High-voltage positive and negative pulse detection circuit

Abstract

The invention discloses a high-voltage positive and negative pulse detection circuit, which relates to the technical field of signal conditioning, and is characterized in that a voltage division circuit is responsible for attenuating input pulse signals, a switching diode is responsible for rectification and inputting positive and negative pulse signals into corresponding conditioning circuits respectively, and a charging circuit is responsible for maintaining pulse width characteristics of the signals; and the steepness of the signal edge is ensured by the comparator, and FPGA identification can be realized. Uncertain high-voltage pulse signals can be processed, and application scenes are diversified. The edge characteristic, pulse width and pulse direction of the pulse signal can be identified, and the signal processing capability is prominent.

Description

Technical Field

[0001] This invention relates to the field of signal conditioning technology, and in particular to a high-voltage positive and negative pulse detection circuit. Background Technology

[0002] Detecting high-voltage pulse signals often requires conditioning the signal to a low-voltage range that the detection circuit can recognize. In complex ignition systems, pulse signals need to be identified and detected.

[0003] In the existing technology, pulse triggering circuits are mostly fixed pulse triggering circuits in a single direction for high voltage applications. They only focus on the rising edge of the signal as the trigger for the back-end circuit, without judging the duration, falling edge, and direction of the pulse signal itself, and therefore cannot obtain pulse information in specific application scenarios.

[0004] It is evident that the existing technology has limited application scenarios, only being used in applications where the pulse signal has a definite direction; at the same time, it cannot obtain the duration and direction of the pulse signal. Summary of the Invention

[0005] In view of the above problems, the present invention provides a high-voltage positive and negative pulse detection circuit for overcoming or at least partially solving the above problems.

[0006] This invention provides the following solution:

[0007] A high-voltage positive and negative pulse detection circuit includes:

[0008] A voltage divider circuit is used to step down the voltage of a high-voltage pulse signal;

[0009] A negative voltage conditioning circuit is connected to the voltage divider circuit. The negative voltage conditioning circuit is used to condition the negative high voltage pulse signal into a standard low voltage negative pulse signal.

[0010] A positive voltage conditioning circuit is connected to the voltage divider circuit. The positive voltage conditioning circuit is used to condition a positive high voltage pulse signal into a standard low voltage positive pulse signal.

[0011] A comparator, connected to the negative voltage conditioning circuit and the positive voltage conditioning circuit, is used to ensure the steepness of the edges of the negative pulse signal and the positive pulse signal;

[0012] An FPGA device is connected to the comparator. The FPGA device is used to acquire the characteristic information of the negative pulse signal and the positive pulse signal provided by the comparator, so as to determine the rising edge, falling edge, pulse width and pulse direction of the high voltage pulse signal.

[0013] Preferably, the voltage divider circuit samples a 50Ω impedance for matching and uses a voltage divider resistor to reduce the voltage.

[0014] Preferably, the negative voltage conditioning circuit includes a switching diode V1, which is reverse biased to ensure that the signal channel is a negative voltage channel.

[0015] Preferably, the negative voltage conditioning circuit further includes resistors R5 and R8 and capacitor C2. Resistors R5 and R8 are used for secondary voltage division and together with capacitor C2 form an RC charging circuit.

[0016] Preferably, the negative voltage conditioning circuit further includes a Schottky diode V2 and a 1V8 network, wherein the Schottky diode V2 and the 1V8 network are used to limit the signal amplitude.

[0017] Preferably, the positive voltage conditioning circuit includes a switching diode V4, which is forward biased to ensure that the signal channel is a positive voltage channel.

[0018] Preferably, the positive voltage conditioning circuit further includes resistors R14 and R17, capacitor C9 and resistor R18, wherein resistors R14 and R17 are used for secondary voltage division, and capacitor C9 and resistor R18 are used to form an RC charging circuit.

[0019] Preferably, the positive voltage conditioning circuit further includes a Schottky diode V3; the Schottky diode V3 is used to limit the signal amplitude.

[0020] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0021] This application provides a high-voltage positive and negative pulse detection circuit. A voltage divider circuit attenuates the input pulse signal, a switching diode rectifies the signal, and the positive and negative pulse signals are input to corresponding conditioning circuits. A charging circuit maintains the pulse width characteristics of the signal, and a comparator ensures the steepness of the signal edge. This circuit can be recognized by FPGAs. It can handle uncertain high-voltage pulse signals and has diverse application scenarios. It can identify the edge characteristics, pulse width, and pulse direction of the pulse signal, demonstrating outstanding signal processing capabilities.

[0022] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0024] Figure 1 This is a circuit block diagram of a high-voltage positive and negative pulse detection circuit provided in an embodiment of the present invention;

[0025] Figure 2 This is a circuit diagram of the voltage divider circuit provided in an embodiment of the present invention;

[0026] Figure 3 This is a circuit diagram of the negative pressure conditioning circuit provided in an embodiment of the present invention;

[0027] Figure 4 This is a circuit diagram of the positive voltage conditioning circuit provided in an embodiment of the present invention. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0029] See Figure 1 This invention provides a high-voltage positive and negative pulse detection circuit, such as... Figure 1 As shown, the device may include:

[0030] A voltage divider circuit is used to step down a high-voltage pulse signal. In a specific implementation, the embodiments of this application can provide a voltage divider circuit that samples a 50Ω impedance for matching and steps down the voltage through a voltage divider resistor.

[0031] A negative voltage conditioning circuit is provided, connected to the voltage divider circuit. This circuit conditions a negative high-voltage pulse signal into a standard low-voltage negative pulse signal. In this embodiment, the negative voltage conditioning circuit includes a switching diode V1, which is reverse-biased to ensure the signal channel is a negative voltage channel. The circuit also includes resistors R5 and R8, and a capacitor C2. Resistors R5 and R8 are used for secondary voltage division and form an RC charging circuit with capacitor C2. Furthermore, the circuit includes a Schottky diode V2 and a 1V8 network, which limit the signal amplitude.

[0032] A positive voltage conditioning circuit, connected to the voltage divider circuit, is used to condition a positive high-voltage pulse signal into a standard low-voltage positive pulse signal. In this embodiment, the positive voltage conditioning circuit may include a switching diode V4, which is forward biased to ensure the signal channel is a positive voltage channel. The positive voltage conditioning circuit also includes resistors R14 and R17, a capacitor C9, and a resistor R18. Resistors R14 and R17 are used for secondary voltage division, and capacitor C9 and resistor R18 form an RC charging circuit. The positive voltage conditioning circuit also includes a Schottky diode V3, which is used to limit the signal amplitude.

[0033] A comparator, connected to the negative voltage conditioning circuit and the positive voltage conditioning circuit, is used to ensure the steepness of the edges of the negative pulse signal and the positive pulse signal;

[0034] An FPGA device is connected to the comparator. The FPGA device is used to acquire the characteristic information of the negative pulse signal and the positive pulse signal provided by the comparator, so as to determine the rising edge, falling edge, pulse width and pulse direction of the high voltage pulse signal.

[0035] The high-voltage positive and negative pulse detection circuit provided in this application uses a capacitor to block DC and an RC charging circuit designed with a resistor to maintain the width of the pulse signal; it combines a comparator to maintain the edge characteristics of the pulse signal, thereby realizing the identification of the rising and falling edges of the pulse signal; and it uses a rectifier diode to design a separate conditioning circuit for the positive and negative pulse signals, thereby realizing the identification of the signal pulse direction.

[0036] Meanwhile, the device can completely preserve the edge characteristics of high-voltage pulse signals and identify the pulse width characteristics of pulse signals; its application scope is no longer limited to signal direction, and it can simultaneously identify positive and negative high-voltage pulses.

[0037] The high-voltage positive and negative pulse detection circuit provided in this application will be described in detail below with reference to the accompanying drawings.

[0038] like Figure 1 As shown, the voltage divider circuit provided in this embodiment is responsible for attenuating the input pulse signal, the switching diode is responsible for rectification, and the positive and negative pulse signals are respectively input to the corresponding conditioning circuits. The charging circuit is responsible for maintaining the pulse width characteristics of the signal, and the comparator ensures the steepness of the signal edge, which can be recognized by FPGA.

[0039] Voltage divider circuit, such as Figure 2 As shown, the main function is to achieve 50Ω impedance matching and to step down the voltage using a voltage divider resistor.

[0040] Negative voltage conditioning circuit, such as Figure 3As shown, the reverse bias of the switching diode V1 ensures that the signal channel is a negative voltage channel. R5 and R8 form a secondary voltage divider and C2 to form an RC charging circuit, which ensures the signal pulse width characteristics. The Schottky diode V2 and the 1V8 network limit the signal amplitude, ensuring that the signal amplitude is not too large and will burn out the subsequent circuit.

[0041] Positive voltage conditioning circuit, such as Figure 4 As shown, the forward bias of the switching diode V4 ensures that the signal channel is a positive voltage channel, R14 and R17 form a secondary voltage divider, C9 and R18 form an RC charging circuit to ensure the signal pulse width characteristics, and the Schottky diode V3 limits the signal amplitude.

[0042] One comparator is used for both positive and negative pulse signals to ensure the steepness of the signal edges. Finally, the FPGA obtains the characteristic information of the pulse signal: rising edge, falling edge, pulse width, and pulse direction.

[0043] In summary, the high-voltage positive and negative pulse detection circuit provided in this application can handle uncertain high-voltage pulse signals and has diverse application scenarios. It can identify the edge characteristics, pulse width, and pulse direction of pulse signals, demonstrating outstanding signal processing capabilities.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments of this application.

[0046] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to the descriptions in the method embodiments. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A high-voltage positive and negative pulse detection circuit, characterized in that, include: A voltage divider circuit is used to step down the voltage of a high-voltage pulse signal; A negative voltage conditioning circuit is connected to the voltage divider circuit. The negative voltage conditioning circuit is used to condition the negative high voltage pulse signal into a standard low voltage negative pulse signal. A positive voltage conditioning circuit is connected to the voltage divider circuit. The positive voltage conditioning circuit is used to condition a positive high voltage pulse signal into a standard low voltage positive pulse signal. A comparator, connected to the negative voltage conditioning circuit and the positive voltage conditioning circuit, is used to ensure the steepness of the edges of the negative pulse signal and the positive pulse signal; An FPGA device is connected to the comparator. The FPGA device is used to acquire the characteristic information of the negative pulse signal and the positive pulse signal provided by the comparator, so as to determine the rising edge, falling edge, pulse width and pulse direction of the high voltage pulse signal.

2. The high-voltage positive and negative pulse detection circuit according to claim 1, characterized in that, The voltage divider circuit samples a 50Ω impedance for matching and uses a voltage divider resistor to reduce the voltage.

3. The high-voltage positive and negative pulse detection circuit according to claim 1, characterized in that, The negative voltage conditioning circuit includes a switching diode V1, which is reverse biased to ensure that the signal channel is a negative voltage channel.

4. The high-voltage positive and negative pulse detection circuit according to claim 3, characterized in that, The negative voltage conditioning circuit also includes resistors R5 and R8 and capacitor C2. Resistors R5 and R8 are used for secondary voltage division and together with capacitor C2 form an RC charging circuit.

5. The high-voltage positive and negative pulse detection circuit according to claim 3, characterized in that, The negative voltage conditioning circuit also includes a Schottky diode V2 and a 1V8 network, which are used to limit the signal amplitude.

6. The high-voltage positive and negative pulse detection circuit according to claim 1, characterized in that, The positive voltage conditioning circuit includes a switching diode V4, which is forward biased to ensure that the signal channel is a positive voltage channel.

7. The high-voltage positive and negative pulse detection circuit according to claim 6, characterized in that, The positive voltage conditioning circuit also includes resistors R14 and R17, capacitor C9 and resistor R18. Resistors R14 and R17 are used for secondary voltage division, and capacitor C9 and resistor R18 are used to form an RC charging circuit.

8. The high-voltage positive and negative pulse detection circuit according to claim 6, characterized in that, The positive voltage conditioning circuit also includes a Schottky diode V3; the Schottky diode V3 is used to limit the signal amplitude.

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