Proposed is a method of measuring the slope of a drainpipe while moving through the drainpipe. The method includes following steps: a) continuously measuring a slope of a pipe using a slope sensor disposed in a vehicle when the vehicle moves; b) measuring distances to a ceiling of the pipe in real time through non-contact sensors disposed at four positions, that is, at both sides of front and rear portions the vehicle, the step b) being performed simultaneously with the step a); and c) calculating slope differences, which are the degrees of inclination to the front, rear, left, and right using trigonometry and then correcting the slope by reflecting the slope differences to the slope measured in the step a), when there are differences in the distances measured in step b).

Push-cables and associated apparatus for pipe inspection systems are disclosed. In one embodiment a pipe inspection system includes a camera head, a push-cable including an outer covering enclosing a plurality of electrical conductors for transmitting signals and/or power between the camera head and an electronic device operatively coupled to the push-cable, and a spring assembly disposed about the push-cable near the distal end where the spring assembly comprises a spring with a tapered flex section having a varying cross-sectional area and/or a varying cross-sectional shape.

Push-cables and associated apparatus for pipe inspection systems are disclosed. In one embodiment a pipe inspection system includes a camera head, a push-cable including an outer covering enclosing a plurality of electrical conductors for transmitting signals and/or power between the camera head and an electronic device operatively coupled to the push-cable, and a spring assembly disposed about the push-cable near the distal end where the spring assembly comprises a spring with a tapered flex section having a varying cross-sectional area and/or a varying cross-sectional shape.

Provided are a device configuration, method, etc. for performing imaging investigation in an investigation space using an unmanned aerial vehicle. A system includes: a flight start platform; the vehicle which is connected to a line-type member and equipped with an investigation camera, a travel-direction imaging camera, and a vehicle-side communication unit; an external control device which is equipped with a display unit and an external control device-side communication unit, and which receives the travel-direction image data through the external control device-side communication unit, receives an input of control commands for the vehicle while having a video or still image obtained from the travel-direction image data displayed on the display unit, and transmits a signal indicating the control commands from the external control device-side communication unit; and an attraction device which is connected to the line-type member and attracts the vehicle.

A system for inspection of a sewer network. The system comprises: a cleaning nozzle mounted on a hose; an inspection sled having a camera mounted thereon and a nozzle mounting section selectively engageable to the cleaning nozzle; and a position encoder configured to acquire position data representative of the position of the camera inside the conduit while the sled is moved inside the conduit by the movement of the cleaning nozzle and the camera captures images of the inner wall of the conduit. A method for inspection of a sewer network using the system is also provided.

A system for inspection of a sewer network. The system comprises: a cleaning nozzle mounted on a hose; an inspection sled having a camera mounted thereon and a nozzle mounting section selectively engageable to the cleaning nozzle; and a position encoder configured to acquire position data representative of the position of the camera inside the conduit while the sled is moved inside the conduit by the movement of the cleaning nozzle and the camera captures images of the inner wall of the conduit. A method for inspection of a sewer network using the system is also provided.

A measuring device is provided for measuring an advancement of a cable of a sewer cleaning and/or sewer inspection system. A rotatably mounted magnet is designed such that the advancement of the cable can cause rotations of the at least one rotatably mounted magnet, wherein the magnet follows a movement of the cable in the radial direction during advancement of the cable. A corresponding method is also provided.

A propulsion system is provided for advancing a cable of a sewer cleaning and/or sewer inspection system, comprising a propulsion device, a measuring device for measuring the advancement of the cable, and an evaluation device. The propulsion device and the measuring device are adapted to provide a first and a second measured value of the advancement of the cable independently of one another, and the evaluation device is adapted to form a difference between the first measured value and the second measured value. A control device may be provided which adjusts the advancement based on the determined difference. A correspondingly designed method is also provided.

A system and method for reducing the amount of infiltrate entering a sewer system is provided. The system generally comprises a locking sleeve, hydrophilic gasket, and a locking mechanism, wherein a lateral porthole of said locking sleeve is surrounded by said hydrophilic gasket. The system is preferably installed at a lateral line connection point, wherein a hydrophilic gasket located around the lateral porthole creates the water barrier that prevents infiltrate from entering a newly refurbished host pipe through the hole cut to reestablish flow from the lateral line to the host pipe at the lateral line connection point.

A system and method for reducing the amount of infiltrate entering a sewer system is provided. The system generally comprises a locking sleeve, hydrophilic gasket, and a locking mechanism, wherein a lateral porthole of said locking sleeve is surrounded by said hydrophilic gasket. The system is preferably installed at a lateral line connection point, wherein a hydrophilic gasket located around the lateral porthole creates the water barrier that prevents infiltrate from entering a newly refurbished host pipe through the hole cut to reestablish flow from the lateral line to the host pipe at the lateral line connection point.