CN110017367A - The intelligent monitor system of automobile transmission lubrication oil - Google Patents
The intelligent monitor system of automobile transmission lubrication oil Download PDFInfo
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- CN110017367A CN110017367A CN201910309144.8A CN201910309144A CN110017367A CN 110017367 A CN110017367 A CN 110017367A CN 201910309144 A CN201910309144 A CN 201910309144A CN 110017367 A CN110017367 A CN 110017367A
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- resistance
- transporting discharging
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
- F16H57/0435—Pressure control for supplying lubricant; Circuits or valves therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N29/00—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N2250/00—Measuring
- F16N2250/04—Pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N2250/00—Measuring
- F16N2250/08—Temperature
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention discloses a kind of intelligent monitor systems of automobile transmission lubrication oil, including central processing unit, humidity sensor, temperature sensor, the first A/D converter circuit, memory, display device, the second A/D converter circuit, signal processing circuit and pressure sensor；Temperature sensor is used to detect the temperature signal of speed changer internal lubrication oil, and is sent to central processing unit after the processing of the first A/D converter circuit；Humidity sensor is used to detect the moisture signal of speed changer internal lubrication oil, and is sent to central processing unit after the processing of the first A/D converter circuit；Pressure sensor is used to detect the pressure signal of speed changer internal lubrication oil, and is sent to central processing unit after signal processing circuit and the processing of the second A/D converter circuit；Temperature signal, moisture signal and pressure signal are transmitted to display device and memory by central processing unit.The present invention can temperature signal to speed changer internal lubrication oil, moisture signal and pressure signal carry out real-time monitoring.
Description
Technical field
The present invention relates to automobile intelligent monitoring technical fields, and in particular to a kind of intellectual monitoring of automobile transmission lubrication oil
System.
Background technique
Automotive transmission is the mechanism for changing rotating speed of automobile engine and torque, is the weight of automotive power transmission system
Want critical component.Speed changer has deceleration torque increase, realizes reversing, realize turning, output power, interrupt the major functions such as power.
The state of speed changer has vital effect to the safe normally travel of automobile.High oil temperature too low will affect
The problems such as transmission efficiency and lubricating efficiency of speed changer can also promote oil liquid premature oxidation, and there may be operating clamping stagnations.Oil pressure
The too high or too low shift time that can seriously affect speed changer, or even it is unable to complete necessary shift.Speed changer is in use process
In also will appear oil leakage phenomenon, causing such case to be likely to be case of transmission deformation or rupture causes or gasket seal
Aging, breakage.
Speed changer is installed below automobile chassis, and most of drivers will not notice abnormal feelings in use
Condition.Speed changer needs maintenance, if speed changer components lose the effectively lubricating of lubricating oil, will cause speed changer
Each irreversible damage of components can not only cause huge economic loss to car owner, or even can also drive to what is driven
The person of sailing or passenger bring security risk.
Therefore, it is necessary to develop a kind of intelligent monitor system of automobile transmission lubrication oil.
Summary of the invention
The object of the present invention is to provide a kind of intelligent monitor systems of automobile transmission lubrication oil, can moisten to speed changer inside
Temperature signal, moisture signal and the pressure signal of lubricating oil carry out real-time monitoring.
A kind of intelligent monitor system of automobile transmission lubrication oil of the present invention, including central processing unit, humidity
Sensor, temperature sensor, the first A/D converter circuit, memory, display device, the second A/D converter circuit, signal processing circuit
And pressure sensor；
The temperature sensor is used to detect the temperature signal of speed changer internal lubrication oil, and through the first A/D converter circuit at
Central processing unit is sent to after reason；The humidity sensor is used to detect the moisture signal of speed changer internal lubrication oil, and passes through
Central processing unit is sent to after the processing of first A/D converter circuit；The temperature sensor and humidity sensor respectively with the first AD
Conversion circuit connection, the first A/D converter circuit are connect with the central processing unit；
The pressure sensor is used to detect the pressure signal of speed changer internal lubrication oil, and through signal processing circuit and the
It is sent to central processing unit after the processing of two A/D converter circuits, which connect with signal processing circuit, signal processing
Circuit is connect with the second A/D converter circuit, and the second A/D converter circuit is connect with central processing unit；
The central processing unit is used to for the temperature signal, moisture signal and pressure signal that receive being transmitted to described
Display device is shown, and the temperature signal received, moisture signal and pressure signal are transmitted to the memory
It is stored；The central processing unit is connect with display device and memory respectively.
Further, the signal processing circuit includes signal amplification unit and signal filter unit, the pressure sensor
Output end and the input terminal of signal amplification unit connect, the input terminal of the output end of signal amplification unit and signal filter unit
Connection, the output end of signal filter unit are connect with the second A/D converter circuit；The signal processing circuit is to the pressure received
Signal is transmitted to second A/D converter circuit after successively carrying out signal amplification and signal filtering processing.
