CN205808651U - A kind of bridge beam body deformation sensor-based system and sensor - Google Patents
A kind of bridge beam body deformation sensor-based system and sensor Download PDFInfo
- Publication number
- CN205808651U CN205808651U CN201620411033.XU CN201620411033U CN205808651U CN 205808651 U CN205808651 U CN 205808651U CN 201620411033 U CN201620411033 U CN 201620411033U CN 205808651 U CN205808651 U CN 205808651U
- Authority
- CN
- China
- Prior art keywords
- detection signal
- beam body
- stock
- force
- quarter butt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The utility model discloses a kind of bridge beam body deformation sensor-based system and sensor, this utility model is by being respectively provided with the first and second force-balance accelerometers of correspondence on the quarter butt and stock of double rod type installing rack, stock two ends are fixed on beam body, quarter butt is movably attached to one end of stock by connecting rod, and only fixes quarter butt near the one end connected.Owing to quarter butt only has one end to be fixed in beam body, the force-balance accelerometer being arranged on quarter butt only senses the extensional vibration acceleration of beam body, and owing to all fixing with beam body at the two ends of stock, the force-balance accelerometer being arranged on stock both can sense the extensional vibration acceleration of beam body, it is also possible to the lateral angular acceleration of sensing beam body.Therefore, the output of two force-balance accelerometers is subtracted each other can obtain horizontal corner parameter easily.Thus, no longer calculate amount of deflection according to integration fitting process, can effectively eliminate the extensional vibration impact on test result of bridge beam body simultaneously.
Description
Technical field
This utility model relates to the test of bridge moving force-responsive and high-speed railway bridge safety monitoring field, is specifically related to one
Bridge beam body deformation sensor-based system and sensor.
Background technology
Bridge is under the constantly effect of driving vehicle, and its beam body produces the deformation of obvious dynamic bending.Compare common ferrum
Road and bridge beam, the dynamic bending deformation of the beam body of high-speed railway bridge has tightened up restriction, because if the dynamic deformation of beam body
Excessive, cause bullet train excessive with the mutual frictional force of rail, and then affect the travel speed of bullet train, add at a high speed
The danger of train derailing.Bridge beam body laterally moves corner and vertical dynamic deflection is to analyze bridge moving force-responsive characteristic variations and fortune
The important references index of battalion's safety.Existing bridge lateral of can simultaneously monitoring moves the system of corner and vertical dynamic deflection and is mainly base
In high-precision mechanical servo formula deformation instrument, and test data are calculated acquisition via integration fitting process.This kind of system with
In time monitoring simple structure bridge, there is higher precision, but there is following shortcoming: (1), volume ratio are bigger；(2), by
The least in range, often need after installing, carry out manual accurately zeroing；(3) the cross-spring sheet of machinery pendulum mass motion, is controlled
Warm ticket effect the error of test result is affected bigger, cause output valve to there is bigger drift after extended periods.(4)、
When labyrinth bridge, position and quantitative requirement to measuring point are higher, need than comparatively dense, reasonably arrange shape
Becoming instrument, if not or position is the most right for the quantity of layout deformation instrument, then the error in the amount of deflection being integrated into by corner is bigger.(5)、
Owing to deformation instrument can sense the horizontal corner of beam body, the extensional vibration acceleration of beam body, its monitoring result also can be sensed
Affected greatly by the extensional vibration of beam body.
Utility model content
In view of this, the utility model proposes a kind of bridge beam body deformation sensor-based system and sensor, with convenient
The horizontal of labyrinth bridge is moved corner and the long term monitoring of vertical dynamic deflection by ground, solves and improves the use of existing system not
Convenience, poor stability, beam body extensional vibration affect the most dynamic big, to be difficult to use in labyrinth bridge corner and vertical dynamic deflection
The shortcoming such as long term monitoring.
