CN-122014657-A - Fan state monitoring system, method, electronic equipment and medium

CN122014657ACN 122014657 ACN122014657 ACN 122014657ACN-122014657-A

Abstract

The application provides a fan state monitoring system, a method, electronic equipment and a medium, wherein the system comprises a signal acquisition and conversion module, a fault judgment module and an alarm execution module, wherein the signal acquisition and conversion module is used for acquiring total working current flowing through all alternating-current fans and converting the total working current into voltage signals, the input end of the fault judgment module is connected with the output end of the signal acquisition and conversion module and is used for comparing the voltage signals with a preset fault voltage threshold value so as to output fault logic signals, the preset fault voltage threshold value is higher than a voltage value corresponding to one alternating-current fan in fault and lower than a voltage value corresponding to all the alternating-current fans in normal condition, and the controlled end of the alarm execution module is connected with the output end of the fault judgment module and is used for determining the overall working state of the alternating-current fans according to the fault logic signals. The application realizes reliable and centralized state monitoring and fault alarming for a plurality of alternating current fans.

Inventors

WANG XUEJUN
DONG YI

Assignees

北京半导体专用设备研究所（中国电子科技集团公司第四十五研究所）

Dates

Publication Date: 20260512
Application Date: 20260325

Claims (10)

1. A fan condition monitoring system, the system comprising: the signal acquisition and conversion module is used for acquiring the total working current flowing through the plurality of alternating current fans and converting the total working current into a voltage signal; The input end of the fault judging module is connected with the output end of the signal acquisition and conversion module and is used for comparing the voltage signal with a preset fault voltage threshold value so as to output a fault logic signal, wherein the preset fault voltage threshold value is higher than a voltage value corresponding to the fault of one alternating current fan and lower than a voltage value corresponding to the normal condition of all the alternating current fans; And the controlled end of the alarm execution module is connected with the output end of the fault judgment module and is used for determining the overall working state of the alternating current fans according to the fault logic signals.
2. The system of claim 1, wherein the fault determination module comprises: the input end of the voltage comparison circuit is connected to the output end of the signal acquisition and conversion module, and the voltage comparison circuit is used for comparing the voltage signal with the preset fault voltage threshold value and the reference voltage value respectively so as to output a comparison signal; And the input end of the logic gate circuit is connected to the output end of the voltage comparison circuit so as to receive the comparison signal, and the output end of the logic gate circuit is connected to the controlled end of the alarm execution module.
3. The system of claim 2, wherein the voltage comparison circuit comprises a first voltage comparator, a second voltage comparator, a threshold voltage setting circuit, and a reference voltage setting circuit; The threshold voltage setting circuit is connected to the first input end of the first voltage comparator, the reference voltage setting circuit is connected to the first input end of the second voltage comparator, the second input end of the first voltage comparator and the second input end of the second voltage comparator are connected to the output end of the signal acquisition and conversion module together, the output end of the first voltage comparator outputs a first comparison signal, and the output end of the second voltage comparator outputs a second comparison signal.
4. The system of claim 1, wherein the signal acquisition and conversion module comprises a current transformer and a sampling resistor; The primary winding of the current transformer is connected in series with the power supply loop of the alternating current fan, and two ends of the secondary winding of the current transformer are connected to two ends of the sampling resistor.
5. The system of claim 4, wherein the signal acquisition and conversion module further comprises an AC-DC conversion circuit and a filter amplification circuit; the alternating current input end of the AC-DC conversion circuit is connected to the two ends of the sampling resistor to receive a first alternating current voltage signal, the AC-DC conversion circuit is used for converting the first alternating current voltage signal into a direct current differential signal, and the input end of the filter amplification circuit is connected to the direct current output end of the AC-DC conversion circuit to output the voltage signal.
6. The system of claim 5, wherein the filter amplification circuit comprises a filter, a differential amplifier, and an in-phase amplifier; the input end of the filter is connected to the direct current output end of the AC-DC conversion circuit; the input end of the differential amplifier is connected to the output end of the filter and is used for converting the filtered direct current differential signal into a single-ended signal; The input end of the in-phase amplifier is connected to the output end of the differential amplifier, and is used for carrying out gain amplification on the single-ended signal, and the output end of the in-phase amplifier outputs the voltage signal.
7. The system of claim 1, wherein the alarm execution module comprises an opto-isolator and a relay; the input end of the optocoupler isolator is connected to the output end of the fault judging module, the output end of the optocoupler isolator is connected with and drives the coil of the relay, and at least one group of normally open contacts of the relay form an alarm loop.
8. A method for monitoring fan status, the method comprising: the signal acquisition and conversion module is connected in series in the power supply loops of the alternating current fans and is used for acquiring the total working current flowing through all the alternating current fans and converting the total working current into a voltage signal; the input end of the fault judging module is connected with the output end of the signal collecting and converting module and is used for comparing the voltage signal with a preset fault voltage threshold value so as to output a fault logic signal, wherein the preset fault voltage threshold value is higher than a voltage value corresponding to the fault of one alternating current fan and lower than a voltage value corresponding to the normal condition of all the alternating current fans; the controlled end of the alarm execution module is connected with the output end of the fault judgment module and is used for determining the overall working state of the alternating current fans according to the fault logic signals.
9. An electronic device comprising a processor, a memory and a bus, the memory storing machine-readable instructions executable by the processor, the processor in communication with the memory via the bus when the electronic device is in operation, the processor executing the machine-readable instructions to perform the steps of the method of claim 8.
10. A computer-readable storage medium, characterized in that it has stored thereon a computer program which, when executed by a processor, performs the steps of the method according to claim 8.

