Digital weighing device for a ship, weighing method and weighing system

Abstract

The application discloses a ship digital weighing device, a weighing method and a weighing system, wherein the weighing device comprises a detection cavity, a weighing sensor for measuring the pressure of the detection cavity to obtain corresponding detection data, and a reset structure for connecting the detection cavity with an external water source during the weighing process, and for draining the water in the detection cavity after the weighing is completed, so that the weighing sensor returns to the initial state, and then the detection cavity is in a sealed state. The ship loading capacity is related to the draft depth, and the underwater depth is related to the pressure. The water pressure is detected by the weighing sensor, the weighing of the ship and / or the ship loading capacity is determined based on the detected pressure signal, the precision is higher compared with the prior art, and the weighing result is more accurate. The weighing sensor is only pressed during the weighing work through the design of the detection cavity and the reset structure, so that the weighing precision is guaranteed, and the service life of the weighing sensor is prolonged.

Description

Technical Field

[0001] This invention relates to the field of weighing, and more particularly to a digital weighing technology for ships. Background Technology

[0002] Currently, weighing in the shipbuilding industry is mostly done by land-based trucks and various weighing tools, which affects the development and operation of the shipbuilding industry.

[0003] The current method for weighing and measuring cargo loaded on ships is as follows:

[0004] The method of marking several lines on the outer surface of the hull to represent the load capacity corresponding to different drafts is extremely flawed. Summary of the Invention

[0005] This invention addresses the lack of a high-precision ship weighing device in the prior art by providing a ship digital weighing device, as well as a ship digital weighing method and system implemented using the weighing device.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A digital weighing device for ships, comprising:

[0008] Detection chamber;

[0009] A weighing sensor is used to measure the pressure in the detection chamber and obtain corresponding detection data;

[0010] The reset structure is used to connect the detection chamber to an external water source during the weighing process, and also to drain the water from the detection chamber after the weighing is completed, so that the weighing sensor returns to its initial state and the detection chamber is sealed.

[0011] As one possible implementation method:

[0012] The weighing sensor includes a hollow housing with a front opening and a rear opening;

[0013] An elastic body is provided at the front opening;

[0014] A rear cover is provided at the rear opening;

[0015] The elastomer, the back cover, and the housing together form a sealed inner cavity. When there is a pressure difference between the detection cavity and the inner cavity, the elastomer deforms.

[0016] The inner cavity is equipped with a sensor and a signal processor. The sensor is mounted on the elastic body and is used to detect the deformation of the elastic body, thereby generating a corresponding pressure signal. The signal processor is used to amplify the pressure signal and obtain corresponding detection data.

[0017] As one possible implementation method:

[0018] A protective net is also provided at the front opening, and the elastomer is connected to the detection cavity through the protective net.

[0019] As one possible implementation method:

[0020] The shell is a cylindrical body.

[0021] As one possible implementation method:

[0022] The sensing element is a resistance strain gauge or a silicon sensing element.

[0023] As one possible implementation, the reset structure includes:

[0024] An exhalation duct, used to connect the detection chamber to an external water source;

[0025] An exhalation valve is installed on the exhalation duct;

[0026] A water pipe is used to connect the detection chamber to an external water source;

[0027] A water valve is installed on the water pipe;

[0028] A submersible pump, connected to the water pipe, is used to extract water from the detection chamber through the water pipe, thereby resetting the weighing sensor.

[0029] As one possible implementation method:

[0030] Both the exhalation valve and the water valve are submersible valves.

[0031] As one possible implementation, a support frame is also included;

[0032] The bracket is used to fix the weighing sensor to the hull.

[0033] A digital weighing method for ships, implemented using any one of the ship digital weighing devices described above;

[0034] This includes the weighing step, the specific steps of which are as follows:

[0035] Based on the weighing command, the control reset structure connects the detection chamber to the external water source, and the weighing sensor measures the pressure in the detection chamber to obtain the corresponding detection data.

[0036] Acquire the detection data, generate corresponding weighing data based on the detection data, and display it;

[0037] It also includes a reset step, the specific steps of which are as follows:

[0038] Based on the reset command, the reset structure is controlled to perform the following steps:

[0039] Drain the water from the detection chamber until the weighing sensor returns to its initial state, at which point keep the detection chamber sealed.

[0040] A ship digital weighing system includes a control system and a ship digital weighing device as described in any one of the above.

