CN205953363U - Thermal detector for tower crane transmission system - Google Patents
Thermal detector for tower crane transmission system Download PDFInfo
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- CN205953363U CN205953363U CN201620921659.5U CN201620921659U CN205953363U CN 205953363 U CN205953363 U CN 205953363U CN 201620921659 U CN201620921659 U CN 201620921659U CN 205953363 U CN205953363 U CN 205953363U
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- thermistor
- microcontroller
- thermal detector
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Abstract
The utility model relates to a tower crane, especially a thermal detector for tower crane transmission system, including setting up the thermistor on tower crane rotation motor or electromagnetic braking ware, thermistor is connected through the AD sampling module of plug connector with little the control unit, AD sampling module is connected with micro -controller input end, the microcontroller output is connected with alarm module and display module respectively, little the control unit still includes the button module, the button module is connected with micro -controller input end, the microcontroller output is connected with tower machine electronic control module through relay module. After the structure of the oil adding device is adopted, the utility model discloses can be used for monitoring electromagnetic braking ware or rotation motor's temperature, electromagnetic braking ware temperature judges whether go beyond the scope, all rotation motor temperature are made comparisons, have avoided entire system's damage.
Description
Technical field
The utility model is related to derrick crane, particularly a kind of derrick crane transmission system thermal detector.
Background technology
Derrick crane is the most frequently used a kind of crane gear on construction site, is mainly used in material in housing construction
Vertically and horizontally conveying and building element installation.The normal operation of brake ensure that derrick crane normally runs, certainly
Determine the safety work of derrick crane.Generally the brake on derrick crane has two kinds, is liquid braking device and electricity respectively
Magnetic brake.However, the derrick crane of a lot of manufacturer production all no detects to the ruuning situation of electromagnetic brake, may
Because the damage of brake causes serious security incident.
Generally, in the transmission system of the lifting mechanism of a lot of derrick cranes, slew gear, jib lubbing mechanism, all using electricity
Magnetic brake does brakes.Electromagnetic brake is generally made up of brake block, brake armature, restraining coil.When tower crane brake
During normal operation, electromagnetic brake temperature is slightly above atmospheric temperature.When tower crane braking circuit breaks down, motor is still normal
Operating, and brake cannot be opened.Now motor overcomes brake to run, and leads to brake temperature to raise rapidly.Generally, operate
Personnel cannot find fault the very first time, if not cutting off the input instruction of transmission system immediately, the temperature producing for several seconds will
Moment causes brake block to grind, brake armature barbecue deformation, and restraining coil insulation declines, and the impact to motor is also quite big.
Chinese utility model patent CN 204251219 U discloses a kind of derrick crane.Described derrick crane includes
Gantry body, terrestrial operation room and intelligence control system.Described intelligence control system includes the video monitoring being electrically connected to each other
Display, alarm, tower body controller, RFID tag, infrared integrated camera, infrared thermography, electronic weight sense
Answer device, radar controller and ultrasonic sensor, described video monitoring display and described alarm are located at described terrestrial operation
Room, described tower body controller, described RFID tag, described infrared integrated camera, described infrared thermography, described electricity
Sub- weight induction device, described radar controller and described ultrasonic sensor are all located at described gantry body.Although this is practical
The derrick crane of new offer is located at ground operating room, using intelligence control system, derrick crane is monitored, fall
The working strength of low operating personnel and danger, improve operating efficiency；But this utility model fails tower derrick crane is passed
Dynamic system carries out overall monitor.
Content of the invention
The utility model technical issues that need to address are to provide a kind of monitoring electromagnetic brake or turning motor work shape
The thermal detector of state.
For solving above-mentioned technical problem, derrick crane transmission system thermal detector of the present utility model, including setting
Put the thermistor on tower crane rotation motor or electromagnetic brake, described thermistor passes through plug connector and microcontroller
The A/D sampling module of unit is connected, and described A/D sampling module is connected with microcontroller input, and described microcontroller is defeated
Go out end to be connected with alarm module and display module respectively；Described micro-control unit also includes key-press module, described key-press module
It is connected with microcontroller input；Described microcontroller output is connected with tower crane electronic control module by relay module.