Description

Fan state monitoring system, method, electronic equipment and medium Technical Field The present application relates to the field of signal detection technologies, and in particular, to a fan state monitoring system, a method, an electronic device, and a medium. Background In semiconductor manufacturing equipment, a high-integration control cabinet is generally designed in a sealed manner to suppress EMC interference, and relies on a fan case composed of a plurality of heat dissipation fans to forcibly dissipate heat. The stable operation of the equipment requires real-time monitoring of the state of the fan, and any fan fault can cause heat dissipation failure to influence the reliability of the whole machine. Currently, the mainstream monitoring scheme relies on a fault output signal (such as a fault output) of the fan, and the fan state is determined by detecting the signal level. However, such schemes can only detect the dc fan status, and fail to detect the ac power failure-free output fan anomalies. Disclosure of Invention Accordingly, the present application is directed to a fan status monitoring system, a method, an electronic device and a medium, which overcome at least one of the above-mentioned drawbacks. In a first aspect, the present application provides a fan condition monitoring system, the system comprising: the signal acquisition and conversion module is used for acquiring the total working current flowing through the plurality of alternating current fans and converting the total working current into a voltage signal; The input end of the fault judging module is connected with the output end of the signal acquisition and conversion module and is used for comparing the voltage signal with a preset fault voltage threshold value so as to output a fault logic signal, wherein the preset fault voltage threshold value is higher than a voltage value corresponding to the fault of one alternating current fan and lower than a voltage value corresponding to the normal condition of all the alternating current fans; And the controlled end of the alarm execution module is connected with the output end of the fault judgment module and is used for determining the overall working state of the alternating current fans according to the fault logic signals. In one possible implementation manner, the fault judging module includes: the input end of the voltage comparison circuit is connected to the output end of the signal acquisition and conversion module, and the voltage comparison circuit is used for comparing the voltage signal with the preset fault voltage threshold value and the reference voltage value respectively so as to output a comparison signal; And the input end of the logic gate circuit is connected to the output end of the voltage comparison circuit so as to receive the comparison signal, and the output end of the logic gate circuit is connected to the controlled end of the alarm execution module. In one possible embodiment, the voltage comparison circuit includes a first voltage comparator, a second voltage comparator, a threshold voltage setting circuit, and a reference voltage setting circuit; The threshold voltage setting circuit is connected to the first input end of the first voltage comparator, the reference voltage setting circuit is connected to the first input end of the second voltage comparator, the second input end of the first voltage comparator and the second input end of the second voltage comparator are connected to the output end of the signal acquisition and conversion module together, the output end of the first voltage comparator outputs a first comparison signal, and the output end of the second voltage comparator outputs a second comparison signal. In one possible implementation, the signal acquisition and conversion module includes a current transformer and a sampling resistor; The primary winding of the current transformer is connected in series with the power supply loop of the alternating current fan, and two ends of the secondary winding of the current transformer are connected to two ends of the sampling resistor. In one possible implementation, the signal acquisition and conversion module further comprises an AC-DC conversion circuit and a filter amplification circuit; the alternating current input end of the AC-DC conversion circuit is connected to the two ends of the sampling resistor to receive a first alternating current voltage signal, the AC-DC conversion circuit is used for converting the first alternating current voltage signal into a direct current differential signal, and the input end of the filter amplification circuit is connected to the direct current output end of the AC-DC conversion circuit to output the voltage signal. In one possible implementation, the filtering and amplifying circuit includes a filter, a differential amplifier, and an in-phase amplifier; the input end of the filter is connected to the direct current output end of the AC-DC conversi