CN201548854U - Full-automatic high-precision tension force control instrument - Google Patents
Full-automatic high-precision tension force control instrument Download PDFInfo
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- CN201548854U CN201548854U CN200920016467XU CN200920016467U CN201548854U CN 201548854 U CN201548854 U CN 201548854U CN 200920016467X U CN200920016467X U CN 200920016467XU CN 200920016467 U CN200920016467 U CN 200920016467U CN 201548854 U CN201548854 U CN 201548854U
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- control panel
- digital quantity
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Abstract
The utility model discloses a full-automatic high-precision tension force control instrument which is composed of a power supply, a control panel, a manual operator and a computer; the control panel is connected with the manual operator by RS485, and the manual operator is connected with the computer by RS232; the user can set the measuring ranges of different tension sensors through the keys of the manual operator, inputs standard values, adopts the DO output of the control panel to control a stepping motor to rotate and generate the corresponding tension force, and then the tension sensors detect the tension force and output signals, the signals are used as feedback after AD sampling and enable the tension force generated by the stepping motor equal to the tension force corresponding to the standard value inputted through keys, the apparatus or instrument for verification senses the tension force and outputs a standard instrument signal, and the measurement value of the apparatus or instrument is obtained after the AD sampling of the standard signal; the utility model compares the measurement value with the standard value to obtain the detection precision of the apparatus or instrument, and also displays the standard value, the measurement value and the measurement precision on a LCD screen.
Description
Technical field
The utility model belongs to the technology of instrument and meter field, relates to the full automatic high precision pull controller, specially refers to liquid level gauge verification full automatic high precision pull controller.
Background technology
At present, known tester has pressure testers, temperature tester, mutual-inductor tester etc., be mainly used in the precision of various device or instrument is tested, but there is not the pulling force controller in these calibration equipments basically, some lacks the good man-machine interaction interface, exist the calibration equipment of pulling force controller to require single to the pulling force sensor range mostly, pure manual control many, and the accuracy requirement of input signal acquisition precision and pulling force sensor power supply is not high, is applicable to that the controller of liquid level gauge verification is fewer.
Summary of the invention
The utility model is at above-mentioned technical matters, a kind of full automatic high precision pull controller is provided, it mainly is a kind of liquid level gauge verification full automatic high precision pull controller, its purpose is, be primarily aimed at lack the pulling force controller in the prior art, lack man-machine interaction, single, the automatic control of pulling force sensor range less, input signal acquisition precision and pulling force sensor power supply precision be not high, is used for problems such as the controller of liquid level gauge verification is few.
For solving the problems of the technologies described above, the utility model full automatic high precision pull controller is made up of power supply, control panel, manual operator and computing machine, and control panel is connected with manual operator by RS485, and manual operator is connected with computing machine by RS232;
Control panel is made up of CPU, signals collecting importation, signal condition amplifying circuit, A/D change-over circuit, RS485 interface circuit, EEPROM, DI digital quantity importation and DO digital quantity output, wherein the signals collecting importation is connected through the input of signal condition amplifying circuit with the A/D change-over circuit, and CPU connects the output of RS485 interface circuit, EEPROM, DI digital quantity importation, DO digital quantity output and A/D change-over circuit respectively;
Manual operator is made up of CPU, LCD, EEPROM, RS232 interface circuit, RS485 interface circuit, DO digital quantity output and button, and wherein CPU connects RS232 interface circuit, RS485 interface circuit, EEPROM, LCD, DO digital quantity output and button respectively;
The DO digital quantity output of control panel connects stepper motor driver, the DO digital quantity output of described manual operator connects the DI digital quantity importation of control panel, the pulling force sensor upper limit, stop, the output signal of lower limit place limit switch connects the DI digital quantity importation of control panel, the output signal of pulling force sensor connects the signals collecting importation of control panel, the output of instrument or instrument connects the signals collecting importation of control panel, differential complete floating null circuit is adopted in the signals collecting importation of control panel
Power supply of the present utility model is connected with the input of LM2576 through the protection filtering circuit, and the output of described LM2576 is connected with the DC-DC converter through another protection filtering circuit, and the output of DC-DC converter is connected with filtering circuit; The output of wherein said LM2576 produces simulation+5V voltage and partly powers for the digital quantity DO output of control panel and the simulation part of RS485 interface circuit, the RS485 interface circuit of manual operator and the simulation of RS232 interface circuit behind another protection filtering circuit, simulation+5V voltage produces numeral+5V voltage and partly powers for the digital circuit of control panel and manual operator behind DC-DC converter and filtering circuit.
