CN2783383Y - Fan check controller - Google Patents
Fan check controller Download PDFInfo
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- CN2783383Y CN2783383Y CN 200420099281 CN200420099281U CN2783383Y CN 2783383 Y CN2783383 Y CN 2783383Y CN 200420099281 CN200420099281 CN 200420099281 CN 200420099281 U CN200420099281 U CN 200420099281U CN 2783383 Y CN2783383 Y CN 2783383Y
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- 238000001514 detection method Methods 0.000 claims abstract description 18
- 238000012360 testing method Methods 0.000 claims abstract description 17
- 238000002955 isolation Methods 0.000 claims abstract description 11
- 101100236764 Caenorhabditis elegans mcu-1 gene Proteins 0.000 claims abstract description 7
- 239000003990 capacitor Substances 0.000 description 8
- 102100027284 Fanconi-associated nuclease 1 Human genes 0.000 description 3
- 101000914689 Homo sapiens Fanconi-associated nuclease 1 Proteins 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 101100524751 Arabidopsis thaliana PYRR gene Proteins 0.000 description 2
- 101150101545 PHS1 gene Proteins 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 1
- 238000011990 functional testing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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Abstract
The utility model discloses a fan detecting controller, which adopts two MCS51 singlechips (MCU1, MCU2), and is provided with an isolation detecting module, a switching control circuit, a display, a PWM control circuit and an SPI interface at the periphery, wherein an isolation detecting control module comprises an isolating circuit which is composed of PC817 photoelectric isolation chips, and a detecting circuit; the switching control circuit is composed of a 74LS153 and a 74LS62; the PWM control circuit is composed of an SC1102CS form PWM chip. The fan testing controller of the utility model can simultaneously achieve the on-line circle detection of a plurality of fans in sequence through perfectly processing detection interfaces, so that the capability of processing is improved. Simultaneously, serial bus interfaces are processed through software means, so that automatic detection and the automatic acquisition of detection standards are achieved.
Description
1, technical field
The utility model relates to a kind of detecting device, and specifically a kind of fan detects controller.
2, technical background
Modern science and technology is at a tremendous pace, and the numerous various electronic equipments of kind are when research and development, all be accompanied by the semiconductor industry common development, in the hope of createing the product of high-tech, high precision, certainly, society when buy using every high-tech electronic equipment, the convenience and the stability that more require assembling to use.And along with the fast development of digital electronic device, most of electronic devices all are equiped with CPU (central processing unit) and the storage unit that runs up, yet, semiconductor element is when running up, the high temperature of its generation is quite surprising itself to element, and high temperature more will cause accurate semiconductor element to burn, therefore, temperature characterisitic when electronic equipment turns round for system is quite responsive and require quite strict, and at present each industrial community in every electronic equipment, all install one or several fans additional, temperature when turning round in order to the reduction system, yet for the electronic equipment that does not install any detection fan assembly additional, the duty that the user has no way of learning fan at all well whether, though known technology has improvement to this problem, but exist some shortcomings: only support single fan test, do not support the PWM functional test, only support the 3Pin fan, and do not have warning function.
3, summary of the invention
Technical assignment of the present utility model provides a kind of 3Pin of support and 4Pin DC fan, support the test of PWM speed-regulating function, support similar USB flash disk read in interface and equipment, detection efficiency height, fan that processing power is strong detects controller.
The technical scheme that its technical matters that solves the utility model adopts is: adopt two MCS51 single-chip microcomputers (MCU1, MCU2), outer periphery is equipped with isolation detection module, control switching circuit, display, pwm control circuit and SPI interface, the isolation detection control module comprises buffer circuit and testing circuit, buffer circuit is made up of the PC817 photoelectric isolated chip, control switching circuit is made up of 74LS153 and 74LS62, and pwm control circuit is made up of SC1102CS type PWM chip.Display is connected with MCS51 single-chip microcomputer (MCU2) with MCS51 single-chip microcomputer (MCU1), MCS51 single-chip microcomputer (MCU1) connects control switching circuit, MCS51 single-chip microcomputer (MCU2) connects SC1102CS type PWM chip, control switching circuit all is connected with the PC817 photoelectric isolated chip with SC1102CS type PWM chip, the PC817 photoelectric isolated chip is connected with testing circuit, and testing circuit is connected with fan.
