CN2085950U - Multi-point displacement apparatus - Google Patents
Multi-point displacement apparatus Download PDFInfo
- Publication number
- CN2085950U CN2085950U CN 90224790 CN90224790U CN2085950U CN 2085950 U CN2085950 U CN 2085950U CN 90224790 CN90224790 CN 90224790 CN 90224790 U CN90224790 U CN 90224790U CN 2085950 U CN2085950 U CN 2085950U
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- CN
- China
- Prior art keywords
- box
- amplifier
- semi
- girder
- displacement meter
- 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.)
- Withdrawn
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Abstract
The utility model discloses a displacement apparatus for the multi-point measurement of the displacements of rocks, which is composed of a deformation box (1), an anchor head (4) and an installing device. Strain foils (11) arranged on cantilever beams (2) in the deformation box (1) are connected into a full bridge. Amplifiers (8) are fixed on the box arm of the deformation box below every cantilever beam (2) in a one-to-one corresponding relation with the cantilever beams (2). The displacement apparatus is characterized in that a full bridge output way is adopted to reduce zero drifts and improve the repetitiveness and stability of the measuring data. The integration of measuring circuits and the amplifiers realizes the integration and the miniaturization of the displacement apparatus.
Description
The utility model relates to a kind of sensor, especially about measuring the UNDERGROUND STRUCTURES rock because of the stressed sensor that produces displacement.
Usually, when measuring the displacement of underground structure rock, must be equipped with strainmeter, oscillograph, auxiliary devices such as power supply with displacement meter.The core component of intact " the boring multipoint displacement meter " made of Electricity Department Kunming survey and design is a distortion box, posts two foil gauges on the semi-girder wherein, forms half-bridge.This displacement meter is a resistance change rate with the displacement conversion of rock, is converted to electric current through strainmeter and changes, and shows through oscillograph again.As seen during on-the-spot test, need three to four instruments, reduced measuring accuracy, increased the fault probability and carried, use inconvenience.
The purpose of this utility model is in order to overcome above-mentioned shortcoming, a kind of measuring accuracy height, good stability, volume displacement meter little, portable, that just use to be provided.
The utility model is made up of distortion box, anchor head and erector.The distortion box contains six semi-girders and amplifier.Paste four foil gauges on each semi-girder, be connected into full-bridge.The semi-girder root is fixed on the box wall of distortion box, and free end connects the string wire silk, and the other end of string wire silk connects anchor head.Amplifier is fixed on the box arm below the corresponding semi-girder.With erector anchor head is delivered to rock interior position to be measured, the distortion box is fixed on rock surface.When rock produces change in displacement, pass to the semi-girder that is out of shape in the box by anchor head, string wire silk, the full-bridge on the semi-girder changes to amplifier output voltage, and amplifier is amplified to 0～± 5 volt of voltage signal output with this variation.
The utility model adopts full-bridge output, reduced zero drift as much as possible, improved the repeated and stable of measurement data, simultaneously, replace strainmeter, place among the distortion box with amplifier, make the in-site measurement instrument integrated, miniaturization has reduced the number of packages of in-site measurement instrument, has reduced the sum of errors failure rate.During with this utility model Displacement Measurement, output be the voltage analog that is proportional to displacement, through A/D converter, become the voltage digital amount, just can connect with microcomputer, realize measurement, analysis, processing, calculating, drawing automation by instruction.
Below in conjunction with accompanying drawing the utility model is elaborated
Fig. 1 is an on-the-spot test installation diagram of the present utility model.Among the figure, (1) is the distortion box; (2) be semi-girder; (3) be the string wire silk; (4) be anchor head; (5) be boring; (6) be rock surface; (7) be set bolt.
Fig. 2 is a structural drawing of the present utility model.Among the figure, (8) are amplifiers; (9) be lid; (10) be aviation plug; ［ 11 ］ be foil gauge; ［ 12 ］ be trip bolt.
Fig. 3 is an electrical schematic diagram of the present utility model.Among the figure, ［ 13 ］ are zero potentiometers; ［ 14 ］ be build-out resistor; ［ 15 ］ be to transfer the sensitivity potentiometer; (8) be operational amplifier.
In Fig. 1, distortion box of the present utility model (1) is fixed on the rock surface (6), connects with the anchor head (4) of inserting the interior detected part of rock by string wire silk (3), and the length of string wire silk is decided on the degree of depth of measurement point.As can be seen from Figure 2, distortion has the semi-girder (2) of six symmetries in the box, and it is made through thermal treatment with steel spring plate, and its technology is that temperature rises to 750～850 ℃, in the immersion oil, treat one hour after, natural cooling forms, its thickness is 0.5～1.5 millimeter.Two foil gauges ［ 11 ］ are pasted on the positive and negative two sides of each semi-girder respectively.The root of semi-girder is fastened on trip bolt ［ 12 ］ on the box wall of distortion box, and free end is fixing with trip bolt and string wire silk (3).A corresponding amplifier (8) also is fixed on the box arm below each suspended wall.Amplifier is differential input operational amplifier chip, and model is OP27.Fig. 3 shows that four foil gauges ［ 11 ］ that paste on each semi-girder are connected into full-bridge.Power supply is 12 volts of D.C. regulated power supplies.Zero potentiometer ［ 13 ］ is 20 kilo-ohms a potentiometer.The amplifier sensitivity adjusting is by transferring sensitivity potentiometer ［ 15 ］ to finish, and its resistance is 100 kilo-ohms.
During on-the-spot test, anchor head (4) is with the rock change in displacement that detects, pass to the semi-girder (2) that is out of shape in the box (1) by string wire silk (3), full-bridge foil gauge on the semi-girder converts change in displacement to voltageization, export built-in amplifier (8) to, amplifier (8) converts the unbalance voltage that receives to 0～± 5 volt of voltage signal that is proportional to the rock displacement.Its performance reaches nonlinearity erron and is lower than 0.1%, and nonrepeatability is less than 0.1%, and the displacement range reaches ± 3 millimeters, can measure the rock change in displacement of the different depth between six 1 to 10 meter simultaneously, and sensitivity reaches 716 millivolts/millimeter.This utility model can be mated with A/D converter, microcomputer, with its image data of system controlled by computer.
Claims (4)
1, a kind of multipoint displacement meter of being made up of distortion box (1), anchor head (4) and erector is characterized in that:
Foil gauge (11) on a, distortion box (1) internal cantilever beam (2) is connected into full-bridge
On b, the distortion box box arm below each semi-girder (2), fixing amplifier (8) correspondingly.
2, according to the displacement meter of claim 1 regulation, it is characterized in that two 350 ohm the ethyl silk formula foil gauge that contracts is pasted on positive and negative two sides respectively on the semi-girder, be of a size of 5 * 5 millimeters, be connected into full-bridge circuit.
3, according to the displacement meter of claim 1 regulation, it is characterized in that amplifier adopts the differential operational amplifier chip of highly sensitive low drift, model is OP27.
4,, it is characterized in that being provided with 100 kilo-ohms of potentiometers and 20 kilo-ohms of zero potentiometers of adjusting amplifier sensitivity according to the displacement meter of claim 3 regulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90224790 CN2085950U (en) | 1990-12-18 | 1990-12-18 | Multi-point displacement apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90224790 CN2085950U (en) | 1990-12-18 | 1990-12-18 | Multi-point displacement apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2085950U true CN2085950U (en) | 1991-10-02 |
Family
ID=4902309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90224790 Withdrawn CN2085950U (en) | 1990-12-18 | 1990-12-18 | Multi-point displacement apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2085950U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046722A (en) * | 2021-10-12 | 2022-02-15 | 中车唐山机车车辆有限公司 | Displacement meter |
-
1990
- 1990-12-18 CN CN 90224790 patent/CN2085950U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046722A (en) * | 2021-10-12 | 2022-02-15 | 中车唐山机车车辆有限公司 | Displacement meter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |