Chassis detection system and detection server

Abstract

The embodiments of the present application relate to the field of circuits and provide a chassis detection system and a detection server, wherein the chassis detection system includes: a connector, a first cable and a second cable, the connector electrically connecting a working power supply and a ground terminal, the first cable electrically connecting the connector and a chassis to be detected, and the second cable electrically connecting the connector and the chassis to be detected; a detection module, the output end of the detection module outputs a test signal with a fixed duty cycle, and the output end is electrically connected to the connector; a first switch module, the first switch module electrically connecting the connector and the detection module and controlling the conduction between the connector and the detection module; a second switch module, the second switch module electrically connecting the connector and the detection module and controlling the conduction between the connector and the detection module, the connection port of the second switch module is different from the connection port of the first switch module, and by comparing the signals output and received by the detection module to determine whether the chassis to be detected is opened and whether the cable is connected, thereby better protecting the chassis.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of circuits, and in particular to a chassis detection system and a detection server. Background Art

[0002] Intrusion prevention system is a computer network security facility, which is a supplement to antivirus software and firewall. Intrusion prevention system is a computer network device that can monitor the network data transmission behavior of the network or network equipment, and can immediately interrupt, adjust or isolate some abnormal or harmful network data transmission behavior. Intrusion prevention system is to prevent network intrusion, while chassis is a way to prevent physical intrusion.

[0003] A detection switch is added to the upper cover of the chassis, and the detection switch is connected to the mainboard detection unit through a cable. However, this method may cause the cable to be not assembled or assembled poorly, or the cable and the mainboard detection unit to become loose and fall off during transportation, earthquakes, and other scenarios, resulting in the detection unit being unable to correctly identify whether the chassis has been invaded or misjudgment. Summary of the invention

[0004] The embodiments of the present application provide a chassis detection system and a detection server, which are at least beneficial to improving the accuracy of the judgment of the detection module, and then issuing the correct chassis status according to the current status of the chassis, so as to better protect the chassis.

[0005] According to some embodiments of the present application, the embodiments of the present application provide a chassis detection system, including: a connector, a first cable and a second cable, the connector electrically connected to a working power supply and a ground terminal, the first cable electrically connected to the connector and a chassis to be detected, and the second cable electrically connected to the connector and the chassis to be detected; a detection module, the output end of the detection module outputs a test signal with a fixed duty cycle, and the output end is electrically connected to the connector; a first switch module, the first switch module electrically connects the connector and the detection module and controls the conduction between the connector and the detection module; a second switch module, the second switch module electrically connects the connector and the detection module and controls the conduction between the connector and the detection module, and the connection port of the second switch module is different from the connection port of the first switch module.

[0006] In addition, the upper cover of the chassis to be inspected is provided with a normally open detection switch, and the normally open detection switch has a first end and a second end opposite to each other, the connector has a first port and a second port, and the first port is electrically connected to a working power supply, and the second port is electrically connected to a ground end, the first cable is used to electrically connect the first port and the first end, and the second cable is used to electrically connect the second port and the second end.

[0007] In addition, the first switch module has a first control end, a third port and a fourth port. The first control end is electrically connected to the working power supply. The first switch module enables conduction between the third port and the fourth port based on a signal from the first control end. The third port is electrically connected to the second port, the fourth port is electrically connected to the working power supply, and the fourth port is also electrically connected to the first acquisition end of the detection module.

[0008] In addition, the second switch module has a second control end, a fifth port and a sixth port, the second control end is electrically connected to the first port, the second switch module makes the fifth port and the sixth port conductive based on the signal of the second control end, the fifth port is grounded, the sixth port is electrically connected to the working power supply, and the sixth port is also electrically connected to the second acquisition end of the detection module.

[0009] In addition, it also includes: a first transient voltage suppression module, which is electrically connected between the second port and the ground terminal and is used to suppress transient high voltage.

[0010] In addition, the first transient voltage suppression module includes: a first diode, one end of the first diode is electrically connected to the second port, and the other end is electrically connected to the ground; a second resistor, the second port is electrically connected to the ground through the second resistor; a first capacitor, the first capacitor is connected in parallel with the second resistor.

[0011] In addition, it also includes: a second transient voltage suppression module, which is electrically connected between the working power supply and the connector and is used to suppress transient high voltage.

[0012] In addition, it is characterized in that the second transient voltage suppression module includes: a first resistor, the output end is electrically connected to the connector through the first resistor; two second diodes, the first resistor is electrically connected between the second diodes and the connector, wherein the positive electrode of one of the second diodes is electrically connected to the ground end, and the negative electrode of the second diode is connected to the positive electrode of another second diode and the first resistor; a third diode, the positive electrode of the third diode is electrically connected to the working power supply, and the negative electrode of the third diode is electrically connected to the negative electrode of another second diode.

[0013] In addition, it also includes: a third resistor, one end of which is electrically connected to the working power supply; a second capacitor, the other end of which is connected to one end of the second capacitor, and the other end of the second capacitor is electrically connected to the ground.

[0014] An embodiment of the present application also provides a detection server, including the above-mentioned chassis detection system.

[0015] The technical solution provided by the embodiment of the present application has at least the following advantages: a test signal with a fixed duty cycle is output through the output end of the detection module, and passes through the first port of the connector, the first cable, the first end of the normally open detection switch, the second end of the normally open detection switch, the second cable, the second port of the connector and the third port of the first switch module in sequence; based on the first control end of the first switch module and the test signal of the third port, the third port and the fourth port of the first switch module are controlled to be connected, so that the first acquisition end receives the first feedback signal, and the connection status of the cable, whether the detection switch is in place and whether the chassis cover is opened are judged by comparing the duty cycle of the first feedback signal and the duty cycle of the test signal; whether the fifth port and the sixth port are turned on is determined according to the signal of the second control end of the second switch module, and then a second feedback signal is provided to the second acquisition end, and then whether the chassis is opened is judged according to the signal of the second acquisition end, and whether the chassis is invaded is judged by judging the signals received by the first acquisition end and the second acquisition end, so as to better protect the chassis. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplifications do not constitute limitations on the embodiments. Unless otherwise stated, the pictures in the drawings do not constitute proportional limitations.

[0017] Figure 1 A circuit schematic diagram of a chassis detection system provided in one embodiment of the present application;

[0018] Figure 2 A circuit schematic diagram of another chassis detection system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0019] As known from the background technology, currently, the method of using the mainboard detection unit is prone to misjudgment, which not only fails to achieve the alarm function, but also increases unnecessary workload.

[0020] To solve the above problems, the present application provides a chassis detection system, which determines whether the chassis is opened and whether the cables are connected normally by judging the signals received by the first acquisition end and the second acquisition end respectively, thereby more accurately determining the specific circumstances of the abnormality.

[0021] The following will describe the various embodiments of the present application in detail with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the various embodiments of the present application, many technical details are provided in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solution claimed in the present application can be implemented.

[0022] Figure 1 is a circuit schematic diagram of a chassis detection system corresponding to an embodiment of the present application, Figure 2 A circuit schematic diagram of another chassis detection system provided in an embodiment of the present application.

[0023] refer to Figure 1 The chassis detection system includes: a connector 110, a first cable 120 and a second cable 130, the connector 110 is electrically connected to a working power supply Vcc and a ground terminal, the first cable 120 is electrically connected to the connector 110 and a chassis to be detected, and the second cable 130 is electrically connected to the connector 110 and the chassis to be detected; a detection module 140, an output end 5 of the detection module 140 outputs a test signal with a fixed duty cycle, and the output end 5 is electrically connected to the connector 110; a first switch module Q1, the first switch module Q1 is electrically connected to the connector 110 and the detection module 140 and controls the conduction between the connector 110 and the detection module 140; a second switch module Q2, the second switch module Q2 is electrically connected to the connector 110 and the detection module 140 and controls the conduction between the connector 110 and the detection module 140, and the connection port of the second switch module Q2 is different from the connection port of the first switch module Q1.

[0024] Specifically, the upper cover of the chassis to be detected is provided with a normally open detection switch 100, and the normally open detection switch 100 has a first end 1 and a second end 2 relative to each other, the connector 110 has a first port 3 and a second port 4, and the first port 3 is electrically connected to the working power supply Vcc, the second port 4 is electrically connected to the ground end, the first cable 120 is used to electrically connect the first port 3 and the first end 1, and the second cable 130 is used to electrically connect the second port 4 and the second end 2.

[0025] The first switch module Q1 has a first control terminal 6, a third port 7 and a fourth port 8. The first control terminal 6 is electrically connected to the working power supply Vcc. The first switch module Q1 enables conduction between the third port 7 and the fourth port 8 based on the signal of the first control terminal 6. The third port 7 is electrically connected to the second port 4, the fourth port 8 is electrically connected to the working power supply Vcc, and the fourth port 8 is also electrically connected to the first acquisition terminal 9 of the detection module 140.

[0026] The second switch module Q2 has a second control terminal 10, a fifth port 11 and a sixth port 12. The second control terminal 10 is electrically connected to the first port 3. The second switch module Q2 conducts between the fifth port 11 and the sixth port 12 based on the signal of the second control terminal 10. The fifth port 11 is grounded, the sixth port 12 is electrically connected to the working power supply Vcc, and the sixth port 12 is also electrically connected to the second acquisition terminal 13 of the detection module 140.

[0027] Specifically, the duty cycle refers to the proportion of the power-on time to the total time in a pulse cycle.

[0028] The first switch module Q1 includes an NMOS (N-Metal-Oxide-Semiconductor) tube, and the second switch module Q2 includes an NMOS tube. In some embodiments, the first switch module Q1 can also connect a diode in series between the third port 7 and the fourth port 8, and the anode of the diode is connected to the fourth port 8, and the cathode of the diode is connected to the third port 7. The second switch module Q2 can also connect a diode in series between the fifth port 11 and the sixth port 12, and the anode of the diode is connected to the fifth port 11, and the cathode of the diode is connected to the sixth port 12.

[0029] When the first switch module Q1 and the second switch module Q2 are NMOS tubes, the first control terminal 6 corresponds to the gate of the NMOS tube, the third port 7 corresponds to the drain of the NMOS tube, the fourth port 8 corresponds to the source of the NMOS tube, the second control terminal 10 corresponds to the gate of the NMOS tube, the fifth port 11 corresponds to the source of the NMOS tube, and the sixth port 12 corresponds to the drain of the NMOS tube.

[0030] Taking a test signal with a fixed duty cycle of 30% as an example, taking the test signal outputting a high level first and then a low level as an example, when the test signal is at a high level, the test signal passes through the first port 3 of the connector 110, the first cable 120, the first end 1 of the normally open detection switch 100, the second end 2 of the normally open detection switch 100, the second cable 130 and the second port 4 of the connector 110 in sequence, and gives a high level to the third port 7 of the first switch module Q1, so the first switch module Q1 is not turned on, and the first acquisition terminal 9 is connected to the working power supply Vcc, so the first acquisition terminal 9 is at a high level. When the test signal is at a low level, the first switch module Q1 is turned on, so the signal received by the first acquisition terminal 9 is at a low level. Therefore, the fixed duty cycle of the signal waveform received by the first acquisition terminal 9 is the same as the fixed duty cycle of the signal waveform output by the output terminal 5 of the detection module 140. If the fixed duty cycle of the signal waveform output by the output terminal 5 is consistent with the fixed duty cycle of the signal waveform received by the first acquisition terminal 9, it is deemed that the cable is connected in place and the chassis is not opened.

[0031] When the chassis is not opened, the second port 4 of the connector 110 is connected to the ground, and the low level is transmitted through the second port 4, the second cable 130, the second end 2, the first end 1, the first cable 120 and the first port 3 to the second control end 10 of the second switch module Q2. The second switch module Q2 is not turned on, and the second acquisition end 13 is connected to the working power supply Vcc. The received signal is a high level. When the chassis is opened, the second control end 10 of the second switch module Q2 receives a high level, and the second switch module Q2 is turned on. Since the fifth port 11 of the second switch module Q2 is grounded, the second acquisition end 13 is a low level. The chassis is opened, which is regarded as being invaded, and an alarm is issued through the detection module 140.

[0032] The first switch module Q1 cooperates with the second switch module Q2 to more accurately determine abnormal situations.

[0033] refer to Figure 2 In some embodiments, a first transient voltage suppression module 150 is further included. The first transient voltage suppression module 150 is electrically connected between the second port 4 and the ground terminal to suppress transient high voltage.

[0034] The first transient voltage suppression module 150 may include: a first diode D1, one end of the first diode D1 is electrically connected to the second port 4, and the other end is electrically connected to the ground; a second resistor R2, the second port 4 is electrically connected to the ground through the second resistor R2; a first capacitor C1, the first capacitor C1 is connected in parallel with the second resistor R2.

[0035] In some embodiments, the resistance of the second resistor R2 can be greater than or equal to 10kΩ, for example, 10kΩ; the capacitance of the first capacitor C1 can be less than 0.1μF, for example, 0.001μF. It can be understood that the resistance of the second resistor R2 and the capacitance of the first capacitor C1 can be selected according to the needs of the actual circuit, and different resistors and capacitors can be selected, and the interference signal can be filtered out by connecting the first capacitor C1 in parallel at both ends of the second resistor R2.

[0036] In some embodiments, when the first switch module Q1 changes from on to off, the first diode D1 quickly discharges the current on the first switch module Q1, thereby protecting the first switch module Q1 by eliminating the self-inductance potential generated by the first switch module Q1 at the moment of power failure.

[0037] In some embodiments, a second transient voltage suppression module 160 is further included. The second transient voltage suppression module 160 is electrically connected between the working power supply Vcc and the first port 3 to suppress transient high voltage.

[0038] The second transient high voltage suppression module 160 may include: a first resistor R1, the output end 5 is electrically connected to the first port 3 through the first resistor R1; two second diodes D2, the first resistor R1 is electrically connected between the second diodes D2 and the first port 3, wherein the anode of one second diode D2 is electrically connected to the ground, and the cathode of the second diode D2 is electrically connected to the anode of another second diode D2 and the first resistor R1; a third diode D3, the anode of the third diode D3 is electrically connected to the working power supply Vcc, and the cathode of the third diode D3 is electrically connected to the cathode of another second diode D2.

[0039] In some embodiments, the resistance of the first resistor R1 can be less than or equal to 2kΩ, for example, 1kΩ. When the resistance of the first resistor R1 is 1kΩ and the resistance of the second resistor R2 is 10kΩ, taking the high voltage output by the output terminal 5 as 3.3V as an example, the first resistor R1 and the second resistor R2 are divided into two voltages. From the resistance ratio of the first resistor R1 to the second resistor R2 of 1:10, it can be seen that the voltage of the second resistor R2 is 3V. Taking the voltage of Vcc as 3.3V as an example, the voltage of the first control terminal 6 of the first switch module Q1 is 3.3V, the voltage of the third port 7 is 3V, the first switch module Q1 is not turned on, and the first acquisition terminal 9 is connected to the working When the first control terminal 6 of the first switch module Q1 is connected to the power supply Vcc, the received electrical signal is high level. When the output terminal 5 outputs low level, the voltage of the first control terminal 6 of the first switch module Q1 is 3.3V, the voltage of the third port 7 is 0V, the first switch module Q1 is turned on, and the electrical signal received by the first acquisition terminal 9 is low level. Therefore, when the output terminal 5 outputs high voltage, the electrical signal received by the first acquisition terminal 9 is high level. When the output terminal 5 outputs low level, the electrical signal received by the first acquisition terminal 9 is low level. By comparing the duty cycle of the electrical signal received by the first acquisition terminal 9 with the duty cycle of the electrical signal output by the output terminal 5, the connection status of the cable and the opening and closing status of the chassis can be judged. It can be understood that the resistance values ​​of the first resistor R1 and the second resistor R2 can be selected according to the specific voltage division requirements. The transient high voltage generated at the moment of power-on can be prevented from affecting the working power supply Vcc.

[0040] In some embodiments, a third resistor R3 is also included, one end of the third resistor R3 is electrically connected to a working power supply Vcc; a second capacitor C2, the other end of the third resistor R3 is electrically connected to one end of the second capacitor C2, and the other end of the second capacitor C2 is electrically connected to the ground, and the third resistor R3 and the second capacitor C2 cooperate to filter out interference signals.

[0041] The resistance of the third resistor R3 can be greater than or equal to 10kΩ, for example, 100kΩ. When the resistance of the second resistor R2 is 10kΩ, the resistance of the third resistor R3 is 100kΩ, and the working power supply Vcc provides a voltage of 3.3V, the voltage at the second control end 10 of the second switch module Q2 is the same as the voltage at both ends of the second resistor R2. When the cable is connected and the chassis is not opened, the second resistor R2 and the third resistor R3 are divided. From the resistance ratio of the second resistor R2 to the third resistor R3 of 1:10, it can be seen that the second resistor R 2 is 0.3V, that is, the voltage of the second control terminal 10 is 0.3V, the voltage of the sixth port 12 is 3.3V, the second switch module Q2 is not turned on, the second acquisition terminal 13 is connected to the working power supply Vcc, and the received electrical signal is high level. When the chassis is opened, the second control terminal 10 receives a high level, the second switch module Q2 is turned on, and since the fifth port 11 is electrically connected to the ground terminal, the second acquisition terminal 13 receives a low level. By judging the electrical signal of the second acquisition terminal 13, it is judged whether the chassis is opened. It can be understood that the resistance value of the third resistor R3 can be selected according to the specific voltage division requirements. The capacitance of the second capacitor C2 can be less than or equal to 0.1μF, for example, 0.01μF.

[0042] In some embodiments, it also includes a fourth resistor R4, and the second control terminal 10 is connected to the first port 3 through the fourth resistor R4; a fifth resistor R5, and the fourth port 8 is electrically connected to the first collection terminal 9 through the fifth resistor R5; a sixth resistor R6, and the output terminal 5 is electrically connected to the first port 3 through the sixth resistor R6; a seventh resistor R7, and the sixth port 12 is electrically connected to the second collection terminal 13 through the seventh resistor R7, and the fourth resistor R4, the fifth resistor R5, the sixth resistor R6 and the seventh resistor R7 are used to achieve signal matching.

[0043] In some embodiments, the resistance values ​​of the fourth resistor R4, the fifth resistor R5, the sixth resistor R6 and the seventh resistor R7 may all be less than or equal to 33Ω, and the anti-interference capability may be improved by reducing the resistance values ​​of the fourth resistor R4, the fifth resistor R5, the sixth resistor R6 and the seventh resistor R7.

[0044] In some embodiments, it also includes: an eighth resistor R8, the second collection terminal 13 is electrically connected to the working power supply Vcc through the eighth resistor R8; a ninth resistor R9, the first collection terminal 9 is electrically connected to the working power supply Vcc through the ninth resistor R9; a tenth resistor R10, the first control terminal 6 is electrically connected to the working power supply Vcc through the tenth resistor R10, the electrical signal provided by the working power supply Vcc to the second collection terminal 13 is fixed to a high level through the eighth resistor R8, the electrical signal provided by the working power supply Vcc to the first collection terminal 9 is fixed to a high level through the ninth resistor R9, and the electrical signal provided by the working power supply Vcc to the first control terminal 6 is fixed to a high level through the tenth resistor R10.

[0045] The resistance of the eighth resistor R8 can be less than or equal to 10kΩ, for example, 4.7kΩ, the resistance of the ninth resistor R9 can be less than or equal to 10kΩ, for example, 4.7kΩ, and the resistance of the tenth resistor R10 can be less than or equal to 10kΩ, for example, 4.7kΩ. It can be understood that the selection of the resistance values ​​of the eighth resistor R8, the ninth resistor R9, and the tenth resistor R10 can be considered from the aspects of driving capability and power consumption, circuit driving requirements, high and low level settings, frequency characteristics, etc.

