CN105444787A - Direct current transmitter with high reliability - Google Patents
Direct current transmitter with high reliability Download PDFInfo
- Publication number
- CN105444787A CN105444787A CN201510800086.0A CN201510800086A CN105444787A CN 105444787 A CN105444787 A CN 105444787A CN 201510800086 A CN201510800086 A CN 201510800086A CN 105444787 A CN105444787 A CN 105444787A
- Authority
- CN
- China
- Prior art keywords
- direct current
- protection circuit
- output terminal
- high reliability
- input end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a direct current transmitter with high reliability. The transmitter comprises a power supply module, a collection module and a communication module. The power supply module comprises an input terminal connected to a direct current 24V output terminal. The input terminal is provided with a unilateral diode used for reverse connection protection respectively. The unilateral diode is connected to an EMC protection circuit. The EMC protection circuit is connected to a DC/DC isolation circuit. The DC/DC isolation circuit provides a direct current 5V power supply for the direct current transmitter. The collection module comprises a voltage collection loop and a current collection loop. An output terminal of a voltage signal is connected in series with a resistor R1 and then is connected to an input terminal of an ADE7912 chip through a voltage limiting protection circuit. An input terminal of the voltage limiting protection circuit is connected in parallel with a resistor R2. An output terminal of a current signal is connected in parallel with a resistor R3 and is connected to the input terminal of the ADE7912 chip through the voltage limiting protection circuit. An output terminal of the ADE7912 chip is connected to a CPU. The communication module comprises an IS03082 isolation chip connected to the CPU. An output terminal of the IS03082 isolation chip is connected to a safety protection circuit.
Description
Technical field
The present invention relates to a kind of high reliability direct current transmitter.
Background technology
Distribution power automation terminal is a control system that function is various, operation is complicated, and the telemetry-acquisition of single opinion just can reach 10 circuits, and each circuit comprises the voltage of 3 passages and the electric current of 3 passages, also needs the DC quantity signal of collection 2 passages simultaneously.The direct current transmitter of traditional design this direct current signal is then sent into AD (simulating signal is converted to digital signal) by simple signal acquisition circuit carry out collection computing, and system CPU timing can read AD acquisition related data.
Although the direct current transmitter structure of traditional design is simple, cost is low, but it does not adopt effective quarantine measures, cause reliability in actual applications very low, often damage under comparatively rugged environment, while improving maintenance cost, also reduce the global reliability of product.
Summary of the invention
For the problems referred to above, the invention provides a kind of high reliability direct current transmitter, reasonable in design, ensure that the high reliability of direct current transmitter.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions:
A kind of high reliability direct current transmitter, comprises power module, acquisition module and communication module, it is characterized in that:
Described power module comprises the input end be connected with direct current 24V output terminal, described input end is respectively arranged with the unilateral diode for reverse connecting protection, described unilateral diode is connected with EMC protection circuit, described EMC protection circuit is connected with DC/DC buffer circuit, and described DC/DC buffer circuit provides the power supply of direct current 5V for direct current transmitter;
Described acquisition module comprises voltage acquisition circuit and current acquisition circuit, and wherein, after the output terminal resistance in series R1 of voltage signal, be connected by the input end of pressure limited protection circuit with ADE7912 chip, the input end of described pressure limited protection circuit is also parallel with resistance R2; The output terminal of current signal is parallel with resistance R3, is connected by the input end of pressure limited protection circuit with ADE7912 chip; The output terminal of described ADE7912 chip is connected with CPU;
Described communication module comprises the IS03082 isolating chip be connected with CPU, and the output terminal of described IS03082 isolating chip is connected with safety protection circuit.
Preferably, the input end of described EMC protection circuit and output terminal are in series with common mode inductance L1 and common mode inductance L2 respectively, be parallel with TVS pipe TVS1, polar capacitor CP1, nonpolar electric capacity CP2 between described common mode inductance L1 and common mode inductance L2, and the input end of EMC protection circuit is also parallel with voltage dependent resistor (VDR) RV1.
Preferably, the threshold value of RV1 is 56V, L1=50 microhenry, the specified reverse shutoff voltage of TVS1 be 50V, CP1 capacity and withstand voltage be respectively 220 microfarads, 50V, CP2 capacity and be withstand voltagely respectively 1 microfarad, 50V, L1 are 3 ~ 10 microhenrys.
