GB1480746A - Pressure or load indication - Google Patents
Pressure or load indicationInfo
- Publication number
- GB1480746A GB1480746A GB5722373A GB5722373A GB1480746A GB 1480746 A GB1480746 A GB 1480746A GB 5722373 A GB5722373 A GB 5722373A GB 5722373 A GB5722373 A GB 5722373A GB 1480746 A GB1480746 A GB 1480746A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- load
- members
- measuring
- transducer means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/005—Measuring force or stress, in general by electrical means and not provided for in G01L1/06 - G01L1/22
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
Abstract
1480746 Measuring pressure or force electrically R J SAVAGE 10 Dec 1974 [10 Dec 1973] 57223/73 Headings G1N and G1W Apparatus for measuring an incident load or pressure acting on a structure includes a first member 3 for connection to the structure and a second, saucer-shaped, member 2 with its convex base facing away from the structure to receive said incident load or pressure, and its rim bearing against the first member 3 so that the second member 2 is able to deform elastically substantially freely under said load or pressure, and transducer means 7 coupled to the first and/or second member for producing an electrical signal indicative of the deformation of the second member. The transducer means 7 may be electrical resistance strain gauges or silicon chip strain gauges mounted symmetrically on the first and second members 3, 2 and connected to a bridge circuit or other measuring circuit. Alternatively the transducer may be a vibrating wire stretched between diametrically opposite points of the concave surface of the member 2 and excited by an electromagnet in a detecting circuit. Capacitance or reluctance transducers could be used. The first member 3 has a tube 6 to carry wiring to the transducer means, and may be flat, as shown, or, if the apparatus is to serve as a buried soil pressure gauge, may be saucer-shaped and oppositely disposed to the second member 2 to form a shell-like enclosure therewith. The second member 2 may be directly exposed to the incident load or pressure, or, as shown, may be covered by a third member 4. A deformable sealing ring 5 of plastics may enclose the periphery of the apparatus. The second member 2 is of aluminium, and the first and third members 3, 4 of stainless steel. In the shell-like soil pressure gauge above, both members may be of hard plastics. Failure of the second member 2 at a predetermined load may trigger an alarm. A peripheral array of these sensors may be used to measure external loads or pressures acting on lining segments (8) of a tunnel, Fig. 2A, (not shown).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5722373A GB1480746A (en) | 1974-12-10 | 1974-12-10 | Pressure or load indication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5722373A GB1480746A (en) | 1974-12-10 | 1974-12-10 | Pressure or load indication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1480746A true GB1480746A (en) | 1977-07-20 |
Family
ID=10478669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5722373A Expired GB1480746A (en) | 1974-12-10 | 1974-12-10 | Pressure or load indication |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1480746A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999063315A1 (en) * | 1998-06-04 | 1999-12-09 | Henrik Stang | A sensor for embedding in a cast material which transfers a pressure in the cast material to an electrical signal and a method to measure pressure in a cast material |
| CN112830405A (en) * | 2021-01-04 | 2021-05-25 | 中联重科股份有限公司 | Weighing base plate |
-
1974
- 1974-12-10 GB GB5722373A patent/GB1480746A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999063315A1 (en) * | 1998-06-04 | 1999-12-09 | Henrik Stang | A sensor for embedding in a cast material which transfers a pressure in the cast material to an electrical signal and a method to measure pressure in a cast material |
| CN112830405A (en) * | 2021-01-04 | 2021-05-25 | 中联重科股份有限公司 | Weighing base plate |
| CN112830405B (en) * | 2021-01-04 | 2022-08-02 | 中联重科股份有限公司 | Weighing base plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |