CN110084073B - Computer security risk control system - Google Patents
Computer security risk control system Download PDFInfo
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- CN110084073B CN110084073B CN201910257455.4A CN201910257455A CN110084073B CN 110084073 B CN110084073 B CN 110084073B CN 201910257455 A CN201910257455 A CN 201910257455A CN 110084073 B CN110084073 B CN 110084073B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
- G06F21/71—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information
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Abstract
The invention discloses a computer safety risk control system, which comprises a frequency acquisition circuit, a feedback calibration circuit and a frequency selection compensation circuit, wherein the frequency acquisition circuit acquires signals at the input end of a signal transmission channel for receiving analog signals by a control terminal in the computer safety risk control system, the feedback calibration circuit utilizes a triode Q1, a capacitor C2 and a capacitor C3 to form a frequency modulation circuit to modulate the frequency of the signals, simultaneously utilizes a triode Q2, an inductor L1, an inductor L2, a capacitor C6 and a capacitor C7 to form an amplitude modulation circuit to modulate the frequency of the signals, finally utilizes a triode Q4, a triode Q5 and a capacitor C9 to form a constant current source circuit to stabilize the voltage and then input the constant current source circuit into the frequency selection compensation circuit, and finally utilizes a resistor R16-resistor R18 and a capacitor C12-capacitor C14 to form a frequency selection circuit to select single-frequency signal output, and can automatically modulate the frequency of the signals at the input end of the signal transmission channel for receiving analog signals by the control terminal in the computer safety And (4) calibrating and reducing signal errors.
Description
Technical Field
The invention relates to the technical field of circuits, in particular to a computer security risk control system.
Background
Along with the continuous development of science and technology, computers are more and more important, so that the computers become the core of a plurality of devices, the internal operation of the computers is automatically controlled according to programs compiled by people in advance, the industrial personal computer is a computer system which adopts a bus structure and detects and controls the production process, electromechanical devices and process equipment, the performance of the computers directly determines the operation performance of the related devices, and therefore, the safety risk control of the computers is needed, the safety risk control system of the computers is specially used for monitoring and controlling the operation of the computers and ensuring the good operation condition of the computers, however, in practical application, signals in the input end of a signal transmission channel for receiving analog signals by a control terminal in the safety risk control system of the computers also have faults in the transmission process, so that the signals often have frequency hopping, The attenuation phenomenon causes the analog signal received by the control terminal in the computer safety risk control system to exceed the signal error range, so that the computer safety risk control system makes wrong analysis or instruction, and the loss which is difficult to imagine is caused.
The present invention provides a new solution to this problem.
Disclosure of Invention
In view of the above situation, an object of the present invention is to provide a computer security risk control system, which has the characteristics of ingenious design and humanized design, and can automatically perform frequency modulation calibration on signals at the input end of a signal transmission channel for receiving analog signals at a control terminal in the computer security risk control system, thereby preventing the signals from frequency hopping and attenuation phenomena and reducing signal errors.
