Controlled rain and fog testing apparatus

Patent metadata

Field	Value
Publication number	US-9739712-B2
Application number	US-201615395424-A
Country	US
Kind code	B2
Filing date	Dec 30, 2016
Priority date	Mar 26, 2014
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

A rain and fog testing apparatus, comprising a fluid channel that runs between a first fluid shutoff coupler and a second fluid shutoff coupler and has at least one dispersion head fluidly coupled to the fluid channel. A liquid pump can be fluidly coupled to the fluid channel at an output end. A liquid heater may also be fluidly coupled to the system along with a controller that provides electrical control of the first fluid shutoff coupler, the second fluid shutoff coupler, the dispersion head, the liquid pump, and the heater. Further, the second fluid shutoff coupler is capable of fluidly coupling a first fluid channel to a plurality of fluid channels and the controller can adjust the orientation of the first fluid shutoff coupler, the second fluid shutoff coupler, the dispersion head, the liquid pump, and the liquid heater to create a simulation of a plurality of rain or fog events.

First claim

The invention claimed is:

1. A rain and fog testing apparatus, comprising:
a first and second fluid shutoff coupler;
a plurality of dispersion heads, wherein each of said plurality of dispersion heads comprise a valve configured to control output of the valve's respective dispersion head;
a fluid channel coupled with and disposed between said first fluid shutoff coupler and said second fluid shutoff coupler, said fluid channel is fluidly coupled with said plurality of dispersion heads, wherein said plurality of dispersion heads are configured to selectively produce a spray pattern in a pattern such that said spray pattern does not result in a gap in the spray pattern over a predetermined volume of area comprising a test area, wherein said plurality of dispersion heads are further configured to generate overlapping spray pattern portions in the spray pattern over the test area;
a liquid pump fluidly coupled to the fluid channel through one of said first or second fluid shutoff couplers;
a liquid heater configured to selectively heat liquid supplied to said plurality of dispersion heads; and
a controller that provides electrical control of the first fluid shutoff coupler, the second fluid shutoff coupler, the plurality of dispersion heads, the liquid pump, and the heater;
wherein the second fluid shutoff coupler is configured to fluidly couple said fluid channel to a plurality of additional fluid channels;
wherein the controller adjusts orientation of output from the dispersion heads by adjusting each said valve as well as operating the first fluid shutoff coupler, the second fluid shutoff coupler, the plurality of dispersion heads, the liquid pump, and the liquid heater to create a rain or fog output approximating a spray pattern simulation of one of a plurality of rain or fog events over said test area.

2. The rain and fog apparatus of claim 1 , further comprising:
a first buoyancy device coupled to the fluid channel;
a first air shutoff coupler located at a first end of the first buoyancy device and fluidly coupled to an air pump; and
a second air shutoff coupler located at a second end of the first buoyancy device;
wherein the first air shutoff coupler, the second air shutoff coupler, and the air pump are controlled by the controller to open both the first air shutoff coupler and the second air shutoff coupler and engage the air pump at a user's command to fill the first buoyancy device with air;
wherein the controller opens the first air shutoff coupler and the second air shutoff coupler to allow the first buoyancy device to substantially fill with a surrounding liquid and allow the buoyancy device to become submerged within the surrounding liquid.

