CN107703330A - The acceleration sensor apparatus steadily comfortably detected for the axle of standard EMUs three - Google Patents
The acceleration sensor apparatus steadily comfortably detected for the axle of standard EMUs three Download PDFInfo
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- CN107703330A CN107703330A CN201711081597.7A CN201711081597A CN107703330A CN 107703330 A CN107703330 A CN 107703330A CN 201711081597 A CN201711081597 A CN 201711081597A CN 107703330 A CN107703330 A CN 107703330A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
- G01P15/125—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by capacitive pick-up
Abstract
The acceleration sensor apparatus for being used for the axle of standard EMUs three and steadily comfortably detecting of the present invention, communicated to connect with monitoring host computer, including three dimension acceleration sensor, signal cable, cable connector, joint and cable sheath tube, the three dimension acceleration sensor is communicated to connect by one end of cable connector and signal cable, the periphery of the signal cable sets the cable sheath tube, and the other end of the signal cable is communicated to connect by joint and monitoring host computer.Beneficial effect：Simple and reliable with modularized circuit and structure design thinking, product is easy to produce in batches.
Description
Technical field
The present invention relates to sensor field, and in particular to a kind of acceleration steadily comfortably detected for the axle of standard EMUs three
Spend sensor device.
Background technology
For the stability of high ferro operation, we can investigate from three indexs.First index is longitudinal stability,
During including train start-stop, acceleration and deceleration when, the stationarity for the when of traveling at the uniform speed；Second index is lateral stability, and key reaction arranges
Car is vacillated now to the left, now to the right；3rd index is vertical stability, mainly reacts pitching for train.
First index, longitudinal stability, it is related to two concepts.First concept is acceleration（Deceleration）, reflection
Be velocity variations speed；Second concept is acceleration（Subtract deceleration）, reaction is acceleration（Deceleration）Change
Speed.Previous unit is meter per second 2, and the latter unit is meter per second 3.
And the index of bullet train longitudinal direction stationarity can be reflected, and it is exactly acceleration or subtracts deceleration, certain train
This value affirmative is smaller when traveling at the uniform speed, can reflect train longitudinal direction stationarity it is horizontal be exactly when train is started to walk or
When stopping.
Second index, lateral stability, lateral stability i.e. double swerve.In this index, Chinese height
Iron Train Control obtains also very strict.Or by taking CRH380A type EMUs as an example, in train with 300 kilometers of operations of speed per hour
When, it is desirable to the horizontal peak acceleration in the middle part of guest room only has 0.42 meter per second 2.
3rd index, vertical stability, vertical stability, that is, pitch.
For longitudinal stationarity of train, play a decisive role, what is stood in the breach is train, but for train laterally with
Vertical stability, what is played a decisive role is high ferro circuit.
The content of the invention
Present invention aims to overcome that the deficiencies in the prior art, there is provided it is steadily comfortable that one kind is used for the axle of standard EMUs three
The acceleration sensor apparatus of detection, is specifically realized by following technical scheme：
The acceleration sensor apparatus steadily comfortably detected for the axle of standard EMUs three, is communicated to connect with monitoring host computer,
Including three dimension acceleration sensor, signal cable, cable connector, joint and cable sheath tube, the three-dimensional acceleration passes
Sensor is communicated to connect by one end of cable connector and signal cable, and the periphery of the signal cable sets the cable cover(ing)
Pipe, the other end of the signal cable are communicated to connect by joint and monitoring host computer.
The further design of the acceleration sensor apparatus steadily comfortably detected for the axle of standard EMUs three is,
The three dimension acceleration sensor includes shell, cap, AB silica gel, semiclosed inner casing and wiring board provided with through hole, described
Inner casing is in the shell, and the wiring board is located in inner casing and communicated to connect with signal cable, and the wiring board is by PCB bottoms
Plate, PCB lateral plate components and PCB top plates composition, PCB Floor waters level land is fixed on shell and PCB bottom plates accelerate provided with Z axis
Chip is spent, PCB lateral plate components are made up of three pieces of pcb boards, the first PCB side plates respectively provided with X-axis acceleration chip, provided with Y
2nd PCB side plates of axle acceleration chip and provided with the 3rd PCB side plates that three road voltage signals are switched to current signal, it is described
First PCB side plates, the 2nd PCB side plates and the 3rd PCB side plates are arranged between PCB bottom plates and PCB top plates and are each perpendicular to PCB
Bottom plate and PCB top plates, the 2nd PCB side plates and the 3rd PCB side plates are set perpendicular to the first PCB side plates, and interior intracavitary pours into the AB
Silica gel.
