Self-generating electric key detection circuit, self-generating electric key detection device and self-generating switch

Abstract

The present application is applicable to the field of switch detection technology, and provides a self-harvesting electric key detection circuit, a self-harvesting electric key detection device and a self-generating switch. The alternating current signal output by the self-generating core is converted into a first direct current voltage signal through a unidirectional conductive switch circuit to store or discharge energy in the energy storage delay circuit, thereby generating a corresponding switch control signal to control the conduction and shutdown of the switch circuit. The voltage conversion circuit converts the alternating current signal output by the self-generating core into a second direct current voltage signal and sends it to the switch circuit. The switch circuit generates a self-harvesting electric key detection signal according to the second direct current voltage signal and the switch control signal, thereby solving the problem that the existing self-generating switch cannot recognize whether the key switch is pressed or rebounded.

Description

Technical Field

[0001] The present application belongs to the technical field of switch detection, and in particular relates to a self-generating electric key detection circuit, a self-generating electric key detection device and a self-generating switch. Background Art

[0002] Traditional switches are mainly powered by direct wiring or batteries. As electrical equipment is widely used, electrical equipment has higher requirements for the scope of use and functionality of switches. In a self-generating switch, by operating the magnet group up and down by pressing a button, the self-generating core can convert mechanical energy into electrical energy, thereby realizing self-generation to provide power for the control board and generate corresponding control signals. Self-generating switches are favored by users because they do not require batteries and have simple wiring.

[0003] However, the existing self-generating switch has the problem of being unable to identify whether the key switch is pressed or rebounded, which greatly limits the application scope of the self-generating switch. Summary of the invention

[0004] In view of this, the embodiments of the present application provide a self-powered key detection circuit, a self-powered key detection device and a self-generating switch, which can solve the problem of the existing self-generating switch being unable to recognize whether the key switch is pressed or rebounded.

[0005] A first aspect of an embodiment of the present application provides a self-generated electric key detection circuit, connected to a self-generated electric core, the self-generated electric key detection circuit comprising:

[0006] a unidirectional conductive switch circuit, connected to the self-generating core, for converting the alternating current signal output by the self-generating core into a first direct current voltage signal, and performing delay processing on the first direct current voltage signal;

[0007] an energy storage delay circuit, connected to the unidirectional conductive switch circuit, configured to receive the first DC voltage signal, and store or discharge energy according to the first DC voltage signal to generate a corresponding switch control signal;

[0008] a voltage conversion circuit, connected to the self-generating core, for converting the alternating current signal output by the self-generating core into a second direct current voltage signal, and performing a wave smoothing process on the second direct current voltage signal; and

[0009] The switch circuit is connected to the energy storage delay circuit and the voltage conversion circuit, and is used to receive the second DC voltage signal and the switch control signal, and generate a self-acquired electric key detection signal according to the second DC voltage signal and the switch control signal.

[0010] Optionally, the unidirectional conductive switch circuit includes a first switch tube, a control end of the first switch tube and a current input end of the first switch tube are commonly connected to the self-generating core, and a current output end of the first switch tube is connected to the energy storage delay circuit.

[0011] Optionally, the energy storage delay circuit includes a capacitor unit and a resistor unit;

[0012] The first end of the capacitor unit and the first end of the resistor unit are commonly connected to the unidirectional conductive switch circuit, and the second end of the resistor unit and the second end of the capacitor unit are commonly connected to the ground.

[0013] Optionally, the capacitor unit is a first capacitor.

[0014] Optionally, the resistance unit includes a first resistor and a second resistor, the first end of the first resistor is connected to the capacitor unit, the second end of the first resistor and the first end of the second resistor are connected to the switch circuit, and the second end of the second resistor is grounded.

[0015] Optionally, the second resistor is an adjustable resistor.

[0016] Optionally, the switching circuit includes a second switching tube and a third resistor; the current input end of the second switching tube and the first end of the third resistor are connected to the output end of the switching circuit, the second end of the third resistor is connected to the voltage conversion circuit, the control end of the second switching tube is connected to the energy storage delay circuit, and the current output end of the second switching tube is grounded.

[0017] Optionally, the second switching tube is an NPN transistor.

[0018] A second aspect of the embodiments of the present application provides a self-acquired electric key detection device, comprising a self-acquired electric key detection circuit as described in any one of the above.

[0019] A third aspect of the embodiments of the present application provides a self-generating switch, comprising a self-generating core and a self-generating key detection circuit as described in any one of the above.

