A detection system and method for detecting abnormality of a tower crane monitoring system magnification setting

Abstract

The present application relates to the technical field of construction machinery, and particularly relates to a detection system and method for abnormality of a tower crane monitoring system magnification setting, comprising a first measurement assembly, a second measurement assembly and a controller, the first measurement assembly is arranged between a hoist and a luffing trolley, and is used for real-time counting of the length of the steel wire rope released or retracted by the hoist, the second measurement assembly is arranged on the luffing trolley, and is used for real-time counting of the distance of the upward or downward movement of a hook, the controller is electrically connected with the first measurement assembly and the second measurement assembly respectively, and is used for collecting and processing and analyzing the information counted by the first measurement assembly and the second measurement assembly, comparing the absolute value of the difference between the ratio of the length of the steel wire rope released by the hoist and the corresponding distance of the downward movement of the hook or the ratio of the length of the steel wire rope retracted by the hoist and the corresponding distance of the upward movement of the hook with the set magnification and 1, and determining the magnification setting state of the tower crane detection system based on the comparison result.

Description

Technical Field

[0001] This invention relates to the field of construction machinery technology, and in particular to a detection system and method for abnormal multiplier settings in a tower crane monitoring system. Background Technology

[0002] In the existing technology, a tower crane has a counterweight boom and a lifting boom on both sides of the tower body. The counterweight boom is equipped with a counterweight and a hoisting mechanism, which includes a winch for releasing or winding the wire rope. On the other side of the tower crane corresponding to the counterweight boom, there is a lifting boom with a luffing mechanism and a luffing trolley. The luffing mechanism is used to control the movement of the luffing trolley, which is equipped with a pulley block and a hook at the bottom of the pulley block. The lifting ratio of the tower crane is controlled by controlling the number of pulley blocks used.

[0003] Tower cranes primarily use two lifting speeds: 2x and 4x. Currently, the speed selection is done manually by staff through a safety monitoring system, which lacks an internal mechanism to verify the correctness of the selected speed. However, during lifting operations, due to factors such as staff's lack of understanding of tower crane operating procedures and operator errors, there are instances where, even with a 2x speed setting, a staff member mistakenly selects a 4x speed. This causes the monitoring system to trigger alarms, significantly increasing the operational risks of the tower crane and jeopardizing safety during the lifting process.

[0004] To address the above situation, Chinese invention patent CN112173972B discloses a method and system for detecting abnormal lifting ratio settings in a tower crane monitoring system. The method includes: acquiring a first lifting torque on the tower crane and a second lifting torque on the tower crane monitoring system; comparing the first lifting torque with the second lifting torque to determine the difference between the two torques, and determining the lifting ratio setting status of the tower crane monitoring system based on the difference. This technical solution eliminates the problem of abnormal lifting ratio settings caused by operators' lack of understanding of tower crane operating procedures and misoperation by hoisting personnel, greatly reducing the difficulty of personnel training, and enabling real-time acquisition of the current lifting torque, thus improving the safety and reliability of tower crane operation.

[0005] However, this invention determines the tower crane monitoring system's set ratio by the difference between the first and second lifting torques on the counterweight boom and jib on both sides of the tower crane when the tower crane is lifting heavy objects. When calculating the second lifting torque on the jib, it is necessary to measure the mass of the corresponding load and then calculate the second lifting arm. The load G is obtained from the value F of the weight sensor. That is, the calculation of the second lifting arm is carried out when the tower crane is in operation. If the ratio deviation is too large at this time, there will be potential safety hazards. The tower crane monitoring system's abnormal ratio setting detection method and system have a certain lag in use. Summary of the Invention

[0006] Therefore, the purpose of this invention is to provide a detection system and method for abnormal tower crane monitoring system ratio setting, so as to solve the technical problem that the determination of the actual tower crane ratio in the prior art has a lag, which leads to safety hazards during use.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A detection system for abnormal tower crane monitoring system multiplier settings includes:

[0009] The first measuring component, set between the winch and the luffing trolley, is used to perform real-time statistics on the length of the wire rope released or retracted by the winch.

[0010] The second measuring component, installed on the luffing trolley, is used to perform real-time statistics on the distance the hook moves upward or downward.

