CN201294490Y - Device for collecting and processing photoelectric coupling signal - Google Patents
Device for collecting and processing photoelectric coupling signal Download PDFInfo
- Publication number
- CN201294490Y CN201294490Y CNU2008201414998U CN200820141499U CN201294490Y CN 201294490 Y CN201294490 Y CN 201294490Y CN U2008201414998 U CNU2008201414998 U CN U2008201414998U CN 200820141499 U CN200820141499 U CN 200820141499U CN 201294490 Y CN201294490 Y CN 201294490Y
- Authority
- CN
- China
- Prior art keywords
- input
- signal
- coupling
- photoelectric
- output
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Networks Using Active Elements (AREA)
Abstract
The utility model discloses a photoelectric coupling signal collecting and processing device, an anti-reversion diode and a current-limiting resistance, which are connected on a signal input end in series, are connected with the output end of a photoelectric coupler which is connected with a resistance R2 through a parallel return circuit on the input end of the photoelectric coupler. The device takes the photoelectric coupler as a core, and realizes the electrical isolation in an input signal area and an output signal area through a capacitance which is connected on the photoelectric coupling input in parallel and resists the instant interference. The direct coupling, the capacitance and the transformer coupling of the prior art is replaced through the photoelectric coupling mode, which overcomes the defect that the capacitance and the transformer only can transmit alternating signals and can not transmit direct current signals. The device prevents the dangers that the prior art can not be blocked and is very easy to generate the interference of a power source earth wire, and burns a subsequent weak signal processing circuit. Since the input and the output of the photoelectric coupler are insulated with each other, the transmission of electrical signals has the unidirectivity, thereby the device has good electrical insulating ability and anti-interference ability. Since the input end of the photoelectric coupler belongs to a current type low-resistance component, the device has very strong common mode rejecting ability.
Description
Technical field
The utility model relates to a kind of signal coupling acquisition processing device.
Background technology
In the prior art signal coupling acquisition processing device is made up of current-limiting resistance R1 in parallel, the R2 of Fig. 2 ground connection and coupling capacitance C1 or transformer T1 shown in Figure 2 usually.Directly by capacitance coupling circuit control, its electric capacity, transformer can only transmit AC signal and can not transmit the direct current letter these two kinds of circuit, and the circuit anti-interference is relatively poor, and input signal and output signal can not realize electrical isolation completely.Because some electronic equipments is must acquired signal amplitude difference very big, adopt discrete device shown in Figure 2 directly to be coupled or shown in Figure 3 transformer coupled, might bring the treatment circuit of input high pressure or spike damage output low pressure fragility.Voltage to input will adopt different reduction voltage circuit processing to be unified into follow-up fiduciary level simultaneously.
The utility model is further improvement and the development to above-mentioned prior art.
Summary of the invention
For overcoming the weak point that above-mentioned prior art exists; the utility model provides a kind of anti-interference height; have very strong common mode inhibition capacity, and can satisfy input signal and output signal realizes electrical isolation completely, can protect the photoelectricity coupling acquisition processing device of subsequent process circuit.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of photoelectricity coupling signal acquiring processing unit, comprise current-limiting resistance, it is characterized in that, be connected on the counnter attack diode D1 and the current-limiting resistance R1 of signal input part series connection, by the shunt circuit of photoelectrical coupler U1 input, hold altogether with the photoelectrical coupler U1 output that is connected with resistance R 2 to be connected.
The utility model has following beneficial effect than prior art.
The utility model is connected on the counnter attack diode of signal input part, is core with the photoelectrical coupler, suppresses the electric capacity of instantaneous interference by being connected in parallel on optocoupler input, with the earth terminal of input, output signal altogether together, directly coupling or capacitive coupling.Replace directly coupling of prior art, electric capacity, transformer coupled with the photoelectricity coupled modes, overcome electric capacity, transformer can only transmit the shortcoming that AC signal can not be transmitted direct current signal.The power ground of having avoided prior art can not block very easily generation disturbs, and burns the prestige danger of follow-up weak signal treatment circuit.The photoelectricity coupling integrated circuit of forming is with respect to the conventional separators part, and reliability significantly improves.And can adapt to the very interior input signal of wide-voltage range.Owing to isolate mutually between the optical coupler input and output, signal of telecommunication transmission has characteristics such as one-way, thereby has good electrical isolation capabilities and antijamming capability.Input owing to optical coupler belongs to the low resistance element of current mode work again, thereby has very strong common mode inhibition capacity, and has realized that the interior voltage unification of the relative broad range that makes things convenient for subsequent conditioning circuit to handle is converted to the function of fiduciary level.
Description of drawings
Fig. 1 is photoelectricity coupling signal acquiring treatment circuit figure of the present utility model
Fig. 2 Fig. 3 is prior art electric capacity, transformer coupled signal acquisition processing circuit figure.
Embodiment
In the photoelectricity coupling acquisition process circuit of describing in Fig. 1, diode in series D1 and resistance R 1 are passed through parallel coupled capacitor C 1 loop of photoelectrical coupler U1 input, hold altogether with the photoelectrical coupler U1 output that is connected with resistance R 2 to be connected.Input signal and output signal path are electrical isolation, and can only unidirectionally be passed to output by input.Signal is through counnter attack diode D1, and current-limiting resistance R1 delivers to photoelectricity coupling and input.The signal of telecommunication driven for emitting lights diode (LED) of input makes it to send the light of certain wavelength, is received by photo-detector and produces photoelectric current, again through further amplifying back output.This has just finished the conversion of an electric light one electricity, thereby plays the effect of input, output, isolation.
