Coal sample apparent density measuring device and coal sample apparent density measuring method based on 3D printing
Through the coal sample visual density measurement device based on 3D printing, the problems of low accuracy and complex operation of coal sample visual density measurement in the prior art are solved, and high-precision measurement of irregular-shaped coal blocks are achieved, and the measurement reliability and efficiency are improved.
Patent Information
- Application Number
- CN202510374535.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2025-06-24
AI Technical Summary
The existing coal sample density measurement methods have low accuracy and complex operation, and it is especially difficult to accurately measure the volume of coal blocks with irregular shapes.
The coal sample visual density measurement device based on 3D printing is used to obtain the three-dimensional model data of the coal sample through a 3D scanner, and the model with the same appearance as the coal sample is printed using 3D printing equipment. The weight and volume of the model and coal sample are measured through an accurate weighing system to calculate the coal sample visual density.
The accuracy and efficiency of coal sample visual density measurement is improved, especially when measuring coal blocks with irregular shapes, the error introduced by human factors is reduced, and the reliability and repeatability of measurement results are improved.
Smart Images
Figure CN120195049A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of coal detection, and relates to a visual density measurement device for coal samples based on 3D printing. The present invention also relates to a method for measuring the visual density of coal samples based on the above measurement device. Background Art
[0002] The visual density of coal is one of the important parameters in coal quality evaluation and industrial applications. It reflects the density characteristics of coal with pores, and is of great significance for coal classification, processing and utilization, and geological exploration.
[0003] Traditional methods for measuring the visual density of coal samples mostly use the drainage method, geometric approximation method, etc. Although the visual density of coal samples can be roughly calculated, there are also many deficiencies in the actual operation process. For example, the drainage method has inaccurate measurement results for some coal samples with strong water absorption, and the operation process is cumbersome, prone to introducing errors; the geometric approximation method is difficult to accurately measure the volume of irregularly shaped coal blocks. Therefore, there is an urgent need for a more accurate and efficient device for measuring the visual density of coal samples. Summary of the Invention
[0004] The first object of the present invention is to provide a visual density measurement device for coal samples based on 3D printing, which solves the problems of low accuracy and complex operation of the existing methods for measuring the visual density of coal samples. The second object of the present invention is to provide a method for measuring the visual density of coal samples based on the above measurement device.
[0005] The first technical solution adopted by the present invention is a visual density measurement device for coal samples based on 3D printing, including a central control system. The central control system is respectively connected to a 3D scanner, a 3D printing device and a weighing system through data lines, and the central control system is also connected to an external power supply through an electric wire; It further includes a rotating platform, and the 3D scanner is arranged on the rotating platform.
[0006] The characteristics of the present invention also lie in: The scanning resolution of the 3D scanner is not less than 0.01 mm.
[0007] The accuracy of the 3D printing device is 0.02 mm.
[0008] The weighing system uses an electronic balance with an accuracy of 0.0001 g.
[0009] The central control system is built-in with a calculation program, and performs data processing and calculation according to the density calculation formula.
[0010] The second technical solution adopted by the present invention is a method for measuring the visual density of coal samples, using the above visual density measurement device for coal samples based on 3D printing. The specific method is as follows: S1: Clean the surface of the coal sample to be measured; S2: Use a 3D scanner to perform a full - range scan on the cleaned coal sample to obtain the three - dimensional model data of the coal sample; S3: Transmit the three - dimensional model data to a 3D printing device, and the 3D printing device performs 3D printing according to the three - dimensional model data of the coal sample to obtain a model with the same shape as the coal sample; S4: Use a weighing system to weigh the printed model, and according to the density of the known material, obtain the volume of the coal sample; S5: Use a weighing system to weigh the original coal sample to obtain the weight of the coal sample; S6: Calculate the apparent density of the coal sample based on the weight and volume of the coal sample.
