CN108675137A - Bridge crane panning angle measuring device based on slide rheostat and measurement method - Google Patents
Bridge crane panning angle measuring device based on slide rheostat and measurement method Download PDFInfo
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/16—Applications of indicating, registering, or weighing devices
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Abstract
A kind of bridge crane panning angle measuring device and measurement method based on slide rheostat, at least two swing angle detection devices are arranged on trolley driving mechanism, it is contacted respectively with the lifting rope of suspender, for measuring the increased resistance value because caused by being swung lifting rope, the one-to-one electric connection swing angle detection device of at least two signal processing apparatus, analog signal for exporting swing angle detection device amplifies shaping and is converted to digital signal, pivot angle composite calulation electromechanics connection signal processing unit, for to the digital signal that signal processing apparatus exports carrying out that pivot angle information is calculated according to the size of increased resistance value.The configuration of the present invention is simple, detection accuracy is high, and service life is long, cheap, strong interference immunity.
Description
Technical field
The present invention relates to a kind of bridge crane panning angle measuring device and measurement method based on slide rheostat.
Background technology
Two-electron atom overhead crane is a kind of novel harbour container place lifting equipment, it has there are two raising suspender,
The container that two 40 feet or four 20 feet can once be sling, compared with traditional single appliance bridge crane, substantially
The efficiency of loading and unloading for improving container of degree, but due to complicated, the work of the double hoisting dual-hanger bridge cranes of this large span
Mode is various and there are couplings, and the movement for adding trolley in actual environment there is wind-force can make lifting rope generation shake
Pendulum, this brings prodigious difficulty to the detection of suspender pivot angle.
One of the critical issue of crane anti-swing control is exactly the detection to pivot angle, and existing bridge crane swing angle detection device is big
It is all directed to single appliance bridge crane to design, these detection devices can substantially be divided into contact and non-contact measurement.Existing one kind
Contact swing angle detection device is to drive a code-disc rotation with lightweight rocker, and such measurement method accuracy is not high, shadow
The effect measured is rung, and detecting element is easy to wear, it is inconvenient to safeguard.Contactless swing angle detection device is often used laser angle
Instrument, this quasi-instrument angle is higher to operating environment requirements, expensive.Meanwhile existing overhead crane operator is often through meat
Eye observation suspender and load swing situation to obtain it, and accuracy is low and there are security risks, influences working efficiency and as received basis
Amount.
Existing bridge crane swing angle detection device from structure, functionally from the point of view of, it is and big both for the design of single appliance bridge crane
More list appliance bridge crane swing angle detection devices are not suitable for solving the pivot angle test problems of two-electron atom bridge crane.
Invention content
The present invention provides a kind of bridge crane panning angle measuring device and measurement method based on slide rheostat, simple in structure, inspection
It is high to survey accuracy, service life is long, cheap, strong interference immunity.
In order to achieve the above object, the present invention provides a kind of bridge crane panning angle measuring device based on slide rheostat, including：
At least two swing angle detection devices are arranged on trolley driving mechanism, contact, be used for the lifting rope of suspender respectively
Measurement increased resistance value because caused by being swung lifting rope；
At least two signal processing apparatus, one-to-one electric connection swing angle detection device are filled for detecting pivot angle
It sets the analog signal amplification shaping of output and is converted to digital signal；
Pivot angle composite calulation machine is electrically connected signal processing apparatus, is used for the size according to increased resistance value to signal
The digital signal of processing unit output carries out that pivot angle information is calculated.