3. A method of controlling a rain or fog testing apparatus and corresponding device under test, comprising:
placing a rain or fog testing apparatus on a body of liquid, wherein said rain or fog testing apparatus comprises:
a first and second fluid shutoff coupler;
a plurality of dispersion heads, wherein each said plurality of dispersion heads comprise a valve configured to control output of the valve's respective said dispersion head;
a fluid channel coupled with and disposed between said first fluid shutoff coupler and said second fluid shutoff coupler, said fluid channel is fluidly coupled with said plurality of dispersion heads, wherein each of said dispersion heads are configured to selectively produce a spray pattern from the liquid in a pattern such that said spray pattern does not result in a gap in the spray pattern over a predetermined volume of area comprising a test area, said plurality of dispersion heads are further configured to generate overlapping spray pattern portions in the spray pattern over the test area;
a liquid pump fluidly coupled to the fluid channel through one of said first or second fluid shutoff couplers configured to pump said liquid into said fluid channel;
a liquid heater configured to selectively heat said liquid supplied to said dispersion heads; and
a controller that provides electrical control of the first fluid shutoff coupler, the second fluid shutoff coupler, the plurality of dispersion heads, the liquid pump, and the liquid heater;
wherein the second fluid shutoff coupler is configured to fluidly couple said fluid channel to a plurality of additional fluid channels;
wherein the controller adjusts orientation of output from the dispersion heads by adjusting each said valve as well as operating the first fluid shutoff coupler, the second fluid shutoff coupler, the plurality of dispersion heads, the liquid pump, and the liquid heater to create a rain or fog output approximating a spray pattern simulation of one of a plurality of rain or fog events over said test area;
placing a transmitter at one end of the rain or fog testing apparatus, the transmitter configured and oriented to transmit a signal through a rain or fog event generated by the rain or fog testing apparatus;
placing a receiver at a second end of the rain or fog testing apparatus, the receiver configured and oriented to receive the signal transmitted through the rain or fog event;
receiving user inputs into the controller, where the user inputs determine a type of said rain or fog event and when to transmit and receive the signal;
implementing the rain or fog event determined by the user inputs by operating said rain or fog testing apparatus to create a corresponding said rain or fog event;
initiating the transmitter to send the signal through the rain or fog event and receiving the signal with the receiver; and
recording the signal sent by the transmitter and received by the receiver during the rain or fog event.

4. A method as in claim 3 , wherein said transmitter comprises an optical signal transmitter.

5. A method as in claim 4 , further comprising:
providing and coupling a buoyancy system with said fluid channel, said buoyancy system comprising
an air pump;
a first and second buoyancy device coupled to the fluid channel;
a first air shutoff coupler located at a first end of the first buoyancy device and fluidly coupled to the air pump; and
a second air shutoff coupler located at a second end of the first buoyancy device;
wherein the first air shutoff coupler, the second air shutoff coupler, and the air pump are controlled by the controller to open both the first air shutoff coupler and the second air shutoff coupler and engage the air pump based on a user's control input or command to fill the first buoyancy device with air and selectively displace said liquid in said first buoyancy device so as to pump less or more air into said first buoyancy device than is within said second buoyancy device;
wherein the controller opens the first air shutoff coupler and the second air shutoff coupler to allow the first buoyancy device to substantially fill with a surrounding liquid and allow a portion or all of the first or the second buoyancy devices to become submerged within the surrounding liquid and thereby partially or completely submerge portions or all of said rain or fog testing apparatus underneath said body of liquid.

6. A rain and/or fog condition generating system, comprising:
a first and second fluid shutoff coupler;
a plurality of dispersion heads, wherein each said dispersion head comprises a valve configured to control output of the valve's respective said dispersion head;
a fluid channel coupled with and disposed between said first fluid shutoff coupler and said second fluid shutoff coupler, said fluid channel is fluidly coupled with said plurality of dispersion heads, wherein each of said dispersion heads are configured to selectively produce a spray pattern in a pattern such that said spray pattern does not result in a gap in the spray pattern over a predetermined volume of area comprising a tes

Assignees

• Us Navy

Inventors

• Hamilton John S

Classifications

• G01W1/00

  Meteorology · CPC title

• A01G15/00

  Devices or methods for influencing weather conditions · CPC title

• G01N21/538

  for determining atmospheric attenuation and visibility · CPC title

• G01J2001/4247

  for testing lamps or other light sources · CPC title

• G01N21/534 Primary

  by measuring transmission alone, i.e. determining opacity · CPC title