CN102427297A - Circuit and device of isolation sensor - Google Patents
Circuit and device of isolation sensor Download PDFInfo
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- CN102427297A CN102427297A CN2011104230812A CN201110423081A CN102427297A CN 102427297 A CN102427297 A CN 102427297A CN 2011104230812 A CN2011104230812 A CN 2011104230812A CN 201110423081 A CN201110423081 A CN 201110423081A CN 102427297 A CN102427297 A CN 102427297A
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- isolating transformer
- timer
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Abstract
The invention discloses a circuit of an isolation sensor. The circuit consists of a transformer driver, an isolation transformer, an oscillator, a sensor and a diode, wherein the Vcc (virtual channel connection), FS (fin stabilized), SD (standard deviation) pins of the transformer driver are connected with a power source; pins D1 and D2 are connected with a primary winding of the isolation transformer; one end of the sensor is connected with the power source, and the other end of the sensor is grounded; an output end is arranged between the sensor and the power source, and a secondary winding of the isolation transformer is connected with the oscillator; the two ends of the secondary winding are respectively provided with a diode E1 and a diode E2, the isolation transformer is used for isolating power supply for the sensor, and simultaneously, the isolation transformer transfers current change so as to realize the isolation acquisition of the sensor; and the sensor is powered by a main engine, and simultaneously is isolated from the main engine. According to the invention, the problems that an existing data acquisition system is not provided with an isolation function between the sensor and the data acquisition system, and is not provided with an isolated power source can be solved.
Description
Technical field
The present invention relates to electronic circuit field, particularly a kind of circuit of isolation sensor and device.
Background technology
The electromotive force feedback point work that transducer must differ greatly public (equipotential) ground connection with data acquisition system sometimes.And on the present prior art; Between transducer and its data acquisition system, isolation features is not provided, and data acquisition system do not provide the power supply of isolation for transducer yet, in operate as normal, bring very big inconvenience; In traditional circuit; Electronic component is various, complex structure, and cost of manufacture height and Production Time are long.
Summary of the invention
In view of this, be necessary to provide a kind of and between data acquisition system and transducer, isolation features be provided, and have insulating power supply, and simple in structure, the circuit and the device of the isolation sensor that cost of manufacture reduction and make efficiency improve.
The present invention realizes like this; A kind of circuit of isolation sensor comprises transformer driver, isolating transformer, oscillator, transducer and diode composition, and the Vcc of said transformer driver, FS, SD pin are connected with power supply; D1, D2 pin are connected with the elementary winding of said isolating transformer; Said transducer one end is connected with power supply, and other end ground connection is provided with output between said transducer and the power supply; The secondary winding of said isolating transformer is connected with said oscillator, and said secondary winding two ends are respectively equipped with E1 diode and E2 diode.
Further; Said oscillator comprises timer, linear transducer, thermo-compensator, sample resistance and electric capacity; 3 pins of said timer are connected with sample resistance; The other end of said sample resistance is connected with 4,8 pins of said timer and is connected with the secondary winding of described isolating transformer through the E1 diode, and 7 pins of said timer are connected with said thermo-compensator with said linear transducer respectively, and the other end of said linear transducer is connected with 4,8 pins of said timer; The other end of said thermo-compensator is connected with 5,6 pins of said timer; And be connected with electric capacity, the other end of said electric capacity is connected and ground connection with the secondary winding of said isolating transformer through the E2 diode, and 5 pins of said timer are connected with electric capacity; The other end of said electric capacity is connected and ground connection with the secondary winding of said isolating transformer through the E2 diode, and 1 pin of said timer is connected and ground connection with the secondary winding of said isolating transformer through the E2 diode.
Further, the number of turn ratio of the elementary winding of said isolating transformer and secondary winding is 1:1.
Further, the secondary winding of said isolating transformer is no tap secondary winding.
Further, in two diodes at said secondary winding two ends, the anode of E1 diode connects the secondary winding of said isolating transformer, the negative electrode connection oscillator, and the negative electrode of E2 diode connects the secondary winding of said isolating transformer, the anode connection oscillator.
The present invention also provides a kind of device of isolation sensor; It is provided with the isolation sensor circuit, and said isolation sensor circuit comprises transformer driver, isolating transformer, oscillator, transducer and diode composition, and the Vcc of said transformer driver, FS, SD pin are connected with power supply; D1, D2 pin are connected with the elementary winding of said isolating transformer; GND1, GND2 pin connect power supply through transducer, and GND1, GND2 pin ground connection, are provided with output between said transducer and the power supply; Said isolating transformer secondary winding be connected with said oscillator, said secondary winding two ends are respectively equipped with E1 diode and E2 diode.
Further; Said oscillator comprises timer, linear transducer, thermo-compensator, sample resistance and electric capacity; 3 pins of said timer are connected with sample resistance; The other end of said sample resistance is connected with 4,8 pins of said timer and is connected with the secondary winding of described isolating transformer through the E1 diode, and 7 pins of said timer are connected with said thermo-compensator with said linear transducer respectively, and the other end of said linear transducer is connected with 4,8 pins of said timer; The other end of said thermo-compensator is connected with 5,6 pins of said timer; And be connected with electric capacity, the other end of said electric capacity is connected and ground connection with the secondary winding of said isolating transformer through the E2 diode, and 5 pins of said timer are connected with electric capacity; The other end of said electric capacity is connected and ground connection with the secondary winding of said isolating transformer through the E2 diode, and 1 pin of said timer is connected and ground connection with the secondary winding of said isolating transformer through the E2 diode.
Further, the number of turn ratio of the elementary winding of said isolating transformer and secondary winding is 1:1.
Further, the secondary winding of said isolating transformer is no tap secondary winding.
Further, in two diodes at said secondary winding two ends, the anode of E1 diode connects the secondary winding of said isolating transformer, the negative electrode connection oscillator, and the negative electrode of E2 diode connects the secondary winding of said isolating transformer, the anode connection oscillator.
The circuit of isolation sensor provided by the invention and the advantage of device are: come to isolate power supply to transducer through isolating transformer, the transmission that through isolating transformer electric current is changed simultaneously realizes transducer is isolated collection.Be that transducer is supplied power by main frame, while and main frame are isolated.Thereby solve existing data acquisition system and between transducer and data acquisition system, isolation features is not provided; And the problem of the power supply of isolation is not provided, and simultaneously, circuit structure is simple; Electronic device is few, strong condition is provided for cost of manufacture and Production Time.
Description of drawings
Fig. 1 is the circuit of isolation sensor of the present invention and the electrical block diagram of device.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
See also Fig. 1, Fig. 1 is the circuit of isolation sensor of the present invention and circuit 100 structural representations of device.
A kind of circuit 100 of isolation sensor; Comprise transformer driver 20, isolating transformer 30, oscillator 10, transducer 50 and diode composition; The Vcc of said transformer driver 20, FS, SD pin are connected with power supply 60, and D1, D2 pin are connected with the elementary winding 31 of said isolating transformer 30, and said transducer 50 1 ends are connected with power supply; Other end ground connection; Be provided with output 70 between said transducer 50 and the power supply 60, the secondary winding 32 of said isolating transformer 30 is connected with said oscillator 10, and said secondary winding 32 two ends are respectively equipped with diode 41 and diode 42.
Said oscillator 10 comprises timer 11, linear transducer 13, thermo-compensator 14, sample resistance 12 and electric capacity 15,16; Said timer can adopt general vibration IC; 3 pins of said timer 11 are connected with sample resistance 12; The other end of said sample resistance 12 is connected with 4,8 pins of said timer 11 and is connected 32 through diode 41 with the secondary winding of described isolating transformer 30; 7 pins of said timer 11 are connected with said thermo-compensator 14 with said linear transducer 13 respectively, and the other end of said linear transducer 13 is connected with 4,8 pins of said timer 11, and the other end of said thermo-compensator 14 is connected with 5,6 pins of said timer 11; And be connected with electric capacity 15; The other end of said electric capacity 15 is connected and ground connection with the secondary winding 32 of said isolating transformer 30 through diode 42, and 5 pins of said timer 11 are connected with electric capacity 16, and the other end of said electric capacity 16 is connected and ground connection with the secondary winding 32 of said isolating transformer 30 through diode 42; 1 pin of said timer 11 is connected and ground connection with the secondary winding 32 of said isolating transformer 30 through diode 42; In two diodes at said secondary winding 32 two ends, the anode of diode 41 connects the secondary winding 32 of said isolating transformer 30, negative electrode connection oscillator 10; The negative electrode of diode 42 connects the secondary winding 32 of said isolating transformer 30, anode connection oscillator 10.
The elementary winding 31 of said isolating transformer 30 is 1:1 with the number of turn ratio of secondary winding 32, and the secondary winding 32 of isolating transformer 30 is no tap secondary winding.
Operation principle of the present invention is, realizes the isolation power supply to linear transducer 13 through isolating transformer 30, and the transmission that changes through 30 pairs of electric currents of isolating transformer simultaneously realizes linear transducer 13 isolated and gathers.Its process is specially: power supply 60 is connected transformer driver 20, thereby drives isolating transformer 30 work, for linear transducer 13 provides the power supply of isolating; Temperature compensated resistance 14 ground connection of the negative pole of linear transducer 13; And get into timer 11,3 pins of timer 11 get into power supplys through sample resistance 12, output 70 according to isolating transformer 30 change in current through calculating the value of transducer 50; Transformer driver 20 is power transformer drivers of the complementary square wave output of a fixed frequency; Export a side of return data acquisition system over the ground at the transducer 50 of corresponding transformer driver 20, sample resistance 12 detects the variation of linear transducer 13 through the variation of inspection output 70 signal frequencies, monitors the corresponding factor that influences linear transducer 13 (like temperature through calculating again; Pressure, humidity etc.).
In sum, the circuit of isolation sensor provided by the invention and device come to isolate power supply to transducer through isolating transformer, and the transmission that through isolating transformer electric current is changed simultaneously realizes that isolation is gathered to transducer.Be that transducer is supplied power by main frame, while and main frame are isolated.Thereby solve existing data acquisition system and between transducer and data acquisition system, isolation features is not provided; And the problem of the power supply of isolation is not provided, and simultaneously, circuit structure is simple; Electronic device is few, strong condition is provided for cost of manufacture and Production Time.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. the circuit of an isolation sensor; It is characterized in that comprise transformer driver, isolating transformer, oscillator, transducer and diode composition, the Vcc of said transformer driver, FS, SD pin are connected with power supply; D1, D2 pin are connected with the elementary winding of said isolating transformer; Said transducer one end is connected with power supply, and other end ground connection is provided with output between said transducer and the power supply; The secondary winding of said isolating transformer is connected with said oscillator, and said secondary winding two ends are respectively equipped with E1 diode and E2 diode.
2. the circuit of isolation sensor according to claim 1; It is characterized in that; Said oscillator comprises timer, linear transducer, thermo-compensator, sample resistance and electric capacity; 3 pins of said timer are connected with sample resistance; The other end of said sample resistance is connected with 4,8 pins of said timer and is connected with the secondary winding of described isolating transformer through the E1 diode, and 7 pins of said timer are connected with said thermo-compensator with said linear transducer respectively, and the other end of said linear transducer is connected with 4,8 pins of said timer; The other end of said thermo-compensator is connected with 5,6 pins of said timer; And be connected with electric capacity, the other end of said electric capacity is connected and ground connection with the secondary winding of said isolating transformer through the E2 diode, and 5 pins of said timer are connected with electric capacity; The other end of said electric capacity is connected and ground connection with the secondary winding of said isolating transformer through the E2 diode, and 1 pin of said timer is connected and ground connection with the secondary winding of said isolating transformer through the E2 diode.
3. according to the circuit of each described isolation sensor of claim 1-2, it is characterized in that the elementary winding of said isolating transformer and the number of turn ratio of secondary winding are 1:1.
4. according to the circuit of each described isolation sensor of claim 1-3, it is characterized in that the secondary winding of said isolating transformer is no tap secondary winding.
5. according to the circuit of each described isolation sensor of claim 1-2; It is characterized in that; In two diodes at said secondary winding two ends, the anode of E1 diode connects the secondary winding of said isolating transformer, the negative electrode connection oscillator; The negative electrode of E2 diode connects the secondary winding of said isolating transformer, the anode connection oscillator.
6. the device of an isolation sensor, it is provided with the circuit like each described isolation sensor of claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104230812A CN102427297A (en) | 2011-12-16 | 2011-12-16 | Circuit and device of isolation sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104230812A CN102427297A (en) | 2011-12-16 | 2011-12-16 | Circuit and device of isolation sensor |
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| Publication Number | Publication Date |
|---|---|
| CN102427297A true CN102427297A (en) | 2012-04-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104230812A Pending CN102427297A (en) | 2011-12-16 | 2011-12-16 | Circuit and device of isolation sensor |
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| CN (1) | CN102427297A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104162181B (en) * | 2014-08-05 | 2017-02-08 | 衢州昀睿工业设计有限公司 | Circuit for refrigerator deodorizing preserving device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1198834A (en) * | 1997-09-24 | 1999-04-09 | Toshiba Corp | Semiconductor device for switching power supply |
| CN101887076A (en) * | 2010-06-22 | 2010-11-17 | 深圳和而泰智能控制股份有限公司 | Circuit and device of isolation sensor |
| CN202424524U (en) * | 2011-12-16 | 2012-09-05 | 铜陵浩岩节能科技有限公司 | Circuit and device of isolated sensor |
-
2011
- 2011-12-16 CN CN2011104230812A patent/CN102427297A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1198834A (en) * | 1997-09-24 | 1999-04-09 | Toshiba Corp | Semiconductor device for switching power supply |
| CN101887076A (en) * | 2010-06-22 | 2010-11-17 | 深圳和而泰智能控制股份有限公司 | Circuit and device of isolation sensor |
| CN202424524U (en) * | 2011-12-16 | 2012-09-05 | 铜陵浩岩节能科技有限公司 | Circuit and device of isolated sensor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104162181B (en) * | 2014-08-05 | 2017-02-08 | 衢州昀睿工业设计有限公司 | Circuit for refrigerator deodorizing preserving device |
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Application publication date: 20120425 |