Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Multi-channel self-adaptive high-precision LVDT data acquisition and measurement system and method

A technology of data acquisition and measurement method, applied in the direction of measuring force, transmission system, measuring device, etc., can solve the problems of vibrating wire distortion, frequent failure of vibrating wire strain sensor, inaccurate measurement of vibrating wire strain sensor, etc.

Pending Publication Date: 2019-12-31
SHANGHAI FUTURE INTELLIGENCE TECH CO LTD
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

2. The temperature effect of the vibrating wire strain sensor is serious
3. The vibrating wire strain sensor is not suitable for use in complex deformation measurement occasions
If the distribution function of the axial change is not uniform, the vibrating wire installed in the vibrating wire strain sensor on the steel body will be distorted, which can be converted into an additional external force in the axial direction, resulting in inaccurate measurement of the vibrating wire strain sensor. precise
Therefore, it is not surprising that there are frequent failures in the use of vibrating wire strain sensors for engineering stress detection.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multi-channel self-adaptive high-precision LVDT data acquisition and measurement system and method
  • Multi-channel self-adaptive high-precision LVDT data acquisition and measurement system and method
  • Multi-channel self-adaptive high-precision LVDT data acquisition and measurement system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0101] The main technical parameters of the embodiment of the present invention are: a. 32LVDT sampling channel. b. An LVDT sensor with free movable ends is used, and the two ends of the LVDT sensor are fixed on the object to be measured. The length of the two ends (fixed ends) of the LVDT is 150 mm. c. GPRS remote wireless data interaction and Bluetooth short-range data interaction are adopted. d. The axis movement direction of the measured object is consistent with the movement direction of the LVDT sensor's inclined iron. e. The measurement environment temperature range is -10℃-65℃. f. The interval between two adjacent samples is 1 hour.

[0102] See Figure 2 to Figure 20 . A multi-channel self-adaptive self-calibration high-precision LVDT data acquisition and measurement system, consisting of a constant frequency and constant amplitude signal generating unit 1, a channel strobe and LVDT drive unit 2, a gated low noise preamplifier unit 3, and a programmable gain unit 4. ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a multi-channel self-adaptive high-precision LVDT data acquisition and measurement system and method. The system comprises a constant-frequency constant-amplitude signal generation unit, a channel gating and LVDT driving unit, an access gating low-noise pre-amplification unit, a programmable gain unit, a true virtual value rapid sampling unit, a motion direction discrimination unit and a microprocessor unit. The constant-frequency constant-amplitude signal generation unit is connected with the channel gating and LVDT driving unit; the channel gating and LVDT driving unit is connected with the access gating low-noise pre-amplification unit; the access gating low-noise pre-amplification unit is respectively connected with the true virtual value rapid sampling unit andthe motion direction discrimination unit; the true virtual value rapid sampling unit and the motion direction discrimination unit are respectively connected with the microprocessor unit; the microprocessor unit is respectively connected with the channel gating and LVDT driving unit and the programmable gain unit, and the programmable gain unit is connected with the access gating low-noise pre-amplification unit.

Description

Technical field [0001] The invention belongs to the field of detecting instrument manufacturing, and relates to a multi-channel adaptive LVDT data acquisition and measurement system and method suitable for engineering micro-strain monitoring. Background technique [0002] At present, a strain sensor called vibrating wire is widely used in engineering construction, bridges, reservoirs and dams. Vibrating wire strain sensors are widely used in geotechnical engineering due to their simple structure and strong anti-interference ability. [0003] However, the vibrating wire strain sensor has also become a subject of widespread debate in the industry due to its obvious technical defects. A vibrating wire strain sensor that uses a tensioned metal string as a sensitive element. When the length of the string is determined, the change in its natural vibration frequency can indicate the magnitude of the tension on the string. The frequency and the receiving force can be obtained through a ce...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/16G01L1/12H02J7/35E02D5/04E02D5/10E02D17/04G08C17/02G08C19/30H04L29/08H04W4/80
CPCE02D5/04E02D5/10E02D17/04G01B7/16G01L1/127G08C17/02G08C19/30H02J7/35H04L67/025H04L67/12H04W4/80
Inventor 李建国应继伟焦迪殷建国汪邦运
Owner SHANGHAI FUTURE INTELLIGENCE TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products