This part of GB/T8910 specifies the basic technical requirements for the vibration measurement of the handle of a hand-held portable power tool. This part is applicable to the vibration measurement of the handle of a hand-held portable power tool. This part is not applicable to the assessment of vibration felt by the human body. The measurement and assessment of hand-transmitted vibration felt by the human body in the workplace is given by GB/T14790. GB/T 8910.1-2004 Hand-held portable power tool handle vibration measurement method Part 1: General GB/T8910.1-2004 Standard download decompression password: www.bzxz.net

IC: 13. 160:25. 140. 01
National Standard of the People's Republic of China
GB/T 8910.1—2004/1SO 8662-1:1988 Generation of GB8101988
Hand-held portable power tools
Measurement of vibrations at the handle-Part 1: General
(ISO 8562-1:1998, IDT
2004-06-09 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China and Administration Commission of Standardization of the People's Republic of China
2004-12-01 Implementation
: B/T 8910.1—2004/SO 8662-1:198810 The method for measuring vibration of portable power tools is divided into the following parts) Part 2: General: Part 3: Rock drills and rotary hammers; Part 4: Grinders; Part 5: Road breakers and construction engineering tools; Part 6: Impact, pulse, filter wheels, screwdrivers and drying tools; Part 7: Polishers and rotary polishers; Part 8: Fixing machines; Part 9: Building cement machines; Part 10: Punching and polishing machines; Part 11: Nailers!
- Part 12: Belt targets and projectiles, swing-type targets and transferable devices: Part 13: Grinding machines for use:
- Part 14: Mining tools and measuring instruments. This part is Part 1 of GB3911. It corresponds to 158062-1:19 Hand-held low-change tools with only handles for measuring methods Part 1: General principles (in English version), the degree of consistency is the same. This part is similar to the international standard in technical content, and the following is the editing and acceptance:
Except for the preface of 2662
According to the provisions of GB1.1206, some of the notes in the international standard are changed to the relevant provisions of this part: This part is different from GT.1-19 as follows: Except for the elimination of the international standard and the appendix:
Added the introduction
The standard name is adjusted to be consistent with the international standard name, this part This part is proposed by China Machinery Industry Federation. This part is under the jurisdiction of the National Pneumatic Tool Standardization Technical Committee (SA173). The drafting unit of this part is Dashui Rock Machinery Pneumatic Tool Research Institute. The drafters of this part are Wei Wanjiang, Su Wei and Zhu Gouhui. The previous service information of the standards replaced by this part is: GB3310.11988
1 Scope
GB/T8910.1-2004/IS0 8662-1:198B Hand-held portable power tools: Test method for handle vibrations Part 1, General This part of B specifies the basic requirements for the vibration measurement of hand-held portable power tools. This part is applicable to the measurement of vibrations of hand-held portable power tools. This part does not apply to the measurement or assessment of human vibrations in workplaces. 2 Normative references The following documents shall apply to the provisions of this part. For any referenced document with a specified date, all subsequent amendments (excluding those included in the revision) or revisions shall not apply to this part. However, the parties who have reached an agreement based on this part shall be bound by this part. Study whether the latest version of these components is used. For any document not marked with an expiration date, the latest version shall apply to the wood part.
GB/T324: Frequency and fractional-range oscillators (eg Y1HC, :250) GB/T13823 (all parts) Standard method for the detection of vibration and shock V[S0:47 (partial parts: G/T147 Mechanical vibration and shock recording and measurement of mechanical installation (eg V155315 GB/T14793 Human body vibration and shock measurement method (150534)) B:156-9 Mechanical vibration and shock standard (nenIS/I8u5) 1503041 Human body vibration and shock reaction measurement instrument 3 measurement and measurement
3. 1 Physical quantity
The vibration of the power tool is measured under the test conditions and is expressed by the mean square value 4, with the unit of ra/:. It can also be expressed by the following formula:
L20g()
Where:
L is the value of the acceleration, in decibels (l
—root mean square acceleration, in units of m/5) αa—reference acceleration -=16m/.
3.2 Frequency Analysis
The analysis should be performed in the 1/1 octave band with a central frequency of 8 Hz - 1000 Hz or in the 1/octave error band of 11 Hz - 1250 Hz.
In order to determine the validity of the weighted measurements (see 3, and 4, 3>), it is necessary to perform the frequency analysis in the 1/: octave band. For example, a high sub-normal frequency of the weighted values ​​in the cheek band may indicate the presence of non-linear effects. 3.3 Weighting Addition
The weights can be varied by 1S)814! The weighted wave specified in GB/T1479) can be used for measuring the virtual wave of the hand-held back alarm. The weighting coefficient specified in GB/T1479 can also be used to calculate 1/3 times the frequency band data. The two methods have different effects. In the continuous conversion of the curve, there are differences in the full-wave characteristics of the network, such as the network characteristics of the receiver, CBT8310.1-2004/1S08662-1:19884
4.1 Technical requirements for emotional devices
For measuring three-dimensional sensors, such as self-accelerometers, their use should be connected with a pre-amplifier library in accordance with the requirements of 1S3141. The quality of the sensor and its fixed parts should be less than ten times the quality of the whole machine, and not more than 5 times the quality of the whole machine including all components. When selecting the accelerometer, consideration should be given to internal factors such as the angular sensitivity (less than %), the ambient temperature range and the maximum run-out speed. In this case, especially when the sensor is installed on a vehicle made of non-metallic materials such as plastic or wheels (less than the same weight as the whole machine), the above specified 5% error may cause the measurement to be prohibited. In this case, the sensor with the smallest mass should be used as much as possible.
4.2. Determination of the sensor
If the total speed of the sensor and the machine are selected, the installation rate, the physical structure of the sensor, etc., refer to the other parts before (H/T1G). At any speed ratio, the sensor should be checked according to the manufacturer's instructions: Regarding the installation of the speed ratio, the sensor should be installed according to the manufacturer's instructions. GB II 441 regulations. There is a protective cover under the pressure. You can use a special portable head between the handles to complete the measurement. The joint should be made of a lightweight rigid metal plate. Attention should be paid to the quality of the connection. The size and shape of the sensor can obviously affect the transmission rate within the domestic transmission range. 4.3 Mechanical tensioner For impact work points, it is recommended to use the machine city together with the speed meter. If the mechanical erosion wave does not produce measurement errors, it is not necessary to stop using it. The sensor is not very important. Internal excitation, high-speed tracking within the city may be caused by false signals in the critical frequency range, for example, the periodic re-signal will affect the critical signal, which can cause measurement errors. The high-frequency components of the speedometer are reduced by the use of a recovery filter. If the machine signal is half-measured, it will be compatible with the quality of the speedometer, producing a response of 6.3H2--5kHz. The cut-off frequency of the mechanical filter should be no less than 1/5 of the resonance frequency of the speedometer: 4.4 Hz || tt || If the filter is used, the frequency band and the passband of the filter are consistent with (T4: 4 octaves and 1/4 octaves) /T31 current point 4.5 Weighting filter and RMS value rectifier If the weighting filter and RMS value of the direct detection method are used for measurement, they should meet the requirements of IS () 0:1. If the following method is used to obtain a single RMS: If the signal to be analyzed is completely off, or the value of the signal changes significantly with time, it is not possible to make a simple analysis. It is recommended to use an analysis method or an integrator with "linear integration" function. The former is recommended: When the signal is relatively stable or continuously changes over a period of time, the analysis of the noise analyzer should be performed through the time and the duration of the method. 4.6 Signal recording
In order to facilitate comparison, the signal should be recorded in an appropriate quantity. For any difference between the flat frequency and the center frequency of the vehicle, the error should be less than 1/: times the center frequency of the standard frequency or 1 times the center frequency of the frequency band. The auxiliary instrument
is used to measure the operation condition! The auxiliary instrument and the working conditions of the tool (electrical condition, power source, gas, speed, etc.) are specified in other parts of GB/T8910.
4.E Calibration
The whole measuring system (including the transmitter) should be calibrated (see M3041 and G/T138), 2
5 Measurement direction and position
5. 1 Measurement direction
GB/T8915.1-2004[5X)8662-1.1988 virtual use of the basic center mark system "determine the measurement direction if the main axis is in the main axis, then the measurement is carried out on the main axis. The specific main axis is specified in other parts of CBT12. If there is no main axis, the measurement should be carried out on all three lines.
5.2 Measurement position
The measurement position is 12 points or the extreme point of the hand. The typical work is The operating procedure should be detailed to obtain the corresponding reproducibility. The frequency sequence should be similar to the typical actual operating results. In order to obtain a suitable accuracy, there should be sufficient operation efficiency and the duration of each operation. The parameters of the soldiers are specified in the other parts of GB/T3910. In order to have better reproducibility, a simulation procedure is specified. The vibration generated by the operating source The degree of the actual operation is recorded in the steps.
6.2 Reverse riding parts
Measurement of the vehicle tools! Belt measurement, total fixed operation, continuous operation, for the power range calibrated by the small tool under test, such as rated self-pressure or air pressure, should remain unchanged during the test:
When measuring, the speed or impact frequency should be monitored: the speed of the vehicle tools is specified in GB/T0. 6.3 Working tools. Test pieces and working
Working tools used with the machine such as needles, sand Wheel, bar or station) test piece change working condition in / other parts of the work 91U should be noted that even if the size, shape, grinding and unevenness of the tool are slightly different: it will have a significant impact on the speed of the machine. If a complete test is used, its design structure should be detailed. 6.4 Operator
1. Its vibration is affected by operating behavior. Therefore, the operator should be skilled and properly operate the machine. Test general
7. 1 Reference standards
The report should give the relevant parts of the measurement aids and other relevant standards: 7.2 Special receivers
The receiver model and related specifications of the measuring instruments should be given. 7.3 Fixing of transducers
The measuring position, fixing method and measuring base force of the speed transmitter and the machine efficiency transmitter should be described. 2.4 Description of power tools and working tools
The description of power tools and working tools should be given. The description of new tools should include:
9 sentences, one: Www.bzxZ.net
GB/T8910.1—2004/1SO 8662-1,1988h
Type;
Operating conditions!
fs Quality:
The description of the operation shall include:
a) manufacturer;
b) type,
=) model;
e size;
f) quality
When there is a protective cover, it shall be stated,
7.5 Operational stress
The operating conditions shall be in accordance with the provisions of G/Other parts 7.6 Signal processing
The signal integration type on the analyzer and the determination of the weighting method shall be the standard method 7.7
Additional technical requirements
Details of the measurement auxiliary bones such as size, type and installation of the test piece shall be given. Results
The results shall be based on the 1-weighted network. For tools, when specified in G13/T8915: 1/1 octave band substitution values ​​are also given.
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