Further, described A/D sampling module includes Wheatstone bridge and amplifier, the input of described Wheatstone bridge
Be connected with thermistor, described Wheatstone bridge output end is connected with amplifier in, described amplifier out with
Low pass filter input is connected, and described first low pass filter output is connected with microcontroller input.
Further, described amplifier is integrated single supply instrument amplifier AD623.
Further, described low pass filter is second order Butterworth LPF.
Further, described alarm module includes buzzer and switch triode Q3, described buzzer two ends respectively with electricity
Source is connected with switch triode Q3 emitter stage, and described switch triode Q3 ground level is connected with microcontroller output, described
The grounded collector of switch triode Q3.
Further, described relay module includes relay K1 and optocoupler U11, and No. 1 pin of described optocoupler U11 passes through
Resistance R32 is connected with 3.3V power supply, and No. 2 pins of described optocoupler U11 are connected with microcontroller output；Described optocoupler
No. 3 pin ground connection of U11, No. 4 pins of described optocoupler U11 are connected with triode Q1 base stage by resistance R33, described optocoupler
No. 4 pins of U11 are connected with triode Q1 emitter stage by resistance R31, and described triode Q1 emitter stage is connected with 12V power supply
Connect and be connected；Described triode Q1 colelctor electrode is connected with No. 4 pins of relay K1, and No. 5 pins of described relay K1 connect
Ground；Reversal connection diode D2 between No. 4 pins of described relay K1 and No. 5 pins.
Further, described thermistor is arranged on tower crane rotation motor, described thermistor be two or
Two or more, each thermistor described is connected with microcontroller input separately through an A/D sampling module.
Further, described microcontroller output is connected with PLC by serial port module.
After said structure, the utility model can be used to monitor the temperature of electromagnetic brake or turning motor, electromagnetism
Brake temperature sees if fall out scope, all turning motor temperature are made comparisons, it is to avoid the damage of whole system.
Brief description
With reference to the accompanying drawings and detailed description the utility model is described in further detail.
Fig. 1 is the structured flowchart of the utility model derrick crane transmission system thermal detector.
Fig. 2 is the circuit theory diagrams of the utility model A/D sampling module.
Fig. 3 is the circuit theory diagrams of the utility model alarm module.
Fig. 4 is the circuit theory diagrams of the utility model relay module.
In figure：1 is thermistor, and 2 is plug connector, and 3 is micro-control unit, and 4 is tower crane electronic control module, and 5 is favour stone electricity
Bridge, 6 is second order Butterworth LPF, and 7 is PLC
301 is microcontroller, and 302 is A/D sampling module, and 303 is key-press module, and 304 is alarm module, and 305 is display
Module, 306 is relay module, and 307 is serial port module
Specific embodiment
As shown in figure 1, derrick crane transmission system thermal detector of the present utility model, including being arranged on tower lifting
Thermistor on machine turning motor or electromagnetic brake.Thermistor does not have mechanical loss, generally existing some tower of ratio
The brake for liquid braking device on heavy-duty machine confirms that switch performance is good.When for detecting electromagnetic brake, only
Use a passage it is simply that pass through the microcontroller 301 of A/D sampling module 302 and micro-control unit 3 using 1 thermistor
Input is connected.This circuit is used for the voltage signal that heat sensor collects of sampling, amplified, filter after deliver to microcontroller
Device 301.When tower crane braking circuit appearance exception transmission system continues to run with, electromagnetic brake temperature moment raises, temperature-sensitive
Resistance can sample the change of temperature, after temperature rises to the threshold values of setting, rapid cut-out transmission system input instruction, and keep away
Exempt from the deterioration of fault.In present embodiment, thermistor RL passes through plug connector 2 by three-wire system connection access circuit, because temperature-sensitive is electric
Resistance RL adopts gluing on the brake, and instantaneous temperature can be very high, is easily caused thermistor and damages, permissible by three-wire system connection
It is conveniently replaceable thermistor RL.
