32results about How to "Easy to measure distance" patented technology

A non-contact system utilizing an air-propagated ultrasound for monitoring biometric parameters is disclosed. A non-contact sensor transmits an ultrasonic wave toward a subject. The wave is reflected by the subject's skin surface back toward the sensor. Electronics in the sensor measure the small changes in displacement of the skin surface to derive a plurality of biometric parameters, including but not limited to respiration rate, heart rate, eye motion, and limb movement.

The invention provides a step counting method which comprises the steps: accelerations in all directions are obtained; a composite acceleration is calculated; a judgment of whether run or walk is made according to the amplitude of the composite acceleration. In the step counting method, an acceleration testing method adopted can distinguish the running of the human body from the walking of the human body, and a real walking from other disturbance. Besides, the invention also provides a step counting device and methods for rectifying stride and estimating moving distance.

A tape measure marker device is attachable to a common tape measure blade. The marker device has a central body portion with a pair of downwardly depending legs, each with an inwardly facing flange that helps hold the marker device to the tape measure blade. The ends of the facing flanges are spaced apart and together with the underside of the two legs and the central body portion form an open cavity that is configured to receive a common tape measure blade. The convex underside of the central body portion is adapted to nest with the top face of the tape measure blade. In operation, the marker device is manually slid along the tape measure blade until a registration mark, which may be printed, embossed or engraved on the surface of the device, aligns with a point that is to be measured. The coplanar underside of the flanges on the device allows the marker device and the tape measure blade to lie directly against a device that is to be measured. In a preferred embodiment the marker device is constructed of a resilient transparent or translucent resilient so that the graduated indicia markings on the measuring tape can be seen through the device, and so that the legs of the device can temporarily be manually spread apart wide enough for insertion of the tape measure blade.

An electric diagnostic tape measure used to measure the electrical conduction of a peripheral nerve using a standard electrical nerve stimulator. The tape measure includes a flexible, elongated body with an active recording electrode mounted or attached to its distal end. Formed on the lower surface of the active recording electrode is a conductive, adhesive layer that temporarily holds the electrode on the patient's skin during a test. Located on the top surface of the elongated body is a distance-measuring index. During a test, the elongated body is aligned so that the end of the distance-measuring index is aligned and registered with the active recording electrode. By moving the nerve stimulator to different locations adjacent to the skin adjacent to the elongated body, the distance of the nerve being tested may be measured. In one embodiment, a wire extends through the elongated body.

A device and method for projecting visible level laser lines onto a work surface and measuring distances along the level laser lines. The device includes a self-leveling laser housing that allows the lasers to level when activated. The device also includes separate distance measuring lasers and a handheld display used to measure distances from the center of the device.

Corpectomy calipers are provided that are capable of measuring both the distance and the angle between two bodies, in particular between two vertebral bodies in an individual. The calipers provided are capable of providing reliable measurements without the need for repeated measurements. The calipers described herein offer a simple and inexpensive solution. Methods of using the calipers are provided, for example, in determining the size and spacing of a void in a corpectomy or intervertebral fusion procedure.

The invention discloses a combined physical experiment desk and chair, which relates to the field of physical experiment equipment. The combined physical experiment desk and chair comprises a base, amounting plate, an experiment table surface and a seat. A fixing seat is arranged on the base, a first screw rod is arranged on the fixing seat, a first slide block is slidably connected with the first screw rod, a cylinder is arranged on the first slide block, a cylinder piston rod is connected with a first pillar, the first pillar is connected with a second pillar and a third pillar and the third pillar is connected with the seat; the third pillar is threaded and connected to an auxiliary pillar; the experiment table surface comprises a first table surface, a second table surface and a thirdtable surface which are connected in sequence. The invention has the advantages that the seat can be moved back and forth and the height can be adjusted; at the same time, through the combination ofthe first table surface, the second table surface and the third table surface, different physical experiments can be carried out to meet the needs of different experiments and different grades of students. The combined physical experiment desk and chair has the advantages of simple structure, convenient operation and safe use; light weight, easy to handle in use.

An apparatus for ascertaining a distance to an object has a light source unit for emitting an optical signal with a time-varying frequency, an evaluation device for ascertaining a distance to the object based on (a) a measurement signal that arose from the signal and was reflected at the object and (b) a reference signal that was not reflected at the object. The apparatus has also a dispersive element disposed in the signal path of the optical signal and an optical position sensor disposed downstream of this dispersive element in the signal path.

A device and method for projecting visible level laser lines onto a work surface and measuring distances along the level laser lines. The device includes a self-leveling laser housing that allows the lasers to level when activated. The device also includes separate distance measuring lasers and a handheld display used to measure distances from the center of the device.