Further, the signal amplification unit includes integrated transporting discharging A1- integrated transporting discharging A4 and resistance R1- resistance R14；
Wherein, the output end of the pressure sensor respectively with the non-inverting input terminal of integrated transporting discharging A3, integrated transporting discharging A2
Non-inverting input terminal, the connection of the non-inverting input terminal of integrated transporting discharging A1；
The inverting input terminal of the integrated transporting discharging A1 is grounded after resistance R1, the inverting input terminal and resistance of integrated transporting discharging A1
Tie point between R1 is connect through resistance R2 with the output end of integrated transporting discharging A1, and the output end of integrated transporting discharging A1 is also successively through resistance
It is grounded after R3, resistance R11, resistance R13 and resistance R12, the tie point between resistance R11 and resistance R13 is with integrated transporting discharging A4's
Output end connection；
The inverting input terminal of the integrated transporting discharging A2 is grounded after resistance R4, the inverting input terminal and resistance of integrated transporting discharging A2
Tie point between R4 is connect through resistance R5 with the output end of integrated transporting discharging A2, and the output end of integrated transporting discharging A2 is also successively through resistance
It is connect after R6, resistance R10 with the non-inverting input terminal of integrated transporting discharging A4, the tie point between resistance R6 and resistance R10 and resistance R3
Tie point connection between resistance R11；
The inverting input terminal of the integrated transporting discharging A3 is grounded after resistance R7, the inverting input terminal and resistance of integrated transporting discharging A3
Tie point between R7 is connect through resistance R8 with the output end of integrated transporting discharging A3, the output end of integrated transporting discharging A3 also through resistance R9 with
Tie point connection between resistance R6 and resistance R10；
The reverse input end of the integrated transporting discharging A4 is grounded, and the output end of integrated transporting discharging A4 is through resistance R14 and the signal
The input terminal of filter unit connects.
Further, the signal filter unit includes resistance R15- resistance R28, capacitor C1- capacitor C12 and integrated transporting discharging
A5- integrated transporting discharging A6；
Wherein, the output end of the signal amplification unit is connect with one end of resistance R15, the signal amplification unit it is defeated
Outlet is also connect with one end of capacitor C1, the other end of the capacitor C1 successively other end through capacitor C2, resistance R16 and resistance R15
Connection, the tie point between resistance R16 and resistance R15 are grounded after capacitor C3, the tie point warp between capacitor C2 and resistance R16
It is grounded after resistance R18, the tie point between capacitor C2 and resistance R16 is also connect with the non-inverting input terminal of integrated transporting discharging A5, is integrated
The non-inverting input terminal of amplifier A5 is also grounded after capacitor C4, and the reverse input end of integrated transporting discharging A5 is grounded after resistance R20, is integrated
The reverse input end of amplifier A5 is also connect after resistance R19 with the output end of integrated transporting discharging A5, and capacitor C5 is in parallel with resistance R19,
The output end of integrated transporting discharging A5 is also connected through the tie point between resistance R17 and capacitor C1 and capacitor C2, and integrated transporting discharging A5's is defeated
Outlet is also successively grounded after resistance R21 and capacitor C6；
The output end of the integrated transporting discharging A5 is connect with one end of resistance R22, the output end of the integrated transporting discharging A5 also with
One end of capacitor C7 connects, and the other end of capacitor C7 is successively connect through capacitor C8, resistance R23 with the other end of resistance R22, resistance
Tie point between R23 and resistance R22 is grounded after capacitor C9, and the tie point between capacitor C8 and resistance R23 is after resistance R25
Ground connection, the tie point between capacitor C8 and resistance R23 are also connect with the non-inverting input terminal of integrated transporting discharging A6, and integrated transporting discharging A6's is same
Phase input terminal is also grounded after capacitor C10, and the reverse input end of integrated transporting discharging A6 is grounded after resistance R27, integrated transporting discharging A6's
Reverse input end is also connect after resistance R26 with the output end of integrated transporting discharging A6, and capacitor C11 is in parallel with resistance R26, integrated transporting discharging
Tie point of the output end of A6 also after resistance R24 between capacitor C7 and capacitor C8 is connect, and the output end of integrated transporting discharging A6 is also
Successively it is grounded after resistance R28, capacitor C12；
The output end of the integrated transporting discharging A6 is also connect with the second A/D converter circuit, after the signal filter unit will be handled
Voltage signal V1 the central processing unit is transmitted to by second A/D converter circuit.
Further, the temperature sensor uses platinum resistance temperature sensor, by the variation of platinum resistance resistance value to temperature
It is monitored, the temperature that the central processing unit analyzes the speed changer internal lubrication oil to the temperature signal received becomes
Change, wherein temperature is calculated by following formula:
R=R (0 DEG C)+At+Bt (t-100 DEG C)+Ct2(t-100℃)+Dt3(t-100℃)+Et4(t-100℃)；
Wherein, R is the real-time resistance value of platinum resistance, and (0 DEG C) of R is resistance value of the platinum resistance at 0 DEG C, and t is temperature value to be measured,
A=4.18 × 0.001, B=-9.41 × 0.00000001, C=1.33 × 0.000000001, D=-3.92 ×
0.0000000001, E=8.72 × 0.00000000001.
