KR200265002Y1 - A weight detection and alarm system used to a crane of hook - Google Patents

Abstract

Disclosed is a hook hook weight detection alarm system. The crane hook hook weight detection alarm system of the present invention outputs a display signal and an alarm sound signal according to excess weight to the weight data of the material mounted on the hook of the crane and simultaneously displays the weight data and the alarm sound generation data. It consists of a weight sensing terminal for remote transmission, and a remote receiving terminal for receiving and outputting the transmitted weight data and alarm sound generation data, the alarm according to the excess weight is made to both the crane driver and the ground hook worker. According to the present invention, in particular, the ground rope worker who is exposed to danger can easily know the weight and overload of the material, thereby minimizing the risk and sharing the same information with the crane operator, thereby reducing the industrial accident.

Description

A weight detection and alarm system used to a crane of hook}

The present invention relates to a crane hook hanger weight detection alarm system, in particular, crane hook hanger weight sensing consisting of a weight sensing terminal and a remote receiving terminal for displaying and alarming information on the weight of the material to both the crane operator and the ground hook operator It relates to an alarm system.

In cranes that are most used to carry heavy loads in construction and industrial sites, there are many difficulties in measuring the weight of cargo, which can cause industrial accidents during loading or moving of heavy loads. In addition, many products to prevent overload are commercially available. For example, the overload protection device is installed only in the motor part or the cab of the crane body. The worker performing the hook work has a problem that is difficult to respond quickly. To prevent this, a weight sensing unit for detecting the weight using a load cell, a display unit for displaying the detected weight, and an alarm sound when the set weight is exceeded so that an alarm can be issued to the ground hook worker. The display device by weight sensing and the alarm sound generating device having the alarm sound generating unit are attached to the hook of the crane.

The display device and the alarm sound generating device by the above-described weight detection are mainly mounted on the hook to display the wire hanger worker to hang the material or to generate an alarm sound can prevent the worker's disaster. However, in the case of tower cranes used for material transportation in the construction of high-rise buildings, the crane driver and the ground-line worker are too far apart, so it is inconvenient to separately inform the driver of the weight of the material by using separate communication equipment. there was.

Accordingly, an object of the present invention is to detect the weight of the hook, including a detection unit, a weight display unit, a warning sound generating unit using a load cell in order to display and alert information about the weight of the material to both the crane operator and the ground hook operator. The present invention provides a crane hook hanger weight sensing alarm system comprising a terminal and a remote receiving terminal provided at a crane driver remote from the weight sensing terminal.

Crane hook hanger weight detection system for achieving the object of the present invention, the displacement detection unit for being mounted to the hook of the crane to detect the displacement of the hook to output a displacement signal; An amplifier for amplifying the displacement signal; An A / D converter for outputting the amplified signal as binarized weight data in comparison with a signal of a reference voltage; A first microprocessor which receives and processes the weight data to output a weight display signal and an alarm sound generation signal according to the excess weight, and process a key input signal input by a user operation; A display unit which displays the weight by the weight display signal; An alarm sound generating unit for generating an alarm sound by the alarm sound generating signal; And a transmitter for transmitting the weight data and the alarm sound generation data transmitted from the first microprocessor; and a weight sensing terminal comprising: a receiver receiving the weight data and the alarm sound generation data transmitted from the transmitter; A signal amplifier for amplifying the signal transmitted from the receiver; A filter for filtering the amplified signal; A second microprocessor configured to process the filtered data to output a display signal of weight data and to output an alarm sound generation signal of alarm sound generation data; A display unit which displays the weight by the display signal; And a remote alarm terminal configured to generate an alarm sound by the alarm sound generation signal. In this case, the displacement sensing unit uses a strain gauge load cell, and the amplification unit of the weight sensing terminal uses a differential amplifier. Herein, the power supply of the weight sensing terminal is performed by a battery charging circuit which performs charging according to the state of charge of the battery with respect to the power supplied from the outside, and at least one battery connected to the battery charging circuit. desirable.

1 is a control block diagram schematically showing the configuration of a crane hook hanger weight sensing system according to an embodiment of the present invention,

2 is a detailed circuit diagram of a part of the control block of the weight sensing terminal according to an embodiment of the present invention;

3 is a view schematically showing a charging circuit used in the present invention,

4 is a flowchart illustrating a control method of a crane hook hanger weight sensing system according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

1: weight sensing terminal 11: displacement sensing unit

12: amplification unit 13: A / D conversion unit

14: key input unit 15: first microprocessor

16: weight sensing side display unit 17: weight sensing side alarm sound generating unit

18: memory 19: transmitter

2: remote receiving terminal 21: receiving unit

22: signal amplifier 23: filter

24: second microprocessor 25: receiving side display unit

26: receiving side alarm sound generating unit 3: battery charging circuit

4: battery

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

1 is a control block diagram schematically showing the configuration of a crane hook hanger weight detection system according to an embodiment of the present invention. As shown in Figure 1, the crane hook hanger weight detection system of the present invention is largely, a weight sensing terminal (1) to inform the weight of the ground hanger worker, and a remote receiving terminal (10) to inform the crane driver of the weight ( 2) will be made.

