A movable volume measurement device and method based on shipyard containers

Abstract

The invention discloses a movable volume measurement device and method based on a shipyard container, which relates to the technical field of volume measurement equipment. The device comprises a movable bracket, a controller, and three laser distance measuring mechanisms arranged along the X, Y and Z directions. The bracket is in a triangular prism shape, and a three-layer support plate is provided on the bracket. The controller is fixed on the bottom support plate of the bracket. The laser distance measuring machine comprises a laser distance meter, a fixed plate, a rotating slide, and a fixed bracket. The laser distance meter is fixedly connected to the fixed plate. A single-chip microcomputer is provided in the controller for control and calculation. A lithium battery is provided on the bottom support plate of the movable bracket for power supply of the controller. A display screen is provided on the second support plate of the movable bracket. The invention adopts mobile measurement, and there is no need to transport the container to a designated location, thus avoiding tedious operations and saving time. By adopting a method combining an automatic rotating slide and laser distance measurement, the calculation is simple and no complex algorithm is required for solution.

Description

Technical Field

[0001] The present invention belongs to the technical field of volume measurement equipment, and in particular relates to a movable volume measurement device and method based on a shipyard container. Background Art

[0002] Volume measurement is already a common technology. There are many methods for volume measurement, such as infrared measurement, ultrasonic measurement, visual measurement, etc. However, there is still no better method for measuring large containers in shipyards.

[0003] There are many kinds of cargo in shipyards, and the sizes are different. It is relatively easy to measure small cargo, but it is more difficult to measure large objects. At present, the better measurement method is to fix the container in a specific position, perform visual inspection, and then solve it through complex algorithms. This method is suitable for relatively small cargo and relatively fixed positions. However, in shipyards, many containers need to be transported to fixed locations for measurement, which is time-consuming and labor-intensive, and the operation is relatively cumbersome. Therefore, we propose a movable volume measurement device and method based on shipyard containers. Summary of the invention

[0004] In view of the deficiencies in the prior art, an object of the present invention is to provide a movable volume measurement device and method based on a shipyard container to solve the problems raised in the above background technology.

[0005] The object of the present invention can be achieved through the following technical solutions: A movable volume measuring device based on a shipyard container, comprising a movable bracket, a controller, and three laser ranging mechanisms arranged along the X, Y, and Z directions, the movable bracket is in the shape of a triangular prism, and a three-layer support plate is provided on the movable bracket, the controller is fixed on the bottom support plate of the movable bracket, any of the laser ranging mechanisms is fixedly connected to the movable bracket, the laser rangefinder comprises a laser rangefinder, a fixed plate, a rotating slide, and a fixed bracket, the laser rangefinder is fixedly connected to the fixed plate, the fixed plate is fixedly connected to the rotating slide, the rotating slide is rotatably connected to the fixed bracket, the rotating slide is connected to a stepping motor, the controller is connected to the laser ranging mechanism, a single-chip microcomputer is provided in the controller for control and calculation, a lithium battery is provided on the bottom support plate of the movable bracket for power supply of the controller, and a display screen is provided on the second support plate of the movable bracket.

[0006] As a further solution of the present invention, the three-way driving signal in the controller is connected to the stepper motor drive control board in the rotating slide in the X, Y and Z directions, J1 of the single chip microcomputer in the controller is connected to the laser rangefinder in the X, Y and Z directions, J2 in the single chip microcomputer in the controller is connected to the display screen through the serial port, the laser ranging mechanism in the X and Y directions is fixed on the top support plate of the mobile bracket, and the laser ranging mechanism in the Z direction is fixed on the side of the mobile bracket.

[0007] As a further solution of the present invention, the single chip microcomputer in the controller is a main control chip STM32F103ZET6, and the controller also includes an RS485 serial port conversion circuit.

[0008] As a further solution of the present invention, the laser rangefinder is selected as model SK-Z-30, and the communication mode is ModbusRTU.

[0009] As a further solution of the present invention, the controller also includes a data transmission and display module, which is composed of a main control chip U1, a wireless transmission module U2 and a 232 serial port conversion circuit. The main control chip U1 is connected to the wireless transmission module U2. The model selected for U2 is ESP-I2S. The function of U2 is to transmit the calculated volume data to the cloud. The main control chip U1 is connected to the sending and receiving ends of the serial port display screen after 232 level conversion. The display screen shown is selected as model DMT80480C070_04W.

[0010] As a further solution of the present invention, the measuring method comprises the following steps: setting a timing cycle and a duty cycle, controlling the stepper motor of the rotary slide to rotate at a constant speed, driving the rotary slide to rotate at a fixed step angle, and at the same time starting a counter by the controller, measuring the distance returned by the laser rangefinder once each time the stepper motor rotates, and determining the starting point and the ending point of the measurement by comparing the distance values ​​returned twice before and after;

[0011] When the two distance values ​​are greater than the set threshold, the start and end of the count value are obtained, and the distance values ​​returned at the start and end are recorded at the same time. The count difference at the start and end is multiplied by the step angle of the automatic rotating table to get the rotation angle. Through the triangular cosine theorem, the length, width and height values ​​of the measured object are obtained, and the volume of the measured object can be calculated.

