CN107197573B - Inductive switch control device - Google Patents
Inductive switch control device Download PDFInfo
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- CN107197573B CN107197573B CN201710401306.1A CN201710401306A CN107197573B CN 107197573 B CN107197573 B CN 107197573B CN 201710401306 A CN201710401306 A CN 201710401306A CN 107197573 B CN107197573 B CN 107197573B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/105—Controlling the light source in response to determined parameters
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Abstract
The invention provides an inductive switch control device, which comprises a main control chip, a switch circuit, a relay driving circuit, an inductive circuit and a power supply module, wherein the switch circuit comprises a double-control switch S1, a double-throw switch S2 and a relay K1, the power supply module is connected with an external power supply through the switch circuit, the relay driving circuit comprises a first driving sub-circuit and a second driving sub-circuit, a signal input pin of the main control chip is connected with an output end of the inductive circuit, and when the duration of continuously not receiving an infrared induction signal is longer than a preset threshold value, the main control chip sequentially controls the first driving sub-circuit and the second driving sub-circuit to be conducted, so that a first coil K1B and a second coil K1C of the relay are sequentially electrified and are disconnected with the external power supply, and thus, the automatic load closing, such as the switching off of a lamp, is realized. The induction switch control device can enable the lamp to achieve a human body induction function and a double control function at the same time, and control of the lamp is more intelligent and humanized.
Description
Technical Field
The invention relates to the technical field of electrical control, in particular to an inductive switch control device.
Background
The human body induction lighting lamp is a novel lighting product which utilizes the infrared pyroelectric principle to induce human body activity information and further controls the lamp switch.
The general human body induction illuminating lamp controls the lamp to be turned on through a human body induction switch. Specifically, when someone enters the sensing range, the human body sensing switch is closed, so that the lamp is turned on. However, after the lamp is turned on, the traditional human body induction switch cannot be automatically turned off, and the double control function cannot be realized, so that the lamp is always lighted, and energy waste is caused. If the human body induction switch is connected with the double-control switch in series to realize the control of the lamp, the human body induction switch cannot be automatically opened when the double-control switch is closed, the double-control switch is required to be manually closed to close the lamp, and the human body induction function of the lamp is disabled after the double-control switch is opened.
Disclosure of Invention
In view of the foregoing, it is necessary to provide an induction switch control device, which can enable a lamp to achieve a human body induction function and a double control function at the same time, so that the control of the lamp is more intelligent and humanized.
The invention discloses an inductive switch control device, which comprises a main control chip, a switch circuit, a relay driving circuit, an inductive circuit and a power supply module, wherein:
the switching circuit comprises a double-control switch S1, a double-throw switch S2 and a relay K1, wherein a static contact of a switch K1A of the relay K1 is connected with a static contact of the double-control switch S1, a movable contact of the switch K1A is connected with a static contact of the double-throw switch S2, a static contact of the double-throw switch S2 is connected with a first input end of the power supply module, the double-control switch S1 is used for connecting a load and an external power supply, and a live wire terminal of the double-control switch S1 is connected with a second input end of the power supply module;
the power supply module comprises a first voltage output end and a second voltage output end, and the first voltage output end is respectively connected with the power supply end of the main control chip and the power supply end of the induction circuit;
the relay driving circuit comprises a first driving sub-circuit and a second driving sub-circuit, the first driving sub-circuit is respectively connected with the second voltage output end, the first output end of the main control chip and the first coil K1B of the relay K1, and the second driving sub-circuit is respectively connected with the second voltage output end, the second output end of the main control chip and the second coil K1C of the relay K1;
the signal input pin of the main control chip is connected with the output end of the induction circuit, and the main control chip is used for outputting control signals through the first output end and the second output end in sequence when the duration of continuously not receiving the infrared induction signals is longer than a preset threshold value.
In one embodiment, the first driving sub-circuit includes a resistor R1, a resistor R7, and a first switching tube unit; one end of the resistor R7 is connected with the first output end of the main control chip, the other end of the resistor R7 is connected with the first end of the first switching tube unit, the other end of the resistor R7 is grounded through the resistor R1, the second end of the first switching tube unit is grounded through the first coil of the relay K1, and the third end of the first switching tube unit is connected with the second voltage output end of the power supply module.
