Dead weight force standard machine
Used for force sensor, weighing sensor, force meter detection and
JJG734 "force standard machine", JJG144 "standard dynamometer"
1, the use of weights for direct loading, improve the accuracy of
the whole machine;
2. The load drive of the force value adopts worm reducer and ball
screw drive to ensure the accuracy and reliability of the drive,
low noise and smooth operation;
3. Use displacement sensor as force series control, more accurate
4. It has the creep verification function of the sensor;
5. Special measurement and control software, full automatic control
of loading and unloading, automatic completion of loading and data
collection and processing.
3. Adopted technology
3.1 Dead weigth
Dead weight is the core of the force standard machine, the success
of its design directly affects the accuracy level of the whole
machine, the design requirements for weight mainly have the
weights of permutation and combination, according to the design
requirements to achieve a 100, 200, 300, 500, 1000 n do weight
combination, frame part as a level 1 load processing, to this end,
we elaborate design of weights of permutation and combination, meet
the requirements of the force magnitude, to avoid the reverse load
phenomenon appeared in the process of unloading.
weights hang, positioning way.Adopt the way of 3 connection plug
and middle conical positioning.
weight material.Selection of 304 stainless steel weight,
degaussing treatment, stable and reliable, not adhesion.
used farmar exchange patent technology.
farmar quality accuracy requirements.When the weight is designed
and processed, a precision balance is used to weigh it in the
adjustment chamber of 120 degree uniformity, so as to ensure that
the extended uncertainty of the weight is within 0.003% (R=3).
3.2 electronic control and computer
3.2.1 principle: the lower computer adopts programmable logic
controller (PLC), and the upper computer (PC) communicates with the
PLC through the serial communication port, and connects with the
acquisition instrument through the serial communication port to
collect the data of the sensor under test;PC issue instructions to
the machine (PLC) loading or unloading, according to the
verification regulation of test sensor (such as GB7551-2001), to be
load, send instructions by PLC, PC for data collection, according
to the verification procedures to complete the verification
process, data collection and processing by PC, print the report,
and save the data in accordance with the demand.
|Accuracy||±0.01% / ±0.03%|
|Repeatability||0.01% / 0.015%|
|Working table level||0.3/1000|
|Compression space (mm)||280x300||300x500||400x800||500x80|
Length x Width x Height