CN105698859B - Multi-parameter sensor for train EEF bogie status monitoring - Google Patents
Multi-parameter sensor for train EEF bogie status monitoring Download PDFInfo
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- CN105698859B CN105698859B CN201610092948.3A CN201610092948A CN105698859B CN 105698859 B CN105698859 B CN 105698859B CN 201610092948 A CN201610092948 A CN 201610092948A CN 105698859 B CN105698859 B CN 105698859B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Abstract
The invention discloses a kind of multi-parameter sensor for train EEF bogie status monitoring, including shell 1, pedestal 2, pigtail splice 3, charge amplifier 4, mass 5, vibratory impulse Sensitive Apparatus 6, current-limiting resistance 7, temperature sensor 8, temperature-sensitive logic element 9, mounting 10, the vibration of energy Centralizing inspection train EEF bogie critical component, impact, temperature, four kinds of parameters of temperature-sensitive logic state, the strong electromagnetic in train EEF bogie status monitoring can effectively be suppressed, overcome the problem of commonly using Single-end output sensor poor anti jamming capability in existing train EEF bogie status monitoring, avoid in existing train EEF bogie status monitoring often because sensing element fails and caused by mistaken diagnosis or fail to pinpoint a disease in diagnosis, meet the application requirement of train EEF bogie monitoring running state and fault diagnosis.
Description
Technical field
It is particularly a kind of to use the present invention relates to a kind of sensor special for train operation state monitoring and fault diagnosis
In the multi-parameter sensor of train EEF bogie status monitoring.
Background technology
Train EEF bogie operation monitoring safety status is the important component of railway operation safety guarantee information system, it
Real-time monitoring to train operation state in operation is realized by onboard sensor, monitoring device etc., operation can be found in time
State bad vehicle or parts, firsthand data data is provided for rolling stock inspection and repair, to ensure railway operation safety and
The required level of service for improving rolling stock is significant.Sensor technology, as one of three big bases of information technology, is to work as
The high-tech that Qian Ge developed countries competitively develop.Sensor be similar to the mankind in order to obtain external information must by sensation
Organ, is a kind of detection means, can experience measured information, and can will detect the information experienced, and is become according to certain rules
Change into as electric signal or form needed for other information output, to meet the transmission of information, processing, storage, display, record and control
System etc. is required, is the primary link realized automatic detection He automatically controlled.In general a sensor can only measure a thing
Reason amount, in order to be able to accurate comprehensively object of cognition and environment, to be further monitored or control, generally requires multiple sensors
To measure multiple physical quantitys simultaneously so that system architecture is huge and complicated, reduces its reliability and stability.
Train EEF bogie be chronically at a high speed, the working condition of heavy duty, it is prolonged and repeated due to its working face contact stress
Effect, easily causes the failures such as bearing fatigue, crackle and impression, causes bearing heating, axle fracture, volume is brought to rolling stock
Outer impact shock, then produces " hot axle " or other failures；Therefore, status monitoring and event must be carried out to train EEF bogie
Barrier diagnosis.Because train operation operating mode is complicated, EEF bogie working environment is severe, disturbing factor is various, is often vulnerable to impact, friction
Deng external action, this be train EEF bogie status monitoring sensor design and fabrication in insoluble problem.In train fortune
In row status monitoring, each section car body EEF bogie is required for being monitored, if number of sensors is excessive, can cause monitoring system
Complicated, information gathering is scattered, signals transmission is easily disturbed, and this is just examined to the status monitoring and failure of train EEF bogie
It is disconnected to bring certain difficulty.
Existing train EEF bogie state monitoring method mainly has：Temperature monitoring, vibratory impulse monitoring, temperature with it is vibration integrated
Monitor three kinds of methods.Being raised based on temperature is after some parts of EEF bogie break down and closes on a kind of external spy for causing accident
Performance is levied, China's passenger train mostly employs train axle temperature monitoring alarm；But not all failure is all necessarily led
Cause temperature rise（Such as gear distress, tread failure and partial bearing working surface damage）, therefore, for the traveling of railway locomotive
Portion is generally using temperature and the method for vibration integrated monitoring.Practice have shown that, single bearing temperature monitoring alarm is incomplete, is also
Incomplete, although monitoring effect is improved by temperature and the method for vibration integrated monitoring, but also have one
A little problems：The Single-end output mode of vibratory impulse monitoring sensor can cause mistaken diagnosis to miss because of EEF bogie intense electromagnetic interference effect
Sentence, at the same it is unavoidable because sensing element fail and caused by mistaken diagnosis or fail to pinpoint a disease in diagnosis.For this reason it would be desirable to as far as possible several sensitive first devices
Part makes together, enables a multi-parameter sensor while measuring several parameters, with a variety of functions, is not only easy to train to walk
The I＆M of row portion condition monitoring device, while also improving the stability and reliability of monitoring system.
