CN115405547A - Multi-channel fan state detection device and method - Google Patents
Multi-channel fan state detection device and method Download PDFInfo
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- CN115405547A CN115405547A CN202210945006.0A CN202210945006A CN115405547A CN 115405547 A CN115405547 A CN 115405547A CN 202210945006 A CN202210945006 A CN 202210945006A CN 115405547 A CN115405547 A CN 115405547A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention provides a multi-channel fan state detection device and a method thereof in the technical field of fan state detection, wherein the device comprises an MCU and a plurality of fan control modules; the fan control module comprises an access state detection circuit, a start-stop control circuit, an operation state detection circuit and an operation state indication circuit; one end of the access state detection circuit is connected with the running state indication circuit, and the other end of the access state detection circuit is connected with the start-stop control circuit; one end of the running state detection circuit is connected with the start-stop control circuit, and the other end of the running state detection circuit is connected with the running state indication circuit; and the MCU is respectively connected with the start-stop control circuit, the running state detection circuit and the running state indication circuit. The invention has the advantages that: the running reliability of the fan is greatly improved, and the running power consumption of the fan is greatly reduced.
Description
Technical Field
The invention relates to the technical field of fan state detection, in particular to a multi-channel fan state detection device and method.
Background
The fan is a radiating equipment, and various equipment that can produce a large amount of heats in the operation process all need use the fan to dispel the heat, for example equipment such as power cabinet, formation grading cabinet, and when the unable normal operating of fan, can direct influence the stability of corresponding equipment operation, consequently need grasp the running state of fan in real time.
However, conventionally, the running state of the fan can only be checked manually at regular time, the timeliness is poor, the fan cannot be closed in time when the fan is abnormal, and an idle fan cannot be controlled to replace a failed fan, so that the influence of the failed fan is reduced; when the environmental temperature is low, the fan cannot be intelligently turned off to reduce the power consumption; the fan can not be linked with equipment, and if the fan is damaged, relevant equipment can not be informed to correspondingly adjust the output power.
Therefore, how to provide a multi-channel fan state detection device and method to achieve the purposes of improving the fan operation reliability and reducing the fan operation power consumption becomes a technical problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a multi-channel fan state detection device and method, which can improve the running reliability of a fan and reduce the running power consumption of the fan.
In a first aspect, the invention provides a multi-channel fan state detection device, which comprises an MCU and a plurality of fan control modules;
the fan control module comprises an access state detection circuit, a start-stop control circuit, an operation state detection circuit and an operation state indication circuit;
one end of the access state detection circuit is connected with the running state indicating circuit, and the other end of the access state detection circuit is connected with the start-stop control circuit; one end of the running state detection circuit is connected with the start-stop control circuit, and the other end of the running state detection circuit is connected with the running state indication circuit; and the MCU is respectively connected with the start-stop control circuit, the running state detection circuit and the running state indication circuit.
Furthermore, the access state detection circuit comprises an optocoupler K1, a capacitor C1, a resistor R2, a resistor R3, a resistor R4, a triode Q1, a diode VD2 and a fuse F1;
an emitting electrode of the optocoupler K1 is connected with the running state indicating circuit, an anode of an input end is connected with a capacitor C1, a resistor R1 and a collector of the triode Q1, and a cathode of the input end is connected with the capacitor C1, the resistor R1 and a resistor R4; the base electrode of the triode Q1 is connected with the resistor R2, and the emitting electrode of the triode Q1 is connected with the input end of the diode VD 1; the input end of the diode VD2 is connected with the output end of the diode VD1 and the resistor R3, and the output end of the diode VD2 is connected with the resistor R2, the resistor R3 and the fuse F1; the fuse F1 is connected with the start-stop control circuit.
Furthermore, the start-stop control circuit comprises an optical coupler K2, a resistor R16, a resistor R17, a resistor R18 and an MOS (metal oxide semiconductor) transistor Q5;
the collector of the optocoupler K2 is connected with the resistor R16 and the resistor R18, the emitter is grounded, the anode of the input end is connected with the resistor R17, and the cathode of the input end is grounded; the resistor R17 is connected with the MCU; and the grid electrode of the MOS tube Q5 is connected with the resistor R18, the source electrode of the MOS tube Q5 is connected with the access state detection circuit, and the drain electrode of the MOS tube Q5 is connected with the running state detection circuit.