The isolation detection module can be provided with in parallel 1～10 group.
Testing circuit is by pneumatics oscillator (U1), operational amplifier (U2), 12 resistance (R1-R12), three electric capacity (C1, C2, C3), three adjustable resistance (RP1, RP2, RP3), sensor (T), triode (VT1) is formed, the pin 1 of pneumatics oscillator (U1) joins with the pin 2 of operational amplifier (U2), the pin 2 of pneumatics oscillator (U1) joins with an end of resistance (R2), the pin 3 of pneumatics oscillator (U1) joins with an end of resistance (R6), pneumatics oscillator (U1) pin 4 ground connection, pneumatics oscillator (U1) pin 5 joins with an end of electric capacity (C1), the pin 6 of pneumatics oscillator (U1) joins with an end of resistance (R1), the pin 7 of pneumatics oscillator (U1) joins with the pin 6 of operational amplifier (U2), the pin 8 of pneumatics oscillator (U1) connects positive voltage, the pin 3 of operational amplifier (U2) joins with an end of resistance (R9), the pin 8 of operational amplifier (U2) joins with an end of electric capacity (C3), the other end ground connection of resistance (R1), one end of the other end of resistance (R2) and adjustable resistance (RP1) joins, the pin 8 of one end of resistance (R3) and pneumatics oscillator (U1) joins, the contact of the pin 6 of the other end of resistance (R3) and pneumatics oscillator (U1) and resistance (R1) joins, the contact of the pin 8 of one end of resistance (R4) and pneumatics oscillator (U1) and resistance (R3) joins, the contact of the pin 5 of the other end of resistance (R4) and pneumatics oscillator (U1) and electric capacity (C1) joins, the contact of the pin 3 of one end of resistance (R5) and pneumatics oscillator (U1) and resistance (R6) joins, another termination positive voltage of resistance (R5), the base stage of the other end of resistance (R6) and triode (VT1) is joined, the contact of the pin 2 of the pin 1 of one end of resistance (R7) and pneumatics oscillator (U1) and operational amplifier (U2) joins, one end of the other end of resistance (R7) and sensor (T) joins, the other end of one end of resistance (R8) and resistance (R9) joins, one end of the other end of resistance (R8) and adjustable resistance (RP3) joins, the contact of one end of resistance (R10) and resistance (R8) and resistance (R9) joins, the scalable end of the other end of resistance (R10) and adjustable resistance (RP2) joins, the end that one end of resistance (R11) and resistance (R5) connect positive voltage joins, an end of light emitting diode (PHS1) joins in the other end of resistance (R11) and the buffer circuit (PC817 photoelectric isolated chip), the contact of one end of resistance (R12) and resistance (R7) and sensor (T) joins, the other end of the other end of resistance (R12) and adjustable resistance (RP3) joins, the other end ground connection of electric capacity (C1), the contact of the pin 2 of the pin 1 of one end of electric capacity (C2) and pneumatics oscillator (U1) and operational amplifier (U2) joins, the contact of the pin 6 of the pin 7 of the other end of electric capacity (C2) and pneumatics oscillator (U1) and operational amplifier (U2) joins, the other end ground connection of electric capacity (C3), the other end ground connection of adjustable resistance (RP1), the two ends of adjustable resistance (RP2) connect positive voltage and negative voltage respectively, that end ground connection that adjustable resistance (RP3) and resistance (R8) join, another termination positive voltage of sensor (T), the other end of light emitting diode (PHS1) joins the grounded emitter of triode (VT1) in the collector of triode (VT1) and the buffer circuit (PC817 photoelectric isolated chip).
With SPI serial clock, data input and data output that the assembly language of MCS51 single-chip microcomputer is realized, step is as follows:
(1) the serial read-in programme that will execute the task in advance deposits in the program storage of MCS51 single-chip microcomputer;
(2) start this MCS51 Single Chip Microcomputer (SCM) system work, read fan performance index to be detected by fetch interface;
(3) read success, show preset parameter, and the fan parameter is placed predetermined storage unit, detect criterion as program;
(4) read failure, show that preset parameter is 0.
