CN218003674U - Flash-off state detection circuit and electronic device - Google Patents
Flash-off state detection circuit and electronic device Download PDFInfo
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- CN218003674U CN218003674U CN202221822769.8U CN202221822769U CN218003674U CN 218003674 U CN218003674 U CN 218003674U CN 202221822769 U CN202221822769 U CN 202221822769U CN 218003674 U CN218003674 U CN 218003674U
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Abstract
The utility model discloses a sudden strain of a muscle state detection circuitry, electron device, wherein, above-mentioned sudden strain of a muscle state detection circuitry includes: the current limiting resistor, the isolation optocoupler and the control circuit are connected in series; the current limiting resistor is connected with the isolation optocoupler in series and is used for limiting a second current input by the alternating current power supply into a first current; the isolation optocoupler is used for comparing a first current input at the input end of the isolation optocoupler with a preset working current corresponding to the isolation optocoupler and outputting a level signal according to a comparison result; and the control circuit is connected with the output end of the isolation optocoupler in series and is used for detecting whether the alternating current power supply is in flash through the level signal. The problems of high cost, low accuracy and the like of flash detection in the related technology are solved.
Description
Technical Field
The utility model relates to an intelligence house technical field particularly, relates to a sudden strain of a muscle state detection circuitry, electron device.
Background
Along with the development of the smart home industry, the types of smart appliances are increasingly diversified. The intelligent electrical appliance can be disconnected after the traditional local power switch is closed, and then the terminal can not remotely control the intelligent electrical appliance. Therefore, the flash switch is widely applied to smart home devices. In a conventional state, the flash switch keeps the power supply and the electric load connected, the flash switch is disconnected from the power supply and the electric load connected when being pressed by external force, and the flash switch is rapidly recovered to the conventional state after the external force is removed.
However, the circuit structure of the existing flash detection circuit is complex, and the cost of components is high.
How to improve the effectiveness of the flash detection and reduce the cost of the flash detection circuit has become an urgent problem to be solved.
Aiming at solving the problems of higher cost, low accuracy and the like of flash detection in the related technology, an effective solution is not provided.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a flash state detection circuitry, electron device to in solving the correlation technique at least, the cost of having solved flash detection in the correlation technique is higher, the degree of accuracy low grade problem.
According to the utility model discloses an embodiment provides a flash status detection circuit, include: the current limiting resistor, the isolation optocoupler and the control circuit are connected in series; the current limiting resistor is connected with the isolation optocoupler in series and used for limiting a second current input by an alternating current power supply into a first current; the isolation optocoupler is used for comparing the first current input at the input end of the isolation optocoupler with a preset working current corresponding to the isolation optocoupler and outputting a level signal according to a comparison result; the control circuit is connected with the output end of the isolation optocoupler in series and used for detecting whether the alternating current power supply is in flash break or not through the level signal.
Optionally, an input end of the above-mentioned flash state detection circuit is connected to an output end of a flash switch, wherein an input end of the flash switch is connected to an ac power supply, and the flash switch is a self-rebounding switch.
Optionally, the current limiting resistor includes: the current limiting circuit comprises a first current limiting resistor and a second current limiting resistor, wherein the resistance value of the first current limiting resistor is the same as that of the second current limiting resistor; the first current-limiting resistor is arranged on a live wire branch corresponding to the alternating current power supply; and the second current-limiting resistor is arranged on the zero line branch corresponding to the alternating-current power supply.
Optionally, the flash status detection circuit further includes: a reverse protection diode; the reverse protection diode is connected with the input ends of the alternating current power supply and the isolation optocoupler in parallel respectively and used for conducting when an alternating current waveform corresponding to the alternating current power supply is in a negative half shaft.
Optionally, the isolation optocoupler includes: a light emitting diode; the light emitting diode is used for emitting light after the second current input by the input end of the isolation optocoupler is greater than or equal to a preset working current, and the preset working current is the lowest current of the light emitting diode entering a light emitting state.
Optionally, the isolation optocoupler further includes: a photo transistor; the phototriode is used for entering a conducting state under the condition that the base electrode of the phototriode receives light rays emitted by the light emitting diode, and outputting a preset low level of the phototriode in the conducting state; or after the light emitting diode is determined not to be in the light emitting state, the light emitting diode enters a cut-off state, and the preset high level of the phototriode in the cut-off state is output.
Optionally, the isolation optocoupler further includes: a third resistor and a first capacitor; the third resistor is connected with the collector of the phototriode and used for dividing the preset voltage loaded on the collector to obtain a third voltage loaded on the collector of the phototriode; the first capacitor is connected with the phototriode in parallel and used for providing fourth voltage for the phototriode.
Optionally, the control circuit at least includes: the processor is used for determining that the alternating current power supply is in a flash state under the condition that the duration time corresponding to the high level in the level signal output by the flash state detection circuit is longer than the preset time, generating a driving signal corresponding to the flash state, and sending the driving signal to the driving circuit in a preset communication mode; the level signal includes: a high level and a low level; the driving circuit is connected with the processor in series and used for controlling a load connected with the driving circuit in series according to a driving signal sent by the processor.
Optionally, the control circuit further comprises: the communication circuit is connected with the processor in series and used for establishing a communication channel between the driving circuit and the processor according to a preset communication mode so as to send a driving signal existing in the processor to the driving circuit through the communication channel.
According to another embodiment of the present invention, there is provided an electronic apparatus, including: an isolation optocoupler and a control circuit; the isolation optocoupler is used for comparing a first current input at the input end of the isolation optocoupler with a preset working current corresponding to the isolation optocoupler and outputting a level signal according to a comparison result; and the control circuit is used for detecting whether the alternating current power supply is in flash break or not through the level signal.
Optionally, the electronic device further comprises: the load control unit controls the load unit according to a signal corresponding to the detected flash-off state in the circuit.
According to the utility model discloses another embodiment still provides an electronic device's control system, not only contains electronic device, still includes: the input end of the flash switch is connected with an alternating current power supply in series, and the output end of the flash switch is connected with the electronic device in series and used for controlling the on-off of the alternating current power supply and the electronic device according to the state change of the flash switch.
Optionally, the control system further comprises: the display module is connected with the output end of the electronic device and is used for carrying out corresponding visual display on the level signal output by the low-power consumption detection circuit; the visual display is used for indicating that the detection result is correspondingly output according to the level signal, for example, the detection output is correspondingly displayed to be low level when the phototriode is in a conducting state; and displaying that the detection output is high level when the phototriode is in an off state.
In the embodiment of the utility model, the current-limiting resistor, the isolation optocoupler and the control circuit are arranged in the circuit board; the current limiting resistor is connected with the isolation optocoupler in series and used for limiting a second current input by an alternating current power supply into a first current; the isolation optocoupler is used for comparing the first current input at the input end of the isolation optocoupler with a preset working current corresponding to the isolation optocoupler and outputting a level signal according to a comparison result; the control circuit is connected with the output end of the isolation optocoupler in series and used for detecting whether the alternating current power supply is in flash break or not through the level signal. The flash condition that appears to alternating current power supply through the flash state detection circuit carries out real-time accurate flash detection promptly, and above-mentioned flash state detection circuit's circuit structure is simple, and components and parts are with low costs, and the flash detection degree of accuracy is high. Adopt above-mentioned technical scheme, solved the correlation technique, the cost that the flash detected is higher, and the degree of accuracy low grade problem, through the embodiment of the utility model provides a can realize reducing the emergence of the flash detection inefficacy condition to the degree of accuracy that the flash detected of isolated circuit.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:
fig. 1 is a block diagram of a flash status detection circuit according to an embodiment of the present invention;
fig. 2 is a block diagram of another embodiment of the present invention;
FIG. 3 is an operational diagram of a related art flash detection circuit;
FIG. 4 is a schematic diagram of a related art glitch detection circuit;
fig. 5 is a schematic circuit diagram of an isolated glitch detection circuit according to an alternative embodiment of the present invention;
fig. 6 is a schematic waveform diagram of an isolated glitch detection circuit according to an alternative embodiment of the present invention;
fig. 7 is a schematic waveform diagram of an isolated glitch detection circuit according to an alternative embodiment of the present invention;
fig. 8 is a block diagram of an electronic device according to an embodiment of the invention;
fig. 9 is a block diagram of a control system of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiment of the application provides a flash state detection circuit. Fig. 1 is a block diagram of a flash status detection circuit according to an embodiment of the present invention. The circuit comprises the following: the circuit comprises a current limiting resistor 10, an isolation optocoupler 12 and a control circuit 14;
the current limiting resistor 10 is connected in series with the isolation optocoupler 12 and is used for limiting a second current input by an alternating current power supply into a first current;
optionally, the ac power supply is any power supply capable of providing ac power for an electrical appliance, and includes a mains supply, an uninterruptible power supply, an ac regulated power supply and accessories thereof, where the accessories are switches, sockets, and the like, and the application is not limited to this.