Further, the operation state detection circuit includes a MOS transistor Q4, a diode D2, a diode D3, a diode D4, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a capacitor C3, a capacitor C4, and a connection terminal J1;
the input end of the diode D2 is connected with the running state indicating circuit, and the output end of the diode D2 is connected with the drain electrode of the MOS tube Q4 and the output end of the diode D3; the grid electrode of the MOS tube Q4 is connected with the resistor R14, the capacitor C4, the output end of the diode D4, the resistor R13 and the running state indicating circuit, and the source electrode of the MOS tube Q4 is connected with the resistor R14, the capacitor C4, the input end of the diode D4 and the resistor R15 and is grounded; a pin 1 of the wiring terminal J1 is connected with the start-stop control circuit, a pin 2 is connected with a resistor R11 and a resistor R13, and a pin 3 is grounded; one end of the resistor R12 is connected with the input ends of the resistor R10, the capacitor C3 and the diode D3, and the other end of the resistor R12 is connected with the MCU.
Further, the operating state indicating circuit includes a MOS transistor Q2, a MOS transistor Q3, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C2, and a light emitting diode D1;
the input end of the light-emitting diode D1 is respectively connected with the resistor R8 and the resistor R9, and the output end of the light-emitting diode D1 is grounded; one end of the capacitor C2 is connected with the grid of the MOS tube Q2 and the operation state detection circuit, and the other end of the capacitor C2 is grounded;
the grid electrode of the MOS tube Q3 is connected with the resistor R5 and the running state detection circuit, the drain electrode of the MOS tube Q3 is connected with the resistor R8, and the source electrode of the MOS tube Q2 is connected with the resistor R5, the resistor R6 and the source electrode of the MOS tube Q2 and the access state detection circuit; the drain electrode of the MOS tube Q2 is connected with a resistor R9; one end of the resistor R7 is connected with the resistor R6 and the MCU, and the other end of the resistor R7 is grounded.
In a second aspect, the invention provides a method for detecting a state of a multi-channel fan, which comprises the following steps:
s10, connecting the fan to a wiring terminal J1, and starting the fan by the MCU through the start-stop control module;
s20, when the running state indicating circuit detects that the fan runs normally through the running state detection circuit, the running state indicating circuit controls the light emitting diode D1 to light a green light;
step S30, the MCU detects the running state of the fan in real time through the running state indicating circuit and the running state detecting circuit, and the fan is closed through the start-stop control module when the fan runs abnormally;
step S40, the MCU periodically restarts the fan, verifies whether the fan is recovered to be normal or not, records the restart times, and triggers a fault alarm based on the restart times;
and S50, replacing the fan based on the fault alarm, and clearing the restart times.
Further, the step S10 specifically includes:
respectively connecting a FAN + pin, a FAN _ RD pin and a FAN-pin of the FAN to pins 1, 2 and 3 of a connecting terminal J1, and starting the FAN by conducting an MOS (metal oxide semiconductor) tube Q5 of the start-stop control module by the MCU;
the step S20 is specifically:
when the FAN operates normally, a low level is output to the wiring terminal J1 through a FAN _ RD pin and conducted to the grid electrode of the MOS tube Q2, the source electrode of the MOS tube Q2 is a high level, the grid electrode of the MOS tube Q2 is a low level, and then the high level is output through the drain electrode, and the light-emitting device on the right side of the light-emitting diode D1 is conducted to light a green lamp.
Further, the step S30 specifically includes:
when the MCU detects that the MCU _ FAN _ IN is at a low level, the poor contact between the FAN and the wiring terminal J1 is judged; when the MCU detects that the MCU _ FAN _ IN is at a high level and the MCU _ RD _ IN is at a low level, judging that the FAN normally operates; when the MCU detects that the MCU _ FAN _ IN is at a high level and the MCU _ RD _ IN is at a high level, judging that the FAN runs abnormally;
when the fan operates abnormally, the MCU turns off the MOS tube Q5 of the start-stop control module to close the fan.
Further, the step S40 specifically includes:
s41, the MCU sets a restart period and an alarm frequency threshold;
s42, the MCU controls the FAN to be periodically restarted on the basis of the restart period, whether the FAN is normal or not is judged by reading the MCU _ FAN _ IN signal and the MCU _ RD _ IN signal, and if yes, the FAN is kept running; if not, the process proceeds to step S43,
S43, recording the restart times of the fan, judging whether the restart times are greater than an alarm time threshold, and if so, triggering a fault alarm; if not, the process proceeds to step S42.