As follows with the SPI serial read-in programme that the assembly language of MCS51 type single-chip microcomputer is realized:
UB_276C：
MOV count_1，#00
JMP j279F
j2778：
mov a，para_1
ANL a，#80h
MOV count_2，a
cjne a，#00，j2788
Jmp j278b
j2788：
CALL SDA_1
JMP j278E
j278B：
CALL SDA_0
j278E：
CALL SCL_1
Mov a，para_1
Clr c
Rlc a
Mov para_1，a
CALL SCL_0
INC count_1
j279F：
mov a，count_1
cjne a，#08，j2778
CALL SDA_1
CALL SCL_1
CALL DEALY
CALL SCL_0
SUB_27C4
MOV count_2，#00
MOV count_1，#00
JMP j27FD
J27D4：
CALL SCL_1
MOV a，count_2
Clr c
Rlc a
MOV count_2，a
Mov a，p3
Anl a，#01h
Mov rw_data，a
CALL scl_0
Mov a，rw_data
Cjne a，#00h，j27f7
Jmp J27fa
J27f7：
Inc count_2
J27fa：
Inc count_1
J27FD：
Mov a，count_1
Cjne a，#08h，j27d4
MOV a，count_2
RET
SUB?29b6：
Mov a，para_1
Anl a，#0FFh
Mov addr_1，a
Mov a，#0a0h
Mov addr_h，a
Mov a，addr_h
Mov para_1，a
CALL SUB_273A
MOV a，addr_1
Mov para_1，a
CALL SUB_276c
Mov a，addrh
ORL a，#0A1h
MOV addr_h，a
Mov para_1，a
CALL SUB_273A
CALL SUB_27C4
MOV rw_data，a
CALL SUB_275B
Mov a，rw_data
RET
Fan of the present utility model detects controller and handles by perfect detection interface, can realize a plurality of fans online cycle detection in proper order simultaneously, improved processing power, utilize the means of software implementation simultaneously, serial bus interface is handled, realized that examination criteria obtains automatically, detect robotization, thereby, have good value for applications.
4, description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Accompanying drawing 1 detects each element connection status synoptic diagram of controller for fan;
Accompanying drawing 2 is the circuit diagram of the testing circuit of accompanying drawing 1.
5, embodiment
With reference to Figure of description fan of the present utility model being detected controller explains below doing.
Fan of the present utility model detects controller, adopt two MCS51 single-chip microprocessor MCU 1, MCU2, outer periphery is equipped with 4 groups of isolation detection modules, control switching circuit, display, pwm control circuit and SPI interface, the isolation detection control module comprises buffer circuit and testing circuit, buffer circuit is made up of the PC817 photoelectric isolated chip, control switching circuit is made up of 74LS153 and 74LS62, and pwm control circuit is made up of SC1102CS type PWM chip.Display is connected with MCS51 single-chip microprocessor MCU 2 with MCS51 single-chip microprocessor MCU 1, MCS51 single-chip microprocessor MCU 1 connects control switching circuit, MCS51 single-chip microprocessor MCU 2 connects SC1102CS type PWM chip, control switching circuit all is connected with the PC817 photoelectric isolated chip with SC1102CS type PWM chip, the PC817 photoelectric isolated chip is connected with testing circuit, and testing circuit is connected with fan.