The isolating optocoupler 12 is used for comparing a first current input at the input end of the isolating optocoupler with a preset working current corresponding to the isolating optocoupler and outputting a level signal according to a comparison result;
the control circuit 14 is connected in series with the output end of the isolation optocoupler 12 and used for detecting whether the alternating current power supply is in flash-off state or not through the level signal.
The flash state detection circuit comprises a current-limiting resistor, an isolation optocoupler and a control circuit; the current limiting resistor is connected with the isolation optocoupler in series and used for limiting a second current input by an alternating current power supply into a first current; the isolation optocoupler is used for comparing the first current input at the input end of the isolation optocoupler with a preset working current corresponding to the isolation optocoupler and outputting a level signal according to a comparison result; the control circuit is connected with the output end of the isolation optocoupler in series and used for detecting whether the alternating current power supply is in flash break or not through the level signal. The flash condition that appears to alternating current power supply through the flash state detection circuit carries out real-time accurate flash detection promptly, and above-mentioned flash state detection circuit's circuit structure is simple, and components and parts are with low costs, and the flash detection degree of accuracy is high. Adopt above-mentioned technical scheme, solved the correlation technique, the cost that the flash detected is higher, and the degree of accuracy low grade problem, through the embodiment of the utility model provides a can realize reducing the emergence of the flash detection inefficacy condition to the degree of accuracy that the flash detected of isolated circuit.
Fig. 2 is a block diagram of another embodiment of the present invention.
Optionally, the flash status detection circuit further includes: a reverse protection diode 25; the reverse protection diode is respectively connected with the alternating current power supply and the input end of the isolation optocoupler 12 in parallel and is used for conducting when the alternating current waveform corresponding to the alternating current power supply is in a negative half shaft; and then, the phenomenon that the isolation optocoupler is broken down due to the fact that excessive voltage is added to the isolation optocoupler is avoided.
Briefly, protect the isolation opto-coupler through above-mentioned reverse protection diode, after the voltage of loading at the input of isolation opto-coupler is greater than the corresponding turn-on voltage of reverse protection diode, the reverse protection diode between zero line branch road and the live wire branch road switches on, and at this moment, alternating current power supply's live wire branch road and zero line branch road lug connection for emitting diode avoids bearing too big reverse voltage.
For example, when the alternating current corresponding to the alternating current power supply is in the negative half shaft, the alternating current flows through the reverse protection diode D1, and the tube voltage drop of the reverse protection diode D1 is smaller than the conduction voltage U0; and the maximum reverse voltage U2 borne by the light emitting diode in the isolation optocoupler is far greater than U0, so that the protection effect is achieved.
Optionally, the current limiting resistor 10 includes: a first current limiting resistor 2302 and a second current limiting resistor 2304 having the same resistance value as the first current limiting resistor; the first current-limiting resistor is arranged on a live wire branch corresponding to the alternating current power supply; and the second current-limiting resistor is arranged on the zero line branch corresponding to the alternating current power supply.
