Systems, methods, and devices are provided for monitoring precipitation. An example rain gauge device for use in such monitoring generally includes a first basin including at least one outlet for forming and releasing droplets of moisture, and at least two electrical contacts disposed proximate to the at least one outlet. A closed circuit is formed between the at least two electrical contacts when a droplet of moisture, released by the at least one outlet, contacts the at least two electrical contacts. The rain gauge device then also includes a processor communicatively coupled to the at least two electrical contacts. The processor is configured to determine presence of a moisture event based on the closed circuit formed by the droplet and the at least two electrical contacts and, in response to the determination, transmit an indication of the moisture event to a computing device.

The system comprises a rainfall monitoring module, a self-calibration and rainfall measurement module, a central processing module, a water level monitoring module, and a drainage module. The rainfall monitoring module is configured to monitor rainfall and send a rainfall signal to the central processing module. The self-calibration and rainfall measurement module is configured to transmit ultrasonic signals and receive calibration echo signals to compute the calibrated flight time, and transmit ultrasonic signals to the water surface in the bucket and receive the measured echo signal reflected by the water surface to obtain the measured flight time under the control of the central processing module. The central processing module is configured to receive the rainfall signal to start the water level monitoring module and the self-calibration and rainfall measurement module, which are used to calculate the rainfall value and output it in a fixed format.

The system comprises a rainfall monitoring module, a self-calibration and rainfall measurement module, a central processing module, a water level monitoring module, and a drainage module. The rainfall monitoring module is configured to monitor rainfall and send a rainfall signal to the central processing module. The self-calibration and rainfall measurement module is configured to transmit ultrasonic signals and receive calibration echo signals to compute the calibrated flight time, and transmit ultrasonic signals to the water surface in the bucket and receive the measured echo signal reflected by the water surface to obtain the measured flight time under the control of the central processing module. The central processing module is configured to receive the rainfall signal to start the water level monitoring module and the self-calibration and rainfall measurement module, which are used to calculate the rainfall value and output it in a fixed format.

A rain gauge for measurement of rain fall. The rain gauge includes: a measurement chamber having an inlet port at one end and a drainage port at the other end, the drainage port being closed by a valve and programmable to be opened at predefined events to release water collected in measurement chamber; a funnel or collector adapted to receive rain fall opens into the inlet port; and an ultrasonic transducer for transmitting and receiving acoustic signals into measurement chamber. The ultrasonic transducer is programmable to determine the water level in measurement chamber. An automatic weather station including the rain gauge is also provided.

A rain gauge for measurement of rain fall. The rain gauge includes: a measurement chamber having an inlet port at one end and a drainage port at the other end, the drainage port being closed by a valve and programmable to be opened at predefined events to release water collected in measurement chamber; a funnel or collector adapted to receive rain fall opens into the inlet port; and an ultrasonic transducer for transmitting and receiving acoustic signals into measurement chamber. The ultrasonic transducer is programmable to determine the water level in measurement chamber. An automatic weather station including the rain gauge is also provided.

A water detecting pressure-sensing device includes a metal housing including a cavity. A pressure sensor is disposed on a die and configured to generate a signal in response to a pressure variation. A protection medium at least partially fills the cavity and covers the die. One or more electrodes are disposed on the die and are used to detect a presence of a water droplet on the protection medium.

A droplet sensor includes an optical cover that forms part of a spheroid, a major axis of the spheroid being a vertical axis, a light emitting/receiving device disposed at a position offset from a first focal point of the spheroid along the major axis, and a reflector disposed in vicinity of a second focal point of the spheroid. The optical cover has an effective detection area between the light emitting/receiving device and the reflector. The effective detection area satisfies a total internal reflection condition at an interface with a gas, and does not satisfy the total internal reflection condition at an interface with a liquid. The reflector reflects, towards a light receiving surface of the light emitting/receiving device, light totally reflected by the effective detection area, or reflects, towards the effective detection area, light directly incident on the reflector from the light emitting/receiving device.

A droplet sensor includes an optical cover that forms part of a spheroid, a major axis of the spheroid being a vertical axis, a light emitting/receiving device disposed at a position offset from a first focal point of the spheroid along the major axis, and a reflector disposed in vicinity of a second focal point of the spheroid. The optical cover has an effective detection area between the light emitting/receiving device and the reflector. The effective detection area satisfies a total internal reflection condition at an interface with a gas, and does not satisfy the total internal reflection condition at an interface with a liquid. The reflector reflects, towards a light receiving surface of the light emitting/receiving device, light totally reflected by the effective detection area, or reflects, towards the effective detection area, light directly incident on the reflector from the light emitting/receiving device.

A delivery system for delivering a package to a delivery destination using a moving body, including a weather information acquiring unit that acquires weather information including information concerning weather at the delivery destination; and a judging unit that judges whether delivery of the package to the delivery destination by the moving body is possible, based on the weather information acquired by the weather information acquiring unit.

A delivery system for delivering a package to a delivery destination using a moving body, including a weather information acquiring unit that acquires weather information including information concerning weather at the delivery destination; and a judging unit that judges whether delivery of the package to the delivery destination by the moving body is possible, based on the weather information acquired by the weather information acquiring unit.