Further, the step S20 further includes:
the method comprises the steps that an MCU (micro control unit) acquires the working temperature of fan installation equipment, and controls the start and stop of each fan based on the working temperature and a preset temperature threshold value;
the step S30 further includes:
and when the fan which is shut down due to abnormal operation exists, starting the idle fan to perform auxiliary heat dissipation or reducing the output power of fan installation equipment.
The invention has the advantages that:
1. the MCU is respectively connected with the start-stop control circuit, the running state detection circuit and the running state indicating circuit, the MCU can detect the running state of the fan in real time through the running state detection circuit and the running state indicating circuit, and the running state of the fan (the fan is not switched on, the fan is normally lighted green, and the fan is abnormally lighted red) is indicated through the light emitting diode D1 of the running state indicating circuit.
2. The optocoupler K1 is arranged in the access state detection circuit to isolate high voltage and low voltage so as to solve the problem of incompatibility under different voltage working condition states.
3. By arranging the diode VD1 and the diode VD2, when the PVCC is reversely connected with the GND _ IN, the diode VD1 and the diode VD2 are IN a cut-off state, and the reverse connection protection effect is realized.
4. Through setting up fuse F1, when the short circuit of pin 1, 3 of binding post J1, fuse F1 will be in high resistance value state in the short time, cuts off the electric current in the circuit, plays overcurrent protection effect.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is a schematic circuit block diagram of a multi-channel fan status detection apparatus according to the present invention.
Fig. 2 is a circuit diagram of a multi-channel fan status detection apparatus according to the present invention.
FIG. 3 is a schematic wiring diagram of the MCU of the present invention.
FIG. 4 is a flow chart of a method for multi-channel fan status detection in accordance with the present invention.
Description of the labeling:
100-a multi-channel fan state detection device, 1-MCU, 2-fan control module, 21-access state detection circuit, 22-start and stop control circuit, 23-running state detection circuit, 24-running state indication circuit.
Detailed Description
The technical scheme in the embodiment of the application has the following general idea: set up MCU1 respectively with open and stop control circuit 22, running state detection circuit 23 and running state indicating circuit 24 are connected, MCU1 detects the running state of fan in real time through running state detection circuit 23 and running state indicating circuit 24, the running state of fan is instructed through emitting diode D1 of running state indicating circuit 24, close the fan through opening and stopping control circuit 22 when the fan operation is unusual, start idle fan and replace the fan of unusual operation, or inform fan erection equipment through MCU1 and reduce output, close the fan voluntarily when ambient temperature is lower, in order to promote fan operational reliability, reduce fan running power consumption.
Referring to fig. 1 to 4, a preferred embodiment of a multi-channel fan status detection apparatus according to the present invention includes an MCU1 and a plurality of fan control modules 2; the MCU1 is used for detecting the running state of the fan, receiving an instruction of an upper computer through a communication module, communicating with fan installation equipment to obtain a working temperature, and controlling the start and stop of the fan, and in the specific implementation, the MCU1 capable of realizing the function is selected from the prior art, and is not limited to any model, such as the MCU1 of STM32F103 series of ST company, and the control program is well known by technicians in the field, which can be obtained by the technicians in the field without creative work;
the fan control module 2 comprises an access state detection circuit 21, a start-stop control circuit 22, an operation state detection circuit 23 and an operation state indication circuit 24;
one end of the access state detection circuit 21 is connected with the running state indication circuit 24, and the other end is connected with the start-stop control circuit 22; one end of the running state detection circuit 23 is connected with the start-stop control circuit 22, and the other end is connected with the running state indication circuit 24; the MCU1 is connected to a start/stop control circuit 22, an operation state detection circuit 23, and an operation state indication circuit 24.
The access state detection circuit 21 comprises an optocoupler K1, a capacitor C1, a resistor R2, a resistor R3, a resistor R4, a triode Q1, a diode VD2 and a fuse F1; the fuse F1 is a self-recovery fuse;
an emitting electrode of the optocoupler K1 is connected with the running state indicating circuit 24, an anode of an input end is connected with a capacitor C1, a resistor R1 and a collector of the triode Q1, and a cathode of the input end is connected with the capacitor C1, the resistor R1 and a resistor R4; the base electrode of the triode Q1 is connected with the resistor R2, and the emitting electrode of the triode Q1 is connected with the input end of the diode VD 1; the input end of the diode VD2 is connected with the output end of the diode VD1 and the resistor R3, and the output end of the diode VD2 is connected with the resistor R2, the resistor R3 and the fuse F1; the fuse F1 is connected to the start-stop control circuit 22.
The start-stop control circuit 22 comprises an optocoupler K2, a resistor R16, a resistor R17, a resistor R18 and an MOS transistor Q5;
the collector of the optocoupler K2 is connected with the resistor R16 and the resistor R18, the emitter is grounded, the anode of the input end is connected with the resistor R17, and the cathode of the input end is grounded; the resistor R17 is connected with the MCU 1; the gate of the MOS transistor Q5 is connected to the resistor R18, the source is connected to the access state detection circuit 21, and the drain is connected to the operating state detection circuit 23.
The operating state detection circuit 23 includes a MOS transistor Q4, a diode D2, a diode D3, a diode D4, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a capacitor C3, a capacitor C4, and a connection terminal J1; pins 1, 2 and 3 of the wiring terminal J1 are respectively used for connecting a FAN + pin, a FAN _ RD pin and a FAN-pin of a FAN; a FAN + pin is a power supply anode, a FAN-pin is a power supply cathode, and a FAN _ RD pin is a pin for outputting signals to the outside by the FAN; only when the pins 1 and 3 of the wiring terminal J1 are connected to the FAN + pin and the FAN-pin of the FAN, the wiring terminal J1 is conducted to form a loop;
the input end of the diode D2 is connected with the running state indicating circuit 24, and the output end of the diode D2 is connected with the drain electrode of the MOS tube Q4 and the output end of the diode D3; the grid electrode of the MOS tube Q4 is connected with the resistor R14, the capacitor C4, the output end of the diode D4, the resistor R13 and the running state indicating circuit 24, and the source electrode of the MOS tube Q4 is connected with the resistor R14, the capacitor C4, the input end of the diode D4 and the resistor R15 and is grounded; a pin 1 of the wiring terminal J1 is connected with the start-stop control circuit 22, a pin 2 is connected with the resistor R11 and the resistor R13, and a pin 3 is grounded; one end of the resistor R12 is connected with the input ends of the resistor R10, the capacitor C3 and the diode D3, and the other end of the resistor R12 is connected with the MCU 1.
The operating state indicating circuit 24 includes a MOS transistor Q2, a MOS transistor Q3, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C2, and a light emitting diode D1; the light emitting device on the left side of the light emitting diode D1 is used for emitting red light, and the light emitting device on the right side is used for emitting green light;
the input end of the light-emitting diode D1 is respectively connected with the resistor R8 and the resistor R9, and the output end of the light-emitting diode D1 is grounded; one end of the capacitor C2 is connected with the grid of the MOS transistor Q2 and the operation state detection circuit 23, and the other end is grounded;
the gate of the MOS transistor Q3 is connected with the resistor R5 and the operation state detection circuit 23, the drain is connected with the resistor R8, and the source is connected with the resistor R5, the resistor R6, the source of the MOS transistor Q2 and the access state detection circuit 21; the drain electrode of the MOS tube Q2 is connected with a resistor R9; one end of the resistor R7 is connected with the resistor R6 and the MCU1, and the other end of the resistor R7 is grounded.
The resistor R3 is an adjustable resistor, and the triode Q1 is a PNP type triode.
And the MOS tube Q4 is an NMOS tube.
MOS pipe Q2 and MOS pipe Q3 are the PMOS pipe.
The invention discloses a better embodiment of a multi-channel fan state detection method, which comprises the following steps:
s10, connecting the fan to a wiring terminal J1, and starting the fan by the MCU through the start-stop control module;
s20, when the running state indicating circuit detects that the fan runs normally through the running state detection circuit, the running state indicating circuit controls the light emitting diode D1 to light a green light;
s30, detecting the running state of the fan by the MCU through the running state indicating circuit and the running state detecting circuit in real time, and closing the fan through the start-stop control module when the fan runs abnormally;
step S40, the MCU periodically restarts the fan, verifies whether the fan is recovered to be normal or not, records the restart times, and triggers a fault alarm based on the restart times;
and S50, replacing the fan based on the fault alarm, and clearing the restart times.
