CN211554927U - Computer fault detection system - Google Patents
Computer fault detection system Download PDFInfo
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- CN211554927U CN211554927U CN202020249199.2U CN202020249199U CN211554927U CN 211554927 U CN211554927 U CN 211554927U CN 202020249199 U CN202020249199 U CN 202020249199U CN 211554927 U CN211554927 U CN 211554927U
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Abstract
The utility model discloses a computer fault detection system, including the computer to be detected who installs the detection software and the singlechip of connecting the computer to be detected, be provided with between computer to be detected and the singlechip and survey signal processing circuit, it includes AD converter and fortune ware U1, U2, U3 to survey signal processing circuit, the AD converter is connected the AD conversion interface of computer to be detected, fortune ware U1 utilizes emitter follower principle to amplify the sense signal after the AD converter conversion, adopt LC wave filter to carry out frequency-selective filtering to the sense signal after the emission follower amplifies, fortune ware U2 utilizes the integral fortune to put the principle with the signal feedback after the LC filtering to fortune ware U1, fortune ware U3 utilizes voltage follower principle to keep apart the output to the sense signal, guarantee that the singlechip can receive the sense signal steadily in succession, when the single chip microcomputer cannot receive the detection signal, the alarm circuit is driven to work, and fault detection is accurate and reliable.
Description
Technical Field
The utility model relates to a computer protection technology field especially relates to a computer fault detection system.
Background
With the application and popularization of computer multimedia technology and network information technology, people's life gradually develops towards intellectualization. The central computer control system is used as a centralized management control center for the application of computer multimedia and network information technology, and has the highest authority for management, so that the central control system is required to be in a safe and stable working environment. During the use process of the computer, the computer is often attacked by the outside of the internet, so that the computer is in failure.
The existing computer fault detection system adopts a single chip microcomputer to be connected with a computer to be detected and detect whether the computer is in fault or not, the computer to be detected can transmit a detection signal at a certain frequency after running detection software, the single chip microcomputer judges whether the computer is in fault or not according to whether the frequency of the detection signal is abnormal or not, however, interference exists at the interface of the single chip microcomputer and the detection computer, the transmission stability of the detection signal is influenced, and the fault detection of the computer is inaccurate.
So the utility model provides a new scheme to solve the problem.
Disclosure of Invention
In view of the above situation, in order to overcome the defects of the prior art, the present invention is directed to a computer fault detection system.
The technical scheme for solving the problem is as follows: a computer fault detection system comprises a computer to be detected and a single chip microcomputer, wherein detection software is installed on the computer to be detected, the single chip microcomputer is connected with the computer to be detected, a detection signal processing circuit is arranged between the computer to be detected and the single chip microcomputer, and the detection signal processing circuit comprises an A/D converter, an operational amplifier U1, an operational amplifier U2 and an operational amplifier U3; the A/D converter is connected with an A/D conversion interface of the computer to be tested, and an alarm circuit is arranged at the output end of the singlechip; the operational amplifier U1 amplifies the detection signal converted by the A/D converter by using the emitter follower principle, feeds the signal back to the operational amplifier U1 by the operational amplifier U2 after LC filtering, and finally isolates and outputs the processed detection signal to the single chip microcomputer by the operational amplifier U3 after voltage stabilization, and drives the alarm circuit to work when the single chip microcomputer does not receive the detection signal.
Furthermore, the inverting input terminal of the operational amplifier U1 is connected to the output terminal of the a/D converter through a resistor R1, the non-inverting input terminal of the operational amplifier U1 is connected to the output terminal of the operational amplifier U1 and the base of a transistor T1 through a resistor R3, the collector of the transistor T1 is connected to the +5V power supply, the emitter of the transistor T1 is connected to one end of an inductor L1, and is grounded through a resistor R4, the other end of the inductor L1 is respectively connected with one end of a capacitor C1 and the cathode of a voltage stabilizing diode DZ1, the output end of the operational amplifier U2 and the non-inverting input end of the operational amplifier U86523 are respectively connected with the input end of the single chip microcomputer through a resistor R2 and a resistor R5, the other end of the capacitor C1 is grounded, the non-inverting input end of the operational amplifier U2 is also respectively connected with the output end of the operational amplifier U2 and the non-inverting input end of the operational amplifier U1 through a capacitor C2, the anode of the zener diode DZ1 is connected with the non-inverting input end of the operational amplifier U3, and the inverting input end of the operational amplifier U3 is respectively connected with the output end of the operational amplifier U3 and the input end.