The further design of the acceleration sensor apparatus steadily comfortably detected for the axle of standard EMUs three is,
The inner casing is isolated pcb board component and shell by nylon stud and bolt and epoxy plate, and the PCB bottom plates pass through black
Epoxy resin is fixed with housing, and X-axis acceleration chip steeps the level of adjustment chip, PCB side plates and PCB bottoms by horizontal columns
Plate adjusts posture with the perpendicular quadrature between ensuring by steel square.
The further design of the acceleration sensor apparatus steadily comfortably detected for the axle of standard EMUs three is,
It is additionally provided with PCB bottom plates：
AD sample conversion circuits, receive the analog signal of 3-axis acceleration chip collection respectively, and are converted into three railway digital signals
Output；
Microprocessor, amendment is made to three railway digital signal in orthogonal vertical properties by inverse matrix algorithm, and according to first-order filtering
Algorithm, compensation is made to frequency response；
Self-test detects circuit, the switching signal that reception processing device is given by relay, self-test detection electricity is controlled according to switching signal
The switching of road internal electron switch simultaneously acts on microprocessor interrupt mouth, final output self-test current signal.
The further design of the acceleration sensor apparatus steadily comfortably detected for the axle of standard EMUs three is,
3rd PCB side plates are provided with DA current sources, the control signal exported according to microprocessor, export the corresponding linear electricity of the data signal
Stream.
The further design of the acceleration sensor apparatus steadily comfortably detected for the axle of standard EMUs three is,
The PCB top plates are provided with power supply and translation circuit, and the power supply and translation circuit include anti-reverse unit, anti-wave
Gush device, low pressure difference linearity regulated converter, fuse current-limiting fuse slowly, the slow fusing current-limiting fuse, antisurge device,
Low pressure difference linearity regulated converter and anti-reverse unit are sequentially connected electrically；The antisurge device includes thermistor, first
Inductance and voltage-regulator diode, the thermistor, the first inductance and voltage-regulator diode mutually connect two-by-two；The low voltage difference
Linear voltage stabilization converter includes the second inductance, electric capacity and the 3rd inductance, and second inductance, electric capacity and the 3rd inductance are successively
Concatenation；The anti-reverse unit is diode.
The further design of the acceleration sensor apparatus steadily comfortably detected for the axle of standard EMUs three is,
Solder joint on pcb board component and connected between the lead of signal cable with flexible cord, the flexible cord passes through the through hole.
The further design of the acceleration sensor apparatus steadily comfortably detected for the axle of standard EMUs three is,
PCB bottom plates and PCB top plates are double-layer PCB board structure, and nylon bolt and Stud connection, two layers of pcb board are used between double-layer PCB board
Respectively correspondingly it is provided with power circuit part and signal processing circuit portion point.
The further design of the acceleration sensor apparatus steadily comfortably detected for the axle of standard EMUs three is,
Signal cable is multicore tin-plating belt shielded conductor.
The further design of the acceleration sensor apparatus steadily comfortably detected for the axle of standard EMUs three is,
The cable connector includes stringing sheath, connector connector and leading-out terminal, the stringing sheath, connector connector with
And leading-out terminal is sequentially connected, the connector connector is connected with signal cable.
The further design of the acceleration sensor apparatus steadily comfortably detected for the axle of standard EMUs three is,
Signal cable is connected by hose clamp with joint, and the joint is Harding's plug.
Advantages of the present invention is as follows：
The power circuit for being used for the acceleration sensor apparatus that the axle of standard EMUs three steadily comfortably detects of the present invention is by steady
Pressure gives micromechanics (MEMS) capacitive accelerometer and microprocessor power supply of three tunnel orthogonal verticals respectively, No. three accelerometers
Differential signal is used for orthogonal vertical amendment and compensating for frequency response by microprocessor internal algorithm, used after overdamping and AD samplings
SPI mouths DA exports three road current signals, and self-test signal is provided by ppu, and corresponding each road feedback bears electric current during full scale
Output, realizes the measurement to the steady acceleration of three direction of principal axis.Sensor metal shell and protecting pipe are as protection and shielding, line
Cable and connector are connected with steady comfortable detecting system.The device is using ripe accelerometer chip, using modularized circuit
Simple and reliable with structure design thinking, product is easy to produce in batches.
Brief description of the drawings
Fig. 1 is the structural representation of the acceleration sensor apparatus steadily comfortably detected for the axle of standard EMUs three.
Fig. 2 is MEMS capacitive accelerometer structural representation.
Fig. 3 is the circuit diagram of power supply and translation circuit.
Fig. 4 is sensor sensitivity direction and coordinate system schematic diagram.
Fig. 5 is the schematic diagram of accelerometer cell.
Embodiment
The application is further illustrated below in conjunction with the accompanying drawings.
Such as Fig. 1, the acceleration sensor apparatus for being used for the axle of standard EMUs three and steadily comfortably detecting of the present embodiment, with prison
Control main-machine communication connection, including three dimension acceleration sensor, signal cable 8, cable connector, joint 11 and cable sheath tube
9, three dimension acceleration sensor is communicated to connect by one end of cable connector and signal cable, and the periphery of signal cable sets electricity
Cable protecting pipe, the other end of signal cable are communicated to connect by joint and monitoring host computer.
The three dimension acceleration sensor of the present embodiment mainly by shell 1, cap 4, interior cap 3, AB silica gel, provided with through hole
Semiclosed inner casing 2 and wiring board composition.Inner casing 2 is in shell, and wiring board is located in inner casing 2, and interior cap 3 is covered in inner casing
AB silica gel is poured on 2 and in inner casing 2 with enlarged cavities size, facilitates circuit board to install and fix.Wiring board is by PCB bottom plates
14th, PCB lateral plate components and PCB top plates 16 form.PCB bottom plates 14 are flatly fixed on shell 1 and PCB bottom plates 14 are provided with
Z axis acceleration chip, PCB lateral plate components are made up of three pieces of pcb boards, respectively the first PCB side plates provided with X-axis acceleration chip
18th, the 2nd PCB side plates 15 provided with Y-axis acceleration chip and provided with three road voltage signals are switched into the 3rd of current signal
PCB side plates 17.First PCB side plates 18, the 2nd PCB side plates 15 and the 3rd PCB side plates 17 are arranged at PCB bottom plates 14 and PCB and pushed up
Between plate 16 and it is each perpendicular to PCB bottom plates 14 and PCB top plates 16.2nd PCB side plates 15 and the 3rd PCB side plates 17 are perpendicular to first
PCB side plates 18 are set.Interior intracavitary pours into the AB silica gel.The end face of PCB bottom plates 14 and shell 1 is affixed in the present embodiment, outside
The affixed cap 4 in other end of shell 1.Inner casing 2 is provided with interior cap 3 with respect to the side of top plate.
Three axles in the present embodiment（Three axles refer to X-axis, Y-axis and Z axis respectively）Acceleration chip is sealed using 20 pin LCC
Dress, is encapsulated as paster, sensitive direction is axially perpendicular to sensor bottom surface, and the direction of sensor bottom surface is acted on as just using arrow
To referring to Fig. 4.It is under installation measurement car bottom in view of sensor, tests vertical, course, longitudinal direction acceleration, PCB
The orthogonal corner of three axles that 3-axis acceleration chip 14 is placed in housing during drawing rigidly fixes place, and 3-axis acceleration chip 14
Pcb board needs orthogonal vertical to install.
The accelerometer cell of 3-axis acceleration chip such as Fig. 5, mainly by mass 142, electrode 143, substrate 141 and branch
Support 144.Electrode 143 is arranged in substrate 141, and mass 142 is supported in substrate 141 by support frame 144 and forms lever
Part, gap is left between mass 142 and electrode 143.
Further, inner chamber is isolated pcb board component and shell 1 by nylon stud and bolt and epoxy plate, and three
Axle acceleration chip 14 is fixed by black epoxy resin with housing, and 3-axis acceleration chip use level post before fixation steeps
Perpendicular quadrature between the level and pcb board of steel square adjustment chip.