Claims (3)
1. photoelectricity coupling signal acquiring processing unit, comprise current-limiting resistance, it is characterized in that, be connected on the counnter attack diode D1 and the current-limiting resistance R1 of signal input part series connection, by the shunt circuit of photoelectrical coupler U1 input, be connected with the photoelectrical coupler U1 output that is connected with resistance R 2.
2. photoelectricity coupling acquisition processing device as claimed in claim 1 is characterized in that the capacitor C 1 that suppresses instantaneous interference is connected in parallel on the optocoupler input.
3. photoelectricity coupling acquisition processing device as claimed in claim 1 is characterized in that all input signals and output signal path are realized electrical isolation by optocoupler U1, and can only unidirectionally be passed to output by input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201414998U CN201294490Y (en) | 2008-11-19 | 2008-11-19 | Device for collecting and processing photoelectric coupling signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201414998U CN201294490Y (en) | 2008-11-19 | 2008-11-19 | Device for collecting and processing photoelectric coupling signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201294490Y true CN201294490Y (en) | 2009-08-19 |
Family
ID=41007970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201414998U Expired - Lifetime CN201294490Y (en) | 2008-11-19 | 2008-11-19 | Device for collecting and processing photoelectric coupling signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201294490Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989856A (en) * | 2010-08-06 | 2011-03-23 | 许晓华 | Reverse connection prevention current-limiting circuit with externally input optical coupler |
| CN102073108A (en) * | 2010-11-29 | 2011-05-25 | 华为终端有限公司 | Optical coupler isolating circuit |
| CN103063972A (en) * | 2012-12-20 | 2013-04-24 | 江苏宏宝电子有限公司 | Photovoltaic grid-connected inverter direct current reverse-connection prevention detection system |
| CN104065369A (en) * | 2014-07-09 | 2014-09-24 | 南京工业大学 | Method and circuit for reducing power consumption of photoelectric isolating input collecting circuit |
| CN106817212A (en) * | 2016-12-15 | 2017-06-09 | 国网安徽省电力公司淮北供电公司 | A kind of device of short-distance and medium-distance high withstand voltage isolation communication |
| CN112731841A (en) * | 2020-12-26 | 2021-04-30 | 陕西航空电气有限责任公司 | Communication circuit of controller of aviation high-voltage brushless direct-current motor |
-
2008
- 2008-11-19 CN CNU2008201414998U patent/CN201294490Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989856A (en) * | 2010-08-06 | 2011-03-23 | 许晓华 | Reverse connection prevention current-limiting circuit with externally input optical coupler |
| CN102073108A (en) * | 2010-11-29 | 2011-05-25 | 华为终端有限公司 | Optical coupler isolating circuit |
| CN103063972A (en) * | 2012-12-20 | 2013-04-24 | 江苏宏宝电子有限公司 | Photovoltaic grid-connected inverter direct current reverse-connection prevention detection system |
| CN104065369A (en) * | 2014-07-09 | 2014-09-24 | 南京工业大学 | Method and circuit for reducing power consumption of photoelectric isolating input collecting circuit |
| CN106817212A (en) * | 2016-12-15 | 2017-06-09 | 国网安徽省电力公司淮北供电公司 | A kind of device of short-distance and medium-distance high withstand voltage isolation communication |
| CN112731841A (en) * | 2020-12-26 | 2021-04-30 | 陕西航空电气有限责任公司 | Communication circuit of controller of aviation high-voltage brushless direct-current motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201294490Y (en) | Device for collecting and processing photoelectric coupling signal | |
| JP2013537034A5 (en) | ||
| CN103424606A (en) | Frequency-adaptive low-voltage power carrier communication zero-crossing detection circuit | |
| MX2012001785A (en) | Optical receiver for receiving light and optoelectronic measuring arrangement. | |
| CN201349179Y (en) | Switching power supply circuit of pulping machine | |
| CN202548267U (en) | Circuit for detecting live wire and zero wire | |
| CN202975669U (en) | Low standby power-consumption control circuit | |
| CN101895216B (en) | State switching circuit of wide-voltage switch | |
| CN203984384U (en) | A kind of pair of photovoltaic optocoupler drives DC solid-state relay | |
| CN202518896U (en) | Photoelectric switch for elevator | |
| CN103780279A (en) | Indoor energy efficiency management terminal communication module | |
| CN201773146U (en) | Commercial power zero-crossing detection circuit | |
| CN202586326U (en) | Switching value acquisition circuit | |
| CN102820789A (en) | Alternating current zero and live wire identification conversion circuit | |
| CN201717796U (en) | Wide voltage switch state converting circuit | |
| CN204498045U (en) | Phototube Coupling power supply | |
| CN203675104U (en) | Communication module of indoor energy efficiency management terminal | |
| CN204422636U (en) | Alternating current signal detection circuit | |
| CN204347106U (en) | A kind of voltage sample buffer circuit | |
| CN104242689A (en) | Voltage-stabilizing power circuit and voltage-stabilizing power supply | |
| CN103944611B (en) | A kind of uneven feeding network system | |
| CN202772863U (en) | High-power photoelectric control device | |
| CN218735097U (en) | Multi-channel signal acquisition circuit of driving power supply and lighting device | |
| CN210894469U (en) | Backlight current detection circuit and device | |
| CN201157945Y (en) | Isolated argon arc-welding set welding gun switch signal capturing circuit of transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090819 |
|
| CX01 | Expiry of patent term |