CN211043634U - High-voltage circuit on-off detection circuit and device - Google Patents
High-voltage circuit on-off detection circuit and device Download PDFInfo
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- CN211043634U CN211043634U CN201921326963.5U CN201921326963U CN211043634U CN 211043634 U CN211043634 U CN 211043634U CN 201921326963 U CN201921326963 U CN 201921326963U CN 211043634 U CN211043634 U CN 211043634U
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Abstract
The embodiment of the present disclosure provides a high-voltage circuit on-off detection circuit and device, the circuit includes: the photoelectric coupler is connected in series in the high-voltage circuit and comprises a light-emitting diode and a phototriode, the positive pole and the negative pole of the light-emitting diode are connected in series in the high-voltage circuit, and the emitting electrode of the phototriode is grounded; the capacitor is connected in parallel with the collector and the emitter of the phototriode; one end of the divider resistor is connected with the collector of the phototriode, and the other end of the divider resistor is connected with the anode of the low-voltage power supply; and the signal detection branch circuit is connected with the collector of the phototriode and used for outputting a low-level signal or a high-level signal according to the connection or disconnection of the high-voltage circuit.
Description
Technical Field
Embodiments of the present disclosure relate generally to the field of electrical technology, and more particularly, to a high voltage circuit on-off detection circuit and device.
Background
Under the era background that the internet of things is closely related to modern life, various electric appliances accompanying our lives are slowly integrated into the internet of things. However, high-power electrical appliances are commonly used in high-voltage circuits, the single-chip microcomputer is required to be connected to the electrical appliances in the high-voltage circuits when the single-chip microcomputer is required to acquire the states of the electrical appliances, most of the single-chip microcomputers cannot be directly connected with the high-voltage circuits, and otherwise components on the equipment can be burnt.
In most of the design of the circuits of the internet of things equipment, the working state of the electric equipment, namely the on-circuit or the off-circuit, needs to be acquired frequently, so that a complex analog current acquisition circuit needs to be designed to adjust the voltage and the current so as to achieve the working voltage and the current needed by the electric equipment and electric elements in the circuit, the biggest defect of the design is that the number of required electric components is large, the size is large, the portability of the whole equipment is poor, various adapters are needed, the acquisition of electric signals of the equipment is inconvenient, and the design of the circuit is complicated, whether the electric signals can be acquired accurately or not is a very headache problem for developers of the internet of things equipment, except for special requirements of designing analog current acquisition circuits by themselves, a general efficient and low-cost analog current acquisition scheme with high efficiency is generally to directly purchase analog quantity acquisition modules of special manufacturers (commonly called adam modules), although the adam modules in the market have very flexible choices in price, performance and channel number, the cost of the signal acquisition modules is obviously increased when the adam modules in price, the price of the products is not only zero, but also the cost of the development of the signals is increased, and the cost of the extra signals is increased when the development of the adam modules in the conventional analog quantity acquisition process of the analog quantity of the analog acquisition modules is obviously, so that the analog quantity acquisition of the analog quantity acquisition of the analog modules is increased, the cost of the analog modules is increased, the analog modules, the cost of the analog modules is increased, the cost of the analog modules is increased, the cost of the analog quantity of the analog modules is increased, the analog modules is also increased, the cost of the analog modules is increased, the cost of the analog modules is.
Disclosure of Invention
According to the embodiment of the disclosure, a high-voltage circuit on-off detection circuit and a high-voltage circuit on-off detection device are provided.
In a first aspect of the present disclosure, there is provided a high voltage circuit on-off detection circuit, including: the photoelectric coupler comprises a light emitting diode and a phototriode, wherein the anode and the cathode of the light emitting diode are connected in series with a high-voltage circuit, and the emitting electrode of the phototriode is grounded; the capacitor is connected in parallel with the collector and the emitter of the phototriode; one end of the divider resistor is connected with the collector of the phototriode, and the other end of the divider resistor is connected with the anode of the low-voltage power supply; and the signal detection branch circuit is connected with the collector of the phototriode and used for outputting a low-level signal or a high-level signal according to the connection or disconnection of the high-voltage circuit.
