CN200962040Y - Dual loop measurement display control instrument - Google Patents
Dual loop measurement display control instrument Download PDFInfo
- Publication number
- CN200962040Y CN200962040Y CN 200520128446 CN200520128446U CN200962040Y CN 200962040 Y CN200962040 Y CN 200962040Y CN 200520128446 CN200520128446 CN 200520128446 CN 200520128446 U CN200520128446 U CN 200520128446U CN 200962040 Y CN200962040 Y CN 200962040Y
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- China
- Prior art keywords
- value
- relay
- limit alarm
- lower limit
- control unit
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- Expired - Fee Related
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Abstract
A two circuit measuring display controller relates to industrial automation instruments, particularly applicable to the measuring display control of the temperature, pressure, velocity, liquid level signals and the likes, characterized in that the CPU comprises a memory used to store the upper, lower limit alarm values and the return difference value, an arithmetic unit used to process the two circuit input signals, and a control unit, wherein the control unit can read the upper, lower limit alarm values and the return difference value from the memory, and then compares them with the real-time calculated values in the arithmetic unit, after that the control unit can output the high, low voltage signals to control the two circuit relay. When the real-time calculated value from the first path or the second path of the arithmetic unit is higher than the upper limit alarm value or lower than the lower limit alarm value, the control unit will output 5v DC high voltage signal into the relay to close the contact, thereby switching the normally on state to the normally off state. When the real-time calculated value from the second path of the arithmetic unit is lower than the upper limit alarm value minus the return difference value stored in the memory or higher than the lower limit alarm value plus the return difference value stored in the memory, the control unit will output 0v DC signal to keep the relay normally on.
Description
Technical field:
The utility model relates to industrial instrument and meter for automation, and the measurement that is specially adapted to signals such as temperature, pressure, liquid level, speed shows control.
Background technology:
Measure the demonstration controller at present and mainly be made up of signal input part, A/D converter, central processor CPU, display, relay etc., CPU is by arithmetical unit, and controller, storer are formed.Can measure demonstration to measuring-signal, and can provide control signal to relay, the direct control executing mechanism of relay is carried out work, satisfies the work requirements of conventional stational system.But in the real work, there are two problems:
1, measuring the demonstration controller at present only has to measure a passage, and the topworks that can control is limited, and the mechanism that engineering site will be monitored has a lot, pairing topworks is more, show controller if all adopt single pass measurement, not only finished product is high, and uses loaded down with trivial details.
Frequent movement problem when 2, the output critical point is fluctuateed up and down, topworks starts repeatedly when critical point is fluctuateed up and down and stops, and so just causes many topworkies cisco unity malfunction, causes the control system paralysis easily.
The utility model content:
The purpose of this utility model is in order to overcome above-mentioned defective, to provide a kind of and also can take back poor novel two-circuit measurement demonstration controller by the direct pilot relay output of CPU processor switching value signal.Its technical solution is: the two-circuit is measured and is shown controller, comprising: keyboard, signal input part (1), signal input part (2), A/D converter, two light-emitting diode display, relay, CPU processor; It is characterized in that: signal input part (1), signal input part (2) link to each other with A/D converter, and A/D converter, keyboard link to each other with CPU respectively, and CPU links to each other with two light-emitting diode displays, relay again simultaneously; The CPU processor is characterized in that inside also comprises: linking to each other with arithmetical unit is used to store the storer of upper and lower limit alarming value and return difference value; Link to each other with controller and to be used for input signal is carried out the arithmetical unit of calculation process; Linking to each other with storer, arithmetical unit is used for accessing upper and lower limit alarming value and return difference value in storer, and compares with the real-time operation value in the arithmetical unit and then to export the controller that high and low level signal is controlled relay;
This controller is controlled following operation: when first and second passage real-time measurement values of arithmetical unit than storer in high alarm setting value height or lower limit when low, controller output high level signal is delivered to first and second passage upper limit or lower limit alarm relay, drive its closing of contact, realize becoming normally off by normally open; When first and second passage real-time measurement values of arithmetical unit than storer in the high alarm setting value subtract the low or measured value of return difference value than storer in low alarm limit value add-back difference when high, controller output low level signal makes first and second passage upper limit or lower limit relay remain on normally open;
The utility model advantage is to adopt up-to-date microprocessor to handle two groups of signals, partly introduced the double-channel signal collection plate in input, and on display, increased the two LED display boards of one group of high brightness than common survey display instrument, can show the real-time measurement values of two passages simultaneously.The difference relay control way of output is taken back in employing, solve the repeatedly startup of topworks when critical point is fluctuateed up and down and stopped problem, the user can rule of thumb be provided with upper and lower limit alarming value and return difference value on the instrument keyboard, the value of putting divided in CPU storer record, just can output signal to relay to reach accurate control according to concrete control alarming value and return difference value during controller work.
Description of drawings: accompanying drawing is measured for the utility model two-circuit and is shown controller structure block diagram.
Embodiment:
The two-circuit is measured and is shown controller, comprising: keyboard, signal input part (1), signal input part (2), A/D converter, two light-emitting diode display, relay, CPU processor; It is characterized in that: signal input part (1), signal input part (2) link to each other with A/D converter, and A/D converter, keyboard link to each other with CPU respectively, and CPU links to each other with two light-emitting diode displays, relay again simultaneously; The CPU processor is characterized in that inside also comprises: linking to each other with arithmetical unit is used to store the storer of upper and lower limit alarming value and return difference value; Link to each other with controller and to be used for input signal is carried out the arithmetical unit of calculation process; Linking to each other with storer, arithmetical unit is used for accessing upper and lower limit alarming value and return difference value in storer, and compares with the real-time operation value in the arithmetical unit and then to export the controller that high and low level signal is controlled relay;
This controller is controlled following operation:
When first and second passage real-time measurement values of arithmetical unit than storer in high alarm setting value height or lower limit when low, controller output high level signal is delivered to first and second passage upper limit or lower limit alarm relay, drive its closing of contact, realize becoming normally off by normally open; When first and second passage real-time measurement values of arithmetical unit than storer in the high alarm setting value subtract the low or measured value of return difference value than storer in low alarm limit value add-back difference when high, controller output low level signal makes first and second passage upper limit or lower limit relay remain on normally open; Normally-open normally-close can be selected for use voluntarily by the user.
Claims (2)
1, a kind of two-circuit is measured and is shown controller, comprising: keyboard, signal input part (1), signal input part (2), A/D converter, two light-emitting diode display, relay, CPU processor; It is characterized in that: signal input part (1), signal input part (2) link to each other with A/D converter, and A/D converter, keyboard link to each other with CPU respectively, and CPU links to each other with two light-emitting diode displays, relay again simultaneously.
2, CPU processor according to claim 1 is characterized in that: CPU processor inside also includes: the storer that links to each other with arithmetical unit, the arithmetical unit that links to each other with controller, the controller that links to each other with storer, arithmetical unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520128446 CN200962040Y (en) | 2005-10-09 | 2005-10-09 | Dual loop measurement display control instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520128446 CN200962040Y (en) | 2005-10-09 | 2005-10-09 | Dual loop measurement display control instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200962040Y true CN200962040Y (en) | 2007-10-17 |
Family
ID=38798558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520128446 Expired - Fee Related CN200962040Y (en) | 2005-10-09 | 2005-10-09 | Dual loop measurement display control instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200962040Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI579665B (en) * | 2015-03-26 | 2017-04-21 | Azbil Corp | Control device and control method |
| CN110544462A (en) * | 2019-10-16 | 2019-12-06 | 广东科瑞德电气科技有限公司 | Double-loop display output circuit of intelligent instrument |
-
2005
- 2005-10-09 CN CN 200520128446 patent/CN200962040Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI579665B (en) * | 2015-03-26 | 2017-04-21 | Azbil Corp | Control device and control method |
| CN110544462A (en) * | 2019-10-16 | 2019-12-06 | 广东科瑞德电气科技有限公司 | Double-loop display output circuit of intelligent instrument |
| CN110544462B (en) * | 2019-10-16 | 2024-06-11 | 广东科瑞德电气科技有限公司 | Dual-circuit display output circuit of intelligent instrument |
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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: 20071017 Termination date: 20131009 |