Testing circuit is by pneumatics oscillator U1, operational amplifier U2,12 resistance R 1～R12, three capacitor C 1, C2, C3, three adjustable resistance RP1, RP2, RP3, sensor T, triode VT1 forms, the pin 1 of pneumatics oscillator U1 joins with the pin 2 of operational amplifier U2, the pin 2 of pneumatics oscillator U1 joins with an end of resistance R 2, the pin 3 of pneumatics oscillator U1 joins with an end of resistance R 6, pneumatics oscillator U1 pin 4 ground connection, pneumatics oscillator U1 pin 5 joins with an end of capacitor C 1, the pin 6 of pneumatics oscillator U1 joins with an end of resistance R 1, the pin 7 of pneumatics oscillator U1 joins with the pin 6 of operational amplifier U2, the pin 8 of pneumatics oscillator U1 connects positive voltage, the pin 3 of operational amplifier U2 joins with an end of resistance R 9, the pin 8 of operational amplifier U2 joins with an end of capacitor C 3, the other end ground connection of resistance R 1, the end of the other end of resistance R 2 and adjustable resistance RP1 joins, the pin 8 of one end of resistance R 3 and pneumatics oscillator U1 joins, the pin 6 of the other end of resistance R 3 and pneumatics oscillator U1 and the contact of resistance R 1 join, the pin 8 of one end of resistance R 4 and pneumatics oscillator U1 and the contact of resistance R 3 join, the pin 5 of the other end of resistance R 4 and pneumatics oscillator U1 and the contact of capacitor C 1 join, the pin 3 of one end of resistance R 5 and pneumatics oscillator U1 and the contact of resistance R 6 join, another termination positive voltage of resistance R 5, the base stage of the other end of resistance R 6 and triode VT1 is joined, the contact of the pin 1 of one end of resistance R 7 and pneumatics oscillator U1 and the pin 2 of operational amplifier U2 joins, the end of the other end of resistance R 7 and sensor T joins, one end of resistance R 8 and the other end of resistance R 9 join, the end of the other end of resistance R 8 and adjustable resistance RP3 joins, the contact of one end of resistance R 10 and resistance R 8 and resistance R 9 joins, the scalable end of the other end of resistance R 10 and adjustable resistance RP2 joins, the end that one end of resistance R 11 and resistance R 5 connect positive voltage joins, the end of LED P HS1 joins in the other end of resistance R 11 and the buffer circuit PC817 photoelectric isolated chip, the contact of one end of resistance R 12 and resistance R 7 and sensor T joins, the other end of the other end of resistance R 12 and adjustable resistance RP3 joins, the other end ground connection of capacitor C 1, the contact of the pin 1 of one end of capacitor C 2 and pneumatics oscillator U1 and the pin 2 of operational amplifier U2 joins, the contact of the pin 7 of the other end of capacitor C 2 and pneumatics oscillator U1 and the pin 6 of operational amplifier U2 joins, the other end ground connection of capacitor C 3, the other end ground connection of adjustable resistance RP1, the two ends of adjustable resistance RP2 connect positive voltage and negative voltage respectively, that end ground connection that adjustable resistance RP3 and resistance R 8 are joined, another termination positive voltage of sensor T, the other end of LED P HS1 joins the grounded emitter of triode VT1 in the collector of triode VT1 and the buffer circuit PC817 photoelectric isolated chip.
With SPI serial clock, data input and data output that the assembly language of MCS51 type single-chip microcomputer is realized, step is as follows:
(1) the serial read-in programme that will execute the task in advance deposits in the program storage of MCS51 type single-chip microcomputer;
(2) start this MCS51 type Single Chip Microcomputer (SCM) system work, read fan performance index to be detected by fetch interface;
(3) read success, show preset parameter, and the fan parameter is placed predetermined storage unit, detect criterion as program;
(4) read failure, show that preset parameter is 0.