Further, the alarm circuit comprises an MOS tube Q1, the grid electrode of the MOS tube Q1 is connected with the output end of the single chip microcomputer and is grounded through a capacitor C4, the drain electrode of the MOS tube Q1 is connected with a +5V power supply through a resistor R6, and the source electrode of the MOS tube Q1 is grounded through a parallel LED lamp and an alarm.
Through the technical scheme, the beneficial effects of the utility model are that:
1. the utility model discloses carry out digital analog conversion to the sense signal that the software sent of listening to analog circuit handles the sense signal, avoids singlechip and the transfer of interference detection signal of listening computer kneck, effectively improves the precision that computer fault detected;
2. the LC filter is adopted to carry out frequency-selective filtering on the detection signal amplified by the emitter follower, so that clutter frequency interference is effectively eliminated, and the accuracy of the detection signal is greatly improved;
3. the LC filtered signal is fed back to the non-inverting input end of the operational amplifier U1 by the operational amplifier U2, and the capacitor C2 integrates the output signal of the operational amplifier U2, so that the detection signal output is more stable;
4. the operational amplifier U3 utilizes the voltage follower principle to carry out isolated output to the detection signal, and the capacitor C3 plays the effect of signal compensation, guarantees that the singlechip can receive the detection signal continuously and stably.
Drawings
Fig. 1 is a schematic diagram of the detection signal processing circuit of the present invention.
Fig. 2 is a schematic diagram of an alarm circuit of 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 fig. 1. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
A computer fault detection system comprises a computer to be detected and a single chip microcomputer, wherein detection software is installed on the computer to be detected, the single chip microcomputer is connected with the computer to be detected, a detection signal processing circuit is arranged between the computer to be detected and the single chip microcomputer, and the detection signal processing circuit comprises an A/D converter, an operational amplifier U1, an operational amplifier U2 and an operational amplifier U3; the A/D converter is connected with an A/D conversion interface of the computer to be tested, and an alarm circuit is arranged at the output end of the singlechip; the operational amplifier U1 amplifies the detection signal converted by the A/D converter by using the emitter follower principle, feeds the signal back to the operational amplifier U1 by the operational amplifier U2 after LC filtering, and finally isolates and outputs the processed detection signal to the single chip microcomputer by the operational amplifier U3 after voltage stabilization, and drives the alarm circuit to work when the single chip microcomputer cannot receive the detection signal.
The utility model discloses when using, at first install on the computer that awaits measuring and listen the software to send with certain frequency and listen the signal. In order to avoid the output of the detection signal from being interfered, an A/D converter is adopted to carry out digital-to-analog conversion on the detection signal, and then analog circuit processing is carried out.
As shown in FIG. 1, the inverting input terminal of the op-amp U1 is connected to the output terminal of the A/D converter through a resistor R1, wherein A/D in FIG. 1 represents the A/D converter; the non-inverting input end of the operational amplifier U1 is respectively connected with the output end of the operational amplifier U1 and the base electrode of the triode T1 through a resistor R3, and the collector electrode of the triode T1 is connected with a +5V power supply. An emitter of the triode T1 is connected with one end of an inductor L1 and is grounded through a resistor R4, the other end of the inductor L1 is respectively connected with one end of a capacitor C1 and a cathode of a zener diode DZ1, and is respectively connected with an inverting input terminal of an operational amplifier U1 and an inverting input terminal of an operational amplifier U2 through a resistor R2 and a resistor R5, the other end of the capacitor C1 is grounded, the inverting input terminal of the operational amplifier U2 is also respectively connected with an output terminal of the operational amplifier U2 and an non-inverting input terminal of the operational amplifier U1 through a capacitor C2, an anode of the zener diode DZ1 is connected with a non-inverting input terminal of the operational amplifier U3, and the inverting input terminal of the operational amplifier U3 is respectively connected with an output terminal of the operational amplifier.
The specific working principle of the analog circuit processing is as follows: the operational amplifier U1 and the transistor T1 form an emitter follower for fast amplifying the analog-to-digital converted detection signal. In order to reduce clutter interference, the inductor L1 and the capacitor C1 form an LC filter to perform frequency-selective filtering on the detection signal amplified by the emitter follower, so that clutter frequency interference is effectively eliminated, and the accuracy of the detection signal is greatly improved. In addition, the LC filtered signal is fed back to the non-inverting input end of the operational amplifier U1 by the operational amplifier U2, and the output signal of the operational amplifier U2 is integrated by the capacitor C2, so that the detection signal output is more stable. After the processing, the detection signal is sent to the operational amplifier U3 after being stabilized, the operational amplifier U3 utilizes the voltage follower principle to carry out isolated output on the detection signal, and the capacitor C3 plays a role in signal compensation, so that the singlechip can continuously and stably receive the detection signal.
As shown in fig. 2, the alarm circuit includes a MOS transistor Q1, the gate of the MOS transistor Q1 is connected to the output of the single chip microcomputer and is grounded through a capacitor C4, the drain of the MOS transistor Q1 is connected to a +5V power supply through a resistor R6, and the source of the MOS transistor Q1 is grounded through a parallel LED lamp and an alarm. When the singlechip can not receive the detection signal, the computer to be detected breaks down, and the singlechip output end outputs a high level signal to drive the grid of the MOS tube Q1 to be powered on, so that the LED lamp and the warning device are powered on to send out an audible and visual alarm signal to remind a user of timely overhauling.
To sum up, the utility model discloses carry out digital analog conversion to the sense signal that sends the software of listening to effectively eliminate clutter frequency interference after enlargeing and frequency-selective filtering, promoted the degree of accuracy of sensing the signal, utilize the integral to transport principle and voltage follower principle to handle the sense signal, guarantee that the singlechip can receive the sense signal steadily in succession, computer fault detection is accurate reliable.
The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (3)
1. The utility model provides a computer fault detection system, is including installing the computer that awaits measuring of detecting software and connecting the singlechip of computer that awaits measuring, its characterized in that: a detection signal processing circuit is arranged between the computer to be detected and the singlechip, and comprises an A/D converter, an operational amplifier U1, an operational amplifier U2 and an operational amplifier U3; the A/D converter is connected with an A/D conversion interface of the computer to be tested, and an alarm circuit is arranged at the output end of the singlechip; the operational amplifier U1 amplifies the detection signal converted by the A/D converter by using the emitter follower principle, feeds the signal back to the operational amplifier U1 by the operational amplifier U2 after LC filtering, and finally isolates and outputs the processed detection signal to the single chip microcomputer by the operational amplifier U3 after voltage stabilization, and drives the alarm circuit to work when the single chip microcomputer cannot receive the detection signal.
2. A computer fault detection system according to claim 1, wherein: the inverting input end of the operational amplifier U1 is connected with the output end of the A/D converter through a resistor R1, the non-inverting input end of the operational amplifier U1 is respectively connected with the output end of the operational amplifier U1 and the base electrode of a triode T1 through a resistor R3, the collector electrode of the triode T1 is connected with a +5V power supply, the emitter electrode of the triode T1 is connected with one end of an inductor L1, and is grounded through a resistor R4, the other end of the inductor L1 is respectively connected with one end of a capacitor C1 and the cathode of a voltage stabilizing diode DZ1, the output end of the operational amplifier U2 and the non-inverting input end of the operational amplifier U86523 are respectively connected with the input end of the single chip microcomputer through a resistor R2 and a resistor R5, the other end of the capacitor C1 is grounded, the non-inverting input end of the operational amplifier U2 is also respectively connected with the output end of the operational amplifier U2 and the non-inverting input end of the operational amplifier U1 through a capacitor C2, the anode of the zener diode DZ1 is connected with the non-inverting input end of the operational amplifier U3, and the inverting input end of the operational amplifier U3 is respectively connected with the output end of the operational amplifier U3 and the input end.
3. A computer fault detection system according to claim 2, wherein: the alarm circuit comprises an MOS tube Q1, the grid electrode of the MOS tube Q1 is connected with the output end of the single chip microcomputer and is grounded through a capacitor C4, the drain electrode of the MOS tube Q1 is connected with a +5V power supply through a resistor R6, and the source electrode of the MOS tube Q1 is grounded through a parallel LED lamp and a warning device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020249199.2U CN211554927U (en) | 2020-03-04 | 2020-03-04 | Computer fault detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020249199.2U CN211554927U (en) | 2020-03-04 | 2020-03-04 | Computer fault detection system |
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| Publication Number | Publication Date |
|---|---|
| CN211554927U true CN211554927U (en) | 2020-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020249199.2U Active CN211554927U (en) | 2020-03-04 | 2020-03-04 | Computer fault detection system |
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| Country | Link |
|---|---|
| CN (1) | CN211554927U (en) |
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2020
- 2020-03-04 CN CN202020249199.2U patent/CN211554927U/en active Active
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