The step S10 specifically includes:
respectively connecting a FAN + pin, a FAN _ RD pin and a FAN-pin of the FAN to pins 1, 2 and 3 of a connecting terminal J1, and starting the FAN by conducting an MOS (metal oxide semiconductor) tube Q5 of the start-stop control module by the MCU;
the step S20 is specifically:
when the FAN operates normally, the low level is output to pin 2 of the wiring terminal J1 through the FAN _ RD pin, the level of TP3 is pulled down and conducted to the grid of the MOS transistor Q2, the source of the MOS transistor Q2 is high level, the grid is low level, and then the high level is output through the drain, and the light emitting device on the right side of the light emitting diode D1 is turned on to light a green light.
The inside of the FAN is an open leakage circuit, the FAN _ RD signal is short-circuited to the ground by the MOS tube in the FAN during normal work, the voltage of the resistor R11 is further pulled down to the ground, the MOS tube is turned off during the locked-rotor (abnormal operation) of the FAN, and the FAN _ RD signal is pulled up to a high level by the resistor R11.
The step S30 specifically includes:
when the MCU detects that the MCU _ FAN _ IN is at a low level, the poor contact between the FAN and the wiring terminal J1 is judged; when the MCU detects that the MCU _ FAN _ IN is at a high level and the MCU _ RD _ IN is at a low level, judging that the FAN normally operates; when the MCU detects that the MCU _ FAN _ IN is at a high level and the MCU _ RD _ IN is at a high level, judging that the FAN runs abnormally;
when the fan operates abnormally, the MCU turns off the MOS tube Q5 of the start-stop control module to close the fan.
When the FAN does not access to the wiring terminal J1 or contact is poor, the wiring terminal J1 is IN a broken circuit state, a loop is not formed, the diode VD1 and the diode VD2 are IN a cut-off state, the voltage drop between the base electrode of the triode Q1 and the emitting electrode is not enough to conduct, the optocoupler K1 is further IN a cut-off state, the emitting electrode of the optocoupler K1 outputs a low level to the running state indicating circuit, the light emitting diode D1 is not bright, and the MCU _ FAN _ IN is a low level.
When the FAN is locked up (abnormal operation), a high level is output to a pin 2 of a wiring terminal J1 through a FAN _ RD pin, the level of TP3 is pulled high and is conducted to a grid electrode of an MOS (metal oxide semiconductor) tube Q4, a drain electrode and the grid electrode of the MOS tube Q4 are both high levels and are cut off, a low level is output to the grid electrode of the MOS tube Q3, a source electrode of the MOS tube Q3 is high level, the grid electrode is low level, and then the high level is output through the drain electrode, and a light-emitting device on the left side of the light-emitting diode D1 is conducted to light a red light; since the MOS transistor Q4 is turned off to be at a low level, the diode D3 is turned on, and the MCU _ RD _ IN is at a high level.
The step S40 specifically includes:
s41, the MCU sets a restart period and an alarm frequency threshold;
s42, the MCU controls the FAN to be periodically restarted on the basis of the restart period, whether the FAN is normal or not is judged by reading the MCU _ FAN _ IN signal and the MCU _ RD _ IN signal, and if yes, the FAN is kept running; if not, the process proceeds to step S43,
S43, recording the restarting times of the fan, judging whether the restarting times are larger than an alarm time threshold value, and if so, triggering a fault alarm; if not, the process proceeds to step S42.
The step S20 further includes:
the method comprises the following steps that the MCU obtains the working temperature of fan installation equipment, and the start and stop of each fan are controlled based on the working temperature and a preset temperature threshold; starting the fan when the working temperature is higher than a temperature threshold value, and closing the fan when the working temperature is lower than the temperature threshold value;
the step S30 further includes:
and when the fan which is shut down due to abnormal operation exists, starting the idle fan to perform auxiliary heat dissipation or reducing the output power of fan installation equipment.
When the idle fans are started, fan control strategies can be combined, for example, 10 fans need to be started according to the current fan control strategy, the number of actually-working fans is 8, and then 2 idle fans need to be started again under the condition that the condition allows. When the 2 idle fans can not be started, the MCU can control the output power of the fan installation equipment to be reduced to 80% of the output power of the fan installation equipment through the communication module.