It is required to explain, above-mentioned flash switch, current-limiting resistor, isolation opto-coupler are for can being used to realize the utility model discloses the original paper of the same kind of an arbitrary model of functional requirement, the model of above-mentioned flash switch, current-limiting resistor, isolation opto-coupler is selected for according to the actual production needs, can carry out nimble adjustment according to the practical application of flash state detection circuitry, the utility model discloses do not too much to this and prescribe a limit to.
Optionally, the flash switch may be a self-rebounding switch or a self-resetting switch; the connection of the alternating current power supply in the circuit is controlled through the upper flash switch. The flash switch is closed in a normal state, and when the alternating current power supply is abnormal or the flash switch is acted by external force, the input of the target power supply to the flash state detection circuit is actively disconnected, so that the alternating current is disconnected (namely, flash).
For example, when the flash switch is a self-rebounding switch, the switch is in a constantly closed state under the condition that external force is not received, the alternating-current power supply and the flash state detection circuit are in a connected state, a light-emitting diode of the isolation optocoupler in the flash state detection circuit works, a triode in the optocoupler is in a conducting state, and the output result of the output end is a continuous low level; when an external force presses the switch, the switch is always in a closed state and is disconnected, the alternating current power supply and the flash state detection circuit are in a disconnected state, a light emitting diode of an isolation optocoupler in the flash state detection circuit does not work, a triode in the optocoupler is in a disconnected state, and the output result of an output end is a continuous high level; the self-rebounding switch can restore the previous closed state within a preset time, so that the alternating current power supply and the flash state detection circuit can restore the connection state, and the occurrence of the disconnected state of the self-rebounding switch indicates that the alternating current power supply has the flash condition in the circuit.
Optionally, the isolating optocoupler 12 includes: a light emitting diode 1202; the light emitting diode is used for emitting light after the second current input by the input end of the isolation optocoupler is greater than or equal to a preset working current, and the preset working current is the lowest current of the light emitting diode entering a light emitting state.
It should be noted that, the directions of the positive pole and the negative pole of the light emitting diode in the optical coupler determine the direction of the backward diode in the circuit, and after the directions of the positive pole and the negative pole of the light emitting diode in the optical coupler are determined, the directions of the positive pole and the negative pole of the backward diode which has a parallel connection relation with the optical coupler are opposite to the directions of the positive pole and the negative pole of the light emitting diode.
Optionally, the isolation optocoupler further includes: a photo transistor 1204; the phototriode is used for entering a conducting state under the condition that the base electrode of the phototriode receives light rays emitted by the light emitting diode, and outputting a preset low level of the phototriode in the conducting state; or after the light emitting diode is determined not to be in the light emitting state, the light emitting diode enters a cut-off state, and the preset high level of the phototriode in the cut-off state is output.
Optionally, the isolation optocoupler further includes: a third resistor and a first capacitor; the third resistor is connected with the collector of the phototriode and used for dividing the preset voltage loaded on the collector to obtain a third voltage loaded on the collector of the phototriode; the first capacitor is connected with the phototriode in parallel and used for providing fourth voltage for the phototriode.
The third voltage is greater than the fourth voltage.
For example, the work flow of the isolation optocoupler is as follows:
when the forward second current of the light emitting diode in the isolation optocoupler is larger than the preset working current, the output phototriode in the isolation optocoupler is in saturated conduction, the fourth voltage output by the collector electrode of the isolation optocoupler is close to zero potential, when the second current passes through the backward diode, the light emitting diode in the isolation optocoupler can not pass through the current, the output phototriode in the isolation optocoupler is cut off, the output voltage of the collector electrode of the phototriode is the third voltage, the voltage of the collector electrode of the phototriode jumps in high and low levels along with one period of alternating current (namely commercial power), and the jumping signal indicates that the alternating current power supply has a sudden change.
