This paper introduces the structure,characteristics and work principles of the single line digital temperature sensor DS18B20,and probes into the application of DS18B20 in dam's displacement measuring system from aspects of the hardware design of temperature measuring circuit and the on off degree calculation.
Introduced the way to design the circuit of the numerical control machine tools grating-ruler displacement measure system as well as its software design approach in AT89S51.Designed a device which can real-time measure and display the displacement of the work piece online in the accuracy of ±0.01 mm whit the principle of the numerical control machine grating-ruler displacement sensor and the method of the direction-judgment circuit.
Then, a two-dimensional non-linear finite element scheme is used to simulate the annual periodic variations caused by the change of temperature in the data of the displacement measurements across faults.
According to the data of geological investigation, the strike statistics of the river system, focal mechanism solutions, seismic intensity line, fault displacement measurements, geostress measurement and so on, this paper deals with the structure stress field evolution and the formation mechanism of the Weihe basin.
3D displacement measurement by white light digital image analysis in frequency domination area
However, multipath effects and low sampling frequencies affect the accuracy of GPS for displacement measurement.
The sensitivity of the displacement measurement is Δxmin=5?fm with a 1?Hz bandwidth.
The prospects of reaching the standard quantum limit in an interferometric displacement measurement using a macroscopic oscillator are discussed.
The excess noise contribution of this test mass jitter onto the sensitive displacement readout was completely subtracted by fitting the angular interferometric data streams to the longitudinal displacement measurement.
To reduce or eliminate speckle noise, we developed a new optical stylus profiling system consisting of a displacement measuring part using a knife-edge and a speckle noise measurement part.
The resolution of this (combined) displacement measuring method was assessed on translation and uniaxial tensile tests to be 5 nm for in-plane displacement components and 1.5 nm for out-of-plane motion over the same area.
Operation of conventional displacement measuring interferometers requires a co-operative target and an accurate alignment procedure.
This unit is used as the blade displacement measuring sensor of our wafer slicing machines.
This estimate presumes that a tension test frame, having associated load and displacement measuring capabilities, is available.
The implications of the frequency data are discussed in conjunction with the strain and displacement measurements in order to discern if the load carrying capacity of the bridge has been affected.
Both static and modal displacement measurements are utilized to increase the number of damage prediction sets.
Two-dimensional photothermal displacement measurements were carried out on TiO2, ZrO2, and HfO2 coatings to uncover single shot incubation produced by 248 nm laser light at fluences below the damage threshold.
Uncertainty measures have been introduced to filter out unreliable displacement measurements.
Dynamic excitation of the beam at one point and displacement measurements at a single position are sufficient.