Circuit for converting closed transient state of self-locking switch into transient low-level pulse
By designing a circuit structure that includes a resistor, an optocoupler, a self-locking switch, and a diode, the problem that the transient state of the self-locking switch cannot be converted into an instantaneous low-level pulse is solved, thus realizing the timing output control of the analog circuit.
Patent Information
- Application Number
- CN202423286471.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing technology cannot effectively acquire the transient state of the self-locking switch closure and convert it into an instantaneous low-level pulse, resulting in deficiencies in the timing output control level of the analog circuit.
Design a circuit that uses a circuit structure consisting of a resistor, an optocoupler, a self-locking switch, a diode, and optionally a capacitor and a Zener diode. By combining the optocoupler and the diode, the transient state of the self-locking switch closing can be converted into an instantaneous low-level pulse.
It achieves effective acquisition and conversion of the transient state of the self-locking switch closure into an instantaneous low-level pulse, meeting the timing output control requirements of analog circuits.
Smart Images
Figure CN223798223U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of design of transient acquisition circuit for self-locking switch closure in aviation products, specifically involving a circuit that converts the transient state of self-locking switch closure into an instantaneous low-level pulse. Background Technology
[0002] A certain airborne device needs to collect the status of a self-locking switch. When the self-locking switch is closed, the airborne device needs to output control levels according to a certain timing sequence.
[0003] In conventional designs, digital circuits and software are used to implement the above functions. However, in some projects, only analog circuits can be used. The timing output control level of analog circuits requires a monostable trigger circuit, which is typically triggered by a low-level pulse. Conventional switch state acquisition circuits can only acquire the steady state of the switch and cannot generate transient pulses based on switch closure.
[0004] Therefore, it is necessary to design a circuit to collect the transient state of the self-locking switch closing and convert it into an instantaneous low-level pulse trigger. Utility Model Content
[0005] This invention provides a circuit that converts the transient state of a self-locking switch closing into an instantaneous low-level pulse, by acquiring the transient state of the self-locking switch closing and converting it into an instantaneous low-level trigger.
[0006] This utility model provides a circuit for converting the transient state of a self-locking switch closure into an instantaneous low-level pulse, comprising: resistor R1, resistor R2, resistor R3, resistor R4, optocoupler H1, self-locking switch S1, and diode;
[0007] The first power supply is connected to pin 1 of the optocoupler through resistor R1, pin 2 of the optocoupler is connected to one end of the self-locking switch S1, and the other end of the self-locking switch S1 is grounded.
[0008] The first power supply is connected to one end of the self-locking switch S1 through resistors R2 and R3;
[0009] The cathode of the diode is connected to pin 1 of the optocoupler, and the anode of the diode is connected to pin 2 of the optocoupler; the second power supply is connected to pin 4 of the optocoupler through resistor R4, and pin 3 of the optocoupler is grounded.
[0010] Optionally, the circuit that converts the transient state of the self-locking switch closure into a transient low-level pulse also includes: capacitor C2;
[0011] Capacitor C2 is connected in parallel between pins 3 and 4 of the optocoupler.
[0012] Optionally, the circuit that converts the transient state of the self-locking switch closure into a transient low-level pulse also includes: capacitor C1;
[0013] Capacitor C1 is connected in parallel with resistor R3.
[0014] Optionally, the circuit that converts the transient state of the self-locking switch closure into a transient low-level pulse also includes: a Zener diode;
[0015] Zener diode V1 is connected in parallel with resistor R3.
[0016] Optional, the first power supply is 28V.
[0017] Optionally, the second power supply is 12V.
[0018] This invention provides a circuit for converting the transient state of a self-locking switch closing into an instantaneous low-level pulse, comprising: resistors R1, R2, R3, and R4; an optocoupler H1; a self-locking switch S1; and a diode. A first power supply is connected to pin 1 of the optocoupler via resistor R1, pin 2 of the optocoupler is connected to one end of the self-locking switch S1, and the other end of the self-locking switch S1 is connected to 28V_IN_GND. The first power supply is also connected to one end of the self-locking switch S1 via resistors R2 and R3. The cathode of the diode is connected to pin 1 of the optocoupler, and the anode of the diode is connected to pin 2 of the optocoupler. A second power supply is connected to pin 4 of the optocoupler via resistor R4, and pin 3 of the optocoupler is connected to GND. This invention acquires the transient state of the self-locking switch closing and converts it into an instantaneous low-level trigger, thus realizing the acquisition and conversion of the transient state of the self-locking switch closing into an instantaneous low level. Attached Figure Description
[0019] Figure 1 This invention presents a circuit diagram illustrating how a self-locking switch can be converted from a transient closing state into an instantaneous low-level pulse. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0021] The features and illustrative embodiments of various aspects of this utility model will now be described in detail. In the following detailed description, numerous specific details are set forth in order to provide a comprehensive understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this utility model by illustrating examples of it. This utility model is by no means limited to any specific arrangements and methods set forth below, but covers any improvements, substitutions, and modifications to the structure, method, and apparatus without departing from the spirit of this utility model. In the accompanying drawings and the following description, well-known structures and techniques are not shown to avoid unnecessarily obscuring this utility model.
[0022] It should be noted that, where there is no conflict, the embodiments of this utility model and the features therein can be combined with each other, and the various embodiments can be referenced and cited in turn. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.
[0023] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.
[0024] Figure 1 This invention provides a circuit schematic for converting the transient state of a self-locking switch closure into an instantaneous low-level pulse. Figure 1 As shown, it includes: resistor R1, resistor R2, resistor R3, resistor R4, optocoupler H1, self-locking switch S1, capacitor C1, Zener diode V1, diode, and capacitor C2.
[0025] 28V_IN is connected to pin 1 of the optocoupler through resistor R1. Pin 2 of the optocoupler is connected to one end of the self-locking switch S1, and the other end of the self-locking switch S1 is connected to 28V_IN_GND. 28V_IN is connected to one end of the self-locking switch S1 through resistors R2 and R3. Capacitor C1 and Zener diode V1 are connected in parallel with resistor R3. The cathode of the diode is connected to pin 1 of the optocoupler, and the anode of the diode is connected to pin 2 of the optocoupler. 12V is connected to pin 4 of the optocoupler through resistor R4, and pin 3 of the optocoupler is connected to GND. Capacitor C2 is connected in parallel between pins 3 and 4 of the optocoupler.
[0026] When the self-locking switch is open, optocoupler H1 is not working, and signal CTL is pulled up to a high level through resistor R4. When the self-locking switch S1 is closed, 28V_IN is grounded through resistor R1, pin 1 of the optocoupler, and self-locking switch S1, forming a power supply circuit. Current flows through the primary terminal of the optocoupler, the optocoupler is working, the secondary is turned on, and signal CTL is grounded through the secondary of the optocoupler, CTL is converted to a low level. At the same time, 28V_IN is divided by resistors R2 and R3 and charges capacitor C1. The voltage on capacitor C1 rises slowly until it exceeds the turn-on voltage of N-channel MOSFET Q1, and N-channel MOSFET Q1 is turned on. After that, 28V_IN is grounded through resistor R1, N-channel MOSFET Q1, and self-locking switch S1, optocoupler H1 is short-circuited, optocoupler H1 stops working, and signal CTL is converted to a high level. Because the capacitance of capacitor C1 is very small, the signal CTL level changes from high to low level the instant the self-locking switch S1 is closed, and then instantly changes back to high level. The signal CTL generates a momentary low level signal the instant the self-locking switch is closed.
[0027] The above description is merely a specific embodiment of this utility model, providing a detailed description of the utility model. Parts not covered in detail are conventional techniques. However, the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model should be included within the protection scope of this utility model. The protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A circuit for converting the transient state of a self-locking switch closure into an instantaneous low-level pulse, characterized in that, include: Resistors R1, R2, R3, R4, optocoupler H1, self-locking switch S1, diode; The first power supply is connected to pin 1 of the optocoupler through resistor R1, pin 2 of the optocoupler is connected to one end of the self-locking switch S1, and the other end of the self-locking switch S1 is grounded. The first power supply is connected to one end of the self-locking switch S1 through resistors R2 and R3; The cathode of the diode is connected to pin 1 of the optocoupler, and the anode of the diode is connected to pin 2 of the optocoupler; the second power supply is connected to pin 4 of the optocoupler through resistor R4, and pin 3 of the optocoupler is grounded.
2. The circuit for converting the transient state of a self-locking switch closure into a transient low-level pulse according to claim 1, characterized in that, Also includes: Capacitor C2; Capacitor C2 is connected in parallel between pins 3 and 4 of the optocoupler.
3. The circuit for converting the transient state of a self-locking switch closure into a transient low-level pulse according to claim 1, characterized in that, Also includes: Capacitor C1; Capacitor C1 is connected in parallel with resistor R3.
4. The circuit for converting the transient state of a self-locking switch closure into a transient low-level pulse according to claim 1, characterized in that, Also includes: Zener diode; Zener diode V1 is connected in parallel with resistor R3.
5. The circuit for converting the transient state of a self-locking switch closure into a transient low-level pulse according to claim 1, characterized in that, The primary power supply is 28V.
6. The circuit for converting the transient state of a self-locking switch closure into a transient low-level pulse according to claim 1, characterized in that, The second power supply is 12V.