Wherein, under optimal way, the model of the CPU of the utility model control panel is that the model of the EEPROM of W77E58, control panel is that the model of X25045, A/D change-over circuit is that the model of the CPU of ICL7135, manual operator is that the model of the EEPROM of W77E516, manual operator is that the model of AT24C128, DC-DC converter is WRB0505S.
When using, the utility model connects use with pulling force sensor, stepper motor, float level meter.The power supply of pulling force sensor is that power supply of the present utility model is connected with the input of 74HC161 through the output of LM2576 and the output of 4M crystal oscillating circuit simultaneously, 74HC161 output push away through 24V again and exempt from circuit and transformer isolation half-wave rectifying circuit, again simultaneously through 7812 and 7912, output through 7812 connects the input end of OP07 discharge circuit through 78L05 and MC1403, and the output of OP07 discharge circuit is through the output of Darlington driving circuit.
During use, the utility model is by the range ability of pressing the different pulling force sensors of key assignments of manual operator, and input standard value, the linear transformation of machine as calculated, needing to obtain the standard tension value of generation, stepper motor driver is arrived in DO output 0～5V pulse by control panel, the control step motor rotates, to produce corresponding pulling force, detect this pulling force by pulling force sensor, and export 0～20mV signal, this signal carries out the AD sampling by the utility model, as feedback, constitute a single loop closed-loop control, the pulling force that makes stepper motor produce equals the pairing pulling force of standard value of button input, after being responded to this pulling force by the instrument of verification or instrument, the outputting standard instrument signal, this standard signal carries out the AD sampling by the utility model, after the linearity conversion, obtain the measured value of instrument or instrument, the utility model compares this measured value and standard value, thereby obtains the accuracy of detection of instrument or instrument, and standard value, measured value, measuring accuracy is presented on the LCD screen in the lump.
The function of the utility model each several part:
1. differential complete floating null circuit is adopted in control panel signals collecting importation, is convenient to carry out ensuing signal Processing;
2. control panel signal condition amplifying circuit has mainly been realized the processing of differential input signal, amplifies;
3. control panel A/D change-over circuit: realized the conversion of analog signals to digital quantity signal.Transformation result is sent into control panel CPU to be handled;
4. control panel CPU: mainly realized the A/D conversion driving, pulling force control, EEPROM storing driver, RS485 communication drivers, data processing;
5. manual operator CPU: realized the liquid crystal display driving, data processing, button drives, EEPROM storing driver, RS485 and RS232 communication drivers;
6.RS485 interface circuit: the real-time Transmission that has realized data;
7. the RS232 interface circuit of manual operator: realized the serial communication of manual operator and computing machine, the data that EEPROM in the manual operator is preserved are sent to computing machine and handle;
8. manual operator DO digital quantity output: be used for the pulse of manual control step motor and turn to level;
9. control panel DO digital quantity output: export the pulse of stepper motor and turn to level, realize the stepper motor rotating speed and turn to control;
10. control panel DI digital quantity input: the output signal of the pulling force sensor upper limit, parking, lower limit place limit switch connects the input of DI digital quantity, has realized warning function.
Description of drawings
Fig. 1 is a structured flowchart of the present utility model,
Fig. 2 is a work system block diagram of the present utility model,
Fig. 3 is a circuit block diagram of the present utility model,
Fig. 4 is the circuit block diagram of the utility model power supply,
Fig. 5 is the circuit block diagram of the utility model pulling force sensor power supply.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
Shown in Fig. 1,3, the utility model full automatic high precision pull controller is made up of power supply, control panel, manual operator and computing machine, and control panel is connected with manual operator by RS485, and manual operator is connected with computing machine by RS232;
Control panel is made up of CPU, signals collecting importation, signal condition amplifying circuit, A/D change-over circuit, RS485 interface circuit, EEPROM, DI digital quantity importation and DO digital quantity output, wherein the signals collecting importation is connected through the input of signal condition amplifying circuit with the A/D change-over circuit, and CPU connects the output of RS485 interface circuit, EEPROM, DI digital quantity importation, DO digital quantity output and A/D change-over circuit respectively;
Manual operator is made up of CPU, LCD, EEPROM, RS232 interface circuit, RS485 interface circuit, DO digital quantity output and button, and wherein CPU connects RS232 interface circuit, RS485 interface circuit, EEPROM, LCD, DO digital quantity output and button respectively;
The DO digital quantity output of control panel connects stepper motor driver, the DO digital quantity output of described manual operator connects the DI digital quantity importation of control panel, the output signal of the pulling force sensor upper limit, parking, lower limit place limit switch connects the DI digital quantity importation of control panel, the output signal of pulling force sensor connects the signals collecting importation of control panel, the output of instrument or instrument connects the signals collecting importation of control panel, and differential complete floating null circuit is adopted in the signals collecting importation of control panel.
