Abstract: A drone having at least one thrust device and being provided with a loop coupled to the drone. The loop is configured for fastening a rope to the drone and is provided with a rope connector for establishing a releasable connection with the rope in operational use of the drone. The loop is configured for guiding the rope connector from a first position under the drone along a predefined path to a second position over the drone i) by rotation of the loop itself or ii) by translation of the rope connector along the loop, or iii) by a combination of said rotation and said translation, wherein the predefined path is configured for ensuring a minimum distance between the rope connector and the least one thrust device of the drone.

Abstract: An apparatus is arranged to control a quantity of binder resin that is carried by a thread, the apparatus comprising at least one first tine row being arranged parallel and displaceably to at least one second tine row, wherein a guide track for the thread is formed transversely to the tine rows and a displacement of at least one tine row the guide track. A method for controlling the quantity of binder resin by using tines is described as well.

Abstract: A method is for generating a freeroom for a mast element in a ground. The method includes the steps: a) drilling a first annular recess into the ground, the first recess having: a first diameter; and a first depth; b) drilling a second annular recess in the ground, the second recess being arranged to receive the mast element, and the second recess: having a diameter which is smaller than the first diameter; having a second depth which is larger than the first depth; surrounding a first core of the ground; and being surrounded by the first recess; wherein there is, defined between the first recess and the second recess, a second core which can be removed to generate a freeroom.

Abstract: A method is for mounting an object, such as a line sensor, to a power line. The method includes: i) suspending and tensioning at least two ropes between a physical ground and a power line; ii) coupling a rope robot with the at least two ropes in such a way that the rope robot can climb up and down the at least two ropes in operational use; iii) providing an object on the rope robot; iv) making the rope robot climb up to the power line to bring the object close to the power line; v) mounting the object to the power line with the rope robot, and vi) decoupling the rope robot from the object and making the rope robot climb down the at least two ropes. A rope robot is disclosed for carrying out this method.

Abstract: A system and a method are for positioning a drilling rig arranged to drill in a ground. The system has a positioning jig including at least one coupling portion; a drilling rig including at least two coupling portions; and at least two anchoring elements including an upper coupling portion and a lower coupling portion. The lower coupling portion of the anchoring element is arranged to be releasably fixed to the ground. The upper coupling portion of the anchoring element is arranged to be connected to the coupling portion of the positioning jig and to the coupling portion of the drilling rig, so that the upper coupling portion of the anchoring element can optionally be connected to the positioning jig or the drilling rig.

Abstract: A system is for monitoring a power distribution network having mast constructions carrying at least one power line. The system has at least two smart modules, each being affixed to a respective mast construction and designed for wireless communication with each other for forming a main wireless communication network along the power line. The system has a sensor system affixed to a respective one of the mast constructions. The sensor system is designed for determining at least one quantity or event of the network and for communicating the quantity or event to a respective smart module, which are designed for communicating information associated with the quantity or event along the network, for being remotely monitored. The smart modules are placed outside the Live working and Vicinity zones in accordance with the EN50110-1 standard for power networks, and at least one sensor system is contained in each smart module itself.

Abstract: An apparatus is arranged to control a quantity of binder resin that is carried by a thread, the apparatus comprising at least one first tine row being arranged parallel and displaceably to at least one second tine row, wherein a guide track for the thread is formed transversely to the tine rows and a displacement of at least one tine row the guide track. A method for controlling the quantity of binder resin by using tines is described as well.

Abstract: A fastening element is for fastening a hollow composite pole to the ground at a location where a slit-formed opening is present in the ground. The fastening element has a lower end portion that is configured for being positioned in the slit-formed opening, wherein a conical portion of the composite pole is abutting a conical upper portion of the fastening element. A method is for fastening a hollow composite pole to the ground.

Abstract: An overvoltage protection circuit is for a power supply including a power converter, the overvoltage protection circuit having a comparator. The overvoltage protection circuit uses the comparator for comparing the power supply voltage with the reference voltage, and for producing a power supply shutdown signal on the shutdown output terminal when the power supply voltage exceeds the maximal power supply voltage, and for latching said power supply shutdown signal on the shutdown output terminal even if the power supply voltage subsequently drops to a level below the maximal power supply voltage. The overvoltage protection circuit has a reset circuit coupled to the first input of the comparator. The reset circuit is configured for pulling the signal level on the first input below said reference value such that the power supply shutdown signal is reset when a reset signal is given to the reset circuit.

Abstract: A core drill is arranged to drill in the ground, the core drill having a sleeve with a first end portion and a bit ring which is detachably attached in a rotationally rigid manner to the first end portion, one of the sleeve and the bit ring having a groove with two converging side faces, and the other one of the sleeve and the groove having a protrusion with two complementary side faces, and the groove and the protrusion being arranged to engage with each other.

Abstract: A method is for generating a freeroom for a mast element in a ground. The method includes the steps: a) drilling a first annular recess into the ground, the first recess having: a first diameter; and a first depth; b) drilling a second annular recess in the ground, the second recess being arranged to receive the mast element, and the second recess: having a diameter which is smaller than the first diameter; having a second depth which is larger than the first depth; surrounding a first core of the ground; and being surrounded by the first recess; wherein there is, defined between the first recess and the second recess, a second core which can be removed to generate a freeroom.

Abstract: A device, a system and a method are for attaching a crossbar to a hollow composite pylon where the crossbar is arranged to carry at least one conductor. The hollow composite pylon, the crossbar and the conductor form components of a pylon structure for the transmission or distribution of power. The device has an adapter, which, in the position of application, is pivotably attached to the crossbar, is slideable at least into or over the, in the position of application, upper end portion of the hollow composite pylon and mainly along the longitudinal axis of the hollow composite pylon during part of the installation phase.

Abstract: A system and a method are for positioning a drilling rig arranged to drill in a ground. The system has a positioning jig including at least one coupling portion; a drilling rig including at least two coupling portions; and at least two anchoring elements including an upper coupling portion and a lower coupling portion. The lower coupling portion of the anchoring element is arranged to be releasably fixed to the ground. The upper coupling portion of the anchoring element is arranged to be connected to the coupling portion of the positioning jig and to the coupling portion of the drilling rig, so that the upper coupling portion of the anchoring element can optionally be connected to the positioning jig or the drilling rig.

Abstract: A device, a system and a method are for attaching a crossbar to a hollow composite pylon where the crossbar is arranged to carry at least one conductor. The hollow composite pylon, the crossbar and the conductor form components of a pylon structure for the transmission or distribution of power. The device has an adapter, which, in the position of application, is pivotably attached to the crossbar, is slideable at least into or over the, in the position of application, upper end portion of the hollow composite pylon and mainly along the longitudinal axis of the hollow composite pylon during part of the installation phase.

Abstract: An overvoltage protection circuit is for a power supply including a power converter, the overvoltage protection circuit having a comparator. The overvoltage protection circuit uses the comparator for comparing the power supply voltage with the reference voltage, and for producing a power supply shutdown signal on the shutdown output terminal when the power supply voltage exceeds the maximal power supply voltage, and for latching said power supply shutdown signal on the shutdown output terminal even if the power supply voltage subsequently drops to a level below the maximal power supply voltage. The overvoltage protection circuit has a reset circuit coupled to the first input of the comparator. The reset circuit is configured for pulling the signal level on the first input below said reference value such that the power supply shutdown signal is reset when a reset signal is given to the reset circuit.

Abstract: A three band whip antenna has a base where the whip antenna along its whole length or part of its length, has a lowest frequency band antenna element and an intermediate frequency band antenna element, wherein a highest frequency band antenna is included in the whip antenna at a position closer to base than the intermediate frequency band antenna element.

Abstract: A system and method are for reducing the probability of detection of a Line of Sight type communication and sensor mast. The mast has an upper portion extending upwardly relatively the ground, and a lower portion closer to the ground than the upper portion. The mast at the upper portion is equipped with at least a communication or sensor element. The mast is equipped with an actuator that, based on calculated instructions, is designed to alter the elevation above ground of the mast upper portion so as to achieve an acceptable signal quality with the upper portion of the mast at the lowest possible elevation.

Abstract: A method and device are for calibrating an antenna. At least one switch is spanning sections of a radiating antenna element. A controller is designed to selectively close the switch to be conductive, thus effectively short-circuiting the actual section of the antenna element. The method includes: installing the antenna for field use at least for transmission or reception of signals; then measuring the reflected power from the antenna at least for a number of frequencies or frequency ranges at more than one setting of the switch; and storing the settings that gives a desirable result of reflected power at an actual frequency or frequency range.

Abstract: A system and method are for reducing the probability of detection of a Line of Sight type communication and sensor mast. The mast has an upper portion extending upwardly relatively the ground, and a lower portion closer to the ground than the upper portion. The mast at the upper portion is equipped with at least a communication or sensor element. The mast is equipped with an actuator that, based on calculated instructions, is designed to alter the elevation above ground of the mast upper portion so as to achieve an acceptable signal quality with the upper portion of the mast at the lowest possible elevation.