Patent Application
20140247338
The present invention relates to a camera system for imaging the inside of pipes, and, more specifically, to a nozzle-mounted camera for inspecting municipal pipes.
Most municipalities contain a vast network of storm and sewer pipes, often representing the oldest infrastructure in the community. Periodically, these pipes must be inspected for problems such as cracks, blockage, build-up, and root infiltration. To this end, it is common for a device such as a pipe crawler or push camera to be introduced into the pipe to perform the inspection. Although effective in obtaining detailed images, using a pipe crawler is inconvenient and requires a great deal of time to set up and operate even if no problem is discovered. Furthermore, the use of pipe crawlers is frequently limited by the size and configuration of pipes to be entered. In this regard, often the condition of the pipe (e.g., debris and fractures) prevents the use of inspection devices like crawlers.
The inefficiencies associated with routine inspections are exacerbated in situations where the pipes need to be cleaned since pipe inspection and cleaning are typically performed by different personnel, often at different times. In a typical cleaning operation, an inspection is performed initially to determine whether the pipes are blocked. Such an inspection tends to be excessive since blockage conditions can be determined usually without the precision required for assessing cracks and other pipe damage. If a blockage is detected, then cleaning personnel must be brought in to perform an invasive cleaning operation. Once the cleaning procedure is performed, a second inspection is typically required to ensure that the blockage has been removed. This second inspection requires the inspection personnel to return and perform yet another invasive inspection (which as mentioned above is excessive in the first instance) to confirm whether the blockage has been removed. If the cleaning was not sufficient, then the cleaning personnel must return to continue the cleaning operation, and the cleaning/inspection process is repeated yet again. Thus, in this cleaning process, an inconvenient and excessive inspection is repeated between each cleaning causing delays and driving up costs.
Therefore, there is a need for a more convenient approach to inspect and maintain underground pipes without the time and complexity associated with specialized inspection techniques inherent in the use of pipe crawlers or push cameras. The present invention fulfills this need among others.
The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. This summary is not an extensive overview of the invention. It is not intended to identify key/critical elements of the invention or to delineate the scope of the invention. Its sole purpose is to present some concepts of the invention in a simplified form as a prelude to the more detailed description that is presented later.
The present invention provides for a quick and convenient approach to ascertain the condition of the pipe before, during or after its cleaning. Specifically, the present invention relates to a camera that is adapted for connection to a conventional nozzle used for cleaning sewers. Such nozzles are well known. A typical nozzle has jets such that, when the nozzle is attached to a water hose and the hose is pressured, the water is expelled through the jets to propel the nozzle down a pipe, thus cleaning the pipe as the nozzle is propelled down the pipe. Applicant recognizes that these nozzles may be used to convey a camera down a pipe with very little adaptation of the nozzle or training of the crews that operate the nozzle. Rather, conventional nozzles may be used by typical cleaning crews to both clean and inspect the pipes.
The inspection may be performed by the crew before cleaning, during the cleaning process or after cleaning to ensure the cleaning job is complete. Once the images are obtained, an analysis may be performed to determine whether problems such as cracks, blockage, and root infiltration exist. The images obtained preferably are in a readily-transmitted form, such as digital video or still images of any know format. If no problem is detected, then the system can be moved quickly to another area to perform another inspection. This way, the time of setting up and operating a pipe crawler or similar device is not wasted on areas that are in acceptable condition. On the other hand, if a problem is detected, a cleaning procedure may be performed right then. For example, if a crack is detected, a more comprehensive inspection may be performed in which an invasive inspection device, such as a pipe crawler or push camera, is introduced in the pipe to obtain detailed images pursuant to formulating a plan to remedy the situation. Likewise, if the initial inspection detects that a pipe is clogged, it may be cleaned contemporaneously by introducing a cleaning nozzle or other invasive cleaning device into the pipe to remove the obstruction. Once the cleaning procedure is completed, the nozzle-mounted camera system may be used again to ensure that the cleaning is adequate. Thus, rather than awkwardly halting cleaning operations between inspections and involving different cleaning and inspection crews, an inspection may be performed quickly and easily on the spot by the cleaning crew.
Applicant also recognizes that simplifying the operation of the camera is preferred not only because cleaning crews tend to lack training for more-complex video inspection techniques, but also because the environment is particularly harsh in the pipe. Thus, a simple, reliable way of recording images of the pipe is generally preferred over more complex, sophisticated techniques. Accordingly, in one embodiment, the camera is self-contained, in which no remote communications, control, or power is required for it to operate. It is simply turned on, sent down the pipe to record images, and then retrieved to recover the recorded messages. Applicant has determined that such simplicity avoids problems inherent in cable and wireless communications and remote power supply.