As shown in Figure 4, power supply of the present utility model is 24VDC, power supply 24VDC is connected with the input of LM2576 through the protection filtering circuit, and the output of described LM2576 is connected with the DC-DC converter through another protection filtering circuit, and the output of DC-DC converter is connected with filtering circuit; The output of wherein said LM2576 produces simulation+5V voltage and partly powers for the digital quantity DO output of control panel and the simulation part of RS485 interface circuit, the RS485 interface circuit of manual operator and the simulation of RS232 interface circuit behind another protection filtering circuit, simulation+5V voltage produces numeral+5V voltage and partly powers for the digital circuit of control panel and manual operator behind DC-DC converter and filtering circuit.
The model of the CPU of the utility model control panel is that the model of the EEPROM of W77E58, control panel is that the model of X25045, A/D change-over circuit is that the model of the CPU of ICL7135, manual operator is that the model of the EEPROM of W77E516, manual operator is that the model of AT24C128, DC-DC converter is WRB0505S.
As shown in Figure 5, the power supply of pulling force sensor is that power supply 24VDC of the present utility model is connected with the input of 74HC161 through the output of LM2576 and the output of 4M crystal oscillating circuit simultaneously, 74HC161 output push away through 24V again and exempt from circuit and transformer isolation half-wave rectifying circuit, repeatedly filtering is more simultaneously through 7812 and 7912 generation ± 12V, this ± 12V gives the power supply of OP07 amplifying circuit, output+12V through 7812 is transformed into+5V through 78L05, should+5V voltage behind MC1403 output reference voltage to OP07 discharge circuit input end, the output of OP07 discharge circuit is through Darlington driving circuit outputting standard 10V, and power is the high-precision power of 250mW.24V pushes away and exempts from circuit and provide AC signal to primary, then carry out voltage transitions and isolate generation 5v voltage, this 5V gives signals collecting, and the AD conversion waits partly power supply separately of simulation, the 4M crystal oscillating circuit is used to produce 0.25 μ S clock and offers 74HC161, exports 2 μ S square waves.
Connect use with pulling force sensor, stepper motor, float level meter when as shown in Figure 2, the utility model uses.During use, the utility model is by the range ability 5000.0g that presses the key assignments pulling force sensor of manual operator, if the corresponding pulling force sensor weight range of the output signal 4～20mA of float level meter 3000～1000g, then import standard value 10mA simultaneously, machine computing conversion as calculated, needing to obtain the standard tension value 1750g of generation, DO output 5V pulse by control panel and 5V level are to stepper motor driver, control step motor rotation speed and direction, to produce corresponding pulling force, the 5V direct supply is provided by control panel, if detect current value of thrust 1000g by pulling force sensor, output signal 4mV then, this signal carries out the AD sampling by the utility model, as feedback, be input in the computing machine, because current value of thrust is less than the standard tension value, control panel sends stepper motor is just changeing pulse signal, otherwise control panel sends the inversion pulse signal, make the stepper motor living pulling force of just changing the line of production approach till the pairing pulling force of standard value of button input, if liquid level gauge output signal 9.85mA this moment, this standard signal carries out the AD sampling by the utility model, after the linearity conversion, obtain the measured value 9.85mA of instrument or instrument, the utility model compares this standard value and measured value, thereby obtains the accuracy of detection of instrument or instrument, and standard value, measured value, measuring accuracy is presented on the LCD screen in the lump.
Differential complete floating null circuit design is adopted in the input signal collection of the utility model control panel, utilize high anti-common mode interference amplifying circuit, selecting the AD chip for use is ICL7135, and inversion frequency reaches 500KHz, and the change-over period is 80ms, integral multiple for the power frequency interference period, and adopt double integrator AD conversion regime, effectively suppress power frequency and disturb, design of transformer isolation power supply and filtering, the DC-DC digital-to-analogue is isolated, and adopts median filtering technology on the software.The utility model can be realized the verification of instruments such as liquid level gauge or instrument, and has a good man-machine interaction interface, can be by test automatically behind all calibration points of the disposable input of manual operator, and on manual operator display standard value, measured value and error, self calibration, data storage, search function are arranged.Can and generate the standard format form on computers with compunication by software, functions such as printing, storage, retrieval are arranged; Support multiple range pulling force sensor in addition, but Automatic Control, and the input signal acquisition precision reach ± 0.2 ‰ and pulling force sensor 10V reference power supply precision reach ± 2mV, power is 250mW.
