CN205158051U - Bit volume sampling circuit - Google Patents
Bit volume sampling circuit Download PDFInfo
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- CN205158051U CN205158051U CN201520930771.0U CN201520930771U CN205158051U CN 205158051 U CN205158051 U CN 205158051U CN 201520930771 U CN201520930771 U CN 201520930771U CN 205158051 U CN205158051 U CN 205158051U
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- resistance
- photoelectrical coupler
- power supply
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- 238000005070 sampling Methods 0.000 title abstract description 3
- 230000005693 optoelectronics Effects 0.000 abstract description 7
- 238000002955 isolation Methods 0.000 abstract description 3
- 230000004907 flux Effects 0.000 abstract 2
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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Abstract
The utility model discloses a bit volume sampling circuit, including optoelectronic coupler, unidirectional flux component, first resistance, second resistance, third resistance, fourth resistance and power, the first end of third ohmic connection to optoelectronic coupler is passed through as first outside access point, the other end of fourth resistance to the one end of fourth resistance, the outside access point of anodal conduct second of power, the negative pole of power is through the second end of first ohmic connection to optoelectronic coupler, unidirectional flux component parallel connection is between optoelectronic coupler's first end and second end, optoelectronic coupler's third end still is used for connecting the input of outside singlechip through the 2nd grounding, optoelectronic coupler's third end. The utility model discloses both having can be used to the volume of inserting the active switch, and also can being used for the volume of inserting the passive switch, and can also realize the effective isolation of forceful electric power, the very big improvement of security still need not plus supplies power simultaneously.
Description
Technical field
The utility model belongs to vehicle electric road technique field, more specifically, relates to a kind of bit quantity sample circuit.
Background technology
In control system for automobile, due to be non-connect the earth system, interference between signal and insulation request higher, once there be a local process bad, system just can be interfered, and particularly strong power part is to weak current part, have an impact more easily by some signal couplings, and the so exactly equipment of object that will control, therefore, effectively can transmit the circuit that useful signal can isolate again the possible impact of forceful electric power reliably and just become the preferred orientations of automobile-used circuit.
The shortcoming of current measurement circuit of the prior art: external 24V power supply; And original signal source is often with forceful electric power, great potential safety hazard can be brought.
Utility model content
For above defect or the Improvement requirement of prior art, the utility model provides a kind of bit quantity sample circuit, and its object needs the technical matters of additional power supply solving original On-off signal.
The utility model provides a kind of bit quantity sample circuit, comprises photoelectrical coupler, one-way conduction element, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4 and power supply; One end of described 4th resistance R4 is as the first foreign access point J1-1, and the other end of described 4th resistance R4 is connected to the first end of described photoelectrical coupler by described 3rd resistance; The positive pole of described power supply is as the second foreign access point J1-2, and the negative pole of described power supply is connected to the second end of described photoelectrical coupler by described first resistance R1; Described one-way conduction element in parallel is connected between the described first end of described photoelectrical coupler and described second end; 3rd end of described photoelectrical coupler is by described second resistance R2 ground connection, and the 3rd end of described photoelectrical coupler is also for connecting the input end of external microcontroller; 4th end of described photoelectrical coupler for connecting power supply, such as+3.3V.Wherein, in photoelectrical coupler, the anode of diode is as first end, and negative electrode is as the second end, and in photoelectrical coupler, the emitter of triode is as the 3rd end, and collector is as the 4th end.
Further, also comprise insurance resistance RP01, be connected between the positive pole of described power supply and described second foreign access point.
Further, described insurance resistance RP01 is thermistor.
Further, described power supply is 24V power supply.
Further, described one-way conduction element is diode D1, and the negative electrode of described diode D1 is connected with the first end of described photoelectrical coupler, and anode is connected with the second end of described photoelectrical coupler.
Further, the model of described photoelectrical coupler is PS2701.
Further, the resistance of described second resistance is 4.7K Ω, and the resistance of the first resistance R1, the 3rd resistance R3 and the 4th resistance R4 is 1K Ω.
The utility model tool has the following advantages: both accessible active switch amounts, also accessible passive switch amount; Special connecting structure due to optocoupler primary circuit can make forceful electric power effectively be isolated, and security greatly improves.Have optocoupler optoelectronic insulation isolating power and without the need to additional power supply.
Accompanying drawing explanation
Fig. 1 is the physical circuit figure of the bit quantity sample circuit that the utility model provides;
Fig. 2 is the physical circuit figure of the bit quantity sample circuit that provides of the utility model and three kinds of on-off circuits.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.In addition, if below in described each embodiment of the utility model involved technical characteristic do not form conflict each other and just can mutually combine.
Isolation bit of the present utility model measures transmission circuit and should this problem design just, and also demonstrates its reliability in the application of reality.The utility model relates to the connection of electric signal, specifically a kind of bit quantity sample circuit; Be intended to solve original On-off signal and need additional powerup issue.In the circuit that the utility model provides, importation carries and powers for 24V, only needs the on-off model of input to access.
Fig. 1 shows the physical circuit of the bit quantity sample circuit that the utility model provides, and for convenience of explanation, illustrate only the part relevant to the utility model, details are as follows:
Bit quantity sample circuit comprises photoelectrical coupler, one-way conduction element, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4 and power supply; One end of 4th resistance R4 is as the first foreign access point J1-1, and the other end of the 4th resistance R4 is connected to the first end of photoelectrical coupler by the 3rd resistance; The positive pole of power supply is as the second foreign access point J1-2, and the negative pole of power supply is connected to the second end of photoelectrical coupler by the first resistance R1; One-way conduction element in parallel is connected between the first end of photoelectrical coupler and the second end; 3rd end of photoelectrical coupler is by the second resistance R2 ground connection, and the 3rd end of photoelectrical coupler is also for connecting the input end of external microcontroller; 4th end of photoelectrical coupler is for connecting power supply.
In the utility model, bit quantity sample circuit also comprises insurance resistance RP01, is connected between the positive pole of power supply and the second foreign access point.Wherein, insurance resistance RP01 is thermistor, prevents from damaging elementary input circuit during an outside access high-voltage great-current.
In the utility model, one-way conduction element can be that the negative electrode of diode D1, diode D1 is connected with the first end of described photoelectrical coupler, and anode is connected with the second end of photoelectrical coupler.
In order to further description the utility model, details are as follows for existing composition graphs 1, Fig. 2 and instantiation:
With photoelectrical coupler PS2701 for core, form bit quantity sample circuit.Form emitter string one resistance to ground by the secondary light triode of photoelectrical coupler PS2701, resistance upper end DI1 receives the input end of single-chip microcomputer; Special resistance R2 gets 4.7--10K Ω; The mouth of single-chip microcomputer can be any single-chip microcomputer i/o mouth.The primary diode of photoelectrical coupler is in parallel with protection diode D1, form elementary BIT with current-limiting resistance R1, R3, R4,24V power sources in series again measures sample circuit.It is BAW56LT1G that special diode D1 gets model, and resistance R1, R3, R4 get 1K Ω, and power supply is the elementary maximum current 8mA of 24V photoelectrical coupler.
External switch circuit is as shown in A, B, the C in Fig. 2, and any one in three kinds can accept circuit with above-mentioned bit quantity and coordinate.External switch amount circuit A is passive dry contact, can be the normally-open normally-close contact of relay, and switch etc.; External switch amount circuit B is emitter open ended transistor switch amount circuit, is the output of a certain circuit; External switch amount circuit C is photoelectrical coupler output type switching value circuit, is also the output of a certain circuit.With the series loop that the primary diode of photoelectrical coupler is core; This circuit is due to self-powered, and foreign access point no longer can bother and will to seal in after power supply in reinsertion circuit.Use to provide to chat to engineering and greatly facilitate.Utilize the light of the primary and secondary of photoelectrical coupler to isolate the electrical equipment physical isolation realizing the extreme circuit of point of external circuit and the secondary connection of photoelectrical coupler simultaneously.
