CN115576771A - Computing device - Google Patents

Abstract

The embodiment of the application discloses a computing device, which comprises a liquid leakage detection circuit, at least one liquid leakage induction circuit and at least one server node; each server node is provided with at least one liquid leakage sensing circuit, a liquid leakage detection circuit is connected with each liquid leakage sensing circuit, and the liquid leakage detection circuit is positioned on the outer side of the server node; the liquid leakage detection circuit is used for outputting a corresponding detection signal according to the state of the liquid leakage induction circuit, and the detection signal is used for indicating whether liquid leakage occurs in the server node. According to the embodiment of the application, the liquid leakage detection circuit is located on the outer side of the server node, so that when liquid leakage occurs on the server node, the liquid leakage detection circuit can output correct detection signals according to the state of the liquid leakage induction circuit, and therefore the accuracy and the reliability of a liquid leakage detection result can be guaranteed.

Description

Computing device

Technical Field

The present application relates to the field of servers, and more particularly, to a computing device.

Background

Each device (such as a processor) in the server generates heat during operation, and if the temperature is too high, the operation efficiency of the device may be reduced and even the device may be burnt out. Therefore, when the server operates, the related heat dissipation technology is needed to dissipate heat of the server.

Liquid cooling heat dissipation has become the mainstream server heat dissipation scheme due to the advantages of high heat dissipation efficiency, low noise, low energy consumption and the like. The liquid cooling heat dissipation is mainly to carry out heat dissipation and temperature reduction through circulating flow of cooling liquid. However, the cooling liquid used by the liquid cooling server generally has a conductive property, such as water. If liquid leakage occurs in the liquid cooling pipeline or the liquid cooling radiator, the liquid cooling may be immersed in each chip (such as a processor) or Printed Circuit Board (PCB) in the server, which may cause the chip or PCB to work abnormally, resulting in abnormal server function, and even serious liquid leakage may cause problems such as short circuit of circuit, damage of components, and the like. Therefore, how to effectively detect the leakage of the server node is a concern of technicians.

Disclosure of Invention

The embodiment of the application discloses a computing device, can detect the weeping condition of server node effectively to, when the server node takes place the weeping, also can guarantee the accuracy and the reliability of weeping testing result, thereby can in time report an emergency and ask for help or increased vigilance.

A first aspect discloses a computing device comprising a leakage detection circuit, at least one leakage sensing circuit, and at least one server node; each server node is provided with at least one liquid leakage induction circuit, the liquid leakage detection circuit is connected with each liquid leakage induction circuit, and the liquid leakage detection circuit is positioned at the outer side of the server node; the liquid leakage sensing circuit is used for generating state change under the condition that liquid leakage occurs in the server node, the liquid leakage detection circuit is used for outputting corresponding detection signals according to the state of the liquid leakage sensing circuit, and the detection signals are used for indicating whether liquid leakage occurs in the server node or not.

In the embodiment of the application, a leakage sensing circuit can be arranged on each server node of the computing device, so that the passive design of a leakage detection function in the server node can be realized, and the leakage detection circuit can be arranged on the outer side of the server node. Therefore, when the server node leaks, the leakage detection circuit cannot be influenced, and therefore the leakage detection circuit can output correct detection signals according to the state of the leakage induction circuit, accuracy and reliability of leakage detection results can be guaranteed, and timely warning can be carried out when the node leaks.

As a possible embodiment, the leakage detection circuit comprises an analog-to-digital converter having at least one input pin and at least one signal detection circuit; each liquid leakage sensing circuit is connected to one input pin of the analog-to-digital converter through one signal detection circuit; the signal detection circuit is used for outputting a corresponding electric signal according to the state of the liquid leakage induction circuit; the analog-to-digital converter is used for performing analog-to-digital conversion on the electric signal and outputting the detection signal.

In the embodiment of the application, each signal detection circuit can output a corresponding electric signal according to the state of the corresponding leakage sensing circuit, and the analog-to-digital converter can perform analog-to-digital conversion on the electric signal and output a corresponding detection signal. Therefore, the liquid leakage condition of the server node can be effectively detected.

As a possible embodiment, the detection signal includes a first signal and a second signal, and each of the leakage sensing circuits includes a first line and a second line; the first circuit is connected with the signal detection circuit, and the second circuit is grounded; under the condition that the server node is not leaked, the impedance between the first line and the second line is a first impedance, the analog-to-digital converter outputs the first signal, and the first signal is used for indicating that the server node is not leaked; in the case of liquid leakage of the server node, the impedance between the first line and the second line is a second impedance, the analog-to-digital converter outputs the second signal, the second signal is used for indicating liquid leakage of the server node, and the first impedance is larger than the second impedance.

In the embodiment of the present application, when a server node is leaked or not leaked, the impedance between the first line and the second line may change, and accordingly, the detection signal output by the analog-to-digital converter may also change. In the event of a server node leak, the analog-to-digital converter may output a first signal. The analog-to-digital converter may output a second signal in the event that the server node is not weeping. Thus, whether the server node is leaked or not can be determined by detecting whether the analog-to-digital converter outputs the first signal or the second signal.

As a possible implementation, the voltage value of the first signal is twice the voltage value of the second signal.

In the embodiment of the application, the voltage value of the first signal may be twice that of the second signal, so that the first signal and the second signal may be accurately distinguished, and whether the server node is leaked or not may be accurately determined.

As a possible implementation manner, each of the signal detection circuits includes a first resistor, one end of the first resistor is connected to one of the leakage sensing circuit and one input pin of the analog-to-digital converter, and the other end of the first resistor is used for connecting to a power supply.

In the embodiment of the application, the voltage can be divided through the first resistor, so that the signal detection circuit can output different electric signals when the server node leaks or does not leak, and whether the server node leaks or not can be judged according to the electric signals.