The weight sensing terminal 1 is attached to the hook of the crane, the displacement detection unit 11 for detecting the displacement of the hook and outputs a displacement signal, the amplifier 12 for amplifying the displacement signal and the amplified A / D converter 13 for outputting the signal as binarized weight data by comparing the signal with a reference voltage, a key input unit 14 provided to support user operation, and receiving and processing the weight data to display the weight. A first microprocessor 15 which outputs a signal and an alarm sound generation signal according to the excess weight, and processes a key input signal input by a user operation, and a weight sensing side display unit which displays the weight by the weight display signal. 18, a weight sensing side alarm sound generation unit 17 for generating an alarm sound by the alarm sound generation signal, and a memory 18 for storing data and weight processing algorithms input through the key input unit 14; And a transmission unit 19 for transmitting the weight data and the alarm sound generation data transmitted from the first microprocessor 15. At this time, the key input unit 14 is a power key 141 for power on / off, a numeric key 142 for inputting a specific weight, weight setting for setting the limit value of the excess limit weight and weight change value The key 143, the reset key 144 for initializing the limit value of the excess limit weight and the weight change value. The weight sensing side display unit 16 includes a weight display unit 161 of an LED and an LCD for displaying a weight numerically, and a power on / off display unit 162 of a light emitting diode indicating whether power is supplied.

On the other hand, the remote receiving terminal 2, the receiver 21 for receiving the weight data and the alarm sound generation data transmitted from the transmitter 19, and the signal amplification signal amplified by the signal received from the receiver 21 A unit 22, a filter 23 for filtering the amplified signal, and a process for outputting a display signal of weight data by processing the filtered data and outputting an alarm sound generation signal of alarm sound generation data; Two microprocessors 24, a receiving side display portion 25 for expressing the weight by the display signal, and a receiving side alarm sound generating portion 26 for generating an alarm sound by the alarm sound generation signal. have.

2 is a detailed circuit diagram of a part of the control block of the weight sensing terminal according to an embodiment of the present invention. As shown in FIG. 2, the displacement sensing unit 11 specifically uses a strain gauge type load cell. Herein, the load cell converts the physical deformation of the hook into electrical resistance change using a strain gauge and converts it into an electrical signal using the feature of the Wheatstone bridge circuit. Since this is a general known area, detailed description thereof will be omitted.

The load cell is provided with a first resistor R1 and a second resistor R2 to be connected to the amplifier 121, and the amplifier 121 specifically means a differential amplifier. The first resistor R1 is connected to the non-inverting terminal of the amplifier 121, the second resistor R2 is connected to the inverting terminal of the amplifier 121, and the output terminal of the amplifier 121 is the third resistor R3. Is placed to be connected between the first resistor R1 and the non-inverting terminal. In addition, a pulse generator made of a fourth resistor R4 and a second capacitor C2 is connected between the second resistor R2 and the inverting terminal.

Meanwhile, the first capacitor C1 is placed between the first resistor R1 and the non-inverting terminal of the amplifier 121 and output to the A / D converter 13. The A / D converter 13 ) Consists of a first comparator 131 and a second comparator 132 connecting the non-inverting terminals to the first capacitor C1, respectively, and compares the input voltage and outputs the result as a binary value. To this end, the output terminal of the first comparator 131 is connected to the inverting terminal of the first comparator 131 and at the same time is provided with a fifth resistor R5 to be connected to the inverting terminal of the second comparator 132. The output terminal of the second comparator 132 is connected to terminal 12 of the first microprocessor 15.

The first microprocessor 15 is connected to a key input unit 14 supporting user manipulation, and is connected to each terminal for control of the weight sensing side display unit 16 and the transmitter 19. The first microprocessor 15 may be connected to the weight-sensing side alarm sound generating unit 17. In the present invention, a separate memory 18 is provided, but may be internally embedded therein, and a timer and a counter are also built in. Can be.

3 is a view schematically showing a charging circuit used in the present invention. As shown in FIG. 3, when the AC 4 supplied from the outside (220V AC) is input to the battery charging circuit 3 and the battery 4 is set to a low voltage, the battery 4 is controlled by switching such as a transistor. The batteries 4 are connected in parallel so that the charging voltage can be supplied. This is because the weight detection terminal (1) attached to the hook is applied to the construction site, etc. so as not to interfere with wiring problems and work. In other words, a rechargeable battery charging circuit 3 and a battery 4 are provided for the purpose of manufacturing the weight sensing terminal 1 that can be moved and carried.

