CN204043993U - A kind of input control system of tension tester - Google Patents
A kind of input control system of tension tester Download PDFInfo
- Publication number
- CN204043993U CN204043993U CN201420422765.XU CN201420422765U CN204043993U CN 204043993 U CN204043993 U CN 204043993U CN 201420422765 U CN201420422765 U CN 201420422765U CN 204043993 U CN204043993 U CN 204043993U
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- Prior art keywords
- converter
- tension tester
- primary controller
- control system
- amplifier
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Abstract
The utility model relates to material testing apparatus technical field, especially a kind of input control system of tension tester.It comprises the primary controller be connected with the drive motor of tension tester and the sensor be connected with the resistance strain gage of tension tester, also be connected with prime amplifier, traffic filter and A/D converter between described sensor and primary controller, described primary controller is AT89C5 type single-chip microcomputer; Resistance change is converted to the voltage signal of corresponding ratio by described sensor, the weak voltage signals that described sensor exports is delivered to A/D converter after prime amplifier carries out scale amplifying and traffic filter carries out filtering, and described A/D converter is delivered to primary controller after analog voltage signal is converted to digital voltage signal.The utility model greatly simplify the composition structure of control system, improves the degree of accuracy of input, has very strong practicality.
Description
Technical field
The utility model relates to material testing apparatus technical field, especially a kind of input control system of tension tester.
Background technology
As everyone knows, tension tester is a kind of pick-up unit being detected metal material, nonmetallic materials, parts, the intensity of component, rigidity, elasticity, plasticity, toughness and ductility by expanded material,
It is widely used in the every field such as machinery, building, communications and transportation, metallurgy, light textile, new material.
Tension tester is generally by stretching motor and extensometer (as shown in Figure 3, it is primarily of formations such as jig edge of a knife a, elastic component b, displacement transfer bar c, resistance strain gage d and shell e) etc. core component form, the load measurement of sample loads load by stretching motor to sample to stretch, make sample generation elastic deformation, plastic yield until the process of fracture, then utilize the resistance strain gage be mounted on sample that force amount is converted to resistance change amount; And the distortion measurement of sample be by sample clamping stagnation in jig edge of a knife a, blade and sample contacts, distance change between two blades and the change of sample deformation amount, strain transfer resistance variable quantity elastic component b produced by displacement transfer bar c and resistance strain gage d; And be no matter the load measurement for sample or distortion measurement, all need the resistance strain gage on the extensometer of pick-up unit and tension tester or miscellaneous part to be connected, export to realize final signal.
There are the problems such as complex structure, measuring accuracy are low, poor stability in the detecting and controlling system of existing tension tester, serious limits promoting the use of of tension tester.
Utility model content
For above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide the input control system of the tension tester that a kind of structure is simple, measuring accuracy is high, stability is strong.
To achieve these goals, the utility model adopts following technical scheme:
A kind of input control system of tension tester, it comprises the primary controller be connected with the drive motor of tension tester and the sensor be connected with the resistance strain gage of tension tester, also be connected with prime amplifier, traffic filter and A/D converter between described sensor and primary controller, described primary controller is AT89C5 type single-chip microcomputer;
Resistance change is converted to the voltage signal of corresponding ratio by described sensor, the weak voltage signals that described sensor exports is delivered to A/D converter after prime amplifier carries out scale amplifying and traffic filter carries out filtering, and described A/D converter is delivered to primary controller after analog voltage signal is converted to digital voltage signal.
Preferably, described prime amplifier comprises one-level amplifier and secondary amplifier, the in-phase input end of described one-level amplifier is connected with the output terminal of sensor respectively by one first resistance with inverting input, the described signal output part of secondary amplifier is connected with the input end of A/D converter, in-phase input end is connected with regulator, and the signal output part of described one-level amplifier is connected with the first adjustable resistance;
Described traffic filter comprises the RC filtering circuit between an inverting input being connected to the first adjustable resistance and secondary amplifier.
Preferably, described A/D converter is
the double integration A/D converter of position.
Preferably, described primary controller is also connected with PC by 232 interfaces.
Owing to have employed such scheme, the utility model greatly simplify the composition structure of control system, improves the degree of accuracy of input, has very strong practicality.
