Static vs Dynamic Pressure Mapping
Classify how the contact changes over time before selecting the sensor matrix, reader, recording duration and analysis workflow.
Static pressure mapping examines a stable or sustained contact condition, while dynamic pressure mapping records how the distribution changes during an event. The choice affects acquisition rate, matrix and channel compatibility, recording duration, trigger method, synchronization and output. “Dynamic” is not one fixed specification; the required system depends on the event and the spatial detail needed.
Classify the event before choosing hardware
Static
A static test observes a condition after the load has stabilized: for example, an assembled interface under a maintained fixture load. The workflow may emphasize repeatable placement, a controlled hold point and comparison of distributions.
Quasi-static
A quasi-static event changes slowly enough that selected stages can be reviewed as the load increases, decreases or moves. The important question is whether the change must be recorded continuously or compared at defined steps.
Dynamic
A dynamic test follows a changing contact during motion, cycling or operation. The reader must acquire the matched sensor matrix at a rate appropriate to the features being studied, for a recording duration that captures the event.
Transient
A transient is a short event or brief contact feature whose timing may be uncertain. Triggering, pre-event context, synchronization and data volume become important. A “high-speed” label alone does not establish that a configuration will capture the required phenomenon.
Event timing changes the complete measurement chain
Sensor matrix and spatial requirement
The array must fit the interface and resolve the feature of interest. A larger or denser matrix can increase the amount of information acquired per scan. The spatial requirement therefore influences the practical acquisition and recording plan.
Reader and acquisition rate
The reader must support the connected matrix, channel arrangement and required time behavior. Available acquisition rate depends on the connected sensor matrix, channel configuration, recording duration and test setup.
Software and output
A static review may need a representative map and controlled comparisons. A dynamic study may require a sequence, time history, synchronized context or export of supported measurements. Confirm the required output rather than assuming every configured system provides every analysis function.
Static and dynamic decision table
| Test condition | Primary question | Acquisition consideration |
|---|---|---|
| Maintained assembly load | Is the distribution acceptably uniform at the defined hold point? | Stable placement and controlled comparison may be more important than speed |
| Slow compression ramp | How does the footprint evolve between load stages? | Define stages, ramp duration and whether continuous recording is needed |
| Repeated mechanical cycle | Does the distribution change between cycles? | Confirm cycle rate, recording window and repeatable trigger |
| Moving contact | Where and when does the contact region move? | Balance spatial matrix, time behavior and recording duration |
| Brief impact-like event | Can the event and its peak region be captured? | Trigger, time resolution and event duration require joint review |
| Production monitoring | What output or signal must be available in the process? | Representative integration, interface and workflow must be confirmed |
Loading, trigger and synchronization matter
The same object can produce different maps when fixture stiffness, alignment, preload, protective layers or loading sequence changes. Document how the load is applied and whether the event begins from a preloaded condition. For repeatable comparisons, use consistent placement references and record setup changes.
Trigger strategy
A manually started static recording is different from a short event that needs a repeatable trigger. Describe what signal or physical action marks the event, whether pre-event information matters, and how much post-event recording is required. Do not assume an external trigger or integration interface is included until it is confirmed for the representative configuration.
Synchronization
If the pressure sequence must be related to a machine state, video, force signal or other data, state the timing requirement. Compatibility and synchronization options must be reviewed; they should not be inferred from a generic software or reader description.
Data volume and interpretation
Long recordings, dense matrices and rapid acquisition can create substantial data. Select a recording window that answers the engineering question. More frames do not compensate for poor placement, unsuitable range, missing spatial coverage or an uncontrolled fixture.
What to provide for a static or dynamic review
- A plain-language description of the contact event.
- Whether it is sustained, slowly changing, repeated or short-duration.
- Expected event duration, cycle rate and timing uncertainty.
- Interface dimensions, shape and required spatial feature.
- Expected loading, preload and pressure window.
- Sensor placement, fixture and cable-routing restrictions.
- Required live view, recording, sequence, curve, comparison or report.
- Trigger, synchronization and process-interface requirements.
- Environment and intended test duration.
The pressure distribution applies to the tested arrangement and conditions. It does not by itself establish safety, life, quality, process capability or final product performance.
Related products and resources
Define the event before choosing acquisition
Share timing, matrix, fixture and output requirements for configuration review.
Review application evaluation