KR20220030605A - Safety Management System for Tower Crane - Google Patents

Abstract

Disclosed is a tower crane safety control system. The system of the present invention comprises: a rotation driving unit provided at an upper part of a mast so that a jib of a tower crane can rotate in the horizontal direction; a trolley position sensor unit for detecting a position of a trolley moving forward and backward on the jib and a position of a hoisting block connected to the trolley to move a material vertically and downward; a control unit for predicting and controlling a collision risk through information transmitted from the rotation driving unit and the trolley position sensor unit; and a notification unit transmitting the collision risk received from the control unit to a driver. An objective of the present invention is to provide the tower crane safety control system which can immediately check a position of the tower crane without zero point correction.

Description

Tower Crane Safety Control System {Safety Management System for Tower Crane}

The present invention relates to a safety control system, and more particularly, to a safety control system that can be used in a tower crane.

The content described in this section merely provides background information for the present embodiment and does not constitute the prior art.

A T-type tower crane (hereinafter referred to as a tower crane) that lifts materials at a construction site can be largely composed of a jib that turns, moves forward and backward of the trolley, and raises and lowers the hoisting block, and a tower mast that supports the jib. there is.

After completing the work, the tower crane releases the rotation brake at the same time as the power is turned off to prevent a rollover accident due to strong wind. If the tower crane rotates after power is cut off, the tower crane must be rotated until it passes the zero point sensor after power is applied to detect the correct rotation angle and then determine the position of the tower crane.

In addition, since a plurality of tower cranes are operated at a construction site, there is a risk of mutual collision when the working radius overlaps.

In order to solve this problem, Patent Registration No. 10-1830519 (registered on February 12, 2018, a highly reliable tower crane collision prevention system) uses a turning sensor to determine the position of the tower crane in real time to collide between tower cranes. A system for preventing

However, the zero point correction of the conventional tower crane was performed during 360 degree rotation, and if the tower crane rotated after the power was cut off, there was a problem that the tower crane had to rotate a lot until the zero point was corrected in order to start work.

Therefore, in order to solve the problems of the prior art, an object of the present invention is to provide a tower crane safety control system that can immediately check the position of the tower crane without zero point correction when power is turned off and then applied again after work. there is.

In addition, it is to provide a tower crane safety control system that can calculate the rotation angle in a state in which power is not supplied.

However, the object of the present invention is not limited to the above, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above objects, the tower crane safety control system of the present invention is a rotary driving part provided on the mast upper so that the jib of the tower crane is rotatable in the horizontal direction, the position of the trolley moving forward and backward on the jib and the trolley A trolley position sensor unit that detects the position of a connected hoisting block that moves materials vertically and downwardly, a control unit that predicts and controls the risk of collision through information received from the rotation driving unit and the trolley position sensor unit, and the control unit and a notification unit for transmitting the received collision risk to the driver, wherein the rotation driving unit includes a fixed unit mounted and fixed on the mast, a rotating unit positioned rotatably on the upper portion of the fixed unit, and a rotating unit mounted on the rotating unit to provide the fixed unit A rotation sensor rotating along the inner surface and outputting first and second rotation angle signals, a plurality of zero points installed at a predetermined interval in the fixing unit, and a plurality of zero points located above the rotation sensor and detecting one of the plurality of zero points It may include a zero-point sensor for outputting first and second zero-point correction signals and a position detection unit for detecting the position of the tower crane based on the rotation angle signal and the zero-point correction signal.

In an embodiment of the present invention, the position detection unit, a sensor detection unit that detects the rotation angle of the tower crane based on the first and second rotation angle signals and receives the first and second zero point correction signals, the zero point A rotation angle correction unit for detecting an actual rotation angle based on a correction signal and correcting the rotation angle of the tower crane detected by the sensor detection unit, a storage unit for storing the rotation angle of the tower crane and the corrected rotation angle of the tower crane; and an internal power supply for supplying power to the sensor detection unit, the rotation angle correcting unit and the storage unit when the power of the tower crane is cut off, wherein the control unit includes a rotation angle detected by the sensor detection unit or the rotation angle correction unit The orientation of the tower crane may be confirmed based on the detected actual rotation angle.