Further, the moisture signal of the humidity sensor acquisition is x (n), and n is positive integer, the central processing unit
Drift compensation is carried out to humidity by following formula to the moisture signal received:
Y (n)=x (n) * h (n)；
Wherein, h (n) is drift penalty function, and δ is drift regulating constant, and compensation effect is adjusted by δ, and y (n) is
By the compensated moisture signal of drift.
It further, further include the clock circuit and E2PROM being connect respectively with central processing unit.
It further, further include the ECP Extended Capabilities Port being connect with central processing unit.
Further, the humidity sensor uses capacitive relative humidity sensor.
The present invention have it is following the utility model has the advantages that
(1) temperature signal, moisture signal and the pressure signal of speed changer internal lubrication oil can be monitored, and will
Measure signal be transmitted to display device carry out display and memory stored, allow users to obtain transmission information in real time,
To realize the real-time monitoring to speed changer.
(2) since the signal of pressure sensor acquisition is faint voltage signal, thus signal amplification unit is by integrating
Amplifier A1-A4 and resistance R1-R14 amplifies processing to the voltage V0 that pressure sensor exports, by integrated transporting discharging A1-A4 and electricity
The signal amplification unit that resistance R1-R14 is constituted only have offset within the drift of 0.1 μ V/ DEG C, 2 μ V, 100pA bias current and
The noise of 40nV in the broadband 0.1Hz to 10Hz.Wherein, signal filter unit uses resistance R15-R28, capacitor C1-C12 and collection
Low-pass filtering treatment is carried out to by amplified voltage signal at amplifier A5-A6, to improve the precision of pressure detecting.
Detailed description of the invention
Fig. 1 is the principle of the present invention block diagram；
Fig. 2 is the circuit diagram of signal processing circuit in the present invention；
In figure: 1- central processing unit；2- humidity sensor；3- temperature sensor；The first A/D converter circuit of 4-, 5- storage
Device, 6- ECP Extended Capabilities Port, 7- display device, the second A/D converter circuit of 8-, 9, signal processing circuit, 10- pressure sensor；11-
E2PROM, 12- clock circuit.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawing.
As shown in Figure 1, a kind of intelligent monitor system of automobile transmission lubrication oil, including central processing unit 1, humidity pass
Sensor 2, temperature sensor 3, the first A/D converter circuit 4, memory 5, display device 7, the second A/D converter circuit 8, signal processing
Circuit 9 and pressure sensor 10.Wherein, the temperature sensor 3 is used to detect the temperature signal of speed changer internal lubrication oil, and
Central processing unit 1 is sent to after the processing of the first A/D converter circuit 4.The humidity sensor 2 is for detecting inside speed changer
The moisture signal of lubricating oil, and central processing unit 1 is sent to after the processing of the first A/D converter circuit 4.The temperature sensor 3
It is connect respectively with the first A/D converter circuit 4 with humidity sensor 2, the first A/D converter circuit 4 connects with the central processing unit 1
It connects.The pressure sensor 10 is used to detect the pressure signal of speed changer internal lubrication oil, and through signal processing circuit 9 and second
Central processing unit 1 is sent to after the processing of A/D converter circuit 8.The pressure sensor 10 is connect with signal processing circuit 9, at signal
Reason circuit 9 is connect with the second A/D converter circuit 8, and the second A/D converter circuit 8 is connect with central processing unit 1.The central processing
Device 1 is used to the temperature signal, moisture signal and pressure signal that receive being transmitted to the display device 7 and show,
And the temperature signal received, moisture signal and pressure signal are transmitted to the memory 5 and stored；The centre
Reason device 1 is connect with display device 7 and memory 5 respectively.
The present invention can supervise in real time temperature signal, moisture signal and the pressure signal of speed changer internal lubrication oil
Survey, and will measure signal be transmitted to display device 7 carry out display and memory 5 store, allow users in real time obtain become
Fast device information, to realize the real-time monitoring to speed changer.
In the present embodiment, the first A/D converter circuit 4 and the second A/D converter circuit 8 are all made of 16 successive approximation ADC
(AD976/AD976A), compared with 8 and 12 converters, 16 ADC can more meet in the higher occasion of required precision
Design requirement.AD976/AD976A is a 16 high-precisions, the height that analog device (Analog Device) company releases
Speed, low-power consumption ADC.Using successive approximation working principle, single+5V power supply, single channel is inputted, and input voltage range is +/-
10V, sampling rate 100KSPS, AD976A 200KSPS.