Extend the purposes of device, can be used to detect the quality of tower crane turning motor.When for detecting turning motor,
Using two or more thermistors, each thermistor is separately through an A/D sampling module 302 and microcontroller
301 inputs are connected.In present embodiment, hot testing circuit is three identical sampling channels, the output of three passages
It is connected on microcontroller pin.Generally, after tower crane turning motor has one to burn out, because other motor normal works, this electricity
Machine is operated by other motor drag, from the appearance, is difficult to find that this motor has damaged.After motor damage, the output of moment of torsion
All undertaken by other motors, quite big to the burden of other motors.After staff finds that tower crane can not operate, usual two
Platform motor all damages.Torque motor has the stall performance of itself.Generally, in the feelings of IGCT phase-shifting trigger controlled motor voltage
Under condition, the voltage of torque motor is disproportionate with frequency, motor rotation blockage run heating, heat can in tolerance range when, will not
Motor is caused damage.This circuit can gather the temperature value of several motors respectively, and temperature value is compared and calculates, such as
Really two motor temperature differences are larger, then need shutdown inspection, so can prevent hand inspection.
Described thermistor is connected with the A/D sampling module 302 of micro-control unit 3 by plug connector 2, and described A/D adopts
Egf block 302 is connected with microcontroller 301 input, described microcontroller 301 output end respectively with alarm module 304 and aobvious
Show that module 305 is connected；Described micro-control unit 3 also includes key-press module 303, described key-press module 303 and microcontroller 301
Input is connected；Described microcontroller 301 output end is connected with tower crane electronic control module 4 by relay module 306.Its
In, display module 305 adopts BTL002 segment liquid crystal screen, and the lcd driver that can be carried by single-chip microcomputer MSP430F4152 drives
Dynamic, this liquid crystal display can show run time and the system failure running status code of brake.Key-press module 303 includes 8
Button, 8 buttons are converted into serial signal to the parallel interface of 74LS165 by connecing to connect after 8 pull-up resistors, deliver to list
Piece machine MSP430F4152, wherein ENTER are write key, RESET is reset key, SET is setting key, UP is upper line unit, DOWN is
Lower line unit, SHIFT are shift key, MODE is mode selecting key, DEL is return key.
Further, described microcontroller output is connected with PLC 7 by serial port module 307, is so easy to
Derrick crane using PLC is controlled.Transistor-Transistor Logic level is converted to by serial port module 307 by SP3232 chip
RS232 level, for control PLC type tower crane, convenient cut-out tower crane PLC output.
In present embodiment, single-chip microcomputer MSP430F4152 selected by microcontroller 301, and whole circuit adopts power circuit to supply
Electricity, AC rectification is become direct current by rectification circuit by power circuit, is then depressured chip by voltage drop by LM5575 Width funtion
To 12V, by AMS1117-5V voltage stabilizing to 5V, then through TPS78233 by voltage voltage stabilizing to 3.3V supply single-chip microcomputer work, 12V or
5V voltage can be powered to relay or other components and parts.
As shown in Fig. 2 described A/D sampling module includes Wheatstone bridge 5 and amplifier U3, amplifier U3 adopts integrated list
Power supply instrument amplifier AD623, the flexibility having had.It can arrive in single supply+3V and provide the output of rail to rail under+12V.