4 is a flowchart illustrating a control method of a crane hook hanger weight sensing system according to an embodiment of the present invention. As shown in FIG. 4, first, the weight sensing terminal 1 is initialized and the remote receiving terminal 2 is also initialized. In this initialization process, the weight sensing terminal 1 is the remote receiving terminal 2. It will be recognized (S1). After that, if the initialization is made, the limit value of the weight change value according to the excess weight and movement by the ground hanger worker is set (S2). In other words, the weight of the material can be set arbitrarily by the ground-line worker to apply it to various materials, and when the weight of the material changes severely according to the working environment during movement, it alerts it and carries out the action of the crane driver. In order to monitor the change of the value on the move, the above-mentioned limit value of the excess weight and material weight change is arbitrarily set.

On the other hand, when the ground rope worker binds the material, the material is raised to an arbitrary height (S3) to calculate the weight of the material (S4). Here, the above-mentioned arbitrary height is a height for checking the weight of the material, so that only a slight distance from the ground is required. Subsequently, the weight is calculated by checking the displacement of the hook described in FIG. 2.

At this time, it is determined whether or not the weight of the material is exceeded (S5), when the determination result is determined that the weight is exceeded (Yes) and displays the excess weight on the weight detection terminal 1 and generates an alarm sound (S6). At the same time and transmits the excess weight and the alarm sound generation signal to the remote receiving terminal (2) (S7). Accordingly, the remote receiving terminal 2 receives and processes the excess weight and the alarm sound generation signal and outputs the signal (S8). The crane driver will recognize this and take appropriate action (S9). In other words, the material is lowered back to the ground to allow the worker on the ground to adjust the weight of the material.

On the other hand, if it is determined in the step S5 whether the weight is exceeded, if it is determined that the excess limit weight is not exceeded (No), the material weight is displayed on the weight sensing terminal 1 and the remote sensing terminal to indicate that it is normal (S10). After the transport is made (S11), at this time, it is determined whether the change value of the material weight detected from the displacement sensing unit 11 during transportation by the change of the working environment exceeds the set value (S12). That is, the factor of change in the weight of the material during transportation may be severe wind or collision with other objects. On the other hand, if the weight of the material does not exceed the set value (No), the transport is continued to the corresponding destination, and if the weight of the material exceeds the set value (Yes), the weight change amount and the alarm sound are sent to the remote receiving terminal (2). Transmitting the data to generate the processed by the remote receiving terminal (2) to generate a weight change amount and an alarm sound (S13). After that, follow-up actions are taken by the crane driver's awareness.

As described above, the crane hook hook weight detection alarm system according to the present invention, the ground hook worker who is exposed to the risk can easily know the weight and overload of the material to minimize the risk factor and easily prevent the overload function This can be checked and industrial accidents can be reduced by sharing the same information with the crane operator. In addition, the present invention uses a portable weight-sensing terminal that can be used in small businesses or difficult to supply power, so the maintenance is simple. In addition, since the circuit has a simple structure in the design of the circuit, product weight and manufacturing cost can be reduced.

The present invention is not limited to the above-described embodiment, it will be apparent that many modifications are possible by those skilled in the art within the technical idea of the present invention.

Claims (4)

A displacement detection unit mounted on a hook of a crane to detect a displacement of the hook and output a displacement signal; An amplifier for amplifying the displacement signal; An A / D converter configured to output the amplified signal as binarized weight data by comparing the signal with a reference voltage; A first microprocessor which receives and processes the weight data to output a weight display signal and an alarm sound generation signal according to the excess weight, and process a key input signal input by a user operation; A display unit which displays the weight by the weight display signal; An alarm sound generating unit for generating an alarm sound by the alarm sound generating signal; And a transmitter for transmitting the weight data and the alarm sound generation data transmitted from the first microprocessor. A receiver which receives the weight data and the alarm sound generation data transmitted from the transmitter; A signal amplifier for amplifying the signal transmitted from the receiver; A filter for filtering the amplified signal; A second microprocessor configured to process the filtered data to output a display signal of weight data and to output an alarm sound generation signal of alarm sound generation data; A display unit which displays the weight by the display signal; And an alarm sound generating unit generating an alarm sound by the alarm sound generating signal. Crane hook hanger weight detection alarm system comprising a. The crane hook hanger weight detection alarm system according to claim 1, wherein the displacement sensing unit uses a strain gauge load cell. The crane hook hanger weight sensing alarm system according to claim 1, wherein the amplifying part of the weight sensing terminal uses a differential amplifier. The power supply of claim 1, wherein the power supply of the weight sensing terminal comprises: a battery charging circuit configured to perform charging according to the state of charge of the battery with respect to the power supplied from the outside; Crane hook hanger weight detection alarm system, characterized in that made by.