Systems and methods of the present disclosure relate to non-intrusive tracking or locating of objects in a conduit from a single location. A system comprises a vessel comprising a pressurized fluid, a valve positioned to control a flow of the pressurized fluid into the conduit to induce at least one pressure wave directed at the object, a pressure transducer in fluid communication with the conduit, the pressure transducer positioned to measure at least one pressure response in the conduit due to contact of the at least one pressure wave with the object, and a system controller operable to: receive pressure data from the pressure transducer, wherein the pressure data includes the at least one pressure response and determines a distance of the object in the conduit, relative to a reference point, based on the at least one pressure response.

Systems and methods of the present disclosure relate to non-intrusive tracking or locating of objects in a conduit from a single location. A system comprises a vessel comprising a pressurized fluid, a valve positioned to control a flow of the pressurized fluid into the conduit to induce at least one pressure wave directed at the object, a pressure transducer in fluid communication with the conduit, the pressure transducer positioned to measure at least one pressure response in the conduit due to contact of the at least one pressure wave with the object, and a system controller operable to: receive pressure data from the pressure transducer, wherein the pressure data includes the at least one pressure response and determines a distance of the object in the conduit, relative to a reference point, based on the at least one pressure response.

The invention provides a method of driving a vibrating sensor in which the drive signal is combined with an amplitude modulated high frequency carrier. The signal is demodulated at a position adjacent to the component to be driven. This method may be applied to reducing cross-talk between drive and pick-up wire pairs and also to passing both drive and pickup signals, and two drive signals, down the same wire pair.

Flow sensors are provided that can monitor flow conditions. The flow sensor includes a gauge that provides a first level of information about flow through the sensor, and an indicator associated with the gauge that can provided a second level of information about flow through the sensor. The indicator might be in the form of a dial that can rotate about the gauge and might include a locked position for monitoring flow and an unlocked position to rotate the dial about the gauge to reposition the dial. A twisted shaft with varying twist rate is provided to convert linear motion to rotational motion for the gauge.

In one aspect, a system for detecting ground engaging tool float for an agricultural implement may include an implement having a ground engaging tool pivotally coupled to a frame and a biasing element coupled between the frame and the ground engaging tool. The biasing element may be configured to bias the ground engaging tool to a predetermined ground engaging tool position relative to the frame. The system may also include a sensor configured to detect a parameter indicative of a current position of the ground engaging tool relative to the frame. Additionally, the system may include a controller configured to monitor the current position of the ground engaging tool based on measurement signals received from the sensor and identify a time period across which the ground engaging tool is displaced from the predetermined ground engaging tool position. The controller may be further configured to compare the identified time period to a threshold time period to determine when a ground engaging tool float event is occurring during operation of the implement.

In one aspect, a system for detecting ground engaging tool float for an agricultural implement may include an implement having a ground engaging tool pivotally coupled to a frame and a biasing element coupled between the frame and the ground engaging tool. The biasing element may be configured to bias the ground engaging tool to a predetermined ground engaging tool position relative to the frame. The system may also include a sensor configured to detect a parameter indicative of a current position of the ground engaging tool relative to the frame. Additionally, the system may include a controller configured to monitor the current position of the ground engaging tool based on measurement signals received from the sensor and identify a time period across which the ground engaging tool is displaced from the predetermined ground engaging tool position. The controller may be further configured to compare the identified time period to a threshold time period to determine when a ground engaging tool float event is occurring during operation of the implement.

The present invention discloses a pneumatic sensor, having an air intake and an air outlet. The pneumatic sensor includes a first triboelectric component, a shell, a second triboelectric component and a third triboelectric component, wherein the shell has a hollow structure in a preset shape to form an airflow channel, and the airflow channel is communicated with the air intake and the air outlet, thus allowing the airflow to enter the airflow channel from the air intake and flow out from the air outlet; the first triboelectric component is arranged in the airflow channel, and the second and the third triboelectric components are arranged at positions capable of contacting with the first triboelectric component; and the second and the third triboelectric components include electric signal output terminals of the pneumatic sensor.

The present invention discloses a pneumatic sensor, having an air intake and an air outlet. The pneumatic sensor includes a first triboelectric component, a shell, a second triboelectric component and a third triboelectric component, wherein the shell has a hollow structure in a preset shape to form an airflow channel, and the airflow channel is communicated with the air intake and the air outlet, thus allowing the airflow to enter the airflow channel from the air intake and flow out from the air outlet; the first triboelectric component is arranged in the airflow channel, and the second and the third triboelectric components are arranged at positions capable of contacting with the first triboelectric component; and the second and the third triboelectric components include electric signal output terminals of the pneumatic sensor.

A polishing device has a substrate stage which holds a substrate Wf, a processing head which processes a surface of the substrate Wf, an indentation detecting system which detects a position of an indentation in the substrate Wf, a movement mechanism which moves the processing head in a radial direction of the substrate stage, and a rotation mechanism which rotates the substrate stage, and the indentation detecting system has a fluid injection nozzle configured to inject a fluid to a circumferential edge portion of the substrate Wf when the substrate Wf is held on the substrate stage, a fluid measuring device which measures a physical quantity which is pressure or a flow rate of the fluid, and a position detector which detects the position of the indentation formed in the circumferential edge portion of the substrate Wf based on a change in physical quantity.

Systems and methods of the present disclosure relate to non-intrusive tracking or locating of objects in a conduit from a single location. A system comprises a vessel comprising a pressurized fluid, a valve positioned to control a flow of the pressurized fluid into the conduit to induce at least one pressure wave directed at the object, a pressure transducer in fluid communication with the conduit, the pressure transducer positioned to measure at least one pressure response in the conduit due to contact of the at least one pressure wave with the object, and a system controller operable to: receive pressure data from the pressure transducer, wherein the pressure data includes the at least one pressure response and determines a distance of the object in the conduit, relative to a reference point, based on the at least one pressure response.