45results about How to "High execution precision" patented technology

A parallel mechanism with multiple slide rails and composite branch chains. It includes a base, a moving platform, a first compound drive branch, a second compound drive branch and a third compound branch, and the mechanism has three degrees of freedom of rotation and two translations. The advantages of the present invention: the use of two composite drive branch chains and one composite branch chain can effectively reduce the number of branch chains of the mechanism, reduce the interference between the branch chains during the operation of the mechanism, and at the same time, the cooperation of multiple branch chains can improve the flexibility of the mechanism ;Using multiple slide rails to connect and drive, which can maintain the stability of the operation of the mechanism and improve the execution accuracy of the end effector on the moving platform; The connection method of two identical branch chains and three identical slide rails is convenient for processing, manufacturing and replacement, reducing the cost of The cost is beneficial to save resources; the redundant structure can avoid singularity when the moving platform rotates, and ensure the accuracy of the mechanism operation.

The present invention discloses a measuring apparatus and method of spot centroid extraction accuracy. The apparatus uses a displacement high-frequency modulation method. A fast steering mirror, a collimating device, and the like actuated by a laser device and a piezoelectric ceramics actuator generate remote high-frequency small-amplitude light source displacement in a simulation manner, an amplitude and a frequency of the light source displacement are set in advance, a spot centroid extraction system detects the light source displacement, a working computer processes data obtained through detection, and to-be-measured spot centroid extraction accuracy may be obtained. According to the measuring apparatus and method of spot centroid extraction accuracy, interference of measuring platform jitter on spot centroid extraction accuracy measurement can be effectively restrained, and the measuring apparatus and method is simple and convenient.

The invention relates to a digital constant-temperature control circuit applied to a moving base gravimeter. The digital constant-temperature control circuit is composed of a temperature measurement circuit, a digital signal processing circuit, a driving circuit and a power supply circuit. The temperature measurement circuit consists of a precision reference voltage source, a temperature measuring bridge, a multi-channel change-over switch, an instrument amplifier, and a low-pass filter. The digital signal processing circuit includes an A / D sampling chip, a DSP chip, and an FPGA chip. The driving circuit includes an optocoupler, a protection diode, an MOS tube, a heating resistor and a fan. The power supply circuit consists of a + / - 15-V module, a 5-V module, a 12-V module and a 3.3-V module. A temperature measurement bridge is formed by using a high-precision resistor and a platinum resistor and selection of the resistance of the high-precision resistor uses the resistance of the platinum resistor under the target temperature value as a reference, so that measurement noises of the temperature measurement bridge are minimized when the controlled temperature is close to the target temperature value and thus high-resolution temperature measurement is realized.

A vehicle device connected to an external device (10) having a display unit (11) and acquiring pixel information of each pixel of the display unit includes: a vehicle display unit (106) for displaying a screen image according to the pixel information, the screen an image is displayed on the display unit; a control content storage device (112) for storing control content associated with pixel-related screen image information determined by the pixel information; the pixel-related screen image information determined a device (121) for determining pixel-related screen image information based on the pixel information; and a control device (123) for determining pixel-related screen image information based on the pixel-related screen image information determined by the pixel-related screen image information determining device and in The content stored in the content storage device is controlled to determine the control content, and is used to execute the determined control.

The invention discloses an optimization method of a minimum acceleration trajectory of a 7-DOF humanoid-arm-provided flying object in operation. The optimization method comprises the following steps:step (S1) building a mathematic model, adopting Joint trajectories of a quartic polynomial interpolation operation process and a return process, and taking a joint angular acceleration norm minimum asa target function for algorithm optimization; step (S2) setting the running parameters of a particle swarm optimization algorithm; step (S3) running the particle swarm optimization algorithm, and obtaining a group of optimal redundant variable parameters by optimizing and minimizing the target function; and step (S4) substituting the optimal redundant variable parameter into operation action trajectory parameterization of the humanoid-arm-provided flying object to obtain the action trajectory of which the joint angular acceleration norm is minimum. The optimization method disclosed by the invention can be used for obtaining an operation action trajectory of the humanoid-arm-provided flying object, wherein the angular acceleration is continuous, and the joint angular acceleration norm is also minimum, so hidden vibration caused by an incontinuous angular acceleration trajectory in an action process of a humanoid arm, disturbance on the posture of a robot body is reduced, and the execution precision of the humanoid arm is improved.

The invention discloses a device and a method of measuring beacon light spot displacement sensitivity by a tracking and pointing system. The device adopts a wavelet transform-based data processing method, a long-distance light source displacement with a fixed frequency and regularly-changed amplitude is generated through simulation by a laser, a piezoelectric actuator, a piezoelectric ceramic quick mirror, a collimator and the like, the amplitude and the frequency of the light source displacement are set in advance, a to-be-detected system detects the light source, a working computer carries out wavelet transform and other data processing on the detected information, and thus, the beacon light spot displacement sensitivity by the to-be-detected system can be obtained. Interference on the measurement device by jitter of the measurement platform can be effectively suppressed, and the device and the method of the invention are simple, convenient and easy.

An error-controllable four-axis industrial robot B-spline transition smooth trajectory generation method, comprising: Step 1, four-axis industrial robot trajectory preprocessing: the trajectory is divided into smooth trajectory segments and non-smooth trajectory segments, and The four-axis attitude is preprocessed to ensure that the inferior arc trajectory is taken between the two trajectory points; step 2, the four-axis trajectory B-spline smoothness: traverse the trajectory segments generated in step 1 to be smooth, and follow the trajectory point error threshold for each trajectory segment , position point chord height error threshold and continuity require geometric iteration method to generate B-spline transitional smooth trajectory. The B-spline transitional smooth trajectory of the present invention is composed of a linear trajectory and a B-spline trajectory, and the entire trajectory has G1 or G2 continuity with synchronous position and attitude, which meets the error of the trajectory point and the position chord height error between the trajectory points, and Using the spline trajectory can realize the smooth trajectory of the complex application of the four-axis industrial robot, thereby improving the operating efficiency and quality of the four-axis industrial robot.