Accordingly, one aspect of the invention is a camera for attaching to a nozzle for pipe inspection. In one embodiment, the camera comprises: (a) a water-proof housing having a transparent window on one end of the housing, the housing being configured for attachment to the nozzle; (b) an imaging device in the housing with a field of view through the window; (c) one or more lamps to illuminate at least a portion of the field of view; and (d) a memory device operatively connected to the imaging device. In one embodiment, the camera is self-contained with the power (e.g., battery) and control necessary to image and record the inside of a pipe. In this embodiment, the operating does not control the system once it is turned on and positioned in a pipe.
Another aspect of the invention is a nozzle-mounted camera system for inspecting pipes. In one embodiment, nozzle-mounted camera system comprises: (a) a nozzle having an adapter for attaching a hose and one or more jets; and (b) a camera operatively connected to the nozzle, the camera comprising at least: (i) a water-proof housing having a transparent window on one end of the housing, the housing being configured for attachment to the nozzle; (ii) an imaging device in the housing with a field of view through the window; (iii) one or more lamps to illuminate at least a portion of the field of view; and (iv) a memory device operatively connected to the imaging device. As mentioned above, in one embodiment, the camera is self-contained with the power (e.g., battery) and control necessary to image and record the inside of a pipe.
Yet another aspect of the invention is a method of using a nozzle mounted camera to inspect a pipe. In one embodiment, the method of imaging a pipe comprises the steps of: (a) attaching a hose to a nozzle, the nozzle having one or more jets and having a camera operatively connected thereto, the camera having memory for recording images; (b) activating the camera to record images in the memory; (c) after step (a), positioning the nozzle in a pipe; (d) causing a fluid to flow through the hose into the nozzle under pressure such that the fluid is expelled through the jets to propel the nozzle down the pipe; and (e) after the nozzle travels down a length of the pipe, obtaining recorded images from the memory.
Referring to
The nozzle-mounted camera system 100 is particularly well suited for inspecting the interior of pipes such as sewer and storm pipes 400 (see
Details of the product features and method steps are discussed in greater detail below.
Referring to
Although conventional nozzles may be used to practice the present invention, it should be understood that applicant anticipates nozzles being optimized for carrying camera systems. For example, such nozzles may be optimized to minimize lateral spray which may interfere with the imaging process. In this respect, the jets 103 can be configured to direct the spray of water axially and thus propel the nozzle more efficiently. Still other enhancements and optimizations of the nozzle 101 will be obvious to those of skill in the art in light of this disclosure.
Referring to
In one embodiment, in addition to being waterproof, the housing is also configured to be pressurized. Pressurizing the housing ensures that liquid and other debris does not enter the housing and compromise the internal components. The housing can be pressurized with any conveniently-obtained, non-flammable gas such as, for example, air or nitrogen. Generally, nitrogen is preferred. In one embodiment, the rear end 127 of the housing 121 as shown in
The housing also provides a transparent window 122 through which the imaging device records images of the interior of the pipe as the nozzle travels down the pipe. In one embodiment, the camera 120 also comprises lamps 125 to illuminate the field of view of the imaging device. Suitable lamps include, for example, LED, halogen and high intensity discharge lamps. Such lamps are well known and commercially available. Generally, LED lamps are preferred because of their low power consumption.
The camera 120 also comprises an imaging device within the housing 121. The imaging device may be any known, commercially-available imaging device. In one embodiment, the camera has a wide filed of view. In one particular embodiment, the viewing angle is about 130 degrees diagonal, with a VGA resolution of about 640×480 pixels. In one embodiment, the imaging device is configured to record in AVI-files format. It should be understood however that imaging device with varying viewing angles, resolutions and recording formats can be practiced with the invention. For example, the images recorded may be video images or still images or a combination of the two.
The camera 120 also comprises a memory device to record the images of the imaging device. The memory device can be any commercially-available, non-volatile memory storage system. Such systems are well known. In a specific embodiment, the memory device comprises electronic flash memory data storage device(s) such as those used in many electronic devices, including digital cameras, mobile phones, laptop computers, and video game consoles. At this time, secure digital (SD) drives have been used with acceptable results, although it is expected that memory devices will continue to evolve and that the invention may be practiced with later-developed memory devices. Generally, it is preferred that there be enough storage on the device to handle one or more inspections. Suitable memory sizes can be determined by one that is skilled in the art in light of this disclosure without undue experimentation. For example, in one embodiment, recording consumes about 4 gigabytes per hour. Accordingly, the memory device should be sized to accommodate the expected memory consumption. In one particular embodiment, the memory device comprises a 32 GB SDHC. Generally, it is preferred to have a solid state memory device as such devices tend to be more durable, although suitable rugged disk drives can also be used. Furthermore, although removable memory is considered in detail herein, it should be understood that the memory may be fixed and that the camera 120 may have a data interface to transfer data from the memory device to another device. This data transfer interference may be over a cable or it may be wireless. Such interfaces are well known and commercially available.
