COMPACT DEVICE FOR MEASURING THE SPEED AND THE DIRECTION OF ROTATION OF AN OBJECT

摘要

The invention concerns a device for measuring the speed and direction of rotation of an object near to which it is placed. It comprises: - a magnetic detection device that delivers, in response to a rotation of the object generating a magnetic field variation, signals representative of its speed and its direction of rotation, - a conductor intended to be connected to a power source to supply current to the magnetic detection device at least, -detection device and the conductor that create, from signals coming from said magnetic detection device, a modulation of the current flowing in the conductor, said modulated current reflecting both the speed and the direction of rotation of the object. Application particularly in the oil industry.