Optionally, the control circuit 14 at least comprises: a processor 1402, a driver circuit 1404; the processor is used for determining that the alternating current power supply is flashed when the duration time corresponding to the high level in the level signal output by the flash state detection circuit is longer than preset time, generating a driving signal corresponding to the flash, and sending the driving signal to the driving circuit in a preset communication mode; the level signal includes: a high level and a low level; the driving circuit is connected with the processor in series and used for controlling a load connected with the driving circuit in series according to a driving signal sent by the processor
In order to better understand the principle of the above-mentioned flash state detection circuit, the following describes the implementation of the above-mentioned flash state detection circuit with reference to an optional embodiment, but the invention is not limited to the technical solution of the embodiment of the present invention.
Fig. 3 is an operation diagram of a related art flash detection circuit, which controls an operation state of a consumer by detecting that a flash switch emits a flash signal by a power failure detection circuit. Wherein, press the disconnection and the external power source 4 is pressed when the flash switch 1 receives external force for external power source 4 and power consumption load 5 intercommunication interrupt, and at this moment, outage detection circuitry 2 carries out the flash detection to current circuit, and with the testing result synchronous to controller 3, controls the operating condition of consumer (promptly with power consumption load 5) through the controller.
FIG. 4 is a schematic diagram of a related art glitch detection circuit; the flash detection circuit includes: zero-crossing comparison module and output resistor R 0 The circuit structure is complex, and the cost of components is high, so that the cost of application is limited, and the application range is limited;
in order to reduce the cost of components, the utility model provides a new isolated flash detection circuit, fig. 5 is a circuit schematic diagram of the isolated flash detection circuit of the optional embodiment of the utility model;
specifically, the practical application of the isolated flash detection circuit may include: flash switch S1, first current-limiting resistor R1, second current-limiting resistor R2, reverse protection diode D1 and isolation optocoupler U 1 (ii) a It should be noted that the above is only an example of a circuit, and the circuit of the present application is not limited theretoAnd (4) determining.
Optionally, fig. 6 is a schematic waveform diagram of the isolated flash detection circuit according to an alternative embodiment of the present invention, where no flash occurs; wherein, the I waveform is: the novel isolated flash detection circuit corresponds to the alternating current waveform of the input end; the waveform II is: when the flash break does not occur, the waveform output by the new isolated flash break detection circuit is used; it should be noted that the flash switch (corresponding to the flash switch of the above-described embodiment) in fig. 6 is normally closed, and therefore, the new isolated type flash detection circuit (i.e., the detection circuit) can detect a rectangular wave signal having the same frequency as the alternating current.
Optionally, fig. 7 is a schematic waveform diagram illustrating an isolated flash detection circuit according to an alternative embodiment of the present invention; when the flash switch in the new isolated flash detection circuit is pressed, the detection circuit will detect the disconnection of the alternating current, and the output waveform is shown in fig. 7, wherein the I waveform is: when the circuit is in a flash-off state, the novel isolated flash-off detection circuit corresponds to the waveform of the alternating current at the input end, the transverse line part is a period in which the flash-off occurs, the alternating current power supply is disconnected with the novel isolated flash-off detection circuit in the period, and no input voltage exists; the waveform II is: when the flash break occurs, the waveform is output through a new isolated flash break detection circuit; furthermore, the controller can judge that the circuit is abnormal according to the rectangular wave signal output by the isolated flash detection circuit, so that the controller can judge that a flash switch action occurs.
Optionally, after the controller determines that one of the flash switches is actuated, the controller outputs a driving signal to the electric load to reverse the state of the electric load; for example: under the condition that the electric load in the circuit is a lamp, the lamp before the switch action in the alternating current power supply is on, the flash-off operation after the switch action is determined by the flash-off detection circuit and outputs a corresponding oscillogram, then the controller outputs a driving signal for controlling the electric load according to the obtained oscillogram, the driving circuit controls the display of the lamp according to the driving signal, and when the lamp is on before the flash-off operation, the lamp can be turned off from the on state after the flash-off operation occurs; vice versa, when the lamp is turned off before the switch is operated, the lamp is turned on from off when the switch is operated to flash off.