In the present embodiment, central processing unit 1 uses AM1808 processor, and AM1808 processor is Texas Instruments
(TI) completely new high-performance arm processor is released, this chip possesses peripheral resources and industry abundant ARM9 least in power-consuming
One of processor can sufficiently meet high energy efficiency, connectivity design to high integration peripheral hardware, dissipation more low in calories and longer battery
The demand of service life.Not only have universal parallel port (uPP), while being also that TI integrates Serial Advanced Technology Attachment in the first batch
(SATA) device.
AM1808 processor (the compatible TMS320C6748 of Pin to Pin, OMAPL138 processor), dominant frequency 456MHz；
128/256MByte technical grade DDR2 or 128M/256M/512MByteNAND Flash can be used as memory；1, band
3.5mm Line in audio input interface, 1 3.5mm Mic in audio input interface, 1 3.5mm Line out audio are defeated
Outgoing interface；UART1,3 line serial ports, RS232 level；UART2,3 line serial ports, RS232 level；1 RS485 interface (RS485 and
UART1 multiplexing)；1x USB2.0OTG (Mini USB-B female seat interface)；4x USB1.1HOST (2x bilayer USB Type A
Seat)；1 standard SD card seat (SD/MMC signal supports 1.8V and 3.3V logic voltage)；1 10/100Mbps Ethernet connects
Mouth (RJ45 connector)；1 SATA interface (7pin SATA hard disc interface)；1 RTC (RC1220RTC)；1 JTAG connects
Mouth (14Pin TI Rev B jtag interface)；1 road spi bus；1 road iic bus；1 road UART signal；1 road VPIF bus；1 tunnel
UPP bus；1 road EMIF bus；Settable multiple GPIO；1 uneven bottoms key；1 programmable key；1 reset is pressed
Key；2 power supply indicators；1 system indicator；4 programmable indicator lights；One USB interface；One 24bit true color LCD
(50pinFPC arranges seat to interface；Containing 4 resistance-type line touch screen interfaces, resolution ratio can support 1366x768).
Operating voltage: 3.8V~5.5V (representative value: 5V)；Operating temperature: -45 DEG C~85 DEG C；Ambient humidity: 20%~
90%, non-condensing；Development board: 180mm*130mm；Core board: 55mm*33mm；Voltage: 5V；Electric current: 232mA；Power consumption:
1.16W。
It further include that the clock circuit 12 connecting respectively with central processing unit 1 and E2PROM11 (refer to electrification in the present embodiment
Erasable programmable read-only memory).Wherein, clock circuit 12 provides required starting of oscillation clock frequency for arm processor, ensures it
Stable operation.E2PROM11 main function is storage software of the invention required important parameter in the process of running.
In the present embodiment, the memory 5 extended out is FALSE memory, and the model SPR4096A of use is mainly used to deposit
Storage and backup original file data information.
SPR4096A has the feature that the memory space of 512K × 8；The SRAM of embedded 4K × 8；Outer CPU can
The voltage range of Flash/SRAM:I/O interface is accessed by serial line interface or 8 parallel-by-bit interfaces as 2.25~3.6V, and
Support the battery saving mode of stand by；The cost of system can be substantially reduced.
When in use, in data handling procedure, arm processor combination random access memory and FALSE memory can be effectively complete
At data exchange, to reach good data process effects；Can on effective guarantee 110KV electrical power transmission system for carrying out
The normal operation of the microsystem safety and stability of operation management, and can find in time transmission line with the presence or absence of short circuit or
Open circuit fault, it is ensured that transmission line normal operation, entire circuit have that design is scientific and reasonable, safety and stability, practical etc.
Feature；In such a way that multiple memorizers combine, it can be needed according to different data processings and select different memories,
To ensure the good result of data processing；The FLASH memory can be effectively performed data backup storage, in case the later period into
Row information is had access to etc. evidence-based when operation.
In the present embodiment, temperature sensor 3 uses platinum resistance temperature sensor, by the variation of platinum resistance resistance value to temperature
It is monitored, temperature change of the central processing unit 1 to the temperature signal analysis speed changer internal lubrication oil received, wherein
Temperature is calculated by following formula:
R=R (0 DEG C)+At+Bt (t-100 DEG C)+Ct2(t-100℃)+Dt3(t-100℃)+Et4(t-100℃)；
In the present embodiment, R is the real-time resistance value of platinum resistance, and (0 DEG C) of R is resistance value of the platinum resistance at 0 DEG C, and t is to be measured
Temperature value, A=4.18 × 0.001, B=-9.41 × 0.00000001, C=1.33 × 0.000000001, D=-3.92 ×
0.0000000001, E=8.72 × 0.00000000001.
Specifically, the moisture signal that humidity sensor 2 acquires is x (n), and n is positive integer, 1 pair of central processing unit reception
The moisture signal arrived carries out drift compensation to humidity by following formula:
Y (n)=x (n) * h (n)；
Wherein, h (n) is drift penalty function, and δ is drift regulating constant, and compensation effect is adjusted by δ, and y (n) is
By the compensated moisture signal of drift.