As a possible implementation, each of the leakage sensing circuits further includes a second resistor, wherein the second line is grounded through the second resistor.

As a possible implementation, the computing device further includes a liquid leakage warning circuit, the liquid leakage warning circuit being connected to the liquid leakage detection circuit; the liquid leakage warning circuit is used for determining whether to carry out warning according to the detection signal output by the liquid leakage detection circuit.

In the embodiment of the application, the liquid leakage warning circuit can determine whether to give an alarm according to the detection signal output by the liquid leakage detection circuit, so that related personnel can be timely notified to process under the condition of liquid leakage, and further equipment in the server node can be prevented from being damaged.

As a possible implementation manner, the liquid leakage warning circuit comprises a processing unit and a warning indicator light, wherein the processing unit is connected with the liquid leakage detection circuit and the warning indicator light; the processing unit is used for judging whether the server node leaks liquid or not according to the detection signal and controlling the alarm indicator lamp to alarm according to the judgment result.

In the embodiment of the application, the processing unit can judge whether the server node leaks according to the detection signal, and can control the alarm indicator lamp to alarm under the condition of judging the leakage, so that related personnel can be informed in time to process the leakage fault, and the damage of equipment in the server node is avoided.

As one possible implementation, the computing device is a liquid-cooled rack server.

As a possible implementation, the liquid-cooled complete cabinet server includes a cabinet management board, and the liquid leakage detection circuit is disposed on the cabinet management board.

In the embodiment of the application, the leakage detection circuit can be arranged on the cabinet management board, and at the moment, original components or processors of the cabinet management board can be utilized, so that the cost of overall leakage detection can be saved.

The second aspect discloses a liquid leakage detection method, which can be applied to a computing device (such as a whole cabinet server) and also applied to a module (e.g., a chip) in the computing device. The method comprises the following steps: the liquid leakage warning circuit determines whether the first node has liquid leakage according to a detection signal corresponding to the first node output by the liquid leakage detection circuit, wherein the first node is any node in the computing device; and under the condition that the first node is determined to have liquid leakage, the liquid leakage warning circuit gives a warning.

As a possible implementation, the determining whether the first node is leaked according to the detection signal corresponding to the first node output by the leakage detection circuit includes: determining a voltage value corresponding to the first node according to the detection signal corresponding to the first node; determining that the first node has no leakage when the voltage value is larger than a first threshold value; and determining that the first node is leaked under the condition that the voltage value is less than or equal to the first threshold value.

A third aspect discloses a computer-readable storage medium having stored thereon a computer program or computer instructions which, when executed, implement the leakage detection method as disclosed in the above aspects.

A fourth aspect discloses a chip comprising a processor for executing a program stored in a memory, which program, when executed, causes the chip to perform the method of leakage detection as disclosed in the above aspects.

As a possible implementation, the memory is located off-chip.

A fifth aspect discloses a computer program product comprising computer program code which, when executed, causes the method of leakage detection disclosed in the above aspects to be performed.

It is to be understood that, for the beneficial effects of the liquid leakage detection method provided by the second aspect, the computer-readable storage medium provided by the third aspect, the chip provided by the fourth aspect, and the computer program product provided by the fifth aspect, reference may be made to the corresponding beneficial effects of the computing apparatus disclosed by the first aspect, and details are not repeated here.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1A is a schematic structural diagram of a cabinet system disclosed in an embodiment of the present application;

fig. 1B is a schematic structural diagram of another rack system disclosed in the embodiment of the present application;

fig. 1C is a schematic structural diagram of another rack system disclosed in the embodiment of the present application;

FIG. 2 is a schematic diagram of a system architecture disclosed in an embodiment of the present application;

FIG. 3 is a schematic flow chart of a method for detecting liquid leakage according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of a result of a liquid leakage detection disclosed in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a processing unit according to an embodiment of the present application.

Detailed Description

The embodiment of the application discloses a computing device, which can effectively detect the liquid leakage condition of a server node and can alarm in time when the liquid leakage occurs in the server node. The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

For better understanding of the embodiments of the present application, the related art of the embodiments of the present application will be described below.

With the progress of computer technology, the functions and performances of servers are continuously improved and perfected, and the server plays more and more important roles in the fields of cloud computing, data centers, big data and the like. In which each device (e.g., processor) in the server generates heat during operation, and if the temperature is too high, the operating efficiency of the device may be reduced or even the device may be burned out. Therefore, when the server operates, the related heat dissipation technology is needed to dissipate heat of the server.

The server heat dissipation mode mainly includes wind cooling heat dissipation and liquid cooling heat dissipation, wherein the liquid cooling heat dissipation becomes a mainstream server heat dissipation scheme due to the advantages of high heat dissipation efficiency, low noise, low energy consumption and the like. Through liquid cooling heat dissipation, overheating faults of devices such as a Central Processing Unit (CPU) and a Graphic Processing Unit (GPU) of the server can be avoided, and accordingly normal operation of the server can be guaranteed.

The liquid cooling heat dissipation is mainly to carry out heat dissipation and temperature reduction through circulating flow of cooling liquid. Specifically, liquid cooling server generally can be provided with liquid cooling pipeline and liquid cooling radiator (generally set up on the device that generates heat) etc. in server inside, and the coolant liquid can flow through the liquid cooling radiator through the liquid cooling pipeline, can absorb the heat that devices such as CPU gived off when the coolant liquid passes through the liquid cooling radiator, then can take away the heat through the flow of coolant liquid to reach the effect of cooling.

