Piezoelectric Sensor Skipping Rope for Accurate Skip Counting

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Solution Overview

Problem

Conventional methods for counting rope skips during rope skipping exercises are prone to errors due to human observation limitations, and existing automatic counting technologies using inertial sensors, photoelectric sensors, and visual recognition face challenges such as accuracy issues, interference, and mechanical complexity.

Innovation Solution

A skipping rope equipped with a position and posture detector, including a piezoelectric ceramic sensor and mass block, that detects position and posture information to accurately count rope skips, using a processor and counter to determine valid skips based on voltage changes, with a simple structure and low cost.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If human visual observation is used for counting rope skips, then the counting method is simple and requires no additional devices, but the counting accuracy is low due to difficulty in observing rapidly moving rope and human calculation mistakes

Engineering Contradiction:

Improvecounting accuracyVSAvoidcounting system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical human visual observation and manual counting system with an automatic detection system using a piezoelectric sensor. The sensor detects position and posture information of the skipping rope body, and a processor automatically counts the skips, eliminating human error and improving accuracy without requiring complex mechanical structures.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a piezoelectric sensor as an intermediary device between the skipping rope and the counting function. The sensor detects physical parameters (position and posture) of the rope and converts them into electrical signals that can be processed by the counting device, enabling accurate automatic counting.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Extent of automation

If inertial sensors are used for automatic counting, then the counting is automated, but the device complexity increases and accuracy issues arise

Engineering Contradiction:

Improvecounting automationVSAvoidsensor system complexity

Core Design Contradiction:

Extent of automationVSDevice complexity

Solution Approach 1:

The patent replaces complex inertial sensors with a simpler piezoelectric sensor system. The piezoelectric sensor detects position and posture information through electrical field changes rather than requiring complex mechanical inertial measurement units, achieving automation with reduced device complexity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Extent of automation

If photoelectric sensors are used for counting, then automated detection is achieved, but the system is susceptible to environmental interference

Engineering Contradiction:

Improvedetection automationVSAvoidenvironmental interference

Core Design Contradiction:

Extent of automationVSObject-affected harmful factors

Solution Approach 1:

The patent replaces photoelectric sensors (which are sensitive to light interference) with piezoelectric sensors that detect mechanical position and posture through electrical field changes. This substitution makes the detection system immune to environmental light interference while maintaining automated detection capability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Extent of automation

If visual recognition technology is used for counting, then automated counting is achieved, but the system complexity and cost increase

Engineering Contradiction:

Improvecounting automationVSAvoidmanufacturing simplicity

Core Design Contradiction:

Extent of automationVSEase of manufacture

Solution Approach 1:

The patent replaces complex visual recognition systems (requiring cameras, image processing algorithms, and computational resources) with a simple piezoelectric sensor-based detection system. The sensor directly detects rope position and posture, and a processor counts skips based on this data, achieving automation with much simpler manufacturing requirements.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution provides high accuracy and reliability in counting rope skips, reducing errors and extending the lifespan of the skipping rope, while being cost-effective and resistant to environmental interference.

Implementation Method 1

a piezoelectric sensor, and a mass block. One side of the piezoelectric sensor is fixedly connected to the mass block, and the other side of the piezoelectric sensor, away from the mass block, is fixed on an inner wall of the position and posture detector housing

Methodology Applied

Scientific EffectPiezoelectric effect: Piezoelectric Effect

Data Source

PatentUS12076621B1Skipping rope, method and device for rope skipping counting

Publication Date: 2024.09.03 ZHANG PEILIN

AI summary

A skipping rope, a method and a device for rope skipping counting are provided. The skipping rope includes: a skipping rope body, a rope skipping counting device, and a position and posture detector rotatably sleeved on the skipping rope body. The position and posture detector is configured to detect position and posture information of the skipping rope body, and the rope skipping counting device is configured to receive the position and posture information and perform rope skipping counting processing according to the position and posture information.