In an embodiment of the present invention, the internal power supply unit may supply power when the zero point sensor detects a preset point in the fixing unit.

In an embodiment of the present invention, the trolley position sensor unit may include a distance sensor unit for measuring the distance to the hoisting block and a driving unit for driving the distance sensor unit according to a control signal of the control unit.

In an embodiment of the present invention, the notification unit, the display unit for displaying the azimuth information and the working radius of the tower crane on the construction site map, an alarm unit that transmits the collision risk to the driver with lights and sound, and azimuth information and trolley between the tower crane It may include a communication unit for exchanging the location information and the location information of the hoisting block.

By providing the tower crane safety control system of the present invention, it is possible to detect the exact tower crane rotation angle even when the power of the tower crane is cut off, so that the operation can be started after immediately checking the position of the tower crane after power is applied.

In addition, since the zero point correction is performed at various positions, it is possible to reduce the rotation angle error.

In addition, since the rotation angle can be calculated using a small battery after the tower crane is powered off, the operating cost can be greatly reduced.

Even if it is an effect not explicitly mentioned herein, the effects described in the following specification expected by the technical features of the present invention and their potential effects are treated as if they were described in the specification of the present invention.

1 is a view schematically showing a tower crane safety control system according to an embodiment of the present invention.
2 is a block diagram showing the main configuration of a tower crane safety control system according to an embodiment of the present invention.
3 is a view showing a rotation driving unit according to an embodiment of the present invention.
4 is a block diagram showing the configuration of a position detection unit according to an embodiment of the present invention.
5 is a block diagram illustrating the configuration of a trolley position sensor unit according to an embodiment of the present invention.
6 is a view for explaining a method of calculating the trolley distance and the height of the hoisting block in the control unit according to an embodiment of the present invention.
7 is a block diagram illustrating the configuration of a notification unit according to an embodiment of the present invention.
8 is a flowchart for explaining a method of driving a tower crane safety control system when the main power is ON according to an embodiment of the present invention.
9 is a flowchart for explaining a method of driving a tower crane safety control system when the main power is OFF according to an embodiment of the present invention.

The above object and means of the present invention and its effects will become more apparent through the following detailed description in relation to the accompanying drawings, and accordingly, those of ordinary skill in the art to which the present invention pertains can easily understand the technical idea of the present invention. will be able to carry out In addition, in describing the present invention, if it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

The terminology used herein is for the purpose of describing the embodiments, and is not intended to limit the present invention. In the present specification, the singular form also includes the plural form as the case may be, unless otherwise specified in the phrase. In this specification, terms such as "include", "include", "provide" or "have" do not exclude the presence or addition of one or more other elements other than the mentioned elements.

In this specification, terms such as “or”, “at least one” and the like may indicate one of the words listed together, or a combination of two or more. For example, "A or B" or "at least one of A and B" may include only one of A or B, or both A and B.

In this specification, descriptions according to “for example” and the like may not exactly match the presented information, such as recited properties, variables, or values, tolerances, measurement errors, limits of measurement accuracy, and other commonly known factors. The embodiments of the present invention according to various embodiments of the present invention should not be limited by effects such as modifications including .

In this specification, when it is described that a certain element is 'connected' or 'connected' to another element, it may be directly connected or connected to the other element, but other elements may exist in between. It should be understood that there may be On the other hand, when it is mentioned that a certain element is 'directly connected' or 'directly connected' to another element, it should be understood that the other element does not exist in the middle.

