Level tools and level indicating devices for determining the angle of a vertically oriented object relative to both level and plumb capable of being read without requiring the tool's user to change his or her position or the position of the level tool.

Level tools and level indicating devices for determining the angle of a vertically oriented object relative to both level and plumb capable of being read without requiring the tool's user to change his or her position or the position of the level tool.

A plumb-bob device has an enclosure with three lasers projecting from one end, one of which projects a horizontal lane, one in a vertical plane, and one with crossed planes from a laser that is suspended to swing but not rotate about an axis. The device may be attached to an object to be leveled or plumbed, and moving the object until the lasers coincide accomplishes plumbing the object.

The present invention provides a device (100) for suspending a plumb line over a corner region of a wall to be built, comprising an elongate support member (102) having a first end region (104) and a second end region (106); a first locating region (108) disposed proximal the first end region for locating the device on a first support surface; and a second locating region (112) disposed between the first end region and the second end region for locating the device on a second support surface, wherein the first locating region and/or the second locating region is/are selectively movable in at least a longitudinal direction relative to the elongate support member. A kit and method of suspending a plumb line over a corner region of a wall to be built are also provided.

The present invention provides a device (100) for suspending a plumb line over a corner region of a wall to be built, comprising an elongate support member (102) having a first end region (104) and a second end region (106); a first locating region (108) disposed proximal the first end region for locating the device on a first support surface; and a second locating region (112) disposed between the first end region and the second end region for locating the device on a second support surface, wherein the first locating region and/or the second locating region is/are selectively movable in at least a longitudinal direction relative to the elongate support member. A kit and method of suspending a plumb line over a corner region of a wall to be built are also provided.

A laser leveling tool comprises at least one laser diode for emitting a laser beam; a micro controller unit for controlling the operation of the laser diode; and a thermal sensor for sensing the internal temperature of the laser leveling tool; wherein the micro controller unit is configured to reduce the operation power of the laser diode when the sensed internal temperature reaches a temperature threshold.

A method for aligning a pump with a wellhead begins with the steps of attaching a target assembly to the pump and attaching an emitter assembly to the wellhead. The method continues with the step of emitting a beam of light from the emitter assembly to the target assembly. The method concludes with the step of determining the position of the pump with respect to the wellhead by evaluating the projection of the light beam on the target assembly. Based on this determination, the pump can be accurately aligned with the wellhead.

A sensor positioning device includes an inter-sensor distance measurement jig that measures a distance between two sensors, and is a reference when setting the distance between the two sensors to a target distance, and reference-setting jigs of sensor height position, each including a weight and a weight suspension member, a lengthwise direction of which is in a vertical direction when the weight is suspended, and each performing setting of a distance which is a total of a vertical direction dimension of the weight, a length of the weight suspension member, and a distance from an upper end of the weight suspension member to the sensor such that the distance coincides with a target height of the sensor, when the weight is in contact with a reference surface, in a state where the weight is attached to a sensor holding jig by the weight suspension member.

A sensor positioning device includes an inter-sensor distance measurement jig that measures a distance between two sensors, and is a reference when setting the distance between the two sensors to a target distance, and reference-setting jigs of sensor height position, each including a weight and a weight suspension member, a lengthwise direction of which is in a vertical direction when the weight is suspended, and each performing setting of a distance which is a total of a vertical direction dimension of the weight, a length of the weight suspension member, and a distance from an upper end of the weight suspension member to the sensor such that the distance coincides with a target height of the sensor, when the weight is in contact with a reference surface, in a state where the weight is attached to a sensor holding jig by the weight suspension member.

An advanced monitoring device and an implementation method for a whole-process deformation curve of a surrounding rock during tunnel excavation is disclosed, comprising a steel pipe elastic body, a cathetometer structure and an embedded optical fiber, and an implementation step; the cathetometer is an equidistant series structure, and fixed in the steel pipe; the embedded optical fiber is encapsulated in the surface slot of the steel pipe; the cathetometer and the embedded optical fiber and the steel pipe form a deformation coordination structure, and the deformation of the surrounding rock can be deduced by calculating the variation of the cathetometer and the deformation of the optical fiber. The invention can test and calculate the deformation curve of the surrounding rock in front of the excavation face during tunnel excavation, and provide support for engineering dynamic design, construction and safety.