A device and experimental method suitable for calibrating the daily difference of quartz electronic stopwatches

Abstract

A device and experimental method suitable for calibrating the daily difference of a quartz electronic stopwatch. The shell is composed of an upper and a lower cylindrical shell; section, the upper ends of the large and small cylindrical inner cavities are connected through an inverted frustum-shaped inner cavity at the junction of the large and small diameter sections; the upper end of the large diameter section is provided with a mounting notch, and an observation cover is provided at the installation notch plate; the observation screen and diaphragm are installed at the upper and lower ends of the large cylindrical cavity; the lens is installed in the small cylindrical cavity; the photoelectric sampling unit is set at the center of the viewing screen; cavity, and a communication hole is opened in the center of the upper end; the focusing sleeve is fixedly inserted into the communication hole, and it is connected to the outside of the small diameter section through thread fit; multiple supplementary lighting lamps are installed on the top of the cylindrical accommodation cavity. The device and method have high testing precision and convenient operation process, and can quickly and effectively complete the verification of daily difference.

Description

technical field [0001] The invention belongs to the technical field of stopwatch detection, in particular to a device and an experimental method suitable for calibrating the daily difference of a quartz electronic stopwatch. Background technique [0002] Time is one of the most important parameters in nature. With the advancement of measurement technology, the measurement of time intervals is widely used in all aspects of production and life, and the timing methods are also changing with each passing day. Therefore, the measurement of time intervals is also an indispensable testing item for various measurement technical institutions. [0003] The timing reference of most timers comes from the internal quartz crystal oscillator, and the stability of ordinary non-temperature-controlled quartz crystal oscillators can reach 10 -6 The order of magnitude has high requirements for measurement. At this stage, it is usually required to test the accuracy and stability of the interna...

AI Technical Summary

Problems solved by technology

In the prior art, it is recommended to use a daily difference calibrator for the verification of the daily difference, but because the traditional daily difference calibrator uses electromagnetic induction for detection operations, it is easy to be interfered, and the operation process is very inconvenient. At the same time, the instrument cost Therefore, most of the stopwatches did not use the daily difference calibrator to test the accuracy when they built the standard. Instead, they chose the calibration method of 1-day upward travel time for detection. This method is extremely time-consuming. In the actual operation process, unless it is necessary, the general stopwatch test should try to avoid the daily difference test

[0004] To sum up, the existing testing equipment is poor in terms of testing accuracy, operation convenience, manufacturing cost and time-consuming, and cannot meet the actual testing needs, and cannot effectively monitor the daily difference of the quartz electronic stopwatch. test

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