[0020] The embodiments of the present application provide a self-generated electric key detection circuit, a self-generated electric key detection device and a self-generated switch. The alternating current signal output by the self-generated core is converted into a first direct current voltage signal through a unidirectional conductive switch circuit to store or discharge energy in the energy storage delay circuit, thereby generating a corresponding switch control signal to control the conduction and shutdown of the switch circuit. The voltage conversion circuit converts the alternating current signal output by the self-generated core into a second direct current voltage signal and sends it to the switch circuit. The switch circuit generates a self-generated electric key detection signal according to the second direct current voltage signal and the switch control signal, thereby solving the problem that the existing self-generated switch cannot recognize whether the key switch is pressed or rebounded. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 It is a structural schematic diagram of a self-acquisition electric key detection circuit provided by an embodiment of the present application;

[0023] Figure 2 It is a waveform diagram of the output terminal VDD of the voltage conversion circuit 23 and the output terminal Y of the switch circuit when the key switch provided by an embodiment of the present application is pressed;

[0024] Figure 3 It is a waveform diagram of the output terminal VDD of the voltage conversion circuit 23 and the output terminal Y of the switch circuit when the key switch is rebounded provided by an embodiment of the present application;

[0025] Figure 4 It is a structural schematic diagram of a self-collecting electric key detection circuit provided by another embodiment of the present application. DETAILED DESCRIPTION

[0026] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] In the self-generating switch, the self-generating core is coupled to the linkage device, so that when the key switch is pressed, the linkage device drives the self-generating core to cut the magnetic flux lines to generate electrical energy, and a reset member is arranged under the linkage arm to store energy when the linkage device is pushed downward, so that the linkage arm is released when the key switch is released, and the linkage arm is returned to its original position. Specifically, the reset member elastically supports the linkage arm in the initial state of the self-generating switch, and stores potential energy when the self-generating switch is pressed, and then when the key switch is released, the reset member releases the potential energy to return the linkage arm to its original position.

[0029] Figure 1 This is a schematic diagram of a self-detecting electric key detection circuit provided in an embodiment of the present application, see Figure 1 As shown, the self-harvesting electric key detection circuit in this embodiment is connected to the self-generating core 10, and the self-harvesting electric key detection circuit includes: a unidirectional conductive switch circuit 21, connected to the self-generating core 10, used to convert the AC signal output by the self-generating core 10 into a first DC voltage signal, and delay the first DC voltage signal; an energy storage delay circuit 22, connected to the unidirectional conductive switch circuit 21, used to receive the first DC voltage signal, and store or discharge energy according to the first DC voltage signal to generate a corresponding switch control signal; a voltage conversion circuit 23, connected to the self-generating core 10, used to convert the AC signal output by the self-generating core 10 into a second DC voltage signal, and smooth the second DC voltage signal; a switch circuit 24, connected to the energy storage delay circuit 22 and the voltage conversion circuit 23, used to receive the second DC voltage signal and the switch control signal, and generate a self-harvesting electric key detection signal according to the second DC voltage signal and the switch control signal.

[0030] In this embodiment, the AC signal generated by the self-generating core 10 is processed by the unidirectional conductive switch circuit 21 to generate a corresponding first DC voltage signal and send it to the energy storage delay circuit 22. The energy storage delay circuit 22 performs delay processing on the first DC voltage signal. For example, after the key switch is pressed, the self-generating core 10 cuts the magnetic field, converts the kinetic energy into electric current, and generates a corresponding first DC voltage signal after passing through the unidirectional conductive switch circuit 21. At the same time, the voltage conversion circuit 23 converts the AC signal output by the self-generating core 10 into a second DC voltage signal. When the first DC voltage signal passes through the energy storage delay circuit 22, the energy storage delay circuit 22 is first charged, and a switch control signal is generated and sent to the control end of the switch circuit 24. The switch control signal controls the conduction and shutdown of the switch circuit, thereby controlling the self-generated key detection signal output by its output end Y, and then completing the detection of the pressing and rebounding of the key switch. For example, when the voltage of the switch control signal generated by charging is the switch threshold voltage, the switch circuit 24 is turned on, and the output terminal Y of the switch circuit 24 is grounded. At this time, the self-acquired electric key detection signal is a low level signal.

[0031] The key switch generates a complete AC signal when it is pressed and rebounded. Since the unidirectional conductive switch circuit 21 has a unidirectional conductive characteristic, a positive first DC voltage signal is generated only when the key switch is pressed. When the key switch rebounds, if there is no new current signal input to the unidirectional conductive switch circuit 21, the energy storage delay circuit 22 is discharged, the voltage of the first DC voltage signal reaches 0V, the switch circuit 24 is turned off, and the voltage signal at the output terminal Y of the switch circuit 24 is consistent with the voltage signal at the output terminal VDD of the voltage conversion circuit 23.

[0032] In one embodiment, the sum of the charging time and the discharging time of the energy storage delay circuit 22 is less than the time for the voltage conversion circuit 23 to convert the AC signal into the second DC voltage signal and send it to the switch circuit 24. Therefore, after the AC signal generated by the self-generating core 10 disappears and the energy storage delay circuit 22 completes the discharge, the switch circuit 24 is turned off. Due to the presence of a large capacitor in the voltage conversion circuit 23, the second DC voltage signal continues to be maintained. The self-generated power key detection signal outputted from the output terminal Y of the switch circuit 24 will follow the second DC voltage signal after a short low level. See Figure 2 As shown, its waveform is low at first and then high, and then consistent with the second DC voltage signal, and due to the delay lag of the energy storage delay circuit 22, the signal at the output terminal Y of the switch circuit 24 lags behind the high level of the output terminal VDD of the voltage conversion circuit 23, and is judged to be pressed at this time, thereby completing the recognition process of the key switch being pressed.

[0033] After the key switch is released, the key switch bounces back. Since the negative half-cycle signal in the AC signal output by the self-generating core cannot pass through the unidirectional conductive switch circuit 21, and the energy storage delay circuit 22 has been completely discharged, the switch circuit 24 is in the off state. The voltage conversion circuit 23 rectifies the negative half-cycle signal in the sine wave signal output from the output terminal B of the self-generating core 10 and sends it to the output terminal Y of the switch circuit 24. At this time, the waveform of the self-generated key detection signal at the output terminal Y of the switch circuit 24 is consistent with the waveform of the second DC voltage signal at the output terminal VDD of the voltage conversion circuit 23, thereby completing the detection of the key bounce. Therefore, the state of the key switch can be determined by judging the waveform of the output terminal Y of the switch circuit 24 and the waveform of the output terminal VDD of the voltage conversion circuit 23. If there is a phase difference between the waveform of the output terminal Y of the switch circuit 24 and the waveform of the output terminal VDD of the voltage conversion circuit 23, see Figure 3 As shown, the key switch is pressed, and if the waveform of the output terminal Y of the switch circuit 24 is synchronized with the waveform of the output terminal VDD of the voltage conversion circuit 23, the key switch rebounds.

[0034] In one embodiment, see Figure 4 As shown, the unidirectional conductive switch circuit 21 includes a first switch tube Q1, a control end of the first switch tube Q1 and a current input end of the first switch tube Q1 are connected to the self-generating core 10, and a current output end of the first switch tube Q1 is connected to the energy storage delay circuit 22.

[0035] In one embodiment, the first switch tube Q1 may be an NPN transistor.

[0036] In one embodiment, see Figure 4 As shown, the energy storage delay circuit 22 includes a capacitor unit 221 and a resistor unit 222; the first end of the capacitor unit 221 and the first end of the resistor unit 222 are connected to the unidirectional conductive switch circuit 21, and the second end of the resistor unit 222 and the second end of the capacitor unit 221 are connected to the ground.

[0037] In one embodiment, see Figure 4 As shown, the capacitor unit 221 is a first capacitor C1.

[0038] In one embodiment, the resistance unit 222 may be a single resistor, or a load circuit composed of a plurality of resistors connected in series or in parallel.

[0039] For example, in one embodiment, see Figure 4 As shown, the resistor unit 222 includes a first resistor R1 and a second resistor R2, the first end of the first resistor R1 is connected to the capacitor unit 221, the second end of the first resistor R1 and the first end of the second resistor R2 are connected to the switch circuit 24, and the second end of the second resistor R2 is grounded.

[0040] In one embodiment, the second resistor R2 is an adjustable resistor.

[0041] In this embodiment, the charging time and discharging time of the energy storage delay circuit 22 can be adjusted by an adjustable resistor.

[0042] In one embodiment, the first resistor R1 may also be an adjustable resistor.

[0043] In one embodiment, see Figure 4 As shown, the switch circuit 24 includes a second switch tube Q2 and a third resistor R3; the current input end of the second switch tube Q2 and the first end of the third resistor R3 are connected to the output end of the switch circuit 24, the second end of the third resistor R3 is connected to the voltage conversion circuit 23, the control end of the second switch tube Q2 is connected to the energy storage delay circuit 22, and the current output end of the second switch tube Q2 is grounded.

[0044] In one embodiment, the second switch tube Q2 is an NPN transistor.

[0045] A second aspect of the embodiments of the present application provides a self-acquisition electric key detection device, comprising a self-acquisition electric key detection circuit as described in any one of the above embodiments.

[0046] A third aspect of the embodiments of the present application provides a self-generating switch, comprising a self-generating core 10 and a self-generating key detection circuit as described in any one of the above.

[0047] The embodiments of the present application provide a self-generated electric key detection circuit, a self-generated electric key detection device and a self-generated switch. The alternating current signal output by the self-generated core is converted into a first direct current voltage signal through a unidirectional conductive switch circuit to store or discharge energy in the energy storage delay circuit, thereby generating a corresponding switch control signal to control the conduction and shutdown of the switch circuit. The voltage conversion circuit converts the alternating current signal output by the self-generated core into a second direct current voltage signal and sends it to the switch circuit. The switch circuit generates a self-generated electric key detection signal according to the second direct current voltage signal and the switch control signal, thereby solving the problem that the existing self-generated switch cannot recognize whether the key switch is pressed or rebounded.

[0048] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A self-powered key detection circuit, connected to a self-powered core, characterized in that: The self-acquisition electric key detection circuit comprises: a unidirectional conductive switch circuit connected to the self-generating core, used for converting the alternating current signal output by the self-generating core into a first direct current voltage signal, and performing delay processing on the first direct current voltage signal; the self-generating core is coupled to a linkage device, and when the key switch is pressed, the linkage device drives the self-generating core to cut the magnetic flux lines to generate electrical energy; an energy storage delay circuit, connected to the unidirectional conductive switch circuit, configured to receive the first DC voltage signal, and store or discharge energy according to the first DC voltage signal to generate a corresponding switch control signal; a voltage conversion circuit, connected to the self-generating core, for converting the alternating current signal output by the self-generating core into a second direct current voltage signal, and performing a wave smoothing process on the second direct current voltage signal; and The switch circuit is connected to the energy storage delay circuit and the voltage conversion circuit, and is used to receive the second DC voltage signal and the switch control signal, and generate a self-acquired electric key detection signal according to the second DC voltage signal and the switch control signal.

2. The self-powered key detection circuit according to claim 1, characterized in that: The unidirectional conductive switch circuit includes a first switch tube, a control end of the first switch tube and a current input end of the first switch tube are commonly connected to the self-generating core, and a current output end of the first switch tube is connected to the energy storage delay circuit.

3. The self-powered key detection circuit as claimed in claim 2, characterized in that: The energy storage delay circuit includes a capacitor unit and a resistor unit; The first end of the capacitor unit and the first end of the resistor unit are commonly connected to the unidirectional conductive switch circuit, and the second end of the resistor unit and the second end of the capacitor unit are commonly connected to the ground.

4. The self-powered key detection circuit as claimed in claim 3, characterized in that: The capacitor unit is a first capacitor.

5. The self-powered key detection circuit as claimed in claim 3, characterized in that: The resistor unit includes a first resistor and a second resistor, a first end of the first resistor is connected to the capacitor unit, a second end of the first resistor and a first end of the second resistor are connected to the switch circuit, and a second end of the second resistor is grounded.

6. The self-powered key detection circuit as claimed in claim 5, characterized in that: The second resistor is an adjustable resistor.

7. The self-powered key detection circuit according to claim 1, characterized in that: The switching circuit includes a second switching tube and a third resistor; the current input end of the second switching tube and the first end of the third resistor are connected to the output end of the switching circuit, the second end of the third resistor is connected to the voltage conversion circuit, the control end of the second switching tube is connected to the energy storage delay circuit, and the current output end of the second switching tube is grounded.

8. The self-powered key detection circuit as claimed in claim 7, characterized in that: The second switch tube is an NPN transistor.

9. A self-powered key detection device, characterized in that: The invention comprises the self-acquisition electric key detection circuit as described in any one of claims 1 to 8.

10. A self-generating switch, characterized in that: It comprises a self-generating core and a self-generating electric key detection circuit as claimed in any one of claims 1 to 8.

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