CN204224119U - Crane load detecting device - Google Patents
Crane load detecting device Download PDFInfo
- Publication number
- CN204224119U CN204224119U CN201420611489.1U CN201420611489U CN204224119U CN 204224119 U CN204224119 U CN 204224119U CN 201420611489 U CN201420611489 U CN 201420611489U CN 204224119 U CN204224119 U CN 204224119U
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- module
- panel computer
- natural frequency
- steel rope
- zigbee wireless
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- 238000011068 load Methods 0.000 title claims abstract description 13
- 239000002965 rope Substances 0.000 claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 238000005259 measurement Methods 0.000 claims abstract description 17
- 230000001133 acceleration Effects 0.000 claims description 6
- 235000019800 disodium phosphate Nutrition 0.000 claims description 5
- 206010033307 Overweight Diseases 0.000 claims description 2
- 235000020825 overweight Nutrition 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000007689 inspection Methods 0.000 abstract description 2
- 238000007906 compression Methods 0.000 description 2
- 230000003028 elevating Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
Abstract
A kind of crane load detecting device, comprises reel (1), fixed pulley (2), steel rope (3), natural frequency of vibration measurement module (4), Zigbee wireless receiving module (5), industrial panel computer (6) and absolute type encoder (7).Described absolute type encoder (7) is arranged on the axle head of crane hoisting mechanism reel (1); Natural frequency of vibration measurement module (4) is cemented on steel rope (3), does not change the force structure of steel rope (3); Natural frequency of vibration measurement module (4) is connected by Zigbee WLAN with Zigbee wireless receiving module (5); Zigbee wireless receiving module (5) is communicated by serial ports with industrial panel computer (6); Industrial panel computer (6) is communicated by the mode of Modbus bus with absolute type encoder (7).The beneficial effects of the utility model are: method of inspection is simple, precision is high, and detecting device installation, handling, O&M are conveniently.
Description
Technical field
The present invention relates to crane safety monitoring field, especially a kind of crane load detecting device.
Background technology
In order to realize the real-time monitoring to crane safety, preventing crane loading goods from exceeding the specified hoisting capacity of hoisting crane, needing to carry out Real-Time Monitoring, record to crane load.When lifting cargo exceedes rated load weight, give the alarm, and send restricting signal to lifting limiter, finally also need to carry out record to event alarms reason.
Existing technology is all by adopting side-compression hoisting machine elevating capacity checking device, axial pin type sensor.But there is following problem: be all that sensor or steel rope are all easy to wear by contacting with steel rope extrusion friction during (1) side-compression hoisting machine elevating capacity checking device, axial pin type sensor measurement hoisting capacity; (2) because steel rope passes through between support pulley and dynamometry pulley, change force structure, therefore no matter steel rope is with or without dead end, measuring mechanism handling are all not very convenient.
Summary of the invention
Technical matters to be solved by this invention is, a kind of crane load detecting device is provided, when not changing crane hoisting mechanism wire rope force structure, online automatic detection crane load, for the safe handling of hoisting crane and maintenance provide failure-free foundation.
For solving the problems of the technologies described above, the invention provides a kind of crane load detecting device, comprising reel 1, fixed pulley 2, steel rope 3, natural frequency of vibration measurement module 4, Zigbee wireless receiving module 5, industrial panel computer 6 and absolute type encoder 7.Described absolute type encoder 7 is arranged on the axle head of crane hoisting mechanism reel 1; Natural frequency of vibration measurement module 4 is cemented on steel rope 3, does not change the force structure of steel rope 3; Natural frequency of vibration measurement module 4 is connected by Zigbee WLAN with Zigbee wireless receiving module 5; Zigbee wireless receiving module 5 is communicated by serial ports with industrial panel computer 6; Industrial panel computer 6 communicates with the mode of absolute type encoder 7 by Modbus bus.
Preferably, natural frequency of vibration measurement module 4 comprises acceleration pick-up 41, DSP digital signal processing module 42, Zigbee wireless sending module 43 and power module 44.
Preferably, the data that industrial panel computer 6 detects according to device parameter and sensor calculate, show and store real-time hoisting capacity, and can send overweight alarm.
Beneficial effect of the present invention is: method of inspection is simple, precision is high, and detecting device installation, handling, O&M are conveniently.
Accompanying drawing explanation
Fig. 1 is integral structure schematic diagram of the present invention.
Fig. 2 is absolute type encoder scheme of installation of the present invention.
Fig. 3 is the cut-away view of natural frequency of vibration measurement module of the present invention.
