30results about How to "Avoid collection effects" patented technology

A high-speed melon and fruit quality recognition system based on machine vision, including an image acquisition system, an optical imaging system and an optical fiber sensor. The optical imaging system includes a light box with diffused frosted glass embedded in the inner wall, a color CCD camera and a point light source uniformly distributed inside the light box. On the left and right, the two image acquisition cards in the image acquisition system are respectively connected to the two cameras through video cables. The external trigger function of the image acquisition card is used to control the image capture by using the periodic level signal generated by the optical fiber sensor. The industrial computer The image processing unit performs subsequent processing on the image. The invention adopts external signal trigger control image acquisition, double CCD three-dimensional stereo vision and color image processing technology, and realizes high-speed, high-resolution and non-damaging discrimination of the external quality of melons and fruits.

The invention belongs to the technical field of ecological engineering. A fog water collector suitable for collecting fog water samples in the field environment was designed. The mist collecting device is mainly composed of a rainwater retaining cover, two layers of mist absorbing nets, a mist collecting dish, a connecting handle and a supporting foot. It has high fog water collection efficiency, and can effectively remove the influence of vertical precipitation and water evaporation on fog water collection in the field environment, and provides a simple and efficient experimental device for carrying out research activities on fog water in the future.

The invention brings forward a pulse signal synchronization integration measurement apparatus and method resisting random noise, for realizing pulse signal intensity measurement which has a synchronization feature and may has a high pulse pile-up probability. The content mainly comprises a fixed charge reverse charging integration circuit and a synchronization gated data acquisition circuit, and a measurement method for reducing and deducting random noise pulses. The fixed charge reverse charging integration circuit comprises an integration circuit and a fixed charge reverse charging circuit, wherein the integration circuit is used for charging a capacitor and converting intensity information of detected pulse signals into voltage amplitude information; and the fixed charge reserve charging circuit triggered by level is used for limiting output voltages of the integration circuit within a linear scope, and reverse charging pulses can be delayed so as to avoid influences on data acquisition. In terms of the measurement method, the intensity of random noise signals is measured by use of a time-sharing measurement method, the random noise pulses are further deducted in a data processing process.

The invention relates to a gas drilling shaft bottom near-bit continuous impact focus nipple, comprising a nipple body, a cylinder body, a piston (3) and a gas distribution device, wherein the cylinder body is arranged in a shell (1), the piston (3) is arranged in the cylinder body, a lower gas inlet passage (8) is formed between the cylinder body and the shell (1), a lower gas chamber (2) is formed between the lower end of the piston (3) and the inner wall of the shell (1), the lower gas inlet passage (8) is communicated with the lower gas chamber (2), an upper gas inlet passage (9) is formed at the bottom (7) of the cylinder body, an upper gas chamber (6) is formed between the upper end of the piston (3) and the cylinder body, the upper gas inlet passage (9) is communicated with the upper gas chamber (6), and the gas distribution device is arranged at the upper part of the cylinder body. According to the focus nipple, a focus in seismic exploration is applied to a shaft bottom near a bit, a focus linear (Chirp) scanning technology can be combined with a Mini-SOSIE technology, and the focus excites the ground to generate linear scanning pulse signals through a pulse coding technology, so that the excitation quality of seismic wave is improved.

The embodiment of the present application discloses a voiceprint detection device and method, including a first sound pickup sensor unit, a second sound pickup sensor, and a main control analysis unit; the first sound pickup sensor unit collects the tester's data by contacting the tester. The first voiceprint signal; the second pickup sensor unit collects the second voiceprint signal conducted through the air; the main control analysis unit is used to compare the first voiceprint signal with the second voiceprint signal when the tester speaks , to determine whether it is the voiceprint of the same person. The present application avoids the influence of open indoor environment and noise environment on voiceprint collection by the method of solid conduction.

The invention discloses a testing device of tool spindle dynamics of a numerically-controlled machine tool in a cutting state and belongs to the mechanical vibration and testing field. The testing device of the tool spindle dynamics of the numerically-controlled machine tool in the cutting state comprises the numerically-controlled machine tool, a signal collecting system and an analyzing system. According to the testing device of the tool spindle dynamics of the numerically-controlled machine tool in the cutting state, actual vibration of a machine tool spindle cutting tool is measured through an electrical vortex sensor, an axel center track of the machine tool spindle is drew, cutting stimulus signals the cutting tool actually bear are measured through a cutting force tester, and the test and the analysis of dynamic characteristics of the cutting tool in the actual cutting state are achieved in combination with the measured actual vibration of the cutting tool. The testing device of the tool spindle dynamics of the numerically-controlled machine tool in the cutting state has the advantages of solving the problem that the stability of the machine tool system in the actual cutting state cannot be measured and achieving real-time measure of the numerically-controlled machine tool in the actual cutting state.

The invention relates to a multi-gap gear rotor system test platform which comprises a driven gear, a driving gear, a work table base, driven gear frame support blocks, a driven gear frame, a three-axis acceleration sensor and a drive device. The work table base is L-shaped. A mounting post used for mounting a driven gear frame support block is arranged on the horizontal surface of the L shape. Agroove is arranged on the upper end of each mounting post. A driving gear shaft is fixed by upper and lower bearing plates on the vertical surface of the L shape. The driving gear is arranged on the upper part of the driving gear shaft. The lower part of each driven gear frame support block matches the groove of a mounting post in shape, and is fixed in the groove. The upper part is a cylinder used for mounting the driven gear. A number of driven gear frame support blocks are arranged, and the radius of the cylindrical parts of a number of driven gear frame support blocks is different. Due tothe driven gear frame support blocks with multiple specifications and precision, the platform has the advantages of more convenient operation, being more precise and lower processing cost.