In one embodiment, the first switching tube unit includes a triode Q1, a resistor R33 and a triode Q4; the base of triode Q1 is connected the other end of resistance R7, triode Q1's projecting pole is used for ground connection, triode Q1's collecting electrode passes through resistance R33 connects triode Q4's base, triode Q4's projecting pole is connected power module's second voltage output, triode Q4's collecting electrode passes through relay K1's first coil ground connection.
In one embodiment, the second driving sub-circuit includes a resistor R11, a resistor R17, and a second switching tube unit; one end of the resistor R11 is connected with the second output end of the main control chip, the other end of the resistor R11 is connected with the first end of the second switching tube unit, the other end of the resistor R11 is grounded through the resistor R17, the second end of the second switching tube unit is grounded through the second coil of the relay K1, and the third end of the second switching tube unit is connected with the second voltage output end of the power supply module.
In one embodiment, the second switching tube unit includes a triode Q2, a resistor R32 and a triode Q3; the base of triode Q2 is connected the other end of resistance R11, triode Q2's projecting pole is used for ground connection, triode Q2's collecting electrode passes through resistance R32 connects triode Q3's base, triode Q3's projecting pole is connected power module's second voltage output, triode Q3's collecting electrode passes through relay K1's second coil ground connection.
In one embodiment, the double-control switch S1 includes a live wire terminal L, a movable contact L1, a stationary contact A1 and a stationary contact A2, and the switch K1A of the relay K1 includes two movable contacts and first to fourth stationary contacts; the live wire terminal L is connected with a second input end of the power supply module, the live wire terminal L is also used for connecting a live wire, the movable contact L1 is used for connecting a zero line through a load, the fixed contact A1 is respectively connected with a first fixed contact of the switch K1A and a fourth fixed contact of the switch K1A, the fixed contact A2 is respectively connected with a second fixed contact of the switch K1A and a third fixed contact of the switch K1A, and two movable contacts of the switch K1A are respectively connected with two fixed contacts of the double-throw switch;
when the first coil of the relay K1 is electrified, two movable contacts of the switch K1A are respectively connected with a first fixed contact of the switch K1A and a third fixed contact of the switch K1A; when the second coil of the relay K1 is electrified, two movable contacts of the switch K1A are respectively connected with the second fixed contact of the switch K1A and the fourth fixed contact of the switch K1A.
In one embodiment, the sensing circuit includes a signal processing chip and an infrared sensor, a first input pin of the signal processing chip is connected to a signal output end of the infrared sensor, and a first output pin of the signal processing chip is connected to a first signal input pin of the main control chip.
In one embodiment, the sensing circuit further includes a photosensitive element and a resistor R14, one end of the photosensitive element is connected to the second input pin of the signal processing chip, one end of the photosensitive element is grounded through the resistor R14, the other end of the photosensitive resistor is connected to the second input pin of the signal processing chip, and the second output pin of the signal processing chip is connected to the second signal input pin of the main control chip.
In one embodiment, the sensing circuit further includes a photosensitive adjusting switch SW1, a resistor R39 and a resistor R13, the movable contact of the photosensitive adjusting switch SW1 is connected to the second voltage output end, the first stationary contact of the photosensitive adjusting switch is connected to the second input pin of the signal processing chip through the resistor R39 and the resistor R13 which are connected in series, and the second stationary contact of the photosensitive adjusting switch is connected to the connection node of the resistor R39 and the resistor R13.
In one embodiment, the inductive switch control device further includes a zero-crossing detection circuit, a first input end of the zero-crossing detection circuit is connected to the first voltage output end, a second input end of the zero-crossing detection circuit is connected to the second voltage output end, and an output end of the zero-crossing detection circuit is connected to a third signal input end of the main control chip.
According to the induction switch control device, infrared human body induction detection can be performed during the working period of a load, for example, during the turning-on period of a lamp, when human body infrared signals are not continuously detected within the preset time, automatic power-off can be controlled, so that the load stops working, and therefore automatic turning-off of the load, for example, turning-off of the lamp, is achieved, and unnecessary energy waste is avoided. The induction switch control device can enable the lamp to achieve a human body induction function and a double control function at the same time, and control of the lamp is more intelligent and humanized.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other embodiments of the drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic circuit diagram of an embodiment of an inductive switch control device;
FIG. 2 is a schematic circuit diagram of a first driving sub-circuit in an inductive switch control device according to an embodiment;
FIG. 3 is a circuit diagram of a first driving sub-circuit in an inductive switch control device according to an embodiment;
FIG. 4 is a schematic circuit diagram of a second driving sub-circuit in the inductive switch control device according to an embodiment;
FIG. 5 is a circuit diagram of a second driving sub-circuit in the inductive switch control device according to another embodiment;
FIG. 6 is a circuit diagram of a sensing circuit in a sensing switch control device according to an embodiment;
FIG. 7 is a partial circuit diagram of an inductive switch control device according to an embodiment;
fig. 8 is a circuit diagram of a main control chip in an inductive switch control device according to an embodiment.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
An induction switch control device according to an embodiment of the present invention is described below with reference to the accompanying drawings. For example, the inductive switch control device according to an embodiment of the present invention includes a main control chip, a switch circuit, a relay driving circuit, an inductive circuit and a power module, where the switch circuit includes a double-control switch S1, a double-throw switch S2 and a relay K1, a stationary contact of a switch K1A of the relay K1 is connected to a stationary contact of the double-control switch S1, a movable contact of the switch K1A is connected to a stationary contact of the double-throw switch S2, a stationary contact of the double-throw switch S2 is connected to a first input end of the power module, the double-control switch S1 is used to connect a load and an external power source, and a live wire terminal of the double-control switch S1 is connected to a second input end of the power module; the power supply module comprises a first voltage output end and a second voltage output end, and the first voltage output end is respectively connected with the power supply end of the main control chip and the power supply end of the induction circuit; the relay driving circuit comprises a first driving sub-circuit and a second driving sub-circuit, the first driving sub-circuit is respectively connected with the second voltage output end, the first output end of the main control chip and the first coil K1B of the relay K1, and the second driving sub-circuit is respectively connected with the second voltage output end, the second output end of the main control chip and the second coil K1C of the relay K1; the signal input pin of the main control chip is connected with the output end of the induction circuit, and the main control chip is used for outputting control signals through the first output end and the second output end in sequence when the duration of continuously not receiving the infrared induction signals is longer than a preset threshold value.
It should be noted that, what is claimed in the present invention is the product structure and the connection relation of the inductive switch control device in the above and following embodiments, and specific signal transmission and control are implemented by electronic components, and the scope of the present invention does not relate to specific transmission and control of signals, and specific structure and connection relation descriptions are given below for a specific main control chip, a switch circuit, a relay driving circuit, an inductive circuit and a power module.
For example, fig. 1 is a schematic circuit diagram of an inductive switch control device according to an embodiment. As shown in fig. 1, the inductive switch control device 10 includes a main control chip 110, a switch circuit 120, a relay driving circuit 130, an inductive circuit 140 and a power module 150.
The switch circuit 120 includes a double-control switch S1, a double-throw switch S2, and a relay K1, a stationary contact of a switch K1A of the relay K1 is connected to the stationary contact of the double-control switch S1, a movable contact of the relay switch K1A is connected to the stationary contact of the double-throw switch S2, the stationary contact of the double-throw switch S2 is connected to a first input end of the power module, the double-control switch S1 is used for connecting a load and an external power supply, and a live wire terminal L of the double-control switch S1 is connected to a second input end of the power module.
The power module 150 includes a first voltage output end and a second voltage output end, where the first voltage output end is connected to the power end of the main control chip and the power end of the induction circuit, respectively. The first voltage output end is used for supplying power to the main control chip and the induction circuit, and the second voltage output end is used for supplying power to the relay driving circuit 130. Specifically, the first voltage output end outputs VDD voltage to supply power to the main control chip and the sensing circuit, and the second voltage output end outputs VCC voltage to supply power to the relay driving circuit.
The relay driving circuit 130 includes a first driving sub-circuit and a second driving sub-circuit, the first driving sub-circuit is respectively connected to the second voltage output end, the first output end of the main control chip and the first coil K1B of the relay K1, and the second driving sub-circuit is respectively connected to the second voltage output end, the second output end of the main control chip and the second coil K1C of the relay K1. Specifically, the relay switch K1A includes two pairs of stationary contacts, and a pair of movable contacts of the relay switch K1A are closed with the two pairs of stationary contacts when currents are formed in the first coil K1B and the second coil K1C of the relay, respectively. For example, the two pairs of stationary contacts are a first pair of stationary contacts and a second pair of stationary contacts, and when a current is formed in the first coil K1B, a pair of movable contacts of the relay switch K1A is closed with the first pair of stationary contacts; when a current is formed in the second coil K1C, a pair of moving contacts of the relay switch K1A is closed with a second pair of stationary contacts.
