CN105174065A - Failure monitoring method and device for crane - Google Patents
Failure monitoring method and device for crane Download PDFInfo
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- CN105174065A CN105174065A CN201510641931.4A CN201510641931A CN105174065A CN 105174065 A CN105174065 A CN 105174065A CN 201510641931 A CN201510641931 A CN 201510641931A CN 105174065 A CN105174065 A CN 105174065A
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Abstract
The invention relates to a failure monitoring method and device for a crane. The failure monitoring method for the crane comprises a transmission chain breakage failure monitoring method. The transmission chain breakage failure monitoring method comprises the following steps that A1, the rotating speed signal of a motor of the crane and the rotating speed signal of a winding drum of the crane are collected to determine the rotating speed of the motor and the rotating speed of the winding drum; A2, if neither the rotating speed of the motor nor the rotating speed of the winding drum is 0, the transmission ratio of the rotating speed of the motor and the rotating speed of the winding drum is calculated and compared with a preset transmission ratio value; and A3, if the transmission ratio exceeds the preset transmission ratio value, it is determined that a transmission chain breakage failure happens between the motor and the winding drum. Transmission chain breakage and other failures of the crane can be monitored, the problem that a safety monitor and protection scheme in the prior art is not perfect enough is solved, and safety accidents and losses of the crane are reduced.
Description
Technical field
The present invention relates to crane safety monitoring technique field, particularly relate to a kind of failure monitoring method and the device that are applicable to goliath.
Background technology
Goliath belongs to special equipment, is mainly used in the large-scale or heavy objects of handling.Based on security consideration, hoisting crane is generally configured with overload protection, overspeed protection, slips the devices such as hook protection, position limitation protection, its lift system is also furnished with service brake, emergency stopper and sure brake.But due to the structure relative complex of goliath, need the safety precaution taking into account each of each side, existing security monitoring and protectiving scheme are still perfect not.
Such as, may be there is messenger chain breakage failure in hoisting crane, described messenger chain breakage failure refers to that the faults such as fracture fragmentation appear in the positions such as (being located between the motor of hoisting crane and reel) motor shaft, coupler, reductor, exposed gear, drum shaft.This type of fault is easily accidents caused and cause heavy losses, but does not take actv. monitoring scheme in prior art.
In addition, the lift system of general goliath as shown in Figure 1, (Fig. 1 is not shown mainly to comprise motor 1, drop-gear box 2, reel 3 and gib head, reel 3 is wound with hawser, gib head is fixed on hawser with carry object), the transmission of motor 1 is with movable reel 3 to rotate after drop-gear box 2 slows down, and is driven the lifting of gib head, with handling object by the rotation of reel 3.When breaking down, lift system likely can have static reversion fault or dynamic inverted fault.Wherein, static reversion fault refers to: when lift system is in stopped status, once there is the situation such as brake fault or slow-speed shaft off-axis fault, reel 3 and hawser thereof will there will be loosening, cause gib head to produce this phenomenon of displacement downwards; If occur static reversion fault and do not take measures in time under band carries situation, consequence will be very serious.Dynamic inverted fault refers to: when lift system is in running order, once there is electrical fault, moment is not enough to overcome load weight, causes gib head to decline rapidly; Or because control signal, control circuit break down, cause the phenomenon that biconditional operation direction, hoisting crane real-world operation direction is inconsistent; This phenomenon is equally easily accidents caused, causes heavy losses.But prior art does not take actv. monitoring scheme equally for static state reversion fault or dynamic inverted fault.
Summary of the invention
One object of the present invention is, proposes a kind of hoisting crane failure monitoring method monitoring messenger chain breakage failure, to solve security monitoring of the prior art and the perfect not problem of protectiving scheme, reduces crane safety accident and loss.
A kind of hoisting crane failure monitoring method that the present invention proposes, it comprises messenger chain breakage failure method for supervising, and described messenger chain breakage failure method for supervising comprises the following steps:
A1, gather the tach signal of crane motor and the tach signal of reel respectively, to determine motor speed and drum speed;
If the described motor speed of A2 and drum speed all non-vanishing, then calculate the transmitting ratio of described motor speed and drum speed, and compare with transmitting ratio preset value;
If the described transmitting ratio of A3 exceeds transmitting ratio preset value, then determine to occur messenger chain breakage failure between described motor and reel.
