The present invention discloses an attitude self-compensation method to the transmitters of wMPS based on inclinometer, including the following steps: step 1: arranging inclinometer-combined transmitters according to the mechanism structure of the transmitters; step 2: building a horizontal reference frame based on an automatic level and guide rail; step 3: calibrating rotation relationship between the inclinometer and transmitter coordinate systems by referring to the horizontal reference frame according to the measurement model of the inclinometer and rotation measurement model of the transmitter; step 4: updating the orientation parameters of the transmitters in real time according to the output values of the inclinometer and compensation algorithm for the orientation parameters. The method of the present invention aims at self-compensating the orientation parameters of transmitters in real time and increasing the stability of the system. By the attitude change of the inclinometer, this method can compensate the attitude change of transmitters in real time, improve the stability of the measurement system, and adapt to the harsh environment.

A measurement device (100) for a golf course green comprises: a distance measurement unit (30) having a pair of laser transmitter/receivers (32) for emitting a pair of laser beams (L; L1, L2), for distance measurement, outwardly at a predetermined emission angle with respect to the forward direction (CEN); a control unit (50) for generating hole-cup position information and hole-cup gradient information from an arithmetic operation of data on the distance measured by the pair of laser transmitter/receivers (32) of the distance measurement unit (30) and data on the emission angle; and an output unit (60) provided outside a casing (10) so as to output the hole-cup position information and hole-cup gradient information generated by the control unit (50).

A tool, such as a digital level, having multiple methods of indicating the orientation of the level. One embodiment of the level includes two or more accelerometers arranged in complimenting orientations, such as 90 degrees with respect to each other. The complimenting orientation allows for more precise measurements from less expensive accelerometers compared to a level with a single more expensive accelerometer. A power supply module, and an associated control module in charge of the power supply, selectively provides power to the accelerometers and displays based in part on user input, movement of the level, and the disposition of the level.

A computing device includes a display device, an accelerometer, and an orientation determination module. The orientation determination module sends a heartbeat of orientation data obtained by the accelerometer to a host device at a first data transfer frequency, and compares a plurality of orientation data most recently received from the accelerometer for at least one axis of orientation to the current orientation data measurement. In response to a difference between the current measurement and any of the plurality of orientation data most recently received from the accelerometer exceeding a threshold, the computing device sends the current orientation data to the host device at a second data transfer frequency, and adjust content displayed on the display device based on the current orientation data received by the host device.

Disclosed is a horizontal or vertical line test device for testing for an error by receiving a horizontal or vertical line laser emitted from an emitting device when a building is constructed. The horizontal or vertical line test device comprises: a reference line part which can be compared with at least one of a horizontal line laser and a vertical line laser; and a light reception part which receives at least one of an incident horizontal line laser and an incident vertical line laser.

A leveling instrument includes a generally elongate carrier defining a carrier axis. A first liquid-filled bubble vial is mounted on the carrier and defines a first vial axis and an internal generally barrel-shaped surface of revolution about the first vial axis formed by a curve having a predetermined curvature to exhibit a first sensitivity. A second liquid-filled bubble vial defines a second vial axis and has a generally barrel-shaped surface of revolution about the second vial axis and formed by a curve having a curvature less pronounced than the predetermined curvature of the first vial to exhibit a second sensitivity greater than the first sensitivity, the first and second vial axes being generally parallel to each other. If the vials are curved they are similarly oriented and have different curvatures to exhibit different sensitivities. A method of using the multi-vial leveling instrument is described.

A level including a sensor that detects a tilt angle; a display unit including a plurality of strip-shaped display members that linearly emits light by an LED to display the tilt angle; and a controller that receives an output signal from the sensor and outputs a control signal so that a specific strip-shaped display member glows. The strip-shaped display members include one horizontal strip-shaped display member positioned at a middle of the display unit and a plurality of strip-shaped display members for tilt-angle display that has tips bent toward a center of the display unit. LEDs are attached to ends of the strip-shaped display members, respectively, and a pair of strip-shaped display members which is point-symmetrical with respect to the center of the display unit simultaneously glows according to the tilt angle.

The sensor (1) for determining an orientation of the sensor in a gravity field comprises a ball (2) and a rolling surface (R) describing a generally concave shape on which the ball can roll inside the sensor. A further surface (F) is arranged opposite said rolling surface, and a light emitter (E), a light detector (D) and another light emitter or detector is provided. A region (R) within which the ball (2) can move is limited by at least the rolling surface (R) and the further surface (F). And the light emitters (E) and detectors (D) are arranged outside the region (R) for emitting light through the rolling surface (R) into said region and detecting light exiting the region (3) through the rolling surface (R) or for emitting light through the further surface (F) into said region (R) and detecting light exiting said region (R) through the further surface (F). Corresponding measuring methods and manufacturing methods are described, too.

The present disclosure provides a method for controlling a handheld gimbal and a handheld gimbal. The method for controlling a handheld gimbal includes: upon rotation of a handheld gimbal, obtaining current attitude information of a photographing device and current attitude information of a handle; according to the current attitude information of the photographing device and the current attitude information of the handle, obtaining target attitude information of the photographing device; according to the current attitude information of the photographing device and the target attitude information, controlling a shaft joint of the handheld gimbal to rotate so that the attitude of the photographing device follows the attitude of the handle.

A stage includes a sample table on which a sample is placed, a first drive mechanism moving the sample table in a first direction; a position measurement element measuring a position in the first direction that is a driving direction of the sample table. The stage also has a scale element having a scale measurement axis that is parallel to a first measurement axis in the first direction based on the position measurement element and is different from the first measurement axis in height, and measuring the position of the sample table in the first direction. A controller calculates the orientation of the sample table by using a measurement value by the position measurement element and a measurement value by the scale element and correcting the Abbe error of the sample table.