The above aspect and any possible implementation manner further provide an implementation manner, wherein a resistor and a rectifier diode are connected between the positive electrode of the light emitting diode and the high-voltage circuit, the negative electrode of the rectifier diode is connected to one end of the resistor, and the positive electrode of the light emitting diode is connected to the other end of the resistor.
The above aspect and any possible implementation manner further provide an implementation manner, wherein a protection resistor is connected between the cathode of the light emitting diode and the high-voltage circuit.
In a second aspect of the present disclosure, there is provided a high-voltage circuit on-off detection device comprising the high-voltage circuit on-off detection circuit as described in any one of the first aspects.
According to the high-voltage circuit, the light emitting diode of the photoelectric coupler is connected in series in the high-voltage circuit, whether the light emitting diode emits light is controlled through the on-off of the high-voltage circuit, so that the short circuit or the open circuit of the phototriode is controlled, the signal output by the signal detection branch circuit is detected to be a high-level signal or a low-level signal, the on-off state of the high-voltage circuit is judged, the checking workload of a hardware circuit is greatly reduced, and the working efficiency is improved.
It should be understood that the statements herein reciting aspects are not intended to limit the critical or essential features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description.
Drawings
The above and other features, advantages and aspects of various embodiments of the present disclosure will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, like or similar reference characters designate like or similar elements, and wherein:
fig. 1 shows a circuit diagram of a high voltage switching circuit according to an embodiment of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some, but not all embodiments of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
Fig. 1 shows a circuit diagram of a high voltage switching circuit according to an embodiment of the present disclosure. As shown in fig. 1, the circuit includes a photocoupler, a capacitor C, a voltage dividing resistor R1, and a signal detection branch SIG.
The photoelectric coupler comprises a light emitting diode D1 and a phototriode VT.
The led D1 is connected in series in the high-voltage circuit, and when the high-voltage circuit is in a closed state, the led D1 is turned on, and when the high-voltage circuit is in an open state, the led D1 is not turned on.
A capacitor C is connected in parallel between a collector C and an emitter e of the phototriode VT, one end of a divider resistor is connected to the collector C, the other end of the divider resistor is connected to a positive electrode VCC of a low-voltage power supply, and the emitter e is grounded.
The signal detection sub-circuit SIG is connected with the collector c of the phototriode VT and used for outputting a low level signal or a high level signal according to the access or the open circuit of the high-voltage circuit, and the on-off state of the high-voltage circuit can be detected only by detecting the high level signal or the low level signal output by the signal detection sub-circuit SIG.
In some embodiments, to ensure stable light emission of the led D1, a resistor R2 and a rectifier diode D2 may be connected between the anode of the led D1 and the high voltage circuit, the cathode of the rectifier diode D2 is connected to one end of the resistor R2, and the anode of the led D1 is connected to the other end of the resistor R2.
In some embodiments, to prevent the led D1 from being burned out, a protection resistor R3 may be connected between the cathode of the led D1 and the high voltage circuit.
In an example, if the high-voltage circuit is a dc high-voltage circuit, the low-voltage power supply selects a dc power supply, and when the dc high-voltage circuit is in the on state, the light emitting diode D1 is turned on, so that the light emitting diode VT is in the short-circuit state, that is, the signal detection branch SIG is directly grounded, and at this time, the signal detection branch SIG outputs a low level signal.
In one example, if the high-voltage circuit is a dc high-voltage circuit, the low-voltage power supply is a dc power supply, and when the dc high-voltage circuit is in an off state, the light emitting diode D1 is not turned on, and at this time, the light emitting diode does not emit light, and the phototriode is in an off state, so the signal detection branch SIG is equivalent to the positive electrode VCC directly connected to the low-voltage power supply, and outputs a high-level signal.