As follows with the SPI serial read-in programme that the assembly language of MCS51 type single-chip microcomputer is realized:
UB_276C：
MOV count_1，#00
JMP j279F
j2778：
mov a，para_1
ANL a，#80h
MOV count_2，a
cjne a，#00，j2788
Jmp j278b
j2788：
CALL SDA_1
JMP j278E
j278B：
CALL SDA_0
j278E：
CALL SCL_1
Mov a，para_1
Clr c
Rlc a
Mov para_1，a
CALL SCL_0
INC count_1
j279F：
mov a，count_1
cjne a，#08，j2778
CALL SDA_1
CALL SCL_1
CALL DEALY
CALL SCL_0
SUB_27C4
MOV count_2，#00
MOV count_1，#00
JMP j27FD
J27D4：
CALL SCL_1
MOV a，count_2
Clr c
Rlc a
MOV count_2，a
Mov a，p3
Anl a，#011h
Mov rw_data，a
CALL scl_0
Mov a，rw_data
Cjne a，#00h，27f7
Jmp J27fa
J27f7：
Inc count_2
J27fa：
Inc count_1
J27FD：
Mov a，count_1
Cjne a，#08h，j27d4
MOV a，count_2
RET
SUB_29b6：
Mov a，para_1
Anl a，#0FFh
Mov addr_1，a
Mov a，#0a0h
Mov addr_h，a
Mov a，add_h
Mov para_1，a
CALL SUB_273A
MOV a，addt_1
Mov para_1，a
CALL SUB_276c
Mov a，addr_h
ORL a，#0A1h
MOV addr_h，a
Mov para_1，a
CALL SUB_273A
CALL SUB_27C4
MOV rw_data，a
CALL SUB_275B
Mov a，rw_data
RET
Add some points after the startup, all fans start simultaneously, and system delay 30 seconds waits for that fan enters the speed stabilizing duty.At first indication detects FAN1, keeps 30 seconds detection times, and shows rotating speed in real time, overproof alarm; Switch indication then and detect FAN2, keep 30 seconds detection times, and show rotating speed in real time, overproof alarm; Switch indication then and detect FAN3;---FAN2---FAN3---FAN4---loop test between FAN1 successively at FAN1.
It is very simple and convenient that fan of the present utility model detects its processing and fabricating of controller, and processing and fabricating gets final product shown in the by specification accompanying drawing.
Except that the described technical characterictic of instructions, be the known technology of those skilled in the art.
Claims (4)
1, fan detects controller, it is characterized in that adopting two MCS51 single-chip microprocessor MCU 1, MCU2, outer periphery is equipped with the isolation detection module, control switching circuit, display, pwm control circuit and SPI interface, the isolation detection control module comprises buffer circuit and testing circuit, buffer circuit is made up of the PC817 photoelectric isolated chip, control switching circuit is made up of 74LS153 and 74LS62, pwm control circuit is made up of SC1102CS type PWM chip, display is connected with MCS51 single-chip microprocessor MCU 2 with MCS51 single-chip microprocessor MCU 1, MCS51 single-chip microprocessor MCU 1 connects control switching circuit, MCS51 single-chip microprocessor MCU 2 connects SC1102CS type PWM chip, control switching circuit all is connected with the PC817 photoelectric isolated chip with SC1102CS type PWM chip, the PC817 photoelectric isolated chip is connected with testing circuit, and testing circuit is connected with fan.
2, fan according to claim 1 detects controller, it is characterized in that the isolation detection module can be provided with in parallel 1～10 group.
3, fan according to claim 1 detects controller, it is characterized in that testing circuit is by pneumatics oscillator (U1), operational amplifier (U2), 12 resistance (R1-R12), three electric capacity (C1, C2, C3), three adjustable resistance (RP1, RP2, RP3), sensor (T), triode (VT1) is formed, the pin 1 of pneumatics oscillator (U1) joins with the pin 2 of operational amplifier (U2), the pin 2 of pneumatics oscillator (U1) joins with an end of resistance (R2), the pin 3 of pneumatics oscillator (U1) joins with an end of resistance (R6), pneumatics oscillator (U1) pin 4 ground connection, pneumatics oscillator (U1) pin 5 joins with an end of electric capacity (C1), the pin 6 of pneumatics oscillator (U1) joins with an end of resistance (R1), the pin 7 of pneumatics oscillator (U1) joins with the pin 6 of operational amplifier (U2), the pin 8 of pneumatics oscillator (U1) connects positive voltage, the pin 3 of operational amplifier (U2) joins with an end of resistance (R9), the pin 8 of operational amplifier (U2) joins with an end of electric capacity (C3), the other end ground connection of resistance (R1), one end of the other end of resistance (R2) and adjustable resistance (RP1) joins, the pin 8 of one end of resistance (R3) and pneumatics oscillator (U1) joins, the contact of the pin 6 of the other end of resistance (R3) and pneumatics oscillator (U1) and resistance (R1) joins, the contact of the pin 8 of one end of resistance (R4) and pneumatics oscillator (U1) and resistance (R3) joins, the contact of the pin 5 of the other end of resistance (R4) and pneumatics oscillator (U1) and electric capacity (C1) joins, the contact of the pin 3 of one end of resistance (R5) and pneumatics oscillator (U1) and resistance (R6) joins, another termination positive voltage of resistance (R5), the base stage of the other end of resistance (R6) and triode (VT1) is joined, the contact of the pin 2 of the pin 1 of one end of resistance (R7) and pneumatics oscillator (U1) and operational amplifier (U2) joins, one end of the other end of resistance (R7) and sensor (T) joins, the other end of one end of resistance (R8) and resistance (R9) joins, one end of the other end of resistance (R8) and adjustable resistance (RP3) joins, the contact of one end of resistance (R10) and resistance (R8) and resistance (R9) joins, the scalable end of the other end of resistance (R10) and adjustable resistance (RP2) joins, the end that one end of resistance (R11) and resistance (R5) connect positive voltage joins, the end of LED P HS1 joins in the other end of resistance (R11) and the PC817 photoelectric isolated chip, the contact of one end of resistance (R12) and resistance (R7) and sensor (T) joins, the other end of the other end of resistance (R12) and adjustable resistance (RP3) joins, the other end ground connection of electric capacity (C1), the contact of the pin 2 of the pin 1 of one end of electric capacity (C2) and pneumatics oscillator (U1) and operational amplifier (U2) joins, the contact of the pin 6 of the pin 7 of the other end of electric capacity (C2) and pneumatics oscillator (U1) and operational amplifier (U2) joins, the other end ground connection of electric capacity (C3), the other end ground connection of adjustable resistance (RP1), the two ends of adjustable resistance (RP2) connect positive voltage and negative voltage respectively, that end ground connection that adjustable resistance (RP3) and resistance (R8) join, another termination positive voltage of sensor (T), the other end of LED P HS1 joins in the collector of triode (VT1) and the buffer circuit PC817 photoelectric isolated chip, the grounded emitter of triode (VT1).
4, fan according to claim 1 detects controller, it is characterized in that the SPI serial clock, data input and the data output that realize with the assembly language of MCS51 single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420099281 CN2783383Y (en) | 2004-12-30 | 2004-12-30 | Fan check controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420099281 CN2783383Y (en) | 2004-12-30 | 2004-12-30 | Fan check controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2783383Y true CN2783383Y (en) | 2006-05-24 |
Family
ID=36768366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420099281 Expired - Fee Related CN2783383Y (en) | 2004-12-30 | 2004-12-30 | Fan check controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2783383Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281398B (en) * | 2007-04-05 | 2010-05-19 | 环达电脑(上海)有限公司 | Method and system for monitoring rotary speed signal of multiple fans |
| CN101533052B (en) * | 2008-03-14 | 2012-01-25 | 鸿富锦精密工业（深圳）有限公司 | Testing system and method for PWM fan electrical performance |
| CN103234276A (en) * | 2013-04-29 | 2013-08-07 | 王金波 | Control device of domestic intelligent electric control fan heater |
| CN106771325A (en) * | 2016-12-02 | 2017-05-31 | 郑州云海信息技术有限公司 | A kind of method and device based on the detection of monolithic processor controlled server fan rotating speed |
-
2004
- 2004-12-30 CN CN 200420099281 patent/CN2783383Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281398B (en) * | 2007-04-05 | 2010-05-19 | 环达电脑(上海)有限公司 | Method and system for monitoring rotary speed signal of multiple fans |
| CN101533052B (en) * | 2008-03-14 | 2012-01-25 | 鸿富锦精密工业（深圳）有限公司 | Testing system and method for PWM fan electrical performance |
| CN103234276A (en) * | 2013-04-29 | 2013-08-07 | 王金波 | Control device of domestic intelligent electric control fan heater |
| CN106771325A (en) * | 2016-12-02 | 2017-05-31 | 郑州云海信息技术有限公司 | A kind of method and device based on the detection of monolithic processor controlled server fan rotating speed |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |