CN103278266A - Pressure detection and protection circuit and working method thereof - Google Patents
Pressure detection and protection circuit and working method thereof Download PDFInfo
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- CN103278266A CN103278266A CN2013101507930A CN201310150793A CN103278266A CN 103278266 A CN103278266 A CN 103278266A CN 2013101507930 A CN2013101507930 A CN 2013101507930A CN 201310150793 A CN201310150793 A CN 201310150793A CN 103278266 A CN103278266 A CN 103278266A
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Abstract
The invention provides a pressure detection and protection circuit. The pressure detection and protection circuit is characterized by comprising an analog signal generation unit, an analog signal processing circuit unit, an A/D (Analogue/Digital) conversion circuit unit and a controller. A working method comprises the following steps: detecting a signal, processing, calculating, comparing, displaying, comparing, alarming, moving and protecting. The pressure detection and protection circuit and the working method thereof have the advantages of wide application range, small errors, good man-machine interaction, strong expansibility, safety and reliability, and stability in protection.
Description
(1) technical field:
The invention belongs to detection and the protection field of seal back industry plant equipment (as die-cutting machine, gilding press etc.), especially a kind of pressure detection and holding circuit and method of work thereof.
(2) background technology:
In long period of time, print the back employed pressure detection of industry and protective device in the past, occur the problem of temperature drift, low precision and holding circuit misoperation in actual use easily.Because the existence of these problems causes this device can not effectively protect the safe handling of machinery, can not satisfy technologic requirement.So a kind of reliable high-precision pressure detection of exigence and protective device in the industry behind seal.
(3) summary of the invention:
The object of the present invention is to provide a kind of pressure detection and holding circuit and method of work thereof; it can overcome the shortcoming of existing pressure detection circuit precision deficiency; it is a kind of simple in structure, easy to operate, circuit that precision is high; its control method is easy-to-understand, and can detect and early warning pressure effectively.
Technical scheme of the present invention: a kind of pressure detection and holding circuit is characterized in that it comprises simulating signal generating unit, analog signal processing circuit unit, A/D conversion circuit unit and controller unit; Wherein, the input end of described simulating signal generating unit connects plant equipment to be detected; The input end of described analog signal processing circuit unit is gathered the analog signals of simulating signal generating unit, and its output terminal connects the input end of A/D conversion circuit unit; The input end of described controller unit receives the digital quantity signal that the A/D conversion circuit unit sends.
Described a kind of pressure detection and holding circuit also comprise the numerical value display unit, and the input end of described numerical value display unit connects the output terminal of controller unit, show the numerical information of detected analog quantity.
Described simulating signal generating unit is pressure transducer, adopts to have highly sensitively, and the electric bridge that low temperature floats characteristic detects the structure of trickle change in electric, and it is transferred to the analog signal processing circuit unit with pressure signal.
Described analog signal processing circuit unit is operational amplification circuit, with the analog signals of input amplify, computing, and output it to the A/D conversion circuit unit and carry out signal conversion.
Described controller unit is to be made of microprogram control unit unit, communication unit, I/O interface unit and peripheral controllers unit; The input end of described microprogram control unit unit receives the digital quantity signal that the A/D conversion circuit unit sends, its output terminal is two-way by communication unit with the peripheral controllers unit and is connected, and by the I/O interface unit signal is passed to the peripheral controllers unit simultaneously; The output terminal of described microprogram control unit unit connects the input end of numerical value display unit; The output terminal of described peripheral controllers unit connects plant equipment to be detected.
Described microprogram control unit unit is PLC(Programmable Logic Controller---programmable logic controller (PLC)), single-chip microcomputer or DSP(Digital signal Processor---digital processing unit).
Described communication unit is the RS485 bus unit.
Described peripheral controllers unit is PLC, single-chip microcomputer or DSP.
What adopt between described microprogram control unit unit and the peripheral controllers unit is catechetical communication modes.
Described numerical value display unit is LCD(Liquid Crystal Display---LCD) or LED(Light-Emitting Diode---light emitting diode) display.