Such as Fig. 4, three axles of the present embodiment steadily detect acceleration transducer shell and use stainless steel metal, and profile is side
Shape, sensor have 2 positioning holes of Ф 11, and mounting hole is parallel or vertical perpendicular to mounting surface, pitch-row 98mm, three shaft detection directions
Directly in 2 positioning hole line directions.
The 3-axis acceleration chip 14 of the present embodiment is micromechanics (MEMS) capacitive accelerometer.Micro-mechanical capacitance type adds
Its sensitive part of speedometer is differential capacitance structure, can be reflected using the change of differential capacitance by the feelings of acceleration signals
Condition, its structure is made up of inertia sensing unit and servo electronics two parts, referring to Fig. 2.
Such as Fig. 1, pcb board 14 is pcb board bottom plate, there is Z axis acceleration chip circuit and CPU single chip circuits above；Pcb board
15 and pcb board 18 be side plate, pcb board 15 is provided with Y acceleration chip circuit axles, pcb board 18 is provided with X-axis acceleration core
Piece circuit；Pcb board 17 is VI plates, for three road voltage signals to be switched into current signal；Pcb board 16 is power supply circuit board, above
There are protection and mu balanced circuit.
Contain on pcb board bottom plate 14：AD sample conversions circuit, microprocessor and self-test detection circuit.Wherein, AD is adopted
Sample change-over circuit, receives the analog signal of 3-axis acceleration chip collection respectively, and is converted into data signal output.The present embodiment
AD sample conversion circuits sample rate up to 100KHZ, take its difference to send microprocessor to handle.In view of the simplification of circuit
With Technical specification requirement, the series monolithic with AD samplings can be selected, it is to use enhanced CPU, 1T, single clock/machine
In the cycle, instruction code completely compatible traditional 8051, operating voltage 3.5V ~ 5.5V, 1280 byte RAM are integrated on piece, there is 12,8 tunnel
Precision A/D C, conversion speed have internal EEPROM up to 250K/S.
Microprocessor, three railway digital signal in orthogonal vertical properties are made by inverse matrix algorithm by inverse matrix scheme and being repaiied
Just, and according to first-order filtering algorithm, to frequency response 0-100HZ（-3DB）Make compensation.
The switching signal that self-test detection circuit reception processing device is given by relay, the negative full scale of the corresponding feedback of electric current output
When output.Using electronic switch characteristic, switched by port level control switch, act on microprocessor interrupt mouth, while three
Road current source output self-test current signal.
3rd PCB side plates 17 are provided with DA current sources, the control signal exported according to microprocessor, and output digit signals are corresponding
Linear current.AD5420 converters are selected in the DA current sources output of the present embodiment, and it is inexpensive, accurate, fully-integrated 16
Bit pad, there is provided programmable current source exports, and can meet the needs of industrial stokehold application.
Harder in view of cable tail, weldering such as runs into vibration environment and produces stress in the circuit board, fracture rosin joint occurs
May, connected between the lead of solder joint and signal cable of the present embodiment on pcb board component with flexible cord, flexible cord passes through through hole.
The bore of housing output port is reasonably designed according to the external diameter of wire, wire will put two groups of sealing rings and pad
Circle, then tightened with watertight connector, on the premise of degree of protection IP67 is ensured compliance with, it is easy to reach assembling.
Pcb board 14,15,16 and 18 is double-layer PCB board structure, and nylon bolt and stud are used between double-layer PCB board
Connection, two layers of pcb board are respectively correspondingly provided with power circuit part and signal processing circuit portion point.Realize digital circuit and mould
Intend circuit separation, beneficial to electromagnetic compatibility anti-interference.On the other hand, slot milling facilitates housing lead port lines to connect on pcb board
Enter, avoid cable from getting lodged in the disadvantage of terminal stud entirely, both inconvenient wiring, be also unfavorable for the installation of circuit board.
The cable core of signal cable is multicore tin-plating belt shielded conductor, meets standard EN50306-4.Sensor is from powered
Cable（Including connector）Length is not less than 1500mm, line footpath specification：7×0.75mm2。
Cable connector includes stringing sheath 5, connector connector 6 and leading-out terminal 7, stringing sheath 5, connector connection
Device 6 and leading-out terminal 7 are sequentially connected, and connector connector is connected with signal cable.
Signal cable is connected by hose clamp 10 with joint 11, and joint 11 is Harding's plug.The present embodiment is selected and joint phase
The private jack of adaptation, is 19400030410, HARTING brand sockets, degree of protection IP67.
Such as Fig. 3, pcb board component also includes power supply and translation circuit, and power supply and translation circuit include anti-reverse
Unit, antisurge device, low pressure difference linearity regulated converter, fuse current-limiting fuse slowly, and fuse current-limiting fuse, antisurge slowly
Device, low pressure difference linearity regulated converter and anti-reverse unit are sequentially connected electrically；Antisurge device includes thermistor, first
Inductance and voltage-regulator diode, thermistor, the first inductance and voltage-regulator diode mutually connect two-by-two；Low pressure difference linearity voltage stabilizing
Converter includes the second inductance, electric capacity and the 3rd inductance, and the second inductance, electric capacity and the 3rd inductance are sequentially connected in series；It is anti-reverse
Unit is diode.The present embodiment low pressure difference linearity regulated converter selection LT3060, its feature micropower, low noise,
100mA, it is low pressure difference linear voltage regulator.
The cable cover(ing) tube material of the present embodiment is flame retardant rubber, cable cover(ing) external diameter：20 ± 2mm, minimum bending radius
100mm.The invention is not restricted to fire-retardant rubber material, and gas oil resistivity, resistance to purple should be taken into full account when selecting cable cover(ing) tube material
The characteristics such as UV radiation, resistance to pummel, pliability simultaneously pass through correlation test.
The power circuit for being used for the acceleration sensor apparatus that the axle of standard EMUs three steadily comfortably detects of the present embodiment
Give micromechanics (MEMS) capacitive accelerometer and microprocessor power supply of three tunnel orthogonal verticals respectively by voltage stabilizing, three tunnels accelerate
The differential signal of meter is spent after overdamping and AD samplings, is used for orthogonal vertical amendment by microprocessor internal algorithm and frequency response is mended
Repay, three road current signals are exported with SPI mouths DA, self-test signal is provided by ppu, when corresponding each road feedback bears full scale
Electric current output, realize the measurement to the steady acceleration of three direction of principal axis.Sensor metal shell and protecting pipe as protection and
Shielding, cable and connector are connected with steady comfortable detecting system.The device is using ripe accelerometer chip, using module
Change circuit and structure design thinking, simple and reliable, product is easy to produce in batches.
More than, it is only the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and it is any
Those familiar with the art the invention discloses technical scope in, technique according to the invention scheme and its invention
Design is subject to equivalent substitution or change, is all included within the scope of the present invention.
Claims (10)
- A kind of 1. acceleration sensor apparatus steadily comfortably detected for the axle of standard EMUs three, with monitoring host computer communication link Connect, it is characterised in that described including three dimension acceleration sensor, signal cable, cable connector, joint and cable sheath tube Three dimension acceleration sensor is communicated to connect by one end of cable connector and signal cable, and the periphery of the signal cable is set The cable sheath tube, the other end of the signal cable are communicated to connect by joint and monitoring host computer；The three-dimensional acceleration Sensor includes shell, cap, AB silica gel, semiclosed inner casing and wiring board provided with through hole, and the inner casing is located at described outer In shell, the wiring board be located at inner casing in signal cable communicate to connect, the wiring board by PCB bottom plates, PCB lateral plate components with And PCB top plates composition, PCB Floor waters level land is fixed on shell and PCB bottom plates are provided with Z axis acceleration chip, PCB side plate groups Part is made up of three pieces of pcb boards, respectively the first PCB side plates provided with X-axis acceleration chip, provided with Y-axis acceleration chip Two PCB side plates and provided with the 3rd PCB side plates that three road voltage signals are switched to current signal, the first PCB side plates, second PCB side plates and the 3rd PCB side plates are arranged between PCB bottom plates and PCB top plates and are each perpendicular to PCB bottom plates and PCB top plates, the Two PCB side plates and the 3rd PCB side plates are set perpendicular to the first PCB side plates, and interior intracavitary pours into the AB silica gel.
- 2. the acceleration sensor apparatus according to claim 1 steadily comfortably detected for the axle of standard EMUs three, its It is characterised by that the inner casing is isolated pcb board component and shell by nylon stud and bolt and epoxy plate, the PCB bottoms Plate is fixed by black epoxy resin with housing, and X-axis acceleration chip steeps the level of adjustment chip, PCB sides by horizontal columns Plate and PCB bottom plates by steel square adjust posture with the perpendicular quadrature between ensuring.
- 3. the acceleration sensor apparatus according to claim 2 steadily comfortably detected for the axle of standard EMUs three, its It is characterised by being additionally provided with PCB bottom plates：AD sample conversion circuits, receive the analog signal of 3-axis acceleration chip collection respectively, and are converted into three railway digital signals Output；Microprocessor, amendment is made to three railway digital signal in orthogonal vertical properties by inverse matrix algorithm, and according to first-order filtering Algorithm, compensation is made to frequency response；Self-test detects circuit, the switching signal that reception processing device is given by relay, self-test detection electricity is controlled according to switching signal The switching of road internal electron switch simultaneously acts on microprocessor interrupt mouth, final output self-test current signal.
- 4. the acceleration sensor apparatus according to claim 2 steadily comfortably detected for the axle of standard EMUs three, its It is characterised by that the 3rd PCB side plates are provided with DA current sources, the control signal exported according to microprocessor, exports the data signal pair Answer linear current.
- 5. the acceleration sensor apparatus according to claim 1 steadily comfortably detected for the axle of standard EMUs three, its It is characterised by that the PCB top plates are provided with power supply and translation circuit, the power supply and translation circuit include anti-reverse Unit, antisurge device, low pressure difference linearity regulated converter, fuse current-limiting fuse slowly, the slow fusing current-limiting fuse, anti- Surge device, low pressure difference linearity regulated converter and anti-reverse unit are sequentially connected electrically；The antisurge device includes temperature-sensitive Resistance, the first inductance and voltage-regulator diode, the thermistor, the first inductance and voltage-regulator diode mutually connect two-by-two； The low pressure difference linearity regulated converter includes the second inductance, electric capacity and the 3rd inductance, second inductance, electric capacity and Three inductance are sequentially connected in series；The anti-reverse unit is diode.
- 6. the acceleration sensor apparatus according to claim 1 steadily comfortably detected for the axle of standard EMUs three, its Connected between the solder joint and the lead of signal cable that are characterised by pcb board component with flexible cord, the flexible cord passes through the through hole.
- 7. the acceleration sensor apparatus according to claim 1 steadily comfortably detected for the axle of standard EMUs three, its It is characterised by that PCB bottom plates and PCB top plates are double-layer PCB board structure, nylon bolt and Stud connection is used between double-layer PCB board, Two layers of pcb board is respectively correspondingly provided with power circuit part and signal processing circuit portion point.
- 8. the acceleration sensor apparatus according to claim 1 steadily comfortably detected for the axle of standard EMUs three, its It is multicore tin-plating belt shielded conductor to be characterised by signal cable.
- 9. the acceleration sensor apparatus according to claim 1 steadily comfortably detected for the axle of standard EMUs three, its It is characterised by that the cable connector includes stringing sheath, connector connector and leading-out terminal, the stringing sheath, connector Connector and leading-out terminal are sequentially connected, and the connector connector is connected with signal cable.
- 10. the acceleration sensor apparatus according to claim 1 steadily comfortably detected for the axle of standard EMUs three, its It is characterised by that signal cable is connected by hose clamp with joint, the joint is Harding's plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711081597.7A CN107703330A (en) | 2017-11-07 | 2017-11-07 | The acceleration sensor apparatus steadily comfortably detected for the axle of standard EMUs three |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711081597.7A CN107703330A (en) | 2017-11-07 | 2017-11-07 | The acceleration sensor apparatus steadily comfortably detected for the axle of standard EMUs three |
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| CN107703330A true CN107703330A (en) | 2018-02-16 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109045641A (en) * | 2018-09-10 | 2018-12-21 | 哈尔滨工业大学 | A kind of paddler's motion capture equipment |
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| US11796554B2 (en) * | 2021-09-09 | 2023-10-24 | China Oil & Gas Pipeline Network Corporation | Integrated acceleration, speed and vibration sensor |
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