[0012] Beneficial effects of the invention: The volume measuring device disclosed in the invention can quickly realize volume measurement of regular objects such as containers in shipyards by combining laser ranging technology and stepper motor control of rotation angle, can display measurement data in real time, and can upload measurement data to the cloud wirelessly; at the same time, there is no need to move goods, thereby reducing the labor intensity of workers and improving measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the partially enlarged structure of the automatic rotating slide of the present invention.

[0016] Figure 3 This is a schematic diagram of the control board circuit of the present invention.

[0017] In the figure: 1 mobile bracket, 2 display screen, 3 lithium battery pack, 4 control circuit board, 5 mobile pulley, 6 laser rangefinder, 7 fixed plate, 8 rotating slide, 9 rotating table fixing bracket. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figure 1 , 2As shown, a movable volume measurement device and method based on a shipyard container includes a movable bracket 1, a display screen 2, a lithium battery 3, a controller 4, a movable pulley 5, and three laser distance measurement mechanisms of X, Y, and Z. The movable bracket is in the shape of a triangular prism, and a three-layer support plate is provided on the movable bracket, wherein the laser distance measurement mechanism is composed of a laser distance meter 6, a fixed plate 7, a rotating slide 8, and a rotating stage fixed bracket 9; the lithium battery 3 outputs a 24V voltage, which is connected to the controller 4 to power the control board, and the three-way driving signal in the controller 4 is connected to the motor drive control board in the rotating slide 8 of X, Y, and Z, and J1 in the controller 4 is connected to the laser distance meter 6 in X, Y, and Z. The lithium battery 3 and the controller 4 are fixed at the bottom of the movable bracket 1, the display screen 2 is fixed in the middle of the movable bracket 1, and J2 in the controller 4 is connected to the display screen 2 through a serial port, the X and Y automatic rotating slides are fixed on the top of the movable bracket 1, and the Z automatic rotating slide is fixed on the side of the movable bracket. The laser rangefinder 6 is connected to the automatic rotating slide 8 through the fixing device 7, and the rotating slide 8 is connected to the mobile bracket 1 through the rotating table fixing bracket. The device specifically realizes three functions: 1. The mobile measuring device is close to the measured object through the pulley to realize the movable volume measurement; 2. The control and measurement unit is a control unit module composed of a lithium battery 3, a controller 4 and three laser ranging mechanisms of X, Y, and Z; 3. The data transmission and display module is composed of a display screen 2 and a controller 4. The data is displayed through the display screen, and the data is uploaded to the cloud through the WIFI module for easy storage.

[0020] like Figure 3As shown, the control circuit is composed of the main control chip STM32F103ZET6, the motor drive board, the rotating slide, the laser ranging module, the serial port conversion circuit, and the ESP-12S wireless module. The 34th, 35th, 36th, and 37th pins of U1 are respectively connected to the first, second, third, and fourth pins of CN2 of the X-axis motor drive board, and the first, second, third, fourth, and fifth pins of the CN3 terminal of the X-axis motor drive board are respectively connected to the first, second, third, fourth, and fifth pins of the X-axis automatic rotating slide; the 60th, 64th, 66th, and 67th pins of U1 are respectively connected to the first, second, third, and fourth pins of CN2 of the Y-axis motor drive board, and the Y-axis motor The first, second, third, fourth and fifth pins of the CN3 terminal of the driving board are respectively connected to the first, second, third, fourth and fifth pins of the Y-axis automatic rotating slide; the 81st, 82nd, 83rd and 84th pins of U1 are respectively connected to the first, second, third and fourth pins of CN2 of the Z-axis motor driving board, and the first, second, third, fourth and fifth pins of the CN3 terminal of the Z-axis motor driving board are respectively connected to the first, second, third, fourth and fifth pins of the Z-axis automatic rotating slide.

[0021] Furthermore, the 119th and 122nd pins of U1 are connected to the transceiver of the three-way laser rangefinder after 485 level conversion. The distances of the X-axis, Y-axis and Z-axis are calculated respectively. The laser rangefinder is SK-Z-30 and the communication mode is ModbusRTU.

[0022] Furthermore, the 111th and 112th pins of the U1 are connected to the sending and receiving ends of the serial port display screen after 232 level conversion. The display screen shown is model DMT80480C070_04W, which is used for interface data display and operation.

[0023] Furthermore, the 101st and 102nd pins of U1 are connected to the 15th and 16th pins of U2 respectively, the 49th pin of U1 is connected to the 1st pin of U2, the 50th pin of U1 is connected to the 2nd pin of U2, the model of U2 is ESP-I2S, and the function of U2 is to transmit the calculated volume data to the cloud for storage.

