CN105245219A - Active type analog signal isolation converter - Google Patents
Active type analog signal isolation converter Download PDFInfo
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- CN105245219A CN105245219A CN201510578990.1A CN201510578990A CN105245219A CN 105245219 A CN105245219 A CN 105245219A CN 201510578990 A CN201510578990 A CN 201510578990A CN 105245219 A CN105245219 A CN 105245219A
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- isolation
- analog signal
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Abstract
The invention discloses an active type analog signal isolation converter. The active type analog signal isolation converter is characterized in that the active type analog signal isolation converter comprises an input circuit; the input circuit is connected with a modulation circuit; the input circuit is connected with an isolation circuit; the isolation circuit is connected with a demodulation circuit; the demodulation circuit is connected with an adjustment circuit; the adjustment circuit is provided with a zero point adjustment circuit and a full scale adjustment circuit; the adjustment circuit is connected with an output circuit; the adjustment circuit is connected with a microprocessor (MCU) with an analog-to-digital converter; the microprocessor (MCU) is connected with a high-speed isolation circuit and a communication circuit; the high-speed isolation circuit is connected with the output circuit; a communication circuit is connected with an upper computer; an auxiliary power source is connected with an isolation power source; the auxiliary power source supplies power for the front stage of the isolation circuit; and the isolation power source supplies power for the back stage of the isolation circuit. With the active type analog signal isolation converter of the invention adopted, the anti-interference performance and carrying capacity of a product can be greatly improved, and the reliability of signal data can be ensured.
Description
Technical field
The present invention relates to Industrial Simulation signals collecting isolation switch technology, what be specifically related to is a kind of active type analog signal isolating transducer.
Background technology
Along with the progress of science and technology, industrial data are all represented by electronic instrument widely, as fields such as oil, chemical industry, environmental protection, mining and electric power, the physical quantity such as voltage, electric current, frequency, thermal resistance, displacement, rotating speed, PWM needs Real-time Collection, grasp Production development is understood for engineering personnel, because various industrial electric noise jamming under the industrial environment of complexity, the small-signal that transducer exports often has superposed various interference signal when being sent to data collection station, after arriving data collection station, available accuracy and the linearity are greatly affected.This just needs corresponding isolating converter to ensure the stable sampling of signal, existing product mainly contains passive I/I, V/I, I/V isolating converter, the internal circuit working power of passive conversion is stolen inside signal, band carry and export driving force limited, often can only be applied in some more underloaded industrial equipments.For this reason, there is the signal converter of externally fed, the signal converter of externally fed is no longer stolen inside signal, signal and each circuit part of having oneself by oneself of power supply, the drive source of output signal no longer obtains inside signal, but formed the drive source of output signal by internal circuit by externally fed power supply, connect with externally fed power supply after collector electrode pull-up resistance of such as current drive-type triode, load capacity is strong, but the active transducer of this kind of externally fed still has individual shortcoming clearly, it is exactly their signal input, the ground that power supply and signal export is all altogether on a point, at severe industrial environment, various electromagnetic interference, vibration and moist meeting bring very serious electric effect to product, for this active type signal converter, signal, power supply, will crosstalk mutually between output external equipment, cause the instability of signal, and only there is a kind of mode changeover signal, this still awaits technological innovation and solves.
Summary of the invention
In order to solve the problem, the invention provides a kind of active type analog signal isolating transducer.
Technical scheme provided by the invention is: a kind of active type analog signal isolating transducer, it is characterized in that comprising input circuit, input circuit is connected with modulation circuit, input circuit is connected with buffer circuit, buffer circuit is connected with demodulator circuit, be connected with regulating circuit, regulating circuit is provided with zero adjustment circuit and full scale regulating circuit, regulating circuit is connected with output circuit, regulating circuit is connected with the Micro-processor MCV with analog to digital converter, Micro-processor MCV is connected with high-speed isolated circuit and communicating circuit, high-speed isolated circuit is connected with output circuit, communicating circuit is connected with host computer, accessory power supply is connected with insulating power supply, accessory power supply is that buffer circuit prime is powered, insulating power supply is that buffer circuit rear class is powered.
Further, each parts epoxy resin encapsulated is in a shell.
Transducer of the present invention is powered by insulating power supply, signal input, signal export and power supply is isolated mutually, greatly improve interference free performance and the load capacity of product, ensure that the reliability of signal data, both analog signal isolating corresponding analog signal can be converted to, also analog signal isolating corresponding digital signal can be converted to.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention theory diagram.
Fig. 2 is embodiment of the present invention magnetoelectricity buffer circuit circuit diagram.
Fig. 3 is embodiment of the present invention photoelectric isolating circuit circuit diagram.
Fig. 4 is embodiment of the present invention input circuit circuit diagram.
Fig. 5 is embodiment of the present invention analog signal output circuit figure.
Fig. 6 is embodiment of the present invention digital signal output circuit circuit diagram.
Fig. 7 to Figure 22 is encapsulating structure schematic diagram of the present invention.
Embodiment
The embodiment of the present invention as shown in Figures 1 to 6, this active type analog signal isolating transducer, it is characterized in that comprising input circuit, input circuit is connected with modulation circuit, input circuit is connected with buffer circuit, buffer circuit is connected with demodulator circuit, be connected with regulating circuit, regulating circuit is provided with zero adjustment circuit and full scale regulating circuit, regulating circuit is connected with output circuit, regulating circuit is connected with the Micro-processor MCV with analog to digital converter, Micro-processor MCV is connected with high-speed isolated circuit and communicating circuit, high-speed isolated circuit is connected with output circuit, communicating circuit is connected with host computer, accessory power supply is connected with insulating power supply, accessory power supply is that buffer circuit prime is powered, insulating power supply is that buffer circuit rear class is powered.
Input circuit as shown in Figure 4, the less operational amplifier of imbalance at zero point is adopted to carry out amplifying and following, and input signal is transmitted, pass through magnetoelectricity buffer circuit again as Fig. 2 self-oscillation, or photoelectric isolating circuit is shown in Fig. 3, carry out modulation and demodulation, isolation conversion exports restituted signal, corresponding output signal linear with input signal is adjusted to through zero point and full scale regulating circuit, analog signal after output circuit exports corresponding isolation conversion is to external equipment, and analog signal output circuit is shown in shown in Fig. 5, signal transmission after regulating circuit adjustment is to Micro-processor MCV, by Micro-processor MCV, AD conversion is carried out in front end amplification and filtered analog signal, by high-speed isolated circuit, output circuit output digit signals is to external equipment, digital signal output circuit is shown in shown in Fig. 6, high-speed isolated circuit adopts high-speed isolated chip, more than transmission speed 10M, the output of product is made to respond the change of input signal very fast, the transmitting and receiving unit of communicating circuit controls by Micro-processor MCV, during use by with upper machine communication, gather the relevant information of output signal or input signal.
Transducer of the present invention is by the independently accessory power supply separately established, accessory power supply is DC power supply, insulating power supply is DC/DC insulating power supply, accessory power supply and DC/DC insulating power supply are respectively signal input side and signal outlet side circuit supply, signal input, signal export and power supply is isolated mutually, greatly improve interference free performance and the load capacity of product, ensure that the reliability of signal data, both analog signal isolating corresponding analog signal can be converted to, also analog signal isolating corresponding digital signal can be converted to.
During enforcement, each parts epoxy resin encapsulated, in a shell, improves circuit integrity; Accessory power supply can connect two DC/DC insulating power supplies, and two DC/DC insulating power supplies are respectively power supply signal input side and signal outlet side circuit supply, improve circuit stability further; Also can connect distribution output circuit at input side, for ancillary equipment is powered.
Fig. 7 to Figure 22 is encapsulating structure schematic diagram of the present invention, and pin position layout adopts the 2.54mm integral multiple of national standard, and wiring is convenient in this package dimension pin layout, can better meet safety requirement.
Be only present pre-ferred embodiments in sum, all equivalence modifications of doing according to the application and prior art are added and are all considered as the technology of the present invention category.
Claims (2)
1. an active type analog signal isolating transducer, it is characterized in that comprising input circuit, input circuit is connected with modulation circuit, input circuit is connected with buffer circuit, buffer circuit is connected with demodulator circuit, be connected with regulating circuit, regulating circuit is provided with zero adjustment circuit and full scale regulating circuit, regulating circuit is connected with output circuit, regulating circuit is connected with the Micro-processor MCV with analog to digital converter, Micro-processor MCV is connected with high-speed isolated circuit and communicating circuit, high-speed isolated circuit is connected with output circuit, communicating circuit is connected with host computer, accessory power supply is connected with insulating power supply, accessory power supply is that buffer circuit prime is powered, insulating power supply is that buffer circuit rear class is powered.
2. active type analog signal isolating transducer according to claim 1, is characterized in that described each parts epoxy resin encapsulated is in a shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510578990.1A CN105245219A (en) | 2015-09-14 | 2015-09-14 | Active type analog signal isolation converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510578990.1A CN105245219A (en) | 2015-09-14 | 2015-09-14 | Active type analog signal isolation converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105245219A true CN105245219A (en) | 2016-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510578990.1A Pending CN105245219A (en) | 2015-09-14 | 2015-09-14 | Active type analog signal isolation converter |
Country Status (1)
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| CN (1) | CN105245219A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106169930A (en) * | 2016-06-22 | 2016-11-30 | 宁波三星医疗电气股份有限公司 | A kind of meritorious photoelectric yield circuit |
| CN113899935A (en) * | 2021-09-23 | 2022-01-07 | 南京史利姆电子科技有限公司 | Novel isolation method of electric quantity sensor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087147A (en) * | 2009-12-02 | 2011-06-08 | 上海元瑞信息技术有限公司 | Intrinsically safe explosionproof type intelligent temperature transmitting system |
| CN203024900U (en) * | 2012-12-26 | 2013-06-26 | 于广沅 | Temperature signal isolation transmitter for thermal resistor |
| CN103543679A (en) * | 2013-10-28 | 2014-01-29 | 深圳万讯自控股份有限公司 | Intelligent type resistance signal isolated gate |
| CN204886921U (en) * | 2015-09-14 | 2015-12-16 | 于广沅 | Active type analog signal keeps apart converter |
-
2015
- 2015-09-14 CN CN201510578990.1A patent/CN105245219A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087147A (en) * | 2009-12-02 | 2011-06-08 | 上海元瑞信息技术有限公司 | Intrinsically safe explosionproof type intelligent temperature transmitting system |
| CN203024900U (en) * | 2012-12-26 | 2013-06-26 | 于广沅 | Temperature signal isolation transmitter for thermal resistor |
| CN103543679A (en) * | 2013-10-28 | 2014-01-29 | 深圳万讯自控股份有限公司 | Intelligent type resistance signal isolated gate |
| CN204886921U (en) * | 2015-09-14 | 2015-12-16 | 于广沅 | Active type analog signal keeps apart converter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106169930A (en) * | 2016-06-22 | 2016-11-30 | 宁波三星医疗电气股份有限公司 | A kind of meritorious photoelectric yield circuit |
| CN113899935A (en) * | 2021-09-23 | 2022-01-07 | 南京史利姆电子科技有限公司 | Novel isolation method of electric quantity sensor |
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Application publication date: 20160113 |
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| WD01 | Invention patent application deemed withdrawn after publication |