Monitoring system

A monitoring system captures, evaluates, and documents technical and environmental conditions on the construction site and directly at the tool. In concrete demolition, special demolition, rock excavation, tunnel construction, natural stone extraction, and special applications, it provides the foundation for safe processes, reproducible quality, and robust proof of performance. Especially with hydraulically powered tools – such as concrete demolition shears or rock and concrete splitters – structured monitoring supports precise control of forces, pressures, and movements and helps protect the building fabric, equipment, and surroundings. In addition, it creates a transparent data trail for audits, claims management, and post-job analysis.

Definition: What is meant by a monitoring system?

A monitoring system is the ordered whole of sensing, data acquisition, evaluation, display, and alarming that records technical processes and environmental conditions continuously, event-driven, or at defined intervals. The objectives are early detection of deviations, control of thresholds, and documentation for quality assurance, occupational safety, and environmental compatibility. Such a system can be arranged locally at the tool, at the power unit, on the structure, or in the surroundings and serves the condition monitoring of work equipment, structures, and environmental effects. Depending on the project, processing can take place at the edge with local storage and rapid feedback, and be mirrored to a central platform with secure access and retention rules.

Tasks and benefits of a monitoring system in demolition and extraction

In combination with tools such as concrete demolition shears, rock and concrete splitters, combination shears, steel shears, multi cutters, tank cutters, rock splitting cylinders, and the associated power units, a monitoring system performs key tasks:

• Safety: Compliance with load, pressure, and vibration limits; protection of personnel and surroundings through interlocks and safe states.
• Quality: Verifiable, repeatable results when separating, splitting, or cutting; controlled crack formation in concrete or rock supported by clear thresholds.
• Availability: Early detection of wear and deviations to avoid downtime; initiation of preventive and predictive maintenance measures.
• Documentation: Complete, tamper-evident records of measurements for site management, subcontractors, and authorities.
• Environment: Limitation of noise, dust, and vibrations in urban areas as well as protection of adjacent structures with traceable evidence.
• Efficiency: Shorter setup and changeover, fewer reworks, and optimized energy use based on data-supported adjustments.

Typical components of a monitoring system

Depending on the task and area of application, proven assemblies are used:

• Sensing: Pressure and temperature sensors on the hydraulic hose line, displacement and force transducers on cylinders and shears, vibration sensors on structures (e.g., PPV-capable), microphones for sound levels, particle sensors for dust (e.g., PM10/PM2.5), humidity and gas sensors for special scenarios.
• Acquisition unit: Data logger or evaluation unit with an appropriate sampling rate, precise time-stamping, storage with buffered power, and a rugged housing for harsh site conditions.
• Displays and alarms: Visual and acoustic signals, threshold displays, logs with clear color coding and role-appropriate views.
• Power supply: Mains, battery, or hydraulically coupled power supply, depending on mobility and runtime requirements.
• Interfaces: Analog or digital inputs for sensors; standardized, secure handover to site management or machine control systems.
• Data integrity and synchronization: Checksums for data integrity, access control, and a reliable time base (e.g., GNSS or NTP) for correlation across measuring points.

Relevant measurands for hydraulic splitting and cutting operations

For targeted monitoring of concrete demolition shears and rock and concrete splitters, the following measurands are particularly relevant in practice:

• Hydraulic pressure and flow rate: Decisive for available splitting and cutting force as well as the speed of the operation; monitoring of peak and average values prevents overloads.
• Oil temperature: Indicator of load, energy input, and efficiency of the hydraulic system; trending supports early cooling or filtration measures.
• Stroke and displacement measurement: Control of cylinder movement, detection of blockages or asymmetric loading, and validation of cycle times.
• Force or stress measurement: Assessment of actual gripping, cutting, or splitting forces as a basis for comparing target and actual values.
• Vibrations: Protection of adjacent structures, compliance with limits in the surroundings; typical descriptors include peak particle velocity and RMS velocity.
• Noise and dust exposure: Guidance for emission reduction measures in urban areas; typical metrics include equivalent continuous sound level and particle fractions.

Integration into products and workflows

An effective monitoring system integrates into the work process without hindering it. For concrete demolition shears, pressure and displacement detection can take place directly on the cylinders and lines. For rock and concrete splitters, pressure sensors on the splitting cylinders and displacement transducers on the wedges provide valuable indications of material behavior, friction, and splitting progress. Hydraulic power units are monitored with temperature and flow sensors to ensure a consistent energy supply. The display of threshold violations is clearly visible at the work area or at a central operating point. Non-invasive mounting, protected cable routing, and quick-release sensor brackets reduce setup time and increase reliability; alarm concepts (e.g., traffic-light visualization) support rapid decisions on site.

Specifics by application area

Concrete demolition and special demolition

In the deconstruction of load-bearing components, vibration and crack monitoring support the protection of the remaining structure. Concrete demolition shears benefit from precise force and pressure control to set demolition edges deliberately and limit loading into adjacent components. Where residual load paths are critical, baseline measurements and reference phases improve comparability.

Strip-out and cutting

In selective separation, clean cut edges and low emissions are important. Monitoring of oil temperature, noise emission, and dust supports process stability. Combination shears and multi cutters are tuned to efficient cutting sequences via stroke and pressure signals. Peak detection prevents local overheating and preserves cutting tool life.

Rock excavation and tunnel construction

Here, control of vibrations, gas releases, and humidity plays a central role. Rock splitting cylinders and rock and concrete splitters require a precise pressure ramp; displacement and force measurements indicate early on whether splitting wedges are seating correctly. Gas and ventilation monitoring adds a further safety layer in confined spaces and during breakthrough operations.

Natural stone extraction

To preserve block quality, the splitting force is finely dosed. Monitoring wedge movement, pressure profile, and micro-vibrations helps steer crack paths and minimize material losses. Consistent documentation of pressure ramps and pause intervals improves reproducibility across benches and blocks.

Special applications

With tank cutters, steel shears, or in sensitive areas, the combination of temperature, gas, and spark monitoring increases safety. Documented measurement series support the release of individual work steps. In addition, zone classification and permit-to-work processes can be underpinned by threshold logs and event markers.

Planning and implementation of a monitoring system

Planning begins with a clear definition of objectives: Which risks should be controlled, which proofs provided? Building on this, measurands, sensor positions, and thresholds are defined. For concrete demolition shears and rock and concrete splitters, a prioritized selection is recommended: hydraulic pressure, oil temperature, and displacement are often the most informative values. Responsible parties place vibration sensors at critical points of the surrounding structure. Commissioning includes a functional test and, if required, calibration. Responsibilities, access rights, and data retention periods are documented in a concise monitoring plan with acceptance criteria and fallback procedures.

Data evaluation, alerting, and documentation

A good data strategy makes the system effective:

1. Capture: Adequate sampling rate, unambiguous time base, clear measurement point labels.
2. Evaluate: Trend analysis, comparison with reference phases, plausibility checks.
3. Alert: Multi-stage warning and shutdown concepts with defined response paths.
4. Document: Logs with measurements, events, and actions; traceable and audit-proof.

Typical evaluation focuses on concise KPIs such as maximum hydraulic pressure per cycle, equivalent continuous noise level, peak particle velocity, cycle times, and temperature gradients. Edge analytics can suppress false positives, while annotations in the logbook secure context for later review.

Calibration, care, and operation

Periodic checks are necessary for reliable results. Pressure sensors on hydraulic hose lines are verified using reference gauges, displacement transducers are verified via reference strokes. Visual inspections ensure sensors are secure and cables are routed with protection. Dust and noise sensors require scheduled cleaning and functional checks. Measurement intervals and test cycles depend on intensity of use and environmental conditions. Calibrations are performed traceably with certificates, and zero-offset or drift is documented to maintain measurement confidence over the project duration.

Typical deviations and countermeasures

• Unexpected pressure spikes: Check for line constrictions, air in the system, or changed material properties; adjust the working method.
• Rising oil temperature: Check cooling, flow, and filters; reduce continuous load.
• Noisy vibration signals: Check sensor mounting, isolate interference sources, relocate measuring points.
• Deviating displacement measurement: Adjust displacement transducers, check for play or cylinder tilting.
• Sensor drift or zero offset: Recalibrate, verify reference values, and review thermal influence or aging.
• Time base inconsistencies: Synchronize clocks, verify GNSS or NTP availability, and align event markers across devices.

Safety, occupational safety, and environment

A monitoring system supports compliance with technical rules and regulatory requirements. Limits for vibrations, noise, and dust are defined on a project-specific basis and monitored as a precaution. Legal requirements may vary by project and location; careful coordination with the responsible bodies is advisable. Documented monitoring facilitates approvals, reduces liability risks, and contributes to the protection of employees, residents, and the building fabric. Baseline surveys and post-measurement reports strengthen transparency toward stakeholders and authorities.

Future topics: condition-based maintenance and remote monitoring

With connected sensing, tools and power units can be operated on a condition-based basis. Data series yield indicators that point early to wear or misalignment. For concrete demolition shears and rock and concrete splitters, this means planned maintenance, more efficient deployment planning, and more stable process quality – especially advantageous with varying materials and confined construction sites. Edge analytics, remote diagnostics, and digital logbooks reduce service visits and enable consistent knowledge transfer between projects.

Practical checklist to get started

1. Define objectives: safety, quality, environment, or a combination.
2. Select measurands: pressure, temperature, displacement, vibration, noise, dust.
3. Define sensor positions: tool, power unit, structural surroundings.
4. Agree limits and responses: warning, stop, root cause analysis.
5. Plan documentation: measurement intervals, log structure, responsibilities.
6. Set calibration and care: test cycles, visual inspections, cleaning.
7. Define data retention and access: storage location, duration, roles, and encryption.
8. Train operating personnel: interpretation of displays, alarms, and response paths.
9. Evaluate experience: identify trends, adapt measures, secure knowledge.