As an alternative embodiment, the working principle corresponding to fig. 5 is now described in detail, when the positive half-axis period of the ac power is started, the ac power passes through R1 and U1 to isolate the light emitting diode of the optocoupler from R2, and when the current exceeds the working current of U1, U1 operates, the light emitting diode in the optocoupler operates, the triode in the optocoupler is in a conducting state, and the "agile detection output" is at a low level at this time; when the current flowing through a light emitting diode in the optocoupler is smaller than the working current, the optocoupler is in a turn-off state (namely a phototriode in the optocoupler is in a cut-off state), the triode in the optocoupler is in a turn-off state at the moment, and the flexible detection output is at a high level at the moment;
optionally, the state of the load is controlled by a level signal continuously output by the new isolated flash detection circuit, including: when the time interval of the high level or the low level in the level signal is less than TO, the flash switch is considered not TO act; when the time interval of the high level or the low level is larger than or equal TO TO, the flash switch is considered TO act; when the flash switch acts, the state of the corresponding lamp can be reversed;
optionally, D1 in fig. 5 plays a role in protecting the isolation optocoupler; namely: when the alternating current is at a negative half shaft, the alternating current flows through D1, and the tube voltage drop of D1 is smaller than U0; and the maximum reverse voltage U2 borne by the light emitting diode of the optical coupler is far greater than U0, so that the protection effect is achieved.
Through above-mentioned embodiment, through new isolated form flash detection circuit, and above-mentioned flash state detection circuit's circuit structure is simple, and components and parts are with low costs, and the flash detection degree of accuracy is high. Adopt above-mentioned technical scheme, solved the correlation technique, the cost that the flash detected is higher, and the degree of accuracy low grade problem, through the embodiment of the utility model provides a can realize reducing the emergence of the flash detection inefficacy condition to the degree of accuracy that the flash detected of isolated circuit.
Fig. 8 is a block diagram of an electronic device according to an embodiment of the invention; as shown in fig. 8, includes: a flash state detection circuit 72; further comprising: a load unit 76 and a load control unit 74, wherein the load control unit controls the load unit flash switch according to a signal corresponding to the detected flash state in the circuit. It should be noted that the load unit includes, but is not limited to, a motor, an LED, and the electronic device includes, but is not limited to, a lamp, a fan, a bathroom heater, and the like.
Optionally, the flash status detection circuit 72 includes: the current limiting resistor, the isolation optocoupler and the control circuit are connected in series; the current limiting resistor is connected with the isolation optocoupler in series and used for limiting a second current input by an alternating current power supply into a first current; the isolation optocoupler is used for comparing the first current input at the input end of the isolation optocoupler with a preset working current corresponding to the isolation optocoupler and outputting a level signal according to a comparison result; the control circuit is connected with the output end of the isolation optocoupler in series and used for detecting whether the alternating current power supply is in flash break or not through the level signal.
Optionally, an input end of the above-mentioned flash state detection circuit is connected to an output end of a flash switch, wherein an input end of the flash switch is connected to an ac power supply, and the flash switch is a self-rebounding switch.
Optionally, the current limiting resistor includes: the current limiting circuit comprises a first current limiting resistor and a second current limiting resistor, wherein the resistance value of the first current limiting resistor is the same as that of the second current limiting resistor; the first current-limiting resistor is arranged on a live wire branch corresponding to the alternating current power supply; and the second current-limiting resistor is arranged on the zero line branch corresponding to the alternating current power supply.
Optionally, the flash status detection circuit further includes: a reverse protection diode; the reverse protection diode is connected with the input ends of the alternating current power supply and the isolation optocoupler in parallel respectively and used for conducting when an alternating current waveform corresponding to the alternating current power supply is in a negative half shaft.
Optionally, the isolation optocoupler includes: a light emitting diode; the light emitting diode is used for emitting light after the second current input by the input end of the isolation optocoupler is greater than or equal to a preset working current, and the preset working current is the lowest current of the light emitting diode entering a light emitting state.
Optionally, the isolation optocoupler further includes: a photo transistor; the phototriode is used for entering a conducting state under the condition that the base electrode of the phototriode receives light rays emitted by the light emitting diode, and outputting a preset low level of the phototriode in the conducting state; or after the light emitting diode is determined not to be in the light emitting state, the light emitting diode enters a cut-off state, and the preset high level of the phototriode in the cut-off state is output.
Optionally, the isolation optocoupler further includes: a third resistor and a first capacitor; the third resistor is connected with the collector of the phototriode and used for dividing the preset voltage loaded on the collector to obtain a third voltage loaded on the collector of the phototriode; the first capacitor is connected with the phototriode in parallel and used for providing fourth voltage for the phototriode.
Optionally, the control circuit at least includes: the processor is used for determining that the alternating current power supply is in a flash state under the condition that the duration time corresponding to the high level in the level signal output by the flash state detection circuit is longer than the preset time, generating a driving signal corresponding to the flash state, and sending the driving signal to the driving circuit in a preset communication mode; the level signal includes: a high level and a low level; the driving circuit is connected with the processor in series and used for controlling a load connected with the driving circuit in series according to a driving signal sent by the processor.
Optionally, the control circuit further comprises: the communication circuit is connected with the processor in series and used for establishing a communication channel between the driving circuit and the processor according to a preset communication mode so as to send a driving signal existing in the processor to the driving circuit through the communication channel.
Fig. 9 is a block diagram of a control system of an electronic device according to an embodiment of the present invention; as shown in fig. 9, the electronic device includes: and the input end of the flash switch is connected with an alternating current power supply in series, and the output end of the flash switch is connected with the electronic device in series, and the flash switch is used for controlling the on-off of the alternating current power supply and the electronic device according to the state change of the flash switch.
Optionally, an input end of the flash switch is connected in series with an ac power supply, and an output end of the flash switch is connected in series with the flash state detection circuit, and is configured to control on/off of the ac power supply and the flash state detection circuit according to a state change of the flash switch.
Optionally, the control system further includes: the display module is connected with the output end of the flash state detection circuit and is used for carrying out corresponding visual display on the level signal output by the flash state detection circuit; the visual display is used for indicating that a detection result is correspondingly output according to the level signal, for example, the detection output is correspondingly displayed to be a low level when the phototriode is in a conducting state; and displaying that the detection output is high level when the phototriode is in an off state.
The embodiment of the utility model provides an in, above-mentioned control system carries out real-time detection through the flash condition that low-power consumption detection circuitry appears to alternating current power supply, and above-mentioned low-power consumption detection circuitry's circuit structure is simple, and components and parts are with low costs, and the flash detection degree of accuracy is high, and in addition, make low-power consumption detection circuitry be normal work at alternating current waveform in the burden semi-axis through quoting power consumption circuit, when alternating current waveform is in the burden semi-axis, utilize power consumption circuit to enlarge the impedance in the low-power consumption detection circuitry to the consumption reduction of control burden semi-axis. Adopt above-mentioned technical scheme, solved the higher and higher low grade problem of consumption of cost of detection circuitry among the correlation technique, through the embodiment of the utility model provides a can realize reducing the emergence of the flash detection inefficacy condition, reduce the total consumption of whole detection to the degree of accuracy that the flash detected of circuit.
The embodiment of the utility model provides an in, above-mentioned electron device carries out real-time accurate flash detection through the flash condition that flash state detection circuitry appears alternating current power supply, and above-mentioned flash state detection circuitry's circuit structure is simple, and components and parts are with low costs, and the flash detection accuracy is high. Adopt above-mentioned technical scheme, solved the correlation technique, the cost that the flash detected is higher, and the degree of accuracy low grade problem, through the embodiment of the utility model provides a can realize reducing the emergence of the flash detection inefficacy condition to the degree of accuracy that the flash detected of isolated circuit.
Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and optionally they may be implemented by program code executable by a computing device, such that they may be stored in a memory device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that shown or described herein, or separately fabricated as individual integrated circuit modules, or multiple ones of them fabricated as a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A flash state detection circuit, comprising: the current limiting resistor, the isolation optocoupler and the control circuit are connected in series;
the current limiting resistor is connected with the isolation optocoupler in series and is used for limiting a second current input by an alternating current power supply into a first current;
the isolation optocoupler is used for comparing the first current input at the input end of the isolation optocoupler with a preset working current corresponding to the isolation optocoupler and outputting a level signal according to a comparison result;
the control circuit is connected with the output end of the isolation optocoupler in series and used for detecting whether the alternating current power supply is in flash break or not through the level signal.
2. The flash status detection circuit according to claim 1, wherein an input terminal of the flash status detection circuit is connected to an output terminal of a flash switch, wherein an input terminal of the flash switch is connected to an ac power source, and the flash switch is a self-rebounding switch.
3. The flash state detection circuit of claim 1, wherein the current limiting resistor comprises: the current limiting circuit comprises a first current limiting resistor and a second current limiting resistor, wherein the resistance value of the first current limiting resistor is the same as that of the second current limiting resistor;
the first current-limiting resistor is arranged on a live wire branch corresponding to the alternating current power supply; and the second current-limiting resistor is arranged on the zero line branch corresponding to the alternating current power supply.
4. The flash state detection circuit of claim 1, further comprising: a reverse protection diode;
the reverse protection diode is connected with the input ends of the alternating current power supply and the isolation optocoupler in parallel respectively and used for conducting when an alternating current waveform corresponding to the alternating current power supply is in a negative half shaft.
5. The flash state detection circuit of claim 1, wherein the isolation optocoupler comprises: a light emitting diode;
the light emitting diode is used for emitting light after the second current input by the input end of the isolation optocoupler is greater than or equal to a preset working current, and the preset working current is the lowest current of the light emitting diode entering a light emitting state.
6. The flash state detection circuit of claim 5, wherein the isolation optocoupler further comprises: a photo transistor;
the phototriode is used for entering a conducting state under the condition that the base electrode of the phototriode receives light rays emitted by the light emitting diode, and outputting a preset low level of the phototriode in the conducting state; or after the light emitting diode is determined not to be in the light emitting state, the light emitting diode enters a cut-off state, and the preset high level of the phototriode in the cut-off state is output.
7. The glitch detection circuit of claim 6, wherein the isolation optocoupler further comprises: a third resistor and a first capacitor;
the third resistor is connected with the collector of the phototriode and used for dividing the preset voltage loaded on the collector to obtain a third voltage loaded on the collector of the phototriode;
the first capacitor is connected with the phototriode in parallel and used for providing fourth voltage for the phototriode.
8. The flash state detection circuit of claim 1, wherein the control circuit comprises at least: a processor, a drive circuit;
the processor is used for determining that the alternating current power supply is flashed when the duration time corresponding to the high level in the level signal output by the flash state detection circuit is longer than the preset time, generating a driving signal corresponding to the flash, and sending the driving signal to the driving circuit in a preset communication mode; the level signal includes: a high level and a low level;
the driving circuit is connected with the processor in series and used for controlling a load connected with the driving circuit in series according to a driving signal sent by the processor.
9. An electronic device comprising the flash status detection circuit of any one of claims 1 to 8.
10. The electronic device of claim 9, further comprising: the load control unit controls the load unit according to a signal corresponding to the detected flash-off state in the circuit.
11. A control system of an electronic device, characterized by comprising the electronic device of any one of claims 9 to 10.
12. The control system of claim 11, further comprising: the input end of the flash switch is connected with an alternating current power supply in series, and the output end of the flash switch is connected with the electronic device in series and used for controlling the on-off of the alternating current power supply and the electronic device according to the state change of the flash switch.
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| CN202221822769.8U CN218003674U (en) | 2022-07-15 | 2022-07-15 | Flash-off state detection circuit and electronic device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115877200A (en) * | 2023-02-21 | 2023-03-31 | 中电装备山东电子有限公司 | Broken wire detection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115877200A (en) * | 2023-02-21 | 2023-03-31 | 中电装备山东电子有限公司 | Broken wire detection system |
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