[0046] The embodiment of the present application outputs a test signal with a fixed duty cycle through the output terminal 5 of the detection module 140, and transmits the signal back to the first acquisition terminal 9 of the detection module 140 via the connector 110, the first cable 120, the normally open detection switch 100, the second cable 130 and the first switch module Q1. By comparing the signal received by the first acquisition terminal 9 with the test signal output by the output terminal 5, it is determined whether the first cable 120 and the second cable 130 are in place and whether the chassis is opened. By determining the signal transmitted to the second acquisition terminal 13 of the detection module 140 via the second switch module Q2, it is determined whether the chassis is opened. The specific situation of the abnormality can be determined more accurately through the indication of the two signals, thereby better protecting the chassis and internal information.

[0047] The present application also provides a detection server, including the above-mentioned chassis detection system.

[0048] Those skilled in the art can understand that the above-mentioned embodiments are specific examples for implementing the present application, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present application. Any person skilled in the art can make their own changes and modifications without departing from the spirit and scope of the present application, so the scope of protection of the present application shall be based on the scope defined in the claims.

Claims

1. A chassis detection system, characterized in that: include: A connector, a first cable and a second cable, wherein the connector is electrically connected to a working power supply and a ground terminal, the first cable is electrically connected to the connector and a chassis to be detected, and the second cable is electrically connected to the connector and the chassis to be detected; A detection module, wherein an output end of the detection module outputs a test signal with a fixed duty cycle, and the output end is electrically connected to the connector; A first switch module, the first switch module electrically connects the connector and the detection module and controls conduction between the connector and the detection module; a second switch module, the second switch module electrically connects the connector and the detection module and controls conduction between the connector and the detection module, and a connection port of the second switch module is different from a connection port of the first switch module; The upper cover of the chassis to be detected is provided with a normally open detection switch, and the normally open detection switch has a first end and a second end opposite to each other, the connector has a first port and a second port, and the first port is electrically connected to a working power supply, and the second port is electrically connected to a ground end, the first cable is used to electrically connect the first port and the first end, and the second cable is used to electrically connect the second port and the second end; The first switch module has a first control end, a third port and a fourth port, the first control end is electrically connected to the working power supply, the first switch module makes the third port and the fourth port conductive based on the signal of the first control end, the third port is electrically connected to the second port, the fourth port is electrically connected to the working power supply, and the fourth port is also electrically connected to the first acquisition end of the detection module; The second switch module has a second control end, a fifth port and a sixth port. The second control end is electrically connected to the first port. The second switch module makes the fifth port and the sixth port conductive based on the signal of the second control end. The fifth port is grounded, the sixth port is electrically connected to the working power supply, and the sixth port is also electrically connected to the second acquisition end of the detection module.

2. The chassis detection system according to claim 1, characterized in that: Also includes: A first transient voltage suppression module is electrically connected between the second port and the ground terminal and is used to suppress transient high voltage.

3. The chassis detection system according to claim 2, characterized in that: The first transient voltage suppression module comprises: a first diode, wherein one end of the first diode is electrically connected to the second port, and the other end of the first diode is electrically connected to the ground; a second resistor, wherein the second port is electrically connected to the ground terminal through the second resistor; A first capacitor is connected in parallel with the second resistor.

4. The chassis detection system according to claim 1, characterized in that: Also includes: A second transient voltage suppression module is electrically connected between the working power supply and the connector and is used for suppressing transient high voltage.

5. The chassis detection system according to claim 4, characterized in that: The second transient voltage suppression module includes: a first resistor, the output end being electrically connected to the connector through the first resistor; Two second diodes, the first resistor is electrically connected between the second diodes and the connector, the anode of one of the second diodes is electrically connected to the ground, and the cathode of the second diode is connected to the anode of another second diode and the first resistor; A third diode, wherein an anode of the third diode is electrically connected to the working power supply, and a cathode of the third diode is electrically connected to a cathode of another second diode.

6. The chassis detection system according to claim 1, characterized in that: Also includes: a third resistor, one end of which is electrically connected to the working power supply; A second capacitor, the other end of the third resistor is connected to one end of the second capacitor, and the other end of the second capacitor is electrically connected to the ground.

7. A detection server, characterized in that: It comprises a chassis detection system as described in any one of claims 1 to 6 above.

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