The signal input pin of the main control chip 110 is connected to the output end of the sensing circuit, and the main control chip 110 is configured to sequentially output a control signal through the first output end and the second output end when the duration of continuously not receiving the infrared sensing signal is greater than a preset threshold value. For example, the main control chip 110 may be implemented by a single chip microcomputer.
In practical application, the sensing circuit 140 includes an infrared pyroelectric sensor for sensing infrared signals radiated by a human body and transmitting the infrared sensing signals to the main control chip 110. During the power-on period of the above-mentioned inductive switch control device, i.e. during the load operation period, the main control chip 110 records the duration of continuous non-receiving of the infrared induction signal through a timer, i.e. records the duration of interruption of the infrared induction signal. When the time period is longer than the preset threshold value, the first output end of the main control chip 110 outputs a control signal Out1, and the control signal enables the first driving sub-circuit in the relay driving circuit 130 to be conducted, so that current is generated in the first coil K1B of the relay K1, and a pair of movable contacts and a pair of static contacts of the relay switch K1A are closed. Under the condition, if the power module is connected with the external power supply and the load after the pair of movable contacts and the first pair of stationary contacts of the relay switch K1A are closed, the second output end of the main control chip 110 outputs a control signal Out2 to enable the second driving sub-circuit in the relay driving circuit 130 to be turned on, so that the pair of movable contacts and the second pair of stationary contacts of the relay switch K1A are closed, and the connection between the power module and the external power supply and the connection between the power module and the load are disconnected, and the load stops working. Under another condition, if the power module is disconnected from the external power source and the load after the pair of movable contacts and the first pair of stationary contacts of the relay switch K1A are closed, the load directly stops working, and it can be understood that the main control chip does not output a control signal through the second output end any more due to power interruption. The control signal output by the first output end or the second output end of the main control chip 110 is a preset level signal, for example, a high level signal or a low level signal.
Wherein the load is a lighting load, for example, the load is a lighting fixture. The preset threshold may be preset by a register. For example, the preset threshold is 5min-20min. For another example, the preset threshold is 10min.
According to the embodiment of the invention, infrared human body induction detection can be performed during the working period of the load, such as the on-state of the lamp, and when the infrared signal of the human body is not detected continuously within the preset time, the automatic power-off can be controlled, so that the load stops working, and the automatic load switching-off, such as the off-state of the lamp, is realized, and unnecessary energy waste is avoided. The induction switch control device can enable the lamp to achieve a human body induction function and a double control function at the same time, and control of the lamp is more intelligent and humanized.
In one embodiment, as shown in fig. 2, the first driving sub-circuit 131 includes a resistor R1, a resistor R7, and a first switching tube unit; one end of a resistor R7 is connected with the first output end of the main control chip, the other end of the resistor R7 is connected with the first end of the first switching tube unit, the other end of the resistor R7 is grounded through a resistor R1, the second end of the first switching tube unit is grounded through a first coil of a relay K1, and the third end of the first switching tube unit is connected with the second voltage output end of the power supply module.
The first switching tube unit can be formed by connecting one or more switching tubes in series. For example, in order to make the circuit more stable, the first switching tube unit employs two switching tubes. For another example, the first switching transistor unit adopts two triodes with different polarities. As shown in fig. 3, the first switching transistor unit includes a transistor Q1, a resistor R33, and a transistor Q4; the other end of the base electrode connecting resistor R7 of the triode Q1, the emitter electrode of the triode Q1 is used for grounding, the collector electrode of the triode Q1 is connected with the base electrode of the triode Q4 through a resistor R33, the emitter electrode of the triode Q4 is connected with the second voltage output end of the power supply module, and the collector electrode of the triode Q4 is grounded through the first coil of the relay K1. Optionally, the first switching tube unit further includes a diode D2, a resistor R37, and a capacitor C18, where the diode D2, the resistor R37, and the capacitor C18 form a protection circuit to avoid the breakdown of the transistor Q4 due to the voltage peak generated during switching. It can be understood that fig. 3 shows some types or specifications of components, and those skilled in the art can flexibly design the types or specifications of alternative components, and those skilled in the art can understand that uf in fig. 3 is μf, which will not be described in detail.
In an actual application, taking Q1 as an NPN triode and Q4 as a PNP triode as an example, when the first output end of the main control chip outputs a high level, both the triode Q1 and the triode Q4 are turned on, so that a current passes through the first coil K1B of the relay, and the movable contact of the relay switch K1A is attracted to the first pair of stationary contacts.