[0011] The controller is electrically connected to the first measurement component and the second measurement component respectively, and is used to collect, process and analyze the statistical information of the first measurement component and the second measurement component;

[0012] The length of the wire rope released or retracted by the winch is equal to the product of the distance the corresponding hook moves upward or downward and the actual multiplier. If, within the same time period, the absolute value of the difference between the ratio of the length of the wire rope released by the winch to the distance the corresponding hook moves downward or the ratio of the length of the wire rope retracted by the winch to the distance the corresponding hook moves upward and the set multiplier is less than 1, then the multiplier setting is normal. If the absolute value of the difference between the ratio of the length of the wire rope released by the winch to the distance the corresponding hook moves downward or the ratio of the length of the wire rope retracted by the winch to the distance the corresponding hook moves upward and the set multiplier is not less than 1, then the multiplier setting is abnormal.

[0013] The beneficial effects of the above technical solution are as follows: The tower crane monitoring system's abnormal multiplier setting detection system of the present invention obtains the length of the wire rope released or retracted by the winch and the corresponding upward or downward movement distance of the hook within the same time period through the first and second measuring components. The absolute value of the difference between the ratio of the length of the wire rope released by the winch to the downward movement distance of the corresponding hook, or the ratio of the length of the wire rope retracted by the winch to the upward movement distance of the corresponding hook, and the set multiplier is compared with 1. Based on the comparison result, the multiplier setting status of the tower crane detection system is determined. The tower crane monitoring system's abnormal multiplier setting detection system of the present invention calculates the actual multiplier by measuring changes in wire rope length and hook position. It can detect the multiplier setting when the tower crane is unloaded, eliminating measurement lag and ensuring construction safety.

[0014] Furthermore, the first measuring component includes a rotating shaft, a guide disk, and an encoder. The rotating shaft is horizontally mounted on the lifting arm in a direction perpendicular to the extension of the lifting arm, and both ends of the lifting arm are rotatably connected to the lifting arm. The guide disk is coaxially mounted on the rotating shaft for winding the wire rope once. The encoder is fixedly mounted on the lifting arm corresponding to the rotating shaft. The encoder's rotating shaft is fixedly connected to the rotating shaft and coaxially mounted for counting the number of rotations of the guide disk. The product of the circumference of the guide disk and the number of rotations is the length of the wire rope that is released or wound up. The encoder is electrically connected to the controller.

[0015] Beneficial effects: When the wire rope is released or wound up, it drives the guide plate to rotate. The encoder records the number of rotations of the guide wheel in real time. The total length of the wire rope that is released or wound up can be calculated from the radius of the guide wheel and the number of rotations of the guide wheel. The structure is simple, easy to process and install, and the measurement method is safe and efficient.

[0016] Furthermore, the second measuring component includes a photoelectric rangefinder and a diffuse reflector. The photoelectric rangefinder is mounted on the luffing trolley and electrically connected to the controller. It is used to measure the distance between the hook and the luffing trolley in real time. The difference between the distances between the hook and the luffing trolley measured twice by the photoelectric rangefinder is the distance the hook has moved. The diffuse reflector is mounted on the hook corresponding to the photoelectric rangefinder and is used to provide a reflection point for the photoelectric rangefinder.

[0017] Beneficial effects: The structure is simple and the measurement is convenient. By setting up a diffuse reflector, the accuracy of the photoelectric rangefinder in measuring the position of the hook is enhanced, ensuring the measurement results.

[0018] Furthermore, it also includes an alarm component, which includes an alarm indicator light and a voice prompter electrically connected to the controller. The alarm indicator light is used to illuminate when the magnification setting is abnormal, and the voice prompter is used to play a warning voice when the magnification setting is abnormal.

[0019] Beneficial effects: By setting up alarm indicator lights and voice prompts, operators can be easily reminded to adjust the magnification in a timely manner, ensuring construction safety.

[0020] A method for detecting abnormal multiplier settings in a tower crane monitoring system includes the following steps:

[0021] S1. Obtain the length of the wire rope released or retracted by the winch within the same time period, as well as the corresponding distance the hook moves upward or downward.

[0022] S2. Compare the absolute value of the difference between the ratio of the length of the wire rope released by the winch to the distance the corresponding hook moves downward or the ratio of the length of the wire rope wound by the winch to the distance the corresponding hook moves upward and the set ratio, and 1. Based on the comparison result, determine the ratio setting status of the tower crane detection system.