[0041] The control system:

[0042] Used to control the operation of the ship's digital weighing device based on weighing commands and reset commands;

[0043] It is also used to receive the detection data obtained by the ship's digital weighing device, and to generate and display the corresponding weighing data based on the detection data.

[0044] This invention, by adopting the above technical solutions, has significant technical effects:

[0045] This invention addresses the relationship between ship load capacity and draft, and between underwater depth and pressure. It uses a weighing sensor to detect water pressure and determines the ship's weight and / or cargo capacity based on the detected pressure signal. Compared with existing technologies, this invention offers higher precision and more accurate weighing results.

[0046] This invention, through the design of the detection cavity and reset structure, ensures that the load cell is only subjected to pressure during weighing operations, thereby guaranteeing weighing accuracy and extending the service life of the load cell. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is a structural schematic diagram of a digital weighing device for ships according to the present invention;

[0049] Figure 2 This is a front view schematic diagram of the elastomer and the back cover in Example 1;

[0050] Figure 3This is a cross-sectional schematic diagram of the elastomer in Example 1;

[0051] Figure 4 This is a front view schematic diagram of the shell in Embodiment 1;

[0052] Figure 5 This is a cross-sectional schematic diagram of the shell in Embodiment 1;

[0053] Figure 6 This is a front view schematic diagram of the protective netting in Example 1.

[0054] In the picture:

[0055] 100 is the load cell; 110 is the housing; 120 is the elastomer; 130 is the back cover; 140 is the inner cavity; 150 is the protective mesh.

[0056] 200 is the detection chamber;

[0057] 300 is the reset structure; 311 is the exhalation channel; 312 is the exhalation valve; 321 is the water pipe; 322 is the water valve; 330 is the submersible pump 330. Detailed Implementation

[0058] The present invention will be further described in detail below with reference to the embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0059] Example 1: A digital weighing device for ships, such as... Figure 1 As shown, it includes:

[0060] Detection chamber 200;

[0061] The weighing sensor 100 is used to measure the pressure in the detection chamber 200 and obtain corresponding detection data;

[0062] The reset structure 300 is used to connect the detection chamber 200 to an external water source during the weighing process, and also to drain the water from the detection chamber 200 after the weighing is completed, so that the weighing sensor 100 returns to its initial state and the detection chamber 200 is in a sealed state.

[0063] In this embodiment, the initial state refers to the state in which the elastic body 120 in the weighing sensor 100 is not deformed by pressure, at which time the weighing sensor is at zero position.

[0064] In practical applications, the weighing device is fixed to the underwater hull of the ship. The underwater hull refers to the part of the ship that is in the water when it is unloaded. In this embodiment, the weighing device is located at a depth of 20-50 cm when the ship is unloaded.

[0065] When the detection chamber 200 is connected to an external water source, that is, the detection chamber 200 and the external water source form a communicating vessel, the pressure at the same depth in the communicating vessel is equal. Therefore, the pressure in the detection chamber 200 can indicate the depth at which the ship sinks. That is, as the cargo is loaded, the ship sinks, and the weighing device sinks accordingly. The water pressure in the detection chamber 200 increases as the weighing device sinks. The ship's load and the change in pressure in the detection chamber 200 have a linear relationship. Therefore, in this embodiment, the pressure in the detection chamber 200 can be measured by the elastic body 120 in the weighing sensor 100, thereby realizing the weighing of the ship and its cargo.

[0066] To ensure the accuracy of the weighing results, the position of the weighing device needs to be fixed. However, if the weighing sensor 100 is submerged in water and subjected to pressure for a long time, it will affect the accuracy and lifespan of the elastic body 120. In this embodiment, through the design of the detection cavity 200 and the reset structure 300, the water in the detection cavity 200 can be drained through the reset structure 300 after the weighing operation is completed, so that the weighing sensor 100 returns to its initial state and the detection cavity 200 is sealed, so that the weighing sensor 100 maintains its initial state, which can ensure the weighing accuracy and extend the service life of the weighing sensor 100.

[0067] Note that those skilled in the art can set the initial state of the weighing sensor 100 according to actual needs.

[0068] Furthermore, referring to Figures 1 to 5 :

[0069] The weighing sensor 100 includes a hollow housing 110, which has a front opening and a rear opening. In this embodiment, the housing 110 is a cylindrical body.