In present invention further optimization scheme, specifically comprise in steps A 1:
A11, gather motor in the pulse count of unit time internal trigger by motor side pulse coder, to determine motor speed; The pulse count of reel in unit time internal trigger is gathered, to determine drum speed by reel side pulse coder.
Second object of the present invention is, proposes further a kind of hoisting crane failure monitoring method monitoring static reversion fault, to solve security monitoring of the prior art and the perfect not problem of protectiving scheme further, reduces crane safety accident and loss.
A kind of hoisting crane failure monitoring method that the present invention proposes further, it also comprises static reversion failure monitoring method, and described static state reversion failure monitoring method comprises the following steps:
B1, determine that crane lifting mechanism is in stopped status;
B2, the tach signal gathering hoist roller and reverse angle signal, to determine drum speed and reverse angle respectively;
If the described drum speed of B3 exceedes static rotating speed preset value or reverse angle exceedes static angular preset value, then determine to occur static reversion fault.
In present invention further optimization scheme, described step B2 specifically comprises:
B21, the pulse count triggered by described reel in the pulse coder acquisition units time of reel side and overall pulse number, determine drum speed and reverse angle respectively.
5, hoisting crane failure monitoring method according to claim 4, is characterized in that, in described step B2, reel side pulse coder carries out continuous collecting to described reel in the pulse count of unit time internal trigger and overall pulse number in the first Preset Time; Described step B3 specifically comprises:
If B31 is in described first Preset Time, the reel collected all exceedes static rotating speed preset value at the drum speed that the pulse count of unit time internal trigger is corresponding, then determine to occur static reversion fault; Or if in described first Preset Time, the reverse angle that the overall pulse number that the reel collected triggers is corresponding exceedes static angular preset value, then determine to occur static reversion fault.
3rd object of the present invention is, further proposes a kind of hoisting crane failure monitoring method monitoring dynamic inverted fault, to solve security monitoring of the prior art and the perfect not problem of protectiving scheme further, reduces crane safety accident and loss.
A kind of hoisting crane failure monitoring method that the present invention proposes further, it also comprises dynamic inverted failure monitoring method, and described dynamic inverted failure monitoring method comprises the following steps:
C1, determine that crane lifting mechanism is in running state;
The turn sign of C2, collection hoist roller, to determine that reel turns to;
If the described reel of C3 turns to contrary with operating order direction, then gather the reverse angle signal of hoist roller, to determine the reverse angle of reel;
If C4 reverse angle exceedes dynamic angle preset value, then determine to occur dynamic inverted fault.
In present invention further optimization scheme, by the turn sign of reel side coder continuous collecting reel in the second Preset Time in described step C2; If in described step C3 in described second Preset Time, reel turns to all contrary with operating order direction, then determine to occur dynamic inverted fault in step C4;
If in described step C4 in described second Preset Time, the reverse angle that the overall pulse number that the reel that reel side coder collects triggers is corresponding exceedes dynamic angle preset value, then determine to occur dynamic inverted fault in step C4.
In addition, the present invention is a kind of hoisting crane failure monitoring device of corresponding proposition also, and it comprises motor signal collecting unit, reel signal gathering unit, calculating unit and identifying unit; Wherein,
Described motor signal collecting unit, for gathering the tach signal of crane motor, to determine motor speed;
Described reel signal gathering unit, for gathering the tach signal of hoist roller, to determine drum speed;
Described calculating unit, for described motor speed and drum speed all non-vanishing time, calculate the transmitting ratio of described motor speed and drum speed, and compare with transmitting ratio preset value;
Described identifying unit, for when described transmitting ratio exceeds transmitting ratio preset value, determines to occur messenger chain breakage failure between described motor and reel.
In present invention further optimization scheme, also comprise running state monitoring unit; Described running state monitoring unit is used for determining that crane lifting mechanism is in stopped status;
Described reel signal gathering unit, also for gathering the tach signal of hoist roller in static state reversion and reverse angle signal, to determine drum speed in static reversion and reverse angle respectively;
Described calculating unit, also whether exceed static rotating speed preset value for calculating drum speed in static reversion, and whether reverse angle exceedes static angular preset value;
Described identifying unit, also exceedes static rotating speed preset value for drum speed in static state reversion, or when reverse angle exceedes static angular preset value, determines to occur static reversion fault.
In present invention further optimization scheme, described running state monitoring unit is also for determining that crane lifting mechanism is in running state;
Described reel signal gathering unit, also for gathering the turn sign of hoist roller in dynamic inverted and reverse angle signal, to determine that the reel in dynamic inverted turns to and reverse angle respectively;
Described calculating unit, also whether contrary with operating order direction for determining that in dynamic inverted reel turns to, and whether calculating reverse angle exceedes dynamic angle preset value;
Described identifying unit, also turns to contrary with operating order direction for reel in dynamic inverted, or and reverse angle exceedes dynamic angle preset value time, determine to occur dynamic inverted fault.
The present invention at least has following beneficial effect:
1, the messenger chain breakage failure of hoisting crane can be monitored, solve security monitoring of the prior art and the perfect not problem of protectiving scheme, decrease crane safety accident and loss;
2, by gathering the tach signal of motor and the tach signal of reel, indirectly judge messenger chain breakage failure, realize conveniently, reliability is high, and does not need overspending manually and material cost.
3, when motor speed and drum speed all non-vanishing (getting rid of electrical fault or reel fault), by calculating the transmitting ratio of motor speed and drum speed, and compare to judge messenger chain breakage failure with transmitting ratio preset value, conceive original, calculate simple, and the reliability judged improve further.
4, can monitor hoisting crane static state reversion fault further, judge static reversion fault by the tach signal and reverse angle signal gathering hoist roller, global reliability and safety improve further;
5, can monitor hoisting crane dynamic inverted fault further, judge dynamic inverted fault by the turn sign and reverse angle signal gathering hoist roller, global reliability and safety improve further again.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art crane lifting mechanism.
Fig. 2 is the schematic flow sheet of messenger chain breakage failure method for supervising in embodiment one.
Fig. 3 is the structural representation of the lift system being provided with pulse coder in embodiment.
Fig. 4 is the schematic flow sheet of static reversion failure monitoring method in embodiment two.
Fig. 5 is the schematic flow sheet of dynamic inverted failure monitoring method in embodiment three.
Fig. 6 is the functionalization structural representation of hoisting crane failure monitoring device in embodiment four.
Fig. 7 is the functionalization structural representation of hoisting crane failure monitoring device in embodiment five.
In Fig. 1 and Fig. 3: 1-motor, 2-drop-gear box, 3-reel, 4-motor side pulse coder, 5-reel side pulse coder 5.
Detailed description of the invention
For the ease of it will be appreciated by those skilled in the art that the present invention is described further below in conjunction with accompanying drawing and embodiment.
Embodiment one
Refer to Fig. 2, embodiment proposes a kind of hoisting crane failure monitoring method, comprises messenger chain breakage failure method for supervising, and described messenger chain breakage failure method for supervising mainly comprises the following steps S100 to S300:
S100, gather the tach signal of crane motor and the tach signal of reel respectively, to determine motor speed and drum speed.
In described step S100, the mode gathering the tach signal of motor and the tach signal of reel can be varied, and the present embodiment gathers preferably by pulse coder.Particularly, refer to Fig. 3 (comprising existing motor 1, drop-gear box 2 and reel 3 etc.), difference mounted motor side pulse coder 4 and reel side pulse coder 5 on existing lift system, described step S100 specifically can comprise step S110 thus:
S110, gather motor in the pulse count of unit time internal trigger by motor side pulse coder, to determine motor speed; The pulse count of reel in unit time internal trigger is gathered, to determine drum speed by reel side pulse coder.
If the described motor speed of S200 and drum speed all non-vanishing, then calculate the transmitting ratio of described motor speed and drum speed, and compare with transmitting ratio preset value.
If motor speed or drum speed have one to be zero, be then likely the fault of motor own or the fault of reel own, therefore in step S200, eliminate the situation that motor speed or drum speed are zero, with exclusive PCR factor, improve reliability.Described transmitting ratio refers to the ratio of current motor rotating speed and drum speed; Described transmitting ratio preset value be preferably motor and reel in normal state intrinsic gear ratio value (different because of distinct device) 90% to 110%; Certainly, being set to 90% to 110% is for preventing subsequent step from judging by accident, and the present embodiment also can be set to other suitable scopes as required.
If the described transmitting ratio of S300 exceeds transmitting ratio preset value, then determine to occur messenger chain breakage failure between described motor and reel.
