Dual-channel digital frequency meter

By employing a dual-channel design and the STM32F429IGT6 chip, the problems of single channel and narrow frequency bandwidth in digital frequency meters are solved. This enables simultaneous measurement and high-precision comparison of two signals, broadens the measurement frequency bandwidth, and makes it suitable for multi-signal scenarios.

CN223955685UActive Publication Date: 2026-02-27TONGDA COLLEGE OF NANJING UNIV OF POSTS & TELECOMM
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Patent Information

Application Number
CN202520439309.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-13
Publication Date
2026-02-27
Estimated Expiration
2035-03-13

AI Technical Summary

Technical Problem

Existing digital frequency meters have only one channel, making it impossible to measure multiple signals simultaneously, and the hardware circuit design limits the measurement frequency bandwidth and signal adaptability.

Method used

Design a dual-channel digital frequency meter using an STM32F429IGT6 chip. Combine a first signal shaping circuit, a second signal shaping circuit, a first frequency divider circuit, and a second frequency divider circuit. Implement dual-channel measurement through a relay switch and a gate control circuit, and broaden the measurement frequency bandwidth.

Benefits of technology

It enables simultaneous measurement and comparison of two signals, broadens the measurement frequency bandwidth, adapts to a wider frequency range, improves measurement accuracy and reliability, and supports signal detection and analysis in more complex scenarios.

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Abstract

The utility model provides a dual-channel digital frequency meter, and belongs to the technical field of digital frequency meters. Comprising a single-chip microcomputer, a display circuit and a power supply circuit used for supplying power, the system also comprises a first signal shaping circuit, a first relay switch K1, a first frequency divider circuit, a second relay switch K2, a second signal shaping circuit, a third relay switch K3, a second frequency divider circuit, a fourth relay switch K4, a multivibrator circuit used for outputting a preset gate signal, and a gate control circuit. According to the dual-channel digital frequency meter, dual-channel measurement can be achieved, two paths of signals can be measured and compared at the same time, and the requirement for simultaneous detection and analysis of different signals in more complex scenes is met.
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