Multi-parameter sensor is being met on the function basis of each parameter monitoring, is optimized monitoring system structure, is improved
The stability and reliability of system；Reduce to a certain extent the installation cost of train EEF bogie monitoring system, human resources,
Financial resource, a large amount of and comprehensive Monitoring Data can be provided for monitoring system, makes the fault diagnosis of train EEF bogie more accurate
It is really reliable, to ensureing that train operating safety is significant.Therefore, develop a kind of for many of train EEF bogie status monitoring
Parametrical sense device is very necessary.
The content of the invention
In view of the above-mentioned problems of the prior art, being used for train operation state prison it is an object of the invention to provide one kind
Survey the sensor special with fault diagnosis, particularly a kind of multi-parameter sensor for train EEF bogie status monitoring.
To achieve the above object, a kind of multi-parameter sensor for train EEF bogie status monitoring of the invention, including
Shell（1）, pedestal（2）, pigtail splice（3）, charge amplifier（4）, mass（5）, vibratory impulse Sensitive Apparatus（6）, current limliting
Resistance（7）, temperature sensor（8）, temperature-sensitive logic element（9）, mounting（10）；It is characterized in that the sensor passes through pedestal
（2）Lower thread is reliably connected and by pigtail splice with EEF bogie critical component（3）There is provided working power VCC, GND and extraction
Va+, Va-, DQ, Kon signal wire, mass is passed through by screw（5）It is fastened on pedestal（2）Vibratory impulse in upper grooves is sensitive
Device（6）The vibratory impulse produced in the operation of train EEF bogie is picked up in a differential manner and is fixed on pedestal via screw（2）Top
The charge amplifier in portion（4）Difference output Va+ and Va- is connected to pigtail splice after amplification（3）, temperature sensor（8）, temperature-sensitive
Logic element（9）With current-limiting resistance（7）It is packaged in sensor base（2）Bottom by mounting（10）It is in sealed perforate and digital
Temperature signal DQ, temperature-sensitive logical signal Kon signal wire lead to pigtail splice by a side opening connected with bottom opening
（3）, sensitive components and circuit are installed in the shell of threaded connection（1）And pedestal（2）, be fixed on shell（1）On lead
Joint（3）, pedestal（2）The metal mounting of bottom（10）, can Centralizing inspection train traveling in the closed metal cavity formed together
The vibration in portion, impact, temperature, four kinds of parameters of temperature-sensitive logic state.
Described vibratory impulse Sensitive Apparatus（6）It is in series by two panels identical piezoelectric chip, to form a difference
The signal source of the way of output.
Described charge amplifier（4）Be an input and output be differential mode single supply fully-differential amplifier, bag
Include resistance R1, R2, R3 and low-power consumption low noise double operational IC1 composition fully-differential amplifier there is provided vibratory impulse Sensitive Apparatus
DM EMI on divider resistance R4, R5 of working power, vibratory impulse Sensitive Apparatus lead suppresses resistance R6, power supply decoupling electricity
Hold C1, C2.
Described temperature sensor（8）For 1-wire digital temperature sensor, temperature-sensitive logic element（9）For easily fusion
Gold, temperature sensor（8）Monobus digital temperature signal DQ be attached directly to pigtail splice（3）, temperature-sensitive logic element（9）With
Current-limiting resistance（7）Temperature sensor is connected to after series connection（8）Both ends of power, temperature-sensitive logical signal Kon by concatenation point output
And it is connected to pigtail splice（3）, and it is effectively, defeated to be output as the vibratory impulse of the sensor pickup, temperature signal during high level
Vibratory impulse, the temperature signal for going out sensor pickup during for low level are invalid.