The invention discloses a hole puncher and relates to the field of mechanical equipment. The hole puncher comprises a hole puncher body, and the hole puncher body comprises a base, a hole punching plate, a spring, a hole punching die and a pivoted lever. The base is provided with a graduated scale, distance measurement is facilitated during hole punching, the base is provided with a cavity, a lantern ring is arranged in the cavity, space is saved, the cost is reduced, the lantern ring can be used for punching different holes simultaneously together with the hole punching die, the protruded position of the base and the hole punching plate are provided with a first double-accommodating hole and a second double-accommodating hole respectively, and the first double-accommodating hole and the second double-accommodating hole are connected with the spring through the pivoted lever. The hole punching plate is provided with a spiral groove, the hole punching die is provided with a thread, the hole punching plate and the hole punching die are connected through the spiral groove and the thread, the hole punching plate is connected with a force application arm, and by utilizing the lever principle, the holes can be punched easily.

The invention discloses a handheld millimeter wave distance measurement device applied to a to-be-measured target. The handheld millimeter wave distance measurement device comprises a target aiming unit and a millimeter wave unit; the millimeter unit is connected to the target aiming unit; the target aiming unit is used for aiming the to-be-measured target; after the target aiming unit aims at theto-be-measured target, the millimeter wave unit sends a millimeter wave to the to-be-measured target, so that the to-be-measured target reflects a reflected wave to the millimeter wave unit; after the millimeter wave unit receives the reflected wave, the millimeter wave unit processes the reflected wave so as to compute the distance between the to-be-measured target and the millimeter wave unit.

The invention relates to a device and method for reducing noise of a marine propeller through pulse laser etching, the device comprises a mechanical arm, a laser head used for emitting laser and a rotating device, the rotating device is arranged on an external carrier below the mechanical arm and can rotate in the circumferential direction, and the propeller to be machined is arranged on the rotating device. And the laser head is arranged at the tail end of the mechanical arm and can rotate in the circumferential direction along with the rotating device, the laser head is rotationally arranged at the tail end of the mechanical arm, and laser emitted by the laser head can irradiate the surfaces of blades of the propeller below the laser head. The mechanical arm drives the laser head to move so that laser emitted by the laser head can machine the surface of the propeller blade of the propeller, modification treatment on the surface of the propeller blade of the propeller can be rapidly and efficiently completed, and a composite microstructure is formed on the surface of the propeller blade of the propeller; and the noise generated when the propeller works in fresh water and seawater is reduced, the structure is simple, the machining speed is high, and environmental protection and no pollution are achieved.

A method for measuring inertial parameters of an infinite-model powertrain. This measurement method is based on the MPC700 moment of inertia test bench and its supporting measurement software. The measurement method includes the following steps: taking feature points, performing three-coordinate measurement on feature points, and establishing engine coordinates system, place the powertrain, measure, and obtain measurement results. In this design, multiple characteristic points are taken on the surface of the powertrain, and three-coordinate measurement is performed on them, and the engine coordinate system is established by using some of the characteristic points, and the position of the remaining characteristic points in the engine coordinate system is measured by 3D modeling software. Coordinates, the coordinates of the feature points in the engine coordinate system are directly input in the measurement software, and the inertia parameters can be accurately measured without the digital model of the powertrain to be tested, and it is easy to implement, without the need to carry out three coordinates of the powertrain many times Measurement.

The invention discloses an optical ranging device for an automobile. According to the device, a visual borizon reference point A is set on a front windshield of the automobile, a visual borizon reference point B is set below the windshield, the observing visual borizon is determined by judging whether a mirror point B' of the visual borizon reference point B in the windshield coincides with the visual borizon reference point A or not, and the distance between an object in the distant place and a driver is directly observed through a mirror image of a scaleplate printed or stuck on the windshield or an objective scaleplate located below the windshield in the windshield according to the similar triangle principle. The device changes visual range estimation into actual ranging, is simple, easy to operate and low in cost and can be not only independently used by serving as an automobile accessory, but also prefabricated in a naked automobile just leaving a factory.

The invention discloses an industrial robot positioning and measuring device. The industrial robot positioning and measuring device comprises a first fixing plate. One side of the upper end of the first fixing plate is provided with a second fixing plate. The other side of the upper end of the first fixing plate is provided with a third fixing plate. The first fixing plate, the second fixing plateand the third fixing plate are perpendicular mutually. The upper end of one side, adjacent to the second fixing plate, of the first fixing plate is provided with a first fixing base. One side of theupper end of the first fixing base is provided with a first motor. The other side of the upper end of the first fixing base is provided with two groups of first limiting blocks. The upper end, positioned at one side of the first fixing base, of the first fixing plate is provided with a second fixing base. One side, adjacent to the first fixing base, of the second fixing base is provided with two groups of second limiting blocks. The other side of the second fixing base is provided with a first connecting device. Two groups of first sliding rods are alternately installed between the first limiting blocks and the second limiting blocks. The two groups of the first sliding rods are provided with a first sliding plate. The lower end, positioned between the first motor and the first connectingdevice, of the first sliding plate is provided with a first conveying belt. The upper end of the first sliding plate is provided with a first connecting block.