[0011] The features of the present invention also lie in: The specific method of S4 is: During the printing process, select a printing material with a known and uniform density, and then substitute the density of the printing material and the weight of the 3D printed model into the density formula to calculate the volume of the 3D printed model, which is the volume of the coal sample. The formula is as follows: V1 = m1 / ρ1 (1) In the formula, V1 is the volume of the 3D printed model, that is, the volume of the coal sample to be measured; m1 is the weight of the 3D printed model, and ρ1 is the density of the material of the 3D printed model.
[0012] The specific method of S6 is: Substitute the weight of the coal sample to be measured and the volume of the coal sample into the density formula. The formula is as follows: ρ2 = m2 / V1 (2) In the formula, ρ2 is the apparent density of the coal sample to be measured, V1 is the volume of the coal sample to be measured; m2 is the weight of the coal sample to be measured.
[0013] The beneficial effects of the present invention are: (1) The device for measuring the apparent density of coal samples based on 3D printing of the present invention utilizes 3D printing technology. By printing a model with the same shape as the coal sample, it ingeniously solves the problem of measuring the volume of coal samples. Compared with traditional methods, the measurement accuracy is higher, especially for coal samples with irregular shapes, which has a more obvious advantage. Moreover, the entire measurement process is relatively simple, the process is clear, and high - precision equipment is used in each link, reducing the error introduced by human factors and improving the reliability and repeatability of the measurement results; (2) The device and method for measuring the apparent density of coal samples based on 3D printing of the present invention have wide applicability and can be applied to the measurement of the apparent density of coal samples of different types and from different origins, providing strong technical support for the quality inspection and production applications in the coal industry. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1Schematic structural diagram of the coal sample apparent density measurement device based on 3D printing according to the present invention; Figure 2 Schematic flow diagram of the coal sample apparent density measurement method based on 3D printing according to the present invention. Specific embodiments
[0015] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0016] The coal sample apparent density measurement device based on 3D printing, as Figure 1 shown, includes a central control system. The central control system is respectively connected with a 3D scanner, a 3D printing device and a weighing system through data lines, and the central control system is also connected with an external power supply through an electric wire; It further includes a rotating platform, and the 3D scanner is arranged on the rotating platform. Among them, the scanning resolution of the 3D scanner is not less than 0.01 mm. During operation, a high-precision 3D scanner is used to perform a full-range scan on the cleaned coal sample to obtain the three-dimensional model data of the coal sample. The high-precision 3D scanner can quickly and accurately capture the external contour and surface feature information of the coal sample, and generate a three-dimensional digital model and transmit it to the central control system.
[0017] The central control system transmits the obtained three-dimensional model data to the 3D printing device. The accuracy of the 3D printing device is 0.02 mm, and the 3D printing device is used to print a model exactly the same as the external shape of the coal sample. During the printing process, a printing material with a known and uniform density is selected, such as a specific type of photosensitive resin material, and its density can be accurately obtained through the parameters provided by the material supplier.
[0018] The weighing system uses an electronic balance with an accuracy of 0.0001 g. It is respectively used to weigh the printed model and the original coal sample. The electronic balance has the characteristics of high precision, high stability and fast reading, and can accurately measure the weight of an object.
[0019] The central control system is connected to the 3D scanner and the 3D printing device, and is responsible for processing and optimizing the three-dimensional data of the coal sample obtained by the 3D scanner, and then transmitting it to the 3D printing device. At the same time, it can also store and manage the data; the central control system has a built-in calculation program, which performs data processing and calculation according to the weight data measured by the weighing system and the known density of the printing material according to the density calculation method, and finally obtains the apparent density of the coal sample and outputs and displays the result.
[0020] The coal sample apparent density measurement method uses the above-mentioned coal sample apparent density measurement device based on 3D printing, as Figure 2 shown, and the specific method is as follows: S1: Clean the surface of the coal sample to be measured: Select a representative coal sample, take it out from the coal samples, and use a soft brush to clean the surface of the coal sample to remove impurities such as dust and debris attached to the surface, ensuring that there are no impurities and dust on the surface of the coal sample to avoid affecting the measurement accuracy.