First aspect, it is provided that a kind of bridge beam body deformation sensor-based system, including:
Installing rack, including stock, quarter butt and connecting rod, wherein, described stock two ends are provided with fixing seat, described quarter butt with
Described connecting rod is fixed, and described connecting rod is flexibly connected with one end of described stock, and described quarter butt is only with described connecting rod even
The one end connect is provided with fixing seat；
First force-balance accelerometer, is arranged at described quarter butt one end away from fixing seat, for detecting position
Extensional vibration acceleration exports the first analog detection signal；
Second force-balance accelerometer, is arranged on described stock, is used for detecting lateral angular acceleration and extensional vibration adds
Speed exports the second analog detection signal；
Data acquisition transmitting device, is connected with described first force-balance accelerometer and the second accelerometer, for by institute
State the first analog detection signal and the second analog detection signal is respectively converted into the first digital detection signal and the second Digital Detecting
Signal also transmits to data processing equipment；
Data processing equipment, communicates to connect with described data acquisition transmitting device, for according to the second digital detection signal
With the detection signal that the output of the difference of the first digital detection signal characterizes horizontal corner.
Preferably, described first force-balance accelerometer and the second force-balance accelerometer are MEMS dynamic balance acceleration
Meter.
Preferably, described fixing seat is that seat fixed by ferromagnetic material.
Preferably, described stock and described quarter butt use polyformaldehyde-Teflon (POM+PTFE) composite to make.
Preferably, described data acquisition transmitting device includes:
Analog-to-digital conversion module, for being respectively converted into the by described first analog detection signal and the second analog detection signal
One digital detection signal and the second digital detection signal；
Wireless transport module, for wirelessly sending described first digital detection signal to described data processing equipment
With the second digital detection signal；And
Control module, is used for controlling described analog-to-digital conversion module and described wireless transport module.
Preferably, described data monitoring device is for the length according to described stock and the detection of the horizontal corner of described sign
Signal calculates the absolute amount of deflection difference of stock, vertically scratches according to the absolute of absolute amount of deflection mathematic interpolation beam body of multiple diverse locations
Angle value.
Preferably, described data processing equipment is by the second digital detection signal and the difference of the first digital detection signal
Carry out characterizing described in arc tangent transformation calculations the detection signal of horizontal corner.
Preferably, described system also includes:
Battery；And
Power management module, is connected with described battery, for adding for described first force-balance accelerometer, the second dynamic balance
Velometer and described data acquisition transmitting device are powered.
Preferably, described connecting rod is flexibly connected by double freedom hinge with one end of described stock.
Second aspect, it is provided that a kind of bridge beam body changing sensor, including:
Installing rack, including stock, quarter butt and connecting rod, wherein, described stock two ends are provided with fixing seat, described quarter butt with
Described connecting rod is fixed, and described connecting rod is flexibly connected with one end of described stock, and described quarter butt is only with described connecting rod even
The one end connect is provided with fixing seat；
First force-balance accelerometer, is arranged at described quarter butt one end away from fixing seat, for detecting position
Extensional vibration acceleration exports the first analog detection signal；
Second force-balance accelerometer, is arranged on described stock, is used for detecting lateral angular acceleration and extensional vibration adds
Speed exports the second analog detection signal；
Data acquisition transmitting device, is connected with described first force-balance accelerometer and the second accelerometer, for by institute
State the first analog detection signal and the second analog detection signal is respectively converted into the first digital detection signal and the second Digital Detecting
Signal also transmits to data processing equipment.
This utility model by arranging double rod type installing rack, the stock of two ends fixing and mounting bracket, simultaneously short by installing rack
Bar is movably attached to one end of stock by connecting rod, and only fixes quarter butt near the one end connected.Meanwhile, at installing rack
The first and second force-balance accelerometers of correspondence it are respectively provided with on quarter butt and stock.Owing to quarter butt only has one end to be fixed on beam body
On, the force-balance accelerometer being arranged on quarter butt only senses the extensional vibration acceleration of beam body, and due to stock two ends all
Fixing with beam body, the force-balance accelerometer being arranged on stock both can sense the extensional vibration acceleration of beam body, it is also possible to
The lateral angular acceleration of sensing beam body.Therefore, the output of two force-balance accelerometers is subtracted each other both can remove extensional vibration
Acceleration, thus, it is possible to obtain horizontal corner parameter easily.Based on horizontal corner parameter, amount of deflection etc. can be calculated easily
Parameter.Therefore, this process no longer calculates amount of deflection according to integration fitting process, unrelated with bridge structure, can monitor any kind of
The vertical dynamic deflection of bridge and the most dynamic corner.
