초록 ▼

A pile driving hammer monitoring apparatus is disclosed to include a pressure wave sensor, such as a hydrophone, remotely located from the pile driving equipment for detecting pressure waves generated by the hammer striking a pile. The sensor generates a proportional analog electrical signal which i

A pile driving hammer monitoring apparatus is disclosed to include a pressure wave sensor, such as a hydrophone, remotely located from the pile driving equipment for detecting pressure waves generated by the hammer striking a pile. The sensor generates a proportional analog electrical signal which is conditioned into a corresponding digital electrical signal and conveyed to a microcomputer. The microcomputer calculates the hammer blow rate over a predetermined time period or over a selectable time period or distance of pile movement. Data independent of the blow rate information is enterable into the microcomputer by means of presettable multi-position switches. The apparatus can be powered either by an alternating current source or a direct current source.

대표청구항 ▼

An apparatus for remotely monitoring and evaluating the rate at which a pile driving hammer strikes a pile located in a liquid, said apparatus comprising: sensing means comprising a hydrophone, disposed in the liquid remotely from the pile driving hammer and the pile, for sensing a pressure wave gen

An apparatus for remotely monitoring and evaluating the rate at which a pile driving hammer strikes a pile located in a liquid, said apparatus comprising: sensing means comprising a hydrophone, disposed in the liquid remotely from the pile driving hammer and the pile, for sensing a pressure wave generated by the pile driving hammer striking the pile and for generating an analog electrical striking signal proportional to the sensed pressure wave; electrical signal conditioning means for converting the analog electrical signal to a digital electrical striking signal being electrically connected to said hydrophone; clock means for providing an electrical timing signal; integrated circuit computer means, responsive to the digital electrical striking signal and the electrical timing signal, for computing a first value indicating the rate at which the pile driving hammer strikes the pile during a predetermined time period; switch means, connected to said computer means, for effectively altering the predetermined time period so that said computer means computes a second value indicating the number of hammer strikes which occurred during the effectively altered time period; and display means for displaying the computed first and second values.