The swing angle detection device includes：
Lightweight rocker, the side of the lightweight rocker are the conductive side that conductive material is formed, and the other side is formed for insulating materials
Insulation sides, between conductive side and insulation sides be arranged a rectangular conductor, lifting rope pass through rectangular conductor in through-hole, rectangular conductor
It can be slided between conductive side and insulation sides, insulation one end of the lightweight rocker connects the lightweight pointer formed by conductive material,
Lightweight pointer and semicircle Ohmic contact；
The conductive side and insulation sides of rectangular conductor and lightweight rocker form the first slide rheostat and are hung when lifting rope moves
Rope band moves rectangular conductor and is slided in lightweight rocker, and the resistance value of the first slide rheostat generates variation；
Lightweight pointer forms the second slide rheostat with semicircle resistance, and the rotation of lightweight rocker drives turning for conductive pointer
Dynamic, the movement on semicircle resistance of conductive pointer causes the variation of the resistance value of the second slide rheostat.
The swing angle detection device also includes：Confinement tube is set on lifting rope so that the deflection angle measurement of lifting rope is from about
The minimum point of beam tube starts to measure, so that the angular range measured is
The bridge crane panning angle measuring method based on slide rheostat that the present invention also provides a kind of, comprises the steps of：
Step S1, swing angle detection device detects the resistance change caused by the lifting rope swing of corresponding suspender, will
Increased resistance value is sent to signal processing apparatus；
Step S2, the analog signal that swing angle detection device exports is amplified shaping and is converted to digital letter by signal processing apparatus
Number；
Step S3, the digital signal that pivot angle composite calulation machine exports signal processing apparatus according to the size of increased resistance value
It carries out that pivot angle information is calculated.
In the step S1, the method for detection resistance changing value includes：
Swing of the lifting rope on being parallel to lightweight rocker direction drives rectangular conductor to be slided in lightweight rocker, causes second
The resistance value of slide rheostat changes；
Lifting rope causes lightweight rocker to rotate in the swing on lightweight rocker direction, lightweight rocker rotation band moving conductive
Indicators turn, the movement on semicircle resistance of conductive pointer cause the resistance value of the first slide rheostat to change；
The increased resistance value of the first slide rheostat and the second slide rheostat is obtained in real time.
In the step S3, include according to the method that increased resistance value calculates pivot angle：
Step S3.1, the pivot angle θ being parallel on lightweight rocker direction is calculated separatelyyWith on lightweight rocker direction
Pivot angle θx；
Wherein, Δ R is increased resistance value, and k is permanent number, rxFor the radius of semicircle resistance, ryIt is the half of lightweight rocker
Diameter；
Step S3.2, synthesis pivot angle component obtains pivot angle value θ；
The present invention uses advanced electronics technology, can apply in most evil bad industrial environment, be not easy the shadow by external condition
It rings, therefore improves the reliability of detection and the service life of device；Sensitive material is non-contact, constantly repeats during detecting
Any mechanical wear will not be caused to it；And be to detect in real time, with environmental suitability is strong, service using life is long, detection
The advantages that precision is high.Solve detection, the pivot angle information processing in double elevator double-sling bridge type crane swing angles direction and size
And display problem.Two-electron atom overhead crane uses swing angle detection device, and obtained electric signal is hung by handling and being calculated
The swing angle and swaying direction problem of rope, these data can be as the feedback informations of crane anti-swing system, can also be intuitive
Go out the display screen to operating room, is referred to as running to driver.The present invention not only can provide pendulum for the operation of bridge crane operator
Angle reference information can also provide accurate feedback information for the anti-location control of shaking of single suspender and two-electron atom bridge crane.With the present invention
Based on, it can be generalized to the anti-of more suspenders and shake work.
Description of the drawings
Fig. 1 is the integral installation structural schematic diagram of the bridge crane panning angle measuring device based on slide rheostat.
Fig. 2 is the structural schematic diagram of swing angle detection device.
Fig. 3 is the partial top view of lightweight rocker.
Fig. 4 is the partial schematic diagram of lightweight pointer and semicircle resistance.
Fig. 5 is the flow chart of the bridge crane panning angle measuring method based on slide rheostat.
Fig. 6 is bridge crane pivot angle composite diagram.
Specific implementation mode
Below according to Fig. 1~Fig. 6, presently preferred embodiments of the present invention is illustrated.
As shown in Figure 1, by taking two-electron atom bridge crane as an example, cart driving mechanism 4 drives bridge crane cart 3 to move, bridge crane trolley machine
Structure 1 is arranged on bridge crane cart 3, and trolley driving mechanism 2 drives bridge crane trolley body 1 to move, and bridge crane cockpit 10 is arranged in bridge
It hangs on cart 3, suspender hoisting motor 5 is arranged in bridge crane trolley mechanism 1, is responsible for the elevating movement of suspender and load, first hangs
Tool 7 and the second suspender 8 connect the machine shaft 15 (as shown in Figure 2) of suspender hoisting motor 5 by lifting rope 12 respectively, for lifting by crane
Container, the two suspenders can interlock work, can also work independently.
As shown in Figure 1, the present invention provides a kind of bridge crane panning angle measuring device based on slide rheostat, including：
Two swing angle detection devices 11, be arranged on trolley driving mechanism 2, respectively with the first suspender 7 and the second suspender 8
Lifting rope 12 contact, for measure because lifting rope swing caused by increased resistance value；
Two signal processing apparatus 13, are electrically connected swing angle detection device 11, are used for swing angle detection device 11
The analog signal amplification shaping of output is simultaneously converted to digital signal；
Pivot angle composite calulation machine 9 is electrically connected signal processing apparatus 13, is used for the size according to increased resistance value to letter
The digital signal that number processing unit 13 exports carries out that pivot angle information is calculated.
As shown in Fig. 2, the swing angle detection device 11 includes：
Lightweight rocker 16, the side of the lightweight rocker 16 are the conductive side 19 that conductive material is formed, and the other side is insulation material
Expect the insulation sides 20 formed, a rectangular conductor 21 is set between conductive side 19 and insulation sides 20, lifting rope 12 passes through rectangular conductor
Through-hole in 21, rectangular conductor 21 can slide between conductive side 19 and insulation sides 20, and insulation one end of the lightweight rocker 16 connects
The lightweight pointer 17 formed by conductive material is connect, lightweight pointer 17 is contacted with semicircle resistance 18.
As shown in figure 3, conductive side 19 and insulation sides 20 composition the first sliding variable resistance of rectangular conductor 21 and lightweight rocker 16
Device, when lifting rope 12 moves, lifting rope 12 drives rectangular conductor 21 to be slided in lightweight rocker 16, and detection first slides variable resistance at this time
The variation of the resistance value of device, sending the changing value of resistance to pivot angle composite calulation machine 9 by signal processing apparatus 13 can obtain
To the size of real-time 16 swing angle of detection lightweight rocker.
As shown in figure 4, lightweight pointer 17 forms the second slide rheostat, the rotation of lightweight rocker 16 with semicircle resistance 18
The rotation of conductive pointer 17, the mobile resistance for causing the second slide rheostat on semicircle resistance 18 of conductive pointer 17 can be driven
The variation of value detects the variation of the resistance value of the second slide rheostat at this time, the changing value of resistance is passed through signal processing apparatus
13, which send pivot angle composite calulation machine 9 to, can obtain detecting the size of 16 swing angle of lightweight rocker in real time.
As shown in Fig. 2, suspender hoisting motor 5 drives suspender hoisting motor shaft 15 to rotate, make to be connected to machine shaft 15
On lifting rope 12 carry out folding and unfolding, and then realize load or suspender lifting.Confinement tube 22 is set on lifting rope 12 so that lifting rope
Deflection angle measurement is measured since the minimum point of confinement tube 22, so that the angular range of measurement is
The signal processing apparatus 13 includes the components such as CPU, memory, signal processing circuit and I/O interfaces, wherein
CPU is connect with memory and signal processing circuit, and I/O interface circuits are connect with signal processing circuit, and signal processing circuit can be with
Handle two paths of signals simultaneously.Two-way corresponding with x, the y-coordinate axis letter that signal processing apparatus 13 sends swing angle detection device 11
It number carries out preposition amplification, shaping filter and A/D conversions respectively (as one group of signal), gives the digital signal being converted to pendulum
Angle composite calulation machine 9 is further analyzed processing.In the present embodiment, signal processing apparatus 13 can handle two groups of letters simultaneously
Number.
The pivot angle composite calulation machine 9 receives the number transmitted with the corresponding signal processing apparatus of two suspenders 13
Signal, and corresponding processing measuring and calculating is carried out to signal according to the variation size of resistance value, it is final to obtain pivot angle information.First suspender
7 and 8 respective pivot angle information of the second suspender different serial communication interfaces is respectively adopted by signal processing apparatus 13 and is linked into pendulum
Angle composite calulation machine 9, pivot angle composite calulation machine 9 judge calculated pivot angle information according to the serial ports difference of signal input signal
From which suspender, gained pivot angle information is transmitted to the bridge crane display in driver's cabin 10, is carried for the operation of bridge crane driver
For reference, crane anti-swing/isochronous controller can also be fed back to as control reference information.
The present invention can promote the use of more appliance bridge cranes, it is only necessary to according to the quantity Matching swing angle detection device 11 of suspender
With signal processing apparatus 13, ensure that each suspender matches a swing angle detection device 11 and signal processing apparatus 13.
As shown in figure 5, the present invention also provides a kind of bridge crane panning angle measuring method based on slide rheostat, including following step
Suddenly：
Step S1, swing angle detection device detects the resistance change caused by the lifting rope swing of corresponding suspender, will
Increased resistance value is sent to signal processing apparatus；
Step S2, the analog signal that swing angle detection device exports is amplified shaping and is converted to digital letter by signal processing apparatus
Number；
Step S3, the digital signal that pivot angle composite calulation machine exports signal processing apparatus according to the size of increased resistance value
It carries out that pivot angle information is calculated.
In the step S1, the method for the detection resistance changing value includes：
Swing of the lifting rope on being parallel to lightweight rocker direction drives rectangular conductor to be slided in lightweight rocker, causes second
The resistance value of slide rheostat changes；
Lifting rope causes lightweight rocker to rotate in the swing on lightweight rocker direction, lightweight rocker rotation band moving conductive
Indicators turn, the movement on semicircle resistance of conductive pointer cause the resistance value of the first slide rheostat to change；
The increased resistance value of the first slide rheostat and the second slide rheostat is obtained in real time.
In the step S3, include according to the method that increased resistance value calculates pivot angle：
Step S3.1, the pivot angle θ being parallel on lightweight rocker direction is calculated separatelyyWith on lightweight rocker direction
Pivot angle θx；
Wherein, Δ R is increased resistance value, and k is permanent number, rxFor the radius of semicircle resistance, ryIt is the half of lightweight rocker
Diameter；
Step S3.2, synthesis pivot angle component obtains pivot angle value θ；
In an embodiment of the present invention, by taking two-electron atom bridge crane as an example, the bridge crane panning angle measuring method based on slide rheostat
Specific work process is as follows：
1, it when installing swing angle detection device 11, needs to carry out initial position message setting to all parts, as first
Beginning reference position, setting process are as follows：In the case where bridge crane trolley mechanism 1 not yet moves, the first suspender 7 of two-electron atom bridge crane
It is naturally drooped with the second suspender 8, lifting rope 12 receives two groups of pivot angle detections without any pivot angle, at this time signal processing apparatus 13 at this time
The initial reference value that the resistance value that device 11 transmits is calculated as pivot angle, pivot angle at this time is 0.
2, driver's cabin 10 sends out operating instruction to two-electron atom bridge crane, and bridge crane controls the first suspender 7 according to different operating instructions
With the operation of the second suspender 8, since the movement of bridge crane trolley mechanism 1 drives respective lifting rope 12 to swing.
3, as shown in Fig. 2, when lifting rope is when y-axis direction is swung, lifting rope is swung from original vertical position to y positive directions
When, lifting rope 12 drives rectangular conductor 21 to move (lightweight rocker 16 remains stationary as at this time) to positive direction of the y-axis, signal processing at this time
The resistance value that device 13 obtains reduces；Similarly, when lifting rope 12 is swung to y negative directions, rectangular conductor 21 is led toward negative direction of the y-axis movement
The resistance value that signal processing apparatus 13 obtains is caused to become larger.The variation of resistance value is by being calculated corresponding angle change and swing
Direction, and then the pivot angle value of y-axis axial direction is calculated.
When lifting rope is when x-axis direction is swung, when lifting rope is swung from original vertical position to positive direction of the x-axis, lifting rope drives y
Axial lightweight rocker 16 swings (rectangular conductor 21 remains stationary as at this time) to positive direction of the x-axis, and the swing of rocker drives conductive finger
Needle 17 is swung, and then resistance value is caused to become smaller；Similarly, when lifting rope is swung to x negative directions, y lightweights rocker is driven to be put to x negative directions
It is dynamic, cause resistance value to increase.The variation of resistance value is calculated by corresponding angle change and swaying direction is calculated
Go out the pivot angle value of x-axis axial direction.
When lifting rope is swung in any direction, the swing of lifting rope can drive lightweight rocker 16 to generate swing and be led with rectangular simultaneously
The movement of body 21 obtains the variation of opposite resistance value, obtains the angle and direction of lifting rope 12 in all directions, by x-axis, y
The axial respective direction of motion is synthesized the direction of motion as suspender pivot angle, by the pivot angle value in x-axis, y-axis respectively component
Synthesized the pivot angle value as suspender.
While driver's cabin 10 sends out bridge crane operating instruction, the reception of signal processing apparatus 13 is sent by swing angle detection device 11
Two-way lifting rope swing signal, by signal by amplification, A/D conversion after pass through serial ports of computers be sent into pivot angle composite calulation machine
9 processing carry out calculating position and the size that can detect pivot angle in real time by pivot angle composite calulation machine 9.
According to formulaIt learns, resistance sizes are related with the length of resistance, and linear, and then are reduced to R
=k Δ R release the relationship of the variation and angle of resistance value below：
Δ l=k Δs R
Δ l=θ r
Wherein, Δ R is increased resistance value, and k is proportionality constant, and Δ l is sliding distance, and θ is the angle of lightweight pivot angle rotation,
R is radius.
17 rotational angle of conductive pointer is identical as the rotational angle of lightweight rocker 16, by the way that 16 turns of lightweight rocker is calculated
Dynamic angleΔ R is increased resistance value, and k is permanent number, rxFor the radius of semicircle resistance 18, as Δ R ＞ 0,
The negative direction of lifting rope 12 toward x-axis moves, and as Δ R ＜ 0, lifting rope is moved toward positive direction of the x-axis；Rectangular conductor 21 is in lightweight rocker 16
Upper movement, according toIt is calculated in 12 swing angle of lifting rope of y-axis and direction, Δ R is increased resistance value, and k is fixed
Constant, ryFor the radius of lightweight rocker, as Δ R ＞ 0, the negative direction of lifting rope 12 toward y-axis moves, and as Δ R ＜ 0, lifting rope is toward y
Axis positive direction moves.
As shown in figure 5, synthesis pivot angle component θx、θyObtain pivot angle value θ；
By formulaIt can be calculated pivot angle value.
4, the work of another group of suspender is consistent with the above, after the information for obtaining this group of pivot angle, by two groups of suspender pivot angle
Information sends to and is referred to for bridge crane driver on the display of driver's cabin 10, or is sent into as feedback information and prevents shaking/synchronizing control
In device processed.
