Reuben Hale, P.E.
Ph: (510) 507-1300
Response Dynamics Vibration Engineering Inc. provides professional construction vibration monitoring services for the construction industry. We provide remote and on-site monitoring that can be customized for the needs of each unique construction and/or demolition project. Vibration and acoustic noise monitoring is often required under many local, state, and federal regulations. As part of our construction vibration monitoring services, we guide our clients through these laws and codes, evaluate our clients needs given the project plan, provide training where necessary. The project can then proceed forward as efficiently and aggressively as possible while meeting the project requirements.
We also setup monitoring equipment for commercial property owners to help protect them from incurring damage from undocumented levels of ground motion when a potentially aggressive construction or demolition project is planned to occur near the property.
From a practical standpoint, vibration monitoring is often prudent for both the contractor and neighbors affected by the project. Complaints from neighboring facilities and residences can bring construction to a standstill. Accusations of vibration induced settling and/or damage can be costly and time consuming. Monitoring ground or structure vibration provides an independent objective measure of the sound and vibration levels. Starting a project with vibration and acoustic noise monitoring in place shows the concerned parties that their needs are an important part of the planning process.
We use dedicated construction vibration monitoring equipment capable of logging ground motion and acoustic noise for extended periods. The vibration monitoring equipment is available with remote operation, downloading capability, triggered alarms, text messaging and email alerts. Large vibration and acoustic event triggers can be set to industry standard thresholds, or to any arbitrary trigger level, to capture the vibration and acoustic noise disturbance.
Stand Alone Sound Level Monitoring - When acoustic noise is the primary concern, we provide Acoustic Monitoring Services that involve logging sound level meters that perform triggered event capture as well as characterizations in the time and frequency domain, and statistical summaries.
Response Dynamics offers two systems for construction vibration monitoring:.
- Compact Construction Monitoring system - This compact system monitors vibration and acousting noise using a three axis geophone for X, Y, and Z vibration velocity, with an external remote microphone and windscreen that is located separately. This system is compact, cost-effective, and will continuously log, capture transient events that exceed user defined trigger levels, send alert texts and emails, and report vibration levels in the correct format to compare with standards for assessing risk of structural damage. Detailed reports can be downloaded that include plots of peak particle velocity as a function of frequency with a comparison of the widely accepted standards developed by the mining industry, and OSMRE, to asses when structural damage is likely. Multiple systems are often used together to monitor large projects. This compact system is battery or line powered and can be unattended for many days or weeks with remote operation.
- Response Dynamics VMS1 Vibration Monitoring System - The VMS1 is a very powerful monitoring system suited for challenging projects with unique requirements. Response Dynamics has been developing VMS1 Vibration Monitoring System for over two decades to efficiently gather the data our clients need. The VMS1 offers a continuous characterization of the environment that can be reported in a concise and meaningful manner, allowing us to move though time, space, frequency, and amplitude with ease. We can find the "needle in the hay stack" immediately.
The VMS1 continuously monitors the signals from vibration, acoustics noise, magnetic field, or any other sensor, while performing spectral analysis, logging events, compiling statistics, and setting off various alarms that alert the team (via text, email, and/or flashing lights and sirens) that the environmental parameters exceed client thresholds.
Reuben Hale first developed the system to monitor vibration, acoustic noise, and other signals, for the semiconductor industry during the fab construction boom in the early 1990's. The system developed not only as a monitoring and vibration alert tool, but as a trouble-shooting and characterization tool. The system has been refined and has evolved to be a one of a kind, state of the art monitoring system that will collect thousands of measurements and yet provide you with the power to see exactly where, when, and how your facility is disturbed with a few key strokes. There is no system like it in the world. Some of the system attributes include:
- Capable of measurement of Ultra-low vibration levels for high resolution sensitive equipment and processes
- Custom frequency dependent thresholds that can be set in any units over standard, or user specified, frequency bands
- Time domain custom thresholds and alerts
- Unlimited measurement channels
- Custom Function Channels that may depend on multiple channels and parameters
- Custom text and email alerts
- Capture, Trend, Sort
- Spectral Analysis with custom filtering, spectral resolution, and bandwidth
- Powerful Statistical Analyses and post processing for the concise characterization of the environment as well as all problematic events.
This monitoring system was developed for custom applications where our clients have manufacturing tools, processes, or systems with unique time and frequency dependent sensitivities. Response Dynamics developed the first VMS1 monitoring system in the early 1990s in response to a need in the semiconductor industry to monitor the vibration, acoustic noise, and magnetic field levels in their semiconductor fabs to insure that their processes were not being disturbed as the facility sites continuously changed with new equipment and greater facility demand. The VMS1 system has continued to evolve over the last two decades.