公开(公告)号：USD310339S

公开(公告)日：1990-09-04

申请号：US179140

申请日：1988-04-08

Applicant: S. David Tofte ,  Jeffry M. Irish

Designer： S. David Tofte ,  Jeffry M. Irish

公开(公告)号：US5574657A

公开(公告)日：1996-11-12

申请号：US193387

申请日：1994-02-08

Applicant: S. David Tofte ,  Steven W. Vogel

Inventor： S. David Tofte ,  Steven W. Vogel

IPC: A01C23/00 ,  A01C23/02 ,  A01M7/00 ,  G05D7/06 ,  G01F1/684

CPC classification number: G05D7/0623 ,  A01C23/007 ,  A01C23/024 ,  A01M7/0089 ,  A01M7/0092

Abstract: An electronic rate meter controller is provided for controlling the dispensing of meterable material by an applicator apparatus, typically in the agricultural area. The rate meter controller retrofits a manually-controllable rate meter within the applicator apparatus that controls the rate of material flow through the applicator by adjustment to a primary control member of the rate meter, such as a rotary calibration dial. The rate meter controller allows for automatic electronic control and adjustment to the rate meter by the primary control member, based on user inputs and certain sensor inputs. Typical sensor inputs include speed of the applicator apparatus as it is being moved while dispensing the metered material, and ambient air temperature which affects the applicator system pressure for certain materials such as anhydrous ammonia. The rate meter controller also allows for manual electronic remote control of the rate meter, such as from a cab of a vehicle moving the applicator apparatus. The rate meter controller can be utilized as an independent system or as a subsystem of an integrated system controlling a plurality of control devices. The rate meter controller can accommodate one or a plurality of rate meters within an applicator apparatus.

Abstract translation: 提供电子速率计控制器，用于控制通常在农业区域中的施用装置分配可测量材料。 速率计控制器改变了施用装置内的可手动控制的速率计，其通过调整速率计的主要控制构件（例如旋转校准盘）来控制通过涂抹器的材料流速。 速率计控制器允许基于用户输入和某些传感器输入，通过主控制器对速率计进行自动电子控制和调整。 典型的传感器输入包括施加器装置在分配计量材料时的移动速度，以及影响施用器系统对某些材料如无水氨的压力的环境空气温度。 速率计控制器还允许对速率计的手动电子遥控器，例如从移动施加器装置的车辆的驾驶室。 速率计控制器可以用作独立系统或者作为控制多个控制装置的集成系统的子系统。 速率计控制器可以容纳一个或多个速率计在施用装置内。

公开(公告)号：US5520333A

公开(公告)日：1996-05-28

申请号：US275584

申请日：1994-07-15

Applicant: S. David Tofte

Inventor： S. David Tofte

IPC: A01B79/00 ,  A01M7/00 ,  B05B9/06 ,  B05B12/08 ,  B05B7/26

CPC classification number: B05B9/06 ,  A01B79/005 ,  A01M7/0089 ,  B05B12/085 ,  Y10T137/86734 ,  Y10T137/87298 ,  Y10T137/87314

Abstract: Method and apparatus for dispensing a liquid agricultural agent at a desired rate. A source of the liquid is pressurized and passed in parallel though at least one regulating capillary tube of such diameter and length as to regulate the rate of dispensing of the liquid at the desired rate. A pressure of the liquid is sensed and controlled for the purpose of adjusting the above-mentioned flow rate. A flow rate of the liquid is sensed and used with the sensed pressure to detect and alert a user of possible problems in the system, such as clogging of a dispensing outlet. A ground speed of the farm tractor which is transporting the system can he sensed in order to calculate the appropriate flow rate. A geographical location a farm machine in order to facilitate "prescription farming". The liquid may be injected and mixed with a carrier, and the mixing can be done in close proximity to an outlet orifice. The pressurized liquid can be fed back to the source of the liquid to agitate the liquid there to prevent settling or stratification.

Abstract translation: 用于以期望的速率分配液体农药的方法和装置。 液体源被加压并且通过至少一个这样直径和长度的调节毛细管并行通过，以调节以所需速率分配液体的速率。 检测和控制液体的压力以调节上述流速。 液体的流速被感测并与检测到的压力一起使用以检测和警告使用者系统中的可能的问题，例如分配出口的堵塞。 他可以感测到运输系统的农用拖拉机的地面速度，以便计算适当的流量。 一个地理位置农场机器，以方便“处方农业”。 可以将液体注入并与载体混合，并且可以在靠近出口孔的情况下进行混合。 加压液体可以反馈到液体源，以搅拌其中的液体以防止沉降或分层。

公开(公告)号：US5475614A

公开(公告)日：1995-12-12

申请号：US180687

申请日：1994-01-13

Applicant: S. David Tofte ,  Steven W. Vogel

Inventor： S. David Tofte ,  Steven W. Vogel

IPC: A01M7/00 ,  G05D7/06 ,  G06F17/00

CPC classification number: A01M7/0089 ,  G05D7/0635

Abstract: A fluid delivery control system is provided for controlling a fluid delivery system to deliver a fluid under pressure at a target flow rate. In a hybrid mode, the preferred fluid delivery control system is responsive to signals from a pressure sensor and a flowmeter. Primary feedback control is provided using the sensed pressure from the pressure sensor, and the sensed flow rate from the flowmeter is utilized to provide compensation for the pressure responsive feedback control and to provide accurate measurements of flow rate and total flow for the fluid delivery system. The preferred fluid delivery control system is also capable of operating in flowmeter and pressure modes which are only responsive to signals from a flowmeter and a pressure sensor, respectively. In the preferred embodiment, the fluid delivery control system is utilized in a mobile sprayer system for applying an agent over a surface. A constant application rate of agent over the surface is maintained by varying the delivery rate of the fluid delivery system with the speed of the sprayer system.

Abstract translation: 提供了一种流体输送控制系统，用于控制流体输送系统以目标流速在压力下输送流体。 在混合模式中，优选的流体输送控制系统响应于来自压力传感器和流量计的信号。 使用来自压力传感器的感测到的压力提供初级反馈控制，并且利用来自流量计的感测流量来为压力响应反馈控制提供补偿，并且为流体输送系统提供流量和总流量的精确测量。 优选的流体输送控制系统还能够以仅分别来自流量计和压力传感器的信号的流量计和压力模式操作。 在优选实施例中，流体输送控制系统用于移动喷雾器系统中，用于在表面上施加试剂。 通过以喷雾器系统的速度改变流体输送系统的输送速率来维持表面上的试剂的恒定施用率。