CN114268077A - OLT equipment temperature overheating protection circuit and method - Google Patents
OLT equipment temperature overheating protection circuit and method Download PDFInfo
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- CN114268077A CN114268077A CN202111421269.3A CN202111421269A CN114268077A CN 114268077 A CN114268077 A CN 114268077A CN 202111421269 A CN202111421269 A CN 202111421269A CN 114268077 A CN114268077 A CN 114268077A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The invention discloses an OLT equipment temperature overheating protection circuit and a method, wherein the protection circuit comprises a CPU, a first temperature chip, a second temperature chip, a CPLD module, a first fan system, a second fan system and a system power supply; the CPLD module is used as I2C main equipment for reading the temperature value of the second temperature chip and comparing the temperature value with a target value preset in the CPLD module, when the read value is larger than the target value, the CPLD module judges that the system is overheated, and the CPLD module controls the power supply of the system to be powered off and controls the second fan system to work and cool down; when the read value is smaller than the target value, the CPLD module controls the power supply of the system to recover power supply and controls the second fan system to stop working at the same time; meanwhile, the CPLD module informs the CPU of overheating through a preset pin level change, and the CPU reports an overheating alarm signal appearing on the control platform. The invention can meet the requirement that the fan of the OLT equipment can work normally when the fan is abnormal.
Description
Technical Field
The invention relates to the technical field of over-temperature protection, in particular to a temperature over-temperature protection circuit and method for OLT equipment.
Background
The optical access network is an access network using light as a transmission medium, and replaces a copper wire for accessing each home. The Optical Network Unit (ODN) is composed of an OLT (Optical Line Terminal), an ONU (Optical Network Unit) and an ODN (Optical Distribution Network), wherein the OLT is a core component of an Optical access Network, is equivalent to a switch or a router in a traditional communication Network and is also a multi-service providing platform. For one OLT device, the traffic volume and the bandwidth flow are very large, the internal circuit is complex, PON chips, switch chips, CPUs and the like used in the device are all devices with high power consumption and large heat productivity, the power consumption of one OLT is generally more than 50W or even up to 150W, the heat dissipation is very important, the heat dissipation of the OLT can be basically realized only by a fan on the device, and when the fan fails to operate normally, the temperature of the device can be continuously raised to exceed the critical operating temperature of the CPU, so that the CPU can not work normally or even the chips are damaged.
Disclosure of Invention
In view of the above, in order to solve the above problems in the prior art, the present invention provides a temperature overheat protection circuit and method for an OLT device, which can meet the requirement that a fan of the OLT device can normally operate even when the fan is abnormal.
The invention solves the problems through the following technical means:
on one hand, the invention provides an OLT equipment temperature overheating protection circuit, which comprises a CPU, a first temperature chip, a second temperature chip, a CPLD module, a first fan system, a second fan system and a system power supply;
the first temperature chip and the second temperature chip detect the temperature near the CPU;
the CPU detects the temperature value of the first temperature chip and then controls the first fan system to cool down;
the CPLD module is used as I2C main equipment for reading the temperature value of the second temperature chip and comparing the temperature value with a target value preset in the CPLD module, when the read value is larger than the target value, the CPLD module judges that the system is overheated, and the CPLD module controls the power supply of the system to be powered off and controls the second fan system to work and cool down; when the read value is smaller than the target value, the CPLD module controls the power supply of the system to recover power supply and controls the second fan system to stop working at the same time; and meanwhile, the CPLD module informs the CPU of the overheating condition just before through a preset pin level change, the CPU reports an overheating alarm signal appearing on the control platform, and after the CPU reads a preset pin value, the logic restores the pin level to be in an initial state.
Further, a reading time interval of the CPLD module as the I2C master device for reading the temperature value of the second temperature chip may be set.
Further, the system is judged to be overheated due to the CPU being stuck or the first fan system being unable to operate.
Further, the CPLD module controls the system power supply to be powered off or power supply to be recovered through a preset pin.
Further, the CPLD module controls the second fan system to work through a preset pin to cool or stop working.