The cooling liquid used by the liquid cooling server generally has a conductive property, such as water. Therefore, if liquid leakage occurs in the liquid-cooled pipes or the liquid-cooled heat sinks, the liquid coolant may be immersed in each chip (such as CPU, GPU, etc.) or Printed Circuit Board (PCB) in the server, which may cause the chip or PCB not to work normally, cause abnormal server function, and cause serious liquid leakage, even short circuit, component damage, etc. Also, if the server is disposed in a cabinet, server leakage may also affect adjacent server nodes in the cabinet. In order to solve the above problems, the server generally performs the leakage detection and the leakage alarm reporting process, so as to find and process the leakage problem of the server in time. Under the general condition, a liquid leakage detection circuit can be arranged in the server, the liquid leakage detection circuit can detect the liquid leakage condition of the server in real time, and when the liquid leakage of the liquid cooling pipeline or the liquid cooling radiator is detected, the liquid leakage condition can be reported in time and the power failure can be timely realized through a Base Management Controller (BMC) of the server.

However, for the liquid cooling server of the entire cabinet or a single-node liquid cooling server (e.g., a single server node disposed in the cabinet), each server node is provided with an independent liquid leakage detection circuit and an alarm reporting circuit, and the liquid leakage detection circuit, the alarm reporting circuit, and the server function circuit are disposed in one server node. If liquid leakage occurs in a liquid cooling pipeline or a liquid cooling radiator in a server node, the liquid leakage detection circuit, the alarm reporting circuit and the server function circuit in the node may be abnormal at the same time, so that the problems that the liquid leakage detection result is inaccurate, the liquid leakage fault cannot be reported in time and the like may occur, and the liquid leakage problem of the server node cannot be handled in time.

In order to solve the above problem, an embodiment of the present application provides a liquid leakage detection apparatus, which may include a liquid leakage detection circuit, at least one liquid leakage sensing circuit, and at least one server node. Each server node can be provided with at least one leakage sensing circuit, the leakage detection circuit is connected with each leakage sensing circuit, and the leakage detection circuit can be located on the outer side of the server node. In the case of liquid leakage at a server node, a liquid leakage sensing circuit in the server node may generate a state change (e.g., an impedance change), and a liquid leakage detection circuit may output a corresponding detection signal (e.g., a voltage signal or a current signal) according to the state of the liquid leakage sensing circuit, where the detection signal may be used to indicate whether liquid leakage occurs at the server node.

Specifically, the leakage sensing circuit in each node may include two signal lines (L1 and L2), one end of the line L1 may be connected to one input channel of an analog-to-digital converter (ADC) in the leakage detection circuit outside the node, and may be pulled up to the VDD voltage through a pull-up resistor in each input channel. One end of the line L2 can be directly grounded or grounded through a pull-down resistor, so that a passive design of a liquid leakage detection function in a node can be realized. The impedance between the lines L1 and L2 changes when the node leaks, so that the lines L1 and L2 can convert the node leakage into impedance change, and the impedance change between the lines L1 and L2 can cause the electrical signal of the analog-to-digital converter corresponding to the input channel to change (such as a voltage signal or a current signal), and the analog-to-digital converter performs analog-to-digital conversion on the electrical signal and outputs a digital detection signal. Therefore, whether the server node corresponding to the input channel leaks or not can be determined through the detection signal corresponding to the input channel output by the analog-to-digital converter, the leakage of the server node does not affect the accuracy of the leakage detection result, and the leakage alarm circuit and the like are not abnormal, so that the server leakage fault can be reported in time, the power failure and other processing can be carried out in time, and the reliability of leakage detection can be further ensured.

It will be appreciated that to facilitate management and deployment of the servers, the servers will typically be centrally stacked on a server rack. Referring to fig. 1A, fig. 1A is a schematic structural diagram of a rack system according to an embodiment of the present disclosure. As shown in fig. 1A, the rack system may include: cabinet 100, liquid leakage detection module 101, and at least one server node, i.e., node 1, \8230;, node N103, as shown in fig. 1A, disposed in cabinet 100. N is a positive integer greater than 0, for example, 8 server nodes, 16 server nodes, etc. may be included in the cabinet 100. The server node may be any type of node, such as a computing node, a storage node, and the like, and is not limited herein. In some embodiments, the Server node may be a file Server (file Server), a database Server (database Server), a mail Server (mail Server), a Web Server (Web Server), a multimedia Server (multimedia Server), a communication Server (communication Server), a terminal Server (terminal Server), an infrastructure Server (infrastructure Server), or the like. Furthermore, the server may not be limited to adopting an X86 architecture, a Reduced Instruction Set Computer (RISC) architecture, an advanced reduced instruction set machine (ARM) architecture, or the like.

In a possible implementation manner, the rack system shown in fig. 1A is a whole rack server, and the whole rack server is a server that is delivered and deployed with one rack as a minimum granularity, and has the advantages of high density, easiness in large-scale deployment, and the like.

In this application embodiment, the heat dissipation mode that N server nodes in the rack adopted can be for the liquid cooling heat dissipation, and weeping detection module 101 can be used for detecting the weeping condition of server node, when detecting a certain node weeping, can report an emergency and ask for help or increased vigilance through processing unit 10111, reports the weeping condition to upper management instrument.

As seen in fig. 1A, each server node in the cabinet 100 may be provided with a leakage sensing circuit (e.g., leakage sensing circuit 1021 of node 1 102, and leakage sensing circuit 1031 of node N103). In the event of a liquid leak at a server node, a state change (e.g., an impedance change) may be generated by a liquid leak sensing circuit within the server node.

The leak detection module 101 may include a leak detection circuit 1012. The leakage detection circuitry 1012 may be connected with the leakage sensing circuitry of each server node, and the leakage detection circuitry 1012 may be located outside of the server nodes. The liquid leakage detection circuit 1012 may output a detection signal (e.g., a voltage signal or a current signal) corresponding to a server node according to a state of the liquid leakage sensing circuit of the server node, where the detection signal may be used to indicate whether liquid leakage occurs in the server node.

In some embodiments, the liquid leakage detection circuit 1012 may include an analog-to-digital converter 10121 and N signal detection circuits, which are in one-to-one correspondence with the liquid leakage sensing circuits of N server nodes (i.e., N server nodes), such as the liquid leakage sensing circuit 1021 at node 1 corresponding to the signal detection circuit 10122, and the liquid leakage sensing circuit 1031 at node N103 corresponding to the signal detection circuit 10123. Moreover, the leakage sensing circuit of each node may be connected to its corresponding signal detection circuit, and each signal detection circuit may be connected to one input channel (i.e., one input pin) of the analog-to-digital converter 10121, so that the N input channels of the analog-to-digital converter 10121 may correspond to the N server nodes one to one. It can be seen that each leakage sensing circuit may be connected to one input pin of the analog-to-digital converter 10121 through one signal detection circuit. The signal detection circuit may be configured to output a corresponding electrical signal according to a state of a corresponding leakage sensing circuit, and then the analog-to-digital converter may be configured to output a corresponding detection signal according to the electrical signal (i.e., perform analog-to-digital conversion on the electrical signal and output a corresponding detection signal).

Specifically, one leakage sensing circuit may include two signal lines (i.e., a first line L1 and a second line L2), wherein one end of the line L2 may be connected to one end of one resistor (i.e., a second resistor, such as a pull-down resistor R1 in the node 1 102 and a pull-down resistor R2 in the node N103), and the other end of the resistor may be grounded. One end of the line L1 may be connected to one of the signal detection circuits 1012 in the liquid leakage detection circuit. As shown in fig. 1A, each signal detection circuit may include a resistor (i.e., a first resistor, such as a pull-up resistor R3 in the signal detection circuit 10123 and a pull-up resistor R4 in the signal detection circuit 10122), one end of which may be connected to one input channel of the analog-to-digital converter 10121 and the line L1 corresponding to the leakage sensing circuit, respectively, and the other end of which may be connected to a power supply, which provides a voltage VDD. It should be understood that the first resistor and the second resistor may be used for voltage division, so that the ADC may be caused to output different detection signals when the server node is drained and not drained.

It is understood that the values of the pull-down resistors in each server node may be the same or different, for example, the values of the resistor R1 in the node 1 102 and the resistor R2 in the node N103 may be the same or different. The resistance values of the pull-up resistors in each signal detection circuit may be the same or different, for example, the resistance values of the pull-up resistor R3 in the signal detection circuit 10123 and the resistance value of the resistor R4 in the signal detection circuit 10122 may be the same or different. Moreover, the resistance of the pull-down resistor in any one of the server nodes may be the same as or different from the resistance of the pull-up resistor corresponding to any one of the input channels, for example, the resistances of the resistor R1 and the resistor R4 may be the same or different.

The leakage detection module 101 may also include a leakage warning circuit 1011. The liquid leakage warning circuit 1011 may be configured to determine whether to perform warning based on the detection signal output from the liquid leakage detecting circuit 1012. Specifically, the liquid leakage warning circuit 1011 may determine whether liquid leakage occurs in a server node (e.g., a first node) according to a detection signal corresponding to the server node output by the liquid leakage detection circuit 1012, and may perform a warning when it is determined that liquid leakage occurs. The first node may be any one of the N server nodes. Specifically, the liquid leakage warning circuit 1011 may include a processing unit 10111, and communication between the processing unit 10111 and the analog-to-digital converter 10121 may be performed. The processing unit 10111 may be configured to determine whether the corresponding server node is leaking according to the detection signal output by the leakage detection circuit 1012. Specifically, the processing unit 10111 may obtain a detection signal corresponding to any one of the input channels of the analog-to-digital converter 10121, and then may determine whether liquid leakage occurs at a corresponding node according to the detection signal corresponding to each input channel. In some embodiments, the analog-to-digital converter 10121 may detect a voltage signal of each input channel, may determine a voltage value corresponding to each input channel, and may then output a corresponding detection signal according to the voltage value, which may be used to indicate the voltage value. Accordingly, the processing unit 10111 may determine the voltage value of the corresponding node according to the detection signal corresponding to each input channel, and then determine whether the corresponding node has a liquid leakage according to the voltage value, and report liquid leakage information (e.g., the node where the liquid leakage occurs, the time when the liquid leakage is detected, etc.) to an upper management tool when the liquid leakage occurs, for example, the relevant liquid leakage information may be displayed on a user interface (e.g., a Web interface), so that an administrator may process the liquid leakage information in time. In some embodiments, to avoid leakage causing damage to devices within the node, the processing unit 10111 may control the node where leakage occurs to be powered down.

In some embodiments, the liquid leakage warning circuit 1011 may further include a warning indicator lamp 10112 (i.e., the warning lamp shown in fig. 1A), the warning indicator lamp 10112 and the processing unit 10111 being connected to each other. The processing unit 10111 may also be configured to control the alarm indicator light 10112 to alarm according to the determination result of whether the server node has liquid leakage. Specifically, in a case where the processing unit 10111 determines that there is a node where liquid leakage occurs among the N server nodes, the processing unit 10111 may control the alarm indicator lamp 10112 to alarm. For example, the warning indicator light 10112 may be controlled to illuminate or flash for a long time. It is understood that in other embodiments of the present application, the liquid leakage alarming circuit 1011 may further include a buzzer, and the buzzer and the processing unit 10111 are connected to each other. In the case where the processing unit 10111 determines that there is a node where liquid leakage occurs among the N server nodes, the processing unit 10111 may control the buzzer to sound long or sound short at intervals.

In a possible implementation manner, the communication manner adopted between the processing unit 10111 and the analog-to-digital converter 10121 may include, but is not limited to, an inter-integrated circuit (I2C) bus, a Serial Peripheral Interface (SPI) bus, and other communication manners.

It should be noted that when no leakage occurs at the node, the impedance between the lines L1 and L2 may be a first impedance, which is usually relatively large and may be in the order of mega (M) ohms, and when leakage occurs at the node, the impedance between the lines L1 and L2 may be a second impedance, and at this time, the lines L1 and L2 may be shorted by the leaked coolant, and the impedance may be reduced to the order of thousand (K) ohms, which may be generally several K ohms. Thus, the change of the impedance between the lines L1 and L2 causes the electrical signal of the input channel of the analog-to-digital converter 10121 to change, so that the leakage can be determined by monitoring the change of the electrical signal (e.g., voltage signal) of each input channel of the analog-to-digital converter 10121, and the specific leakage node can be determined. In some embodiments, the detection signal may include a first signal and a second signal. In the case of a node that is not leaking, the impedance between lines L1 and L2 may be a first impedance, and in this case, the analog-to-digital converter may output a first signal, which may be used to indicate that the node is not leaking. In the case of node leakage, the impedance between lines L1 and L2 may be a second impedance, at which time the analog-to-digital converter may output a second signal that may be indicative of the node leakage. The voltage value corresponding to the first signal may be twice the voltage value corresponding to the second signal.

In some embodiments, lines L1 and L2 in the weep induction circuit may be two signal lines in a water immersion rope sensor. The water logging rope sensor can set up along the liquid cooling pipeline route in the server node to in order can detect the weeping condition of optional position in the node, avoid appearing the condition of missed measure.

In one possible implementation, the water immersion rope sensor outer layer comprises a water absorbent material and the inner layer comprises a metal wire (such as lines L1 and L2 described above). When the liquid cooling pipeline or the liquid cooling radiator does not leak, the impedance between the inner layer metal wires L1 and L2 of the water immersion rope sensor is very large, which is equivalent to a disconnected state. When the liquid cooling pipeline or the liquid cooling radiator leaks, the outer water-absorbing material can absorb the cooling liquid, and the cooling liquid has the conductive characteristic, so that the inner metal wires L1 and L2 of the water immersion rope sensor can be in short circuit.

Taking the node 1 102 as an example, when no liquid leakage occurs in the liquid cooling pipe or the liquid cooling heat sink in the node 1 102, the impedance between the lines L1 and L2 is large, which means that the line L1 is floating, and the voltage divided by the resistor R4 is almost 0, so that the voltage of the input channel 1 detected by the analog-to-digital converter 10121 is about VDD. When liquid leakage occurs in a liquid cooling pipeline or a liquid cooling radiator in the node 1 102, the lines L1 and L2 are short-circuited through cooling liquid, the impedance can be reduced to several K ohms, and if the resistances of the resistor R1 in the node 1 102 and the resistor R4 in the leakage detection module 101 are several tens of K ohms, the resistor R4 will be divided to about 1/2VDD, and the voltage of the channel 1 detected by the analog-to-digital converter 10121 is also about 1/2VDD.

It is noted that the processing unit 10111 may be a processor, which may be a Central Processing Unit (CPU), a Complex Programmable Logic Device (CPLD), a general-purpose processor, a digital signal processor, an application specific integrated circuit (asic), a Field Programmable Gate Array (FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof.

In some embodiments, the leakage detection module 101 may include a BMC, and the processing unit 10111 may be the BMC. In still other embodiments, the leakage detection module 101 may include a CPLD and a BMC, and the processing unit 10111 may include the CPLD and the BMC. It is to be appreciated that the BMC may be configured to perform component management, asset management, etc. of the node, supporting remote management (e.g., server reset, power up and power down, etc.) via a management portal. In this embodiment of the application, when the processing unit 10111 is a BMC, the BMC may monitor a liquid leakage condition of each server node, and when a certain server node has a liquid leakage, the BMC may report related information (such as a node where the liquid leakage occurs, a time when the liquid leakage is detected, and the like) to an upper management tool through a Simple Network Management Protocol (SNMP), a Simple Mail Transfer Protocol (SMTP), a Redfish protocol, and the like, so that related personnel may handle the liquid leakage in time, and influence on a service is reduced.

It is understood that a whole rack server may generally include a Rack Management (RM) board, which may also be referred to as a rack management controller or a rack management unit. The RM board may be used to monitor, manage, etc. the entire cabinet system, including managing power in the cabinet. Therefore, in the case that the cabinet system shown in fig. 1A is a complete cabinet server, the leakage detection module 101 may be integrated on an RM board, and the processing unit 10111 may be an original component or processor of the RM board, so that the cost of the overall leakage detection may be saved. Meanwhile, the RM management board does not need high heat dissipation efficiency generally and can be an air cooling component, so that the timeliness and the reliability of leakage detection and alarm reporting can be improved.

In one possible implementation, the rack system shown in fig. 1A further includes a power shelf (power shelf), and the RM board may be disposed in the power shelf.

In the above solution, a leakage sensing circuit is disposed at each server node, and the leakage sensing circuit may include lines L1 and L2. One end of the line L2 may be pulled down to the ground through a resistor, and one end of the line L1 may be connected to the leakage detection circuit 1012 in the leakage detection module 101 through a cable, so as to implement a passive design of the in-node leakage detection function. The liquid leakage detection module 101 is provided with a liquid leakage detection circuit 1012 and a liquid leakage alarm circuit 1011, so that liquid leakage detection and alarm of each node can be realized. Meanwhile, the liquid leakage detection circuit 1012 and the liquid leakage warning circuit 1011 can be independent of each node, so that the node liquid leakage can be avoided from causing the faults or the abnormalities of the liquid leakage detection circuit 1012 and the liquid leakage warning circuit 1011, and the accuracy and the reliability of the node liquid leakage detection can be improved. In addition, in the above scheme, there are at least 1 signal line from each server node to the liquid leakage detection module 101, which can minimize the signal connection between the node and the liquid leakage detection module 101. In addition, the leakage detection efficiency of the cabinet system can be improved by the way of performing centralized detection on the leakage conditions of all the nodes through one leakage detection circuit 1012 and one leakage alarm circuit 1011.

It should be noted that, the main inventive concept of the present application is to implement a passive leakage detection design at each server node, and a leakage sensing circuit may be provided only at each server node. The actual detection of liquid leakage and the alarm through the liquid leakage alarm circuit 1011 are realized through the liquid leakage detection circuit 1012 outside the server node, so that even if liquid leakage occurs in the server node, the detection and alarm of the liquid leakage are not affected. Therefore, the solution for detecting leakage shown in fig. 1A is only one possible implementation manner of the present application, and may actually include more modified circuits, and the embodiments of the present application are not limited herein. For example, as shown in fig. 1B, the resistor R1 in the node 1 may also be disposed in the signal detection circuit 10122 of the leakage detection module 101, and the resistor R2 in the node N103 may also be disposed in the signal detection circuit 10123 of the leakage detection module 101, in this case, the N input channels of the analog-to-digital converter 10121 may be respectively connected to the N leakage sensing circuits through the N third resistors (e.g., the resistor R1 and the resistor R2 in fig. 1B). Thus, when the node has no leakage and has leakage, the voltages of the input channels detected by the analog-to-digital converter 10121 may also be different, so that whether leakage occurs at the corresponding node can be determined according to the detected voltages. For another example, as shown in fig. 1C, the resistors R1 and R2 shown in fig. 1B and 1A may be directly removed, so that when a node is not leaked and when a node is leaked, voltages of input channels detected by the ADC may also be different, so as to determine whether leakage occurs at the corresponding node according to the detected voltages.

In some embodiments, a backplane, a switch, and other components are also disposed in the rack system shown in fig. 1A or fig. 1B. Specifically, as shown in fig. 2, a backplane 2011 and a switch 2012 may be included in the cabinet system 201. Also, each node in the cabinet may include an interface that may be used to transmit electrical signals. In this embodiment, the interface may be connected to a line L1 in the leakage sensing circuit by means of a PCB trace, and the interface may also be connected to an interface of the leakage detecting module 101 by a cable. In this way, the interface of each node is connected to the interface of the liquid leakage detection module 101 through cable convergence, and connection between the line L1 in the liquid leakage sensing circuit in the node and the liquid leakage detection circuit 1012 can be achieved. In some embodiments, when the weep detection module 101 is integrated on the RM board, the interface of the weep detection module 101 may be an interface of the cabinet RM board.

As shown in fig. 2, the liquid leakage detection module 101 and any one of the nodes may further include a BMC-Gigabit Ethernet (GE) interface, and the BMC-GE interface may be connected to the GE interface of the switch 2012 through a backplane 2011. The switch 2012 may also include a 10GE interface, and the 10GE interface may be coupled to the network 202, and the management tool 203 may also be coupled to the network 202, so that communication between the management tool 203 and the BMC-GE interface may be achieved. It will be appreciated that the BMC-GE interface is a BMC management portal for the server node that may be used to communicate with the upper management tool 203 (i.e., BMC out-of-band management software or management system). The BMC out-of-band management software may be presented in a web program or a desktop Application (APP), and may provide various monitoring and management functions, so that relevant persons may conveniently know the operating state of the server and perform remote control on the server, and the like.

It should be understood that the rack systems shown in fig. 1A, 1B, and 2 may also include components such as a Power Distribution Unit (PDU) that may provide power distribution for devices such as the in-rack servers.

The architectures shown in fig. 1A, 1B, 1C, and 2 are merely exemplary and are not intended to limit the present invention. In other embodiments of the present application, the architectures depicted in FIGS. 1A, 1B, 1C, and 2 can include more or fewer devices than those illustrated.

Based on the above system architecture, please refer to fig. 3, and fig. 3 is a schematic flow chart of a liquid leakage detection method disclosed in the embodiment of the present application. As shown in fig. 3, the method for detecting leakage may include, but is not limited to, the following steps:

301. the processing unit acquires voltage values of the input channels detected by the analog-to-digital converter.

Specifically, the analog-to-digital converter may detect voltage values of N input channels thereof in real time, and may transmit the detected voltage values of the N input channels to the processing unit. Wherein each input channel may correspond to a server node. For example, in fig. 1A, node 1 corresponds to input channel 1 of the analog-to-digital converter, and node N corresponds to input channel N of the analog-to-digital converter.

In some embodiments, the analog-to-digital converter and the processing unit may communicate with each other through an I2C bus, and at this time, the processing unit may obtain the voltage value of each input channel detected by the analog-to-digital converter according to the I2C protocol.

302. The processing unit determines whether leakage occurs in the corresponding node according to the voltage value of each input channel, and may execute step 303 if no leakage occurs, and may execute step 304 if leakage occurs, and may send an alarm message to the upper management tool.

It can be understood that when no leakage occurs and leakage occurs in a node, the impedance between the lines L1 and L2 in the leakage sensing circuit in the node is different, and when the impedance changes, the voltage value detected by the analog-to-digital converter corresponding to the input channel also changes. Therefore, after the processing unit acquires the voltage values of the input channels of the analog-to-digital converter, the processing unit can judge whether liquid leakage occurs in the corresponding nodes according to the voltage values of the input channels.

Specifically, when no leakage occurs at a node, the impedance between the lines L1 and L2 in the leakage sensing circuit in the node is very large and much larger than the resistance of the pull-up resistor in the leakage detection module, the voltage divided by the pull-up resistor in the leakage detection module is almost 0, and the voltage value of the input channel corresponding to the node detected by the analog-to-digital converter is about VDD. When leakage occurs in a node, a line L1 and a line L2 in a leakage sensing circuit in the node are in short circuit through leakage, the impedance is reduced and can be reduced to K ohm level, at the moment, a pull-up resistor in a leakage detection module can divide a part of voltage, and the divided voltage is related to the resistance value of the pull-up resistor in the leakage detection module, the resistance value of the pull-down resistor in the node, the category of cooling liquid, the characteristics of a leakage sensor (such as the water immersion rope sensor) and the like. For example, assuming that the resistance of the pull-up resistor in the leakage detection module and the resistance of the pull-down resistor in the node are 50K ohms, when leakage occurs at the node, the impedance between the lines L1 and L2 is 3K ohms, and according to ohm's law, the voltage divided by the pull-up resistor in the leakage detection module is 50/103VDD, which is about 1/2VDD.

Based on the change of the voltage values corresponding to the input channels before and after liquid leakage, the processing unit may compare the voltage value of each input channel with the first threshold, and may determine that liquid leakage does not occur in the server node corresponding to one input channel when the voltage value corresponding to the input channel is greater than the first threshold, and may execute step 303. In a case that the voltage value corresponding to an input channel is less than or equal to the first threshold, it may be determined that liquid leakage occurs in the server node corresponding to the input channel, and step 304 may be performed.

The size of the first threshold value can be determined according to the resistance value of a pull-up resistor in the leakage detection module, the resistance value of a pull-down resistor in a node, the category of cooling liquid and the characteristics of the leakage sensor, so that the accuracy of leakage judgment can be improved. For example, assuming that the resistance of the pull-up resistor in the leakage detection module and the resistance of the pull-down resistor in the node are 50K ohms, and when leakage occurs at the node, the impedance between the lines L1 and L2 is 3K ohms, the first threshold may be set to 3/4VDD.

For example, assume node 1 corresponds to adc input channel 1, node 2 corresponds to adc input channel 2, node 3 corresponds to adc input channel 3, \8230:, and node N corresponds to adc input channel N. The first threshold is 3/4VDD. As shown in fig. 4, when the voltage value of the input channel 1 detected by the analog-to-digital converter is VDD, the processing unit may determine that the detected voltage value is greater than the first threshold, so that it may be determined that the node 1 is in a normal state and no liquid leakage occurs, and thus, an alarm may not be issued. When the voltage value of the input channel 2 detected by the analog-to-digital converter is 1/2VDD, the processing unit may determine that the detected voltage value is smaller than the first threshold, and may determine that liquid leakage occurs at the node 2, and thus, may issue an alarm. When the voltage value of the input channel N detected by the analog-to-digital converter is VDD, the processing unit may determine that no leakage occurs at the node N, and thus, an alarm may not be issued.

303. And the processing unit continuously monitors the leakage condition of the node.

When the processing unit determines that the voltage value corresponding to one input channel is greater than the first threshold, it may be determined that no liquid leakage occurs in the server node corresponding to the input channel, and then, the processing unit may continue to monitor the liquid leakage of the node, that is, continue to monitor the voltage value of the input channel corresponding to the node.

304. And the processing unit processes according to a preset strategy.

When the processing unit determines that the voltage value corresponding to one input channel is less than or equal to the first threshold, it may be determined that liquid leakage occurs in the server node corresponding to the input channel, and then, the processing unit may perform corresponding processing according to a preset policy.

In some embodiments, when the processing unit determines that a certain node has liquid leakage, the processing unit may control the alarm indicator light to be on or flash for alarming, and may control the node to be powered off, so as to avoid damage to components (such as a CPU on a motherboard) in the node due to liquid leakage. Meanwhile, the processing unit can report the liquid leakage condition to an upper management tool, so that management personnel can timely handle the liquid leakage fault. Specifically, the processing unit may send alarm information to the upper management tool, where the alarm information may indicate server information such as an Identification (ID), a location, and the like of the server where the liquid leakage occurs.

It can be understood that the processing unit may pre-store the corresponding relationship between the N input channels and the N nodes, so that when the voltage value of one of the input channels is monitored to be an abnormal voltage value (that is, a voltage value that occurs only when liquid leakage occurs), which node has liquid leakage may be determined according to the corresponding relationship between the input channel and the node. For example, the node 1 corresponds to the input channel 1 of the analog-to-digital converter, and when the processing unit monitors that the voltage value corresponding to the input channel 1 of the analog-to-digital converter is an abnormal voltage value, the processing unit may determine that liquid leakage occurs in the liquid cooling pipeline or the liquid cooling radiator in the node 1.

It should be noted that, the related information (i.e. the same information or similar information) and the related description in the different embodiments described above may be referred to each other.

It should be understood that the processing unit is taken as an example of the execution subject of the interaction schematic in fig. 3 to illustrate the processing flow, but the application does not limit the execution subject of the interaction schematic. For example, the processing unit in fig. 3 may also be a chip, a chip system, or a processor supporting the processing unit to implement the method, and may also be a logic module or software capable of implementing all or part of the functions of the processing unit.

Based on the above system architecture, please refer to fig. 5, and fig. 5 is a schematic structural diagram of a processing unit according to an embodiment of the present disclosure. Among them, the processing unit 500 may include: a processor 501, a communication interface 502, and a memory 503. The processor 501, communication interface 502, and memory 503 may be coupled to each other or to each other via a bus 504.

Illustratively, the memory 503 is used for storing computer programs and data of the processing unit 500, and the memory 503 may include, but is not limited to, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a portable read-only memory (CD-ROM), and the like. The communication interface 502 is used to support the processing unit 500 for communication, such as receiving or transmitting data.

Illustratively, the processor 501 may be a CPU, complex programmable logic device, general purpose processor, digital signal processor, application specific integrated circuit, field programmable gate array or other programmable logic device, transistor logic device, hardware component, or any combination thereof. A processor may also be a combination of computing functions, e.g., a combination of one or more microprocessors, a digital signal processor and a microprocessor, or the like.

In an embodiment, the processing unit 500 may be the processing unit, and the processor 501 may be configured to read the program stored in the memory 503 and execute the operations executed by the processing unit in the method embodiment shown in fig. 3, which may refer to the related description and are not described in detail herein.

It should be noted that the processing unit 500 shown in fig. 5 is only one implementation manner of the embodiment of the present application, and in practical applications, the processing unit 500 may also include more or less components, which is not limited herein.

The embodiment of the application also discloses a computer readable storage medium, which stores instructions that when executed perform the method in the embodiment of the method.

The embodiment of the application also discloses a computer program product comprising instructions, and the instructions are executed to execute the method in the embodiment of the method.

It is to be understood that "connected", as used herein, is intended to mean directly connected (i.e., electrically connected); indirect connections, i.e. connections via other devices, elements, modules, means, etc., are also to be understood.

It should be apparent that the above-described embodiments are only some of the embodiments of the present application, and not all of the embodiments. Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. The terms "first," "second," "third," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between different objects and not necessarily for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process may comprise a sequence of steps or elements, or may alternatively comprise steps or elements not listed, or may alternatively comprise other steps or elements inherent to such process, method, article, or apparatus. It is to be understood that the equal sign of the above condition judgment may be greater than one end or less than one end, for example, the above condition judgment that a threshold is greater than, less than or equal to may be changed to the condition judgment that the threshold is greater than, equal to or less than, and is not limited herein. Specifically, for the first threshold, it may be determined that liquid leakage does not occur in the server node when the voltage value is greater than the first threshold, and it may be determined that liquid leakage occurs in the server node when the voltage value is less than or equal to the first threshold. However, in other embodiments of the present application, it may be determined that the server node has no liquid leakage if the voltage value is greater than or equal to the first threshold, and it may be determined that the server node has liquid leakage if the voltage value is less than the first threshold.

It is to be understood that only some, but not all, of the material relevant to the present application is shown in the drawings. It should be understood that some example embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently or simultaneously. In addition, the order of the operations may be re-arranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, subprograms, and the like.

As used in this specification, the terms "component," "module," "system," "unit," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a unit may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a distribution between two or more computers. In addition, these units may execute from various computer readable media having various data structures stored thereon. The units may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., from a second unit of data interacting with another unit in a local system, distributed system, and/or across a network.

The above-mentioned embodiments, objects, technical solutions and advantages of the present application are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present application, and are not intended to limit the scope of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present application should be included in the scope of the present application.

Claims (10)

1. A computing device, comprising a leakage detection circuit, at least one leakage sensing circuit, and at least one server node;

each server node is provided with at least one liquid leakage induction circuit, the liquid leakage detection circuit is connected with each liquid leakage induction circuit, and the liquid leakage detection circuit is positioned at the outer side of the server node; the liquid leakage detection circuit is used for outputting a corresponding detection signal according to the state of the liquid leakage induction circuit, and the detection signal is used for indicating whether liquid leakage occurs in the server node.

2. The computing device of claim 1, wherein the leakage detection circuit comprises an analog-to-digital converter having at least one input pin and at least one signal detection circuit;

each liquid leakage sensing circuit is connected to one input pin of the analog-to-digital converter through one signal detection circuit; the signal detection circuit is used for outputting a corresponding electric signal according to the state of the liquid leakage induction circuit; the analog-to-digital converter is used for performing analog-to-digital conversion on the electric signal and outputting the detection signal.

3. The computing device of claim 2, wherein the detection signal comprises a first signal and a second signal, each of the leakage sensing circuits comprising a first line and a second line; the first line is connected with one signal detection circuit, and the second line is grounded;

under the condition that the server node is not leaked, the impedance between the first line and the second line is a first impedance, the analog-to-digital converter outputs the first signal, and the first signal is used for indicating that the server node is not leaked;

and under the condition of liquid leakage of the server node, the impedance between the first line and the second line is a second impedance, the analog-to-digital converter outputs the second signal, the second signal is used for representing the liquid leakage of the server node, and the first impedance is larger than the second impedance.

4. The computing device of claim 3, wherein the voltage value of the first signal is twice the voltage value of the second signal.

5. The computing device of claim 2, wherein each of the signal detection circuits comprises a first resistor, one end of the first resistor is connected to one of the leakage sensing circuits and one input pin of the analog-to-digital converter, and the other end of the first resistor is used for connecting to a power supply.

6. The computing device of claim 3, wherein each of the leakage sensing circuits further comprises a second resistor, and wherein the second circuit is coupled to ground through the second resistor.

7. The computing device of claim 1, further comprising a weep warning circuit, the weep warning circuit coupled to the weep detection circuit; the liquid leakage warning circuit is used for determining whether to carry out warning according to the detection signal output by the liquid leakage detection circuit.

8. The computing device of claim 7, wherein the leakage alert circuit comprises a processing unit and an alert indicator light, the processing unit being coupled to the leakage detection circuit and the alert indicator light;

and the processing unit is used for judging whether the server node leaks liquid or not according to the detection signal and controlling the alarm indicator lamp to alarm according to the judgment result.

9. The computing device of any of claims 1-8, wherein the computing device is a liquid-cooled rack server.

10. The computing device of claim 9, wherein the liquid-cooled whole cabinet server comprises a cabinet management board, the liquid leakage detection circuit being disposed on the cabinet management board.

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