The method of work of a kind of pressure detection and holding circuit is characterized in that it may further comprise the steps:
1. the simulating signal generating unit detects plant equipment to be detected, gathered the analog signals of simulating signal generating unit by the analog signal processing circuit unit, it is carried out calculation process, undesired signal filtering with the lopsided pulse in the signal and space transmission obtains a comparatively stable analog signals;
2. the analog signals after the processing that 1. obtains of step converts digital quantity signal at the A/D conversion circuit unit, outputs it to the microprogram control unit unit in the controller unit;
3. after the microprogram control unit unit carried out the filtering interference to the digital quantity signal that collects, the value of averaging was calculated, and known quantity substitution formula (1) and the formula (2) to this mean value and user's input calculates current force value then:
y
1=Kx
1+b （1）
y
2Two Kx
2+ b (2)
Wherein: y
2Be maximum pressure value, y
1Be minimum pressure values, x
2Be sensor largest deformation amount, x
1Be the minimum deformation quantity of sensor, K is slope, and b is the biasing constant; The force value that calculates and pre-set reference value are compared;
4. the result after 3. the processing of gained is calculated by step will show at the display screen of numerical value display unit;
5. the result after 3. the processing of gained is calculated as if step has exceeded pre-set reference value, will produce alerting signal;
6. the microprogram control unit unit can pass to the peripheral controllers unit with alerting signal by the I/O interface unit, and action control can be made to plant equipment to be detected according to signal in this unit, treats checkout equipment gas and has arrived protective effect;
7. the microprogram control unit unit also can carry out communication by communication unit and peripheral controllers unit; 3. the result after the processing of gained is calculated with step passes to the peripheral controllers unit; the peripheral controllers unit also can be handled these data; if the result who handles is not in setting range; also warning can be produced, the effect of protection can be played equally.
The analog signal processing circuit unit of described step in 1. adopts the operational amplification circuit structure, and the signal that comes amplifies to gathering, computing and shaping are handled.
Superiority of the present invention is: 1, the early warning range property set, and this circuit set to adopt artificial setting means at pressure, can free set pressure early warning range, make circuit have range of application widely; 2, error is little, and the signal processing circuit that adopts can effectively suppress zero point drift, has temperature-compensation circuit, can reduce temperature to the influence of sampled signal; 3, good man-machine interface has Liquid Crystal Module, numerical value can be shown; 4, extensibility is strong, the I/O interface unit and the communication unit that have, and the I/O interface unit can be finished some logic controls, and communication unit can carry out the multi-computer communication task, enlarges protection domain, strengthens safety coefficient; 5, high stability has dual power supply system, and the microprogram control unit unit powers separately, has guaranteed the stability of microprogram control unit cell operation.
(4) description of drawings:
Accompanying drawing is the structural representation of the related a kind of pressure detection of the present invention and holding circuit.
(5) embodiment:
Embodiment: a kind of pressure detection and holding circuit (seeing accompanying drawing) is characterized in that it comprises simulating signal generating unit, analog signal processing circuit unit, A/D conversion circuit unit and controller unit; Wherein, the input end of described simulating signal generating unit connects plant equipment to be detected; The input end of described analog signal processing circuit unit is gathered the analog signals of simulating signal generating unit, and its output terminal connects the input end of A/D conversion circuit unit; The input end of described controller unit receives the digital quantity signal that the A/D conversion circuit unit sends.
Described a kind of pressure detection and holding circuit also comprise numerical value display unit (seeing accompanying drawing), and the input end of described numerical value display unit connects the output terminal of controller unit, show the numerical information of detected analog quantity.
Described simulating signal generating unit (seeing accompanying drawing) is pressure transducer, adopts to have highly sensitively, and the electric bridge that low temperature floats characteristic detects the structure of trickle change in electric, and it is transferred to the analog signal processing circuit unit with pressure signal.
Described analog signal processing circuit unit (seeing accompanying drawing) is operational amplification circuit, with the analog signals of input amplify, computing, and output it to the A/D conversion circuit unit and carry out signal conversion.
Described controller unit (seeing accompanying drawing) is to be made of microprogram control unit unit, communication unit, I/O interface unit and peripheral controllers unit; The input end of described microprogram control unit unit receives the digital quantity signal that the A/D conversion circuit unit sends, its output terminal is two-way by communication unit with the peripheral controllers unit and is connected, and by the I/O interface unit signal is passed to the peripheral controllers unit simultaneously; The output terminal of described microprogram control unit unit connects the input end of numerical value display unit; The output terminal of described peripheral controllers unit connects plant equipment to be detected.
Described microprogram control unit unit (seeing accompanying drawing) is single-chip microcomputer.
Described communication unit (seeing accompanying drawing) is the RS485 bus unit.
Described peripheral controllers unit (seeing accompanying drawing) is PLC.
What adopt between described microprogram control unit unit and the peripheral controllers unit is catechetical communication modes (seeing accompanying drawing).
