Crack monitoring in buildings

The problem

Cracks appear after earthquakes or as buildings age, and the same question comes up every time: are they dangerous? You can't answer that by looking, only by following them over time. An engineer can't visit every building weekly and measure cracks with a ruler. Jordan sits in a seismically active area with many old buildings. Continuous measurement turns personal judgment into data.

How it works

1. MountingA displacement sensor is mounted across the two sides of the crack to measure the distance between them.
2. MeasurementThe system reads the displacement with high precision at regular intervals.
3. Thermal compensationThe temperature reading separates the material's natural expansion from the crack's real widening.
4. Trend detectionThe system calculates the rate of change over weeks, not in a single moment.
5. Vibration monitoringThe vibration unit records any tremor the building experiences.
6. AlertsWhen the widening rate exceeds the set limit, an alert is sent to the responsible engineer.

Project features

• It answers the key question: is the crack widening or stable?
• It separates thermal expansion from real widening — an engineering detail that shows depth of understanding.
• It ties into the Jordanian context: a seismically active region with many old buildings.
• A unit costs far less than periodic engineer visits.
• It can expand to cover several points in the same building.

Expected challenges

These are the main obstacles to expect during the build, laid out clearly so you know them before you start.

• The required precision is very high: change is measured in micrometers.
• Thermal expansion causes a daily change larger than the crack's real widening.
• The sensor must be mounted firmly on the wall, or it becomes a source of error itself.
• Sensor drift accumulates over time and distorts long-term readings.
• Moisture and dust on the crack affect measurement accuracy.

The consultation gives you a solution for each one.

Expected committee questions

Prepare your answers in advance: these questions come up often in defenses of similar projects.

1. How is crack width measured in micrometers, and which sensor is used?
2. How is natural thermal expansion separated from real widening?
3. What widening rate is considered dangerous?
4. How is the sensor fixed to the wall without affecting the reading?

Practice the defense, question by question