Spectra Precision Ab

Aga Aktiebolag

Trimble Ab

Geotronics Ab

Geotronics Metaltech Ab

Geotronics

Getronics Ab

Lars A Ericsson

Klas R Wiklund

Rudolf Wiklund

Leif K-g Andersson

Mikael Hertzman

Hans Hagglund

N P Hertzman

Olle Engdahl

Mikael Herztman

A device and method for determining the position for a working part of a machine with a position-determining apparatus is disclosed. A detector is placed at a defined place on the machine to determine the position in a fixed coordinate system. A positional relationship device determines the positional relationship of the working part in relation to the detector in a machine-based coordinate system. A calculating device calculates, with signals from the position-determining apparatus and the positional relationship device, the position of the working part in the fixed coordinate system. The position-determining apparatus comprises an inclination- and orientation-measuring device that measures the instantaneous position and orientation of the position of the machine in the fixed coordinate system. The calculating device converts the measuring result from the position-determining apparatus and the positional relationship device to give the instantaneous position and orientation of the working part in the fixed coordinate system.

Device and method for determining the position of a working part

The invention relates to a device and to a method for determining the position for a working part of a tool on a working machine with a position-determining apparatus (a,b,). At least one detector equipment (a,b,) is placed at a defined place on the working machine () in order to determine the position of this position in a fixed coordinate system. At least one positional relationship device () determines the positional relation of the working part in relation to the detector equipment in a machine-based coordinate system. A calculating device () calculates, with signals from the position-determining apparatus and the positional relationship device, the position of the working part in the fixed coordinate system. The position-determining apparatus comprises an inclination- and orientation-measuring device (a,b,) so that the apparatus measures both the instantaneous position and orientation of said position of the working machine in the fixed coordinate system. The calculating device () converts the measuring result from the position-determining apparatus and the positional relationship device in order to give the instantaneous position and/or orientation of the working part in the fixed coordinate system.

The invention relates to a device and to a method for determining the position for a working part of a tool on a working machine. A position determining apparatus is placed in a defined position on the working machine in order to determine the position of this place in a coordinate system fixed in space. The position-determining apparatus comprises partly a relatively slow determining device ( ), which at time intervals measures the actual position of the machine , and partly a relatively fast determining device ( ; ACC , ACC ) which reacts on position changes of the machine in order to calculate and up date the determination between the said time intervals.

A surveying system is presented comprising a surveying equipment and a radio navigation unit comprising a radio navigation antenna and a radio navigation receiver, both removably connectable both on the survey equipment and on a survey object. The object is provided with at least one target for the surveying equipment to be directed to. A removable panel co-operates with the radio navigation unit and with the survey equipment. The panel comprises a computer provided with a program system adapted for operating both the radio navigation receiver and the surveying equipment.

Surveying method and surveying system comprising a radio navigation unit

Electronic distance measuring instrument

Arrangement for performing position determination

The device has a lance. The lance is moved towards said molten bath level. An antenna is provided at a downward end of the lance for coaction with the slag interface (interfaces), when the lance is moved towards the slag interface (interfaces). A sensitive detection circuit is connected to said antenna. The antenna is during its downward movement capacitively coupled to said slag layer, and the detection circuit detects a predetermined impedance change (predetermined impedance changes) at the antenna provided as it is moved towards the interface (interfaces).

Device for detecting the level of the slag in a metal pool

A measuring device measures the width of trees and other vertically disposed objects at a distance from these objects. An aiming instrument cites various points along the object and measures a distance to the object as well as provides a signal proportional to a plumb line angle sensor, a signal proportional to a horizontal angle device, and a distance measuring signal. A computer coupled to the aiming instrument will compute the diameter of the trees or other vertically disposed objects from the distance signal, angle sensor signal and horizontal angle device.

Device for measuring substantially vertical, circular-cylindrical objects

Electronic levelling cell

An apparatus for determining the position of an object which is moving along an axis at frequent intervals of time and without making mechanical contact with the object, comprising position determinator means for providing an accurate position determination of said object at relatively long intervals of time or position, means associated with said object comprised either of the combination of speedometer means and electronic integration means for time integrating the output of said speedometer means at relatively frequent time intervals for providing an instantaneous measurement signal or the combination of accelerometer means and electronic integration means for double time integrating the output of said accelerometer means at relatively frequent time intervals for providing an instantaneous measurement signal, and means for correcting the value of said instantaneous measurement signal at said relatively long intervals of time or position to be equal to said position determination made by said position determinator means.

Position determination equipment

A method and apparatus are provided for balancing out interference caused by stray coupling between the internal circuits of a distance measuring apparatus of the phase-type in a simple manner which produces a substantial increase of the usable measuring range. At least two groups of mutually separate distance measurements are performed, with each group including at least one measurement operation. For each pair of groups of distance measurements, one measuring group is effected with the transmitter signal in a first phase and the other measuring group is effected with the transmitter unit of the transmitter section supplied with a transmitter signal in a second phase which is displaced substantially 180.degree. relative to the first phase. The mean value or the mean values of the measuring results in each measurement group are thereafter formed, with this calculation being made either by hand or automatically. Preferably, the invention includes a controllable phase shifter to provide the phase shift of the measurement signals supplied to the transmitter.

Growing community of inventors

Taby, Sweden

Lars A Ericsson