92results about "Boundary marks" patented technology

The invention relates to a tunnel deformation online monitoring system based on image analysis and application of the system. The system comprises an identification point, a network camera, a central control computer and a transmission network. The application of the system comprises the following steps of: 1) arranging the identification point; 2) periodically controlling the network camera to carry out zooming photography by the central control computer; 3) transmitting photos to the central control computer by the network camera; 4) performing adaptive filter transformation on the photos by the central control computer; 5) performing gray threshold value transformation by the central control computer; 6) performing image edge detection by the central control computer to acquire the identification point; 7) calculating arch crown sinking displacement and arch springing convergence displacement of the identification point; and 8) judging whether the arch crown sinking displacement and the arch springing convergence displacement are smaller than set threshold values, if so, returning to the step 2), otherwise, giving an alarm. Compared with the prior art, the invention has the advantages that the system is easy to implement and can realize online monitoring and automatic alarm.

A cable marker includes a flag for connection to a support stake, wherein the flag has a center portion for connection to the support stake and includes a first side portion having an exterior display surface for an identification sign and a second side portion having an exterior display surface for an identification sign. By using a first side portion having an exterior display surface with an identification sign and a second side portion having an exterior display surface with an identification sign, the problem of not knowing the type of underground line being identified by the marker is avoided.

It is an object to measure a position of a feature around a road. An image memory unit stores images in which neighborhood of the road is captured. Further, a three-dimensional point cloud model memory unit 709 stores a point cloud showing three-dimensional coordinates obtained by laser measurement which is carried out simultaneously to the image-capturing of the images as a road surface shape model. Using an image point inputting unit 342, a pixel on a feature of a measurement target is specified by a user as a measurement image point. A neighborhood extracting unit 171 extracts a point which is located adjacent to the measurement image point and superimposed on the feature for the measurement target from the point cloud. A feature position calculating unit 174 outputs three-dimensional coordinates shown by the extracted point as three-dimensional coordinates of the feature for the measurement target.

A surveyor's mark and a method for forming the mark. The mark includes a stick and a head assembled to the stick. The stick is configured to be planted in a ground and the head is configured to be above the ground. The head includes a tag having an identification number. The identification number has a value which is a first code value. The stick includes a thin wire configured as an electrical conducting loop and connected to the tag. If the stick is planted in the ground and the head is above the ground, then pulling the head in an attempt to pull up the mark from the ground results in the head being disassembled from the stick and the thin wire breaking so as to open the loop which changes the value of the identification number from the first code value to a second code value.

A device 20 for location and identification of pipes, conduits, cables or buried or hidden objects 8 is described without the need of any invasive and / or destructive work, said device comprising at least one transponder 1 utilizing RFID or like technology for identification without any physical contact or line-of-sight, said transponder 1 being attached in a support 7 shaped as a mesh, tape, wire, cable, cordage or alternatively in a device 32 / 33 such as a bar, tappet, line, stud, mushroom, pipe, marker or the like, device 20 resulting from the combination of 1 and 7 or of 1 and 32 / 33. A system for location and identification of said objects 8 comprises said device 20 and further a reading and / or writing unit 3 of the information on said pipe, conduit, cable or buried or hidden object 8, at least an antenna 2 besides said pipe, conduit, cable or buried or hidden object 8. Also described is the method for installing device 20, the method for location and identification of a pipe, conduit, cable or buried or hidden object 8, as well as the method for mapping and execution of as-built plants of pipes, conduits, cable or buried or hidden objects 8 without the need of any invasive and / or destructive work.

It is an object to measure a position of a feature around a road. An image memory unit stores images in which neighborhood of the road is captured. Further, a three-dimensional point cloud model memory unit 709 stores a point cloud showing three-dimensional coordinates obtained by laser measurement which is carried out simultaneously to the image-capturing of the images as a road surface shape model. Using an image point inputting unit 342, a pixel on a feature of a measurement target is specified by a user as a measurement image point. A neighborhood extracting unit 171 extracts a point which is located adjacent to the measurement image point and superimposed on the feature for the measurement target from the point cloud. A feature position calculating unit 174 outputs three-dimensional coordinates shown by the extracted point as three-dimensional coordinates of the feature for the measurement target.

A survey marker having a rod with a pointed tip and a shank extending therefrom composed of a rod or rebar material. A head extending from a distal end of the rod opposite the point may include means for retaining a survey flag, means for engaging a drive tool, and means for alignment.

A surveying system having a total station integrated into an unmanned aerial vehicle communicates with a plurality of mobile communication stations that are located on known site coordinates. By locating the mobile communication stations on known coordinates, the location of the aerial vehicle is precisely triangulated and controlled. Construction drawings are loaded into the system, thereby allowing the vehicle to locate itself at specific points designated in the drawings for the marking of on-site construction grid lines.

Embodiments of the present invention recite a geographic marking device and a data storage device coupled therewith for storing information associated with a geographic location at which the geographic marking device is located. In embodiments of the present invention, the information may comprise geographic position data of the geographic marking device as well as additional information about an object which is substantially fixed at the geographic location. In another embodiment of the present invention, a geographic data system is recited comprising the geographic marking device described above and a portable electronic device for accessing information stored thereon.

A marker installation system comprises a marker comprising a shaft having a bottom end and a top end, and including an insertion portion, a mast portion, and an engagement portion located between the insertion portion and the mast portion. The engagement portion is configured to resist further insertion of the shaft into the ground beyond the insertion portion. The system includes a marker installation apparatus including a magazine assembly defining a magazine space in which the marker is positioned. The magazine space has a push position in the magazine space for receiving the marker. The apparatus includes a push assembly mounted on the magazine assembly to engage the engagement portion of the marker when the marker is located in the push position. The push assembly pushes the marker from the push position of the magazine assembly when the push assembly is actuated.