摘要:
A seed delivery apparatus has a moving member that captures and entraps the seed from the seed meter and physically moves the seed from the meter to the lower outlet opening. In so doing, the seed engages and travels along an interior surface of the seed delivery apparatus. A seed sensor is mounted on the housing wall such that the seed passes directly in front of the sensor. The sensor has both the light emitting devices and the photo-sensitive elements on the same wall of the delivery apparatus, or on two opposed walls. The moving member prevents ambient light, dust and dirt from entering the housing and impacting the sensor output signal.
摘要:
A pressure sensing system for a seeding machine such as a planter to measure the down force on a planter row unit uses a wireless pressure sensor embedded in a load carrying wheel of the row unit. In a preferred embodiment, the pressure sensor is a passive piezoelectric pressure sensor that is a transmitter only, transmitting both pressure and RFID the information that identifies the particular sensor. Multiple sensors may be employed in each wheel and sensors may be employed in more than one wheel of the row unit, such as the gauge wheels on opposite sides of the trench opening disks. The sensors may be made of a PVDF, a known piezoelectric material. A wireless receiver is located on the planter frame or could be located elsewhere to receive the signals from the pressure sensor. A controller determines from the signal, any change in down force and commands the change to a down force generator on the row unit.
摘要:
A seed delivery apparatus has a moving member that captures and entraps the seed from the seed meter and physically moves the seed from the meter to the lower outlet opening. In so doing, the seed engages and travels along an interior surface of the seed delivery apparatus. A seed sensor is mounted on the housing wall such that the seed passes directly in front of the sensor. The sensor has both the light emitting devices and the photo-sensitive elements on the same wall of the delivery apparatus, or on two opposed walls. The moving member prevents ambient light, dust and dirt from entering the housing and impacting the sensor output signal.
摘要:
An imaging system is provided. In one embodiment, an imaging system includes a radiation source and a digital detector. The imaging system may also include first and second structures, each configured to receive the digital detector. Further, the imaging system may include system control circuitry configured to control exposure of the digital detector by the radiation source and to acquire image data from the digital detector. Additionally, the digital detector may be configured to communicate its location to the system control circuitry based on receipt of the digital detector by the first or second receiving structures. Additional systems, methods, and devices are also disclosed.
摘要:
A quartz sensor method and system are disclosed in which a plurality of SAW sensing resonators can be mechanically simulated for implementation upon a quartz wafer substrate. The quartz wafer substrate can thereafter be appropriately etched to produce a quartz diaphragm from the quartz wafer substrate. A plurality of SAW sensing resonators (e.g., pressure, reference and/or temperature SAW resonators) can then be located upon the quartz wafer substrate, which is based upon the previously mechanically simulated for implementation upon the substrate to thereby produce a quartz sensor package from the quartz wafer substrate.
摘要:
A surface wave device can be configured to include an interdigital transducer and an acoustic coating formed upon a piezoelectric substrate, wherein the interdigital transducer is selected to introduce negligible electrical coupling to surface waves thereof. Additionally, an antenna can be integrated with the surface wave device, wherein the antenna receives one or mores signals, which excite the acoustic wave device to produce multiple modes frequency outputs in which temperature and pressure effect changes are separated from one another for analysis thereof.
摘要:
An imaging system is provided. In one embodiment, an imaging system includes a radiation source and a digital detector. The imaging system may also include first and second structures, each configured to receive the digital detector. Further, the imaging system may include system control circuitry configured to control exposure of the digital detector by the radiation source and to acquire image data from the digital detector. Additionally, the digital detector may be configured to communicate its location to the system control circuitry based on receipt of the digital detector by the first or second receiving structures. Additional systems, methods, and devices are also disclosed.
摘要:
A seed sensor system determines the position of the seed relative to the seed tube as the seed passes the sensor. The position of the seed as well as the speed of the planter and the position of the seed tube above the planting furrow are used to calculate trajectory of the seed into the furrow from which the seed spacing is predicated. By sensing the seed in both X and Y directions in the seed tube, the sensor is better able to determine multiple seeds as well providing more precision to the seed population.
摘要:
An x-ray detector panel support is disclosed that is formed with radiation absorbing material to reduce the reflection of x-rays off anything behind the scintillator, which may include the geometry of the panel support, the electronics, and the back cover of the x-ray detector. The absorbing material may take the form of a discrete layer secured to or otherwise disposed within the panel support. The radiation absorbing material may also be mixed with the base materials used to fabricate the panel support. As such, when the panel support is formed, it includes radiation absorbing components. The radiation absorbing material may include lead, barium sulfate, tungsten, as well as other materials. The panel support is constructed to inhibit the detection of backscattered x-rays without significantly increasing the size or weigh of the x-ray detector. The panel support is applicable with stationary or fixed as well as portable x-ray detectors.
摘要:
A self-testing and self-calibrating detector utilizing an internally produced reference gas. A detector that is sensitive to a target analyte as well as a reference gas can be utilized. A gas releasing material, such as a heated metal hydride, releases the reference gas. The partial pressure of the reference gas is known as a temperature dependent physical property of the gas releasing material. During calibration, the material can be heated to release reference gas and a calibration measurement of the gas' partial pressure can be made and compared to an expected value. The comparison can then be utilized to calibrate the detector.