Preferably, the resistance of R1, R2, R3 and rated power are respectively: 47K Ω/2W, 470 Ω/0.5W, 1 Ω/2W.
The invention has the beneficial effects as follows: adopt independently reliability design respectively by the power module to direct current transmitter, acquisition module and communication module, thus achieve each several part circuit mutually between isolation and isolation with direct current transmitter external circuit, in addition, on parts selection, also emphasis considers high reliability, taken into account by the design proposal of high reliability and the device of high reliability, ensure that the high reliability of direct current transmitter entirety.Structure is simple, easy to use.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of high reliability direct current transmitter of the present invention;
Fig. 2 is the electrical structure diagram of EMC protection circuit of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, technical solution of the present invention is described in further detail, can better understand the present invention to make those skilled in the art and can be implemented, but illustrated embodiment is not as a limitation of the invention.
A kind of high reliability direct current transmitter, comprises power module, acquisition module and communication module, as shown in Figure 1:
Described power module comprises the input end be connected with direct current 24V output terminal; described input end is respectively arranged with the unilateral diode for reverse connecting protection; the unilateral diode of relatively high power of namely connecting respectively at DC24V+ and DC24-input end, thus the available protecting follow-up loop security when power supply positive and negative reversal connection.Described unilateral diode is connected with EMC protection circuit, described EMC protection circuit is connected with DC/DC buffer circuit, and described DC/DC buffer circuit provides the power supply of direct current 5V for direct current transmitter, wherein, 9 ~ 36V wide region is preferably adopted to input, the DC/DC isolation module that 5V exports.
Preferably, as shown in Figure 2, the input end of described EMC protection circuit and output terminal are in series with common mode inductance L1 and common mode inductance L2 respectively, be parallel with TVS pipe TVS1, polar capacitor CP1, nonpolar electric capacity CP2 between described common mode inductance L1 and common mode inductance L2, and the input end of EMC protection circuit is also parallel with voltage dependent resistor (VDR) RV1.Wherein, in the best of breed of device, parameters is as follows:
The threshold value of RV1 is 56V, L1=50 microhenry, the specified reverse shutoff voltage of TVS1 be 50V, CP1 capacity and withstand voltage be respectively 220 microfarads, 50V, CP2 capacity and be withstand voltagely respectively 1 microfarad, 50V, L1 are 3 ~ 10 microhenrys.
Described acquisition module comprises voltage acquisition circuit and current acquisition circuit; wherein; voltage acquisition circuit is two electric resistance partial pressure schemes: after the output terminal resistance in series R1 of voltage signal; be connected by the input end of pressure limited protection circuit with ADE7912 chip, the input end of described pressure limited protection circuit is also parallel with resistance R2.Current acquisition circuit is single electric resistance partial pressure scheme: the output terminal of current signal is parallel with resistance R3, is connected by the input end of pressure limited protection circuit with ADE7912 chip; The output terminal of described ADE7912 chip is connected with CPU.
Pressure limited protection circuit can adopt the pressure limiting of TS4148 voltage stabilizing diode, and resistance and the rated power of R1, R2, R3 are respectively: 47K Ω/2W, 470 Ω/0.5W, 1 Ω/2W.
Described communication module comprises the IS03082 isolating chip be connected with CPU; the output terminal of described IS03082 isolating chip is connected with safety protection circuit; described safety protection circuit adopts TVS pipe and standard capacitance TVS array combination design proposal; wherein; TVS pipe is P6SMBJ6.8CA, standard capacitance TVS array is PSM712.
Independently reliability design is adopted respectively by the power module to direct current transmitter, acquisition module and communication module, thus achieve each several part circuit mutually between isolation and isolation with direct current transmitter external circuit, in addition, on parts selection, also emphasis considers high reliability, taken into account by the design proposal of high reliability and the device of high reliability, ensure that the high reliability of direct current transmitter entirety.Structure is simple, easy to use.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in the technical field that other are relevant, be all in like manner included in scope of patent protection of the present invention.
Claims (6)
1. a high reliability direct current transmitter, comprises power module, acquisition module and communication module, it is characterized in that:
Described power module comprises the input end be connected with direct current 24V output terminal, described input end is respectively arranged with the unilateral diode for reverse connecting protection, described unilateral diode is connected with EMC protection circuit, described EMC protection circuit is connected with DC/DC buffer circuit, and described DC/DC buffer circuit provides the power supply of direct current 5V for direct current transmitter;
Described acquisition module comprises voltage acquisition circuit and current acquisition circuit, and wherein, after the output terminal resistance in series R1 of voltage signal, be connected by the input end of pressure limited protection circuit with ADE7912 chip, the input end of described pressure limited protection circuit is also parallel with resistance R2; The output terminal of current signal is parallel with resistance R3, is connected by the input end of pressure limited protection circuit with ADE7912 chip; The output terminal of described ADE7912 chip is connected with CPU;
Described communication module comprises the IS03082 isolating chip be connected with CPU, and the output terminal of described IS03082 isolating chip is connected with safety protection circuit.
2. a kind of high reliability direct current transmitter according to claim 1, it is characterized in that, the input end of described EMC protection circuit and output terminal are in series with common mode inductance L1 and common mode inductance L2 respectively, be parallel with TVS pipe TVS1, polar capacitor CP1, nonpolar electric capacity CP2 between described common mode inductance L1 and common mode inductance L2, and the input end of EMC protection circuit is also parallel with voltage dependent resistor (VDR) RV1.
3. a kind of high reliability direct current transmitter according to claim 2, it is characterized in that, the threshold value of RV1 is 56V, L1=50 microhenry, the specified reverse shutoff voltage of TVS1 is 50V, the capacity of CP1 and withstand voltage be respectively 220 microfarads, 50V, CP2 capacity and be withstand voltagely respectively 1 microfarad, 50V, L1 are 3 ~ 10 microhenrys.
4. a kind of high reliability direct current transmitter according to claim 3, is characterized in that, resistance and the rated power of R1, R2, R3 are respectively: 47K Ω/2W, 470 Ω/0.5W, 1 Ω/2W.
5. a kind of high reliability direct current transmitter according to claim 4, is characterized in that, described safety protection circuit adopts the array combination of P6SMBJ6.8CA and PSM712.
6. a kind of high reliability direct current transmitter according to claim 4, is characterized in that, described pressure limited protection circuit adopts the pressure limiting of TS4148 voltage stabilizing diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510800086.0A CN105444787B (en) | 2015-11-19 | 2015-11-19 | A kind of high reliability direct current transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510800086.0A CN105444787B (en) | 2015-11-19 | 2015-11-19 | A kind of high reliability direct current transmitter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105444787A true CN105444787A (en) | 2016-03-30 |
| CN105444787B CN105444787B (en) | 2017-07-11 |
Family
ID=55555255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510800086.0A Active CN105444787B (en) | 2015-11-19 | 2015-11-19 | A kind of high reliability direct current transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105444787B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160461A (en) * | 2016-04-01 | 2016-11-23 | 北京安控科技股份有限公司 | A kind of functional safety power module |
| CN106451772A (en) * | 2016-10-08 | 2017-02-22 | 广州供电局有限公司 | Direct voltage acquisition apparatus |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030052705A1 (en) * | 2001-09-14 | 2003-03-20 | Ralf Koernle | Circuit configuration for the voltage supply of a two-wire sensor |
| CN201382786Y (en) * | 2008-10-15 | 2010-01-13 | 合肥精大仪表股份有限公司 | Interior power supply circuit of site signal transducer |
| CN102507072A (en) * | 2011-11-23 | 2012-06-20 | 西安传思电子科技有限公司 | Intelligent spring tube pressure transmitter |
| CN102590589A (en) * | 2012-02-23 | 2012-07-18 | 河海大学 | 4-20mA current transmitter circuit |
| CN203011981U (en) * | 2013-01-14 | 2013-06-19 | 湖南大学 | DC side voltage isolation detection system applied to high voltage H-bridge cascading SVG |
| CN203204483U (en) * | 2013-05-13 | 2013-09-18 | 哈尔滨国力电气有限公司 | Quick-response direct-current transmitter |
| CN203289369U (en) * | 2013-06-26 | 2013-11-13 | 湖南工程学院 | Digitalized adjustment circuit for direct-current power supply |
| DE102012111285B3 (en) * | 2012-11-22 | 2014-02-13 | Turck Holding Gmbh | Signal isolator for isolating measuring signals, has auxiliary energy feeder connected in series with output and clamps of direct current to direct current converter, and measuring circuit measuring voltage lying at clamps |
| CN103809642A (en) * | 2012-11-12 | 2014-05-21 | 横河电机株式会社 | Current output circuit and two-wire transmitter |
| US20150115942A1 (en) * | 2013-10-25 | 2015-04-30 | Seiko Instruments Inc. | Magnetic sensor circuit |
-
2015
- 2015-11-19 CN CN201510800086.0A patent/CN105444787B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030052705A1 (en) * | 2001-09-14 | 2003-03-20 | Ralf Koernle | Circuit configuration for the voltage supply of a two-wire sensor |
| CN201382786Y (en) * | 2008-10-15 | 2010-01-13 | 合肥精大仪表股份有限公司 | Interior power supply circuit of site signal transducer |
| CN102507072A (en) * | 2011-11-23 | 2012-06-20 | 西安传思电子科技有限公司 | Intelligent spring tube pressure transmitter |
| CN102590589A (en) * | 2012-02-23 | 2012-07-18 | 河海大学 | 4-20mA current transmitter circuit |
| CN103809642A (en) * | 2012-11-12 | 2014-05-21 | 横河电机株式会社 | Current output circuit and two-wire transmitter |
| DE102012111285B3 (en) * | 2012-11-22 | 2014-02-13 | Turck Holding Gmbh | Signal isolator for isolating measuring signals, has auxiliary energy feeder connected in series with output and clamps of direct current to direct current converter, and measuring circuit measuring voltage lying at clamps |
| CN203011981U (en) * | 2013-01-14 | 2013-06-19 | 湖南大学 | DC side voltage isolation detection system applied to high voltage H-bridge cascading SVG |
| CN203204483U (en) * | 2013-05-13 | 2013-09-18 | 哈尔滨国力电气有限公司 | Quick-response direct-current transmitter |
| CN203289369U (en) * | 2013-06-26 | 2013-11-13 | 湖南工程学院 | Digitalized adjustment circuit for direct-current power supply |
| US20150115942A1 (en) * | 2013-10-25 | 2015-04-30 | Seiko Instruments Inc. | Magnetic sensor circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160461A (en) * | 2016-04-01 | 2016-11-23 | 北京安控科技股份有限公司 | A kind of functional safety power module |
| CN106451772A (en) * | 2016-10-08 | 2017-02-22 | 广州供电局有限公司 | Direct voltage acquisition apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105444787B (en) | 2017-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203688646U (en) | Zero crossing detection circuit | |
| CN105633905A (en) | Overvoltage and under-voltage protection circuit | |
| CN105444787A (en) | Direct current transmitter with high reliability | |
| CN102331522B (en) | Isolated voltage acquisition circuit for light transmission equipment | |
| CN204405726U (en) | Electric machine phase current over-current detection and over current fault output circuit | |
| CN104077260B (en) | A kind of concentrator M BUS host communication interface arrangements | |
| CN201717794U (en) | Capacitor voltage reducing circuit using impedance input filter | |
| CN105391320A (en) | Multi-phase power circuit | |
| CN104483579A (en) | Switching value acquisition circuit | |
| CN201788214U (en) | Intelligent single-phase cost control electricity meter with low power consumption | |
| CN204302420U (en) | A kind of switch quantity acquisition circuit | |
| CN203535635U (en) | RS232 communication circuit | |
| CN103219694B (en) | Current foldback circuit | |
| CN203838509U (en) | Micro-power consumption M-bus slave computer end circuit for intelligent instrument communication | |
| CN203660518U (en) | Overcurrent protection circuit of insulated gate bipolar transistor | |
| CN203337807U (en) | Circuit capable of inhibiting overvoltage locking protection for current-constant power supply during startup | |
| CN203761362U (en) | Bidirectional interface circuit | |
| CN203554315U (en) | Miniature PLC power supply | |
| CN203589789U (en) | Battery power supply system | |
| CN202135070U (en) | Dual-voltage capacitance-resistance voltage-reduction energy saving circuit | |
| CN203520075U (en) | Control module in special changing acquisition terminal | |
| CN203933592U (en) | Low-power-consumption photoelectric isolation input acquisition circuit | |
| CN204832823U (en) | Voltage isolated safety barrier | |
| CN203812009U (en) | Instrument communication serial port multiplex control device | |
| CN203466742U (en) | LED driving power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |