Leak Detection Amplifier Works As Microphone

Leak Detection Amplifier Works As Microphone
The 2253P USB device from Sensoray

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The 2253P USB device from Sensoray combines the functions of a 2253 A/V codec video capture and compression device, incremental encoder interface, GPS receiver and text overlay in one unit. It can be used with any kind of inspection system that has a camera with composite video output. Operating power is supplied by a single USB port. 

“This unique combination allows the operator to capture and display live video from the crawler vehicle, archive the compressed video, determine the exact position of the vehicle and overlay position information over the video in real time,” says Alexander Khvilivitzky, director of engineering-vision systems at Sensoray. “Having one unit instead of four increases reliability and reduces downtime.”

The 2253P (5.14 by 3.28 by 1.14 inches) is specifically designed for pipeline inspection applications. With an operating temperature range of 32 to 158 degrees F, the device captures composite video from the remote camera on a crawler or other deployment device and displays it on a monitor at the base station for analysis. H.264 compression is used for encoding archived video, while a simultaneous low-latency uncompressed stream is used for real-time preview. 

Each digital multifunction port can operate as an incremental quadrature encoder interface or as dual general purpose digital inputs (GPIO). Data from encoders, GPS and GPIO is sent to the host over USB. GPS data identifies the pipe entrance point. The quadrature encoder measures the cable length to track the vehicle’s position from the GPS starting point. 

Up to 1,024 bytes of application-supplied data can be inserted in the H.264 or MPEG stream at regular frame intervals or as a single shot. Closed captions are supported for H.264 streams. Image transformation such as resizing, rotation and mirroring are independently configurable for each stream, as are compression type and bit rate. 

Digital port inputs are compatible with TTL/CMOS and differential RS-422 signals. Incremental encoders can be powered by the 2253P or external power. When a port is used as dual GPIOs, the host can manually monitor GPIO states or the port can automatically send notifications over USB upon state changes. Each GPIO can also be used to control stream flow. 

“The device does not require any maintenance,” Khvilivitzky says. “Updates are provided, if necessary, in the form of software installed on the host computer of the base station.” 503/684-8005; www.sensoray.com/2253.


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