Portable Elevator Vibration Tester With Signal Isolation
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Solution Overview
Problem
Existing elevator vibration testers, such as EVA, are large, cumbersome, lack language flexibility, have low accuracy, and fail to perform intelligent data analysis, remote monitoring, and noise reduction, leading to inadequate control of elevator malfunctions and safety concerns.
Innovation Solution
A portable elevator operation quality tester with a three-axis acceleration sensor, power isolation, and signal isolation modules, enabling accurate data acquisition and noise reduction, and featuring a touchscreen interface, Bluetooth communication, and filtering algorithms for improved data accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a prior elevator vibration tester (EVA) is used, then the testing function is available, but the device is large, cumbersome and inconvenient to carry
Solution Approach 1:
The patent integrates the acceleration sensor, signal processing circuits, power supply, and control system into a single integrated handheld device rather than using separate components. This segmentation consolidation enables the device to be portable while maintaining full testing functionality.
Solution Approach 2:
The patent replaces the mechanical/cumbersome structure of prior testers with an integrated electronic system where the acceleration sensor directly connects to processing circuits and a display, eliminating the need for external PCs and cables, thus achieving portability.
2Measurement precision
If the acceleration accuracy is ±0.6 mg with prior testers, then basic measurement is possible, but the measurement precision is insufficient for accurate analysis
Solution Approach 1:
The patent introduces an isolation module as an intermediary between the acceleration sensor and the back-end data processing system. This isolation module prevents noise transmission while maintaining signal integrity, thereby improving measurement precision without requiring complex shielding or filtering systems.
Solution Approach 2:
The patent extracts and isolates the noise source (back-end data processing system) from the sensitive measurement circuit (acceleration sensor) using an isolation module. This separation allows the measurement system to operate with high precision independent of the complex processing system.
3Ease of operation
If the prior tester interface is only in English, then the device structure is simple, but the ease of operation is reduced for non-English users
Solution Approach 1:
The patent implements a touchscreen interface that can display multiple languages, making the device universally accessible to users regardless of their language preference. This multi-language capability is integrated into the same device without requiring additional hardware.
4Productivity
If the prior tester cannot perform filtering and spectral analysis, then the device structure is simple, but the productivity is reduced due to reliance on external PC processing
Solution Approach 1:
The patent merges the data acquisition, filtering, spectral analysis, and result display functions into a single integrated device. The acceleration sensor connects directly to processing circuits that perform real-time filtering and spectral analysis, eliminating the need for external PC processing and significantly improving productivity.
5Reliability
If the prior tester cannot perform remote online monitoring and malfunction forewarning, then the device structure is simple, but the reliability is reduced for safety monitoring
Solution Approach 1:
The patent incorporates a feedback mechanism where the acceleration sensor continuously monitors elevator vibrations and the processing system analyzes the data in real-time. When abnormal patterns are detected, the system provides immediate feedback through alarms or notifications, enabling proactive safety monitoring and malfunction forewarning.
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 a portable, high-precision elevator vibration testing system that reduces noise interference, enhances data accuracy, and enables intelligent judgment and remote monitoring, addressing the limitations of prior art.
Implementation Method 1
a three-axis acceleration sensor, converts the acquired analog signal data into digital signal data through the analog-digital conversion module
Data Source
AI summary
The invention provides an elevator operation quality tester, comprising a rectangle aluminium-alloy housing provided with a casing and a covering, an upper opening of the casing is provided with a groove for embedding in a touching screen; circuit board, three-axis acceleration sensor and rechargeable battery supplying power to the circuit board are provided in the casing; the circuit board is provide with elevator vibration data acquisition circuit, back-end data processing system, interface circuit and radio communication circuit; the casing is provided with a handle on the side; the elevator vibration data acquisition circuit comprises a power isolation module, a power circuit conversion module, a three-axis acceleration sensor, an analog and digital signal isolation module and a analog-digital conversion module, the power isolation module isolates an external power supply, and the power isolation module is connected to the power circuit conversion module.