In one example, if the high-voltage circuit is an ac high-voltage circuit, the low-voltage power source is an ac power source, and the ac high-voltage circuit is in an off state, no current flows through the circuit, and the signal detection branch SIG outputs a high-level signal similar to that of the dc high-voltage circuit in the off state.
In an example, if the high-voltage circuit is an ac high-voltage circuit, and the low-voltage power supply is an ac power supply, when the ac high-voltage circuit is in a pass state, due to the existence of the rectifier diode D2, the light emitting diode D1 is turned on and emits light in the positive half cycle of the ac power, the phototriode VT is in a short-circuit state, and at this time, the signal detection branch SIG is directly grounded to output a low-level signal; light emitting diode D1 is nonconducting in the negative half cycle of alternating current, and phototriode VT is the open circuit state this moment, and the low voltage power supply charges for electric capacity C, through setting up electric capacity C, makes its charge time be less than the half cycle of high voltage alternating current far away, and at this moment, signal detection branch SIG exports low level.
In this embodiment, the light emitting diode D1 of the photocoupler is connected in series in the high voltage circuit, and the on/off of the high voltage circuit is used to control whether the light emitting diode D1 emits light, so as to control the short circuit or the open circuit of the phototriode VT, and detect whether the signal output by the signal detection branch is a high level signal or a low level signal, so as to determine the on/off state of the high voltage circuit, thereby greatly reducing the workload of troubleshooting of the hardware circuit, and improving the working efficiency.
In another aspect, the present application provides a high voltage circuit on-off detection device, including the above-mentioned high voltage circuit on-off detection circuit.
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims (4)
1. A high-voltage circuit on-off detection circuit, characterized by comprising:
the photoelectric coupler comprises a light emitting diode and a phototriode, wherein the anode and the cathode of the light emitting diode are connected in series with a high-voltage circuit, and the emitting electrode of the phototriode is grounded;
the capacitor is connected in parallel with the collector and the emitter of the phototriode;
one end of the divider resistor is connected with the collector of the phototriode, and the other end of the divider resistor is connected with the anode of the low-voltage power supply;
and the signal detection branch circuit is connected with the collector of the phototriode and used for outputting a low-level signal or a high-level signal according to the connection or disconnection of the high-voltage circuit.
2. The on-off detection circuit for the high-voltage circuit according to claim 1, wherein a resistor and a rectifier diode are connected between the anode of the light emitting diode and the high-voltage circuit, the cathode of the rectifier diode is connected with one end of the resistor, and the anode of the light emitting diode is connected with the other end of the resistor.
3. The on-off detection circuit for the high-voltage circuit according to claim 1, wherein a protection resistor is connected between a cathode of the light emitting diode and the high-voltage circuit.
4. A high-voltage circuit on-off detection device characterized by comprising the high-voltage circuit on-off detection circuit according to any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921326963.5U CN211043634U (en) | 2019-08-15 | 2019-08-15 | High-voltage circuit on-off detection circuit and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921326963.5U CN211043634U (en) | 2019-08-15 | 2019-08-15 | High-voltage circuit on-off detection circuit and device |
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| CN211043634U true CN211043634U (en) | 2020-07-17 |
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| CN201921326963.5U Expired - Fee Related CN211043634U (en) | 2019-08-15 | 2019-08-15 | High-voltage circuit on-off detection circuit and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112230164A (en) * | 2020-10-23 | 2021-01-15 | 安徽森度科技有限公司 | Self-checking method of intelligent grounding device |
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2019
- 2019-08-15 CN CN201921326963.5U patent/CN211043634U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112230164A (en) * | 2020-10-23 | 2021-01-15 | 安徽森度科技有限公司 | Self-checking method of intelligent grounding device |
| CN112230164B (en) * | 2020-10-23 | 2024-04-02 | 安徽森度科技有限公司 | Self-checking method of intelligent grounding device |
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Granted publication date: 20200717 |