[0021] S2: Place the cleaned coal sample on the workbench of the 3D scanner, adjust the position of the coal sample to ensure that the coal sample can be scanned omnidirectionally, start the 3D scanner, and conduct an omnidirectional scan of the coal sample. During the scanning process, the 3D scanner will emit light and receive the reflected light, thereby obtaining the three-dimensional coordinate information of the surface of the coal sample and generating the three-dimensional model data of the coal sample.
[0022] S3: The central control system transmits the three-dimensional model data to the 3D printing device, and the 3D printing device conducts 3D printing according to the three-dimensional model data of the coal sample to obtain a model with the same shape as the coal sample. The specific method is as follows: Select a printing material with a known density determined in advance in the 3D printing device. For example, a certain type of photosensitive resin material, whose density is detected as ρ1 = 1.2 g / cm 3 . Import the received three-dimensional model data of the coal sample into the 3D printing device, perform printing settings according to the operation process of the device, such as printing accuracy, support structure setting, etc., and then start the 3D printing device to print a model with the same shape as the coal sample. After printing is completed, carefully take out the printed model and remove the support material that may remain on the surface of the model.
[0023] S4: Use a weighing system to weigh the printed model, and obtain the volume of the coal sample according to the density of the known material. The specific method of S4 is: During the printing process, select a printing material with a known and uniform density, and then substitute the density of the printing material and the weight of the 3D printed model into the density formula to calculate the volume of the 3D printed model, which is the volume of the coal sample. The formula is as follows: V1 = m1 / ρ1 (1) In the formula, V1 is the volume of the 3D printed model, that is, the volume of the coal sample to be measured; m1 is the weight of the 3D printed model, and ρ1 is the density of the material of the 3D printed model.
[0024] S5: Use a weighing system to weigh the original coal sample to obtain the weight m2 of the coal sample; S6: Substitute the weight of the coal sample to be measured and the volume of the coal sample into the density formula. The formula is as follows: ρ2 = m2 / V1 (2) In the formula, ρ2 is the apparent density of the coal sample to be measured, V1 is the volume of the coal sample to be measured; m2 is the weight of the coal sample to be measured.
[0025] Example 1 The apparent density measurement device for coal samples based on 3D printing, such as Figure 1As shown, it includes a central control system. The central control system is respectively connected with a 3D scanner, a 3D printing device and a weighing system through data lines, and the central control system is also connected with an external power supply through an electric wire; It further includes a rotating platform, and the 3D scanner is arranged on the rotating platform. Among them, the scanning resolution of the 3D scanner is not less than 0.01 mm. During operation, a high-precision 3D scanner is used to perform an all-round scan of the cleaned coal sample to obtain the three-dimensional model data of the coal sample. The high-precision 3D scanner can quickly and accurately capture the external contour and surface feature information of the coal sample, and generate a three-dimensional digital model and transmit it to the central control system.
[0026] Embodiment 2 Based on the coal sample apparent density measurement device using 3D printing, on the basis of the structure of Embodiment 1, the precision of the 3D printing device is 0.02 mm. The central control system transmits the obtained three-dimensional model data to the 3D printing device, and uses the 3D printing device to print a model that is exactly the same as the external shape of the coal sample. During the printing process, a printing material with a known and uniform density is selected, such as a specific type of photosensitive resin material, and its density can be accurately obtained through the parameters provided by the material supplier.
[0027] Embodiment 3 Based on the coal sample apparent density measurement device using 3D printing, on the basis of the structure of Embodiment 1, the weighing system uses an electronic balance with a precision of 0.0001 g. It is respectively used to weigh the printed model and the original coal sample. The electronic balance has the characteristics of high precision, high stability and fast reading, and can accurately measure the weight of an object.
[0028] Embodiment 4 The method for measuring the apparent density of a coal sample is as Figure 1 shown, and the specific method is as follows: S1: Clean the surface of the coal sample to be measured; S2: Use a 3D scanner to perform an all-round scan of the cleaned coal sample to obtain the three-dimensional model data of the coal sample; S3: Transmit the three-dimensional model data to the 3D printing device, and the 3D printing device performs 3D printing according to the three-dimensional model data of the coal sample to obtain a model with the same external shape as the coal sample; S4: Use the weighing system to weigh the printed model, and obtain the volume of the coal sample according to the density of the known material; S5: Use the weighing system to weigh the original coal sample to obtain the weight of the coal sample; S6: Calculate the apparent density of the coal sample according to the weight and volume of the coal sample.
[0029] Embodiment 5 The method for measuring the apparent density of the coal sample in this embodiment, based on Embodiment 4, the specific method of S4 is as follows: During the printing process, select a printing material with a known and uniform density, and then substitute the density of the printing material and the weight of the 3D printing model into the density formula to calculate the volume of the 3D printing model, which is the volume of the coal sample. The formula is as follows: V1 = m1 / ρ1 (1) In the formula, V1 is the volume of the 3D printing model, that is, the volume of the coal sample to be measured; m1 is the weight of the 3D printing model, and ρ1 is the density of the material of the 3D printing model.
[0030] Embodiment 6 The method for measuring the apparent density of the coal sample in this embodiment, based on Embodiment 5, the specific method of S6 is as follows: Substitute the weight of the coal sample to be measured and the volume of the coal sample into the density formula. The formula is as follows: ρ2 = m2 / V1 (2) In the formula, ρ2 is the apparent density of the coal sample to be measured, V1 is the volume of the coal sample to be measured; m2 is the weight of the coal sample to be measured.
Claims
1. A coal sample apparent density measuring device based on 3D printing, characterized in that: It includes a central control system, which is respectively connected to a 3D scanner, a 3D printing device and a weighing system through data cables, and is also connected to an external power supply through wires; It also includes a rotating platform, and the 3D scanner is arranged on the rotating platform.
2. The device for measuring apparent density of coal samples based on 3D printing according to claim 1, characterized in that: The scanning resolution of the 3D scanner is not less than 0.01 mm.
3. The device for measuring apparent density of coal samples based on 3D printing according to claim 1, characterized in that: The accuracy of the 3D printing equipment is 0.02mm.
4. The device for measuring apparent density of coal samples based on 3D printing according to claim 1, characterized in that: The weighing system uses an electronic balance with an accuracy of 0.0001g.
5. The device for measuring apparent density of coal samples based on 3D printing according to claim 1, characterized in that: The central control system has a built-in calculation program that performs data processing and calculation according to the density calculation formula.
6. A method for measuring apparent density of a coal sample, characterized in that: Using the coal sample apparent density measuring device based on 3D printing according to any one of claims 1 to 5, the specific method is as follows: S1: Clean the surface of the coal sample to be tested; S2: Use a 3D scanner to perform an all-round scan on the cleaned coal sample to obtain three-dimensional model data of the coal sample; S3: The three-dimensional model data is transmitted to a 3D printing device, and the 3D printing device performs 3D printing according to the three-dimensional model data of the coal sample to obtain a model with the same appearance as the coal sample; S4: Weigh the printed model using a weighing system, and obtain the volume of the coal sample based on the known density of the material; S5: weighing the original coal sample using a weighing system to obtain the weight of the coal sample; S6: Calculate the apparent density of the coal sample based on the weight and volume of the coal sample.
7. The method for measuring apparent density of coal samples according to claim 6, characterized in that: The specific method of S4 is: during the printing process, a printing material with known and uniform density is selected, and then the density of the printing material and the weight of the 3D printed model are input according to the density formula to calculate the volume of the 3D printed model, that is, the volume of the coal sample. The formula is as follows: V1=m1 / ρ1(1) Wherein, V1 is the volume of the 3D printed model, that is, the volume of the coal sample to be tested; m1 is the weight of the 3D printed model, and ρ1 is the density of the material of the 3D printed model.
8. The method for measuring apparent density of coal samples according to claim 7, characterized in that: The specific method of S4 is: The specific method of S6 is: According to the density formula, the weight and volume of the coal sample to be tested are entered, and the formula is as follows: ρ2 = m2 / V1 (2) In the formula, ρ2 is the apparent density of the coal sample to be tested, V1 is the volume of the coal sample to be tested; m2 is the weight of the coal sample to be tested.