The beneficial effects of the invention are as follows the difference output vibratory impulse sensitive signal being made up of two panels identical piezoelectric chip
Source, is connected to the single supply fully differential electric charge being made up of double operational IC1, resistance R1, R2, R3, R4, R5, R6 and electric capacity C1, C2 and puts
Big device, can effectively suppress dry to the common mode disturbances and differential mode of charge amplifier lead and sensor output lead from piezoelectric chip
Disturb, solve the overall Single-end output side of the vibratory impulse Sensitive Apparatus or sensor commonly used in existing train EEF bogie status monitoring
The problem of poor anti jamming capability that formula is brought；The sensitive components and circuit of sensor are installed in by PROCESS FOR TREATMENT outer
In the closed metal cavity that shell, pedestal, mounting are formed together, the strong electromagnetic effectively suppressed in train EEF bogie status monitoring is done
Disturb；The sensitive components of inventive sensor includes vibratory impulse Sensitive Apparatus, temperature sensor, temperature-sensitive logic element（Its
Threshold temperature presses the minimum invalid temperature choosing in vibratory impulse Sensitive Apparatus and circuit, temperature sensor, measurand etc.
It is fixed）, can the vibration of Centralizing inspection train EEF bogie, impact, temperature, four kinds of parameters of temperature-sensitive logic state, in temperature-sensitive logic state
The output signal of vibratory impulse Sensitive Apparatus and temperature sensor effectively, is output as low in temperature-sensitive logic state during for high level
The output valve of vibratory impulse Sensitive Apparatus and temperature sensor is not considered during level and directly alarm, it is to avoid existing train is walked
In row portion status monitoring often because sensing element fail and caused by mistaken diagnosis or omitting diagnosis.
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Brief description of the drawings
Fig. 1 is the section of structure of the present invention.
In figure：1. shell, 2. pedestals, 3. pigtail splices, 4. charge amplifiers, 5. masses, 6. vibratory impulse sensors
Part, 7. current-limiting resistances, 8. temperature sensors, 9. temperature-sensitive logic elements, 10. mountings.
Fig. 2 is the theory diagram of the present invention.
Fig. 3 is the piezo-electric effect schematic diagram of the present invention.
In figure：A. insulation diaphragm, B. piezoelectric chips, C. copper plate electrodes.
Fig. 4 is the circuit theory diagrams of the present invention.
In figure：3. pigtail splice, 6. vibratory impulse Sensitive Apparatuses, 7. current-limiting resistances, 8. temperature sensors, 9. temperature-sensitives are patrolled
Collect element.
Fig. 5 is the upward view of the present invention.
Fig. 6 is the top view of the present invention.
Fig. 7 is the base thread joint figure of the present invention.
Fig. 8 is the outline drawing of the present invention.
Embodiment
With reference to accompanying drawing, Fig. 1 is profile of the present invention, and Fig. 2 is principle of the invention block diagram.One kind is used for train EEF bogie state
The multi-parameter sensor of monitoring, including shell, pedestal, pigtail splice, charge amplifier, mass, vibratory impulse Sensitive Apparatus,
Current-limiting resistance, temperature sensor, temperature-sensitive logic element, mounting；Sensor internal is quick equipped with vibratory impulse Sensitive Apparatus, temperature
Inductor component, three kinds of sensitive components of temperature-sensitive logic element, wherein, vibratory impulse Sensitive Apparatus is used to pick up train EEF bogie key
Vibration and impact produced by part running, temperature sensor were run for monitoring train EEF bogie critical component
Temperature variations in journey, temperature-sensitive logic element in the conduction state, temperature when temperature is not less than its threshold values exceedes its valve
It is off after value（Its threshold values is pressed in vibratory impulse Sensitive Apparatus and circuit, temperature sensor, measurand etc. most
Low invalid temperature is selected）, for the real-time output alarm signal when train EEF bogie critical component running temperature exceedes its threshold values.
The vibratory impulse Sensitive Apparatus of inventive sensor is fastened in pedestal upper grooves by screw by mass, with
Its charge amplifier connected is fixed at the top of pedestal by screw.The vibratory impulse Sensitive Apparatus is by two panels identical piezoelectric chip
It is in series（Referring to Fig. 3, A is that insulation diaphragm, B are that piezoelectric chip, C are copper plate electrode）, to form a difference output mode
Signal source, its operation principle be measured using the piezo-electric effect of piezoelectric crystal plate train EEF bogie critical component vibration and
Impact.The material of piezo-electric crystal is a kind of ionic crystal dielectric, not only under electric field force effect, and in mechanical force
Under, it can all produce polarization phenomena；I.e.：When applying mechanical force on these dielectric certain orientations and being deformed, Jiu Huiyin
The polarization that its internal positive and negative charge center produces electricity with respect to transfer is played, so as to cause two apparent surface（Plane of polarization）On go out
Show the opposite bound charge of symbol, and its dielectric displacement is directly proportional to external carbuncle tensor；When external force disappears, recover not charged original again
Shape；When external force deflecting, charge polarity becomes therewith.This phenomenon is referred to as direct piezoelectric effect, or abbreviation piezo-electric effect.The present invention is passed
The vibratory impulse Sensitive Apparatus of sensor belongs to piezoelectric acceleration transducer, using centre mounted compression constitution form, quality when vibrated
Block adds power on the piezoelectric element also to change therewith, when tested vibration frequency is far below the intrinsic frequency of sensor, then power
Change is directly proportional to by measuring acceleration；Its principle is directly proportional using the electric charge output of piezo-electric crystal to suffered power, and suffered
Power is directly proportional in the case where sensitive-mass is certain to acceleration magnitude, i.e., under certain condition, is produced after piezo-electric crystal stress
The quantity of electric charge is directly proportional to the acceleration magnitude experienced.The key technical indexes of inventive sensor is：Maximum impact acceleration
10000g, highest frequency response frequency 16kHz, fully meets the requirement of train EEF bogie status monitoring.The vibration of inventive sensor
Shock-sensitive device is difference output mode, and its electric charge exported is just suffered outer as being proportional to after fully differential charge amplifier
The electricity output of power, because the interference signal of train EEF bogie is usually to exist in the form of common-mode signal, the output side
Formula effectively suppression common mode can be disturbed, and drastically increase the signal to noise ratio of sensor.
The temperature sensor of inventive sensor is encapsulated in the perforate of sensor base bottom and in temperature-sensitive logic basis
On part, signal wire and power line are drawn by the side opening of pedestal middle and upper part, and the temperature sensor of sensor is monobus numeral
Temperature sensor, optional device has DS18B20, DS1820, DS1822 etc., is introduced as follows by taking DS18B20 as an example.DS18B20 is
The 1-wire digital temperature sensor of DALLAS companies of U.S. production, can be directly changed into temperature signal serial digital signal confession
CPU processing, can mount multiple DS18B20 chips in a bus, be only one of which bus line command person and it is one or more from
The computer application system of person's composition；Main frame or slave are connected to the monobus by an open-drain or tri-state port, to permit
Perhaps equipment can discharge bus when not sending data, and allow other equipment to use bus；DS18B20 digital temperature sensors can
9~12 temperature readings are provided, reads or write-in DS18B20 information only needs a bus, bus can be hung to all in itself
The DS18B20 chips connect provide power supply, without extra power supply；Due to this feature of DS18B20, it is very suitable for train and walks
The achieving multipoint temperature detection system of row portion critical component, hardware configuration is simple, convenient networking.Using monobus special technology, both may be used
, also can be by other I/O mouth lines and cpu i/f by serial mouth line, without other translation circuits, directly output is by thermometric
Spend digital quantity (9~12 bits, containing 1 bit sign position, can by programming determine specific digit), temperature-measuring range for -55 DEG C~+
125 DEG C, Measurement Resolution is 0.5 DEG C, reaches as high as 0.0625 DEG C, power supply voltage is 3.0~5.5V.Train EEF bogie is closed
The monitoring temperature of key member directly being digitally transmitted with monobus, substantially increases the interference free performance of monitoring system.
The temperature-sensitive logic element of inventive sensor is encapsulated in the perforate of sensor base bottom and in temperature sensing device
Under part, signal wire and power line are drawn by the side opening of pedestal middle and upper part.The temperature-sensitive logic element of inventive sensor is meltable
Alloy, is connected to the both ends of power of temperature sensor, logical signal is by concatenation point output after being connected with current-limiting resistance.Easily fusion
Gold, also referred to as low-melting alloy, mould alloy are the alloys being made of elements such as bismuth, lead, tin and cadmiums.Fusible alloy is often by widely
Automatically controlled for electric, as temperature-sensitives such as the fuse in the devices such as electrical equipment, steam, fire-fighting, fire alarm, fuses
Component, is the quite potential low-melting alloy new material of a class.Common fusible alloy includes：47 DEG C of fusible alloys, 58
DEG C fusible alloy, 70 DEG C of fusible alloys, 92 DEG C of fusible alloys, 100 DEG C of fusible alloys, 105 DEG C of fusible alloys, 120 DEG C of easily fusions
Gold, 125 DEG C of fusible alloys, 138 DEG C of fusible alloys, 145 DEG C of fusible alloys, 150 DEG C of fusible alloys, 160 DEG C of fusible alloys, 170
DEG C fusible alloy, 182 DEG C of fusible alloys, 190 DEG C of fusible alloys, 200 DEG C of fusible alloys etc..It is characterized in：Fusing point is accurate, fusing model
Enclose narrower, be quick on the draw, completed up to temperature action, fusing time in 60~120 seconds, Thermal Cutoffs melts turn-off time 20
In~60 seconds.Pressed in inventive sensor in vibratory impulse Sensitive Apparatus and circuit, temperature sensor, measurand etc. most
Low invalid temperature selects to be used as the melting temperature of the fusible alloy of temperature-sensitive logic element（Or threshold temperature）, the threshold temperature should
Meet the relevant standard requirement of China railways rolling stock；Fusible alloy is in when in monitoring point, temperature is not less than its threshold temperature
Conducting state, temperature-sensitive logic element is output as high level, now, and vibratory impulse, the temperature signal of sensor pickup are effective, prison
Vibratory impulse that examining system is picked up according to sensor, temperature signal judge the running status of train EEF bogie critical component；Work as prison
Measuring point temperature exceedes fusible alloy after its threshold temperature and melted（It is off）, temperature-sensitive logic element is output as low electricity
Flat, now, vibratory impulse, the temperature signal of sensor pickup are invalid, and monitoring system CPU is responded in the low level of measuring point output
It is disconnected, measuring point failure is determined in time and sends alarm signal；So, monitoring system both can be according to effective vibratory impulse, temperature
Signal makes correct judgement to the running status of train EEF bogie critical component, also can be in vibratory impulse Sensitive Apparatus, temperature
Alarm signal is provided in time when Sensitive Apparatus fails or measuring point temperature exceedes its threshold temperature；Overcome existing train EEF bogie
In status monitoring because Sensitive Apparatus fail and caused by mistaken diagnosis or fail to pinpoint a disease in diagnosis.
Referring to Fig. 4, described charge amplifier be one by low-power consumption low noise double operational IC1, resistance R1, R2, R3,
R4, R5, R6 and electric capacity C1, C2 composition single supply fully-differential amplifier, it is inputted, output is differential mode, can effectively be pressed down
Common mode disturbances in system input, output lead.IC1 is low-power consumption low noise double operational, and optional model has：AD8572、AD8599、
OP285, OP297, LI1012 etc.；Electric capacity C1, C2 are power supply decoupling capacitance, the preferable COG electricity of selection high-frequency noise rejection
Hold；Resistance R4, R5 are used for from power supply partial pressure to provide working power to vibratory impulse Sensitive Apparatus, and resistance R6 is used to suppress to vibrate
DM EMI on shock-sensitive device wire, the fully-differential amplifier that resistance R1~R3 and double operational IC1 is constituted, wherein R3 is used
In regulation fully-differential amplifier multiplication factor to adapt to the vibratory impulse Sensitive Apparatus that sensitivity is different, difference amplifier is put
Big multiple is：A=1+(R1+R2)/R3.In sensor tuning process, R3 is substituted by variable resistance, by R3 after the completion of adjusting
It is changed to the fixed resistance of respective resistance values.Resistance R1~R6 selects the preferable metalfilmresistor of temperature characterisitic.
As shown in Figure 4, the pigtail splice of inventive sensor is 6 cores, is respectively defined as：The logic of temperature-sensitive logic element is defeated
Go out Kon, the data signal input of 1-wire digital temperature sensor and output DQ, probe power VCC, sensor ground GND, difference
Divide the vibration and shock signal Va+ and Va- of output.The working power of sensor can be selected between 3.0~5.5V, specific Ying Man
Sufficient double operational IC1 and temperature sensor working power select the working sensor power supply of lower grade as far as possible on the premise of requiring
Voltage, to reduce the quiescent dissipation of sensor；Meanwhile, resistance R4, R5 resistance should be greater than 10K Ω, and resistance R1, R2 resistance should
It is fusible alloy more than 100K Ω, the resistance for the current-limiting resistance connected with temperature-sensitive logic element should be in more than 500K Ω.
Referring to Fig. 5, Fig. 6, Fig. 7, Fig. 8, be respectively the upward view of inventive sensor, top view, base thread joint figure,
And outline drawing, it is a hexagon in the middle part of a kind of detachable bolt connection, pedestal that the installation connection of inventive sensor, which is,
Nut, including cap body, the body of rod that is downwardly extending from the cap body, the body of rod include being formed in the body of rod
Sealing hole and formed in the outer rim of the body of rod and with the rotation direction identical external screw thread of the shell, the body of rod it is straight
Footpath is less than the diameter of cap body；In practical application, the body of rod is buried in the measured workpiece of train EEF bogie, and the bolt with
Threaded connection is formed between workpiece, so as to strengthen the connection between sensor and measured workpiece, prevents from loosening.Present invention sensing
The sensitive components and circuit of device are installed in the closed metal cavity that shell, pedestal, mounting are formed together, working power and
Transducing signal is all connected to pigtail splice, can effectively suppress the strong electromagnetic of train EEF bogie status monitoring work condition environment, make
Train EEF bogie monitoring running state result is more accurately and reliably.
Claims (4)
1. a kind of multi-parameter sensor for train EEF bogie status monitoring, including shell（1）, pedestal（2）, pigtail splice
（3）, charge amplifier（4）, mass（5）, vibratory impulse Sensitive Apparatus（6）, current-limiting resistance（7）, temperature sensor（8）、
Temperature-sensitive logic element（9）, mounting（10）；It is characterized in that the sensor passes through pedestal（2）Lower thread is crucial with EEF bogie
Part is reliably connected and by pigtail splice（3）There is provided working power VCC, GND and draw Va+, Va-, DQ, Kon signal wire, by
Screw passes through mass（5）It is fastened on pedestal（2）Vibratory impulse Sensitive Apparatus in upper grooves（6）Pickup is arranged in a differential manner
The vibratory impulse that produces and pedestal is fixed in the operation of car EEF bogie via screw（2）The charge amplifier at top（4）After amplification
Difference output Va+ and Va- is connected to pigtail splice（3）, temperature sensor（8）, temperature-sensitive logic element（9）With current-limiting resistance
（7）It is packaged in sensor base（2）Bottom by mounting（10）Sealed perforate is interior and digital temperature signal DQ, temperature-sensitive logic are believed
Number Kon signal wire leads to pigtail splice by a side opening connected with bottom opening（3）, sensitive components and circuit are pacified
Mounted in the shell of threaded connection（1）And pedestal（2）, be fixed on shell（1）On pigtail splice（3）, pedestal（2）The metal of bottom
Mounting（10）In the closed metal cavity formed together, can the vibration of Centralizing inspection train EEF bogie, impact, temperature, temperature-sensitive patrol
Collect four kinds of parameters of state.
2. a kind of multi-parameter sensor for train EEF bogie status monitoring according to claim 1, it is characterised in that
Described vibratory impulse Sensitive Apparatus（6）It is in series by two panels identical piezoelectric chip, to form a difference output mode
Signal source.
3. a kind of multi-parameter sensor for train EEF bogie status monitoring according to claim 1, it is characterised in that
Described charge amplifier（4）Be an input and output be differential mode single supply fully-differential amplifier, including resistance R1,
There is provided vibratory impulse Sensitive Apparatus working power for the fully-differential amplifier of R2, R3 and low-power consumption low noise double operational IC1 compositions
DM EMI on divider resistance R4, R5, vibratory impulse Sensitive Apparatus lead suppresses resistance R6, power supply decoupling capacitance C1, C2.
4. a kind of multi-parameter sensor for train EEF bogie status monitoring according to claim 1, it is characterised in that
Described temperature sensor（8）For 1-wire digital temperature sensor, temperature-sensitive logic element（9）For fusible alloy, temperature is quick
Inductor component（8）Monobus digital temperature signal DQ be attached directly to pigtail splice（3）, temperature-sensitive logic element（9）With current-limiting resistance
（7）Temperature sensor is connected to after series connection（8）Both ends of power, temperature-sensitive logical signal Kon by concatenation point export and be connected to
Pigtail splice（3）, and be output as the vibratory impulse of sensor pickup, temperature signal during high level and effectively, be output as low electricity
Usually vibratory impulse, the temperature signal of the sensor pickup are invalid.
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Cited By (1)
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| EP3588012A1 (en) * | 2018-06-21 | 2020-01-01 | Continental Automotive GmbH | Method, device and system for detecting tampering attempt on a sensor of a vehicle and sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107884214B (en) * | 2017-11-08 | 2019-12-03 | 北京唐智科技发展有限公司 | A kind of train EEF bogie unit failure multi-parameter comprehensive decision-making technique and device |
| CN111366688A (en) * | 2020-03-31 | 2020-07-03 | 扬州市奥特瑞汽车电子科技有限公司 | Temperature and humidity sensor and method for detecting automobile gas circuit by adopting temperature and humidity sensor |
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