The technical scheme includes that the computer safety risk control system comprises a frequency acquisition circuit, a feedback calibration circuit and a frequency selection compensation circuit, wherein the frequency acquisition circuit acquires signals at the input end of a signal transmission channel for receiving analog signals at a control terminal in the computer safety risk control system, a clamping circuit consisting of a diode D2 and a diode D3 limits the signals to be 0- +5V and outputs the signals, the feedback calibration circuit utilizes a triode Q1, a capacitor C2 and a capacitor C3 to form a frequency modulation circuit to modulate the signals, simultaneously utilizes a triode Q2, an inductor L1, an inductor L2, a capacitor C6 and a capacitor C7 to form an amplitude modulation circuit to modulate the signals, and finally utilizes a triode Q4, a triode Q5 and a capacitor C9 to form a constant current source circuit to stabilize the voltage and input the constant current source circuit into the frequency selection compensation circuit, and utilizes a triode Q3, a silicon controlled rectifier VTL1, a frequency selection compensation circuit to detect the output signals of the constant, A voltage regulator tube D5 forms a composite circuit to screen out abnormal signals to be fed back to the collector of the triode Q2, the amplitude of the output signal of the amplitude modulation circuit is adjusted, and finally the frequency selection compensation circuit utilizes a resistor R16-resistor R18 and a capacitor C12-capacitor C14 to form a frequency selection circuit to screen out signal output with single frequency, namely a compensation signal of the input end signal of a signal transmission channel for receiving analog signals for a control terminal in a computer safety risk control system;
the feedback calibration circuit comprises a triode Q, the base electrode of the triode Q is connected with one end of a capacitor C, the collector electrode of the triode Q is connected with one ends of a resistor R and a capacitor C, the emitter electrode of the triode Q is connected with one ends of the resistor R and the resistor R, the other end of the resistor R is connected with the other end of the capacitor C and one end of the capacitor C, the other ends of the resistor R and the capacitor C are grounded, the other end of the resistor R is connected with +5V, the other end of the capacitor C is connected with the base electrode of the triode Q, the emitter electrode of the triode Q is connected with one ends of the resistor R and the capacitor C, the other ends of the resistor R and the capacitor C are grounded, the collector electrode of the triode Q is connected with an inductor L, one end of the resistor C and one end of a diode D, the other end of the resistor R is grounded, the other end of the, the other end of the inductor L2 is connected with one end of a resistor R22, a resistor R8, one end of a resistor R10 and one end of a capacitor C9, the other ends of the resistor R22 and the capacitor C6 are grounded, the other end of the resistor R8 is connected with the emitter of the triode Q4, the other end of the resistor R10 is connected with the anode of the diode D7, the base of the triode Q4 is connected with the cathode of the diode D7 and the collector of the triode Q5, the base of the triode Q5 is connected with the collector of the triode Q4 and the cathode of the regulator D6, the other end of the capacitor C9, the emitter of the triode Q5 is connected with one end of the resistor R9, the other end of the resistor R9 is connected with the anode of the regulator D6 and the cathode of the regulator D8, the resistor R14, one end of the capacitor C8, the other end of the capacitor C8 is grounded, the other end of the resistor R14 is connected with the collector of the triode Q3 and one end of the emitter of the resistor R15, the other end of the resistor R15 is connected with the power supply +5V, the base of, the negative electrode of the thyristor VTL1 is connected with one end of a resistor R13, the other end of the resistor R13 is connected with one end of a capacitor C11, the other end of the capacitor C11 is grounded, the control electrode of the thyristor VTL1 is connected with one end of a resistor R12, one end of a capacitor C10 and the anode of a voltage regulator tube D5, and the other ends of the resistor R12 and the capacitor C10 are connected with the anode of a diode D4.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages;
1, a frequency modulation circuit consisting of a triode Q1, a capacitor C2 and a capacitor C3 is used for modulating frequency of signals, the capacitor C2 and the capacitor C3 are bypass capacitors for filtering high-frequency signal noise, the capacitor C4 is a decoupling capacitor for filtering low-frequency signal noise, preventing signal frequency hopping and ensuring the stability of signal frequency, meanwhile, an amplitude modulation circuit consisting of a triode Q2, an inductor L1, an inductor L2, a capacitor C6 and a capacitor C7 is used for modulating the amplitude of the signals, the triode Q2 is used for amplifying the property of the triode to improve the amplitude of the signals, the capacitor C6 is charged and discharged to ensure the consistency of the amplitude of the signals and realize the amplitude modulation effect on the signals, the triode Q4, the triode Q5 and the capacitor C9 are used for forming a constant current source circuit and then are input into a frequency selection compensation circuit, a voltage regulator tube D6 is used for stabilizing the base of the triode Q5 and the collector potential of the triode Q4, the emitter, because the signal is easy to emit unstable signals after frequency modulation and amplitude modulation, the constant current source circuit is applied to stabilize the voltage and regulate the voltage, so that the consistency of the frequency and the amplitude of the signal can be ensured, and the static working point of the signal is stabilized;
2. in order to further detect the output signal of the constant current source circuit, a compound circuit consisting of a triode Q3, a silicon controlled rectifier VTL1 and a voltage regulator tube D5 is used for screening abnormal signals to be fed back to the collector of the triode Q2, when the signals are abnormal signals, the abnormal signal potential triggers the conduction of the silicon controlled rectifier VTL1 and feeds back signals to the potential of the collector of the triode Q2, so that the amplitude of the output signal of an amplitude modulation circuit is further adjusted for the signals, the consistency of the compensation signals and the source signals is ensured, a frequency selection circuit consisting of a resistor R16-a resistor R18 and a capacitor C12-a capacitor C14 is used for screening the signal output with single frequency, the frequency of the compensation signals is ensured to be stable, the frequency hopping of the signals is prevented, namely, the control terminal in a computer safety risk control system receives the compensation signals of the signals at the input end of a signal transmission channel for, reducing signal errors.
