CS249872B1 - Penetration resistance measuring device - Google Patents

Abstract

The solution relates to a measuring device penetration resistance. According to the solution, dyna- a meter with strain gauges, being dynamometer connected through a measuring rod with a replaceable cone and potentiometric a cone position sensor that is connected through Toothed rack sprockets rod ending with foot. potentiometric the sensor is connected to the dynamometer via a thatch. The device is portable and allows for using a recording recording equipment a record penetration resistance and cone depth in various ductile materials, e.g. soils etc.

Description

The invention relates to a device for measuring the resistance of penetration of ductile materials, e.g. soils, continuously in different depths of the profile.

To measure the penetration resistance, various mechanical spring-loaded indicator sensors are used to register the measured value of the insertion force in dependence on the penetration depth of the penetration cone into the ductile mass, which is sensed mechanically and is written on paper.

Said arrangement of mechanical elements results in reduced measurement accuracy, increased maintenance and adjustment of the mechanical parts of the transmission of the recording equipment.

The above-mentioned drawbacks are eliminated by a device for measuring the penetration resistance of a cone in a ductile mass by an electric path according to the invention, which consists of a dynamometer with strain gauges having a handle attached at the top. A plate and a measuring rod are attached to the lower part of the dynamometer, terminated by a replaceable cone. A rotary potentiometer is mounted on the plate, engaging over the gear wheels with the toothed rack of the sliding bar terminated by the foot.

This arrangement makes it possible to obtain e249872 electrical signals of the measured quantities and to record them on a recording device.

The device is suitable for measuring the penetration resistance of ductile materials, e.g. soils, etc., in various profile depths, as well as for measuring the depth itself.

In the accompanying drawing, an example of an embodiment of the invention is shown, in which FIG. 1 is a front view and FIG. 2 is a side view of a penetration resistance measuring device.

The penetration resistance measuring device consists of a dynamometer 3 with strain gauges 4 having a handle 1 attached at the top, secured by a nut 2. A plate 5 is secured to the bottom of the dynamometer 3, secured by a positioning nut 6 and a measuring rod 7 terminated by a replaceable cone 8 s 30 °. On the plate 5 is mounted a rotary potentiometer 11 engaging the toothed rails of the sliding bar 12 through the toothed wheels 14, 9, 13 terminated by the foot 10. The sliding bar 12 is guided in a housing 15 mounted on the plate 5.

The penetration resistance measuring device is portable and allows, with additional electrical parts, a source and recorder, to measure and record the penetration resistance depending on the cone turning depth in the various ductile materials.

Claims (1)

Device for measuring penetration resistance, comprising a dynamometer connected via a cone rod and a potentiometric cone position sensor, characterized in that a dynamometer (3) provided with strain gauges (4) is connected via a measuring rod (7) to a replaceable cone (8), The dynamometer (3) is a fixed plate (5) on which a rotary potentiometer (11) is connected, connected via gears (14, 9, 13) to the rack of the sliding bar (12), terminated by the foot (10).