CN201034885Y - Material tester control device - Google Patents
Material tester control device Download PDFInfo
- Publication number
- CN201034885Y CN201034885Y CNU2007200368907U CN200720036890U CN201034885Y CN 201034885 Y CN201034885 Y CN 201034885Y CN U2007200368907 U CNU2007200368907 U CN U2007200368907U CN 200720036890 U CN200720036890 U CN 200720036890U CN 201034885 Y CN201034885 Y CN 201034885Y
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- microprocessor
- stepper motor
- converter
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Abstract
The utility model relates to a material test equipment, particular to a material tester control device. The utility model has the advantages that this device comprises a microprocessor, a LCD display, a composite function key-press, a test bed lifting location stop control circuit, a pressure sensor, an A/D converter, as well as a stepping motor and a stepping motor rotation limit control circuit. The composite function key-press, the test bed lifting location stop control circuit, the A/D converter and the stepping motor rotation limit control circuit are connected onto the input terminal of the microprocessor, furthermore the pressure sensor is connected with the A/D converter, and the LCD display, the stepping motor are connected onto the output terminal of the microprocessor. The utility model is applied with a stepping motor control hydraulic valve to replace the electro-hydraulic servo valve, and totally digital closed ring operational mode is applied, therefore having the advantages that electro-hydraulic servo pressure tester has high automation and integration, and that the operation is worked by the keyboard. Thus the required data detecting accuracy and reliability of the pressure tester is satisfied at present, without requirements of influence of artificial factors.
Description
Technical field
The utility model relates to material test equipment, relates in particular to a kind of material testing machine control device.
Background technology
Material Testing Machine is implemented to stretch mechanical tests such as compression, bending, shearing to metal, nonmetallic materials by its hydraulic mechanism.Present most material test is manual loading formula or manual loading digital display type testing machine, the advantage of these 2 kinds of manual loading machines is that cost is low, reliability is high, can be applicable to various rugged environments, oil sources there is not specific (special) requirements, but since be by manually-operated control into, hydraulic valve is controlled added magnitude of load on the test specimen on the return line, randomness and contingency are big, and the error of loading velocity and data read is also bigger.
Comparatively advanced at present Material Testing Machine is the electro-hydraulic servo pressure testing machine, it has adopted advanced technologies such as the electrohydraulic servo valve group of wide speed regulating range and computer numerical control (CNC), form full digital closed-loop drive control system, can measure and control processs of the test such as testing machine loading automatically and accurately, the automaticity height, range of control is wide, function is many, whole operation keyboardizations, various test parameterss are controlled, measure, show, are handled and printed by computing machine, the integrated level height.The electrohydraulic servo valve group is one of two kinds of electrohydraulic servo valve or electro-hydraulic proportional valves normally.Adopt electrohydraulic servo valve, cost is very high, and at present domestic also do not possess productive capacity completely, import many.Electro-hydraulic proportional valve, though domestic can production, problems such as the dead band of electro-hydraulic proportional valve, minimum flow can not well be used on large-scale pressure experiment machine.Electrohydraulic servo valve and electro-hydraulic proportional valve are very high to the requirement of oil sources, though equipment such as the filtrator oil sources of evolving is arranged, easily form problems such as valve core obstruction, the cost height that uses, safeguards.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, design and a kind ofly not only had that manual loading machine cost is low, reliability is high but also have electro-hydraulic servo testing machine keyboard operation automaticity and the integrated level height, almost unmannedly be a kind of material testing machine control device of factor affecting, it is achieved through the following technical solutions:
Comprise microprocessor, LCD display, composite-functional key-press, the spacing control circuit of testing table lifting, pressure transducer, A/D converter, comprise that also stepper motor and stepper motor rotate the qualification control circuit, described composite-functional key-press, the spacing control circuit of testing table lifting, A/D converter, stepper motor rotate and limit the input end that control circuit is connected microprocessor, and pressure transducer is connected with A/D converter, and described LCD display and stepper motor are connected the output terminal of microprocessor.
