A fixed gantry vehicle-mounted material volume measurement method

Abstract

The invention relates to a fixed gantry on-board material volume measurement system and a fixed gantry on-board material volume measurement method. The fixed gantry on-board material volume measuring system comprises a length calibrating device which is used for calibrating the overall length L of a freight vehicle, a region scanning device of which the scanning plane is vertical to the vehicle body and which is disposed above the freight vehicle and is used for scanning the whole vehicle from the head to the tail of the freight vehicle, and a principal computer which is connected with the length calibrating device and the region scanning device and is suitable for acquiring the average width W and average height h of the vehicle body according to a scanning signal of the region scanning device and working out the overall volume V of the material based on the average width W and the average height h as well as the overall length L and the empty vehicle volume V0. Compared with a visual measurement method, the fixed gantry on-board material volume measurement system and the working method of the invention have the beneficial effect that measurement is not affected by external factors, and is of stability, high accuracy and low cost. Compared with an artificial measurement method, the system and the method have the beneficial effect that measurement is automatic, not affected by man-made factors and of high accuracy.

Description

technical field [0001] The invention relates to a volume measurement system and method, in particular to a fixed gantry type vehicle-mounted material volume measurement system and method. Background technique [0002] For the wood-based panel industry, it is necessary to purchase a large amount of shavings, wood chips and other debris as processing raw materials for the production of wood-based panels. The purchase of raw materials is mostly transported by large trucks, and the actual weight of the raw materials is used as the basis for settlement based on the weight measured by the weighbridge minus the empty weight of the truck during the transaction. The problem with this transaction method is that the raw materials are often artificially doped with various sundries, such as metals, stones, etc., thereby increasing the load capacity and causing greater losses to the buyer. Therefore, in order to prevent the seller from adulterating and cheating on the raw materials, when...

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Problems solved by technology

The problem with this transaction method is that the raw materials are often artificially doped with various sundries, such as metals, stones, etc., thereby increasing the load capacity and causing greater losses to the buyer.

[0003] For the volume measurement of vehicle-mounted materials in the above-mentioned application occasions, the general volume estimation measurement method cannot be used due to large errors. At present, more accurate measurement methods include: 1. Image-based volume measurement method, which uses stereo vision imaging. The obtained image is processed to obtain the distance information of the feature points on the surface of the material, and three-dimensional reconstruction is performed to calculate the volume of the material. This method has high measurement accuracy, but the disadvantage is that the cost is high. In addition, the weather changes lead to changes in light intensity. Man-made shadows will affect the acquisition and processing of images, resulting in larger errors in measurement results and unstable measurement systems; Second, the manual measurement method based on ranging sensors, which uses ranging sensors and uses manual measurement methods to measure Multiple feature points are measured in three-dimensional coordinates, and the volume value is calculated through three-dimensional modeling. This method has a low cost, but the measurement cycle is long, and the measurement accuracy has a lot to do with human operation factors; 3. Ultrasonic cross-sectional scanning method, this method Similar to the principle of using ultrasound to measure the volume of human organs in medicine, the measurement accuracy is high, but the cost is high, and the unevenness of the material and the difference in the medium will affect the reflection effect of the ultrasound, thereby affecting the measurement accuracy.

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