8 results about "Binary sensors" patented technology

There is described a method of determining a rotor position indicator (166, theta), in particular a rotor electrical angle, of an electrical machine (100) having a stator (102) and a rotor (103), in particular of a wind turbine (160), in particular of a permanent magnet synchronous generator, the method comprising: receiving encoder measurement data (168) regarding a rotor position from an incremental mechanical encoder (127), the incremental mechanical encoder is mounted so as to sense a relative rotor position; receiving Hall effect sensor measurement data (169) from at least one, in particular at least three, Hall effect sensors (120), in particular binary sensors, which are mounted at the stator (102) in order to sense magnetic field variations; the rotor position indicator (166) is determined based on the encoder measurement data (168) and the Hall effect sensor measurement data (169).

The invention provides a binary sensor network extensible distributed estimation method and system based on an energy harvesting and dynamic event triggering protocol, and belongs to the field of sensor network control. The problem that the service life of a sensor network node is short due to the fact that an existing sensor node is limited in data communication energy is solved. Comprising the following steps: establishing a linear dynamic model based on binary sensor network measurement; obtaining useful measurement information based on the difference between the true value and the estimated value of the binary sensor; a dynamic event triggering protocol and an energy harvester are introduced to schedule transmission of neighbor node information; constructing a distributed estimator for each binary sensor, and giving an expected finite time domain performance constraint; sufficient conditions are established for the presence of a desired distributed estimator. The communication cost is reduced, and the system reliability is improved; the communication burden is relieved, and the probability of incomplete information is reduced; the problem of insufficient energy during communication between the nodes is solved, and the stability of the system is enhanced.

The invention relates to a method for determining the volume of liquid available in a reservoir (2) for brake fluid of a brake system (1), wherein the brake system (1) has a pressure generator (4, 9) which is fluidically connected on the one hand to the reservoir (2) and on the other hand to at least one brake circuit (8), which pressure generator can be actuated for generating a hydraulic pressure in the brake system (1) in the event of extraction of brake fluid from the reservoir (2), and wherein a predefined limit value (F) below the filling level for brake fluid in the reservoir (2) is monitored by means of a binary sensor (11) assigned to the reservoir (2). It is provided that the actuation of the pressure generator (4, 9) is monitored, and that the volume of liquid available is determined from the actuation of the pressure generator (4, 9) when the current filling level is below the limit value (F).

The present invention relates to the field of network security technology, and particularly to a replay attack detection method and system for binary measurement FIR system identification. The method includes: the finite impulse response (FIR) subsystem obtains the input of the FIR subsystem, and measures the output of the FIR subsystem through a binary sensor to obtain a measurement result; the communication network transmits the measurement result to the estimation center; the estimation center transmits the received data to the detector; the detector designs a replay attack detection algorithm based on the received data and the subsystem input, and performs replay attack detection on the process of the communication network transmitting the measurement result to the estimation center according to the replay attack detection algorithm, so as to obtain a replay attack detection result for binary measurement FIR system identification. The present invention takes the quantized FIR system as the object, studies the problem of replay attack detectability from the perspective of system identification, and detects replay attacks by increasing the input excitation and combining the designed algorithm.

The invention discloses an unknown environment agent collaborative planning method and system based on sequential single auction, and belongs to the field of task allocation and path planning. A global tag Petri network model is constructed according to environment information and task information; performing task point library reduction on the global tag Petri net model by using a task point abstraction method, and combining redundant grid libraries to obtain an abstracted global tag Petri net model and a task Boolean specification; according to the abstracted global tag Petri network model and a task Boolean specification, performing task allocation on each robot by adopting an improved task allocation method based on an auction algorithm to obtain a task allocation result of each robot and an initial path set of each robot; constructing a local tag Petri net model of each robot, and generating an initial path strategy; and the decision state of the initial path is expanded, a binary sensor is used for simulating environment cognition, and a complete motion strategy of each robot is obtained according to sensor signals.

The present invention relates to a magnetic displacement sensor (100) for a braking system of a vehicle, wherein the displacement sensor (100) comprises a proportional sensor element (106) and a binary sensor element (108), wherein the proportional sensor element (106) is configured to provide a proportional signal (110) proportional to a change in a magnetic field (104) of a relatively movable magnetic sensor (102) of the braking system, and wherein the binary sensor element (108) is configured to change a signal state (204) of a binary signal (112) at a predefined threshold value of the magnetic field (104).

A device for detecting freshness of a perishable item is provided. The device includes a plurality of binary sensors for detecting an analyte of interest in the perishable item, an integrated circuit for converting information detected by the plurality of sensors into a signal, and an antenna portion for receiving and transmitting the signal from the integrated circuit. The antenna portion detects a voltage drop data based on the plurality of binary sensors and transmits the voltage drop data to an external receiver. The plurality of sensors, the integrated circuit, and the antenna portion are also printed on a single sheet such that the device is unitary.

It is described a method of determining a rotor position indicating quantity (166, θ), in particular rotor electrical angle, of an electrical machine (100) having a stator (102) and a rotor (103), in particular permanent magnet synchronous generator, in particular of a wind turbine (160), the method comprising: receiving encoder measurement data (168) regarding rotor position from an incremental mechanical encoder (127) installed in order to sense rotor position; receiving Hall effect sensor measurement data (169) from at least one, in particular at least three, Hall effect sensor (120), in particular binary sensors, installed at the stator (102), in order to sense magnetic field change; determining the rotor position indicating quantity (166) based on the encoder measurement data (168) and the Hall effect sensor measurement data (169).