In the present embodiment, collected pressure signal is transmitted to signal processing circuit 9, signal processing by pressure sensor 10
Circuit 9 is transmitted to central processing unit 1 after successively carrying out signal amplification and signal filtering processing to the pressure signal received.
As shown in Fig. 2, pressure sensor 10 is used to detect the pressure signal of speed changer internal lubrication oil, by the pressure of acquisition
Signal is converted to voltage signal V0, and voltage signal V0 is transmitted to signal processing circuit 9, and V1 is by signal processing circuit 9
Treated voltage signal.
In the present embodiment, the signal processing circuit 9 includes signal amplification unit and signal filter unit, and the pressure passes
The output end of sensor 10 and the input terminal of signal amplification unit connect, output end and the signal filter unit of signal amplification unit
Input terminal connection, the output end of signal filter unit are connect with the second A/D converter circuit 8；9 pairs of signal processing circuit receptions
To pressure signal successively carry out signal amplification and signal filtering processing after be transmitted to second A/D converter circuit 8.
As shown in Fig. 2, the signal amplification unit includes integrated transporting discharging A1- integrated transporting discharging A4 and resistance R1- resistance R14,
The connection relationship of above each component is as follows:
The output end of the pressure sensor 10 respectively with the non-inverting input terminal of integrated transporting discharging A3, the same phase of integrated transporting discharging A2
The non-inverting input terminal connection of input terminal, integrated transporting discharging A1.The inverting input terminal of the integrated transporting discharging A1 is grounded after resistance R1, collection
It connect, integrates with the output end of integrated transporting discharging A1 through resistance R2 at the tie point between the inverting input terminal and resistance R1 of amplifier A1
The output end of amplifier A1 is also successively grounded after resistance R3, resistance R11, resistance R13 and resistance R12, resistance R11 and resistance R13
Between tie point connect with the output end of integrated transporting discharging A4.The inverting input terminal of the integrated transporting discharging A2 is followed by through resistance R4
Ground, the tie point between the inverting input terminal and resistance R4 of integrated transporting discharging A2 connect through the output end of resistance R5 and integrated transporting discharging A2
It connects, the output end of integrated transporting discharging A2 is also successively connect after resistance R6, resistance R10 with the non-inverting input terminal of integrated transporting discharging A4, electricity
Hinder the tie point connection between the tie point and resistance R3 and resistance R11 between R6 and resistance R10.The integrated transporting discharging A3's is anti-
Phase input terminal is grounded after resistance R7, and the tie point between the inverting input terminal and resistance R7 of integrated transporting discharging A3 is through resistance R8 and collection
It is connected at the output end of amplifier A3, the output end of integrated transporting discharging A3 is also through the connection between resistance R9 and resistance R6 and resistance R10
Point connection.The reverse input end of the integrated transporting discharging A4 is grounded, and the output end of integrated transporting discharging A4 is filtered through resistance R14 and the signal
The input terminal of wave unit connects.
In the present embodiment, the signal filter unit includes resistance R15- resistance R28, capacitor C1- capacitor C12 and integrates
Amplifier A5- integrated transporting discharging A6, the connection relationship of above each component are as follows:
The output end of the signal amplification unit is connect with one end of resistance R15, the output end of the signal amplification unit
Also it is connect with one end of capacitor C1, the other end of capacitor C1 is successively connect through capacitor C2, resistance R16 with the other end of resistance R15,
Tie point between resistance R16 and resistance R15 is grounded after capacitor C3, and the tie point between capacitor C2 and resistance R16 is through resistance
It is grounded after R18, the tie point between capacitor C2 and resistance R16 is also connect with the non-inverting input terminal of integrated transporting discharging A5, integrated transporting discharging
The non-inverting input terminal of A5 is also grounded after capacitor C4, and the reverse input end of integrated transporting discharging A5 is grounded after resistance R20, integrated transporting discharging
The reverse input end of A5 is also connect after resistance R19 with the output end of integrated transporting discharging A5, and capacitor C5 is in parallel with resistance R19, is integrated
The output end of amplifier A5 is also connected through the tie point between resistance R17 and capacitor C1 and capacitor C2, the output end of integrated transporting discharging A5
Also successively it is grounded after resistance R21 and capacitor C6.The output end of the integrated transporting discharging A5 is connect with one end of resistance R22, described
The output end of integrated transporting discharging A5 is also connect with one end of capacitor C7, and the other end of capacitor C7 is successively through capacitor C8, resistance R23 and electricity
The other end connection of R22 is hindered, the tie point between resistance R23 and resistance R22 is grounded after capacitor C9, capacitor C8 and resistance R23
Between tie point be grounded after resistance R25, the tie point between capacitor C8 and resistance R23 is also same mutually defeated with integrated transporting discharging A6
Enter end connection, the non-inverting input terminal of integrated transporting discharging A6 is also grounded after capacitor C10, and the reverse input end of integrated transporting discharging A6 is through resistance
It is grounded after R27, the reverse input end of integrated transporting discharging A6 is also connect after resistance R26 with the output end of integrated transporting discharging A6, capacitor C11
In parallel with resistance R26, tie point of the output end of integrated transporting discharging A6 also after resistance R24 between capacitor C7 and capacitor C8 connects
It connects, the output end of integrated transporting discharging A6 is also successively grounded after resistance R28, capacitor C12.The output end of the integrated transporting discharging A6 also with
The connection of second A/D converter circuit 8, by treated, voltage signal V1 passes through the second AD conversion electricity to the signal filter unit
Road is transmitted to the central processing unit 1.
