摘要:
An apparatus for conversion of mechanical energy to electrical energy having a piezo transducer (1), which is formed from two or more layers, and having a mass/spring system (2, 3, 4), which can oscillate, in a holder (5), which is caused (6) to oscillate mechanically when stimulated, which oscillations periodically deform the piezo transducer such that an alternating voltage occurs on the connecting wires (7) of the transducer.
摘要:
The energy self-sufficient radiofrequency transmitter has at least one electromechanical transducer with a rectifier circuit connected downstream and with a voltage converter circuit. A logic circuit configuration is connected to the voltage converter circuit. The logic circuit configuration has a sequence controller a memory in which an identification code is stored. The energy self-sufficient radiofrequency transmitter also has a radiofrequency transmission stage that is connected to the logic circuit configuration and a transmission antenna.
摘要:
A transmission system is provided with a superconductive cable having three phase conductors and a cryostat, surrounding the phase conductors, and encasing a hollow space, for conducting a cooling agent. For the three phase conductors, a common neutral conductor is provided, being made of electrically normally conducting material, carried out as insulating round conductor and placed outside the cryostat and next to it. The cryostat is made of a circumferentially enclosed, thermally insulated sheath.
摘要:
An initialization method for a wireless network is disclosed with at least one receiver node and/or switching node and transmitter node in which one transmitter node is allocated to at least one receiver node. An operating method is also disclosed for a wireless network with at least one receiver node and/or switching node and transmitter node. At least one allocation is made between a transmitter node and a receiver node after such an initialization method with the steps of: transmission of a wireless message at the transmitter node, reception of the wireless message at one or more switching nodes, and if the switching node is not the receiver node, transmission of the wireless message at the switching node and reception of the message at the preset receiver node.
摘要:
A strand anchor, especially for use in mining, comprising a strand having several wires, an anchor head, an anchor plate supported by the anchor head for placement onto the rock, should make it possible to discharge the displaced air when the curable material is being injected into a drilled hole, without the need for a separate hose. At least one longitudinal channel, preferably a plurality of longitudinal channels, is/are formed between the wires of the strand, so that air can be discharged to the outside through the strand through the at least one longitudinal channel when the curable material is being injected into a drilled hole.
摘要:
A receiver device, A system and a method for reception of a signal having an amplitude that has been modulated with information, wherein a resistive element is provided that converts an electrical quantity into a physical parameter.
摘要:
A module receptacle having a main frame arranged to hold a mountable functioning module in a specified position with respect to a covering frame. The covering frame can be attached by means of at least one fastening element to the main frame. The covering frame is at least large enough to cover the main frame.
摘要:
A ground anchor or rock anchor is provided that includes an anchor tension member composed of one or more individual elements, such as steel bars, steel wires, or steel wire strands. While the anchor tension member is intended to be introduced into a drilled hole and anchored there, the anchoring of the anchor tension member at the exposed end of the drilled hole is achieved with the aid of anchor head. To this end, the anchor head comprises a support element to bear directly or indirectly against the underlying rock or substratum, and an anchoring component for tensioning the individual elements, which can be brought into a frictional connection with the individual elements while bearing against the support element. In addition, a cap, which extends around the anchoring component and the ends of the individual elements, protects the exposed end of the anchor head. For secure attachment of the cap to the rest of the anchor head, between the support element and anchoring component, a connecting element is arranged that has a first closure component at its circumferential side, and has a second closure component of complementary shape on its circumferential side, wherein the first and second closure component work together to produce a frictional connection between the cap and connecting element.
摘要:
A thermogenerator with a first electrical voltage source (20) having a first voltage output (30) and a second electric voltage source (40) having a second voltage output (50). The first electrical voltage source (20) is formed of a first thermoelectric element (25), and a third voltage output (60) is provided, coupled to the first voltage output (30) and the second voltage output (50). A method is disclosed for the conversion of thermal energy into electrical energy, in which electrical voltage is generated by a first thermoelectric element (25), and where voltage is generated at least some of the time by means of a second voltage source (40), and where, by means of a converter circuit (150), the electric voltage from the first thermoelectric element (25) is converted to a higher voltage level.
摘要:
A system and a method are disclosed with at least one presence detector, wherein the presence detector has a radio transmitter. The system further comprises at least one radio receiver that is constructed in such a manner as to receive and evaluate signals of the presence detector transmitted via radio. The radio receiver further comprises at least one device that acts on downstream units as a function of the evaluation result.