CN203287128U - Pressure detection and protection circuit - Google Patents
Pressure detection and protection circuit Download PDFInfo
- Publication number
- CN203287128U CN203287128U CN2013202175590U CN201320217559U CN203287128U CN 203287128 U CN203287128 U CN 203287128U CN 2013202175590 U CN2013202175590 U CN 2013202175590U CN 201320217559 U CN201320217559 U CN 201320217559U CN 203287128 U CN203287128 U CN 203287128U
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- pressure detection
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- peripheral controllers
- holding circuit
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Abstract
A pressure detection and protection circuit is characterized by comprising an analog signal generation unit, an analog signal processing circuit unit, an A/D conversion circuit unit and a controller. The pressure detection and protection circuit has the advantages of wide application range, small error, good man-machine interaction, strong expansibility, safety and reliability, and stable protection.
Description
(1) technical field:
The utility model belongs to detection and the protection field that prints rear industry plant equipment (as die-cutting machine, gilding press etc.), especially a kind of pressure detection and holding circuit.
(2) background technology:
In long period of time, print pressure detection and protective device that rear industry is used in the past, the problem of temperature drift, low precision and holding circuit misoperation easily occurs in actual use.The safe handling of machinery can not be effectively protected because the existence of these problems causes this device, technologic requirement can not be met.So a kind of reliable high-precision pressure detection of exigence and protective device in industry after seal.
(3) utility model content:
The purpose of this utility model is to provide a kind of pressure detection and holding circuit; it can overcome the shortcoming of existing pressure detection circuit precision deficiency; be a kind of simple in structure, easy to operate, circuit that precision is high, its control method is easy-to-understand, and can effectively to pressure, detect and early warning.
The technical solution of the utility model: 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 gathers 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, and employing has highly sensitive, and the electric bridge of Low Drift Temperature 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 by microprogram control unit unit, communication unit, I/O interface unit and peripheral controllers cell formation; 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 peripheral controllers unit is catechetical communication modes.
Described numerical value display unit is LCD(Liquid Crystal Display---liquid crystal display) or LED(Light-Emitting Diode---light emitting diode) display.
The course of work of the present utility model:
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 signal and space transmission, obtain 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 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 then known quantity substitution formula (1) and the formula (2) of this mean value and user's input is calculated current force value:
y
1＝kx
1+b （1）
y
2=kx
2+b （2）
Wherein: y
2For maximum pressure value, y
1For minimum pressure values, x
2For sensor largest deformation amount, x
1For 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 be in the demonstration screen display of numerical value display unit;
, if 5. the result of step after 3. the processing of gained is calculated 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 processed these data; if the result of processing 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 Shape correction.
Superiority of the present utility model is: 1, the early warning range property set, this circuit adopt artificial setting means on pressure setting, but free setting pressure early warning range makes 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 the impact of temperature on sampled signal; 3, good man-machine interface, have 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 completed some logic controls, and communication unit can carry out the multi-computer communication task, enlarges protection domain, strengthens safety coefficient; 5, high stability, have dual power supply system, and the microprogram control unit unit powers separately, 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 utility model and holding circuit.
(5) embodiment:
Embodiment: a kind of pressure detection and holding circuit (see photo) 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 gathers 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 (see photo), 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 (see photo) is pressure transducer, and employing has highly sensitive, and the electric bridge of Low Drift Temperature 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 (see photo) 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 (see photo) is by microprogram control unit unit, communication unit, I/O interface unit and peripheral controllers cell formation; 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 (see photo) is single-chip microcomputer.
Described communication unit (see photo) is the RS485 bus unit.
Described peripheral controllers unit (see photo) is PLC.
What adopt between described microprogram control unit unit and peripheral controllers unit is catechetical communication modes (see photo).
Described numerical value display unit is the LCD liquid crystal display.
The course of work of the present embodiment:
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 signal and space transmission, obtain 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 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 then known quantity substitution formula (1) and the formula (2) of this mean value and user's input is calculated current force value:
y
1=kx
1+b （1）
y
2＝kx
2+b （2）
Wherein: y
2For maximum pressure value, y
1For minimum pressure values, x
2For sensor largest deformation amount, x
1For 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 be in the demonstration screen display of numerical value display unit;
, if 5. the result of step after 3. the processing of gained is calculated 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 processed these data; if the result of processing 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 Shape correction.
Claims (8)
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 gathers 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. a kind of pressure detection and holding circuit according to claim 1; 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. a kind of pressure detection and holding circuit according to claim 1; it is characterized in that described simulating signal generating unit is pressure transducer; employing has highly sensitive; the electric bridge of Low Drift Temperature characteristic detects the structure of trickle change in electric, and it is transferred to the analog signal processing circuit unit with pressure signal.
4. a kind of pressure detection and holding circuit according to claim 1; 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. a kind of pressure detection and holding circuit according to claim 1, is characterized in that described controller unit is by microprogram control unit unit, communication unit, I/O interface unit and peripheral controllers cell formation; 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. a kind of pressure detection and holding circuit according to claim 5, 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 peripheral controllers unit is catechetical communication modes.
7. a kind of pressure detection and holding circuit according to claim 5, 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, is characterized in that described numerical value display unit is LCD liquid crystal display or light-emitting diode display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202175590U CN203287128U (en) | 2013-04-26 | 2013-04-26 | Pressure detection and protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202175590U CN203287128U (en) | 2013-04-26 | 2013-04-26 | Pressure detection and protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203287128U true CN203287128U (en) | 2013-11-13 |
Family
ID=49543484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202175590U Expired - Lifetime CN203287128U (en) | 2013-04-26 | 2013-04-26 | Pressure detection and protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203287128U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107046275A (en) * | 2017-04-06 | 2017-08-15 | 广州龙之杰科技有限公司 | A kind of Medical Devices air pressure duplicate protection system and method |
-
2013
- 2013-04-26 CN CN2013202175590U patent/CN203287128U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107046275A (en) * | 2017-04-06 | 2017-08-15 | 广州龙之杰科技有限公司 | A kind of Medical Devices air pressure duplicate protection system and method |
| CN107046275B (en) * | 2017-04-06 | 2019-05-24 | 广州龙之杰科技有限公司 | A kind of Medical Devices air pressure duplicate protection system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 300400 Beichen science and Technology Industrial Park, Tianjin New Technology Industrial Park, Beichen Patentee after: Masterwork Group Co.,Ltd. Address before: 300400 Beichen City, Beichen science and Technology Industrial Park, Tianjin, Chen Chen Road, No. 11 Patentee before: MASTERWORK MACHINERY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131113 |