Automatic measuring instrument for crystal inflection point of oven-controlled crystal oscillator (OCXO)

Abstract

The invention relates to an automatic measuring instrument for a crystal inflection point of an oven-controlled crystal oscillator (OCXO), and the automatic measuring instrument comprises a debugging rack, an inflection point debugging socket (1), an inflection point debugging board (2), a radio frequency control board (3), a frequency measurement instrument (4) and a control computer (5). An only address code is sent to the inflection point debugging board, the resistance of a digital potentiometer of the address is set as a designated value, and the frequency of each oven-controlled crystal oscillator is read. A temperature-frequency characteristic curve of the oven-controlled crystal oscillator is fitted according to measured data, and the resistance value at the crystal inflection point is calculated. Compared with the prior art, the automatic measuring instrument has the following beneficial effects that the debugging equipment is used, each piece of equipment can debug 160 OCXOs each time, and other operations except for placing the OCXOs do not need to be performed by workers; each debugging needs about 3-4 hours, namely about 40 OCXOs are debugged in each hour; compared with the debugging speed of manual debugging for 4-5 OCXOs in each hour, the efficiency is increased by more than 10 times; and as accurate data provided by software is used for modeling, the one-time temperature-frequency characteristic passing rate can be close to 99 percent, which is greater than 80 percent of manual debugging.

Description

technical field [0001] The invention relates to an automatic measuring instrument, in particular to an automatic measuring instrument for batch measurement of the zero temperature change point (generally called inflection point in production) of the temperature curve of the constant temperature crystal oscillator in the mass production of the constant temperature crystal oscillator. Background technique [0002] Oven-controlled crystal oscillator (OCXO for short) is a frequency reference product and a high-precision electronic device, which is widely used in 3G communications, military, high-end instruments and other places that require very high time accuracy. The production of OCXO is quite difficult. At present, more than 80% of domestic OCXO relies on imports. This is because more than 90% of OCXO production is for the measurement and debugging of product parameters. The difficulty of mass production of OCXO lies in automation and mass production. parameter measurement t...

AI Technical Summary

Problems solved by technology

Due to the long measurement time and the need to record data and calculations, generally a most skilled worker can only debug 4 to 6 OCXOs per hour, and the efficiency is very low

Moreover, due to manual measurement, there are a lot of estimates. In fact, the pass rate of the temperature-frequency characteristic test is generally only 80%, which requires multiple rework and retesting.

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