[0070] An elastic body 120 is provided at the front opening. In this embodiment, the elastic body 120 is a metallic elastic body.

[0071] The rear opening is provided with a rear cover 130;

[0072] The elastomer 120, the rear cover 130, and the housing 110 together form a sealed inner cavity 140. In this embodiment, the elastomer 120 abuts against the detection cavity 200. When there is a pressure difference between the detection cavity 200 and the inner cavity 140, the elastomer 120 deforms.

[0073] The inner cavity 140 is equipped with a sensor and a signal processor;

[0074] The sensing element is mounted on the elastic body 120 to detect the deformation of the elastic body 120 and generate a corresponding pressure signal. The sensing element is a resistance strain gauge or a silicon sensing element.

[0075] The signal processor is used to amplify the pressure signal to obtain corresponding detection data.

[0076] In this embodiment, to reduce weight, the housing 110 and the rear cover 130 are made of industrial plastic or nylon, etc. The elastomer 120 and the rear cover 130 are fixed to the housing 110 with screws and sealed with sealing rolls and glue to form a sealed cylindrical container.

[0077] Furthermore, the inner cavity 140 is also provided with a data transmission module for transmitting the detection data to an external control system, whereby the external control system generates and displays the corresponding weighing data.

[0078] In this embodiment, the data transmission module is a CAN bus transmission unit or a 485 bus transmission unit.

[0079] Furthermore, a protective net 150 is provided at the front opening, and the elastic body 120 is connected to the detection cavity 200 through the protective net 150.

[0080] To prevent foreign objects in the external water source from affecting the normal operation of the weighing sensor 100, a protective net 150 is provided at the front end of the elastomer 120 (the end away from the rear cover 130) in this embodiment.

[0081] Reference Figure 6 In this embodiment, the protective net 150 has several through holes, allowing the elastic body 120 to connect with the detection cavity 200 through the through holes, thereby enabling the weighing sensor 100 to normally measure the pressure inside the detection cavity 200.

[0082] Furthermore:

[0083] The reset structure 300 includes:

[0084] The exhalation channel 311 is used to connect the detection chamber 200 to an external water source, and to provide a channel for the gas in the detection chamber 200 to be discharged.

[0085] An exhalation valve 312 is disposed on the exhalation channel 311;

[0086] Water pipe 321 is used to connect the detection chamber 200 to an external water source;

[0087] Water valve 322 is installed on the water pipe 321;

[0088] A submersible pump 330 is connected to the water pipe 321 and is used to extract water from the detection chamber 200 through the water pipe 321 to reset the weighing sensor 100.

[0089] In practical applications, the working function of the reset structure 300 is as follows:

[0090] When not weighing, the submersible pump 330 is not working, the exhalation valve 312 and the water valve 322 are both closed, the detection chamber 200 is a sealed chamber, and the load cell 100 is in the initial state.

[0091] When weighing is being performed, the submersible pump 330 is not working, the exhalation valve 312 and the water valve 322 are both open, the detection chamber 200 is connected to the external water source through the exhalation channel 311, and is also connected to the external water source through the water pipe 321. At this time, the detection chamber 200 and the external water source form a communicating vessel, and the pressure of the detection chamber 200 can reflect the depth of the weighing device underwater.

[0092] When performing a reset operation:

[0093] When the exhalation valve 312 is opened, the water valve 322 is closed and the submersible pump 300 is not working. If there is gas in the detection chamber 200, the gas is discharged through the exhalation channel 311 and the exhalation valve 312, so that the detection chamber 200 is filled with water.

[0094] After the exhalation valve 312 has been open for a preset time, the exhalation valve 312 is closed, the water valve 322 is opened, and the submersible pump 330 is activated. Both the exhalation valve 312 and the water valve 322 are in the open state. The submersible pump 330 draws water out of the detection chamber 200 through the water pipe 321 until there is no pressure difference between the detection chamber 200 and the inner cavity 140 of the load cell 100. That is, the elastic body 120 in the load cell 100 is reset. At this time, the water valve 322 is closed, and the submersible pump 330 is stopped, so that the detection chamber 200 is sealed, thereby keeping the elastic body 120 in its initial state.

[0095] In practical applications, air may occasionally remain in the detection chamber 200. When resetting, if there is air in the detection chamber 200, the submersible pump 300 will not be able to quickly and efficiently extract the water from the detection chamber 200. Therefore, this embodiment uses the design of the exhalation valve 312 to open the exhalation valve 312 for a preset time (3s) and then close it to ensure that the detection chamber 200 is full of water, thereby ensuring that the submersible pump 300 can perform drainage work normally.

[0096] In practical applications, the detection chamber 200 is small in size, and the submersible pump 300 can achieve the reset requirement in just 1 second when working normally. According to the test, when there is air in the detection chamber 200, the submersible pump 300 may not be able to reset the elastomer 120 even if it works for more than 30 minutes. However, if the exhalation valve 312 is opened and closed after 3 seconds, and then the water valve 322 is opened and the submersible pump 300 is controlled to work, the reset can be completed in just 1 second.

[0097] In practical applications, the submersible pump 330, exhalation valve 312 and water valve 322 can be controlled by an external control system via CAN or 485 bus. The weighing device also includes a built-in control module, which receives weighing commands and reset commands from the external control system and controls the submersible pump 330, exhalation valve 312 and water valve 322 based on the weighing commands and service commands.

[0098] In this embodiment, both the exhalation valve 312 and the water valve 322 are submersible valves.

[0099] Furthermore, the weighing device also includes a support frame;

[0100] The bracket is used to fix the weighing sensor 100 to the hull.

[0101] Example 2: A digital weighing method for ships, implemented using the digital weighing device for ships described in Example 1;

[0102] The weighing method includes a weighing step and a resetting step;

[0103] The specific steps of the weighing process are as follows:

[0104] S110. Based on the weighing command, the control reset structure 300 connects the detection chamber 200 to the external water source, and the weighing sensor 100 measures the pressure in the detection chamber 200 to obtain the corresponding detection data.

[0105] That is, by controlling the opening of the exhalation valve 312 and the water valve 322, the detection chamber 200 is connected to the external water source through the water pipe 321 and the exhalation channel 311. At this time, the external water source enters the detection chamber 200 through the water pipe 321, and the air in the detection chamber 200 is discharged through the exhalation channel 311. At this time, the pressure of the detection chamber 200 corresponds to the depth of the weighing device.

[0106] A pressure difference is generated between the detection chamber 200 and the inner cavity 140 of the weighing sensor 100, and the elastic body 120 of the weighing sensor 100 deforms. At this time, the sensing sheet set in the elastic body 120 generates a corresponding pressure signal, and the pressure signal is processed by a signal processor to obtain the corresponding detection data.

[0107] S120. Acquire the detection data, generate corresponding weighing data based on the detection data, and display it;

[0108] In this embodiment, the signal processor transmits the detection data via a CAN bus or a 485 bus;

[0109] The specific steps of the reset step are as follows:

[0110] Based on the reset command, the reset structure 300 is controlled to perform the following steps:

[0111] Drain the water from the detection chamber 200 until the weighing sensor 100 returns to its initial state, at which point keep the detection chamber 200 sealed.

[0112] The specific steps are as follows:

[0113] First, the exhalation valve 312 is opened for a preset time (e.g., 3 seconds) and then closed. This scheme is to ensure that the detection chamber 200 is filled with water. That is, if there is air in the detection chamber 200, when the exhalation valve 312 is opened, the air will be discharged through the exhalation channel 311 and the exhalation valve 312.

[0114] Then, control the water valve 322 to open and control the submersible pump 330 to work. At this time, the submersible pump 330 will draw water out of the detection chamber 200 through the water pipe 321 until there is no pressure difference between the detection chamber 200 and the inner cavity 140 of the weighing sensor 100, that is, the elastic body 120 of the weighing sensor 100 is reset.

[0115] Based on the detection data, after the elastic body 120 of the weighing sensor 100 is reset, the submersible pump 330 is stopped and the water valve 322 is closed. At this time, the detection chamber 200 is a sealed chamber, so that the detection chamber 200 and the inner cavity 140 of the weighing sensor 100 are kept in a state of no pressure difference, thereby permanently keeping the elastic body 120 of the weighing sensor 100 in its initial state.

[0116] In practical applications, users use the control system to issue weighing commands, which in turn cause the control system to control the reset structure to work, so that the weighing sensors can obtain the detection data corresponding to the ship when it is unloaded. At this time, the control system will generate and display the ship's weight based on the detection data.

[0117] Before loading cargo, the user uses the control system to zero out the load, so that the control system generates and displays the load weight based on the detection data. That is, the load weight corresponding to the ship being empty is zero.

[0118] Once the cargo is loaded, the control system will generate and display the corresponding load capacity based on the detection data.

[0119] After the weighing process is completed, such as after the loading and unloading of goods, the user uses the control system to issue a reset command, causing the control system to control the reset structure 300 to drain the water from the detection chamber 200. During this process, the load cell 100 generates and transmits detection data. When the control system determines that the load cell 100 has returned to zero based on the detection data, the control system controls the reset structure 300 to seal the detection chamber 200, thereby keeping the load cell 100 at zero.

[0120] Example 3: A ship digital weighing system, comprising a control system and the ship digital weighing device described in Example 1;

[0121] The control system:

[0122] Used to control the operation of the ship's digital weighing device based on weighing commands and reset commands;

[0123] It is also used to receive the detection data obtained by the ship's digital weighing device, and to generate and display the corresponding weighing data based on the detection data.

[0124] As the device embodiment is basically similar to the method embodiment, the description is relatively simple, and relevant parts can be found in the description of the method embodiment.

[0125] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0126] It should be noted that:

[0127] The phrase "an embodiment" or "an embodiment" used in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Therefore, the phrase "an embodiment" or "an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0128] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.

[0129] Furthermore, it should be noted that the shapes and names of the parts and components described in the specific embodiments described in this specification may differ. All equivalent or simple variations made to the structure, features, and principles described in this patent concept are included within the protection scope of this patent. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the structure of this invention or exceed the scope defined in these claims, they should all fall within the protection scope of this invention.

Claims

1. A digital weighing device for ships, characterized in that... include: Detection chamber; A weighing sensor is used to measure the pressure in the detection chamber and obtain corresponding detection data; The weighing sensor includes a hollow housing with a front opening and a rear opening; An elastic body is provided at the front opening; A rear cover is provided at the rear opening; The elastomer, the back cover, and the housing together form a sealed inner cavity. When there is a pressure difference between the detection cavity and the inner cavity, the elastomer deforms. The inner cavity is equipped with a sensor and a signal processor. The sensor is mounted on the elastic body and is used to detect the deformation of the elastic body, thereby generating a corresponding pressure signal. The signal processor is used to amplify the pressure signal and obtain corresponding detection data. The reset structure is used to connect the detection chamber to an external water source during the weighing process, and also to drain the water from the detection chamber after the weighing is completed, so that the weighing sensor returns to its initial state and the detection chamber is sealed. The reset structure includes: An exhalation duct, used to connect the detection chamber to an external water source; An exhalation valve is installed on the exhalation duct; A water pipe is used to connect the detection chamber to an external water source; A water valve is installed on the water pipe; A submersible pump, connected to the water pipe, is used to extract water from the detection chamber through the water pipe, thereby resetting the weighing sensor.

2. The ship digital weighing device according to claim 1, characterized in that: A protective net is also provided at the front opening, and the elastomer is connected to the detection cavity through the protective net.

3. The ship digital weighing device according to claim 2, characterized in that: The shell is a cylindrical body.

4. The ship digital weighing device according to claim 3, characterized in that: The sensing element is a resistance strain gauge or a silicon sensing element.

5. The ship digital weighing device according to claim 4, characterized in that: Both the exhalation valve and the water valve are submersible valves.

6. The ship digital weighing device according to claim 1, characterized in that, It also includes a support frame; The bracket is used to fix the weighing sensor to the hull.

7. A digital weighing method for ships, characterized in that, This is achieved using the ship digital weighing device described in any one of claims 1 to 6; This includes the weighing step, the specific steps of which are as follows: Based on the weighing command, the control reset structure connects the detection chamber to the external water source, and the weighing sensor measures the pressure in the detection chamber to obtain the corresponding detection data. Acquire the detection data, generate corresponding weighing data based on the detection data, and display it; It also includes a reset step, the specific steps of which are as follows: Based on the reset command, the reset structure is controlled to perform the following steps: Drain the water from the detection chamber until the weighing sensor returns to its initial state, at which point keep the detection chamber sealed.

8. A digital weighing system for ships, characterized in that, Includes a control system and the ship digital weighing device as described in any one of claims 1 to 6; The control system: Used to control the operation of the ship's digital weighing device based on weighing commands and reset commands; It is also used to receive the detection data obtained by the ship's digital weighing device, and to generate and display the corresponding weighing data based on the detection data.

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