The invention discloses a visual scanning and distance measuring method for coal quantity passing belt conveyer, which belongs to the technical field of online automatic detection of coal mine equipment. The method features the following steps: obtaining the outline drawing of a reference object through a line light source and a CCD camera; transmitting the data acquired by the camera to a position machine; determining the cross-sectional area of the materials passing the detection surface after image analysis; and conducting scanning and distance measuring to the coal quantity passing the belt obtained by time integral within a testing time. The method provided by the invention distinguishes itself from other measuring methods in China's coal industry by low cost and a simple structure. The adoption of line light source to project a contour of a testing position on a passing belt means that even under complex working conditions with dim light and enormous dust, the method can work free from interference to achieve high measuring accuracy and determine the flow of coals passing the belt more accurately.

Visual scanning and distance measuring method for coal quantity passing belt conveyer

The invention provides a coal flow video detection method under a complex background. Through the method, the granularity and the amount of coal on a conveying belt can be detected in real time through acquired video images. First, a granularity detection area and a coal amount detection area are set in the images to be used for detecting the granularity and the amount of the coal respectively; then, the edge strength of the image of the granularity detection area in the horizontal direction is detected, and thus the coal is divided into lump coal or powdered coal according to the granularity of the coal; finally, a three frame difference method is applied to the image of the coal amount detection area to obtain the coal area on the conveying belt, then, the smallest convex polygon enclosing the coal area is calculated, and the amount of coal on the conveying belt is obtained according to the ratio of the area of the convex polygon to the area of the coal amount detection area. According to the method, influences of environmental factors such as dust and light are little, and various ground and underground environments of a coal mine can be detected accurately in real time in the conveying process of production.

Coal flow video detection method under complex background

The invention discloses an online analysis method and system of slag pieces. The method comprises the following steps: continuously photographing slag pieces on a moving slag discharging belt to obtain slag piece images; acquiring a transmission speed of the slag discharging belt and slag piece quality in real time; scanning the slag pieces on the moving slag discharging belt by pre-set frequency in real time, so as to obtain outline data of the slag pieces; analyzing the obtained slag piece images to obtain lumpiness distribution data of the obtained slag pieces and carrying out combined analysis on the transmission speed and the slag piece quality to obtain mass flow data of the slag pieces; carrying out combined analysis on the transmission speed and the outline data of the slag pieces to obtain volume flow data of the slag pieces. According to the online analysis method and system, the images of the slag pieces on the slag discharging belt, the mass flow data and the volume flow data are acquired in real time, so that continuous sampling of the slag pieces can be realized and online real-time analysis on properties of the slag pieces can be carried out; powerful guarantees are provided for optimized construction of a TBM (Tunnel Boring Machine).

Online analysis method and system of slag pieces

An excavated earth volume measuring and early-warning system of a shield machine comprises a weight sensor, a speed sensor, an infrared area scanning sensor, a controller, a touch screen and a belt. The weight sensor is mounted under a fixed bearing surface of the belt, a support for mounting the infrared area scanning sensor is mounted on the belt, and the infrared area scanning sensor is positioned above the belt; and the weight sensor, the speed sensor, the infrared area scanning sensor and the touch screen are connected with the controller via cables, and the controller and the touch screen are installed in a control chamber. Thus, the weight, volume and density of excavated earth can be calculated accurately in a construction site to improve excavation efficiency and safety of equipment, the system is simple in structure, easy to maintain, low in cost and capable of early warning, the working efficiency and safety of the shield machine are improved greatly, and the system is applied to the technical field of shield machine engineering.

Excavated earth volume measuring and early-warning system of shield machine

The invention provides a calibration device and method of a double-loader electronic belt scale. The device comprises a belt, a first loader, a second loader, a speed measuring sensor and a weighing instrument. The first loader comprises a first weighing sensor. The second loader comprises a second weighing sensor. The weighing instrument is electrically connected with the first weighing sensor and the second weighing sensor respectively. A first interface and a second interface of the weighing instrument are respectively used for collecting gravity signals of transmitted materials measured by the first weighing sensor and the second weighing sensor in time intervals such as a preset first time interval, a calibration period and a preset second time interval; a third interface is used for receiving transmission speed signals sent by the speed measuring sensor; and a signal processing unit is used for calculating a second calibration coefficient of the first loader, for calculating a second calibration coefficient so as to finish calibrating the second loader, and for calculating a third calibration coefficient of the first loader so as to finish calibrating the first loader.