In the present embodiment, the noise of signal processing circuit 9 drifts about within 40nV as 0.1 μ V/ DEG C, integrated transporting discharging A1, collection
It is LT1028 low drifting amplifier at amplifier A2, integrated transporting discharging A3 and integrated transporting discharging A4, integrated transporting discharging A5 and A6 are
LT1495 amplifier, due to integrated transporting discharging A1, integrated transporting discharging A2, integrated transporting discharging A3 and integrated transporting discharging A4 direct current offset and drift simultaneously
It will not influence the overall offset of circuit, so that circuit has extremely low offset and drift.
In the present embodiment, signal amplification unit includes low noise, the low drifting amplifier of 4 LT1028, working principle
It is that noise declines 2 times by 4 devices in parallel, wherein the gain of signal amplification unit is 800, output noise is 2 ×
200 × 1.1nv/Hz, input noise are (1.1/2) nv/Hz.
In the present embodiment, according to testing requirement, the low noise of N number of LT1028, low drift can be set in signal amplification unit
Shift amplifier, noise decline the half power times of N by 4 devices in parallel.
In the present embodiment, signal filter unit is low-pass filter, and for zero point in 50Hz and 60Hz, the trap at zero point is deep
Degree is greater than 40dB's close to 60dB, and in the stopband attenuation at 1kHz.
In the present embodiment, in the signal processing circuit 9, the resistance value of resistance R1 is 7.5 Ω, and the resistance value of resistance R2 is 470
The resistance value of Ω, resistance R3 are 1.5K Ω, and resistance R4 is that resistance value is 7.5 Ω, and the resistance value of resistance R5 is 470 Ω, and the resistance value of R6 is
The resistance value of 1.5K Ω, resistance R7 are 7.5 Ω, and the resistance value of resistance R8 is 470 Ω, and the resistance value of resistance R9 is 1.5K Ω, resistance R10's
Resistance value is 500 Ω, and the resistance value of resistance R11 is 4.7K Ω, and the resistance value of resistance R12 is 1K Ω, and the resistance value of resistance R13 is 9K Ω, electricity
The resistance value for hindering R14 is 5.1K Ω, and the resistance value of resistance R15 is 215K Ω, and the resistance value of resistance R16 is 215K Ω, the resistance value of resistance R17
For 100K Ω, the resistance value of resistance R18 is 215K Ω, and the resistance value of resistance R19 is 200K Ω, and the resistance value of resistance R20 is 100K Ω, electricity
The resistance value for hindering R21 is 10K Ω, and the resistance value of resistance R22 is 169K Ω, and the resistance value of resistance R23 is 169K Ω, the resistance value of resistance R24
For 80.6K Ω, the resistance value of resistance R25 is 169K Ω, and the resistance value of resistance R26 is 200K Ω, and the resistance value of resistance R27 is 100K Ω,
The resistance value of resistance R28 is 10K Ω, and the capacitance of C1 is 15nF, and the capacitance of capacitor C2 is 15nF, and the capacitance of capacitor C3 is
The capacitance of 30nF, capacitor C4 are 100nF, and the capacitance of capacitor C5 is 10nF, and the capacitance of capacitor C6 is 100nF, capacitor C7
Capacitance be 15nF, the capacitance of capacitor C8 is 15nF, and the capacitance of capacitor C9 is 30nF, and the capacitance of capacitor C10 is
The capacitance of 100nF, capacitor C11 are 10nF, and the capacitance of capacitor C12 is 100nF.
In the present embodiment, since the signal that pressure sensor 10 acquires is faint voltage signal, thus signal amplification is single
Member amplifies processing by the voltage V0 that integrated transporting discharging A1-A4 and resistance R1-R14 exports pressure sensor 10, by integrating
The signal amplification unit that amplifier A1-A4 and resistance R1-R14 are constituted only has offset within the drift of 0.1 μ V/ DEG C, 2 μ V, 100pA
The noise of 40nV in bias current and the broadband 0.1Hz to 10Hz.Wherein, signal filter unit uses resistance R15-R28, capacitor
C1-C12 and integrated transporting discharging A5-A6 carries out low-pass filtering treatment to by amplified voltage signal, to improve pressure
The precision of detection.
