent application scope, wherein the radio frequency receiver is used to read the radio frequency on each of the steel products when the crane crane grips one of the steel products The identification transponder sends out a second radio frequency identification response signal, and based on the second radio frequency identification response signals of the steel products, a second received signal strength indication value corresponding to the steel products and a corresponding steel signal corresponding to the steel products are obtained. Two reading times, and the control platform is further used to perform the following operations: compare the second received signal strength representation values corresponding to the steel products to obtain a second received signal strength representation value comparison result; compare the corresponding steel products The second reading times to obtain a second reading times comparison result; and based on the second received signal strength representation value comparison result and the second reading times comparison result to determine the steel clamped by the crane crane Whether the product is the identified steel product. The steel product storage management system as described in item 2 of the patent application scope further includes: a positioning sensor for sensing whether the crane crane clamps any steel products to obtain a positioning sensing signal, so that The control platform compares the first received signal strength indication value corresponding to the steel products and the first reading times respectively according to the positioning sensing signal or the second received signal strength indication value and the second corresponding to the steel products respectively Comparison of reading times. The steel product storage management system as described in item 3 of the patent application scope, wherein the positioning sensor includes a load cell. The steel storage management system as described in item 1 of the patent application scope further includes: a notification unit for generating a notification message based on the comparison result of the first received signal strength indication value and the comparison result of the first reading times. The steel product storage management system as described in item 1 of the patent application scope, wherein the radio frequency transmitter and the radio frequency receiver are respectively disposed on an inner surface and an outer surface of the crane crane. A steel product storage management method, comprising: sending a radio frequency identification signal to a plurality of steel products; reading a radio frequency identification on each of these steel products one day before the crane clamp grips one of the steel products The transponder sends out a first radio frequency identification response signal in response to the radio frequency identification signal; based on the first radio frequency identification response signal corresponding to the steel products, the value of the first received signal strength corresponding to the steel products is obtained ( received signal strength indicator; RSSI) and the first reading times corresponding to some steel products respectively; comparing the first received signal strength representation values corresponding to these steel products to obtain a comparison result of the first received signal strength representation values; comparison Corresponding to the first reading times of the steel products to obtain a first reading time comparison result; and judging the steel products based on the first received signal strength indication value comparison result and the first reading frequency comparison result One of them identifies steel products. The steel product warehouse management method as described in item 7 of the patent application scope, wherein the radio frequency identification signal is sent by a radio frequency transmitter installed on the crane crane. The steel product storage management method as described in item 7 of the patent application scope further includes: reading one of the steel products when the crane crane grips one of the steel products The device responds to the second radio frequency identification response signal sent by the radio frequency identification signal; based on the second radio frequency identification response signal corresponding to the steel products, the second received signal strength indication value corresponding to the steel products and the steel corresponding to the steel products are obtained The second reading times of the products; compare the second received signal strength representation values corresponding to the steel products to obtain a second received signal strength representation value comparison result; compare the second reading times corresponding to the steel products, to A second reading frequency comparison result is obtained; and based on the second received signal strength indication value comparison result and the second reading frequency comparison result, it is determined whether the steel product clamped by the crane crane is the identified steel product. The steel product storage management method as described in item 9 of the patent application scope further includes: using a positioning sensor to sense whether the crane crane clamps any steel products, according to which each steel product is identified The signal sent by the radio frequency identification transponder is the first radio frequency identification response signal or the second radio frequency identification response signal.

Images