Detailed description of the invention
As shown in Figure 1, a kind of crane load detecting device, comprises reel 1, fixed pulley 2, steel rope 3, natural frequency of vibration measurement module 4, Zigbee wireless receiving module 5, industrial panel computer 6 and absolute type encoder 7.Described absolute type encoder 7 is arranged on the axle head of crane hoisting mechanism reel 1; Natural frequency of vibration measurement module 4 is cemented on steel rope 3, does not change the force structure of steel rope 3; Natural frequency of vibration measurement module 4 is connected by Zigbee WLAN with Zigbee wireless receiving module 5; Zigbee wireless receiving module 5 is communicated by serial ports with industrial panel computer 6; Industrial panel computer 6 communicates with the mode of absolute type encoder 7 by Modbus bus.
As shown in Figure 3, natural frequency of vibration measurement module 4 comprises acceleration pick-up 41, DSP digital signal processing module 42, Zigbee wireless sending module 43 and power module 44.
During work, absolute type encoder 7 detects the absolute angle that reel 1 turns over, and measures the length L of steel rope 3, and sends industrial panel computer 6 to the signalling methods of Modbus bus.Meanwhile, acceleration pick-up 41 detect vibration signal by Fluctuation Method and signal is amplified, A/D is converted to digital signal; Each rank natural frequency of vibration f that the digital signal that DSP digital signal processing module 42 pairs of acceleration pick-ups 41 collect carries out denoising, spectral analysis records steel rope 3
n, and data are passed to Zigbee wireless receiving module 5, Zigbee wireless receiving module 5 via Zigbee wireless sending module 43 communicated by serial ports with industrial panel computer 6, data are sent to industrial panel computer 6.Power module 44 is acceleration pick-up 41, DSP digital signal processing module 42 and Zigbee wireless sending module provide power supply.By artificially inputting, steel rope linear density ρ and coefficient of correction β is set, in conjunction with the natural frequency of vibration f that Real-time Collection arrives
nwith steel rope 3 actual length L, calculated the hoisting capacity Q of hoisting crane by frequency-difference method, and display in real time and storage.In addition, industrial panel computer 6 is automatically by the biggest lifting capacity Q of the real-time hoisting capacity Q that detects and hoisting crane
maxcompare, judge whether overload, the signal if overload industrial panel computer 6 gives the alarm, store alarms event.The computing formula of crane load is as follows:
Although the present invention illustrates with regard to preferred implementation and describes, only it will be understood by those of skill in the art that otherwise exceed claim limited range of the present invention, variations and modifications can be carried out to the present invention.
Claims (3)
1. a crane load detecting device, comprises reel (1), fixed pulley (2), steel rope (3), natural frequency of vibration measurement module (4), Zigbee wireless receiving module (5), industrial panel computer (6) and absolute type encoder (7); Described absolute type encoder (7) is arranged on the axle head of crane hoisting mechanism reel (1); Natural frequency of vibration measurement module (4) is cemented on steel rope (3), does not change the force structure of steel rope (3); Natural frequency of vibration measurement module (4) is connected by Zigbee WLAN with Zigbee wireless receiving module (5); Zigbee wireless receiving module (5) is communicated by serial ports with industrial panel computer (6); Industrial panel computer (6) is communicated by the mode of Modbus bus with absolute type encoder (7).
2. device as claimed in claim 1, is characterized in that: natural frequency of vibration measurement module (4) comprises acceleration pick-up (41), DSP digital signal processing module (42), Zigbee wireless sending module (43) and power module (44).
3. device as claimed in claim 1, is characterized in that: the data that industrial panel computer (6) detects according to device parameter and sensor calculate, show and store real-time hoisting capacity, and can send overweight alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420611489.1U CN204224119U (en) | 2014-10-21 | 2014-10-21 | Crane load detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420611489.1U CN204224119U (en) | 2014-10-21 | 2014-10-21 | Crane load detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204224119U true CN204224119U (en) | 2015-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420611489.1U Active CN204224119U (en) | 2014-10-21 | 2014-10-21 | Crane load detecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204224119U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105417370A (en) * | 2015-12-25 | 2016-03-23 | 哈尔滨工业大学 | Multichannel constant-force intelligent controller based on DSP (Digital Signal Processor) |
-
2014
- 2014-10-21 CN CN201420611489.1U patent/CN204224119U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105417370A (en) * | 2015-12-25 | 2016-03-23 | 哈尔滨工业大学 | Multichannel constant-force intelligent controller based on DSP (Digital Signal Processor) |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |