UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Strain-Gauge Load Cell with Floating Piston: Ruge, 1949
Arthur C. Ruge of Cambridge, Massachusetts, one of the two inventors of the bonded wire strain gauge, patented this load weighing cell in 1949, US 2,472,047 (filed 1946). Tanks, bins and scales rest on such cells so the weight of their contents can be read at any time. A floating piston, held in a heavy shell by two diaphragms, passes the load straight down onto a column carrying bonded strain gauges, so tilted, off-centre and twisting loads barely affect the reading. The gauges' change of resistance can be read on a Wheatstone bridge.
Hejuru
Workshop process
Amabwiriza
1
1
Base and shell
Base and shell
Weld a rigid, preferably cylindrical shell to a relatively heavy base, or secure it some other way.
Ibikoresho by'iyi ntambwe:
Urufatiro n'igishishwa cya silindiri bya sensori y'uburemere1 igiceIbikoresho bikenewe:
Imashini isudira ikoresha umuriro w'amashanyarazi2
2
Load column and gauges
Load column and gauges
Screw the lower end of the load-sensitive column rigidly to the base; round its upper end to a half-sphere. Bond wire strain gauges to its surface at several points around it, so bending cancels out, and mount gauges of the same type crosswise for temperature compensation. The column may be round, but square, solid or hollow, makes the gauges easier to apply. Its capacity is set by its cross-section and the stiffness of its material.
Ibikoresho by'iyi ntambwe:
Inkingi yumva uburemere1 igice
Igipima-kurambura cy'insinga gifatishijwe1 ikirundoIbikoresho bikenewe:
Ikusanyirizo ry'ibitorezi3
3
Floating piston
Floating piston
Bore the piston so the column reaches up inside it and its rounded end bears on the end of the bore. Centre the piston in the shell with two annular diaphragms, upper and lower, welded or brazed to piston and shell: widely spaced, they let it move freely up and down but resist side loads and off-centre loads.
Ibikoresho by'iyi ntambwe:
Pisitoni ireremba yakira uburemere1 igice
Diyafaragimu iyobora imeze nk'impeta2 ibiceIbikoresho bikenewe:
Imashini yo guhinguza icyumaImashini isudira ikoresha umuriro w'amashanyarazi4
4
Overload ring and leads
Overload ring and leads
Set a safety ring under the piston with a small clearance: past a safe load, the piston lands on it and the excess goes straight to the base. Bring the gauge leads down through a hole in the ring and out through the lower diaphragm to an external cable. The gauges may be wired as a Wheatstone bridge. The cell can be sealed all round by brazing, or potted.
Ibikoresho by'iyi ntambwe:
Impeta irinda uburemere burenze1 igice
Umugozi w'insinga nyinshi1 igice
Urusinga rw'isudire1 as requiredIbikoresho bikenewe:
Icyuma cyo gusudira cy'amashanyarazi
Igikoresho cyo gukuramo igifuniko cy'insinga5
5
Zero check
Zero check
To read the zero without moving the tank, seat a fixed ball race on top of the shell and a turning race above it, with balls between on a slightly inclined cam surface and a second row of balls under the loaded surface. Turning the upper race with a bar or spanner lifts the load a few thousandths of an inch off the piston; read the bridge, then turn it back.
Ibikoresho by'iyi ntambwe:
Inzira ebyiri z'amapira zifite kame1 igice
Ibikoresho by'utubumbe tw'icyuma1 ikirundoIbikoresho bikenewe:
Isupana ihindukaIbikoresho
10- 1 igiceUmwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- 1 igiceUmwanya
- 1 as requiredUmwanya
- Umwanya
- 1 ikirundoUmwanya
Ibikoresho bikenewe
6- Umwanya
- Umwanya
- Umwanya
Iki gishushanyo gikora
Blueprint zijyanye
Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame
CC0 Umurenge rusange
Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.
Shyigikira Umuremyi ugura ibicuruzwa binyuze muri Blueprint ye Komisiyo y'Umuremyi byashyizweho n'Abacuruzi, cyangwa kora verisiyo nshya y'iyi Blueprint ukayinjiza nk'isano muri Blueprint yawe kugira ngo musangire inyungu.