A method is used to identify impending or previously occurring condensation on/in electric motors, in particular on/in electric motors as a component of fans or fan groups. It includes the following method steps: Determining component temperatures, preferably surface temperatures on the electronics, on/in the motor, on/in the fan, or on/in fan groups; Determining the dew point temperature or individual dew point temperatures on the electronics, in/on the motor, fan, or on/in fan groups; Comparing the respective component temperature with the respective dew point temperature and concluding a formation of condensation has already taken place or is imminent when the component temperature approaches the dew point temperature or when the dew point temperature is undershot. A further method serves to prevent the formation of condensate and/or to eliminate/remove condensate on/in electric motors, in particular on/in electric motors as a component of fans or fan groups. It includes the following method steps: Detecting an impending and/or previously occurring formation of condensate on or in the motor; and Initiating measures to prevent the formation of condensate and/or to eliminate/remove the condensate by means of passive or active measures.

A method is used to identify impending or previously occurring condensation on/in electric motors, in particular on/in electric motors as a component of fans or fan groups. It includes the following method steps: Determining component temperatures, preferably surface temperatures on the electronics, on/in the motor, on/in the fan, or on/in fan groups; Determining the dew point temperature or individual dew point temperatures on the electronics, in/on the motor, fan, or on/in fan groups; Comparing the respective component temperature with the respective dew point temperature and concluding a formation of condensation has already taken place or is imminent when the component temperature approaches the dew point temperature or when the dew point temperature is undershot. A further method serves to prevent the formation of condensate and/or to eliminate/remove condensate on/in electric motors, in particular on/in electric motors as a component of fans or fan groups. It includes the following method steps: Detecting an impending and/or previously occurring formation of condensate on or in the motor; and Initiating measures to prevent the formation of condensate and/or to eliminate/remove the condensate by means of passive or active measures.

The crop condition monitoring system according to an embodiment of the present disclosure includes a first capacitive moisture condition sensor detects a voltage according to a water condition, a second capacitive moisture condition sensor detects a voltage according to a water condition, a non-contact surface temperature sensor configured to detect a surface temperature of the first capacitive moisture condition sensor and generate a first surface temperature, a contact surface temperature sensor configured to detect a surface temperature of the second capacitive moisture condition sensor and generate a second surface temperature, the contact surface temperature sensor formed on the second capacitive moisture condition sensor, a temperature and humidity sensor configured to detect a dew point, and a crop condition monitoring server configured to predict the occurrence of dew and frost using the voltage according to the water condition received from the first capacitive moisture condition sensor, the voltage according to the water condition received from the second capacitive moisture condition sensor, the first surface temperature, the second surface temperature, and the dew point received from the temperature and humidity sensor.

The crop condition monitoring system according to an embodiment of the present disclosure includes a first capacitive moisture condition sensor detects a voltage according to a water condition, a second capacitive moisture condition sensor detects a voltage according to a water condition, a non-contact surface temperature sensor configured to detect a surface temperature of the first capacitive moisture condition sensor and generate a first surface temperature, a contact surface temperature sensor configured to detect a surface temperature of the second capacitive moisture condition sensor and generate a second surface temperature, the contact surface temperature sensor formed on the second capacitive moisture condition sensor, a temperature and humidity sensor configured to detect a dew point, and a crop condition monitoring server configured to predict the occurrence of dew and frost using the voltage according to the water condition received from the first capacitive moisture condition sensor, the voltage according to the water condition received from the second capacitive moisture condition sensor, the first surface temperature, the second surface temperature, and the dew point received from the temperature and humidity sensor.

Relative humidity or dew point temperature depending on changes in barometric pressure is measured without using any barometric pressure sensor. A humidity measuring device includes an elevation obtaining unit configured to obtain elevation of a humidity measurement point, a barometric pressure calculating unit configured to calculate barometric pressure at the humidity measurement point from a calculation formula into which a value of the elevation obtained by the elevation obtaining unit is input, and a humidity correcting unit configured to correct humidity on a basis of a barometric pressure value calculated by the barometric pressure calculating unit.

Relative humidity or dew point temperature depending on changes in barometric pressure is measured without using any barometric pressure sensor. A humidity measuring device includes an elevation obtaining unit configured to obtain elevation of a humidity measurement point, a barometric pressure calculating unit configured to calculate barometric pressure at the humidity measurement point from a calculation formula into which a value of the elevation obtained by the elevation obtaining unit is input, and a humidity correcting unit configured to correct humidity on a basis of a barometric pressure value calculated by the barometric pressure calculating unit.

A head-mounted device includes: an outer shell; a first flow channel that is a gap between a head of a wearer and the outer shell; a second flow channel provided in the outer shell and joining the first flow channel; a fan configured to blow air from one of the first flow channel and the second flow channel to the other of the first flow channel and the second flow channel; a first humidity sensor configured to measure an absolute humidity of intake air entering one of the first flow channel and the second flow channel; and a second humidity sensor configured to measure an absolute humidity of exhaust air exiting from the other of the first flow channel and the second flow channel.

A head-mounted device includes: an outer shell; a first flow channel that is a gap between a head of a wearer and the outer shell; a second flow channel provided in the outer shell and joining the first flow channel; a fan configured to blow air from one of the first flow channel and the second flow channel to the other of the first flow channel and the second flow channel; a first humidity sensor configured to measure an absolute humidity of intake air entering one of the first flow channel and the second flow channel; and a second humidity sensor configured to measure an absolute humidity of exhaust air exiting from the other of the first flow channel and the second flow channel.

A container (300) adapted to store a quantity of metal powder (101, 301), the container (300) comprising a container body having an opening and a sensing device (111, 121) for sensing the temperature of the powder (101, 301) and/or the humidity level inside the container (300), wherein a first reading received from the sensing device (111, 121) is compared to a second reading received from a second sensing device configured to sense the temperature and/or humidity level of an environment outside of the container, and based on the first reading and the second reading, a user is provided within an indication about whether the container can be opened.

A container (300) adapted to store a quantity of metal powder (101, 301), the container (300) comprising a container body having an opening and a sensing device (111, 121) for sensing the temperature of the powder (101, 301) and/or the humidity level inside the container (300), wherein a first reading received from the sensing device (111, 121) is compared to a second reading received from a second sensing device configured to sense the temperature and/or humidity level of an environment outside of the container, and based on the first reading and the second reading, a user is provided within an indication about whether the container can be opened.