In described step S300, due to eliminate be the fault of motor own or the fault of reel own may, if described transmitting ratio exceeds transmitting ratio preset value, be then occur messenger chain breakage failure between motor and reel naturally.
Determine to occur messenger chain breakage failure between described motor and reel in step S300, control signal can be exported further, control concerned brake device and brake, to guarantee load safety, avoid accident to occur, and reduce the loss.
Embodiment two
Refer to Fig. 4, a kind of hoisting crane failure monitoring method that embodiment two proposes, on the basis of embodiment one, also comprise static reversion failure monitoring method, described static state reversion failure monitoring method mainly comprises the following steps M100 to M300:
M100, determine that crane lifting mechanism is in stopped status.
In described step M100, lift system is in stopped status and comprises off-position, and what can determine when lift system is in stopped status to need to take is the measure of static reversion failure monitoring, in this, as the foundation performing subsequent step.
M200, the tach signal gathering hoist roller and reverse angle signal, to determine drum speed and reverse angle respectively.
In described step M200, the collection tach signal of reel and the mode of reverse angle signal can be varied equally, and the present embodiment gathers preferably by the reel side pulse coder shown in Fig. 3.Described step M200 specifically can comprise step M210 thus:
M210, the pulse count triggered by described reel in the pulse coder acquisition units time of reel side and overall pulse number, determine drum speed and reverse angle respectively.
The pulse count triggered according to reel described in the unit time in step M210 can obtain drum speed, can determine the reverse angle of reel according to the overall pulse number collected.
If the described drum speed of M300 exceedes static rotating speed preset value or reverse angle exceedes static angular preset value, then determine to occur static reversion fault.
In step M300, static rotating speed preset value and static angular preset value can be arranged in conjunction with daily experience according to concrete equipment situation, and the present embodiment is not particularly limited.
In addition, in order to exclusive PCR, improve reliability, in above-mentioned steps M200 to M300 in the first Preset Time (such as 1s-10s), continue to perform, finally to determine whether to occur static reversion fault, specific as follows:
In described step M200, reel side pulse coder carries out continuous collecting to described reel in the pulse count of unit time internal trigger in the first Preset Time; Described step M300 specifically comprises: if M310 is in described first Preset Time, the reel collected all exceedes static rotating speed preset value at the drum speed that the pulse count of unit time internal trigger is corresponding, then determine to occur static reversion fault; Or if in described first Preset Time, the reverse angle that the overall pulse number that the reel collected triggers is corresponding exceedes static angular preset value, then determine to occur static reversion fault.
After step M300 (or M310) determines to occur static reversion fault, control signal can be exported further, control concerned brake device and brake, to guarantee load safety, avoid accident to occur, and reduce the loss.
Embodiment three
Refer to Fig. 5, a kind of hoisting crane failure monitoring method that embodiment three proposes, on the basis of embodiment one or embodiment two, also comprise dynamic inverted failure monitoring method, described dynamic inverted failure monitoring method mainly comprises the following steps L100 to L400:
L100, determine that crane lifting mechanism is in running state.
What can determine when in step L100, lift system is in running state to need to take is the measure of dynamic inverted failure monitoring, in this, as the foundation performing subsequent step.
The turn sign of L200, collection hoist roller, to determine that reel turns to.
The mode gathering the turn sign of reel in described step L200 can be varied equally, and the present embodiment is preferably same to be gathered by the reel side pulse coder shown in Fig. 3.
If the described reel of L300 turns to contrary with operating order direction, then gather the reverse angle signal of hoist roller, to determine the reverse angle of reel.
In step L300, if described reel turns to the reverse angle signal that be just necessary gather hoist roller contrary to operating order direction, otherwise just can determine there is not dynamic inverted fault; The reverse angle signal simultaneously gathering reel can be performed by the reel side pulse coder shown in Fig. 3 equally.
If L400 reverse angle exceedes dynamic angle preset value, then determine to occur dynamic inverted fault.
In step L400, Dynamic Speed preset value and dynamic angle preset value can be arranged in conjunction with daily experience according to concrete equipment situation, and the present embodiment is not particularly limited.
