Embodiments of the present disclosure provide a method and device for detecting a speed of an obstacle, a computer device, and a storage medium. The method includes: calculating at least two real-time speeds corresponding to the obstacle by using a multi-frame difference algorithm according to multi-frame data acquired by a sensor in a preset time window; calculating at least two speed statistic values corresponding to the obstacle according to the at least two real-time speeds; mapping each of the at least two speed statistic values to a corresponding static probability according to a mapping relationship between speed statistic values and static probabilities, to obtain at least two static probabilities; and fusing the at least two static probabilities to obtain a fused static probability of the obstacle, and determining the speed of the obstacle according to the fused static probability.

An error detection system for notifying maintenance personnel of errors in a bowling lane operation may include a camera, artificial light source (optional), a computer that sends an output signal. The output signal may be a signal to provide notification to maintenance personnel to fix the error or an electrical signal to the pinsetter or ball return unit to manipulate operation of the same to prevent further damage. In this manner, interruptions and delays to bowlers will be minimized because maintenance personnel is immediately notified of any errors and can resolve the errors before the bowler realizes the error.

An error detection system for notifying maintenance personnel of errors in a bowling lane operation may include a camera, artificial light source (optional), a computer that sends an output signal. The output signal may be a signal to provide notification to maintenance personnel to fix the error or an electrical signal to the pinsetter or ball return unit to manipulate operation of the same to prevent further damage. In this manner, interruptions and delays to bowlers will be minimized because maintenance personnel is immediately notified of any errors and can resolve the errors before the bowler realizes the error.

The present invention provides a speed detection device and a speed detection method for a handrail of a passenger conveyor, and belongs to the technical field of passenger conveyors. A distance from the speed detection device provided by the present invention to a surface of a detected handrail is centimeter-scale or below centimeter-scale, wherein the speed detection device comprises a light source part, an imaging sensor and an image processing part. The speed detection device and the speed detection method provided by the present invention can accurately detect to obtain speed information of the running handrail, and the speed detection device is easy to install and maintain.

The present invention provides a speed detection device and a speed detection method for a handrail of a passenger conveyor, and belongs to the technical field of passenger conveyors. A distance from the speed detection device provided by the present invention to a surface of a detected handrail is centimeter-scale or below centimeter-scale, wherein the speed detection device comprises a light source part, an imaging sensor and an image processing part. The speed detection device and the speed detection method provided by the present invention can accurately detect to obtain speed information of the running handrail, and the speed detection device is easy to install and maintain.

A recorder for documenting that a shaft in a rotating machine has been rotated while the rotating machine is stored or otherwise out of service. The recorder includes an elongated strip that is wound on a reel disposed adjacent the shaft. The reel is rotatable about an axle that is spaced away from the shaft. A free end of the strip is secured to an outer surface of the shaft and spools onto the shaft as the shaft is rotated, and which unwinds the strip from the reel. Markings are on the strip representing distance from the free end, which visually indicate occurrence and amount of shaft rotation. Types of markings include different colors or patterns, and which change at distances corresponding to shaft circumference. Alternatively, the markings are metered increments illustrating linear distance.

Playing surface properties can be assessed electronically. A ball can be launched onto the playing surface, and movement of the ball recorded. Ball movement information can be derived from a recording of ball movement. A ball's position in pixels in each frame of recording can be translated to a real-world position of the ball to determine the ball's path or trajectory. Further ball movement information, such as bounce height and spin, can be determined based on the trajectory and other information. Properties of the playing surface, including a coefficient of friction, coefficient of restitution, and deviation angle, can be determined based on the ball movement information. The properties can then be output and utilized to determine whether the playing surface meets expectations or if maintenance is required, among other things.

Playing surface properties can be assessed electronically. A ball can be launched onto the playing surface, and movement of the ball recorded. Ball movement information can be derived from a recording of ball movement. A ball's position in pixels in each frame of recording can be translated to a real-world position of the ball to determine the ball's path or trajectory. Further ball movement information, such as bounce height and spin, can be determined based on the trajectory and other information. Properties of the playing surface, including a coefficient of friction, coefficient of restitution, and deviation angle, can be determined based on the ball movement information. The properties can then be output and utilized to determine whether the playing surface meets expectations or if maintenance is required, among other things.

Present embodiments pertain to systems, apparatuses, and methods for analyzing and reporting rotational or reciprocating movements and speed of rotation or reciprocation in mechanical structures, machines, and machine components, through the use of an acquired video recording representing a plurality of cycles of motion, by measuring intensity values of a subset of pixels contained in a region of interest within the video recording in a plurality of frames of the video recording, thereby calculating a speed of rotation or reciprocation of the structure, machine or machine component.

Present embodiments pertain to systems, apparatuses, and methods for analyzing and reporting rotational or reciprocating movements and speed of rotation or reciprocation in mechanical structures, machines, and machine components, through the use of an acquired video recording representing a plurality of cycles of motion, by measuring intensity values of a subset of pixels contained in a region of interest within the video recording in a plurality of frames of the video recording, thereby calculating a speed of rotation or reciprocation of the structure, machine or machine component.