In one embodiment, the camera system 120 is powered by batteries contained within the housing 121. Such an approach is advantageous in that such batteries are well known and commercially available, and, allow the camera 121 to be a totally self-sufficient image recording unit. It should also be noted that the battery in this context is used broadly to refer to any traditional battery or fuel cell power approach. Although batteries are generally preferred to power the camera 120, it should be understood that other means of powering the camera 120 are within the scope of the claims. For example, in one embodiment, power is provided remotely and is connected to the camera 120 through a conventional power cord.
In one embodiment, the electrical interface to the camera 120 is provided in a portal 141. As shown in the embodiment of
In one embodiment, the camera 120 provides convenient access points to operate the device. For example, in one embodiment, the housing comprises a start/stop button 140 conveniently located on the top of the housing. The start/stop button can be configured in different ways. For example, in one embodiment, the button starts and stops the system with no other controls required, and, in another embodiment, the button 140 works in conjunction with an other switch (see, e.g., the main switch 509, see
In one embodiment, the camera 120 also comprises a light 180 (e.g., LED) to indicate the functional status of the camera. For example, the light 180 can be configured to flash at different frequencies, or display different colors, or stay on or off depending on different conditions. For example, in one embodiment, the light 180 can provide an indication of when the memory device is full, or missing, or otherwise not functioning properly. In this embodiment, the light may not flash or it may flash quickly if a problem with the memory is detected. Likewise, in another embodiment, the light 180 may flash in a different pattern or change color to indicate low battery status. Still other signaling by the light 180 will be obvious to those of skill in the art in light of this disclosure.
It is generally preferred although not necessary that the operation of the camera 120 be as simple and require little input from the user. In this respect, the device has just a few control features and simple on/off switches as described above. Thus, the user simply connects the camera to the nozzle 101, turns the camera 120 on, places the camera in a sewer or storm pipe through a manhole as shown in
More specifically, in one embodiment, the user charges the battery through the battery interface 508 until the battery is fully charged. Next, the operator checks to determine if the pressure indicator 502 is indicating that the pressure is sufficient within the housing. As mentioned above, in one embodiment, this would simply be a matter of observing whether the indicator 502 is sticking out. If the pressure indicator switch is not sticking out, then the housing must be pressurized until it does. Next, if not already done, the memory device 506 is inserted through the access port 507 in the portal 141. Once the memory device is installed through the access port, the cap 503 is screwed onto the protrusion 505 tightly. In one embodiment, the device is placed in stand-by mode by actuating the main switch 509 before screwing the cap on. In this embodiment, the main switch powers the imaging device, the lamps, and the memory device, but does not yet activate the imaging device to start recording images/video. Once the cap 503 is screwed in place, in one embodiment, the light 180 around the on/off switch 140 begins to flash. In one embodiment, the light 180 provides an indication of when the memory device is full, or missing, or otherwise not functioning properly. To start the recording process, the on/off switch 140 is depressed. At this point, the images from the imaging device are recorded by the memory device and the light 180 stays on. To stop the images from being recorded, the on/off switch 140 is simply pressed again. The memory device then can be retrieved from the portal 141 of the camera. In one embodiment, the memory card is ejected from the unit and the recorded images are reviewed on any SDHC-compatible device.
While this description is made with reference to exemplary embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope. In addition, many modifications may be made to adapt a particular situation or material to the teachings hereof without departing from the essential scope. Also, in the drawings and the description, there have been disclosed exemplary embodiments and, although specific terms may have been employed, they are unless otherwise stated used in a generic and descriptive sense only and not for purposes of limitation, the scope of the claims therefore not being so limited. Moreover, one skilled in the art will appreciate that certain steps of the methods discussed herein may be sequenced in alternative order or steps may be combined. Therefore, it is intended that the appended claims not be limited to the particular embodiment disclosed herein.
This application claims priority to U.S. Provisional Application No. 61/771,652, filed Mar. 1, 2013, hereby incorporated by reference in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| 61771652 | Mar 2013 | US |