In addition, in order to exclusive PCR, improve reliability, in above-mentioned steps L200 to L400 in the second Preset Time (such as 1s-10s), continue to perform, finally to determine whether to occur dynamic inverted fault, specific as follows:
By the turn sign of reel side coder continuous collecting reel in the second Preset Time in described step L200; If in described step L300 in described second Preset Time, reel turns to all contrary with operating order direction, then determine to occur dynamic inverted fault in step L400; If in described step L400 in described second Preset Time, the reverse angle that the overall pulse number that the reel that reel side coder collects triggers is corresponding exceedes dynamic angle preset value, then determine to occur dynamic inverted fault in step L400.
When step L400 determines to occur dynamic inverted fault, control signal can be exported further, control concerned brake device and brake, to guarantee load safety, avoid accident to occur, and reduce the loss.
Embodiment four
Refer to Fig. 6, a kind of hoisting crane failure monitoring device that embodiment four proposes, to propose a kind of hoisting crane failure monitoring method corresponding with previous embodiment one, and it comprises motor signal collecting unit 10, reel signal gathering unit 20, calculating unit 30 and identifying unit 40, wherein:
Described motor signal collecting unit 10, for gathering the tach signal of crane motor, to determine motor speed.
Described reel signal gathering unit 20, for gathering the tach signal of hoist roller, to determine drum speed.
Described calculating unit 30, for described motor speed and drum speed all non-vanishing time, calculate the transmitting ratio of described motor speed and drum speed, and compare with transmitting ratio preset value.
Described identifying unit 40, for when described transmitting ratio exceeds transmitting ratio preset value, determines to occur messenger chain breakage failure between described motor and reel.
Especially, described motor signal collecting unit 10 and reel signal gathering unit 20 specifically all can refer to pulse coder, are located at motor side and reel side respectively.
The principle of work of embodiment four and beneficial effect corresponding with embodiment one, repeat no more here.
Embodiment five
Refer to Fig. 7, a kind of hoisting crane failure monitoring device that embodiment five proposes, on the basis of embodiment four, also comprise running state monitoring unit 50; Described running state monitoring unit 50 is for determining that crane lifting mechanism is in stopped status.
Described reel signal gathering unit 20, also for gathering the tach signal of hoist roller in static state reversion and reverse angle signal, to determine drum speed in static reversion and reverse angle respectively.
Described calculating unit 30, also whether exceed static rotating speed preset value for calculating drum speed in static reversion, and whether reverse angle exceedes static angular preset value.
Described identifying unit 40, also exceedes static rotating speed preset value for drum speed in static state reversion, or when reverse angle exceedes static angular preset value, determines to occur static reversion fault.
The principle of work of embodiment five and beneficial effect corresponding with embodiment two, repeat no more here.
Embodiment six
A kind of hoisting crane failure monitoring device that embodiment six proposes, on the basis of embodiment five, has done further restriction, specific as follows:
Described running state monitoring unit 50 is also for determining that crane lifting mechanism is in running state.
Described reel signal gathering unit 20, also for gathering the turn sign of hoist roller in dynamic inverted and reverse angle signal, to determine that the reel in dynamic inverted turns to and reverse angle respectively.
Described calculating unit 30, also whether contrary with operating order direction for determining that in dynamic inverted reel turns to, and whether calculating reverse angle exceedes dynamic angle preset value.
Described identifying unit 40, also turns to contrary with operating order direction for reel in dynamic inverted, or and reverse angle exceedes dynamic angle preset value time, determine to occur dynamic inverted fault.
The principle of work of embodiment six and beneficial effect corresponding with embodiment three, repeat no more here.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a hoisting crane failure monitoring method, is characterized in that, comprises messenger chain breakage failure method for supervising, and described messenger chain breakage failure method for supervising comprises the following steps:
A1, gather the tach signal of crane motor and the tach signal of reel respectively, to determine motor speed and drum speed;
If the described motor speed of A2 and drum speed all non-vanishing, then calculate the transmitting ratio of described motor speed and drum speed, and compare with transmitting ratio preset value;
If the described transmitting ratio of A3 exceeds transmitting ratio preset value, then determine to occur messenger chain breakage failure between described motor and reel.
2. hoisting crane failure monitoring method according to claim 1, is characterized in that, specifically comprises in steps A 1:
A11, gather motor in the pulse count of unit time internal trigger by motor side pulse coder, to determine motor speed; The pulse count of reel in unit time internal trigger is gathered, to determine drum speed by reel side pulse coder.
