T/HBJLXH 009-2023 Surface vibrating compaction device calibration method

Scope

Main technical content: 4. Measurement characteristics - Vibration force: (10–80) kN - Static pressure: above 18 kPa (the force value corresponding to the small cylinder shall not be less than 300 N; the force value corresponding to the large cylinder shall not be less than 1.1 kN) - Vibration frequency: (30–50) Hz - Test cylinder specifications: - Large cylinder inner diameter: 280 mm - Small cylinder inner diameter: 152 mm - Time: within 30 seconds, with an error of less than 3 seconds 7. Calibration method 7.1 Calibration process a) Vibration force calibration - Use the vibration compaction head installation process hole and the test mold fixed pressing plate to install the dedicated vibration force test stand. The test board (upper) of the dedicated vibration force test stand is connected to the plane where the vibration compaction head is installed by bolts, and the test board (lower) is connected to the upper plane of the base by the pressing plate of the test mold. Start the vibration motor and, through a single measurement, the vibration force test stand displays the vibration impact force of the vibration unit as the measurement result. b) Static pressure calibration - Turn off the power of the vibration compaction instrument, clean the plane on the base, and polish it until smooth. Manually lift the vibration compaction table, place a standard force gauge between the vibration compaction head and the upper plane of the base, and align the center of the standard force gauge sensor with the center of the vibration compaction head. Manually lower the lower real working table, disconnect the connector, and ensure that the vibration compaction table fully acts on the standard force gauge sensor. Record the reading of the standard force gauge. c) Vibration frequency calibration - Prepare a speed measurement instrument and fix a reflective film on the rotating part of the vibration

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