Allow to carry out gain programming using single gain setting resistor.In present embodiment, Wheatstone bridge 5 is by resistance R2, R3 and R10
Composition, described resistance R2 is connected with 3.3V power supply by resistance R1.The intermediate connection point of described resistance R2 and resistance R1 passes through
Three-terminal voltage-stabilizing diode U1 is grounded, parallel resistance R5 between described three-terminal voltage-stabilizing diode U1 and ground, three-terminal voltage-stabilizing diode U1
Using TL431.The input of described Wheatstone bridge 5 is connected with thermistor RL, and thermistor RL adopts PT100.Described
No. 2 pins of Wheatstone bridge 5 output end amplifier U3 and No. 3 pins are connected, No. 1 pin of amplifier U3 and No. 8 pins
Between connect resistance R4.The parallel circuit ground connection by electric capacity C1 and C2 for No. 1 pin of amplifier U3.Described amplifier U3 output
End is connected with low pass filter input, and described first low pass filter output is connected with microcontroller input ADC0.Institute
Stating low pass filter is second order Butterworth LPF 6, is made up of U2A and U2B, U2A and U2B is LMC6572.Amplifier
No. 6 pins of U3 are connected with No. 5 pins of U2B by resistance R8, and No. 5 pins of U2B are grounded by electric capacity C4, No. 6 of U2B
Pin is connected with No. 7 pins.No. 7 pins of U2B pass through resistance R6, the series circuit of resistance R7 is connected with No. 3 pins of U2A
Connect, No. 3 pins of U2B are grounded by electric capacity C3, No. 2 pins of U2B are connected with No. 1 pin.Wherein, resistance R1 is 5.1K,
Resistance R2, R3, R5 are 2K, and resistance R10, R4 are 1K, and resistance R8 is 15.8K, and resistance R6 is 4.87K, and resistance R7 is 11K；Electric capacity
C1 is 10 μ F, and electric capacity C2 is 0.1 μ F, and electric capacity C3, C4 are 10nF.
As shown in figure 3, described alarm module includes buzzer LS1 and switch triode Q3, described buzzer LS1 two ends are divided
It is not connected with power supply and switch triode Q3 emitter stage, described switch triode Q3 ground level and microcontroller output BEEP phase
Connect, the grounded collector of described switch triode Q3.Microcontroller 301 sends alarm signal, after triode Q3 amplifies,
Active buzzer LS1 is driven to report to the police.
As shown in figure 4, described relay module includes relay K1 and optocoupler U11, No. 1 pin of described optocoupler U11 leads to
Cross resistance R32 to be connected with 3.3V power supply, No. 2 pins of described optocoupler U11 are connected with microcontroller output；Described optocoupler
No. 3 pin ground connection of U11, No. 4 pins of described optocoupler U11 are connected with triode Q1 base stage by resistance R33, described optocoupler
No. 4 pins of U11 are connected with triode Q1 emitter stage by resistance R31, and described triode Q1 emitter stage is connected with 12V power supply
Connect and be connected；Described triode Q1 colelctor electrode is connected with No. 4 pins of relay K1, and No. 5 pins of described relay K1 connect
Ground；Reversal connection diode D2 between No. 4 pins of described relay K1 and No. 5 pins.Relay module is by microcontroller 301
RELAY ON pin sending signal, through optocoupler U11 isolation drive, and amplifies rear-guard motor type relay K1 through triode Q1.
Although the foregoing describing specific embodiment of the present utility model, those skilled in the art should manage
Solution, these are merely illustrative of, and can make various changes or modifications to present embodiment, without departing from the principle of utility model
And essence, protection domain of the present utility model is only limited by the claims that follow.
Claims (8)
1. a kind of derrick crane transmission system thermal detector, including being arranged on tower crane rotation motor or electromagnetic braking
Thermistor on device it is characterised in that：Described thermistor is connected with the A/D sampling module of micro-control unit by plug connector
Connect, described A/D sampling module is connected with microcontroller input, described microcontroller output respectively with alarm module and aobvious
Show that module is connected；Described micro-control unit also includes key-press module, and described key-press module is connected with microcontroller input；
Described microcontroller output is connected with tower crane electronic control module by relay module.
2. according to the derrick crane transmission system thermal detector described in claim 1 it is characterised in that：Described A/D sampling
Module includes Wheatstone bridge and amplifier, and the input of described Wheatstone bridge is connected with thermistor, described favour stone
Bridge output is connected with amplifier in, and described amplifier out is connected with low pass filter input, described
First low pass filter output is connected with microcontroller input.