When external switch amount gets involved, 24V power supply flow through R3 R4 RP01 the elementary formation loop of R1 and optocoupler, elementary luminotron is luminous, the conducting of optocoupler secondary light-operated triode exposure, secondary loop electric current through 3V power supply through the secondary and resistance R2 of optocoupler to power supply, DI1 point current potential becomes 3V from 0V, and this voltage jump is detected by single-chip processor i/o mouth, namely detect that external switch amount closes, have input to come in.
The utility model is well suited for the sampling to the signal that opens the light that side is connected with forceful electric power, and the security of system is greatly improved.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (7)
1. a bit quantity sample circuit, is characterized in that, comprises photoelectrical coupler, one-way conduction element, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4 and power supply;
One end of described 4th resistance R4 is as the first foreign access point J1-1, and the other end of described 4th resistance R4 is connected to the first end of described photoelectrical coupler by described 3rd resistance;
The positive pole of described power supply is as the second foreign access point J1-2, and the negative pole of described power supply is connected to the second end of described photoelectrical coupler by described first resistance R1;
Described one-way conduction element in parallel is connected between the described first end of described photoelectrical coupler and described second end;
3rd end of described photoelectrical coupler is by described second resistance R2 ground connection, and the 3rd end of described photoelectrical coupler is also for connecting the input end of external microcontroller;
4th end of described photoelectrical coupler is for connecting power supply.
2. bit quantity sample circuit as claimed in claim 1, is characterized in that, also comprises insurance resistance RP01, is connected between the positive pole of described power supply and described second foreign access point.
3. bit quantity sample circuit as claimed in claim 2, it is characterized in that, described insurance resistance RP01 is thermistor.
4. bit quantity sample circuit as claimed in claim 1, it is characterized in that, described power supply is 24V power supply.
5. bit quantity sample circuit as claimed in claim 1, it is characterized in that, described one-way conduction element is diode D1, and the negative electrode of described diode D1 is connected with the first end of described photoelectrical coupler, and anode is connected with the second end of described photoelectrical coupler.
6. the bit quantity sample circuit as described in any one of claim 1-5, is characterized in that, the model of described photoelectrical coupler is PS2701.
7. bit quantity sample circuit as claimed in claim 6, it is characterized in that, the resistance of described second resistance is 4.7K Ω, and the resistance of the first resistance R1, the 3rd resistance R3 and the 4th resistance R4 is 1K Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520930771.0U CN205158051U (en) | 2015-11-19 | 2015-11-19 | Bit volume sampling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520930771.0U CN205158051U (en) | 2015-11-19 | 2015-11-19 | Bit volume sampling circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205158051U true CN205158051U (en) | 2016-04-13 |
Family
ID=55693724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520930771.0U Active CN205158051U (en) | 2015-11-19 | 2015-11-19 | Bit volume sampling circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205158051U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112992619A (en) * | 2021-02-07 | 2021-06-18 | 青岛博宁福田智能交通科技发展有限公司 | Emergency button switch interface and subway gate |
-
2015
- 2015-11-19 CN CN201520930771.0U patent/CN205158051U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112992619A (en) * | 2021-02-07 | 2021-06-18 | 青岛博宁福田智能交通科技发展有限公司 | Emergency button switch interface and subway gate |
| CN112992619B (en) * | 2021-02-07 | 2022-06-03 | 青岛博宁福田智能交通科技发展有限公司 | Emergency button switch interface and subway floodgate machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20180428 Granted publication date: 20160413 |
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| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20210428 Granted publication date: 20160413 |
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| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20210428 Granted publication date: 20160413 |
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| PD01 | Discharge of preservation of patent |
Date of cancellation: 20240428 Granted publication date: 20160413 |