The spacing control circuit of described testing table lifting is made up of contact switch K2, resistance and photoelectrical coupler, be connected to the input end of photoelectrical coupler behind the travel switch one end connection power supply VE one end series resistor R1, be connected to power supply VCC behind the output terminal series resistor R2 of photoelectricity coupling device, and the output terminal of this photoelectricity coupling device is connected with the I/O input end of microprocessor.
Described stepper motor rotates the qualification control circuit and is made up of travel switch K1, resistance and photoelectrical coupler, be connected to the input end of photoelectrical coupler G behind the travel switch one end connection power supply VE one end series resistor R1, be connected to power supply VCC behind the output terminal series resistor R2 of photoelectricity coupling device G, and the output terminal of this photoelectricity coupling device G is connected with the I/O input end of microprocessor.
The utility model be at old-fashioned manual loading formula and manually loading digital display type experimental machine undergo technological transformation and the technical scheme implemented, adopt the step motor control hydraulic valve to replace electrohydraulic servo valve, and employing full digital operation with closed ring mode, make the advantage of its robotization that is had that reaches the electro-hydraulic servo pressure testing machine, integrated degree height and operation keyboardization, satisfy present stage to detection data that pressure testing machine proposed accurately and reliably, unmanned is the demand of factor affecting.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the spacing control circuit schematic diagram of testing table lifting.
Fig. 3 is that stepper motor rotates qualification control circuit schematic diagram.
Among the figure, 1 composite-functional key-press, 2LCD display, 3 testing table lifting upper limit control circuits, 4 testing table lifting lower limit control circuits, the 5 electronics device of extending, 6 displacement coding counters, 7 pressure transducers, 8A/D converter, 9 oil-feed stepper motors, 10 oil return stepper motors, 11 stepper motors rotate and limit control circuit, the 12RS232 communication interface, the 13RS485 communication interface, 14 bluetooth communication interfaces, 15 data bus interfaces.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Contrast Fig. 1, the control device of present embodiment is by microprocessor MCU, LCD display 2, composite-functional key-press 1, testing table lifting upper limit control circuit 3, testing table lifting lower limit control circuit 4, pressure transducer 7, A/D converter 8, electronic extensometer 5, displacement coding counter 6, oil-feed stepper motor 9 and oil return stepper motor 10 and stepper motor rotate and limit control circuit 11 compositions, composite-functional key-press 1, testing table lifting upper limit control circuit 3, testing table lifting lower limit control circuit 4, A/D converter 8, rotate the input end that qualification control circuit 11 is connected microprocessor MCU with stepper motor, and pressure transducer 7 is connected with A/D converter 8.LCD display 2, oil-feed stepper motor 9, oil return stepper motor 10 are connected the output terminal of microprocessor MCU.
Microprocessor MCU in the present embodiment adopts the W77F58 chip, and adopts: PVC composite-functional key-press, CS5532 type A/D converter, 240 * 180 type LCD display.Displacement coding counter 6 is a kind of raster count devices, electronic extensometer is a kind of resistance strain gage, the microprocessor of W77F58 chip is provided with RS232, RS485 and bluetooth communication interface and data bus interface, can insert relevant device, to enlarge the function of the utility model control device.
Contrast Fig. 2, the upper and lower spacing control circuit 4 of testing table lifting all is that contact switch is made up of K2, resistance and photoelectrical coupler, be connected to the input end of photoelectrical coupler G behind the travel switch one end connection power supply VE one end series resistor R1, be connected to power supply VCC behind the output terminal series resistor R2 of photoelectricity coupling device G, and the output terminal of this photoelectricity coupling device G is connected with the I/O input end of microprocessor.R1, R2 adopt the resistance of 1.2K Ω and 10K Ω resistance respectively in the present embodiment, and VCC is the 5V power supply in the system, and photoelectricity coupling device G adopts the TLP521-4 type, and it meets power supply VE is special-purpose 5V power supply.
