49results about How to "Will not affect detection" patented technology

The invention discloses a real-time step detection method based on a binocular camera. Obtain the depth information of the image through the parallax of the two images collected by the binocular camera, and combine the nine-axis gyroscope (gravity acceleration, gyroscope, magnetometer) to reconstruct the depth information in the camera coordinate system into a three-dimensional point in the world coordinate system Cloud, segment the point cloud composed of roads and other point clouds by the plane fitting method, and then perform plane fitting on the point cloud composed of roads to judge whether the road is flat or composed of steps. The present invention can detect the upper and lower steps and the distance from the user in real time, and can help visually impaired people (blind people, people with low vision) go up and down the steps to ensure their personal safety; the present invention adopts passive detection, low power consumption, no It will interfere with others, and fully considers the interference factors that may be encountered in various practical environments, and has the advantages of fast speed, high precision, and high cost performance.

The invention discloses an auxiliary stent for detection in a stomatology department. The auxiliary stent for detection in the stomatology department comprises a base, a support frame and a distraction part, wherein the distraction part comprises a scissors-shaped distraction rack, an upper distraction tooth socket and a lower distraction tooth socket; the upper distraction tooth socket and the lower distraction tooth socket are fixed on the inner side end of the scissors-shaped distraction rack; the structure of the upper distraction tooth socket is the same as the structure of the lower distraction tooth socket; a wedge-shaped block is arranged at the outer side end of the scissors-shaped distraction rack; a guiding chute is formed in a rack arm at the outer side end of the scissors-shaped distraction rack; guiding sliders which are matched with the guiding chute are separately arranged on the top surface and the bottom surface of the wedge-shaped block; a spring is fixed between anend of the wedge-shaped block and a rotating shaft of the scissors-shaped distraction rack; a positioning clamping tooth is arranged on the surface of the wedge-shaped block; and a convex tooth whichis matched with a positioning slot is arranged on the inner side surface of the scissors-shaped distraction rack. The auxiliary stent for detection in the stomatology department is reasonable in structural arrangement and convenient to operate; the mouth of a patient can be expanded, moreover, normal detection on the throat of the patient is not affected, meanwhile, an expanded part is in a stablestate by the wedge-shaped block under the effect of the spring, and the auxiliary stent for detection in the stomatology department is good in use stability, high in applicability and good in practicability.

The invention discloses a hirudin anticoagulation tube sealing device for a venous retention needle, which comprises a sleeve, a transparent tee joint connected with the rear end of the sleeve, and a transfusion connector connected with a transfusion tube or a blood collecting tube; a connecting part connected with a tube sealing injector is arranged on the middle section of an extension tube; the tube sealing injector comprises a liquid tube in which a tube cavity is formed, a needle part connected with the front end of a sealed tube, and a shell which is sleeved outside the liquid tube and of which the rear end is sealed; a raised clamping wire is formed on the outer surrounding wall of the rear end of the liquid tube; a clamping groove is formed on the inner surrounding wall of the front end of the shell, and clamping steps at equal distance intervals are formed on the inner surrounding wall of the shell; and a sealing plug connected with the rear wall of the shell is arranged in the liquid tube. The hirudin anticoagulation tube sealing device for the venous retention needle can ensure the same amount of tube sealing liquid can be pushed in at each time and the tube sealing liquid can fully fill the tube cavity of the retention needle. The tube sealing liquid in the tube sealing injector is dilute solution of hirudin which has high anticoagulation effect and does not influence the test of the indexes of the serum in blood.

The invention relates to a magnetic sensing device and a real-time self-inspection method thereof. The magnetic sensing device comprises a self-inspection coil, a magnetic sensor and a signal processing circuit, wherein the self-inspection coil is loaded with a high-frequency self-inspection current so as to generate a high-frequency self-inspection magnetic field; the magnetic sensor is used for simultaneously detecting the high-frequency self-inspection magnetic field and a low-frequency external magnetic field so as to obtain magnetic field sensing signals; and the signal processing circuit is used for separating to obtain high-frequency self-inspection signals and low-frequency external field signals from the magnetic field sensing signals. The magnetic sensing device can be used for judging whether the magnetic sensor is saturated based on the high-frequency self-inspection signals and correcting the sensitivity. According to the real-time self-inspection method disclosed by the invention, the self-inspection signals and external field signals of the magnetic sensor are obtained in real time, and the detection of the external field signals is not influenced by the self-inspection signals.

The present invention provides an application of a colorimetric probe and is usded for detecting total content of hypochlorous acid and hypochlorite in an aqueous solution. The detection method comprises: preparing a probe stock solution, and separately adding different concentrations of sodium hypochlorite aqueous solutions to obtain a plurality of standard solutions; measuring an ultraviolet visible absorption light intensity value at 424 nm, and establishing a standard curve; adding an aqueous solution to be tested to the probe stock solution to obtain a sample solution; and measuring the ultraviolet visible absorption light intensity value of the sample solution at the 424 nm, and substituting into the standard curve to obtain the total content of hypochlorous acid and hypochlorite inthe aqueous solution to be tested. The colorimetric probe can instantly recognize the hypochlorous acid and the hypochlorite in the aqueous solution, and obtains the probe stock solution of which thecolor and the ultraviolet-visible absorption spectrum can change instantaneously, the colorimetric probe has specificity, high selectivity, has a linear relationship with the sodium hypochlorite witha concentration of 0mol / L to 2.8X10-4mol / L, has a large linear range, and can be used for accurate measurement of the hypochlorous acid and the hypochlorite in water environment.