Devices, systems and methods for leak detection are provided herein. Also provided are devices, systems and methods for monitoring and/or measuring fluid usage. In some aspects, a system comprising a sensor, a processing system, and a platform are provided. In some aspects, the sensor may be coupled to a spinning device. The sensor can be configured to detect fluid data, which can comprise, for example, displacement data of liquid and/or movement data associated with the liquid in a container and/or flow data associated with a flow of fluid in a conduit. The processing system can be coupled with the sensor and configured to communicate the fluid data. The platform can comprise an application communicatively coupled to one or more databases storing evaluation data (e.g., known pattern data) and configured to receive the fluid data and determine if there is a leak.

Devices, systems and methods for leak detection are provided herein. Also provided are devices, systems and methods for monitoring and/or measuring fluid usage. In some aspects, a system comprising a sensor, a processing system, and a platform are provided. In some aspects, the sensor may be coupled to a spinning device. The sensor can be configured to detect fluid data, which can comprise, for example, displacement data of liquid and/or movement data associated with the liquid in a container and/or flow data associated with a flow of fluid in a conduit. The processing system can be coupled with the sensor and configured to communicate the fluid data. The platform can comprise an application communicatively coupled to one or more databases storing evaluation data (e.g., known pattern data) and configured to receive the fluid data and determine if there is a leak.

Methods for characterizing fluids from a patient. A time series of images of a conduit are received, and a conduit image region in the images is identified. A flow type of the fluids passing through the conduit may be classified as one of air, laminar liquid, and turbulent liquid by evaluating an air-liquid boundary of the fluid. A volumetric flow rate of the fluids in the conduit is estimated. The volumetric flow rate may be based on the classified flow type. A concentration of a blood component of the fluids passing through the conduit may be estimated based on the images. A proportion of the fluid that is blood may also be determined, and a volume of blood that has passed through the conduit within a predetermined period of time may be estimated based on the estimated total volumetric flow rate and the determined proportion.

It is possible to improve a measurement accuracy of a liquid flow volume, thereby improving reproducibility of a measured value. Provided is a flow volume measuring device including a light source which emits light to a measuring-target region; a light receiving element which receives light scattered at the measuring-target region from the light emitted from the light source; a contact member having translucency with respect to a wavelength of the emitted light and a wavelength of the scattered light, the contact member including a surface which faces the measuring-target region and with which the measuring-target region is contactable over the entire surface; and a flow volume measuring unit which measures a flow volume of liquid flowing through the measuring-target region based upon the scattered light.

Systems and methods for sensing an amount of a liquid in a container are provided. A conduit is provided that has a length positioned relative to a portion of the container where a level of the liquid in the container changes when liquid is added to the container or liquid is removed from the container. The conduit is in fluid communication with the container to therefore allow an amount of the liquid to enter the conduit that is proportional to the amount of the liquid in the container. An outlet is provided along with a valve. The valve is in fluid communication with the conduit and the outlet, where the valve is selectable to allow the amount of liquid in the conduit to pass to the outlet, the amount of liquid passing to the outlet proportional to the amount of liquid in the container.

Methods, systems and computer program products for determining an accurate flow rate based on limited observations are provided. Aspects include receiving a limited sample of flow rate data associated with a test site of a test river. Aspects also include determining topographical characteristics of the test site. Aspects also include determining a plurality of similar tested sites and generating a test site rating curve based on a combination of the limited sample of flow rate data and sufficient flow rate data associated with one or more of the plurality of similar tested sites. Aspects also include obtaining a stage reading associated with the test site from a sensor disposed at the test site. Aspects also include determining a flow rate of the test site based on the stage reading and the test site rating curve.

Methods and systems for characterizing fluids from a patient are disclosed. The method includes receiving a time series of images of a conduit receiving fluids from the patient, identifying a conduit image region in each of the images, classifying a flow type through the conduit based on an evaluation of the conduit image region in the time series of images, and estimating at least one of a volume of fluids and a quantity of a blood component that has passed through the conduit within a predetermined period of time, based at least in part on the classification of the flow type.

Methods and systems for characterizing fluids from a patient are disclosed. The method includes receiving a time series of images of a conduit receiving fluids from the patient, identifying a conduit image region in each of the images, classifying a flow type through the conduit based on an evaluation of the conduit image region in the time series of images, and estimating at least one of a volume of fluids and a quantity of a blood component that has passed through the conduit within a predetermined period of time, based at least in part on the classification of the flow type.

A method of measuring a flow rate of a fluid flowing along a path, the method comprising: transmitting successive pairs of periodic signals through the fluid, the respective signals of each pair being transmitted in opposite directions along, and from opposite ends of, the path; determining a difference in propagation times of each signal of each pair along the path; and determining a flow rate of fluid along the path based on the difference in propagation times of the signals of each pair along the path; wherein a phase of each signal is altered with respect to a phase of at least one other signal transmitted along the path.

Battery-operated field devices and methods for operating battery-operated field devices, in particular field devices for fill level measurement, for determining a limit level, for detecting a topology of a filling material surface, or for displaying the measured values of these devices, is provided. A battery-operated field device, which may be a fill level sensor device, a flow sensor device, a pressure sensor device, or a display device, includes an energy storage means, a time management unit connected to the energy storage means via a first line, and a radio unit connected to the energy storage means via a switch, the radio unit being configured to transmit time information about a next measurement via a first interface to the time management unit and/or to receive the time information from the radio unit, when the switch is activated.