[0023] The beneficial effects of the above technical solution are: the detection method for abnormal tower crane monitoring system ratio setting of the present invention calculates the actual ratio by measuring the changes in wire rope length and hook position, which can detect the ratio setting when the tower crane is unloaded, eliminates the lag in measurement, and ensures construction safety.

[0024] Furthermore, in S1, the length of the wire rope released or retracted by the winch is measured by a first measuring component. The first measuring component includes a rotating shaft, a guide disk, and an encoder. The rotating shaft is horizontally mounted on the lifting arm in a direction perpendicular to the extension of the lifting arm, and both ends of the lifting arm are rotatably connected to the lifting arm. The guide disk is coaxially mounted on the rotating shaft for winding the wire rope one turn. The encoder is fixedly mounted on the lifting arm corresponding to the rotating shaft. The encoder's rotating shaft is fixedly connected to the rotating shaft and coaxially mounted for counting the number of rotations of the guide disk. The length of the wire rope released or retracted is obtained by calculating the product of the circumference of the guide disk and the number of rotations of the guide disk counted by the encoder.

[0025] Beneficial effects: Easy to install; converts linear displacement into angular displacement through guide plate and encoder; quickly calculates the length of wire rope released or bundled based on the number of rotations of guide plate; the measurement method is safe and efficient.

[0026] Furthermore, in S1, the distance the hook moves upward or downward is measured by a second measuring component, which includes a photoelectric rangefinder and a diffuse reflector. The photoelectric rangefinder is mounted on the luffing trolley and is used to measure the distance between the hook and the luffing trolley in real time. The distance the hook moves is calculated by the difference between the distances measured by the photoelectric rangefinder and the luffing trolley twice. The diffuse reflector is mounted on the hook corresponding to the photoelectric rangefinder and is used to provide a reflection point for the photoelectric rangefinder.

[0027] Beneficial effects: By setting up an optical distance meter and a diffuse reflector, it is easy to measure the distance between the hook and the luffing trolley, and the moving distance of the hook can be quickly calculated, which is convenient and fast.

[0028] Furthermore, in S2, the tower crane detection system's magnification setting status is detected by a controller. The controller is electrically connected to both the encoder and the photoelectric distance meter, and is used to collect, process, and analyze the information collected by the encoder and the photoelectric distance meter.

[0029] Beneficial effects: By setting up a controller, the data recorded by each component can be received and analyzed synchronously, which facilitates the detection of the magnification setting.

[0030] Furthermore, in S2, the length of the wire rope released or retracted by the winch is equal to the product of the distance the corresponding hook moves upward or downward and the actual multiplier. Within the same time period, if the absolute value of the difference between the ratio of the length of the wire rope released by the winch to the distance the corresponding hook moves downward or the ratio of the length of the wire rope retracted by the winch to the distance the corresponding hook moves upward and the set multiplier is less than 1, then the multiplier setting is normal. If the absolute value of the difference between the ratio of the length of the wire rope released by the winch to the distance the corresponding hook moves downward or the ratio of the length of the wire rope retracted by the winch to the distance the corresponding hook moves upward and the set multiplier is not less than 1, then the multiplier setting is abnormal.

[0031] Beneficial effect: The actual multiplier adjustment of the tower crane is always an integer multiple of 2. By selecting 1 as a reference value, the actual multiplier caused by friction transmission and other factors can be included in the case where the actual multiplier is fixed to the set multiplier.

[0032] Furthermore, S2 also includes an alarm component, which includes an alarm indicator light and a voice prompter electrically connected to the controller. The alarm indicator light is used to illuminate when the magnification setting is abnormal, and the voice prompter is used to play a warning voice when the magnification setting is abnormal.

[0033] Beneficial effects: By setting up alarm indicator lights and voice prompts, operators can be easily reminded to adjust the magnification in a timely manner, ensuring construction safety. Attached Figure Description

[0034] Figure 1 This is a structural block diagram of the tower crane monitoring system's abnormal multiplier setting detection system according to the present invention;

[0035] Figure 2 This is a schematic diagram of the structure of the first measuring component in the tower crane monitoring system's abnormal rate setting detection system of the present invention;

[0036] Figure 3 This is a flowchart illustrating the detection method for abnormal multiplier settings in the tower crane monitoring system of the present invention.

[0037] Explanation of reference numerals in the attached drawings: 1-First measuring component, 2-Second measuring component, 3-Controller, 4-Alarm component, 201-Lifting boom, 202-Rotating shaft, 203-Guide plate, 204-Encoder, 205-Coupling, 206-Wire rope. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0039] A specific embodiment of the tower crane monitoring system's abnormal multiplier setting detection system of the present invention is as follows:

[0040] like Figure 1 and Figure 2 As shown, the tower crane monitoring system of the present invention includes a detection system for abnormal multiplier settings, comprising a first measuring component 1, a second measuring component 2, a controller 3, and an alarm component 4.

[0041] like Figure 1 and Figure 2 As shown, the first measuring component 1 is disposed between the winch and the luffing trolley, and includes a rotating shaft 202, a guide plate 203, and an encoder 204. The rotating shaft 202 is horizontally disposed on the lifting arm 201 in a direction perpendicular to the extension of the lifting arm 201, and both ends of the lifting arm 201 are rotatably connected to the lifting arm 201. The guide plate 203 is coaxially disposed on the rotating shaft 202, and the rotating shaft 202 is provided with a rotating groove for winding the wire rope 206 one turn. The product of the circumference of the guide plate 203 and the number of turns is the length of the wire rope 206 that is released or wound. The encoder 204 is fixedly disposed on the lifting arm 201 corresponding to the rotating shaft 202. The rotating shaft of the encoder 204 is fixedly connected to the rotating shaft 202 and is coaxially disposed. A coupling 205 is provided between the rotating shaft of the encoder 204 and the rotating shaft. The encoder 204 is electrically connected to the controller 3 to transmit data to the controller 3 for real-time statistics of the length of the wire rope 206 released or retracted by the winch. It should be noted that the encoder 204 is existing technology, and its specific structure and working principle will not be described in detail here.

[0042] like Figure 1 As shown, the second measuring component 2 is mounted on the luffing trolley and includes an electro-optical distance meter and a diffuse reflector plate. It is used to perform real-time statistics on the distance the hook moves upward or downward. The electro-optical distance meter is mounted on the luffing trolley and electrically connected to the controller 3. It is used to measure the distance between the hook and the luffing trolley in real time and transmit the data to the controller 3. The difference between two distance measurements taken by the electro-optical distance meter between the hook and the luffing trolley is the distance the hook has moved. The diffuse reflector plate is mounted on the hook corresponding to the electro-optical distance meter and provides a reflection point for the electro-optical distance meter. It should be noted that the electro-optical distance meter is existing technology, and its specific structure and working principle will not be described in detail here.

[0043] like Figure 1 As shown, controller 3 is used to collect, process, and analyze the information collected by encoder 204 and photoelectric distance meter. The circumference of the guide wheel, i.e., the length of one turn of the wire rope 206, can be calculated from the diameter of the guide wheel. When the wire rope 206 is released or wound, it drives the guide wheel to rotate the corresponding number of turns. The product of the circumferences of the guide wheel and the guide wheel is equal to the length of the wire rope 206 released or wound.

[0044] like Figure 1 As shown, the length of the wire rope 206 released or retracted by the winch is equal to the product of the distance the corresponding hook moves upward or downward and the actual multiplier. If, within the same time period, the absolute value of the difference between the ratio of the length of the wire rope 206 released by the winch to the distance the corresponding hook moves downward or the ratio of the length of the wire rope 206 retracted by the winch to the distance the corresponding hook moves upward and the set multiplier is less than 1, then the multiplier setting is normal. If the absolute value of the difference between the ratio of the length of the wire rope 206 released by the winch to the distance the corresponding hook moves downward or the ratio of the length of the wire rope 206 retracted by the winch to the distance the corresponding hook moves upward and the set multiplier is not less than 1, then the multiplier setting is abnormal.

[0045] like Figure 1 As shown, the alarm component 4 includes an alarm indicator light and a voice prompt. Both the alarm indicator light and the voice prompt are electrically connected to the controller 3. The alarm indicator light is used to illuminate when the magnification setting is abnormal, and the voice prompt is used to play a warning voice when the magnification setting is abnormal.

[0046] The specific working principle of the tower crane monitoring system's abnormal magnification setting detection system of the present invention is as follows: The encoder 204 counts the number of rotations of the guide disc 203. The controller calculates the length of the wire rope 206 that is released or wound up based on the radius of the guide disc 203 and the number of rotations. The distance between the luffing trolley and the hook is measured by the photoelectric distance meter. The controller 3 calculates the distance the hook moves in the vertical direction by subtracting the distances at different positions of the hook. The absolute value of the difference between the length of the wire rope 206 released by the winch and the corresponding hook's downward movement distance or the length of the wire rope 206 wound up by the winch and the corresponding hook's upward movement distance and the set magnification is compared with 1. Based on the comparison result, the tower crane detection system's magnification setting status is determined. If the magnification setting is abnormal, the controller 3 controls the alarm indicator light and voice prompt to issue an alarm.

[0047] The tower crane monitoring system of the present invention has a detection system for abnormal multiplier settings. By measuring changes in the length of the wire rope and the position of the hook, the actual multiplier is calculated. The system can detect the multiplier setting when the tower crane is unloaded, eliminating the lag in measurement and ensuring construction safety.

[0048] A specific embodiment of the detection method for abnormal tower crane monitoring system multiplier setting of the present invention is as follows:

[0049] like Figure 3 As shown, the tower crane monitoring system multiplier setting abnormality detection method of the present invention adopts the tower crane monitoring system multiplier setting abnormality detection system in the above embodiment. Therefore, in the following description, the corresponding component names are directly used for description, and the structure of the corresponding components will not be described in detail.

[0050] The detection method for abnormal tower crane monitoring system scaling settings includes the following steps:

[0051] S1. Obtain the length of the wire rope released or retracted by the winch within the same time period, as well as the corresponding distance the hook moves upward or downward.

[0052] S2. Compare the absolute value of the difference between the ratio of the length of the wire rope released by the winch to the distance the corresponding hook moves downward or the ratio of the length of the wire rope wound by the winch to the distance the corresponding hook moves upward and the set ratio, and 1. Based on the comparison result, determine the ratio setting status of the tower crane detection system.

[0053] The tower crane monitoring system of the present invention provides a method for detecting abnormal multiplier settings. By measuring changes in the length of the wire rope and the position of the hook, the actual multiplier is calculated. This method can detect the multiplier setting when the tower crane is unloaded, eliminating the lag in measurement and ensuring construction safety.

[0054] The embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A detection system for abnormal multiplier settings in a tower crane monitoring system, characterized in that, The utility model relates to a tower crane detection system, including: A first measuring component is arranged between the winch and the luffing trolley to count the length of the steel wire rope released or retracted by the winch in real time; A second measuring component is arranged on the luffing trolley to count the distance of the hook moving upward or downward in real time; A controller is electrically connected to the first and second measuring components to collect and analyze the information counted by the first and second measuring components; The length of the steel wire rope released or retracted by the winch is equal to the product of the corresponding distance of the hook moving upward or downward and the actual multiplying factor, and the absolute value of the difference between the ratio of the length of the steel wire rope released by the winch to the corresponding distance of the hook moving downward or the ratio of the length of the steel wire rope retracted by the winch to the corresponding distance of the hook moving upward to the set multiplying factor is less than 1, indicating that the multiplying factor is set normally, and the absolute value of the difference between the ratio of the length of the steel wire rope released by the winch to the corresponding distance of the hook moving downward or the ratio of the length of the steel wire rope retracted by the winch to the corresponding distance of the hook moving upward to the set multiplying factor is not less than 1, indicating that the multiplying factor is set abnormally.

2. The tower crane monitoring system of claim 1, wherein: The first measuring component includes a rotating shaft, a guide disc and an encoder, the rotating shaft is horizontally arranged on the jib along a direction perpendicular to the extension of the jib, and the two ends of the jib are rotatably connected to the jib, the guide disc is coaxially arranged on the rotating shaft to wind the steel wire rope for one turn, and the encoder is fixedly arranged on the jib corresponding to the rotating shaft, the rotating shaft of the encoder is fixedly connected to the rotating shaft and coaxially arranged, to count the number of turns of the guide disc, the product of the circumference of the guide disc and the number of turns is the length of the steel wire rope released or retracted, and the encoder is electrically connected to the controller.

