CN213181959U - Alternating current power supply detection circuit - Google Patents
Alternating current power supply detection circuit Download PDFInfo
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- CN213181959U CN213181959U CN202022491147.9U CN202022491147U CN213181959U CN 213181959 U CN213181959 U CN 213181959U CN 202022491147 U CN202022491147 U CN 202022491147U CN 213181959 U CN213181959 U CN 213181959U
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Abstract
The utility model discloses an alternating current power supply detection circuitry, include: the system comprises an access end, a power management module, a photoelectric isolation detection module and a signal output end; the photoelectric isolation detection module is provided with a rear-stage circuit voltage input end, a first optocoupler, a first triode, a second triode, a first resistor and a second resistor, the signal output end is provided with two signal output pins, and the two pins respectively output a high level and a low level, so that the rear-stage circuit controlled by the high level is met, and the rear-stage circuit controlled by the low level is also met.
Description
Technical Field
The utility model relates to a power supply detection circuit field, in particular to alternating current power supply detection circuit.
Background
Most of the existing alternating current power supply detection circuits can only detect whether an alternating current exists in a preceding stage circuit, the function is single, a small part of the existing alternating current power supply detection circuits can be matched with a subsequent control circuit for use, a single control signal can be output to the subsequent control circuit, the application range is small, and the practicability is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an alternating current power supply detection circuitry aims at solving the problem that above-mentioned background art mentioned.
In order to achieve the above object, the utility model provides an alternating current power supply detection circuit, include: the system comprises an access end, a power management module, a photoelectric isolation detection module and a signal output end;
the access end is used for accessing alternating current;
the power supply management module is connected with the access end and is used for converting the alternating current into the current and reducing the voltage;
photoelectric isolation detection module is equipped with back level circuit voltage input end, first opto-coupler, first triode, first resistance and second resistance, the illuminator of first opto-coupler with power management module's output is connected, the anodal of first opto-coupler light receptor is connected back level circuit voltage input end, the base of first triode is connected to the negative pole of first opto-coupler light receptor, the projecting pole ground connection of first triode, connect behind the first resistance of back level circuit voltage input series connection and the second resistance the collecting electrode of first triode, signal output part's pin 2 connect in first resistance with between the second resistance, pin 1 is used for connecting back level circuit voltage, pin 4 ground connection.
Optionally, the optoelectronic isolation detection module is further provided with a second triode, a base of the second triode is connected with a collector of the first triode, an emitter of the second triode is grounded, and the collector of the second triode is connected with the pin 3 of the signal output end.
Optionally, the optoelectronic isolation detection module is further provided with a third resistor, and a collector of the first triode is connected with a base of the second triode through the third resistor.
Optionally, the optoelectronic isolation detection module further includes a fourth resistor and a fifth resistor, a negative electrode of the first optocoupler light receiver is connected in series with the fourth resistor and the fifth resistor and then grounded, and a base of the first triode is connected between the fourth resistor and the fifth resistor.
Optionally, the optoelectronic isolation detection module further includes a sixth resistor and a seventh resistor, and the sixth resistor and the seventh resistor are connected in series between the access terminal and the power management module.
Optionally, a first zener diode and a first capacitor are connected in parallel between pin 3 and pin 4 of the power management module.
Optionally, the optoelectronic isolation detection module is further provided with a second diode, a cathode of the second diode is connected to the voltage input end of the post-stage circuit, and an anode of the second diode is connected between the first resistor and the pin 2 of the signal output end.
The technical scheme of the utility model is that the first optocoupler, the first triode, the first resistor and the second resistor are arranged, the first optocoupler isolates the preceding-stage alternating current, when the preceding-stage circuit is switched on, the first triode is switched on, and the pin 2 of the signal output end outputs a low level; when the power is off during the preceding-stage alternating current, the first triode is cut off, and the pin 2 of the signal output end outputs a high level; therefore, the alternating current power supply detection circuit can output high-level control signals and low-level control signals, can be suitable for various post-stage control circuits, and is wide in application range and high in practicability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of an ac power detection circuit according to the present invention;
fig. 2 is a schematic structural diagram of another embodiment of the ac power detection circuit of the present invention.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides an alternating current power supply detection circuitry.
