GB/T 36668.2-2018 English PDF (GBT36668.2-2018)

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GB/T 36668.2-2018: Condition monitoring and fault diagnostics of amusement device -- Part 2: Acoustic emission monitoring method
GB/T 36668.2-2018
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 97.200.40
Y 57
Condition monitoring and fault diagnostics of amusement
device - Part 2. Acoustic emission monitoring method
ISSUED ON. SEPTEMBER 28, 2018
IMPLEMENTED ON. APRIL 1, 2019
Issued by. State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 5 
4 Method overview ... 5 
5 Safety requirements ... 8 
6 Personnel requirements ... 8 
7 Equipment and apparatus requirements ... 9 
8 Monitoring process specification ... 10 
9 Monitoring methods ... 11 
10 Evaluation and grading of monitoring results ... 15 
11 Fault diagnostics ... 16 
12 Maintenance strategies ... 17 
13 Records and reports ... 17 
Appendix A (Normative) Acoustic emission system performance requirements
... 19 
Condition monitoring and fault diagnostics of amusement
device - Part 2. Acoustic emission monitoring method
1 Scope
This Part of GB/T 36668 specifies the method of operating condition monitoring
and diagnostics of rotating components of amusement device using acoustic
emission technique and the evaluation and grading of the results.
This Part applies to condition monitoring and fault diagnostics of rotating
components of newly-manufactured and in-use amusement device.
2 Normative references
The following documents are indispensable for the application of this document.
For the dated references, only the editions with the dates indicated are
applicable to this document. For the undated references, the latest edition
(including all the amendments) are applicable to this document.
GB/T 9445 Non-destructive testing - Qualification and certification of NDT
personnel
GB/T 12604.4 Non-destructive testing - Terminology - Terms used in acoustic
emission testing
GB/T 19800 Non-destructive testing - Acoustic emission inspection - Primary
calibration of transducers
GB/T 19801 Non-destructive testing - Acoustic emission inspection -
Secondary calibration of acoustic emission sensors
GB/T 20737 Non-destructive testing - General terms and definitions
GB/T 20921 Condition monitoring and diagnostics of machines - Vocabulary
GB/T 34370.1 Nondestructive testing of amusement equipments - Part 1.
General requirement
GB/T 34370.2 Nondestructive testing of amusement equipments - Part 2.
Visual examination
GB/T 34370.3 Nondestructive testing of amusement equipments - Part 3.
a) vulnerable to attenuation;
b) vulnerable to high operating background noise;
c) failure to correlate monitored acoustic emission defect characteristics with
accurate fault mechanism.
4.4 Interference factors
Before performing acoustic emission monitoring, it shall be aware of potential
sources of noise, such as electronic noise (electromagnetic and radio frequency
interference), airborne noise (air leakage or impact of grains of sand in a windy
environment), operating background noise (fluid flow in the tube), and
mechanical background noise. Their presence may affect the acoustic emission
monitoring results.
5 Safety requirements
This Clause does not list all of the safety requirements for implementation.
Users using this Part shall, before implementation, establish safety criterion.
Safety requirements during implementation are at least as follows.
a) The monitoring personnel shall abide by the safety requirements for the
on-site operation of amusement device. The personnel at the monitoring
location are required to wear protective overalls and wear relevant
protective equipment;
b) It shall pay attention to the temperature condition of the device being
monitored, to avoid scalds;
c) During the monitoring, attention shall be paid to the movement of car
during the start and operation of amusement device, to prevent personnel
from colliding and obstructing the connection of cable;
d) When operating at high altitude, factors such as the fall of personnel,
monitoring equipment and apparatus shall be considered. Necessary
protective measures shall be taken.
6 Personnel requirements
Personnel who use this Part for monitoring shall, in accordance with the
requirements of GB/T 9445 or the regulations of the relevant competent
department, obtain the grade qualification certificate of acoustic emission
testing and monitoring issued or recognized by the corresponding agency for
8 Monitoring process specification
8.1 General monitoring process specification
Organizations engaged in acoustic emission monitoring shall, in accordance
with the requirements of this Part, develop general acoustic emission
monitoring process specification. Its contents shall include at least the following
elements.
a) scope of application;
b) referenced standards and regulations;
c) qualifications of implementers;
d) monitoring instruments and equipment. coupling agent, sensor, sensor
fixture, signal line, preamplifier, cable, instrument host, monitoring data
acquisition and analysis software, etc.;
e) information about the device and components being monitored. name,
type, number, structural style, dimensions, installation location, design
and operating parameters;
f) installation position and installation mode of sensor;
g) operating conditions and timing of monitoring;
h) sensitivity measurement;
i) monitoring process and data analysis and interpretation;
j) evaluation of monitoring results;
k) monitoring records, reports, and data archiving;
l) personnel of development, review, and approval;
m) date of development.
8.2 Monitoring work instruction or process card
For each monitored component or each set of monitored devices, in
accordance with the requirements of 8.1, acoustic emission monitoring work
instruction or process card shall be developed.
monitoring process specification, the acoustic emission monitoring work
instruction or process card shall be developed, to determine the location and
surface conditions of the installation of acoustic emission sensor. At the same
time, the monitored device is surveyed; the monitored positions are numbered;
and the structural schematic diagram of the monitored device is drawn. Without
affecting the monitoring, the sensor shall be installed as close as possible to
the rotating component.
9.2 Baseline setting
Baseline data are mainly used to compare against subsequent measured
values, to find changes in the monitored object. The determination of baseline
data shall accurately specify the initial stable working conditions of amusement
device. Baseline data shall be obtained under normal operating condition of the
device. For the device with multiple operating conditions, a baseline shall be
established for each condition.
For new and overhauled devices, changes in measured values during the first
few days or weeks of operation are usually observed. Therefore, before
baseline data are collected, run-in time shall be specified.
For device which has been running for a long time and is monitored for the first
time, its baseline can be used as a reference point for device stabilizing.
9.3 Installation of sensor
The installation of sensor shall meet the following requirements.
a) According to the sensor installation position determined by the schematic
diagram, install the sensor;
b) The installation position of sensor is sur...