In the present embodiment, the intelligent monitor system of automobile transmission lubrication oil further includes an ECP Extended Capabilities Port 6, the extension end
Mouth 6 is connect with central processing unit 1, for adding monitoring sensor according to user demand.
In the present embodiment, humidity sensor 2 uses capacitive relative humidity sensor, the sense Wet portion of humidity sensor 2
Use thin polymer film.
Claims (9)
1. a kind of intelligent monitor system of automobile transmission lubrication oil, it is characterised in that: including central processing unit (1), humidity
Sensor (2), temperature sensor (3), the first A/D converter circuit (4), memory (5), display device (7), the second AD conversion electricity
Road (8), signal processing circuit (9) and pressure sensor (10)；
The temperature sensor (3) is used to detect the temperature signal of speed changer internal lubrication oil, and through the first A/D converter circuit (4)
Central processing unit (1) is sent to after processing；The humidity sensor (2) is used to detect the humidity letter of speed changer internal lubrication oil
Number, and central processing unit (1) is sent to after the first A/D converter circuit (4) processing；The temperature sensor (3) and humidity pass
Sensor (2) is connect with the first A/D converter circuit (4) respectively, and the first A/D converter circuit (4) and the central processing unit (1) are even
It connects；
The pressure sensor (10) is used to detect the pressure signal of speed changer internal lubrication oil, and through signal processing circuit (9)
It is sent to central processing unit (1) with after the second A/D converter circuit (8) processing, the pressure sensor (10) and signal processing circuit
(9) it connects, signal processing circuit (9) is connect with the second A/D converter circuit (8), and the second A/D converter circuit (8) and central processing fill
Set (1) connection；
The central processing unit (1) is used to for the temperature signal, moisture signal and pressure signal that receive being transmitted to described
Display device (7) is shown, and the temperature signal received, moisture signal and pressure signal are transmitted to the storage
Device (5) is stored；The central processing unit (1) is connect with display device (7) and memory (5) respectively.
2. the intelligent monitor system of automobile transmission lubrication oil according to claim 1, it is characterised in that: at the signal
Reason circuit (9) includes signal amplification unit and signal filter unit, and the output end and signal of the pressure sensor (10) amplify
The input terminal of unit connects, and the output end of signal amplification unit is connect with the input terminal of signal filter unit, signal filter unit
Output end connect with the second A/D converter circuit (8)；The signal processing circuit (9) successively carries out the pressure signal received
Second A/D converter circuit (8) is transmitted to after signal amplification and signal filtering processing.
3. the intelligent monitor system of automobile transmission lubrication oil according to claim 2, it is characterised in that: the signal is put
Big unit includes integrated transporting discharging A1- integrated transporting discharging A4 and resistance R1- resistance R14；
Wherein, the output end of the pressure sensor (10) respectively with the non-inverting input terminal of integrated transporting discharging A3, integrated transporting discharging A2
Non-inverting input terminal, the connection of the non-inverting input terminal of integrated transporting discharging A1；
The inverting input terminal of the integrated transporting discharging A1 is grounded after resistance R1, the inverting input terminal of integrated transporting discharging A1 and resistance R1 it
Between tie point connect through resistance R2 with the output end of integrated transporting discharging A1, the output end of integrated transporting discharging A1 also successively through resistance R3,
It is grounded after resistance R11, resistance R13 and resistance R12, the output of the tie point between resistance R11 and resistance R13 and integrated transporting discharging A4
End connection；
The inverting input terminal of the integrated transporting discharging A2 is grounded after resistance R4, the inverting input terminal of integrated transporting discharging A2 and resistance R4 it
Between tie point connect through resistance R5 with the output end of integrated transporting discharging A2, the output end of integrated transporting discharging A2 also successively through resistance R6,
It is connect after resistance R10 with the non-inverting input terminal of integrated transporting discharging A4, the tie point between resistance R6 and resistance R10 and resistance R3 and electricity
Hinder the tie point connection between R11；
The inverting input terminal of the integrated transporting discharging A3 is grounded after resistance R7, the inverting input terminal of integrated transporting discharging A3 and resistance R7 it
Between tie point connect through resistance R8 with the output end of integrated transporting discharging A3, the output end of integrated transporting discharging A3 is also through resistance R9 and resistance
Tie point connection between R6 and resistance R10；
The reverse input end of the integrated transporting discharging A4 is grounded, and the output end of integrated transporting discharging A4 is filtered through resistance R14 and the signal
The input terminal of unit connects.