Accompanying drawing explanation
Fig. 1 is the system principle diagram of the utility model embodiment;
Fig. 2 is the prime amplifier of the utility model embodiment and the circuit connection structure figure of traffic filter;
Fig. 3 is the structural representation of the extensometer of tension tester in prior art.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
As depicted in figs. 1 and 2 and composition graphs 3, the input control system of the tension tester of the present embodiment, it comprises the primary controller 1 be connected with the drive motor A of tension tester and the sensor 2 be connected with the extensometer B of tension tester, is also connected with prime amplifier 3, traffic filter 4 and A/D converter 5 between sensor 1 and primary controller 2; Wherein, primary controller 1 can adopt AT89C5 type single-chip microcomputer.So, primary controller 1 can be utilized to apply certain load to control drive motor 1 to sample, make to be attached to the resistance strain gage on sample or the change of the generation of the resistance strain gage d on extensometer B resistance; Now, the resistance change of generation is converted to the voltage signal of corresponding ratio by sensor 2, the weak voltage signals that sensor 2 exports is amplified to required numerical value through prime amplifier 3 and is delivered to A/D converter 5 after traffic filter 4 carries out filtering, A/D converter 5 is delivered to primary controller 1 after analog voltage signal is converted to digital voltage signal, thus obtains corresponding testing result after utilizing primary controller 1 to process.
Due to sensor 1 detect and change after signal very faint, for ensureing the effect of input and process, the prime amplifier 3 of the present embodiment comprises one-level amplifier U1 and secondary amplifier U2, the in-phase input end of one-level amplifier U1 is connected with the output terminal of sensor 2 respectively by one first resistance R1 with inverting input, the signal output part of secondary amplifier U2 is then connected with the input end of A/D converter 5, in-phase input end is connected with regulator (regulator of the present embodiment can be made up of several the second resistance R2 and second adjustable resistance RL2), the first adjustable resistance RL1 is connected with at the signal output part of one-level amplifier U1, meanwhile, the traffic filter 4 of the present embodiment comprises one and is connected to RC filtering circuit (it is made up of the 3rd resistance R3 and electric capacity C1) between the first adjustable resistance RL1 and the inverting input of secondary amplifier U2.So, one-level amplifier U1 can be utilized to carry out twice differential amplify to faint voltage signal, done by secondary amplifier U2 to amplify further, to meet the signals collecting demand of A/D converter 5; Can be returned to zero and amplitude modulation process to voltage signal according to actual conditions by arranging of regulator; Traffic filter 5 is arranged between two amplifiers, and after being not only conducive to reducing differential amplify, resistance error is on the impact of whole system, also can ensure the precision that two-stage is amplified to greatest extent.
For reducing the cost of whole system, and the accuracy of detection of effective raising system and antijamming capability, the A/D converter 5 of the present embodiment can
the double integration A/D converter of position, as ICL7135A/D conversion chip.In addition, the function of horn of plenty whole system, makes testing result to be shown intuitively, and primary controller 1 is also connected with PC 7 by 232 interfaces 6.
The foregoing is only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model instructions and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (4)
1. the input control system of a tension tester, it comprises the primary controller be connected with the drive motor of tension tester and the sensor be connected with the resistance strain gage of tension tester, it is characterized in that: be also connected with prime amplifier, traffic filter and A/D converter between described sensor and primary controller, described primary controller is AT89C5 type single-chip microcomputer;
Resistance change is converted to the voltage signal of corresponding ratio by described sensor, the weak voltage signals that described sensor exports is delivered to A/D converter after prime amplifier carries out scale amplifying and traffic filter carries out filtering, and described A/D converter is delivered to primary controller after analog voltage signal is converted to digital voltage signal.
2. the input control system of a kind of tension tester as claimed in claim 1, it is characterized in that: described prime amplifier comprises one-level amplifier and secondary amplifier, the in-phase input end of described one-level amplifier is connected with the output terminal of sensor respectively by one first resistance with inverting input, the described signal output part of secondary amplifier is connected with the input end of A/D converter, in-phase input end is connected with regulator, and the signal output part of described one-level amplifier is connected with the first adjustable resistance;
Described traffic filter comprises the RC filtering circuit between an inverting input being connected to the first adjustable resistance and secondary amplifier.
3. the input control system of a kind of tension tester as claimed in claim 1 or 2, is characterized in that: described A/D converter is
the double integration A/D converter of position.
4. the input control system of a kind of tension tester as claimed in claim 3, is characterized in that: described primary controller is also connected with PC by 232 interfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420422765.XU CN204043993U (en) | 2014-07-29 | 2014-07-29 | A kind of input control system of tension tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420422765.XU CN204043993U (en) | 2014-07-29 | 2014-07-29 | A kind of input control system of tension tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204043993U true CN204043993U (en) | 2014-12-24 |
Family
ID=52244645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420422765.XU Expired - Fee Related CN204043993U (en) | 2014-07-29 | 2014-07-29 | A kind of input control system of tension tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204043993U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111932966A (en) * | 2020-08-31 | 2020-11-13 | 重庆水利电力职业技术学院 | Internet of things teaching system |
-
2014
- 2014-07-29 CN CN201420422765.XU patent/CN204043993U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111932966A (en) * | 2020-08-31 | 2020-11-13 | 重庆水利电力职业技术学院 | Internet of things teaching system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141224 Termination date: 20150729 |
|
| EXPY | Termination of patent right or utility model |