In summary, the invention has the advantages that:
1. the MCU is respectively connected with the start-stop control circuit, the running state detection circuit and the running state indicating circuit, the MCU can detect the running state of the fan in real time through the running state detection circuit and the running state indicating circuit, and the running state of the fan (the fan is not switched on, the fan is normally lighted green, and the fan is abnormally lighted red) is indicated through the light emitting diode D1 of the running state indicating circuit.
2. The optocoupler K1 is arranged in the access state detection circuit to isolate high voltage and low voltage so as to solve the problem of incompatibility under different voltage working condition states.
3. By arranging the diode VD1 and the diode VD2, when the PVCC is reversely connected with the GND _ IN, the diode VD1 and the diode VD2 are IN a cut-off state, and the reverse connection protection effect is realized.
4. Through setting up fuse F1, when the short circuit of pin 1, 3 of binding post J1, fuse F1 will be in high resistance value state in the short time, cuts off the electric current in the circuit, plays overcurrent protection effect.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (10)
1. The utility model provides a multichannel fan state detection device which characterized in that: comprises an MCU and a plurality of fan control modules;
the fan control module comprises an access state detection circuit, a start-stop control circuit, an operation state detection circuit and an operation state indication circuit;
one end of the access state detection circuit is connected with the running state indication circuit, and the other end of the access state detection circuit is connected with the start-stop control circuit; one end of the running state detection circuit is connected with the start-stop control circuit, and the other end of the running state detection circuit is connected with the running state indication circuit; and the MCU is respectively connected with the start-stop control circuit, the running state detection circuit and the running state indication circuit.
2. The multi-channel fan condition detecting device of claim 1, wherein: the access state detection circuit comprises an optocoupler K1, a capacitor C1, a resistor R2, a resistor R3, a resistor R4, a triode Q1, a diode VD2 and a fuse F1;
an emitting electrode of the optocoupler K1 is connected with the running state indicating circuit, an anode of an input end is connected with a capacitor C1, a resistor R1 and a collector of the triode Q1, and a cathode of the input end is connected with the capacitor C1, the resistor R1 and a resistor R4; the base electrode of the triode Q1 is connected with the resistor R2, and the emitting electrode of the triode Q1 is connected with the input end of the diode VD 1; the input end of the diode VD2 is connected with the output end of the diode VD1 and the resistor R3, and the output end of the diode VD2 is connected with the resistor R2, the resistor R3 and the fuse F1; the fuse F1 is connected with the start-stop control circuit.
3. The multi-channel fan condition detection device of claim 1, further comprising: the start-stop control circuit comprises an optocoupler K2, a resistor R16, a resistor R17, a resistor R18 and an MOS (metal oxide semiconductor) transistor Q5;
the collector of the optocoupler K2 is connected with the resistor R16 and the resistor R18, the emitter is grounded, the anode of the input end is connected with the resistor R17, and the cathode of the input end is grounded; the resistor R17 is connected with the MCU; the grid electrode of the MOS tube Q5 is connected with the resistor R18, the source electrode of the MOS tube Q5 is connected with the access state detection circuit, and the drain electrode of the MOS tube Q5 is connected with the operation state detection circuit.
4. The multi-channel fan condition detection device of claim 1, further comprising: the operation state detection circuit comprises an MOS tube Q4, a diode D2, a diode D3, a diode D4, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a capacitor C3, a capacitor C4 and a connecting terminal J1;
the input end of the diode D2 is connected with the running state indicating circuit, and the output end of the diode D2 is connected with the drain electrode of the MOS tube Q4 and the output end of the diode D3; the grid electrode of the MOS tube Q4 is connected with the resistor R14, the capacitor C4, the output end of the diode D4, the resistor R13 and the running state indicating circuit, and the source electrode of the MOS tube Q4 is connected with the resistor R14, the capacitor C4, the input end of the diode D4 and the resistor R15 and is grounded; a pin 1 of the wiring terminal J1 is connected with the start-stop control circuit, a pin 2 is connected with a resistor R11 and a resistor R13, and a pin 3 is grounded; one end of the resistor R12 is connected with the input ends of the resistor R10, the capacitor C3 and the diode D3, and the other end of the resistor R12 is connected with the MCU.