In the actual condition of double hoisting dual-hanger bridge cranes, the first suspender 7 and the second suspender 8 can work independently from each other
Interlocking synchronous working.In independent working mode, two suspenders are independent of each other, and respectively obtain two angle values；In interlocking work
When pattern, the first suspender 7 of 9 calculation processing of pivot angle composite calulation machine and the pivot angle value of the second suspender 8 theoretically should be identical, such as
Fruit is different, can similarities and differences signal be carried out respective handling by pivot angle composite calulation machine 9 again, make two-way pivot angle value mutually to shining into
Row is corrected, to ensure better synchronous effect.
The present invention uses advanced electronics technology, can apply in most evil bad industrial environment, be not easy the shadow by external condition
It rings, therefore improves the reliability of detection and the service life of device；Sensitive material is non-contact, constantly repeats during detecting
Any mechanical wear will not be caused to it；And be to detect in real time, with environmental suitability is strong, service using life is long, detection
The advantages that precision is high.Solve detection, the pivot angle information processing in double elevator double-sling bridge type crane swing angles direction and size
And display problem.Two-electron atom overhead crane uses swing angle detection device, and obtained electric signal is hung by handling and being calculated
The swing angle and swaying direction problem of rope, these data can be as the feedback informations of crane anti-swing system, can also be intuitive
Go out the display screen to operating room, is referred to as running to driver.The present invention not only can provide pendulum for the operation of bridge crane operator
Angle reference information can also provide accurate feedback information for the anti-location control of shaking of single suspender and two-electron atom bridge crane.With the present invention
Based on, it can be generalized to the anti-of more suspenders and shake work.
Although present disclosure is discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (6)
1. a kind of bridge crane panning angle measuring device based on slide rheostat, which is characterized in that include：
At least two swing angle detection devices (11) are arranged on trolley driving mechanism (2), are connect respectively with the lifting rope of suspender (12)
It touches, for measuring the increased resistance value because caused by being swung lifting rope；
At least two signal processing apparatus (13), one-to-one electric connection swing angle detection device (11), for examining pivot angle
It surveys the analog signal amplification shaping that device (11) exports and is converted to digital signal；
Pivot angle composite calulation machine (9) is electrically connected signal processing apparatus (13), is used for the size according to increased resistance value to letter
The digital signal of number processing unit (13) output carries out that pivot angle information is calculated.
2. the bridge crane panning angle measuring device based on slide rheostat as described in claim 1, which is characterized in that the pivot angle
Detection device (11) includes：
Lightweight rocker (16), the side of the lightweight rocker (16) are the conductive side (19) that conductive material is formed, and the other side is insulation
A rectangular conductor (21), lifting rope (12) is arranged in the insulation sides (20) that material is formed between conductive side (19) and insulation sides (20)
Through-hole in rectangular conductor (21), rectangular conductor (21) can be slided between conductive side (19) and insulation sides (20), this is light
Insulation one end of matter rocker (16) connects the lightweight pointer (17) formed by conductive material, lightweight pointer (17) and semicircle resistance
(18) it contacts；
Conductive side (19) and insulation sides (20) the first slide rheostat of composition of rectangular conductor (21) and lightweight rocker (16), when hanging
When rope (12) is mobile, lifting rope (12) drives rectangular conductor (21) sliding, electricity of the first slide rheostat in lightweight rocker (16)
Resistance value generates variation；
Lightweight pointer (17) forms the second slide rheostat, the rotation band moving conductive of lightweight rocker (16) with semicircle resistance (18)
The rotation of pointer (17), the movement on semicircle resistance (18) of conductive pointer (17) cause the resistance value of the second slide rheostat
Variation.