3. hoisting crane failure monitoring method according to claim 1 and 2, is characterized in that, also comprises static reversion failure monitoring method, and described static state reversion failure monitoring method comprises the following steps:
B1, determine that crane lifting mechanism is in stopped status;
B2, the tach signal gathering hoist roller and reverse angle signal, to determine drum speed and reverse angle respectively;
If the described drum speed of B3 exceedes static rotating speed preset value or reverse angle exceedes static angular preset value, then determine to occur static reversion fault.
4. hoisting crane failure monitoring method according to claim 3, is characterized in that, described step B2 specifically comprises:
B21, the pulse count triggered by described reel in the pulse coder acquisition units time of reel side and overall pulse number, determine drum speed and reverse angle respectively.
5. hoisting crane failure monitoring method according to claim 4, is characterized in that, in described step B2, reel side pulse coder carries out continuous collecting to described reel in the pulse count of unit time internal trigger and overall pulse number in the first Preset Time; Described step B3 specifically comprises:
If B31 is in described first Preset Time, the reel collected all exceedes static rotating speed preset value at the drum speed that the pulse count of unit time internal trigger is corresponding, then determine to occur static reversion fault; Or if in described first Preset Time, the reverse angle that the overall pulse number that the reel collected triggers is corresponding exceedes static angular preset value, then determine to occur static reversion fault.
6. hoisting crane failure monitoring method according to claim 1 and 2, is characterized in that, also comprises dynamic inverted failure monitoring method, and described dynamic inverted failure monitoring method comprises the following steps:
C1, determine that crane lifting mechanism is in running state;
The turn sign of C2, collection hoist roller, to determine that reel turns to;
If the described reel of C3 turns to contrary with operating order direction, then gather the reverse angle signal of hoist roller, to determine the reverse angle of reel;
If C4 reverse angle exceedes dynamic angle preset value, then determine to occur dynamic inverted fault.
7. hoisting crane failure monitoring method according to claim 6, is characterized in that, by the turn sign of reel side coder continuous collecting reel in the second Preset Time in described step C2; If in described step C3 in described second Preset Time, reel turns to all contrary with operating order direction, then determine to occur dynamic inverted fault in step C4;
If in described step C4 in described second Preset Time, the reverse angle that the overall pulse number that the reel that reel side coder collects triggers is corresponding exceedes dynamic angle preset value, then determine to occur dynamic inverted fault in step C4.
8. a hoisting crane failure monitoring device, is characterized in that, comprises motor signal collecting unit, reel signal gathering unit, calculating unit and identifying unit; Wherein,
Described motor signal collecting unit, for gathering the tach signal of crane motor, to determine motor speed;
Described reel signal gathering unit, for gathering the tach signal of hoist roller, to determine drum speed;
Described calculating unit, for described motor speed and drum speed all non-vanishing time, calculate the transmitting ratio of described motor speed and drum speed, and compare with transmitting ratio preset value;
Described identifying unit, for when described transmitting ratio exceeds transmitting ratio preset value, determines to occur messenger chain breakage failure between described motor and reel.
9. hoisting crane failure monitoring device according to claim 8, is characterized in that, also comprises running state monitoring unit; Described running state monitoring unit is used for determining that crane lifting mechanism is in stopped status;
Described reel signal gathering unit, also for gathering the tach signal of hoist roller in static state reversion and reverse angle signal, to determine drum speed in static reversion and reverse angle respectively;
Described calculating unit, also whether exceed static rotating speed preset value for calculating drum speed in static reversion, and whether reverse angle exceedes static angular preset value;
Described identifying unit, also exceedes static rotating speed preset value for drum speed in static state reversion, or when reverse angle exceedes static angular preset value, determines to occur static reversion fault.
10. hoisting crane failure monitoring device according to claim 9, is characterized in that, described running state monitoring unit is also for determining that crane lifting mechanism is in running state;
Described reel signal gathering unit, also for gathering the turn sign of hoist roller in dynamic inverted and reverse angle signal, to determine that the reel in dynamic inverted turns to and reverse angle respectively;
Described calculating unit, also whether contrary with operating order direction for determining that in dynamic inverted reel turns to, and whether calculating reverse angle exceedes dynamic angle preset value;
Described identifying unit, also turns to contrary with operating order direction for reel in dynamic inverted, or and reverse angle exceedes dynamic angle preset value time, determine to occur dynamic inverted fault.
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| CN105174065B (en) | 2017-03-22 |
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