In one embodiment, as shown in fig. 4, the second driving sub-circuit includes a resistor R11, a resistor R17, and a second switching tube unit; one end of the resistor R11 is connected with the second output end of the main control chip, the other end of the resistor R11 is connected with the first end of the second switching tube unit, the other end of the resistor R11 is grounded through the resistor R17, the second end of the second switching tube unit is grounded through the second coil of the relay K1, and the third end of the second switching tube unit is connected with the second voltage output end of the power supply module.
The second switching tube unit can be formed by connecting one or more switching tubes in series. For example, in order to make the circuit more stable, the second switching tube unit employs two switching tubes. For another example, the second switching transistor unit adopts two triodes with different polarities. As shown in fig. 5, the second switching transistor unit includes a transistor Q2, a resistor R32, and a transistor Q3; the other end of the base electrode connecting resistor R11 of triode Q2, triode Q2's projecting pole is used for ground connection, triode Q3's base is connected through resistance R32 to triode Q2's collecting electrode, and power module's second voltage output is connected to triode Q3's projecting pole, and triode Q3's collecting electrode passes through relay K1's second coil ground connection. Optionally, the second switching tube unit further includes a diode D5, a resistor R38, and a capacitor C16, where the diode D5, the resistor R38, and the capacitor C16 form a protection circuit to prevent the transistor Q4 from being damaged due to breakdown of a voltage peak generated during switching.
The working principle of the second driving sub-circuit is similar to that of the first driving sub-circuit, and will not be repeated here.
In one embodiment, as shown in fig. 6, the sensing circuit includes a signal processing chip U4 and an infrared sensor PIR1, a first input pin of the signal processing chip U4 is connected to a signal output end of the infrared sensor, and a first output pin of the signal processing chip is connected to a first signal input pin of the main control chip. The signal processing chip U4 is used for receiving the infrared induction signal detected by the infrared sensor PIR1, processing the infrared induction signal and sending the processed infrared induction signal PIR to the main control chip.
Optionally, as shown in fig. 6, the sensing circuit further includes a photosensitive element CDS1 and a resistor R14, one end of the photosensitive element is connected to the second input pin of the signal processing chip, one end of the photosensitive element is grounded through the resistor R14, the other end of the photosensitive resistor is connected to the second input pin of the signal processing chip, and the second output pin of the signal processing chip is connected to the second signal input pin of the main control chip. The photosensitive element CDS1 is a phototransistor or a photoresistor, and fig. 6 is an example of the phototransistor. The current value of the phototriode changes along with the change of the ambient light brightness, the signal processing chip detects the change of the current value through the second input pin, and after signal processing, the signal processing chip sends an optical signal CDS to the main control chip through the second output pin, so that the main control chip controls the relay according to the infrared induction signal and the optical signal. Therefore, the lamp can be controlled to be turned off automatically when the human infrared signal is not detected for a certain time, for example, the lamp can be turned off automatically when the ambient light brightness is brighter, or the lamp can be controlled to be turned on when the ambient light brightness is darker and the human infrared signal is detected, so that the lamp is controlled more intelligently.
Optionally, as shown in fig. 6, the sensing circuit further includes a photosensitive adjusting switch SW1, a resistor R39 and a resistor R13, where a movable contact of the photosensitive adjusting switch SW1 is connected to the second voltage output end, a first stationary contact of the photosensitive adjusting switch is connected to a second input pin of the signal processing chip through the resistor R39 and the resistor R13 which are connected in series, and the second stationary contact of the photosensitive adjusting switch is connected to a connection node of the resistor R39 and the resistor R13. When the movable contact of the photosensitive regulating switch is closed with different fixed contacts, the voltage values detected by the second input pins of the signal processing chip are different, and the signal processing chip judges whether to start the photosensitive control function according to the voltage values, so that a user can select whether to start the photosensitive control function by controlling the photosensitive regulating switch, and the control of the lamp is more humanized.
In one embodiment, as shown in fig. 7, the double-control switch S1 includes a live wire terminal L, a movable contact L1, a stationary contact A1, and a stationary contact A2, and the switch K1A of the relay K1 includes two movable contacts and first to fourth stationary contacts; the live wire terminal L is connected with a second input end of the power supply module, the live wire terminal L is also used for connecting a live wire, the movable contact L1 is used for connecting a zero line through a load, the fixed contact A1 is respectively connected with a first fixed contact of the switch K1A and a fourth fixed contact of the switch K1A, the fixed contact A2 is respectively connected with a second fixed contact of the switch K1A and a third fixed contact of the switch K1A, and two movable contacts of the switch K1A are respectively connected with two fixed contacts of the double-throw switch; when the first coil of the relay K1 is electrified, the two movable contacts of the switch K1A are respectively connected with the first fixed contact of the switch K1A and the third fixed contact of the switch K1A; when the second coil of the relay K1 is electrified, the two movable contacts of the switch K1A are respectively connected with the second fixed contact of the switch K1A and the fourth fixed contact of the switch K1A.