3. the bridge crane panning angle measuring device based on slide rheostat as claimed in claim 3, which is characterized in that the pivot angle
Detection device (11) also includes：Confinement tube (22) is set on lifting rope (12) so that the deflection angle measurement of lifting rope is from confinement tube
(22) minimum point starts to measure, so that the angular range measured is
4. a kind of measurement method of the bridge crane panning angle measuring device based on slide rheostat as claimed in claim 3, feature
It is, comprises the steps of：
Step S1, swing angle detection device detects the resistance change caused by the lifting rope swing of corresponding suspender, by resistance
Changing value is sent to signal processing apparatus；
Step S2, the analog signal that swing angle detection device exports is amplified shaping and is converted to digital signal by signal processing apparatus；
Step S3, pivot angle composite calulation machine carries out the digital signal that signal processing apparatus exports according to the size of increased resistance value
Pivot angle information is calculated.
5. the bridge crane panning angle measuring method based on slide rheostat as claimed in claim 4, which is characterized in that the step
In S1, the method for detection resistance changing value includes：
Swing of the lifting rope on being parallel to lightweight rocker direction drives rectangular conductor to be slided in lightweight rocker, causes the second sliding
Rheostatic resistance value changes；
Lifting rope causes lightweight rocker to rotate in the swing on lightweight rocker direction, and the rotation of lightweight rocker drives conductive pointer
Rotation, the movement on semicircle resistance of conductive pointer cause the resistance value of the first slide rheostat to change；
The increased resistance value of the first slide rheostat and the second slide rheostat is obtained in real time.
6. the bridge crane panning angle measuring method based on slide rheostat as claimed in claim 5, which is characterized in that the step
In S3, include according to the method that increased resistance value calculates pivot angle：
Step S3.1, the pivot angle θ being parallel on lightweight rocker direction is calculated separatelyyWith the pivot angle on lightweight rocker direction
θx；
Wherein, Δ R is increased resistance value, and k is permanent number, rxFor the radius of semicircle resistance, ryFor the radius of lightweight rocker；
Step S3.2, synthesis pivot angle component obtains pivot angle value θ；
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| CN201810596057.0A CN108675137B (en) | 2018-06-11 | 2018-06-11 | Bridge crane swing angle measuring device and method based on slide rheostat |
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| CN201810596057.0A CN108675137B (en) | 2018-06-11 | 2018-06-11 | Bridge crane swing angle measuring device and method based on slide rheostat |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579053A (en) * | 2020-06-03 | 2020-08-25 | 赵晓勇 | Bridge swing detection early warning device based on cloud computing |
| CN113086853A (en) * | 2021-04-09 | 2021-07-09 | 上海海事大学 | Bridge crane synchronization and swing angle detection device and detection method |
| CN113738282A (en) * | 2021-08-02 | 2021-12-03 | 中铁隧道局集团有限公司 | Ultra-long horizontal omnibearing high-pressure jet construction method pile |
| CN114911275A (en) * | 2022-07-13 | 2022-08-16 | 天津光电集团有限公司 | Leveling detection device and working method thereof |
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| CN111579053A (en) * | 2020-06-03 | 2020-08-25 | 赵晓勇 | Bridge swing detection early warning device based on cloud computing |
| CN113086853A (en) * | 2021-04-09 | 2021-07-09 | 上海海事大学 | Bridge crane synchronization and swing angle detection device and detection method |
| CN113086853B (en) * | 2021-04-09 | 2023-05-30 | 上海海事大学 | Bridge crane synchronization and swing angle detection device and detection method |
| CN113738282A (en) * | 2021-08-02 | 2021-12-03 | 中铁隧道局集团有限公司 | Ultra-long horizontal omnibearing high-pressure jet construction method pile |
| CN113738282B (en) * | 2021-08-02 | 2024-07-30 | 中铁隧道局集团有限公司 | Super-long horizontal omnibearing high-pressure jet construction method pile |
| CN114911275A (en) * | 2022-07-13 | 2022-08-16 | 天津光电集团有限公司 | Leveling detection device and working method thereof |
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