CN2442228Y - Balance hammer type slope measurer - Google Patents

Abstract

The utility model discloses a counterweight type inclinometer, which has a sealing cylinder, and a displacement sensor and a counterweight are respectively hinged and hung on the inner top of the sealing cylinder, and the displacement sensor and the counterweight are always kept parallel under the action of gravity. Vertically drooping, the displacement sensor and the lower end of the counterweight are fixedly connected as a whole by a connecting plate, and the power supply and signal line of the displacement sensor are led out from the sealing cylinder through the sealing part. It can automatically and continuously monitor the inclination of soil or buildings, and has simple structure, convenient operation and stable and reliable work.

Description

Counterweight Inclinometer

The utility model relates to a measuring instrument for measuring the inclination of geotechnical engineering structures such as dikes, dams, rock-soil slopes, foundation pit excavation walls, retaining walls and the like in engineering survey, in particular to a counterweight type inclinometer.

At present, the instrument inclinometer used to measure the inclination of rock and soil structures at home and abroad is generally composed of a measuring head, a measuring instrument and an inclinometer tube, such as the CX-01A type manufactured by the Thirty-three Research Institute of the Aerospace Industry Corporation. Inclinometer. The probe of this type of inclinometer is the heart and is where the measurement signal comes from. The probe contains a servo accelerometer with a sensitive axis. When the probe is tilted, the sensitive axis is also tilted, there will be an angle between the sensitive axis and the reference line, that is, the gravitational acceleration line, and the accelerometer will have an output. The inclinometer pipe is buried vertically in the soil in advance, and the inclinometer pipe will bend if the soil such as dikes and dams is displaced horizontally. When measuring, the inclinometer probe moves in the curved inclinometer tube to measure the inclination angle at different elevations, and the horizontal displacement at different elevations can be obtained through cumulative calculation. The problems with this type of inclinometer are: (a) the inclinometer tube must be buried in advance; (b) manual operation is required to allow the measuring head to move within the inclinometer tube. When the inclinometer pipe is submerged by water (such as flood), it can no longer be measured; (c) it can only be measured intermittently, and the process of continuous displacement of the soil cannot be measured, so real-time monitoring cannot be done; (d) the technology of the accelerometer The content is high, and the production quality of general manufacturers is difficult to guarantee, resulting in low precision of the inclinometer, and it is prone to failure and short service life. Generally, it will be scrapped within three years, and the use cost is high.

The purpose of the utility model is to provide a counterweight type inclinometer which can automatically and continuously monitor the inclination of soil or buildings, and has simple structure, convenient operation, stable and reliable operation.

In order to achieve this purpose, the counterweight type inclinometer designed by the utility model has a sealed cylinder, and the inner top of the sealed cylinder is respectively hinged and hung with a displacement sensor and a counterweight. Both the displacement sensor and the counterweight are under the action of gravity. Keep parallel and vertical sagging all the time, the lower end of the displacement sensor and the counterweight is fixedly connected as a whole by a connecting plate, and the power supply and signal line of the displacement sensor are drawn out of the sealing cylinder through the sealing part. Its working principle is as follows: the counterweight inclinometer is vertically buried in the soil or fixed on the building. When the soil or the building tilts, the sealing cylinder of the inclinometer tilts at the same angle. Since both the displacement sensor and the counterweight are hinged on the top of the inside of the sealed cylinder, and the lower ends of the two are connected as one, under the action of gravity of the counterweight, the displacement sensor and the counterweight always maintain a vertical direction, and the length of the counterweight cannot be changed. Make the displacement sensor stretch or shorten. The deformation of the displacement sensor corresponds to the inclination angle of the sealing cylinder, and the linear relationship between the two can be obtained through a calibration test. Therefore, the inclination angle of the soil or building can be known through the output of the displacement sensor.

The utility model has the advantages that: the displacement sensor and the counterweight are installed in the sealed cylinder, and will not be affected by the external environment such as stagnant water, and the power supply and signal line of the displacement sensor are connected to the automatic data collector to realize automatic Continuous and uninterrupted monitoring can also be monitored in the submerged state during the flood season. The sealing cylinder can be directly buried in the soil without the inclinometer tube, can also be installed on the inclinometer tube, and can also be bound to any building such as the wall of the excavation of the foundation pit. Its structure is simple, and it is convenient and quick to install and use. The displacement sensor is the most mature device in engineering measuring instruments, and its accuracy and long-term stability are guaranteed. The counterweight inclinometer based on this is simple to process, high in precision, good in long-term stability, and extremely low in cost.

Embodiments of the utility model are described in further detail below in conjunction with the accompanying drawings:

Fig. 1 is the structural representation of a kind of counterweight type inclinometer;

Figure 2 is a schematic diagram of the measurement principle of the inclinometer.

The counterweight type inclinometer shown in the figure includes a sealing cylinder composed of a cylinder body 10, an upper end cover 1, and a lower end cover 12. An O-ring 5 is arranged between the upper end cover 1 and the cylinder body 10, and the lower end cover 12 An O-ring 13 is arranged between the cylinder body 10 and is fastened with a threaded connection. A support frame 11 is installed on the inner side of the upper end cover 1, and the support frame 11 is respectively articulated and suspended by a steel wire rope 2 with a displacement sensor 6 and a counterweight 7. The displacement sensor 6 and the counterweight 7 are always kept parallel and vertically downward under the action of gravity. The lower end of the person is connected integrally by a connecting circular plate 8. There is an outlet hole on the upper end cover 1, and the outlet hole is sealed by the O-ring 3 and the fastening screw 9 arranged therein, and the power supply and signal line 4 of the displacement sensor 6 are drawn out from the sealing cylinder through the outlet hole. For long-distance long-distance monitoring in the field, the frequency signal transmission is more stable, and the displacement sensor 6 should choose the type whose output is a frequency signal. Selecting a small displacement sensor allows for a small form factor for the inclinometer.

The counterweight inclinometer is vertically buried in the soil or fixed on the building. When the soil or the building is tilted, the sealing cylinder of the inclinometer is inclined at an angle of θ, which will make the displacement sensor elongate or shorten. Δh distance. The signal is transmitted to the data collector through the power supply and signal line of the displacement sensor, and the inclination angle of the soil or building can be calculated.

Claims (1)

A counterweight type inclinometer, which is characterized in that it has a sealed cylinder, and a displacement sensor and a counterweight are hingedly suspended on the inner top of the sealed cylinder, and the displacement sensor and the counterweight are always kept parallel and vertical under the action of gravity. The displacement sensor and the lower end of the counterweight are connected together by a connecting plate, and the power supply and signal line of the displacement sensor are led out of the sealing cylinder through the sealing part.

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