[0024] Furthermore, the volume measuring device is powered by a 24V lithium battery, connected to the controller 4 and the X, Y, and Z axis motor drive circuit boards, uses low power consumption technology, and has a long power storage time.

[0025] Furthermore, the specific use steps of the volume measurement device are as follows: start the display interface volume measurement switch, set the timing cycle and duty cycle, control the stepper motor to rotate at a constant speed, drive the automatic rotating table to rotate at a fixed step angle, and start the counter at the same time. The stepper motor measures the distance returned by the laser rangefinder every time it rotates one step. By comparing the distance values ​​returned twice, the starting point and the end point of the measurement are determined; when the two distance values ​​are greater than the set threshold, the start and end of the count value are obtained, and the distance values ​​returned at the start and end are recorded at the same time. The count difference at the start and end is multiplied by the step angle of the automatic rotating table to obtain the rotation angle. Through the triangular cosine theorem, the length, width and height values ​​of the measured object are obtained, and the volume of the measured object can be calculated. At this time, the measured volume value is returned to the display screen, and the measured value is uploaded to the cloud for subsequent operations.

[0026] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed or operate in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0028] For those skilled in the art, it is understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. Therefore, from any point of view, the embodiments should be regarded as instructive and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. It is only a preferred embodiment of the present invention and is not intended to limit the present invention. All modifications, equivalent substitutions, improvements, etc. within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A movable volume measuring device based on a shipyard container, characterized in that: The invention comprises a mobile support (1), a controller (4), and three laser distance measuring mechanisms arranged along the X, Y and Z directions. The mobile support (1) is in the shape of a triangular prism. The mobile support (1) is provided with three layers of support plates. The controller (4) is fixed on the bottom support plate of the mobile support (1). Any of the laser distance measuring mechanisms is fixedly connected to the mobile support (1). The laser distance measuring machine comprises a laser distance measuring instrument (6), a fixed plate (7), a rotating slide (8), and a rotating slide fixed support (9). The laser distance measuring instrument (6) is fixedly connected to the fixed plate (7). The fixed plate (7) is fixedly connected to the rotating slide (8). The rotating slide (8) is rotatably connected to the rotating slide fixed support (9). The rotating slide (8) is connected to a stepping motor. The controller (4) is connected to the laser distance measuring mechanism. A single chip microcomputer is provided in the controller (4) for control and calculation. A lithium battery (3) is provided on the bottom support plate of the mobile support (1) for powering the controller (4). A display screen (2) is provided on the second support plate of the mobile support (1). The three-way driving signal in the controller (4) is connected to the stepper motor driving control board in the rotating slide (8) in the X, Y and Z directions, J1 of the single chip microcomputer in the controller (4) is connected to the laser distance meter (6) in the X, Y and Z directions, J2 in the single chip microcomputer in the controller (4) is connected to the display screen (2) through the serial port, the laser distance measurement mechanism in the X and Y directions is fixed on the top support plate of the mobile bracket (1), and the laser distance measurement mechanism in the Z direction is fixed on the side of the mobile bracket (1); The lithium battery (3) outputs a 24V voltage, which is connected to a controller (4) to supply power to a control board, wherein the control board is composed of a main control chip STM32F103ZET6, a motor drive board, a rotary slide, a laser rangefinder, a serial port conversion circuit, and an ESP-12S wireless module; The measuring method comprises the following steps: setting a timing cycle and a duty cycle, controlling a stepper motor of a rotary slide (8) to rotate at a constant speed, driving the rotary slide (8) to rotate at a fixed step angle, and at the same time starting a counter by a controller (4), measuring the distance returned by a laser rangefinder (6) once each time the stepper motor rotates one step, and determining the starting point and the ending point of the measurement by comparing the distance values ​​returned twice before and after; When the two distance values ​​are greater than the set threshold, the start and end of the count value are obtained, and the distance values ​​returned at the start and end are recorded at the same time. The count difference at the start and end is multiplied by the step angle of the automatic rotating table to get the rotation angle. Through the triangular cosine theorem, the length, width and height values ​​of the measured object are obtained, and the volume of the measured object can be calculated.

2. The movable volume measuring device based on a shipyard container according to claim 1, characterized in that: The single chip microcomputer in the controller (4) is a main control chip STM32F103ZET6, and the controller (4) also includes an RS485 serial port conversion circuit.

3. The movable volume measuring device based on a shipyard container according to claim 2, characterized in that: The laser rangefinder is of model SK-Z-30 and the communication mode is ModbusRTU.

4. The movable volume measuring device based on a shipyard container according to claim 3 is characterized in that: The controller 4 also includes a data transmission and display module, which is composed of a main control chip U1, a wireless transmission module U2 and a 232 serial port conversion circuit. The main control chip U1 is connected to the wireless transmission module U2. The model selected for U2 is ESP-I2S. The function of U2 is to transmit the calculated volume data to the cloud. The main control chip U1 is connected to the sending and receiving ends of the serial port display screen (2) after 232 level conversion. The display screen (2) is selected as DMT80480C070_04W.

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