Overview
The vibrating wire rebar strain meter mainly consists of a load-bearing round steel bar, a string clamp, an induction coil and a high-strength steel wire. The excitation circuit drives the sensor coil. When the frequency of the excitation signal approaches the natural frequency of the steel string, the steel string quickly reaches resonance. After the excitation signal is removed, the steel string continues to vibrate at its natural frequency for some time. The monitoring circuit of the acquisition instrument filters, amplifies and shapes the induced signal produced by the vibration and then acquires it. By measuring the pulse period of the induced signal, the vibration frequency of the string can be determined. The internal structure is shown in Figure 2-1.
Figure 2-1 Internal structure of the rebar strain meter
Key Features
- 1. Uses imported steel string with stable temperature performance, long service life and good product consistency;
- DB9 female connector (socket), RS232 level (can be connected directly to the level of a computer serial port)
- 3. Designed to the IP68 standard with excellent waterproof performance;
- 4. Uses standard hydraulic cable, making the system more reliable.
- Beijing Chengan Online Technology Co., Ltd.