5. The multi-channel fan condition detecting device of claim 1, wherein: the operating state indicating circuit comprises an MOS tube Q2, an MOS tube Q3, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C2 and a light emitting diode D1;
the input end of the light-emitting diode D1 is respectively connected with the resistor R8 and the resistor R9, and the output end of the light-emitting diode D1 is grounded; one end of the capacitor C2 is connected with the grid of the MOS tube Q2 and the operation state detection circuit, and the other end of the capacitor C2 is grounded;
the grid electrode of the MOS tube Q3 is connected with the resistor R5 and the running state detection circuit, the drain electrode of the MOS tube Q3 is connected with the resistor R8, and the source electrode of the MOS tube Q2 is connected with the resistor R5, the resistor R6 and the source electrode of the MOS tube Q2 and the access state detection circuit; the drain electrode of the MOS tube Q2 is connected with a resistor R9; one end of the resistor R7 is connected with the resistor R6 and the MCU, and the other end of the resistor R7 is grounded.
6. A multi-channel fan state detection method is characterized in that: the method requires the use of a test device according to any of claims 1 to 5, comprising the steps of:
s10, connecting the fan to a wiring terminal J1, and starting the fan by the MCU through the start-stop control module;
s20, when the running state indicating circuit detects that the fan runs normally through the running state detection circuit, the running state indicating circuit controls the light emitting diode D1 to light a green light;
step S30, the MCU detects the running state of the fan in real time through the running state indicating circuit and the running state detecting circuit, and the fan is closed through the start-stop control module when the fan runs abnormally;
step S40, the MCU periodically restarts the fan, verifies whether the fan is recovered to be normal or not, records the restart times, and triggers a fault alarm based on the restart times;
and S50, replacing the fan based on the fault alarm, and clearing the restart times.
7. The method of claim 6, wherein the method comprises: the step S10 specifically includes:
respectively connecting a FAN + pin, a FAN _ RD pin and a FAN-pin of the FAN to pins 1, 2 and 3 of a wiring terminal J1, and starting the FAN by the MCU through conducting an MOS (metal oxide semiconductor) tube Q5 of the start-stop control module;
the step S20 is specifically:
when the FAN operates normally, a low level is output to the wiring terminal J1 through a FAN _ RD pin and conducted to the grid electrode of the MOS tube Q2, the source electrode of the MOS tube Q2 is a high level, the grid electrode of the MOS tube Q2 is a low level, and then the high level is output through the drain electrode, and the light-emitting device on the right side of the light-emitting diode D1 is conducted to light a green lamp.
8. The method of claim 6, wherein the method comprises: the step S30 specifically includes:
when the MCU detects that the MCU _ FAN _ IN is at a low level, the poor contact between the FAN and the wiring terminal J1 is judged; when the MCU detects that the MCU _ FAN _ IN is at a high level and the MCU _ RD _ IN is at a low level, judging that the FAN normally operates; when the MCU detects that the MCU _ FAN _ IN is at a high level and the MCU _ RD _ IN is at a high level, judging that the FAN runs abnormally;
when the fan operates abnormally, the MCU turns off the MOS tube Q5 of the start-stop control module to close the fan.
9. The method of claim 6, wherein the method comprises: the step S40 specifically includes:
s41, the MCU sets a restart period and an alarm frequency threshold;
step S42, the MCU controls the FAN to periodically restart based on the restart period, whether the FAN is normal or not is judged by reading the MCU _ FAN _ IN signal and the MCU _ RD _ IN signal, and if yes, the FAN is enabled to keep running; if not, the process proceeds to step S43,
S43, recording the restarting times of the fan, judging whether the restarting times are larger than an alarm time threshold value, and if so, triggering a fault alarm; if not, the process proceeds to step S42.
10. The method of claim 6, wherein the method comprises: the step S20 further includes:
the method comprises the steps that an MCU (micro control unit) acquires the working temperature of fan installation equipment, and controls the start and stop of each fan based on the working temperature and a preset temperature threshold value;
the step S30 further includes:
and when the fan which is shut down due to abnormal operation exists, starting the idle fan to perform auxiliary heat dissipation or reducing the output power of fan installation equipment.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116661362A (en) * | 2023-07-31 | 2023-08-29 | 快克智能装备股份有限公司 | Self-adaptive control system and control method for multi-channel ion fan |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116661362A (en) * | 2023-07-31 | 2023-08-29 | 快克智能装备股份有限公司 | Self-adaptive control system and control method for multi-channel ion fan |
| CN116661362B (en) * | 2023-07-31 | 2023-10-03 | 快克智能装备股份有限公司 | Self-adaptive control system and control method for multi-channel ion fan |
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