CN201122249Y - Thermal couple or piezoresistance type two-wire system temperature or pressure switch - Google Patents
Thermal couple or piezoresistance type two-wire system temperature or pressure switch Download PDFInfo
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- CN201122249Y CN201122249Y CNU2007201277676U CN200720127767U CN201122249Y CN 201122249 Y CN201122249 Y CN 201122249Y CN U2007201277676 U CNU2007201277676 U CN U2007201277676U CN 200720127767 U CN200720127767 U CN 200720127767U CN 201122249 Y CN201122249 Y CN 201122249Y
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- temperature
- pressure
- pressure switch
- module
- switch control
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Abstract
The utility model discloses a thermoelectric couple or piezoresistive two-wire temperature or pressure switch, which comprises a temperature measurer or a pressure sensor, and a temperature or pressure switch control integrated circuit block connected with the temperature measurer or the pressure sensor. The temperature or pressure switch control integrated circuit block comprises a measurement module, an amplification module, a comparison module, a modification module, a return difference adjusting module, a time delay module and a switch control output module for the temperature or pressure, wherein, the input interfaces of the temperature measurer or the pressure sensor and the temperature or pressure switch control integrated circuit block are connected with the input end of the measurement module; and the output interface of the temperature or pressure switch control integrated circuit block, i.e. the output end of the switch control output module is connected with a control piece through a control wire. The thermoelectric couple or piezoresistive two-wire temperature or pressure switch has the advantages of small volume, high reliability, low power consumption, wide working voltage, high cost performance and convenient use.
Description
Technical field:
The utility model relates to a kind of temperature or pressure switch; Relate in particular to a kind of temperature or pressure switch of integrated control.
Background technology:
In many actual temperatures or pressure control application, the user also is indifferent to concrete temperature or force value, and what be concerned about is whether temperature or pressure is too high or too low, and whether the oil temperature temperature whether too high, the production run medium in, the oil system whether too high as the temperature in the motor windings is too high or too low.Conventional temperature or pressure detection scheme adopt mechanical temperature or pressure switch to realize mostly, have poor reliability, interchangeability is poor, the protection action is slow, the ratio of performance to price is low, the shortcoming of Maintenance and Repair verification difficulty.
The utility model content:
In order to overcome the poor reliability of existing mechanical temperature or pressure switch controller, circuit complexity, the technical deficiency of interchangeability difference; The purpose of this utility model provides thermoelectricity that a kind of various circuit with the control of temperature or pressure switch are integrated into an integrated package occasionally pressure resistance type two line system temp or pressure switch, adopt electric current to amplify change and send output, reflect by the two-stage current value in the control loop whether temperature is normal.
For realizing that the technical scheme that the utility model purpose is taked is:
A kind of thermoelectricity is pressure resistance type two line system temp or pressure switch occasionally, comprises temperature element or pressure transducer, it is characterized in that: be provided with a temperature that is connected with temperature element or pressure transducer or pressure switch control integrated circuit piece; Comprise measurement module, amplification module, comparison module, correcting module, return difference adjustment module, time delays module, switch control output module in temperature or the pressure switch control integrated circuit piece to temperature or pressure; Wherein the input interface of temperature element or pressure transducer and temperature or pressure switch control integrated circuit piece promptly is connected with the measurement module input end; And the output interface of temperature or pressure switch control integrated circuit piece, i.e. the output terminal of switch control output module is connected with control piece through control line.
Described temperature element or pressure transducer are respectively thermocouple temperature measurement element or piezoresistive transducer.
The output terminal of described switch control output module is connected with control piece through the two-wire system control line.
If described is remote temperature or pressure switch control, inquiry voltage is through voltage changer, its positive pole is connected with temperature or the voltage input end of pressure switch control integrated circuit piece, the collector of triode respectively, the voltage output end of emitter and temperature or pressure switch control integrated circuit piece connects, and base stage is connected with a Current Control output terminal of temperature or pressure switch control integrated circuit piece.
