An alarm detection device includes: a sound receiver for receiving an external sound to output a first signal; a signal processing circuit coupled to the sound receiver, for receiving the first signal to output a second signal; and an alarm decision circuit coupled to the signal processing circuit, during a time range, when a number of the second signals meeting a trigger criteria is equal to a predetermined value, the alarm decision circuit outputting an alarm signal.

Systems and methods include an image capture component configured to capture infrared images of a scene, and a logic device configured to identify a target in the images, acquire temperature data associated with the target based on the images, evaluate the temperature data and determine a corresponding temperature classification, and process the identified target in accordance with the temperature classification. The logic device identifies a person and tracks the person across a subset of the images, identify a measurement location for the target in a subset of the images based on target feature points identified by a neural network, and measure a temperature of the location using corresponding values from one or more captured thermal images. The logic device is further configured calculate a core body temperature of the target using the temperature data to determine whether the target has a fever and calibrate using one or more black bodies.

The present disclosure relates to a method for resetting life diagnosis alarm of a contact of a contactor, including the following steps: Step A: detecting a reset signal by a microcontrol unit; Step B: when the microcontrol unit has detected the reset signal, checking the state of the diagnosis alarm through the microcontrol unit; and when the diagnosis alarm is in an active state, the microcontrol unit: Step C: controlling the indicator to give a first indication signal for confirming a reset operation of the diagnosis alarm; Step D: resetting life diagnosis data; Step E: controlling the opening and closing of the contact of the contactor through an actuator.

A client device is configured to communicate with an access point over a wireless network, exchanging data with the access point over a selected communication channel. The client device stores an identifier of the selected communication channel. After the wireless connection to the access point has ended, the client device initiates a process to reconnect to the access point over the selected communication channel using the stored identifier.

A device for adapting the volume of an audio signal in an audio system includes a control unit that determines the loudness of a first audio signal of a first entertainment source or the volume setting of a controller of the audio system, and adapts the volume setting of the controller of the audio system on the basis of the loudness of the first audio signal or the volume setting of the controller, or emits a signal in order to indicate to a user a change between the loudness of the first audio signal of the first entertainment source or the volume setting of the controller of the audio system and a respective specified threshold.

The invention provides a method for monitoring health state of blade root fastener, comprising the following steps: obtaining a sequence of acceleration signals representing the lateral vibration of the nacelle and a sequence of rotational speed signals representing the rotational speed of the rotor; analyzing the sequence of acceleration signals and the sequence of rotational speed signals to determine the amplitude of the nacelle at 2-time-frequncy of the rotational speed of the rotor; and determining the health state of the blade root fastener based on the amplitude. The invention also provides a system for monitoring the health state of the blade root fastener. Through the present invention, the health state of the blade root fastener can be determined with low cost and high precision, thereby improving the operation efficiency and operation safety of the wind turbine.

The invention provides a method for monitoring health state of blade root fastener, comprising the following steps: obtaining a sequence of acceleration signals representing the lateral vibration of the nacelle and a sequence of rotational speed signals representing the rotational speed of the rotor; analyzing the sequence of acceleration signals and the sequence of rotational speed signals to determine the amplitude of the nacelle at 2-time-frequncy of the rotational speed of the rotor; and determining the health state of the blade root fastener based on the amplitude. The invention also provides a system for monitoring the health state of the blade root fastener. Through the present invention, the health state of the blade root fastener can be determined with low cost and high precision, thereby improving the operation efficiency and operation safety of the wind turbine.

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for finding lost objects. In some implementations, a request for a location of an item is obtained. Current video data from one or more cameras is obtained. It is determined that the item is not shown in the current video data. Sensor data corresponding to historical video data is obtained. Events that likely occurred with the item and corresponding likelihoods for each of the events are determined. A likely location for the item is determined based on the likelihoods determined for the events. An indication of the likely location of the item is provided.

A method for facilitating remote jobsite monitoring is provided. The method includes receiving data from a sensor device; parsing the data to generate a data set that corresponds to the sensor device; determining a threshold violation by comparing the data set to a corresponding predetermined threshold value; generating an alert that includes information corresponding to the threshold violation; identifying an external device and a corresponding mobile communication protocol based on at least one from among a predetermined setting and the threshold violation; and transmitting, via the identified mobile communication protocol, the alert to the identified external device.

A microphone-speaker device includes a speaker, a microphone configured to capture sound and output an audio data signal and a housing configured to contain the microphone and the speaker. The device also includes an electronic circuit having audio electronics coupled to the speaker, an Ethernet interface configured to connect the electronic circuit for communication with a security system through an Ethernet connection, a power extractor for extracting power from the Ethernet connection for powering the electronic circuit and the microphone, and processing electronics configured to process the audio data signal from the microphone.