On the other hand, the invention provides an OLT equipment temperature overheating protection method, which comprises the following steps:
step S1: the first temperature chip and the second temperature chip detect the temperature near the CPU;
step S2: the CPU detects the temperature value of the first temperature chip and then controls the first fan system to cool down;
step S3: the CPLD module is used as I2C main equipment for reading the temperature value of the second temperature chip and comparing the temperature value with a target value preset in the CPLD module, when the read value is larger than the target value, the CPLD module judges that the system is overheated, and the CPLD module controls the power supply of the system to be powered off and controls the second fan system to work and cool down;
step S4: the CPLD module is used as I2C main equipment for reading the temperature value of the second temperature chip and comparing the temperature value with a target value preset in the CPLD module, when the read value is smaller than the target value, the CPLD module can control the power supply of the system to recover power supply, and simultaneously the CPLD module controls the second fan system to stop working;
step S5: meanwhile, the CPLD module informs the CPU of overheating through a preset pin level change, and the CPU reports an overheating alarm signal appearing on the control platform; after the CPU reads the predetermined pin value, the CPU will make the logic restore the pin level to the initial state.
Further, step S5 specifically includes the following steps:
step S501: the CPU reads the level value output by the CPLD module through a preset pin; when the read level is high, the CPU reports an alarm signal to the control platform; when the read level is low, the CPU does not report information;
step S502: when the level value output by the CPLD module read by the CPU is high, the CPU controls the CPLD module to reset the pin level value through the I2C interface, and when the level value output by the CPLD module read by the CPU is low, the CPLD module is not operated by the CPU.
Further, a reading time interval of the CPLD module as the I2C master device for reading the temperature value of the second temperature chip may be set.
Further, the CPLD module controls the system power supply to be powered off or power supply to be recovered through a preset pin.
Further, the CPLD module controls the second fan system to work through a preset pin to cool or stop working.
Compared with the prior art, the invention has the beneficial effects that at least:
the CPLD module is used as an I2C master device for reading the temperature value of the second temperature chip and comparing the temperature value with a target value preset in the CPLD module, when the read value is larger than the target value, the CPLD module judges that the system is overheated, and controls the power supply of the system to be powered off and the second fan system to work and cool down; when the read value is smaller than the target value, the CPLD module controls the power supply of the system to recover power supply and controls the second fan system to stop working at the same time; and meanwhile, the CPLD module informs the CPU of the overheating condition just before through a preset pin level change, the CPU reports an overheating alarm signal appearing on the control platform, and after the CPU reads a preset pin value, the logic restores the pin level to be in an initial state. The fan of the OLT equipment can work normally when abnormal conditions occur.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of the temperature overheat protection circuit of the OLT apparatus according to the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It should be noted that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.
Example 1
As shown in fig. 1, the present invention provides an OLT device temperature overheat protection circuit, which includes a CPU, a first temperature chip, a second temperature chip, a CPLD module, a first fan system, a second fan system, and a system power supply.
The first temperature chip and the second temperature chip detect the temperature near the CPU.
The main system is that the CPU detects the temperature value of the first temperature chip and then controls the first fan system to cool, and the normal operation of the OLT equipment is that the system is operated all the time.
The CPLD module is used as I2C main equipment for reading the temperature value of the second temperature chip and comparing the temperature value with a target value preset in the CPLD module, when the read value is larger than the target value, the CPLD module judges that the system is overheated, possibly a CPU is blocked or the first fan system cannot run, the CPLD module controls the power supply of the system to be powered off, and simultaneously controls the second fan system to work for cooling; when the read value is smaller than the target value, the CPLD module controls the power supply of the system to recover power supply and controls the second fan system to stop working at the same time; and meanwhile, the CPLD module informs the CPU of the overheating condition just before through a preset pin level change, the CPU reports an overheating alarm signal appearing on the control platform, and after the CPU reads a preset pin value, the logic restores the pin level to be in an initial state.
Example 2
The invention provides an OLT equipment temperature overheating protection method, which comprises the following steps:
step S1: the first temperature chip and the second temperature chip detect the temperature near the CPU;
step S2: the CPU detects the temperature value of the first temperature chip and then controls the first fan system to cool down;
step S3: the CPLD module is used as an I2C master device to read (the reading time interval can be set) the temperature value of the second temperature chip and compare the temperature value with a target value preset inside; when the read temperature value is larger than the target value, the system is judged to be overheated, and faults such as abnormal operation of a CPU (central processing unit) or incapability of operating the first fan system are possible, the CPLD module controls the power supply of the system to be powered off through a preset pin, and simultaneously controls the second fan system to work to cool down through the preset pin;
step S4: the CPLD module is used as I2C main equipment for reading the temperature value of the second temperature chip and comparing the temperature value with a target value preset in the CPLD module, and when the read temperature value is smaller than the target value, the CPLD module can control the power supply of the system to recover power supply; meanwhile, the CPLD module controls the second fan system to stop working through a preset pin;
step S5: meanwhile, the CPLD module informs the CPU that an overheating condition occurs just now through a preset pin level change, and reports an overheating alarm signal occurring on the control platform by the CPU; after the CPU reads the predetermined pin value, the CPU will make the logic restore the pin level to the initial state.
Step S5 specifically includes the following steps:
step S501: the CPU reads (sets time interval) the level value output by the CPLD module through a preset pin; when the read level is high, the CPU reports an alarm signal to the control platform; when the read level is low, the CPU does not hold the information.
Step S502: when the CPU reads that the level value output by the CPLD module is high, the CPU controls the CPLD module to reset the pin level value through the I2C interface. When the CPU reads that the level value output by the CPLD module is low, the CPU does not operate the CPLD module.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An OLT equipment temperature overheating protection circuit is characterized by comprising a CPU, a first temperature chip, a second temperature chip, a CPLD module, a first fan system, a second fan system and a system power supply;
the first temperature chip and the second temperature chip detect the temperature near the CPU;
the CPU detects the temperature value of the first temperature chip and then controls the first fan system to cool down;
the CPLD module is used as I2C main equipment for reading the temperature value of the second temperature chip and comparing the temperature value with a target value preset in the CPLD module, when the read value is larger than the target value, the CPLD module judges that the system is overheated, and the CPLD module controls the power supply of the system to be powered off and controls the second fan system to work and cool down; when the read value is smaller than the target value, the CPLD module controls the power supply of the system to recover power supply and controls the second fan system to stop working at the same time; and meanwhile, the CPLD module informs the CPU of the overheating condition just before through a preset pin level change, the CPU reports an overheating alarm signal appearing on the control platform, and after the CPU reads a preset pin value, the logic restores the pin level to be in an initial state.
2. The OLT device temperature overheating protection circuit of claim 1, wherein a reading time interval for the CPLD module to read the temperature value of the second temperature chip as the I2C master device is settable.
3. The OLT device temperature overheating protection circuit of claim 1, wherein the system overheating is determined to be due to a CPU jam or a first fan system failure.
4. The OLT device temperature overheating protection circuit of claim 1, wherein the CPLD module controls a system power supply to power off or restore power supply through a preset pin.
5. The OLT device temperature overheating protection circuit of claim 1, wherein the CPLD module controls the second fan system to operate to cool down or stop operating through a preset pin.
6. An OLT equipment temperature overheating protection method is characterized by comprising the following steps:
step S1: the first temperature chip and the second temperature chip detect the temperature near the CPU;
step S2: the CPU detects the temperature value of the first temperature chip and then controls the first fan system to cool down;
step S3: the CPLD module is used as I2C main equipment for reading the temperature value of the second temperature chip and comparing the temperature value with a target value preset in the CPLD module, when the read value is larger than the target value, the CPLD module judges that the system is overheated, and the CPLD module controls the power supply of the system to be powered off and controls the second fan system to work and cool down;
step S4: the CPLD module is used as I2C main equipment for reading the temperature value of the second temperature chip and comparing the temperature value with a target value preset in the CPLD module, when the read value is smaller than the target value, the CPLD module can control the power supply of the system to recover power supply, and simultaneously the CPLD module controls the second fan system to stop working;
step S5: meanwhile, the CPLD module informs the CPU of overheating through a preset pin level change, and the CPU reports an overheating alarm signal appearing on the control platform; after the CPU reads the predetermined pin value, the CPU will make the logic restore the pin level to the initial state.
7. The OLT device temperature overheating protection method of claim 6, wherein the step S5 specifically comprises the steps of:
step S501: the CPU reads the level value output by the CPLD module through a preset pin; when the read level is high, the CPU reports an alarm signal to the control platform; when the read level is low, the CPU does not report information;
step S502: when the level value output by the CPLD module read by the CPU is high, the CPU controls the CPLD module to reset the pin level value through the I2C interface, and when the level value output by the CPLD module read by the CPU is low, the CPLD module is not operated by the CPU.
8. The OLT device temperature overheating protection method of claim 6, wherein a reading time interval for the CPLD module to read the temperature value of the second temperature chip as the I2C master device is settable.
9. The OLT device temperature overheating protection method of claim 6, wherein the CPLD module controls a system power supply to power off or resume power supply through a preset pin.
10. The OLT device temperature overheating protection method of claim 6, wherein the CPLD module controls the second fan system to operate to cool down or stop operating through a preset pin.
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