CN203534759U - Differential pressure transformer having two paths of alarm outputs - Google Patents
Differential pressure transformer having two paths of alarm outputs Download PDFInfo
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- CN203534759U CN203534759U CN201320663742.3U CN201320663742U CN203534759U CN 203534759 U CN203534759 U CN 203534759U CN 201320663742 U CN201320663742 U CN 201320663742U CN 203534759 U CN203534759 U CN 203534759U
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- differential pressure
- resistance
- triode
- chip microcomputer
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Abstract
A differential pressure transformer having two alarm outputs comprises a differential pressure sensor, a central processor, an isolating circuit, a current output circuit, the alarm outputs and a relay drive unit. The differential pressure transformer is characterized in that the differential pressure sensor, the central processor, the isolating circuit and the current output circuit are connected in order, the alarm outputs are connected with the central processor, and the relay drive unit is connected with the alarm output. The differential pressure transformer is advantageous in that integrated design is adopted, and objects of pressure acquisition and pressure adjusting control are achieved; reliability of pressure control adjustments is improved, and occurrence of the problem of design complexity existing in pressure control links, occurrence of the problem of obstacle eliminating difficulty and occurrence of other problems are reduced; and design of on-site control instruments or control circuits is reduced, and design cost is greatly lowered.
Description
Technical field
The utility model relates to transmitter field, the differential pressure transmitter that particularly a kind of two-way is reported to the police and exported.
Background technology
In manometer, the output of 4-20mA electric current is the current the most frequently used simulation way of output, is generally used for the continuous monitoring of differential pressure amount.If scene need to arrange, differential pressure is reported to the police or the output of differential pressure switch amount, needs to configure a digital display control instrument in addition, realizes report to the police output or switching value output function.But still there is the shortcoming that debugging is inconvenient, potential faults is many, cost is high in existing transmitter.
Summary of the invention
The purpose of this utility model is in order to address the above problem, and has designed the differential pressure transmitter that a kind of two-way is reported to the police and exported.Specific design scheme is:
The differential pressure transmitter that a kind of two-way is reported to the police and exported, comprise that differential pressure pick-up, central processing unit, buffer circuit, current output circuit, warning output, relay drive, described differential pressure pick-up, central processing unit, buffer circuit, current output circuit are connected successively, described warning output is connected with central processing unit, described relay drives with described warning output and is connected, in warning circuit, warning input end R51 is connected in the base stage of triode Q1; Collector respectively resistance in series R68 and R52 is connected in the base stage and collector of another triode Q2, the emitter of Q1 be connected in analog, the emitter of Q2 is connected with thermistor PTC1, the other end of PTC1 is connected on terminal J1; The second tunnel warning output is consistent with first via principle, warning input end R54 is connected with the base stage of triode Q3, collector respectively resistance in series R69 and R55 is connected in the base stage and collector of another triode Q4, the emitter of Q3 be connected in analog, the emitter of Q4 is connected with thermistor PTC2, and the other end of PTC2 is connected on terminal J2; While triode Q2, the emitter of Q4 is connected with signal ground.
In differential pressure pick-up, VCC is connected to 4 pin VDD of single-chip microcomputer above as power supply input, sensor resistance R1, be connected with the tripod INA-of single-chip microcomputer, R2 is connected with the 5th pin INB+ of single-chip microcomputer, and R3 is connected with the first pin OUTA of single-chip microcomputer, and R4 is connected with the tenth pin INC+ of single-chip microcomputer; The crus secunda of single-chip microcomputer, tripod, the 4th pin is also connected to the ground simultaneously; Output terminal: 14 pin OUTD, ten tripod IND-are connected to the two ends of resistance; The 6th pin INB-is connected with resistance one end with the 7th pin OUTB short circuit, octal OUTC, and the 9th pin INC-, the 12 pin IND+ is connected with resistance respectively, and the other end of resistance is connected to the ground; The 11 pin VSS is connected to the ground.
During relay drives, resistance R is connected with light emitting diode, LED lighting, and through optocoupler, effect passes the signal along to right-hand member; VCC is connected with resistance, and resistance is connected with diode, diode respectively with the base stage of triode Q be connected in analog, the collector of triode is connected with relay, relay is connected with power supply VCC.
The differential pressure transmitter that the two-way obtaining by above-mentioned design proposal of the present utility model is reported to the police and exported, its beneficial effect is:
Integrated design, realizes pressure acquisition, and pressure regulates the object of controlling; Improve the reliability of pressure regulating and controlling, reduced the design complexity that pressure controlling unit exists, the generation of the problems such as removal of obstacle difficulty.Reduce the design of field controlling instrument or control circuit, greatly reduced design cost.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the differential pressure variator of two-way warning output described in the utility model;
Fig. 2 is the circuit diagram of differential pressure pickup described in the utility model;
Fig. 3 is the circuit diagram of warning output described in the utility model;
Fig. 4 is the circuit diagram that relay described in the utility model drives.
Embodiment
Below in conjunction with accompanying drawing, the utility model is specifically described.
Fig. 1 is the theory diagram of the differential pressure variator of two-way warning output described in the utility model; Fig. 3 is the circuit diagram of warning output described in the utility model, as shown in Figure 1, Figure 3, the differential pressure transmitter that a kind of two-way is reported to the police and exported, comprise that differential pressure pick-up, central processing unit, buffer circuit, current output circuit, warning output, relay drive, described differential pressure pick-up, central processing unit, buffer circuit, current output circuit are connected successively, described warning output is connected with central processing unit, described relay drives with described warning output and is connected, in warning circuit, warning input end R51 is connected in the base stage of triode Q1; Collector respectively resistance in series R68 and R52 is connected in the base stage and collector of another triode Q2, the emitter of Q1 be connected in analog, the emitter of Q2 is connected with thermistor PTC1, the other end of PTC1 is connected on terminal J1; The second tunnel warning output is consistent with first via principle, warning input end R54 is connected with the base stage of triode Q3, collector respectively resistance in series R69 and R55 is connected in the base stage and collector of another triode Q4, the emitter of Q3 be connected in analog, the emitter of Q4 is connected with thermistor PTC2, and the other end of PTC2 is connected on terminal J2; While triode Q2, the emitter of Q4 is connected with signal ground.
Fig. 2 is the circuit diagram of differential pressure pickup described in the utility model, as shown in Figure 2, in differential pressure pick-up, the 4 pin VDD that VCC is connected to single-chip microcomputer above input as power supply, sensor resistance R1, is connected with the tripod INA-of single-chip microcomputer, and R2 is connected with the 5th pin INB+ of single-chip microcomputer, R3 is connected with the first pin OUTA of single-chip microcomputer, and R4 is connected with the tenth pin INC+ of single-chip microcomputer; The crus secunda of single-chip microcomputer, tripod, the 4th pin is also connected to the ground simultaneously; Output terminal: 14 pin OUTD, ten tripod IND-are connected to the two ends of resistance; The 6th pin INB-is connected with resistance one end with the 7th pin OUTB short circuit, octal OUTC, and the 9th pin INC-, the 12 pin IND+ differentiates and is connected with resistance, and the other end of resistance is connected to the ground; The 11 pin VSS is connected to the ground.
Fig. 4 is the circuit diagram that relay described in the utility model drives, and as shown in the figure, during relay drives, resistance R is connected with light emitting diode, LED lighting, and through optocoupler, effect passes the signal along to right-hand member; VCC is connected with resistance, and resistance is connected with diode, diode respectively with the base stage of triode Q be connected in analog, the collector of triode is connected with relay, relay is connected with power supply VCC.
Technique scheme has only embodied the optimal technical scheme of technical solutions of the utility model; those skilled in the art have all embodied principle of the present utility model to some changes that wherein some part may be made, within belonging to protection domain of the present utility model.
Claims (3)
1. the two-way differential pressure transmitter of output of reporting to the police, comprise that differential pressure pick-up, central processing unit, buffer circuit, current output circuit, warning output, relay drive, it is characterized in that, described differential pressure pick-up, central processing unit, buffer circuit, current output circuit are connected successively, described warning output is connected with central processing unit, described relay drives with described warning output and is connected, and in warning circuit, warning input end R51 is connected in the base stage of triode Q1; Collector respectively resistance in series R68 and R52 is connected in the base stage and collector of another triode Q2, the emitter of Q1 be connected in analog, the emitter of Q2 is connected with thermistor PTC1, the other end of PTC1 is connected on terminal J1; The second tunnel warning output is consistent with first via principle, warning input end R54 is connected with the base stage of triode Q3, collector respectively resistance in series R69 and R55 is connected in the base stage and collector of another triode Q4, the emitter of Q3 be connected in analog, the emitter of Q4 is connected with thermistor PTC2, and the other end of PTC2 is connected on terminal J2; While triode Q2, the emitter of Q4 is connected with signal ground.
2. the differential pressure transmitter of reporting to the police and exporting according to the two-way described in claim 1, it is characterized in that, in differential pressure pick-up, the 4 pin VDD that VCC is connected to single-chip microcomputer above input as power supply, sensor resistance R1, is connected with the tripod INA-of single-chip microcomputer, and R2 is connected with the 5th pin INB+ of single-chip microcomputer, R3 is connected with the first pin OUTA of single-chip microcomputer, and R4 is connected with the tenth pin INC+ of single-chip microcomputer; The crus secunda of single-chip microcomputer, tripod, the 4th pin is also connected to the ground simultaneously; Output terminal 14 pin OUTD, ten tripod IND-are connected to the two ends of resistance; The 6th pin INB-is connected with resistance one end with the 7th pin OUTB short circuit, octal OUTC, and the 9th pin INC-, the 12 pin IND+ is connected with resistance respectively, and the other end of resistance is connected to the ground; The 11 pin VSS is connected to the ground.
3. the differential pressure transmitter of reporting to the police and exporting according to the two-way described in claim 1, is characterized in that, during relay drives, resistance R is connected with light emitting diode, LED lighting, and through optocoupler, effect passes the signal along to right-hand member; VCC is connected with resistance, and resistance is connected with diode, diode respectively with the base stage of triode Q be connected in analog, the collector of triode is connected with relay, relay is connected with power supply VCC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320663742.3U CN203534759U (en) | 2013-10-25 | 2013-10-25 | Differential pressure transformer having two paths of alarm outputs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320663742.3U CN203534759U (en) | 2013-10-25 | 2013-10-25 | Differential pressure transformer having two paths of alarm outputs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203534759U true CN203534759U (en) | 2014-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320663742.3U Expired - Fee Related CN203534759U (en) | 2013-10-25 | 2013-10-25 | Differential pressure transformer having two paths of alarm outputs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203534759U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109283871A (en) * | 2018-09-28 | 2019-01-29 | 承德万达高新仪表有限公司 | A kind of intelligent transmitter of two-wire system with dry contact output warning function |
-
2013
- 2013-10-25 CN CN201320663742.3U patent/CN203534759U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109283871A (en) * | 2018-09-28 | 2019-01-29 | 承德万达高新仪表有限公司 | A kind of intelligent transmitter of two-wire system with dry contact output warning function |
| CN109283871B (en) * | 2018-09-28 | 2023-12-08 | 承德万达高新仪表有限公司 | Two-wire intelligent transmitter with dry contact output alarm function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20181025 |
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| CF01 | Termination of patent right due to non-payment of annual fee |