Claims (7)
1. a full automatic high precision pull controller is made up of power supply, control panel, manual operator and computing machine, it is characterized in that: described control panel is connected with described manual operator by RS485, and described manual operator is connected with described computing machine by RS232;
Described control panel is made up of CPU, signals collecting importation, signal condition amplifying circuit, A/D change-over circuit, RS485 interface circuit, EEPROM, DI digital quantity importation and DO digital quantity output, wherein said signals collecting importation is connected through the input of signal condition amplifying circuit with the A/D change-over circuit, and described CPU connects the output of RS485 interface circuit, EEPROM, DI digital quantity importation, DO digital quantity output and A/D change-over circuit respectively;
Described manual operator is made up of CPU, LCD, EEPROM, RS232 interface circuit, RS485 interface circuit, DO digital quantity output and button, and wherein said CPU connects RS232 interface circuit, RS485 interface circuit, EEPROM, LCD, DO digital quantity output and button respectively.
2. according to the described full automatic high precision pull controller of claim 1, it is characterized in that: the DO digital quantity output of described control panel connects stepper motor driver, the DO digital quantity output of described manual operator connects the DI digital quantity importation of control panel, and the output signal of the pulling force sensor upper limit, parking, lower limit place limit switch connects the DI digital quantity importation of control panel.
3. according to claim 1 or 2 described full automatic high precision pull controllers, it is characterized in that: differential complete floating null circuit is adopted in the signals collecting importation of described control panel.
4. according to claim 1 or 2 described full automatic high precision pull controllers; it is characterized in that: described power supply is connected with the input of LM2576 through the protection filtering circuit; the output of described LM2576 is connected with the DC-DC converter through another protection filtering circuit, and the output of DC-DC converter is connected with filtering circuit.
5. according to the described full automatic high precision pull controller of claim 2, it is characterized in that: the power supply of pulling force sensor is that described power supply is connected with the input of 74HC161 through the output of LM2576 and the output of 4M crystal oscillating circuit simultaneously, 74HC161 output push away through 24V again and exempt from circuit and transformer isolation half-wave rectifying circuit, again simultaneously through 7812 and 7912, output through 7812 connects the input end of OP07 discharge circuit through 78L05 and MC1403, and the output of OP07 discharge circuit is through the output of Darlington driving circuit.
6. according to claim 1 or 2 described full automatic high precision pull controllers, it is characterized in that: the model of the CPU of described control panel is W77E58, the model of the EEPROM of control panel is X25045, the model of A/D change-over circuit is ICL7135, the model of the CPU of manual operator is W77E516, and the model of the EEPROM of manual operator is AT24C128.
7. according to the described full automatic high precision pull controller of claim 4, it is characterized in that: the model of described DC-DC converter is WRB0505S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920016467XU CN201548854U (en) | 2009-08-20 | 2009-08-20 | Full-automatic high-precision tension force control instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920016467XU CN201548854U (en) | 2009-08-20 | 2009-08-20 | Full-automatic high-precision tension force control instrument |
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| Publication Number | Publication Date |
|---|---|
| CN201548854U true CN201548854U (en) | 2010-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920016467XU Expired - Fee Related CN201548854U (en) | 2009-08-20 | 2009-08-20 | Full-automatic high-precision tension force control instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201548854U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207629A (en) * | 2012-01-11 | 2013-07-17 | 昆山允升吉光电科技有限公司 | Accurate control stretching device |
| CN103278266A (en) * | 2013-04-26 | 2013-09-04 | 天津长荣印刷设备股份有限公司 | Pressure detection and protection circuit and working method thereof |
-
2009
- 2009-08-20 CN CN200920016467XU patent/CN201548854U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207629A (en) * | 2012-01-11 | 2013-07-17 | 昆山允升吉光电科技有限公司 | Accurate control stretching device |
| CN103278266A (en) * | 2013-04-26 | 2013-09-04 | 天津长荣印刷设备股份有限公司 | Pressure detection and protection circuit and working method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DALIAN STANDARD ELECTROMECHANICAL EQUIPMENT CO., L Free format text: FORMER OWNER: DALIAN UNIVERSITY OF TECHNOLOGY Effective date: 20120514 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120514 Address after: Shahekou Chengren Street District of Dalian city in Liaoning province 116024 surplus building No. 11 No. 3110 Patentee after: Dalian Standard Electromechanical Equipment Co., Ltd. Address before: 116024 Liaoning, Dalian, Ganjingzi Ling Road, No. 2 Patentee before: Dalian University of Technology |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100811 Termination date: 20130820 |