The invention discloses an arm support vibration displacement measurement method, a system thereof and a concrete pump truck with the same. The arm support vibration displacement measurement method comprises the steps of arranging marks on an arm support, acquiring images of marks in different time, and calculating arm support vibration displacement according to change of the positions of the images marked in the different time. Therefore, simple, quick, non-contact, real-time and high-accuracy vibration displacement measurement can be achieved.

Arm support vibration displacement measurement method, system thereof and concrete pump truck with same

The invention discloses a tire mechanical property intelligent detection device and a detection method thereof. The detection device comprises a tire, a rim, a gravity sensor, a camera and a marking point; the gravity sensor and the camera are arranged at the same circumferential position of the rim; the marking point is positioned on the surface of the inner side of the tire; the camera is arranged over against an area of the marking point. The detection method adopts a neural network algorithm; when the working tire is deformed, the camera is utilized to acquire displacement variation of a phosphor dot and a tire force is obtained by the neural network algorithm; a six-component sensor is not required for measuring a tangential force, an axial force, a vertical force, a running torque, a rolling moment and a yawing moment on a rotary drum test bench to realize solution of a longitudinal force, a lateral force, a vertical load, a running torque, a rolling moment and an aligning torque of the tire; the tire mechanical property intelligent detection device has the advantages of being simple and compact in structure, simple and convenient to operate, low in cost and the like.

Tire mechanical property intelligent detection device and detection method thereof

Method for measuring rotating speed by using smart phone

The invention discloses a method for using a camera module to measure the rotating speed of a rotating object. The method includes the steps of: obtaining an image of the rotating object; judging whether the image meets a definition requirement; when the image does not meet the definition requirement, improving the frame rate of the camera module and returning to obtain an image of the rotating object again; when the image meets the definition requirement, obtaining the current frame rate of the camera module; and calculating the rotating speed of the rotating object according to a frame rate-rotating speed curve of the camera module and the current frame rate. Correspondingly, the invention also discloses a device for using the camera module to measure the rotating speed of the rotating object, a camera module and equipment. Through the technical scheme of the invention, measurement of the rotating speed of the rotating object is realized easily and conveniently.

Method and device for measuring rotating speed of rotating object, camera module and equipment

The invention discloses an undercarriage fault detection method based on a non-contact visual sense In detection, when a system receives an external trigger signal, a camera starts collecting images and sends the images to a calculator memory and then undercarriage images are analyzed and processed by software In angle detection in the undercarriage folding and unfolding process, an external light source is used for irradiating a diffuse reflection plate and a diffuse reflection strip on an undercarriage, and thus an undercarriage image of strong contrast is obtained Meanwhile, comparison with a standard angle is conducted to determine that whether the undercarriage is disposed in place or not The camera collects a guard board image and carries out necessary pretreatment of the guard board image to highlight boundary information A guard board curve is detected to determine whether concave or convex conditions exist or not Comparison with a set value is conducted to give a determination result of whether deformation being qualified or not The invention can not only adopt modes of image collection and real-time comparative analysis to clearly and visually achieves fault detection in the undercarriage folding and unfolding process, but also freely select an installation layout Besides, the preparation period before detection is shortened and the manpower cost is saved

Wan Jianping

Papers

Image measuring method for compression quantity of tyre and axle displacement in drop test

Rotational speed image measurement technology of landing gear drop test aircraft wheel