The sensor detect signal is used to determine whether a piezoelectric sensor is connected to the sensor interface circuit Similarly, the design of the transmitting hose is critical. Using MEMS microphones in the preferred embodiment is a critical part of the design.
Ground closers 52, depicted in FIG. From the primary seed tubethe seeds travel into a secondary manifoldwhere the flow of seeds is split or branched in several directions and directed into a plurality of secondary seed tubes The comparator 33 acts to compare the signal amplitude of the attenuated sensor signal with a reference voltage and to provide an output count pulse for each signal which the amplitude exceeds the fixed reference voltage.
From each secondary manifold, the seeds flow into secondary seed tubes, and eventually down into the furrow being made in the ground by the openers on the air seeder.
A directional arrow 84 appears in the isometric view of the blockage sensor cover 76 in FIG. The slave unit enclosure is uniquely designed to house the circuitry and to provide multiple connector ports for the sensor wire cable harnessing 66 FIG.
Each module is attached to a plurality of sensors for receiving signals from the sensors. This generally enables only detection of a total absence of seed flow or an inaccurate detection system or is generally inadequate because of the variation in sensor characteristics as well as differing flow characteristics in different tubes on the seeding equipment.
If a partial or full blockage develops in one or more of the particulate flow tubes, air flow and, therefore, particulate flow increases proportionately in the remaining tubes, further complicating the balancing problem. This signal is used in the sensor interface circuit to determine which sensors are attached to the slave.
As the seeds pass into the conduitthe rate of their flow is controlled by a metering system Acceptor 98 contains two fastener holesA and acceptor 98A contains two fastener holes B, C.
The slave unit 64 is housed in a special enclosure FIG. In the depiction of FIG. To adjust the system so that all sensors read hits requires that the threshold be set so that the weaker sensor is operating satisfactorily.
For the example air seeder in FIG. The analog switches are used by the blockage monitoring node to select which of the input streams from the MEMS microphones should be processed at a given time. In most cases the sensor provided detects these slow moving seeds and assumes that the tube is operating normally with the seeds flowing to the downstream end for discharge.
The blockage monitoring node also has a power supply circuitwhich is used to process and regulate the power coming into the blockage monitoring nodeand provide it as necessary at the proper voltage level for the functional blocks shown in FIG.If one or more of the acoustic sensors detects a sudden drop in sound level, the blockage monitoring node will determine that the corresponding seed tube has a partial or full blockage and will indicate an alarm condition (in at least one embodiment, the determination of whether there is an alarm condition may actually take place in.
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seed tube blockage, seed count, flame) Microwave (e.g. true ground speed RADAR) Radio frequency (RF) Compact RFID electronic safety sensor Radio-frequency.
However when a blockage occurs downstream of the sensor in the seed tube, it is possible that seeds will still be carried down the tube. In most cases the sensor provided detects these slow moving seeds and assumes that the tube is operating normally with the.
Nov 03, · A "full-run" air seeder blockage monitoring system is defined as one in which every connected secondary seed tube 48 in the system is fitted with an individual blockage sensor unit 56, such that blockage can be detected if it occurs in any of the primary seed tubes 40 or in any of the secondary seed tubes 48 which are connected to the system.
The Hy Rate Plus™ LED Seed Sensor is the sensor of choice for all seed types regardless of size, shape and seeding rate. From larger seeds such as corn to small seeds like canola, the Hy Rate Plus accurately counts seeding population during planting, providing confidence that your row units are working properly and seeds are being placed for.
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