Accompanying drawing explanation
By description to this utility model embodiment referring to the drawings, of the present utility model above-mentioned and other mesh
, feature and advantage will be apparent from, in the accompanying drawings:
Fig. 1 is the circuit diagram of the bridge beam body deformation sensor-based system of this utility model embodiment；
Fig. 2 is the schematic diagram of the installing rack of this utility model embodiment.
Detailed description of the invention
Below based on embodiment, this utility model is described, but this utility model is not restricted to these to be implemented
Example.In below details of the present utility model being described, detailed describe some specific detail sections.To people in the art
The description not having these detail sections for Yuan can also understand this utility model completely.Of the present utility model in order to avoid obscuring
Essence, the narration the most in detail of known method, process, flow process, element and circuit.
Additionally, it should be understood by one skilled in the art that accompanying drawing is provided to descriptive purpose provided herein, and
Accompanying drawing is not necessarily drawn to scale.
Unless the context clearly requires otherwise, otherwise entire disclosure is similar with " including ", " comprising " in claims etc.
Word should be construed to the implication that comprises rather than exclusive or exhaustive implication；It is to say, be containing of " including but not limited to "
Justice.
In description of the present utility model, it is to be understood that term " first ", " second " etc. are only used for describing purpose,
And it is not intended that indicate or hint relative importance.Additionally, in description of the present utility model, except as otherwise noted, " many
Individual " it is meant that two or more.
Fig. 1 is the schematic diagram of the bridge beam body deformation sensor-based system of this utility model embodiment；Fig. 2 is that this utility model is real
Execute the schematic diagram of the installing rack of example.As depicted in figs. 1 and 2, described bridge beam body deformation sensor-based system includes installing rack 1, first
Force-balance accelerometer the 2, second force-balance accelerometer 3, data acquisition transmitting device 4 and data processing equipment 5.Wherein, peace
Shelve 1, first force-balance accelerometer the 2, second force-balance accelerometer 3 and data collecting transmitter 4 constitutes a bridge
Beam beam body changing sensor.Data processing equipment 5 can communicate to connect with multiple such changing sensors.
Wherein, as in figure 2 it is shown, installing rack 1 includes stock 11, quarter butt 12 and connecting rod 13.Quarter butt 12 is used for fixing first
Force-balance accelerometer 2 is to detect the extensional vibration acceleration of beam body.Stock 11 be used for fixing the second force-balance accelerometer 3 with
Detect the extensional vibration acceleration of beam body, it is also possible to the lateral angular acceleration of sensing beam body simultaneously.Specifically, stock 11 two ends set
It is equipped with fixing seat 14.Described fixing seat is for fixing stock 11 with beam body.Owing to stock two ends the most beam body are fixed, therefore,
The horizontal and vertical deformation of beam body all can be passed to stock being set and be detected with the second force-balance accelerometer 3 thereon.Meanwhile,
Quarter butt 12 is connected with stock by connecting rod 13.Further, described installing rack is arranged in one end that quarter butt 12 is connected with connecting rod 13
There is a fixing seat 14 so that this end of quarter butt 12 is fixed to beam body.Meanwhile, quarter butt 12 is not fixed away from one end of connecting rod 13.
That is, described quarter butt is only provided with fixing seat in the one end being connected with described connecting rod.Connecting rod 13 is alive with one end of stock 11
It is dynamically connected, to facilitate the relative position of regulation stock and quarter butt so that during installation, installing rack is easily installed in Bridge Beam
Each position of body.Preferably, connecting rod 13 is flexibly connected by double freedom hinge 15 with stock 11, so that more
Add convenient regulation.
Meanwhile, fixing seat 14 could be arranged to the fixing seat of ferromagnetic material (such as sintered NdFeB Magnet).Owing to beam body is led to
Often including steel, ferromagnetic material can adsorb and sticks just, and using ferromagnetic material manufacture to fix seat 14 can conveniently install and determine
Position.
Easy to understand, the size of the horizontal corner of stock 11 is by the deformation of stock 11 self and the vertical displacement at stock two ends
Difference determines.It will be apparent that the horizontal corner value that the vertical displacement difference at stock 11 two ends causes is our required value.In order to subtract
The flexural deformation of the youthful and the elderly's bar self, carbon fibre composite (such as polyformaldehyde-ferrum fluorine that we have employed light weight, rigidity is big
Dragon (POM+PTFE) mixed type composite) manufacture stock 11, quarter butt 12 and connecting rod 13.
Circuit aspect, the first force-balance accelerometer 2 is arranged at quarter butt 12 one end away from fixing seat 14, is used for detecting institute
Extensional vibration acceleration in position exports the first analog detection signal.
Second force-balance accelerometer 3 is arranged on stock 11, is used for detecting lateral angular acceleration and extensional vibration is accelerated
Degree output the second analog detection signal.
Specifically, the first force-balance accelerometer 2 and the second force-balance accelerometer 3 can be adopted as MEMS dynamic balance and add
Velometer, such as, the circuit built based on SCA103T chip.MEMS force-balance accelerometer be a kind of can sensation level to
Acceleration of vibration also can sense the sensor of angular acceleration, its angular acceleration values carries out arc tangent conversion and can obtain position
Laterally corner value.Comparing traditional mechanical servo formula inclinator, the high-precision force-balance accelerometer of MEMS uses electricity
Minor servo pendulum mass, adds temperature-compensation circuit simultaneously, has the advantages such as volume drift little, warm is little, range is big.Owing to MEMS is high
The range ratio of the force-balance accelerometer of precision is relatively big, is much smaller than range by installing the initial corner value brought, is therefore not required to
Want manual accurately zeroing.
Data acquisition transmitting device 4 is connected with the first force-balance accelerometer 2 and the second accelerometer 3, for by described
First analog detection signal and the second analog detection signal are respectively converted into the first digital detection signal and the second Digital Detecting letter
Number and transmit to data processing equipment 5.Specifically, data acquisition transmitting device 4 can include analog-to-digital conversion module 41, wireless biography
Defeated module 42 and control module 43.
Analog-to-digital conversion module 41 is for being respectively converted into described first analog detection signal and the second analog detection signal
First digital detection signal and the second digital detection signal.Preferably, analog-to-digital conversion module 41 can be with AD7606 chip as core
The heart, supporting peripheral circuit is constituted.
Wireless transport module 42 is for wirelessly sending described first Digital Detecting letter to described data processing equipment
Number and the second digital detection signal.Wireless transport module 42 can process dress based on existing various wireless communication interfaces with data
Put and communicate.Preferably, wireless transport module 420 uses by CC2530 chip is the DRF2617A-that core is constituted
ZigBee wireless module realizes.Should be understood that wireless transport module 42 can also use module based on other communication protocols real
Existing.
Control module 43 is used for controlling analog-to-digital conversion module 41 and described wireless transport module 42.Preferably, control module
43 with MSP430 chip as core, and supporting peripheral resistance and electric capacity are constituted.
Preferably, described data acquisition transmitting device 4 can be supplied by battery with first, second force-balance accelerometer
Electricity, thus, it is possible to further facilitate installation.Putting before this, system includes battery 6 and power management module 7.Power management mould
Block 7 is connected with battery 6, for managing the charge-discharge operations of battery 6, and can be data acquisition transmitting device 4 and first,
Second force-balance accelerometer provides stable voltage or electric current.
Data processing equipment 5 communicates to connect with data acquisition transmitting device 4, for according to the second digital detection signal and the
The difference output of one digital detection signal characterizes the detection signal of horizontal corner.
As it has been described above, the extensional vibration acceleration of the first force-balance accelerometer 2 the sensing beam body being arranged on quarter butt,
And the second force-balance accelerometer 3 being arranged on stock both can sense the extensional vibration acceleration of beam body, it is also possible to sensing
The lateral angular acceleration of beam body.Therefore, the output of two force-balance accelerometers is subtracted each other (namely the second digital detection signal subtracts
Remove the first digital detection signal) just can remove the impact of extensional vibration acceleration, obtain lateral angular acceleration parameter.Specifically
Ground, described data processing equipment is by carrying out shear anyway to the difference of the second digital detection signal and the first digital detection signal
Change to calculate and obtain the detection signal characterizing horizontal corner.And then, detection signal based on the horizontal corner of sign, data processing equipment
5 can calculate the parameters such as amount of deflection easily.
Preferably, described data processing equipment 5 is additionally operable to the length according to described stock and the horizontal corner of described sign
Detection signal calculates the absolute amount of deflection difference of stock, erects according to the absolute of absolute amount of deflection mathematic interpolation beam body of multiple diverse locations
To deflection value.
This utility model by arranging double rod type installing rack, the stock of two ends fixing and mounting bracket, simultaneously short by installing rack
Bar is movably attached to one end of stock by connecting rod, and only fixes quarter butt near the one end connected.Meanwhile, at installing rack
The first and second force-balance accelerometers of correspondence it are respectively provided with on quarter butt and stock.Owing to quarter butt only has one end to be fixed on beam body
On, the force-balance accelerometer being arranged on quarter butt only senses the extensional vibration acceleration of beam body, and due to stock two ends all
Fixing with beam body, the force-balance accelerometer being arranged on stock both can sense the extensional vibration acceleration of beam body, it is also possible to
The lateral angular acceleration of sensing beam body.Therefore, the output of two force-balance accelerometers is subtracted each other both can remove extensional vibration
Acceleration, thus, it is possible to obtain horizontal corner parameter easily.Based on horizontal corner parameter, amount of deflection etc. can be calculated easily
Parameter.Therefore, this process no longer calculates amount of deflection according to integration fitting process, unrelated with bridge structure, can monitor any kind of
The vertical dynamic deflection of bridge and the most dynamic corner.Can effectively eliminate the extensional vibration shadow to test result of bridge beam body simultaneously
Ring.
The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, for this area
For technical staff, this utility model can have various change and change.All institutes within spirit of the present utility model and principle
Any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (8)
1. a bridge beam body deformation sensor-based system, it is characterised in that including:
Installing rack, including stock, quarter butt and connecting rod, wherein, described stock two ends are provided with fixing seat, and described quarter butt is with described
Connecting rod is fixed, and described connecting rod is flexibly connected with one end of described stock, and described quarter butt is only being connected with described connecting rod
One end is provided with fixing seat；
First force-balance accelerometer, is arranged at described quarter butt one end away from fixing seat, for detecting the longitudinal direction of position
Acceleration of vibration exports the first analog detection signal；
Second force-balance accelerometer, is arranged on described stock, is used for detecting lateral angular acceleration and extensional vibration acceleration
Export the second analog detection signal；
Data acquisition transmitting device, is connected with described first force-balance accelerometer and the second accelerometer, for by described the
One analog detection signal and the second analog detection signal are respectively converted into the first digital detection signal and the second digital detection signal
And transmit to data processing equipment；
Data processing equipment, communicates to connect with described data acquisition transmitting device, for according to the second digital detection signal and the
The difference output of one digital detection signal characterizes the detection signal of horizontal corner.
Bridge beam body deformation sensor-based system the most according to claim 1, it is characterised in that described first dynamic balance acceleration
Meter and the second force-balance accelerometer are MEMS force-balance accelerometer.
Bridge beam body deformation sensor-based system the most according to claim 1, it is characterised in that described fixing seat is ferromagnetic material
Fixing seat.
Bridge beam body deformation sensor-based system the most according to claim 1, it is characterised in that described stock and described quarter butt are adopted
Make with polyformaldehyde-Teflon (POM+PTFE) composite.
Bridge beam body deformation sensor-based system the most according to claim 1, it is characterised in that described data acquisition transmitting device
Including:
Analog-to-digital conversion module, for being respectively converted into the first number by described first analog detection signal and the second analog detection signal
Word detection signal and the second digital detection signal；
Wireless transport module, for wirelessly sending described first digital detection signal and the to described data processing equipment
Two digital detection signals；And
Control module, is used for controlling described analog-to-digital conversion module and described wireless transport module.
Bridge beam body deformation sensor-based system the most according to claim 1, it is characterised in that described system also includes:
Battery；And
Power management module, is connected with described battery, is used for as described first force-balance accelerometer, the second dynamic balance acceleration
Meter and described data acquisition transmitting device are powered.
Bridge beam body deformation sensor-based system the most according to claim 1, it is characterised in that described connecting rod and described stock
One end be flexibly connected by double freedom hinge.
8. a bridge beam body changing sensor, it is characterised in that including:
Installing rack, including stock, quarter butt and connecting rod, wherein, described stock two ends are provided with fixing seat, and described quarter butt is with described
Connecting rod is fixed, and described connecting rod is flexibly connected with one end of described stock, and described quarter butt is only being connected with described connecting rod
One end is provided with fixing seat；
First force-balance accelerometer, is arranged at described quarter butt one end away from fixing seat, for detecting the longitudinal direction of position
Acceleration of vibration exports the first analog detection signal；
Second force-balance accelerometer, is arranged on described stock, is used for detecting lateral angular acceleration and extensional vibration acceleration
Export the second analog detection signal；
Data acquisition transmitting device, is connected with described first force-balance accelerometer and the second accelerometer, for by described the
One analog detection signal and the second analog detection signal are respectively converted into the first digital detection signal and the second digital detection signal
And transmit to data processing equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620411033.XU CN205808651U (en) | 2016-05-09 | 2016-05-09 | A kind of bridge beam body deformation sensor-based system and sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620411033.XU CN205808651U (en) | 2016-05-09 | 2016-05-09 | A kind of bridge beam body deformation sensor-based system and sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205808651U true CN205808651U (en) | 2016-12-14 |
Family
ID=58144144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620411033.XU Expired - Fee Related CN205808651U (en) | 2016-05-09 | 2016-05-09 | A kind of bridge beam body deformation sensor-based system and sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205808651U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105910779A (en) * | 2016-05-09 | 2016-08-31 | 中国地震局工程力学研究所 | Bridge beam body deformation sensing system and sensor |
| CN111189427A (en) * | 2020-02-13 | 2020-05-22 | 桂林理工大学 | Real-time monitoring method for bending deformation of simply supported beam |
-
2016
- 2016-05-09 CN CN201620411033.XU patent/CN205808651U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105910779A (en) * | 2016-05-09 | 2016-08-31 | 中国地震局工程力学研究所 | Bridge beam body deformation sensing system and sensor |
| CN105910779B (en) * | 2016-05-09 | 2018-09-28 | 中国地震局工程力学研究所 | A kind of bridge beam body deformation sensor-based system and sensor |
| CN111189427A (en) * | 2020-02-13 | 2020-05-22 | 桂林理工大学 | Real-time monitoring method for bending deformation of simply supported beam |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105910779B (en) | A kind of bridge beam body deformation sensor-based system and sensor | |
| CN204439036U (en) | The measurement mechanism at vehicle side inclination angle | |
| CN205808651U (en) | A kind of bridge beam body deformation sensor-based system and sensor | |
| CN209393752U (en) | A kind of leaf spring radian testing, sorting device | |
| CN104568092A (en) | Multi-functional comprehensive rail weighbridge | |
| CN110979336A (en) | Real-time monitoring system for running attitude of vehicle body | |
| CN109373876B (en) | Road surface flatness detection device | |
| CN202013230U (en) | Railpad type pitless uninterrupted rail weighbridge | |
| CN201852579U (en) | Pointer type gradient gauge | |
| CN101650219B (en) | Inside sphere type vector vibration transducer | |
| CN209395817U (en) | A kind of vacuum tube magnetic-levitation train T-slot rail gauge and superelevation measure detection device | |
| CN202938849U (en) | Testing instrument for synchronously testing polished rod load and reducer casing torque of pumping unit | |
| CN107152930B (en) | A kind of magnetic suspending train frame pose measuring method | |
| CN102393540A (en) | Magnetic suspension rainfall intensity recorder | |
| CN205002765U (en) | Curved measuring device of rotary kiln | |
| CN202092754U (en) | Plate type weighing system for locomotive wheel weight | |
| CN203299007U (en) | Calibration tool for car suspension system | |
| CN207163697U (en) | A kind of vibrating speed sensors | |
| CN109444462B (en) | Accelerometer based on vibration equipment | |
| CN104652189A (en) | Novel controlling system of high-speed rail track measuring apparatus | |
| CN203163678U (en) | Device for six-degree-of-freedom measurement of platform | |
| CN206161188U (en) | Dark accuracy of measurement of deserted temperature based on optic fibre FP sensor | |
| CN202692916U (en) | Pendulum supporting rod for calibrating feet of dummy | |
| CN205898839U (en) | A acceleration sensor device for high -speed railway vehicle | |
| CN201326144Y (en) | Electric gauging rule |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161214 Termination date: 20180509 |