In the embodiment of the present invention, as shown in fig. 1, the back-stage circuit is exemplified by a PLC control circuit, the power supply voltage of the back-stage circuit is 12V, wherein the power supply management module is provided with a power supply management chip, the model is HD06, the model of the first optocoupler Q1 is EL817, and the models of the first triode Q2 and the second triode Q3 are 9013; the signal output terminal J2 has two signal output pins, pin 2 being power check1 and pin 3 being power check 2;
the alternating current power supply detection circuit includes: the system comprises an access end J1, a power management module, a photoelectric isolation detection module and a signal output end J2; the access end J1 is used for accessing alternating current of AC 100V-AC 264V, the access end J1 is connected with the alternating current in series and then connected with a sixth resistor R6 and a seventh resistor R7 in a voltage reduction mode to be connected with a pin 1 and a pin 2 of a power management chip, the power management module converts the accessed alternating current and outputs the converted alternating current from the pin 3 and the pin 4 after voltage reduction, a first voltage stabilizing diode D1 and a first capacitor C1 are arranged between the pin 3 and the pin 4 in parallel, the first voltage stabilizing diode D1 plays a voltage stabilizing role, the first capacitor C1 plays a filtering role and then is connected with the positive electrode and the negative electrode of a first optocoupler Q1 light emitter;
the power supply voltage of the PLC control circuit 12V is connected with a voltage input end ACC of a rear-stage circuit, the voltage input end ACC of the rear-stage circuit is connected with the positive electrode of a light receiver of a first optocoupler Q1, the negative electrode of the light receiver is connected with the base electrode of a first triode Q2, the emitting electrode of the first triode Q2 is grounded, a first resistor R1 and a second resistor R2 are connected between the voltage input end ACC of the rear-stage circuit of 12V and the collecting electrode of a first triode Q2 in series, a pin 2power check1 of a signal output end J2 is connected at the middle position of the first resistor R1 and the second resistor R2, a pin 1 is connected with the voltage of 12V of the PLC control circuit, and a pin; firstly, the front-stage alternating current is isolated by a first light coupling-in Q1 line, when the front-stage alternating current is connected, a first triode Q2 is connected, and a pin 2power check1 of a signal output end outputs low level; when the power is off during the previous stage alternating current, the first triode Q2 is cut off, and the pin 2power check1 of the signal output end outputs high level.
Further, as shown in fig. 2, the present embodiment further includes a second triode, a collector of the first triode Q2 is connected to a base of the second triode Q3, an emitter of the first triode Q2 is grounded, an emitter of the second triode Q3 is connected to the pin 3power check2 of the signal output terminal J2, and an emitter of the second triode Q3 is grounded;
when the alternating current of the access terminal J1 is electrified, the first optocoupler Q1 emits light, the light receiver is turned on, so that the first triode Q2 is turned on and grounded, the second triode Q3 is turned off, and at this time, the pin 2power check1 of the signal output terminal J2 is divided by the first resistor R1 and the second resistor R2 to output a low level;
when the alternating current of the access terminal J1 is powered off, the first triode Q2 is cut off, the second triode Q3 is conducted and grounded, at this time, the pin of the signal output terminal J2 outputs a high level, and the pin 3 outputs a low level;
thereby signal output part J2 has two output pin, can export low level and high level simultaneously moreover, so the utility model discloses technical scheme's back stage circuit both can satisfy high level control's control circuit, can satisfy low level control's control circuit again, and application scope is wide, and the practicality is strong.
