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Calibration & Maintenance

A capability chain built around production processes and maintenance grading,
calibration, verification-bench testing, and quality record management.

Assurance Overview

A support system from production flow to maintenance grading

Accuracy Assurance

A complete chain covering production, maintenance, calibration, and verification

SRM has established a structured process for the integrated continuous gyro system covering mechanical pre-assembly, component inspection, circuit welding, sensor screening, integrated commissioning, maintenance grading, three-axis turntable calibration, and verification-bench testing to support equipment accuracy and long-term stability.

  • Progressive verification from components and short sections to the full system and software stability
  • Standard execution from maintenance triggers to graded maintenance work
  • Closed-loop quality management from calibration and verification to ERP records
Grading
Executed by equipment condition and inspection results
20 Wells
Entry condition for maintenance after the test-well threshold
24 h
Reference duration for sensor stress screening
3 s accuracy
Calibration-table installation accuracy requirement

Production Flow

Key production and inspection processes

Electronic component inspection, screening, and parameter testing.
Mechanical pre-assembly, short-section assembly, and final integration.
Integrated commissioning, thermal testing, and closed-loop checks.

Mechanical & Structure

Pre-assembly and structural checks

Fastener dimensions, structural appearance, tightening torque, thermal-flask assembly, and electronics housing fit are checked to meet process requirements.

Circuit & Parameters

Welding, energization, and parameter tuning

Work includes solder quality checks, short-circuit inspection, power-on testing, ripple control, and tuning of drive amplification and rebalance loops.

Sensor & System

Screening, assembly, and functional testing

Sensor zero checks, repeatability tests, stress screening, short-section assembly, threshold and bandwidth tuning, and integrated system testing are performed.

Maintenance Mechanism

Maintenance triggers and four-level repair system

Trigger Conditions

Main cases that enter the maintenance flow

  • Functional abnormality or component damage
  • More than six months since shipment
  • More than 20 tested wells
  • Measurement-accuracy degradation

Process Composition

Verification-bench testing and maintenance reporting in parallel

  • Return cause description and appearance inspection
  • Power, communication, acquisition, drive, and sensor checks
  • Verification-bench testing, calibration verification, and vibration-data download
  • Maintenance report generation and quality records

Level 1

Basic maintenance and accuracy verification

Covers appearance inspection, functional checks, insulation testing, and north-seeking accuracy verification.

Level 2

Internal checks and high-temperature testing

Adds O-ring and anti-counterfeit label maintenance, internal component checks, high-temperature tests, and north-seeking calibration.

Level 3

Repair and structural wear inspection

Covers housing maintenance or replacement, internal repair, functional-part maintenance, and where necessary north-seeking calibration or gyro-sensor replacement.

Level 4

Core-board and sensor replacement

For heavy maintenance involving new housing frames, power, communication, acquisition, and drive-board replacement, plus gyro-sensor replacement.

Calibration & Verification

Three-axis turntable calibration and verification-bench testing

Validation Loop

A closed loop from calibration to accuracy verification

  • Mount the gyro sensor and electronics on a high-precision electric three-axis flight turntable
  • Complete zero and span calibration, performance acquisition, and model establishment
  • Use the verification bench to validate system accuracy and continuous survey capability
  • Test the software system, surface unit, and communication gain range
  • Fill out test forms, organize records, and manage them through the ERP system
Turntable Calibration Verification Bench Model Building ERP Records

Image Gallery

Calibration, Maintenance, and Testing Environment

Marking, north-reference setup, temperature cycling, turntable calibration, software commissioning, and north-seeking operation environments.

Laser marking equipment and component identification workflow.
Laser marking equipment and component identification workflow.
Motorized three-axis turntable for gyro sensor attitude calibration and accuracy verification.
Motorized three-axis turntable for gyro sensor attitude calibration and accuracy verification.
North-reference mirror used to establish north reference and calibrate the motorized three-axis turntable.
North-reference mirror used to establish north reference and calibrate the motorized three-axis turntable.
Temperature cycling test chamber for environmental adaptability verification.
Temperature cycling test chamber for environmental adaptability verification.
GYRO software commissioning and parameter monitoring environment.
GYRO software commissioning and parameter monitoring environment.
Gyro north-seeking and sensor verification operation.
Gyro north-seeking and sensor verification operation.

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