Described switch control output module is connected with DCS switching value inputting modular unit through control line.
Described switch control output module is connected with high-power output module through control line.
The beneficial effects of the utility model are: have that volume is little, reliability is high, low in energy consumption, operating voltage is wide, the ratio of performance to price is high, use simple advantage; Typical threshold temperature accuracy ± 0.5 ℃, and optional 2 ℃ of-20 ℃ of temperature hysteresis, pressure precision 0.2%, and optional 2%-10% pressure hysteresis satisfy most temperature or pressure controlled requirement.
Description of drawings:
Fig. 1 is the structured flowchart of the utility model embodiment;
Fig. 2 is the remote temperature of the utility model embodiment or the circuit theory diagrams of pressure switch control;
Fig. 3 is the structural representation that the utility model embodiment is connected with DCS switching value inputting modular unit;
Fig. 4 is the structural representation that the utility model embodiment is connected with high-power output module.
Embodiment:
Below in conjunction with drawings and Examples the utility model is described in further detail.
As shown in Figure 1, the utility model comprises thermocouple temperature measurement element or piezoresistive transducer, is provided with a temperature that is being connected with thermocouple temperature measurement element or piezoresistive transducer or pressure switch control integrated circuit piece.Comprise measurement module, amplification module, comparison module, correcting module, return difference adjustment module, time delays module, switch control output module in temperature or the pressure switch control integrated circuit piece to temperature or pressure.
Wherein thermocouple temperature measurement element or piezoresistive transducer and temperature or pressure switch control integrated circuit piece input interface promptly are connected with the measurement module input end.The output interface of temperature or pressure switch control integrated circuit piece, i.e. the output terminal of switch control output module is connected with control piece through control line.
The integrated circuit that principle of work adopt to be solidified to temperature/pressure measure, amplify, comparison, correction, return difference regulate and the time delay circuit, after isolate the output make-and-break signal, realize temperature control or report to the police.
Principal feature:
The switch motion point: the range ability default value is adjustable arbitrarily and return difference is accurately adjustable.
Embody the high stability and the long-life technology index of thermopair/piezoresistance sensor two line system temp/pressure switch:
Measurement range: temperature :-40-1200 ℃; Pressure: ± 5KPa, 3MPa, 30Mpa;
Electric interfaces: M20 * 1.5;
Pillar and process connect material: 316 stainless steels/special material, and standard and special requirement are optional;
Degree of protection: IP65;
Environment temperature :-20～120 ℃;
Ambient humidity: 0～95%RH;
Contact endurance: unlimited;
Contact capacity: 20mA (specific (special) requirements, high-power optional);
Precision: ± 0.5 ℃ (representative value, standard couple precision); ± 0.2% (piezoresistance sensor representative value);
Power supply: need not power supply;
Inquiry voltage: 24V.DC ± 10%, power consumption≤0.01mW;
Inquiry voltage: 48V.DC ± 10%, power consumption≤0.01mW;
Inquiry voltage: 120V.DC ± 10%, power consumption≤0.01mW (future products);
Inquiry voltage 220V.AC ± 10%, power consumption≤0.01mW (future products).
As shown in Figure 2, for improving the anti-jamming capacity of remote temperature or pressure switch, Ben Wendu or pressure switch adopt electrorheological to send output, reflect by the two-stage current value in the control loop whether temperature is normal.Temperature or pressure switch control integrated circuit piece are connected in the triode current discharge road of temperature or pressure survey electric current.Inquiry voltage is through voltage changer, its positive pole is connected with temperature or the voltage input end of pressure switch control integrated circuit piece, the collector of triode respectively, the voltage output end of emitter and temperature or pressure switch control integrated circuit piece connects, and base stage is connected with a Current Control output terminal of temperature or pressure switch control integrated circuit piece.
As shown in Figure 3, switch control output module is connected with DCS switching value inputting modular unit through control line.
As shown in Figure 4, switch control output module is connected with high-power output module through control line.