As an embodiment, as shown in fig. 7, the inductive switch control device 10 further includes a connection terminal P3, and the switch circuit 120 is connected to an external power source, for example, to a mains supply through the connection terminal P3.
As shown in fig. 8, the circuit structure of the power module 150 mainly includes a transformer T3, a rectifier bridge BR1 and a voltage regulator U1 connected in sequence, wherein the output end of the voltage regulator U1 is a first voltage output end of the power module, and the positive output end of the rectifier bridge BR1 is a second voltage output end of the power module. Optionally, the power module 150 may further include a fuse F3 and a plurality of components such as a voltage stabilizing tube, a diode, and a capacitor, which can perform protection, voltage stabilizing, rectifying and filtering functions.
Optionally, as shown in fig. 7, the inductive switch control device further includes a zero-crossing detection circuit 160, a first input end of the zero-crossing detection circuit is connected to the first voltage output end, a second input end of the zero-crossing detection circuit is connected to the second voltage output end, and an output end of the zero-crossing detection circuit is connected to the third signal input end of the main control chip.
The zero crossing detection circuit is used for inputting a control signal ZC to a third signal input end of the main control chip when the alternating current reaches the zero crossing point, and the main control chip sequentially outputs control signals of the relay through the first output end and the second output end when receiving the control signal ZC, so that the relay can be controlled to act when the alternating current crosses the zero crossing point, and the relay contacts are protected from being corroded.
Specifically, as shown in fig. 7, the zero-crossing detection circuit 160 includes a resistor R3, a resistor R4, a resistor R5, a resistor R9, a capacitor C1, and a triode Q8, wherein a base electrode of the triode Q8 is connected to a second voltage output end of the power supply module through the resistor R5, a base electrode of the triode Q8 is further grounded through the resistor R9 and the capacitor C1 connected in parallel, an emitter electrode of the triode Q8 is grounded, a collector electrode of the triode Q8 is connected to a first voltage output end of the power supply module through the resistor R4, and a collector electrode of the triode Q8 is further connected to a third signal input end of the main control chip through the resistor R3. The pulsating direct current output by the rectifier bridge BR2 is divided by a resistor R5 and a resistor R9 to provide base voltage for the triode Q8, when the base voltage of the triode Q8 is larger than 0.7V, the triode Q8 is conducted, and a low level is formed at the collector of the triode Q8; when the base voltage of the triode Q8 is lower than 0.7V, the triode Q8 is cut off, and the collector of the triode Q8 forms a high level through a pull-up resistor R4. In this way, through repeated on and off of the triode Q8, a pulse signal with a certain frequency is output at the collector electrode of the triode Q8, and the main control chip receives the pulse signal through the third signal input end and detects the zero crossing point of the voltage.
In an actual application, as shown in fig. 8, after the load is turned on, the main control chip starts to detect the infrared signal PIR and the optical signal CDS, when the infrared signal PIR and the optical signal CDS both reach a preset condition, the main control chip starts to time, for example, time for 10min, if no infrared signal is detected within 10min, the zero crossing signal ZC is detected, and when the ac input reaches the zero crossing point, the relay is controlled to act by the control signal Out1 and the control signal Out2, so as to turn off the load.
The inductive switch control device controls the load to be started or closed by the double-control switch, and simultaneously, the human body inductive switch detects the human body activity and closes the load at fixed time, for example, the lamp is turned off, so that the load equipment such as a lamp has the double-control and human body induction functions; the light-sensitive element can also enable the load equipment to have a light control function; the static current of the inductive switch control device can reach 0uA, and the requirements of various types of loads can be met.