Further, please refer to fig. 2 in combination, in the embodiment of the present invention, the optoelectronic isolation detection module further includes a third resistor R3, a fourth resistor R4 and a fifth resistor R5, wherein the negative electrode of the light receiver of the first optocoupler Q1 is connected in series with the fourth resistor R4 and the fifth circuit is grounded, the fifth resistor R5 is a large resistor, and the base of the first triode Q2 is connected between the fourth resistor R4 and the fifth resistor R5, so as to protect the first triode Q2; the third resistor R3 is connected between the emitter of the first triode Q2 and the base of the second triode Q3, and plays a role in protecting the second triode Q3, so that the circuit is safer and more reliable.
Further, please refer to fig. 2 in combination, in the embodiment of the present invention, the optoelectronic isolation detection module is further provided with a second diode D2, a cathode of the second diode D2 is connected to the post-stage circuit voltage input ACC, an anode of the second diode D2 is connected between the first resistor R1 and the pin 2 of the signal output terminal J2, and the second diode D2 is provided to prevent the generation of the reverse voltage, so that the detection result is more accurate.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (7)
1. An alternating current power supply detection circuit, comprising: the system comprises an access end, a power management module, a photoelectric isolation detection module and a signal output end;
the access end is used for accessing alternating current;
the power supply management module is connected with the access end and is used for converting the alternating current into the current and reducing the voltage;
photoelectric isolation detection module is equipped with back level circuit voltage input end, first opto-coupler, first triode, first resistance and second resistance, the illuminator of first opto-coupler with power management module's output is connected, the anodal of first opto-coupler light receptor is connected back level circuit voltage input end, the base of first triode is connected to the negative pole of first opto-coupler light receptor, the projecting pole ground connection of first triode, connect behind the first resistance of back level circuit voltage input series connection and the second resistance the collecting electrode of first triode, signal output part's pin 2 connect in first resistance with between the second resistance, pin 1 is used for connecting back level circuit voltage, pin 4 ground connection.
2. The alternating current power supply detection circuit as claimed in claim 1, wherein the photo-isolation detection module is further provided with a second triode, a base of the second triode is connected with a collector of the first triode, an emitter of the second triode is grounded, and a collector of the second triode is connected with a pin 3 of the signal output end.
3. The alternating current power supply detection circuit as claimed in claim 2, wherein the photo-isolation detection module is further provided with a third resistor, and the collector of the first triode is connected with the base of the second triode through the third resistor.
4. The alternating current power supply detection circuit according to claim 1, wherein the optoelectronic isolation detection module further comprises a fourth resistor and a fifth resistor, a negative electrode of the first opto-coupler photo-receiver is connected in series with the fourth resistor and the fifth resistor and then grounded, and a base of the first triode is connected between the fourth resistor and the fifth resistor.
5. The alternating current power supply detection circuit of claim 1, wherein the optoelectronic isolation detection module further comprises a sixth resistor and a seventh resistor, and the sixth resistor and the seventh resistor are connected in series between the access terminal and the power management module.
6. The alternating current power supply detection circuit of claim 1, wherein a first zener diode and a first capacitor are connected in parallel between pin 3 and pin 4 of the power management module.
7. The alternating current power supply detection circuit according to claim 1, wherein the optoelectronic isolation detection module is further provided with a second diode, a cathode of the second diode is connected to the voltage input terminal of the post-stage circuit, and an anode of the second diode is connected between the first resistor and the pin 2 of the signal output terminal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022491147.9U CN213181959U (en) | 2020-11-02 | 2020-11-02 | Alternating current power supply detection circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022491147.9U CN213181959U (en) | 2020-11-02 | 2020-11-02 | Alternating current power supply detection circuit |
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| CN213181959U true CN213181959U (en) | 2021-05-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466735A (en) * | 2021-09-06 | 2021-10-01 | 西安热工研究院有限公司 | Variable power supply monitoring circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466735A (en) * | 2021-09-06 | 2021-10-01 | 西安热工研究院有限公司 | Variable power supply monitoring circuit |
| CN113466735B (en) * | 2021-09-06 | 2022-02-11 | 西安热工研究院有限公司 | Variable power supply monitoring circuit |
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