3. The tower crane monitoring system of claim 1, wherein: The second measuring component includes a photoelectric range finder and a diffuse reflection plate, the photoelectric range finder is arranged on the luffing trolley and electrically connected to the controller to measure the distance between the hook and the luffing trolley in real time, the difference between the distances between the hook and the luffing trolley measured by the photoelectric range finder twice is the distance of the hook moving, and the diffuse reflection plate is arranged on the hook corresponding to the photoelectric range finder to provide a reflection point for the photoelectric range finder.

4. The tower crane monitoring system of any one of claims 1-3, wherein the system is configured to detect a ratio setting abnormality when the ratio of the first and second distances is not within a predetermined range. The utility model also includes an alarm component, which includes an alarm prompt light and a voice prompter electrically connected to the controller, the alarm prompt light is used to light up when the multiplying factor is set abnormally, and the voice prompter is used to play a warning voice when the multiplying factor is set abnormally.

5. The detection method of the detection system of the tower crane monitoring system magnification setting abnormality according to claim 1, characterized in that, The utility model also includes the following steps: S1, obtaining the length of the steel wire rope released or retracted by the winch and the corresponding distance of the hook moving upward or downward in the same period of time; S2, comparing the absolute value of the difference between the ratio of the length of the steel wire rope released by the winch to the corresponding distance of the hook moving downward or the ratio of the length of the steel wire rope retracted by the winch to the corresponding distance of the hook moving upward to the set multiplying factor with 1 in the same period of time, and determining the multiplying factor setting state of the tower crane detection system based on the comparison result.

6. The tower crane monitoring system abnormality detection method of claim 5, wherein: In S1, the length of the wire rope released or retracted by the winch is measured by a first measuring assembly, which comprises a rotating shaft, a guide disc and an encoder. The rotating shaft is horizontally arranged on the jib in a direction perpendicular to the extension of the jib, and the two ends of the jib are rotationally connected to the jib. The guide disc is coaxially arranged on the rotating shaft and used for winding the wire rope. The encoder is fixedly arranged on the jib corresponding to the rotating shaft, and the rotating shaft of the encoder is fixedly and coaxially connected to the rotating shaft. The encoder is used for counting the number of turns of the guide disc. The length of the wire rope released or retracted is obtained by calculating the product of the circumference of the guide disc and the number of turns of the guide disc counted by the encoder.

7. The tower crane monitoring system abnormality detection method of claim 6, wherein: In S1, the distance of the upward movement or downward movement of the hook is measured by a second measuring assembly, which comprises an optical distance measuring instrument and a diffuse reflection plate. The optical distance measuring instrument is arranged on the luffing trolley and used for measuring the distance between the hook and the luffing trolley in real time. The distance of the movement of the hook is obtained by calculating the difference between the distances between the hook and the luffing trolley measured by the optical distance measuring instrument twice. The diffuse reflection plate is arranged on the hook corresponding to the optical distance measuring instrument and used for providing a reflection point for the optical distance measuring instrument.

8. The tower crane monitoring system abnormality detection method of claim 7, wherein: In S2, the magnification setting state of the tower crane detection system is detected by a controller. The controller is electrically connected to the encoder and the optical distance measuring instrument, and used for collecting and processing the information counted by the encoder and the optical distance measuring instrument. The length of the wire rope released or retracted by the winch is equal to the product of the distance of the upward movement or downward movement of the corresponding hook and the actual magnification. In the same period of time, if the absolute value of the difference between the ratio of the length of the wire rope released by the winch to the distance of the downward movement of the corresponding hook or the ratio of the length of the wire rope retracted by the winch to the distance of the upward movement of the corresponding hook and the set magnification is less than 1, the magnification setting is normal. If the absolute value of the difference between the ratio of the length of the wire rope released by the winch to the distance of the downward movement of the corresponding hook or the ratio of the length of the wire rope retracted by the winch to the distance of the upward movement of the corresponding hook and the set magnification is not less than 1, the magnification setting is abnormal.

9. The tower crane monitoring system abnormality detection method of claim 7, wherein: In S2, an alarm assembly is further included, which comprises an alarm prompt lamp and a voice prompter electrically connected to the controller. The alarm prompt lamp is used for lighting when the magnification setting is abnormal, and the voice prompter is used for playing an alarm voice when the magnification setting is abnormal.

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