Contrast Fig. 3, it is almost completely identical with the upper and lower spacing control circuit 4 of testing table lifting shown in Figure 2 that the stepper motor rotation limits control circuit 11, and different only is that K switch 1 is the one stroke switch.
When Material Testing Machine is started working, testing table rises or the decline certain distance makes operating personnel put into test specimen well, the position that the upper and lower spacing control circuit of lifting rises or descends with the control testing table, testing table rises or when dropping to upper limit or lower limit, will make corresponding travel switch closure, the conducting of optocoupler output terminal, form low level signal, this signal is input to microprocessor MCU, treated, microprocessor MCU outputs signal to oil-feed stepper motor 9 or oil return stepper motor 10, makes it to close or open corresponding valve
Material Testing Machine loads test specimen, when adding to the critical value test specimen when destroyed, the hydraulic system decompression, pressure transducer 7 is input to microprocessor MCU with this signal by A/D converter, treated, microprocessor MCU outputs signal to oil-feed stepper motor 9 or oil return stepper motor 10, makes it to close or open corresponding valve, and testing table stops to rise or descending.
Stepper motor is when driving corresponding hydraulic valve and carry out closing motion, and closed as valve, stepper motor continues output and changes distance, just returns and makes valve " locked ", will open valve again, just needs bigger torque, and often stepper motor can not drive hydraulic valve again and opens.So the utility model control device is provided with stepper motor and rotates qualification control circuit 11, contact switch is installed in the control corresponding mechanism, in case valve closing, continue output as stepper motor and change distance, will the closing contact switch, make it to close, control circuit 11 conductings, photoelectric coupler output end will send signal to the input end of microprocessor MCU, and treated, microprocessor MCU outputs signal to corresponding stepper motor and makes it to stop operating.
Claims (3)
1. material testing machine control device, comprise microprocessor, LCD display, composite-functional key-press, the spacing control circuit of testing table lifting, pressure transducer, A/D converter, it is characterized in that also comprising that stepper motor and stepper motor rotate the qualification control circuit, described composite-functional key-press, the spacing control circuit of testing table lifting, A/D converter, stepper motor rotate and limit the input end that control circuit is connected microprocessor, and pressure transducer is connected with A/D converter, and described LCD display and stepper motor are connected the output terminal of microprocessor.
2. according to the described material testing machine control device of claim, it is characterized in that the spacing control circuit of described testing table lifting is made up of contact switch (K2), resistance and photoelectrical coupler, be connected to the input end of photoelectrical coupler (G) behind travel switch one end connection power supply (VE) the end series resistor (R1), be connected to power supply (VCC) behind the output terminal series resistor R2 of photoelectricity coupling device (G), and the output terminal of this photoelectricity coupling device (G) is connected with the I/O input end of microprocessor.
3. according to the described material testing machine control device of claim, it is characterized in that described stepper motor rotates the qualification control circuit and is made up of travel switch (K1), resistance and photoelectrical coupler, be connected to the input end of photoelectrical coupler behind travel switch one end connection power supply (VE) the end series resistor (R1), be connected to power supply (VCC) behind the output terminal series resistor R2 of photoelectricity coupling device, and the output terminal of this photoelectricity coupling device is connected with the I/O input end of microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200368907U CN201034885Y (en) | 2007-05-09 | 2007-05-09 | Material tester control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200368907U CN201034885Y (en) | 2007-05-09 | 2007-05-09 | Material tester control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201034885Y true CN201034885Y (en) | 2008-03-12 |
Family
ID=39195775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200368907U Expired - Fee Related CN201034885Y (en) | 2007-05-09 | 2007-05-09 | Material tester control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201034885Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095653A (en) * | 2011-01-28 | 2011-06-15 | 华东理工大学 | High-precision electronic insertion-withdrawal force testing system |
-
2007
- 2007-05-09 CN CNU2007200368907U patent/CN201034885Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095653A (en) * | 2011-01-28 | 2011-06-15 | 华东理工大学 | High-precision electronic insertion-withdrawal force testing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080312 Termination date: 20100509 |