Calibration device and method of double-loader electronic belt scale

The invention provides a flow measurement method and a flow measurement device The method comprises the following steps: measuring a plurality of instantaneous distances between a measurement module and the upper surface of a material on a scraper conveyor by the measurement module; acquiring a plurality of instantaneous stack heights of the material according to the instantaneous distances and the distance between the measurement module and the surface of the scraper conveyor; on the section width of the scraper conveyor, carrying out numerical integration on the instantaneous stack heights of the material so as to calculate an instantaneous stack sectional area of the material; and carrying out numerical integration on the product of the instantaneous stack sectional area of the material and the transmission speed of the scraper conveyor in time so as to calculate the volume flow of the material within the time of integration The flow measurement method and the flow measurement device of the invention provide a new measurement method for assessing the output of raw coal on the top coal caving mining face in a coal mine, realize the accurate measurement of the output of the raw coal; can improve the enthusiasm of the on-job workers for producing coals, and improve the recovery rate of the coal field and the economic benefit of the coal mine

Flow measurement method and device

The invention provides a touch button device for explosion-proof electric equipment. The touch button device comprises an explosion-proof shell, a touch sensor and a control circuit board, wherein a containing cavity is formed inside the explosion-proof shell; the touch sensor comprises a grounded metal plate, a metal sensing key and an insulating medium layer, the metal sensing key is arranged on the grounded metal plate, the insulating medium layer is arranged between the grounded metal plate and the metal sensing key, and the grounded metal plate is arranged on the inner surface of the explosion-proof shell; the control circuit board is connected with the touch sensor and arranged inside the explosion-proof shell, and an output interface of the control circuit board is electrically connected with a control system of the explosion-proof electric equipment. The touch sensor is used for detecting that an inductor gets close so that an operator can control the electric equipment inside the explosion-proof shell outside the explosion-proof shell. The touch button device is simple in structure and reliable in performance, and no hole needs to be formed in the explosion-proof shell. The touch button device for the explosion-proof electric equipment is simple in structure and high in safety performance.

Touch button device for explosion-proof electric equipment

The invention provides a truck scale weighing method and a truck scale weighing system on the basis of vehicle accurate positioning on a vehicle license plate. The method comprises the following steps: acquiring a front vehicle license plate image of a first camera and acquiring a rear vehicle license plate image of a second camera at the same moment; respectively using the front vehicle license plate image and the rear vehicle license plate image as vehicle license plate images to be processed and according to an image and road coordinate system conversion relation and known actual width and height of the standard vehicle license plate, determining road coordinates of an intersection point of the plumb line of the center point of the upper edge of the vehicle license plate in each vehicle license plate image to be processed and the road plane so as to determine road coordinates of the center point of the upper edge on the road plane; according to front and rear road coordinates of the center points of the upper edges of the vehicle license plates in the front and rear vehicle license plate images on the road plane, determining the position of a vehicle and carrying out truck scale weighing control on the vehicle on the basis of the position of the vehicle. On the basis of positioning the vehicle license plate images, accurate positioning of the vehicle in a weighing region can be implemented and accurate control of weighing the vehicle and accuracy and reliability of a weighing result are ensured.

Truck scale weighing method and system on basis of vehicle accurate positioning on vehicle license plate

The invention provides a belt weigher image calibration method and a metering monitoring system. The metering monitoring system comprises a belt weigher and an image calibration device, the belt weigher comprises a carrier, a speed sensor and an electronic weighing instrument, the image calibration device comprises two camera shooting instruments and an image processing instrument, the output end of the carrier is connected with the first input end of the electronic weighing instrument, the output end of the speed sensor is connected with the second input end of the electronic weighing instrument, the electronic weighing instrument and the image processing instrument are connected through a communication port, and the output ends of the two camera shooting instruments are connected with the first input end and the second input end of the image processing instrument respectively. The image processing instrument determines the size of materials on a belt according to belt work condition images collected by the two camera shooting instruments, the stacking density of the materials on the belt is determined according to the weight, collected by the electronic weighing instrument, of the materials on the belt, and therefore according to the relation between the determined material stacking density and the marked stacking density, real-time calibration is carried out on the belt weigher, and reliability of metering data of the belt weigher is improved.

Belt weigher image calibration method and metering monitoring system

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