4. the intelligent monitor system of automobile transmission lubrication oil according to claim 2 or 3, which is characterized in that the letter
Number filter unit includes resistance R15- resistance R28, capacitor C1- capacitor C12 and integrated transporting discharging A5- integrated transporting discharging A6；
Wherein, the output end of the signal amplification unit is connect with one end of resistance R15, the output end of the signal amplification unit
Also it is connect with one end of capacitor C1, the other end of capacitor C1 is successively connect through capacitor C2, resistance R16 with the other end of resistance R15,
Tie point between resistance R16 and resistance R15 is grounded after capacitor C3, and the tie point between capacitor C2 and resistance R16 is through resistance
It is grounded after R18, the tie point between capacitor C2 and resistance R16 is also connect with the non-inverting input terminal of integrated transporting discharging A5, integrated transporting discharging
The non-inverting input terminal of A5 is also grounded after capacitor C4, and the reverse input end of integrated transporting discharging A5 is grounded after resistance R20, integrated transporting discharging
The reverse input end of A5 is also connect after resistance R19 with the output end of integrated transporting discharging A5, and capacitor C5 is in parallel with resistance R19, is integrated
The output end of amplifier A5 is also connected through the tie point between resistance R17 and capacitor C1 and capacitor C2, the output end of integrated transporting discharging A5
Also successively it is grounded after resistance R21 and capacitor C6；
The output end of the integrated transporting discharging A5 is connect with one end of resistance R22, the output end of the integrated transporting discharging A5 also with capacitor
One end of C7 connects, and the other end of capacitor C7 is successively connect through capacitor C8, resistance R23 with the other end of resistance R22, resistance R23
Tie point between resistance R22 is grounded after capacitor C9, and the tie point between capacitor C8 and resistance R23 is followed by through resistance R25
Ground, the tie point between capacitor C8 and resistance R23 are also connect with the non-inverting input terminal of integrated transporting discharging A6, the same phase of integrated transporting discharging A6
Input terminal is also grounded after capacitor C10, and the reverse input end of integrated transporting discharging A6 is grounded after resistance R27, and integrated transporting discharging A6's is anti-
It is also connect after resistance R26 with the output end of integrated transporting discharging A6 to input terminal, capacitor C11 is in parallel with resistance R26, integrated transporting discharging A6
Tie point of the output end also after resistance R24 between capacitor C7 and capacitor C8 connect, the output end of integrated transporting discharging A6 also according to
It is secondary to be grounded after resistance R28, capacitor C12；
The output end of the integrated transporting discharging A6 is also connect with the second A/D converter circuit (8), after the signal filter unit will be handled
Voltage signal V1 the central processing unit (1) is transmitted to by second A/D converter circuit (8).
5. the intelligent monitor system of automobile transmission lubrication oil according to claim 4, it is characterised in that: the temperature passes
Sensor (3) uses platinum resistance temperature sensor, is monitored by the variation of platinum resistance resistance value to temperature, the central processing dress
Set the temperature change that (1) analyzes the temperature signal received the speed changer internal lubrication oil, wherein pass through following formula pair
Temperature is calculated:
R=R (0 DEG C)+At+Bt (t-100 DEG C)+Ct2(t-100℃)+Dt3(t-100℃)+Et4(t-100℃)；
Wherein, R is the real-time resistance value of platinum resistance, and (0 DEG C) of R is resistance value of the platinum resistance at 0 DEG C, and t is temperature value to be measured, A=
4.18 × 0.001, B=-9.41 × 0.00000001, C=1.33 × 0.000000001, D=-3.92 × 0.0000000001,
E=8.72 × 0.00000000001.
6. the intelligent monitor system of the oil of automobile transmission lubrication described according to claim 1 or 2 or 3 or 5, it is characterised in that:
The moisture signal of humidity sensor (2) acquisition is x (n), and n is positive integer, and the central processing unit (1) is to what is received
Moisture signal carries out drift compensation to humidity by following formula:
Y (n)=x (n) * h (n)；
Wherein, h (n) is drift penalty function, and δ is drift regulating constant, and compensation effect is adjusted by δ, and y (n) is to pass through
The compensated moisture signal of drift.
7. the intelligent monitor system of automobile transmission lubrication oil according to claim 6, it is characterised in that: further include difference
The clock circuit (12) and E2PROM (11) being connect with central processing unit (1).
8. the intelligent monitor system of the oil of automobile transmission lubrication described according to claim 1 or 2 or 3 or 5 or 7, feature exist
In: it further include the ECP Extended Capabilities Port (6) being connect with central processing unit (1).
9. the intelligent monitor system of automobile transmission lubrication oil according to claim 8, it is characterised in that: the humidity passes
Sensor (2) uses capacitive relative humidity sensor.
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| CN201910309144.8A CN110017367A (en) | 2019-04-17 | 2019-04-17 | The intelligent monitor system of automobile transmission lubrication oil |
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| CN201910309144.8A CN110017367A (en) | 2019-04-17 | 2019-04-17 | The intelligent monitor system of automobile transmission lubrication oil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116733953A (en) * | 2023-08-14 | 2023-09-12 | 泰兴市康森爱特传动设备科技有限公司 | Planetary reducer for multi-drive vehicle gearbox |
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Application publication date: 20190716 |