Is it the same for different inclinometers?

The YS-103A type reader for fixed inclinometer measurement is connected to the reader at one end of the measuring cable, and the output cable of the upper inclinometer is corresponded to the other end of the clip of various colors, with black and red as the power supply end and white and green as the measurement end.

The red (+) and black (-) cores of the observation cable and the connecting wire are the voltage input terminals, and the voltage input value is 16V; White (a) and green (b) are the signal outputs.

The fixed inclinometer is equipped with an intelligent identification chip, and its memory stores the number, calibration coefficient and address code of the inclinometer. When measuring with the reader, the identification information will be automatically read out, stored in the reader, and communicated to the computer to facilitate rapid statistical calculation and query, so that the measurement work can realize artificial intelligence paperless operation.

A number of inclinometer cables at the project site were accidentally cut, and the number and identity information corresponding to each inclinometer could be automatically identified by measuring it only once with the reader.

Portable digital inclinometers are often used to monitor the lateral displacement of landslide areas and excavated soil in deep holes, but also to monitor deformations such as embankment structures. At its core is a two-force balanced servo accelerometer. With the advantages of durability, high precision and fast response, inclinometer tubes are usually installed in vertical boreholes that pass through unstable soil layers to the lower stable formations.

The deformation of the inclinometer tube is observed using a digital vertical activity inclinometer probe, control cables, pulley units, and a reader. The first observation can establish an initial cross-section of the displacement of the inclinometer. Subsequent observations show changes in the displacement of the section as the ground moves.

During the observation, the probe moves from the bottom of the inclinometer tube to the top, pauses at a half-meter spacing and performs the measurement tilt. The inclination of the probe is measured by two force-balanced servo accelerometers. An accelerometer measures the longitudinal position of the groove of the inclinometer tube, i.e., the inclination of the plane on which the gauge wheel is located on the inclinometer probe.

The other accelerometer measures the inclination perpendicular to the plane of the wheel. The inclination can be converted to lateral displacement. Comparing the current and initial observations, the amount of change in lateral shift can be determined, showing the movement displacement of the formation.

Plotting the amount of change in the offset yields a high-resolution cross-section of the displacement. This cross-sectional view helps to determine the magnitude, depth, direction, and rate of ground motion displacement. Inclinometers are divided into portable inclinometers and fixed inclinometers, portable inclinometers are divided into portable vertical inclinometers and portable horizontal inclinometers, fixed types are divided into uniaxial and biaxial inclinometers, and the most widely used is portable inclinometers.

The so-called borehole trajectory actually refers to the borehole axis. The axis of the wellbore of a live well is a spatial curve. In order to control the trajectory, it is necessary to understand the shape of this spatial curve, and it is necessary to carry out trajectory measurement, which is called "inclination".

The instrument used is called an inclinometer. A point is measured at intervals of a certain length of well, and these sections are called "sections", and these points are called points. The inclinometer measured three parameters at each point, namely the well depth, the well inclination angle and the well inclination azimuth.

These three parameters are the basic parameters of the trajectory. <>

Inclinometers are now widely used in dams and geotechnical engineering to measure the inclination of foundations or structures, and such sensors must have good impact resistance, otherwise they cannot be used in engineering. At present, whether it is a servo accelerometer or a resistance strain gauge inclinometer, there is a fatal weakness that is poor impact resistance, which makes the inclinometer very easy to damage and has a high repair rate. The inclinometer is a movable reusable instrument, and its impact-resistant type should be particularly important.

The steel cable with the center diameter is extruded from sliding in the cable, and the tinned copper core of the multi-core section can fully meet the requirements of the above performance. Polyurethane is the most stable material in the cable material, it is extremely difficult to change the chemical and physical properties after extrusion and shaping, so it is not afraid of fire, acid resistance, alkali resistance, damage resistance, low temperature is not hard, high stability is not soft, sharp rock is difficult to damage it, it should be the most ideal supporting cable for the inclinometer. <>

When the fixed inclinometer leaves the factory from the manufacturer, it is packaged in parts, and the first thing to check is whether the guide wheel of the inclinometer rotates flexibly and whether the torsion spring is strong. Check whether the sensor parts are working normally (based on the plumb line, the reading on one side of the high-end guide wheel tends to increase, and the reading on the other side decreases), intercept the connecting wire rope according to the design elevation (the design elevation is increased by 25cm), and connect the fixed inclinometer with the wire rope end to end, and assemble the measurement unit according to the number required by the design drawing. Hoisting is to put into the inclinometer tube in the order of each measuring unit, and each measuring unit is connected with a wire rope, the connection must be firm, and the direction of all guide wheels of each measuring unit must be consistent.

If only one set of fixed inclinometer is installed in the measuring hole, only the head of the fixed inclinometer needs to be connected with the wire rope. During installation, according to the displacement direction that needs to be observed by the measured body, the positive direction (high wheel direction) of the rod guide wheel should be aligned with the main direction of the measuring plane of the inclinometer tube, slowly slide into the measuring tube, straighten out the instrument cable, and tie the cable with the hoisting wire rope with a self-locking cable tie at each depth, and do not tie it to the rod component of the fixed inclinometer. When placed at the design elevation, the final hoisting wire rope is fixed on the transverse axis of the orifice device, locked with a lock, and the cable is buried according to the design direction.

It should be noted that each set of fixed inclinometers should be numbered and recorded in order, and all cables should be relaxed and not tightened. After the decentralization is completed, the elevation of the instrument should be checked to see if it is accurate, and the hoisting wire rope should be pulled to check whether each sensor is working properly with a reader, and then a stable initial reading should be recorded. If you find a problem, you can pull out the fixed inclinometer and reinstall it.

Finally, the orifice should be provided with protection facilities, and the observation cable should be fixed and buried according to the design direction.