In this specification, when it is described that a certain element is 'on' or 'in contact with' another element, it may be directly in contact with or connected to the other element, but another element may exist in the middle. It should be understood that On the other hand, when it is described that a certain element is 'directly on' or 'directly' of another element, it may be understood that another element does not exist in the middle. Other expressions describing the relationship between elements, for example, 'between' and 'directly between', can also be interpreted similarly.

In this specification, terms such as 'first' and 'second' may be used to describe various components, but the components should not be limited by the above terms. In addition, the above terms should not be construed as limiting the order of each component, and may be used for the purpose of distinguishing one component from another. For example, a 'first component' may be referred to as a 'second component', and similarly, a 'second component' may also be referred to as a 'first component'.

Unless otherwise defined, all terms used herein may be used with meanings commonly understood by those of ordinary skill in the art to which the present invention pertains. In addition, terms defined in a commonly used dictionary are not to be interpreted ideally or excessively unless specifically defined explicitly. Hereinafter, the configuration of the tower crane safety control system according to an embodiment of the present invention will be described in detail with reference to the related drawings.

Figure 1 is a view schematically showing a tower crane safety control system according to an embodiment of the present invention, Figure 2 is a block diagram showing the main configuration of the tower crane safety control system according to an embodiment of the present invention, Figure 3 is this It is a view showing a rotation driving unit according to an embodiment of the present invention, FIG. 4 is a block diagram showing the configuration of a position detection unit according to an embodiment of the present invention, and FIG. 5 is a diagram showing the configuration of a trolley position sensor unit according to an embodiment of the present invention 6 is a block diagram illustrating a method for calculating a trolley distance and a height of a hoisting block in a control unit according to an embodiment of the present invention, and FIG. 7 is a configuration of a notification unit according to an embodiment of the present invention It is a block diagram.

1 to 7, the tower crane safety control system 10 of the embodiment of the present invention can detect the position of the tower crane to prevent collision with other cranes.

Specifically, it is possible to prevent a collision with other cranes by detecting the orientation of the tower crane, the position of the trolley 26 and the height of the hoisting block 28 .

In addition, it is possible to detect the orientation of the tower crane even when the power is cut off after work, so that when power is applied to perform the work, the tower crane can be used immediately without zero point correction.

Here, the orientation of the tower crane refers to the horizontal position of the tower crane jib 24 .

The tower crane safety control system 10 may include a rotation driving unit 100 , a trolley position sensor unit 200 , a control unit 300 , and a notification unit 400 .

The rotation driving unit 100 of the embodiment of the present invention is provided on the mast 20 and can detect the rotation angle of the jib 24 rotating in the horizontal direction.

The rotary driving unit 100 includes a fixed unit 110 fixed to the tower mast 20, and a rotating unit 120 positioned between the fixed unit 110 and the cab 22 to rotate together with the cab 22, and a high A rotation sensor 130 that rotates along the inner surface of the government 110 and outputs a rotation angle signal, a zero point sensor 140 positioned above the rotation sensor 130 and outputting a zero correction signal, and a fixed part ( A plurality of zero points 150 installed at a predetermined distance apart from 110) and a position detection unit 160 installed on the rotating unit 120 to receive a rotation angle signal and a zero point correction signal to detect the position of the jib 24 can do.

The rotation sensor 130 of the embodiment of the present invention is installed to be rotatable along the inner surface of the fixing unit 110 , and may output the degree of rotation of the rotation unit 120 as a rotation angle signal.

The rotation sensor 130 may output a first rotation angle signal when the main power of the tower crane is ON, and a second rotation angle signal when the main power of the tower crane is OFF.

Here, the rotation sensor 130 is a sensor with wheels attached to the motor, outputs a voltage proportional to the number of rotations, and sends it to the circuit to measure the speed of the motor to detect the rotation angle. Rotary Encoder It may be a sensor.

The rotation sensor 130 can detect at least 100 rotations without driving power even when the main power of the tower crane is OFF, and this is if the rotation ratio of the rotation sensor 130 and the jib 24 is 20:1, the jib ( It means that the horizontal rotation of 24) can be detected up to at least 5 rotations.