Described numerical value display unit is the LCD LCD.
The method of work of a kind of pressure detection and holding circuit is characterized in that it may further comprise the steps:
1. the simulating signal generating unit detects plant equipment to be detected, gathered the analog signals of simulating signal generating unit by the analog signal processing circuit unit, it is carried out calculation process, undesired signal filtering with the lopsided pulse in the signal and space transmission obtains a comparatively stable analog signals;
2. the analog signals after the processing that 1. obtains of step converts digital quantity signal at the A/D conversion circuit unit, outputs it to the microprogram control unit unit in the controller unit;
3. after the microprogram control unit unit carried out the filtering interference to the digital quantity signal that collects, the value of averaging was calculated, and known quantity substitution formula (1) and the formula (2) to this mean value and user's input calculates current force value then:
y
l=kx
1+b （1）
y
2=kx
2+b （2）
Wherein: y
2Be maximum pressure value, y
1Be minimum pressure values, x
2Be sensor largest deformation amount, x
1Be the minimum deformation quantity of sensor, K is slope, and b is the biasing constant; The force value that calculates and pre-set reference value are compared;
4. the result after 3. the processing of gained is calculated by step will show at the display screen of numerical value display unit;
5. the result after 3. the processing of gained is calculated as if step has exceeded pre-set reference value, will produce alerting signal;
6. the microprogram control unit unit can pass to the peripheral controllers unit with alerting signal by the I/O interface unit, and action control can be made to plant equipment to be detected according to signal in this unit, treats checkout equipment gas and has arrived protective effect;
7. the microprogram control unit unit also can carry out communication by communication unit and peripheral controllers unit; 3. the result after the processing of gained is calculated with step passes to the peripheral controllers unit; the peripheral controllers unit also can be handled these data; if the result who handles is not in setting range; also warning can be produced, the effect of protection can be played equally.
The analog signal processing circuit unit of described step in 1. adopts the operational amplification circuit structure, and the signal that comes amplifies to gathering, computing and shaping are handled.
Claims (10)
1. a pressure detection and holding circuit is characterized in that it comprises simulating signal generating unit, analog signal processing circuit unit, A/D conversion circuit unit and controller unit; Wherein, the input end of described simulating signal generating unit connects plant equipment to be detected; The input end of described analog signal processing circuit unit is gathered the analog signals of simulating signal generating unit, and its output terminal connects the input end of A/D conversion circuit unit; The input end of described controller unit receives the digital quantity signal that the A/D conversion circuit unit sends.
2. according to the described a kind of pressure detection of claim 1 and holding circuit; it is characterized in that described a kind of pressure detection and holding circuit also comprise the numerical value display unit; the input end of described numerical value display unit connects the output terminal of controller unit, shows the numerical information of detected analog quantity.
3. according to the described a kind of pressure detection of claim 1 and holding circuit; it is characterized in that described simulating signal generating unit is pressure transducer; employing has highly sensitive; the electric bridge that low temperature floats characteristic detects the structure of trickle change in electric, and it is transferred to the analog signal processing circuit unit with pressure signal.
4. according to the described a kind of pressure detection of claim 1 and holding circuit; it is characterized in that described analog signal processing circuit unit is operational amplification circuit; with the analog signals of input amplify, computing, and output it to the A/D conversion circuit unit and carry out signal conversion.
5. according to the described a kind of pressure detection of claim 1 and holding circuit, it is characterized in that described controller unit is to be made of microprogram control unit unit, communication unit, I/O interface unit and peripheral controllers unit; The input end of described microprogram control unit unit receives the digital quantity signal that the A/D conversion circuit unit sends, its output terminal is two-way by communication unit with the peripheral controllers unit and is connected, and by the I/O interface unit signal is passed to the peripheral controllers unit simultaneously; The output terminal of described microprogram control unit unit connects the input end of numerical value display unit; The output terminal of described peripheral controllers unit connects plant equipment to be detected.
6. according to the described a kind of pressure detection of claim 5 and holding circuit, it is characterized in that described microprogram control unit unit is PLC, single-chip microcomputer or DSP; Described peripheral controllers unit is PLC, single-chip microcomputer or DSP; What adopt between described microprogram control unit unit and the peripheral controllers unit is catechetical communication modes.
7. according to the described a kind of pressure detection of claim 5 and holding circuit, it is characterized in that described communication unit is the RS485 bus unit.
8. according to claim 2 or 5 described a kind of pressure detection and holding circuits, it is characterized in that described numerical value display unit is LCD LCD or light-emitting diode display.
9. the method for work of a pressure detection and holding circuit is characterized in that it may further comprise the steps:
1. the simulating signal generating unit detects plant equipment to be detected, gathered the analog signals of simulating signal generating unit by the analog signal processing circuit unit, it is carried out calculation process, undesired signal filtering with the lopsided pulse in the signal and space transmission obtains a comparatively stable analog signals;
2. the analog signals after the processing that 1. obtains of step converts digital quantity signal at the A/D conversion circuit unit, outputs it to the microprogram control unit unit in the controller unit;
3. after the microprogram control unit unit carried out the filtering interference to the digital quantity signal that collects, the value of averaging was calculated, and known quantity substitution formula (1) and the formula (2) to this mean value and user's input calculates current force value then:
y
l=kx
1+b （1）
y
2=kx
2+b （2）
Wherein: y
2Be maximum pressure value, y
1Be minimum pressure values, x
2Be sensor largest deformation amount, x
1Be the minimum deformation quantity of sensor, K is slope, and b is the biasing constant; The force value that calculates and pre-set reference value are compared;
4. the result after 3. the processing of gained is calculated by step will show at the display screen of numerical value display unit;
5. the result after 3. the processing of gained is calculated as if step has exceeded pre-set reference value, will produce alerting signal;
6. the microprogram control unit unit can pass to the peripheral controllers unit with alerting signal by the I/O interface unit, and action control can be made to plant equipment to be detected according to signal in this unit, treats checkout equipment gas and has arrived protective effect;
7. the microprogram control unit unit also can carry out communication by communication unit and peripheral controllers unit; 3. the result after the processing of gained is calculated with step passes to the peripheral controllers unit; the peripheral controllers unit also can be handled these data; if the result who handles is not in setting range; also warning can be produced, the effect of protection can be played equally.
10. according to the method for work of the described a kind of pressure detection of claim 9 and holding circuit, it is characterized in that the analog signal processing circuit unit during described step is 1. adopts the operational amplification circuit structure, the signal that comes amplifies to gathering, computing and shaping are handled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101507930A CN103278266A (en) | 2013-04-26 | 2013-04-26 | Pressure detection and protection circuit and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101507930A CN103278266A (en) | 2013-04-26 | 2013-04-26 | Pressure detection and protection circuit and working method thereof |
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|---|---|
| CN103278266A true CN103278266A (en) | 2013-09-04 |
Family
ID=49060851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101507930A Pending CN103278266A (en) | 2013-04-26 | 2013-04-26 | Pressure detection and protection circuit and working method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104742514A (en) * | 2015-02-26 | 2015-07-01 | 重庆宏劲印务有限责任公司 | Detection method for hot stamping pressure |
| CN109682410A (en) * | 2017-10-19 | 2019-04-26 | 江苏扬航光电科技有限公司 | A kind of single-pass data acquisition device |
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| CN2864627Y (en) * | 2006-01-20 | 2007-01-31 | 梅特勒-托利多(常州)称重设备***有限公司 | Control circuit for intelligent weighing sensor |
| CN201335970Y (en) * | 2008-12-05 | 2009-10-28 | 中山市钜通机电技术有限公司 | Dedicated controller for rubber products |
| CN201548854U (en) * | 2009-08-20 | 2010-08-11 | 大连理工大学 | Full-automatic high-precision tension force control instrument |
| CN203287128U (en) * | 2013-04-26 | 2013-11-13 | 天津长荣印刷设备股份有限公司 | Pressure detection and protection circuit |
-
2013
- 2013-04-26 CN CN2013101507930A patent/CN103278266A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2864627Y (en) * | 2006-01-20 | 2007-01-31 | 梅特勒-托利多(常州)称重设备***有限公司 | Control circuit for intelligent weighing sensor |
| CN201335970Y (en) * | 2008-12-05 | 2009-10-28 | 中山市钜通机电技术有限公司 | Dedicated controller for rubber products |
| CN201548854U (en) * | 2009-08-20 | 2010-08-11 | 大连理工大学 | Full-automatic high-precision tension force control instrument |
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Non-Patent Citations (1)
| Title |
|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104742514A (en) * | 2015-02-26 | 2015-07-01 | 重庆宏劲印务有限责任公司 | Detection method for hot stamping pressure |
| CN109682410A (en) * | 2017-10-19 | 2019-04-26 | 江苏扬航光电科技有限公司 | A kind of single-pass data acquisition device |
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Application publication date: 20130904 |