It will be appreciated that the inductive switch control device described above is applicable to other types of loads besides light loads, for example alarm loads.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening files present.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. The utility model provides an inductive switch controlling means which characterized in that, includes main control chip, switch circuit, relay drive circuit, induction circuit and power module, wherein:
the switching circuit comprises a double-control switch S1, a double-throw switch S2 and a relay K1, wherein a static contact of a switch K1A of the relay K1 is connected with a static contact of the double-control switch S1, a movable contact of the switch K1A is connected with a static contact of the double-throw switch S2, a static contact of the double-throw switch S2 is connected with a first input end of the power supply module, the double-control switch S1 is used for connecting a load and an external power supply, and a live wire terminal of the double-control switch S1 is connected with a second input end of the power supply module;
the power supply module comprises a first voltage output end and a second voltage output end, and the first voltage output end is respectively connected with the power supply end of the main control chip and the power supply end of the induction circuit;
the relay driving circuit comprises a first driving sub-circuit and a second driving sub-circuit, the first driving sub-circuit is respectively connected with the second voltage output end, the first output end of the main control chip and the first coil K1B of the relay K1, and the second driving sub-circuit is respectively connected with the second voltage output end, the second output end of the main control chip and the second coil K1C of the relay K1;
wherein the first driving sub-circuit comprises a first switching tube unit; the first switching tube unit comprises a triode Q1, a resistor R33 and a triode Q4; the base electrode of the triode Q1 is connected with the other end of the resistor R7, the emitting electrode of the triode Q1 is grounded, the collecting electrode of the triode Q1 is connected with the base electrode of the triode Q4 through the resistor R33, the emitting electrode of the triode Q4 is connected with the second voltage output end of the power supply module, and the collecting electrode of the triode Q4 is grounded through the first coil of the relay K1; the polarities of the triode Q1 and the triode Q4 are different;
the second driving sub-circuit comprises a second switching tube unit, wherein the second switching tube unit comprises a triode Q2, a resistor R32 and a triode Q3; the base electrode of the triode Q2 is connected with the other end of the resistor R11, the emitting electrode of the triode Q2 is grounded, the collecting electrode of the triode Q2 is connected with the base electrode of the triode Q3 through the resistor R32, the emitting electrode of the triode Q3 is connected with the second voltage output end of the power supply module, and the collecting electrode of the triode Q3 is grounded through the second coil of the relay K1; the polarities of the triode Q2 and the triode Q3 are different;
the signal input pin of the main control chip is connected with the output end of the induction circuit, and the main control chip is used for outputting control signals through the first output end and the second output end in sequence when the duration of continuously not receiving the infrared induction signals is longer than a preset threshold value;
the sensing circuit comprises an infrared pyroelectric sensor, and the infrared pyroelectric sensor is used for sending infrared sensing signals to the main control chip;
the main control chip is used for recording the interruption time of an infrared induction signal sent by the infrared pyroelectric sensor during the load working period, and outputting a control signal Out1 at a first output end of the main control chip when the interruption time is longer than a preset threshold value, wherein the control signal Out1 enables the first driving sub-circuit to be conducted, and then current is generated in the first coil K1B of the relay K1, so that a pair of movable contacts and a first pair of static contacts of the relay switch K1A are closed, and the power supply module is disconnected with an external power supply and the load;
after the pair of movable contacts and the first pair of fixed contacts of the relay switch K1A are closed, the power supply module is kept connected with an external power supply and a load, the second output end of the main control chip outputs a control signal Out2, the control signal Out2 enables the second driving sub-circuit to be conducted, and then current is generated in the second coil K1C of the relay K1, so that the pair of movable contacts and the second pair of fixed contacts of the relay switch K1A are closed, and the power supply module is disconnected with the external power supply and the load.
2. The inductive switch control device of claim 1, wherein said first drive sub-circuit comprises a resistor R1 and a resistor R7;
one end of the resistor R7 is connected with the first output end of the main control chip, the other end of the resistor R7 is connected with the first end of the first switching tube unit, the other end of the resistor R7 is grounded through the resistor R1, the second end of the first switching tube unit is grounded through the first coil of the relay K1, and the third end of the first switching tube unit is connected with the second voltage output end of the power supply module.
3. The inductive switch control device of claim 2, wherein said device further comprises:
the first driving sub-circuit includes a first switching tube unit including a diode D2, a resistor R37, and a capacitor C18.
4. The inductive switch control device of claim 1, wherein said second drive sub-circuit comprises a resistor R11 and a resistor R17;
one end of the resistor R11 is connected with the second output end of the main control chip, the other end of the resistor R11 is connected with the first end of the second switching tube unit, the other end of the resistor R11 is grounded through the resistor R17, the second end of the second switching tube unit is grounded through the second coil of the relay K1, and the third end of the second switching tube unit is connected with the second voltage output end of the power supply module.
5. The inductive switch control device of claim 4, wherein said device further comprises:
the second switching tube unit further comprises a diode D5, a resistor R38 and a capacitor C16.
6. The inductive switch control device according to claim 1, wherein the double control switch S1 includes a live wire terminal L, a movable contact L1, a stationary contact A1, and a stationary contact A2, and the switch K1A of the relay K1 includes two movable contacts and first to fourth stationary contacts;
the live wire terminal L is connected with a second input end of the power supply module, the live wire terminal L is also used for connecting a live wire, the movable contact L1 is used for connecting a zero line through a load, the fixed contact A1 is respectively connected with a first fixed contact of the switch K1A and a fourth fixed contact of the switch K1A, the fixed contact A2 is respectively connected with a second fixed contact of the switch K1A and a third fixed contact of the switch K1A, and two movable contacts of the switch K1A are respectively connected with two fixed contacts of the double-throw switch;
when the first coil of the relay K1 is electrified, two movable contacts of the switch K1A are respectively connected with a first fixed contact of the switch K1A and a third fixed contact of the switch K1A;
when the second coil of the relay K1 is electrified, two movable contacts of the switch K1A are respectively connected with the second fixed contact of the switch K1A and the fourth fixed contact of the switch K1A.
7. The inductive switch control device of claim 1, wherein the inductive circuit comprises a signal processing chip and an infrared sensor, a first input pin of the signal processing chip is connected to a signal output end of the infrared sensor, and a first output pin of the signal processing chip is connected to a first signal input pin of the main control chip.
8. The inductive switch control device according to claim 7, wherein the inductive circuit further comprises a photosensitive element and a resistor R14, one end of the photosensitive element is connected to the second input pin of the signal processing chip, one end of the photosensitive element is grounded through the resistor R14, the other end of the photosensitive element is connected to the second input pin of the signal processing chip, and the second output pin of the signal processing chip is connected to the second signal input pin of the main control chip.
9. The inductive switch control device according to claim 8, wherein the inductive circuit further comprises a photosensitive adjusting switch SW1, a resistor R39 and a resistor R13, wherein a movable contact of the photosensitive adjusting switch SW1 is connected to the second voltage output terminal, a first stationary contact of the photosensitive adjusting switch is connected to a second input pin of the signal processing chip through the resistor R39 and the resistor R13 which are connected in series, and a second stationary contact of the photosensitive adjusting switch is connected to a connection node of the resistor R39 and the resistor R13.
10. The inductive switch control device according to any one of claims 1 to 9, further comprising a zero-crossing detection circuit, a first input of the zero-crossing detection circuit being connected to the first voltage output, a second input of the zero-crossing detection circuit being connected to the second voltage output, and an output of the zero-crossing detection circuit being connected to a third signal input of the main control chip.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710401306.1A CN107197573B (en) | 2017-05-31 | 2017-05-31 | Inductive switch control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710401306.1A CN107197573B (en) | 2017-05-31 | 2017-05-31 | Inductive switch control device |
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| CN107197573A CN107197573A (en) | 2017-09-22 |
| CN107197573B true CN107197573B (en) | 2023-09-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111246636A (en) * | 2019-11-26 | 2020-06-05 | 深圳市酷客智能科技有限公司 | Double-control switch, double-control system and control method |
| CN114340091B (en) * | 2021-12-28 | 2023-09-08 | 广州易而达科技股份有限公司 | Lighting double-control circuit and lighting control method |
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| CN101645706A (en) * | 2009-09-08 | 2010-02-10 | 湖北盛世华龙科技有限公司 | Integrative control method of ultrared human body induction and switch |
| CN103826346A (en) * | 2012-11-16 | 2014-05-28 | 深圳市海洋王照明工程有限公司 | Light fixture and control circuit thereof |
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| CN107197573A (en) | 2017-09-22 |
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Address after: 516007 b1-b3 workshop, No.39 Hechang 6th Road East, Zhongkai high tech Zone, Huizhou City, Guangdong Province Applicant after: Legrand intelligent electric (Huizhou) Co.,Ltd. Address before: 516007 b1-b3 workshop, No.39 Hechang 6th Road East, Zhongkai high tech Zone, Huizhou City, Guangdong Province Applicant before: TCL-LEGRAND INTERNATIONAL ELECTRICAL (HUIZHOU) Co.,Ltd. |
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