3. according to the derrick crane transmission system thermal detector described in claim 2 it is characterised in that：Described amplifier is
Integrated single supply instrument amplifier AD623.
4. according to the derrick crane transmission system thermal detector described in claim 2 it is characterised in that：Described LPF
Device is second order Butterworth LPF.
5. according to the derrick crane transmission system thermal detector described in claim 1 it is characterised in that：Described alarm module
Including buzzer and switch triode Q3, described buzzer two ends are connected with power supply and switch triode Q3 emitter stage respectively,
Described switch triode Q3 ground level is connected with microcontroller output, the grounded collector of described switch triode Q3.
6. according to the derrick crane transmission system thermal detector described in claim 1 it is characterised in that：Described relay mould
Block includes relay K1 and optocoupler U11, and No. 1 pin of described optocoupler U11 is connected with 3.3V power supply by resistance R32, described
No. 2 pins of optocoupler U11 are connected with microcontroller output；No. 3 pin ground connection of described optocoupler U11, described optocoupler U11's
No. 4 pins are connected with triode Q1 base stage by resistance R33, and No. 4 pins of described optocoupler U11 pass through resistance R31 and three poles
Pipe Q1 emitter stage is connected, and described triode Q1 emitter stage is connected with 12V power supply；Described triode Q1 colelctor electrode with
No. 4 pins of relay K1 are connected, No. 5 pin ground connection of described relay K1；No. 4 pins of described relay K1 and No. 5
Reversal connection diode D2 between pin.
7. according to the derrick crane transmission system thermal detector described in claim 1 it is characterised in that：Described thermistor
It is arranged on tower crane rotation motor, described thermistor is two or more, and each thermistor described is independent
It is connected with microcontroller input by an A/D sampling module.
8. according to the derrick crane transmission system thermal detector described in claim 1 it is characterised in that：Described microcontroller
Output end is connected with PLC by serial port module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620921659.5U CN205953363U (en) | 2016-08-22 | 2016-08-22 | Thermal detector for tower crane transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620921659.5U CN205953363U (en) | 2016-08-22 | 2016-08-22 | Thermal detector for tower crane transmission system |
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| Publication Number | Publication Date |
|---|---|
| CN205953363U true CN205953363U (en) | 2017-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620921659.5U Active CN205953363U (en) | 2016-08-22 | 2016-08-22 | Thermal detector for tower crane transmission system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106219407A (en) * | 2016-08-22 | 2016-12-14 | 江苏中建达丰机械工程有限公司 | Derrick crane drive system thermal detector |
| CN108147244A (en) * | 2017-12-25 | 2018-06-12 | 戴嘉宝 | Elevator maintenance system based on Internet of Things |
| CN112166395A (en) * | 2019-07-30 | 2021-01-01 | 深圳市大疆创新科技有限公司 | Holder control method, holder and computer readable storage medium |
-
2016
- 2016-08-22 CN CN201620921659.5U patent/CN205953363U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106219407A (en) * | 2016-08-22 | 2016-12-14 | 江苏中建达丰机械工程有限公司 | Derrick crane drive system thermal detector |
| CN108147244A (en) * | 2017-12-25 | 2018-06-12 | 戴嘉宝 | Elevator maintenance system based on Internet of Things |
| CN112166395A (en) * | 2019-07-30 | 2021-01-01 | 深圳市大疆创新科技有限公司 | Holder control method, holder and computer readable storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 213200 room 223, 168 Huacheng Middle Road, Jintan District, Changzhou City, Jiangsu Province Patentee after: Jiangsu Zhongjian Dafeng Mechanical Engineering Co.,Ltd. Address before: 213200 room 223, 168 Huacheng Middle Road, Jintan District, Changzhou City, Jiangsu Province Patentee before: JIANGSU ZHONGJIAN DAFENG MACHINERY ENGINEERING CO.,LTD. |
|
| CP01 | Change in the name or title of a patent holder |