Drawings
Fig. 1 is a block diagram of a computer security risk control system according to the present invention.
Fig. 2 is a schematic diagram of a computer security risk control system according to the present invention.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings of fig. 1 to 2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
In a first embodiment, a computer security risk control system includes a frequency acquisition circuit, a feedback calibration circuit and a frequency selection compensation circuit, wherein the frequency acquisition circuit acquires signals at the input end of a signal transmission channel for receiving analog signals at a control terminal in the computer security risk control system, a clamping circuit consisting of a diode D2 and a diode D3 limits the signals to 0- +5V for output, the feedback calibration circuit uses a triode Q1, a capacitor C2 and a capacitor C3 to form a frequency modulation circuit to modulate the signals, a triode Q2, an inductor L1, an inductor L2, a capacitor C6 and a capacitor C7 to form an amplitude modulation circuit to modulate the signals, and finally uses a triode Q4, a triode Q5 and a capacitor C9 to form a constant current source circuit to stabilize the voltage and input the constant current source circuit into the frequency selection compensation circuit, and uses a triode Q3, a thyristor VTL1, a voltage selection compensation circuit to detect the output signals, A voltage regulator tube D5 forms a composite circuit to screen out abnormal signals to be fed back to the collector of the triode Q2, the amplitude of the output signal of the amplitude modulation circuit is adjusted, and finally the frequency selection compensation circuit utilizes a resistor R16-resistor R18 and a capacitor C12-capacitor C14 to form a frequency selection circuit to screen out signal output with single frequency, namely a compensation signal of the input end signal of a signal transmission channel for receiving analog signals for a control terminal in a computer safety risk control system;
the feedback calibration circuit utilizes a frequency modulation circuit consisting of a triode Q1, a capacitor C2 and a capacitor C3 to modulate frequency of signals, the capacitor C2 and the capacitor C3 are bypass capacitors to filter high-frequency signal noise, the capacitor C4 is a decoupling capacitor to filter low-frequency signal noise and prevent signal frequency hopping, the stability of signal frequency is ensured, meanwhile, a triode Q2, an inductor L1, an inductor L2, a capacitor C6 and a capacitor C7 are utilized to form an amplitude modulation circuit to modulate the amplitude of the signals, the triode Q2 is utilized to amplify the property of the triode to improve the amplitude of the signals, the capacitor C6 is charged and discharged to ensure the consistency of the amplitude of the signals and realize the amplitude modulation effect on the signals, the inductor L1, the inductor L2 and the capacitor C7 are utilized to filter noise waves in the signals, finally, the triode Q4, the triode Q5 and the capacitor C9 are utilized to form a constant current source, the circuit which is stabilized in voltage and then input into a frequency selection compensation circuit 573, the emitter potential of the triode Q5 is stabilized, the output signal of the constant current source circuit is stable, the signal is easy to emit unstable after frequency modulation and amplitude modulation, the constant current source circuit is used for stabilizing voltage and regulating the consistency of the frequency and the amplitude of the signal, the static working point of the signal is stabilized, in order to further detect the output signal of the constant current source circuit, a composite circuit consisting of the triode Q3, the controlled silicon VTL1 and the voltage regulator tube D5 is used for screening out abnormal signals and feeding back the abnormal signals to the collector of the triode Q2, when the signal is abnormal, the abnormal signal potential triggers the controlled silicon VTL1 to be conducted, the signal is fed back to the collector potential of the triode Q2, the amplitude value of the output signal of the amplitude modulation circuit is further regulated, and the consistency of the compensation signal and the source;
the feedback calibration circuit has a specific structure that the base of a triode Q is connected with one end of a capacitor C, the collector of the triode Q is connected with one ends of a resistor R and a capacitor C, the emitter of the triode Q is connected with one ends of the resistor R and the resistor R, the other end of the resistor R is connected with the other end of the capacitor C and one end of the capacitor C, the other ends of the resistor R and the capacitor C are grounded, the other end of the resistor R is connected with +5V, the other end of the capacitor C is connected with the base of the triode Q, the emitter of the triode Q is connected with one ends of the resistor R and the capacitor C, the other ends of the resistor R and the capacitor C are grounded, the collector of the triode Q is connected with an inductor L, a resistor C, one end of the resistor R and the cathode of a diode D, the other end of the resistor R is grounded, the other end of the inductor L is connected with one end of the, One end of a resistor R8, one end of the resistor R8 and one end of a capacitor C8, the other ends of the resistor R8 and the capacitor C8 are grounded, the other end of the resistor R8 is connected with an emitter of a transistor Q8, the other end of the resistor R8 is connected with an anode of a diode D8, a base of the transistor Q8 is connected with a cathode of the diode D8 and a collector of the transistor Q8, a base of the transistor Q8 is connected with a collector of the transistor Q8 and a cathode of the regulator D8, the other end of the capacitor C8 is grounded, the other end of the resistor R8 is connected with a collector of the transistor Q8 and one end of the resistor R8, the other end of the resistor R8 is connected with a +5V power supply, a base of the transistor Q8 is connected with an anode of the regulator D8, a cathode of the transistor Q8 is connected with an anode of the regulator L8, and an emitter of the thyristor D8 are connected with a cathode of the regulator L8 and the regulator L8. The negative electrode of the thyristor VTL1 is connected with one end of a resistor R13, the other end of the resistor R13 is connected with one end of a capacitor C11, the other end of the capacitor C11 is grounded, the control electrode of the thyristor VTL1 is connected with one end of a resistor R12, one end of a capacitor C10 and the anode of a voltage regulator tube D5, and the other ends of the resistor R12 and the capacitor C10 are connected with the anode of a diode D4.
In the second embodiment, on the basis of the first embodiment, the frequency selection compensation circuit uses a resistor R16-a resistor R18 and a capacitor C12-a capacitor C14 to form a frequency selection circuit to select a signal output with a single frequency, so as to ensure the stability of the frequency of a compensation signal and prevent signal frequency hopping, that is, a control terminal in a computer safety risk control system receives the compensation signal of an input end signal of a signal transmission channel for an analog signal, and uses a compensation signal mode to ensure the stability of signal transmission and reduce signal errors, one end of the resistor R16 is connected with the anode of a voltage regulator tube D6 and one end of a capacitor C12, the other end of the resistor R16 is connected with one end of a resistor R17 and one end of a capacitor C14, the other end of the resistor R17 is connected with a resistor R19, one end of the capacitor C13, the other end of the capacitor C12 is connected with one end of the resistor R18 and the other end of the capacitor C13, the other ends of the resistor R18 and the capacitor C14 are grounded, and the other end of the resistor R19 is connected with the signal output port.
Third embodiment, on the basis of the first embodiment, the frequency acquisition circuit selects a frequency collector J1 with model number SJ-ADC to acquire the signal at the input end of the signal transmission channel for the analog signal received by the control terminal in the computer security risk control system, and uses a clamping circuit composed of a diode D2 and a diode D3 to limit the signal to be output within 0- +5V, so as to prevent the signal from exceeding the adjustment range of the circuit, the power supply terminal of the frequency collector J1 is connected with a resistor R1, one end of a capacitor C1, the cathode of a diode D2 and a power supply +5V, the ground terminal of the frequency collector J1 is grounded, the output terminal of the frequency collector J1 is connected with a resistor R1, the other end of the capacitor C1 and one end of the resistor R2, the other end of the resistor R2 is connected with the cathode of the voltage regulator tube D1, the anode of the diode D2, the cathode of the diode D3 and the base of the triode Q1, and the anode of the diode D3 is grounded.
The invention relates to a computer safety risk control system, which comprises a frequency acquisition circuit, a feedback calibration circuit and a frequency selection compensation circuit, and is characterized in that the frequency acquisition circuit acquires signals in the input end of a signal transmission channel for receiving analog signals at a control terminal in the computer safety risk control system, a clamping circuit consisting of a diode D2 and a diode D3 limits the signals to be output in 0- +5V, the feedback calibration circuit utilizes a triode Q1, a capacitor C2 and a capacitor C3 to form a frequency modulation circuit to modulate the frequency of the signals, the capacitor C2 and the capacitor C3 are bypass capacitors to filter high-frequency signal noise, the capacitor C4 is a decoupling capacitor to filter low-frequency signal noise and prevent signal frequency hopping, and ensure the stability of the signal frequency, and simultaneously utilizes a triode Q2, an inductor L1, an inductor L2, a capacitor C6 and a capacitor C7 to form an amplitude modulation circuit to modulate the signals, the triode Q2 is used for amplifying the property of the triode to improve the signal amplitude, the capacitor C6 is charged and discharged to ensure the consistency of the signal amplitude and realize the amplitude modulation effect on the signal, the inductor L1, the inductor L2 and the capacitor C7 are used for filtering noise waves in the signal, finally the triode Q4, the triode Q5 and the capacitor C9 are used for forming a constant current source circuit to input the constant current source circuit into a frequency selection compensation circuit after voltage stabilization, a voltage stabilizing tube D6 is used for stabilizing the base electrode of the triode Q5 and the collector electrode potential of the triode Q4, namely stabilizing the emitter potential of the triode Q5 to ensure the output signal stability of the constant current source circuit, the signal is easy to emit unstable after frequency modulation and amplitude modulation, the consistency of the signal frequency and amplitude can be ensured after voltage stabilization regulation by the constant current source circuit, the signal static working point is stabilized, in order to further detect the output signal of the constant current source circuit, the triode Q3, the thyristor VTL1 and the collector D5, when the signal is an abnormal signal, the abnormal signal potential triggers the conduction of the silicon controlled rectifier VTL1, and the signal is fed back to the collector potential of the triode Q2, so that the amplitude of the output signal of the amplitude modulation circuit is further adjusted, the consistency of the compensation signal and the source signal is ensured, and finally, the frequency selection compensation circuit utilizes a frequency selection circuit consisting of a resistor R16-a resistor R18 and a capacitor C12-a capacitor C14 to select the signal output with single frequency, namely the compensation signal of the input end signal of the signal transmission channel for receiving the analog signal by the control terminal in the computer safety risk control system.
While the invention has been described in further detail with reference to specific embodiments thereof, it is not intended that the invention be limited to the specific embodiments thereof; for those skilled in the art to which the present invention pertains and related technologies, the extension, operation method and data replacement should fall within the protection scope of the present invention based on the technical solution of the present invention.
Claims (3)
1. A computer safety risk control system comprises a frequency acquisition circuit, a feedback calibration circuit and a frequency selection compensation circuit, and is characterized in that the frequency acquisition circuit acquires signals at the input end of a signal transmission channel for receiving analog signals at a control terminal in the computer safety risk control system, a clamping circuit consisting of a diode D2 and a diode D3 limits the signals to be 0- +5V for output, the feedback calibration circuit utilizes a triode Q1, a capacitor C2 and a capacitor C3 to form a frequency modulation circuit to modulate the signals, a triode Q2, an inductor L1, an inductor L2, a capacitor C6 and a capacitor C7 to form an amplitude modulation circuit to modulate the signals, and finally a triode Q4, a triode Q5 and a capacitor C9 are utilized to form a constant current source circuit to stabilize the voltage and then input the constant current source circuit into the frequency selection compensation circuit, and in order to detect the output signals of the constant current source circuit, the triode Q3, the silicon controlled rectifier VTL1, the, A voltage regulator tube D5 forms a composite circuit to screen out abnormal signals to be fed back to the collector of the triode Q2, the amplitude of the output signal of the amplitude modulation circuit is adjusted, and finally the frequency selection compensation circuit utilizes a resistor R16-resistor R18 and a capacitor C12-capacitor C14 to form a frequency selection circuit to screen out signal output with single frequency, namely a compensation signal of the input end signal of a signal transmission channel for receiving analog signals for a control terminal in a computer safety risk control system;
the feedback calibration circuit comprises a triode Q, the base electrode of the triode Q is connected with one end of a capacitor C, the collector electrode of the triode Q is connected with one ends of a resistor R and a capacitor C, the emitter electrode of the triode Q is connected with one ends of the resistor R and the resistor R, the other end of the resistor R is connected with the other end of the capacitor C and one end of the capacitor C, the other ends of the resistor R and the capacitor C are grounded, the other end of the resistor R is connected with +5V, the other end of the capacitor C is connected with the base electrode of the triode Q, the emitter electrode of the triode Q is connected with one ends of the resistor R and the capacitor C, the other ends of the resistor R and the capacitor C are grounded, the collector electrode of the triode Q is connected with an inductor L, one end of the resistor C and one end of a diode D, the other end of the resistor R is grounded, the other end of the, the other end of the inductor L2 is connected with one end of a resistor R22, a resistor R8, one end of a resistor R10 and one end of a capacitor C9, the other ends of the resistor R22 and the capacitor C6 are grounded, the other end of the resistor R8 is connected with the emitter of the triode Q4, the other end of the resistor R10 is connected with the anode of the diode D7, the base of the triode Q4 is connected with the cathode of the diode D7 and the collector of the triode Q5, the base of the triode Q5 is connected with the collector of the triode Q4 and the cathode of the regulator D6, the other end of the capacitor C9, the emitter of the triode Q5 is connected with one end of the resistor R9, the other end of the resistor R9 is connected with the anode of the regulator D6 and the cathode of the regulator D8, the resistor R14, one end of the capacitor C8, the other end of the capacitor C8 is grounded, the other end of the resistor R14 is connected with the collector of the triode Q3 and one end of the emitter of the resistor R15, the other end of the resistor R15 is connected with the power supply +5V, the base of, the negative electrode of the thyristor VTL1 is connected with one end of a resistor R13, the other end of the resistor R13 is connected with one end of a capacitor C11, the other end of the capacitor C11 is grounded, the control electrode of the thyristor VTL1 is connected with one end of a resistor R12, one end of a capacitor C10 and the anode of a voltage regulator tube D5, and the other ends of the resistor R12 and the capacitor C10 are connected with the anode of a diode D4.
2. The computer security risk control system of claim 1, wherein the frequency-selective compensation circuit comprises a resistor R16, one end of the resistor R16 is connected to the anode of the zener D6 and one end of a capacitor C12, the other end of the resistor R16 is connected to one end of a resistor R17 and one end of a capacitor C14, the other end of the resistor R17 is connected to one end of a resistor R19 and one end of a capacitor C13, the other end of the capacitor C12 is connected to one end of a resistor R18 and the other end of the capacitor C13, the other ends of the resistor R18 and the capacitor C14 are connected to ground, and the other end of the resistor R19 is connected to the signal output port.
3. The computer security risk control system of claim 1, wherein the frequency acquisition circuit comprises a frequency collector J1 with model number SJ-ADC, a power supply terminal of the frequency collector J1 is connected with a resistor R1, one end of a capacitor C1, a cathode of a diode D2 and a power supply +5V, a ground terminal of the frequency collector J1 is grounded, an output terminal of the frequency collector J1 is connected with a resistor R1, the other end of the capacitor C1 and one end of a resistor R2, the other end of the resistor R2 is connected with a cathode of a voltage regulator D1, an anode of the diode D2, a cathode of the diode D3 and a base of a triode Q1, an anode of the diode D3 is grounded, and an anode of the voltage regulator D1 is grounded.
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