Claims (6)
1. occasionally pressure resistance type two line system temp or pressure switch of a thermoelectricity comprises temperature element or pressure transducer, it is characterized in that: be provided with a temperature that is connected with temperature element or pressure transducer or pressure switch control integrated circuit piece; Comprise measurement module, amplification module, comparison module, correcting module, return difference adjustment module, time delays module, switch control output module in temperature or the pressure switch control integrated circuit piece to temperature or pressure; Wherein the input interface of temperature element or pressure transducer and temperature or pressure switch control integrated circuit piece promptly is connected with the measurement module input end; And the output interface of temperature or pressure switch control integrated circuit piece, i.e. the output terminal of switch control output module is connected with control piece through control line.
2. a kind of thermoelectricity according to claim 1 is pressure resistance type two line system temp or pressure switch occasionally, it is characterized by: temperature element or pressure transducer are respectively thermocouple temperature measurement element or piezoresistive transducer.
3. a kind of thermoelectricity according to claim 1 is pressure resistance type two line system temp or pressure switch occasionally, it is characterized by: the output terminal of switch control output module is connected with control piece through the two-wire system control line.
4. a kind of thermoelectricity according to claim 1 is pressure resistance type two line system temp or pressure switch occasionally, it is characterized by: when switch is controlled to be remote temperature or pressure switch control, inquiry voltage is through voltage changer, its positive pole is connected with temperature or the voltage input end of pressure switch control integrated circuit piece, the collector of triode respectively, emitter is connected with temperature or pressure switch control integrated circuit piece voltage output end, and base stage is connected with a Current Control output terminal of temperature or pressure switch control integrated circuit piece.
5. a kind of thermoelectricity according to claim 3 is pressure resistance type two line system temp or pressure switch occasionally, it is characterized by: switch control output module is connected with DCS switching value inputting modular unit through control line.
6. a kind of thermoelectricity according to claim 3 is pressure resistance type two line system temp or pressure switch occasionally, it is characterized by: switch control output module is connected with high-power output module through control line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201277676U CN201122249Y (en) | 2007-08-10 | 2007-08-10 | Thermal couple or piezoresistance type two-wire system temperature or pressure switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201277676U CN201122249Y (en) | 2007-08-10 | 2007-08-10 | Thermal couple or piezoresistance type two-wire system temperature or pressure switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201122249Y true CN201122249Y (en) | 2008-09-24 |
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ID=40009484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201277676U Expired - Lifetime CN201122249Y (en) | 2007-08-10 | 2007-08-10 | Thermal couple or piezoresistance type two-wire system temperature or pressure switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201122249Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529721A (en) * | 2013-10-10 | 2014-01-22 | 吴鹤春 | Passive electronic differential pressure switch |
| CN103529873A (en) * | 2013-10-10 | 2014-01-22 | 吴鹤春 | Passive electronic temperature switch |
| CN103823391A (en) * | 2013-10-10 | 2014-05-28 | 吴鹤春 | Passive electronic pressure switch |
| CN110160482A (en) * | 2019-04-26 | 2019-08-23 | 云南电网有限责任公司电力科学研究院 | The measurement method and device of cable insulation damaged area under a kind of hypobaric |
-
2007
- 2007-08-10 CN CNU2007201277676U patent/CN201122249Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529721A (en) * | 2013-10-10 | 2014-01-22 | 吴鹤春 | Passive electronic differential pressure switch |
| CN103529873A (en) * | 2013-10-10 | 2014-01-22 | 吴鹤春 | Passive electronic temperature switch |
| CN103823391A (en) * | 2013-10-10 | 2014-05-28 | 吴鹤春 | Passive electronic pressure switch |
| CN103529721B (en) * | 2013-10-10 | 2016-02-24 | 吴鹤春 | Passive electronic differential pressure switch |
| CN110160482A (en) * | 2019-04-26 | 2019-08-23 | 云南电网有限责任公司电力科学研究院 | The measurement method and device of cable insulation damaged area under a kind of hypobaric |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080924 |
|
| CX01 | Expiry of patent term |