Therefore, when the main power of the tower crane is OFF, the tower crane can be used immediately without zero point correction after the power of the tower crane is applied by the rotation angle signal output from the rotation sensor 130 .

When the zero point sensor 140 of the embodiment of the present invention passes the zero point 150, it may output a zero point correction signal. Here, the zero point correction signal refers to a signal for correcting the rotation angle signal detected from the rotation sensor 130 . When the fixing part 110 is not a perfect circle, for example, foreign substances are attached to the inner surface of the fixing part 110 , and an error may occur in the rotation angle of the rotation sensor 130 . At this time, the error may be corrected by the output zero point correction signal. A detailed method for correcting the error will be described later.

Since the zero point sensor 140 outputs a zero point correction signal every time it detects the zero point 150 , it is possible to reduce error occurrence and detect an accurate rotation angle.

In addition, when the zero point sensor 140 passes a preset point, the internal power supply unit 164 may be turned on.

Here, the preset point may be not one but a plurality of zero points 150 , and when the main power for driving the tower crane is OFF, the zero point sensor 140 passes one of the plurality of zero points 150 inside The power supply unit 164 may be turned on.

The zero points 150 of the embodiment of the present invention may be installed on the inner surface of the fixing unit 110 spaced apart from each other by a predetermined interval.

Specifically, six zero points 150 as permanent magnets may be installed at intervals of 60°, but the present invention is not limited thereto, and 12 units may be installed at intervals of 30°.

The position detecting unit 160 of the embodiment of the present invention may detect the orientation of the tower crane based on the rotation angle signal and the zero point correction signal output from the rotation sensor 130 and the zero point sensor 140, and the sensor detecting unit 161 , a rotation angle correction unit 162 , a storage unit 163 and an internal power supply unit 164 may be included.

The sensor detection unit 161 of the embodiment of the present invention may receive the first and second rotation angle signals output from the rotation sensor 130 to detect the first and second rotation angles, and output from the zero point sensor 140 . The first and second zero-point correction signals to be transmitted can be received.

Here, the first rotation angle signal is a rotation angle signal output from the rotation sensor 130 when power is applied to the tower crane and work is being performed at the construction site, and the second rotation angle signal is the power of the tower crane is cut off to perform work It is a rotation angle signal output from the rotation sensor 130 when not in operation.

In addition, the first zero point correction signal is a signal output when the zero point sensor 140 passes the zero point 150 when power is applied to the tower crane, and the second zero point calibration signal is a zero point sensor when the power of the tower crane is cut off It is a zero point correction signal that is output when 140 passes the zero point 150 and power is applied to the internal power supply unit 164 at the same time.

In addition, the sensor detection unit 161 may detect the rotation direction of the tower crane.

Specifically, the rotation direction of the tower crane can be detected using the equation Dx = Da-Db. Here, Dx is the rotation direction, Da is the current rotation angle, Db is the previous rotation angle, and if Dx > 0, it can be detected that the rotation is in a clockwise direction, and when Dx < 0, it is rotated in a counterclockwise direction.

For example, if the current rotation angle is 60° and the previous rotation angle is 70°, the rotation direction (Dx) of the tower crane is 60 - 70 = -10 < 0, so it can be detected that it is a counterclockwise direction.

The rotation angle correction unit 162 of the embodiment of the present invention may zero-correct the rotation angle detected by the sensor detection unit 161 as an actual rotation angle when the zero point correction signal is received from the sensor detection unit 161 .

Specifically, the actual rotation angle can be detected using the equation Dt = round(D / Dc)*Dc. Here, Dt is the actual rotation angle, D is the rotation angle detected from the rotation sensor 130, Dc is the zero point 150 installation interval, round means rounding or rounding down. If the actual rotation angle and the rotation angle detected by the sensor detection unit 161 are different, the rotation angle detected by the sensor detection unit 161 may be zero-corrected as the actual rotation angle.

1*60 = 60 임을 검출할 수 있다. 여기서, 실제 회전각과 회전센서(130)로부터 검출된 회전각이 다르므로 센서검출부(161)에서 검출된 회전각은 60°로 영점보정 된다. For example, if the rotation angle detected from the rotation sensor 130 is 70° and the zero points 150 are installed at intervals of 60°, the actual rotation angle Dt is round(70/60)*60 = round(1.167). )*60

It can be detected that 1*60 = 60. Here, since the actual rotation angle and the rotation angle detected by the rotation sensor 130 are different, the rotation angle detected by the sensor detection unit 161 is zero-corrected to 60°.

The storage unit 163 of the embodiment of the present invention stores the tower crane orientation information detected by the sensor detection unit (161).

Specifically, the first rotation angle and the corrected first rotation angle detected when the main power of the tower crane is ON are stored, and the second rotation angle and the corrected second rotation angle detected when the main power of the tower crane is OFF Two rotation angles can be stored.

The storage unit 163 may include, for example, a hard disk type, a magnetic media type, a compact disc read only memory (CD-ROM), or an optical media type according to the type. type), Magneto-optical media type, Multimedia card micro type, Flash memory type, ROM type (Read only memory type), RAM type (Random access) memory type) and the like. In addition, the storage unit may be a cache, a buffer, a main memory device, an auxiliary memory device, a separately provided storage system, etc. according to its purpose/location.

The internal power supply unit 164 of the embodiment of the present invention may supply power to the sensor detection unit 161 when the power of the tower crane is cut off, that is, when the main power unit is OFF.

Specifically, when the zero point sensor 140 passes a preset point in the fixing unit 110 , the internal power unit 164 is turned on and power is supplied to the sensor detection unit 161 .

Here, the preset point may be the zero point 150, and the internal power supply unit 164 may be composed of a small battery, dry cell, and the like.

The trolley position sensor unit 200 of the embodiment of the present invention includes a distance sensor unit 210 and a driving unit 220, and a trolley 26 connected to the jib 24 and a trolley 26 by a hoisting rope. It is possible to detect the position of the connected hoisting block 28 .

The distance sensor unit 210 of the embodiment of the present invention can measure the distance from the distance sensor unit 210 to the hoisting block (28).

Specifically, the distance sensor unit 210 measures the distance to the hoisting block 28 by calculating the time until the reflected light is received after irradiating the laser light on the special reflective sticker attached to the hoisting block 28 . It may be a laser distance sensor.

The driving unit 220 of the embodiment of the present invention may control the direction of the laser light irradiated from the distance sensor unit 210 according to a control signal of the control unit 300 .

Specifically, the driving unit 220 is driven in the Y-axis direction to measure the distance between the trolley 26 and the hoisting block 28, and is driven in the Z-axis direction to sense the shaking of the hoisting block 28. It may be a motor in the form of a gimbal that can be

The control unit 300 of the embodiment of the present invention may estimate the risk of collision by receiving the direction confirmation and trolley location information between the tower cranes.

Specifically, referring to FIG. 6 , the control unit 300 controls the distance (dist) from the trolley position sensor unit 200 to the hoisting block 28 detected and the jib 24 and the hoisting block 28 form Based on the angle rad, the position x of the trolley 26 and the height y of the hoisting block 28 may be calculated.

의 식으로 구할 수 있다. 또한, 호이스팅 블록(28)의 높이 y는

의 식을 통해 구할 수 있다.Specifically, if dist and rad are measured through the distance sensor unit 210, the position x of the trolley 26 is

can be obtained in the form of In addition, the height y of the hoisting block 28 is

It can be obtained through the expression of

In addition, when the control unit 300 calculates the possible collision distance between the tower cranes and enters within the set distance, the control unit 300 may transmit collision risk information to the display unit 410 and the alarm unit 420 .

The notification unit 400 of the embodiment of the present invention includes a display unit 410, an alarm unit 420, and a communication unit 430, and the location information and risk information received from the control unit 300 to the tower crane operator and construction site manager can transmit

The display unit 410 of the embodiment of the present invention displays a map of the construction site, location information and work radius of each tower crane, and the tower crane operator can control the tower crane based on the information received through the display unit 410 .

The display unit 410 is, for example, a liquid crystal display (LCD), a light-emitting diode (LED) display, an organic light-emitting diode (OLED) display, or a microelectromechanical system. Devices such as (Microelectromechanical systems, MEMS) displays, electronic paper displays, and the like may be used.

The warning unit 420 according to the embodiment of the present invention may transmit the risk of collision to the driver using light or sound. For example, a device such as a warning light flashing a warning lamp according to a danger level or a buzzer outputting a notification sound according to a danger level may be used.

The communication unit 430 of the embodiment of the present invention may transmit or receive the location information of the tower crane to another tower crane or an external device.

Specifically, the communication unit 430 by sharing the tower crane orientation information and the trolley position information between the tower cranes or the central control unit, tower crane operators or construction site managers can receive the information.

The communication unit 430 is, for example, the communication unit 430 using wired communication such as cable communication, 5th generation communication (5G), long term evolution advanced (LTE-A), long term evolution (LTE), Bluetooth, BLE Durability evaluation data can be transmitted to an external device (computer, tablet PC, smart phone, etc.) using wireless communication such as (bluetooth low energe) and near field communication (NFC).

8 is a flowchart for explaining a method of driving a tower crane safety control system when the main power is ON according to an embodiment of the present invention.

Referring to Figure 8, first, the tower crane safety control system 10 checks whether the main power of the tower crane is on (S801). Thereafter, it is checked whether the second rotation angle or the corrected second rotation angle, which is the orientation of the tower crane when the main power of the tower crane is OFF, is stored in the storage unit 163 (S803). If there is a stored second rotation angle or a corrected second rotation angle, the bearing and trolley position information of another crane are received (S815).

Next, it is determined whether collision with another crane is possible (S817). If the controller 300 determines that a collision is possible, a collision warning notification is turned on on the display unit 410 and the alarm unit 420 (S819). Thereafter, it proceeds to the step of outputting the first rotation angle signal (S805). If it is determined that the control unit 300 is safe, the previous collision warning notification ON is changed to OFF, and the safety of task performance is transmitted to the driver or manager.

Next, it proceeds to the step of determining whether to continue to perform the operation (S823). If it is desired to stop the operation, the main power OFF step is performed (S825) and then the operation is terminated, and if it is desired to continue the operation, the first rotation angle signal output step is performed (S805).

When the main power of the tower crane stored in the storage unit 163 is off (OFF), if there is no bearing information value of the crane, a collision warning notification is transmitted, or if you want to continue to perform the operation, the first rotation from the rotation sensor 130 A step of outputting each signal is performed (S805).

Next, a step of checking whether the first zero point correction signal is output from the zero point sensor 140 is performed (S807). If the first zero point correction signal is output, the actual rotation angle and the rotation angle detected from the rotation sensor 130 are compared, and if the two values are different, a first rotation angle correction step of correcting the actual rotation angle is performed (S809), If the first zero point correction signal is not output, the step of transmitting the crane bearing information to the outside is performed (S811).

Next, a step of transmitting the trolley position information detected by the trolley position sensor unit 200 to the outside is performed (S813).

Next, after performing the step (S815) of receiving the bearing and trolley position information of another crane, the above-described steps are repeatedly performed until the operation is finished.

9 is a flowchart for explaining a method of driving a tower crane safety control system when the main power is OFF according to an embodiment of the present invention.

Referring to FIG. 9 , first, the power of the tower crane is cut off, and if the main power is OFF, it proceeds to the second rotation angle signal output step (S901). Here, the second rotation angle signal may be detected by the rotation sensor 130 .

Next, when the zero point sensor 140 detects the zero point 150, a second zero point correction signal output step is performed (S903), and power is applied to the internal power supply unit 164 (S905).

Since power is applied to the internal power supply unit 164 , the sensor detection unit 161 can calculate the actual rotation angle and compare it with the rotation angle detected from the rotation sensor 130 , and if the two values are detected differently, it is detected from the rotation sensor 130 . A second rotation angle correction step of correcting the obtained rotation angle to the actual rotation angle may be performed (S907).

Next, a crane bearing storage step of storing the corrected second rotation angle in the storage unit 163 is performed (S909).

After storing the crane orientation information in the storage unit 163, the internal power supply unit power off (OFF) step (S911) of cutting off the internal power unit power is performed and then terminated.

In the detailed description of the present invention, although specific embodiments have been described, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention is not limited to the described embodiments, and should be defined by the following claims and their equivalents.

10: tower crane safety control system 20: tower mast
22: cab 24: jib
26: trolley 28: hoisting block
100: rotation driving unit 110: fixed unit
120: rotation unit 130: rotation sensor
140: zero point sensor 150: zero point
160: position detection unit 161: sensor detection unit
162: rotation angle correction unit 163: storage unit
164: internal power supply 200: trolley position sensor unit
210: driving unit 220: distance sensor unit
300: control unit 400: notification unit
410: display unit 420: alarm unit
430: communication unit

Claims (5)

a rotation driving unit provided on the mast so that the jib of the tower crane can rotate in the horizontal direction;
a trolley position sensor unit for determining the position of the trolley moving forward and backward on the jib and the position of the hoisting block connected to the trolley to move the material vertically and downward;
a control unit for predicting and controlling the risk of collision through the information received from the rotation driving unit and the trolley position sensor unit;
and a notification unit for transmitting the collision risk received from the control unit to the driver,
The rotary drive unit,
a fixing part mounted on the mast and fixed;
a rotating part rotatably positioned on the fixing part;
a rotation sensor mounted on the rotating part, rotating along the inner surface of the fixing part, and outputting first and second rotation angle signals;
a plurality of zero points spaced apart from the fixing part by a predetermined interval;
a zero point sensor positioned above the rotation sensor and outputting first and second zero point correction signals when detecting one of the plurality of zero points;
A tower crane safety control system including a position detection unit for detecting the position of the tower crane based on the first and second rotation angle signals and the first and second zero point correction signals. According to claim 1,
The position detection unit,
a sensor detection unit for detecting the rotation angle of the tower crane based on the first and second rotation angle signals and receiving the first and second zero point correction signals;
a rotation angle correction unit for detecting an actual rotation angle based on the zero point correction signal and correcting the rotation angle of the tower crane detected by the sensor detection unit;
A storage unit for storing the rotation angle of the tower crane and the corrected rotation angle of the tower crane;
Comprising an internal power supply for supplying power to the sensor detection unit, the rotation angle correction unit and the storage unit when the power of the tower crane is cut off,
The control unit is
Tower crane safety control system, characterized in that for confirming the orientation of the tower crane based on the rotation angle detected by the sensor detection unit or the actual rotation angle detected by the rotation angle correction unit. 3. The method of claim 2,
The internal power supply unit,
Tower crane safety control system, characterized in that it can supply power when the zero point sensor detects a preset point in the fixing part. According to claim 1,
The trolley position sensor unit,
A distance sensor that measures the distance to the hoisting block and
Tower crane safety control system including a driving unit for driving the distance sensor unit according to the control signal of the control unit. According to claim 1,
The notification unit,
A display unit for displaying the bearing information and the working radius of the tower crane on the construction site map;
an alarm unit that informs the driver of the risk of collision with lights and sounds; and
A tower crane safety control system including a communication unit for exchanging bearing information between tower cranes, trolley position information, and position information of the hoisting block.

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