CN108664051A - Maintaining method, device and the holder of horizontal stage electric machine - Google Patents
Maintaining method, device and the holder of horizontal stage electric machine Download PDFInfo
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- CN108664051A CN108664051A CN201710192591.0A CN201710192591A CN108664051A CN 108664051 A CN108664051 A CN 108664051A CN 201710192591 A CN201710192591 A CN 201710192591A CN 108664051 A CN108664051 A CN 108664051A
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- China
- Prior art keywords
- electric machine
- stage electric
- horizontal stage
- temperature value
- preset temperature
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
Abstract
The invention discloses a kind of maintaining method of horizontal stage electric machine, device and holders, belong to monitoring field.The method includes：Determine the current working condition of horizontal stage electric machine；Obtain the first current temperature value of horizontal stage electric machine；Horizontal stage electric machine is safeguarded according to working condition and the first temperature value.The present invention safeguards horizontal stage electric machine according to working condition and the first temperature value by horizontal stage electric machine maintenance device, so that on the one hand, it ensure that horizontal stage electric machine can with high-performance be run in most of temperature range when horizontal stage electric machine is in normal operating conditions, also avoiding horizontal stage electric machine enters abnormal operation simultaneously, on the other hand, when horizontal stage electric machine is in abnormal operation, the problem of horizontal stage electric machine maintenance device with itself can exclude that horizontal stage electric machine is caused to can not work normally, holder is rushed to without technical staff to safeguard horizontal stage electric machine with setting up, to improve the flexibility of horizontal stage electric machine maintenance, reduce the maintenance cost of horizontal stage electric machine.
Description
Technical field
The present invention relates to monitoring field, more particularly to a kind of maintaining method of horizontal stage electric machine, device and holder.
Background technology
Holder is a kind of relatively conventional monitoring device, is mainly used for supporting video camera, and adjust the angle of video camera.
Under normal circumstances, horizontal stage electric machine is installed, horizontal stage electric machine is connect with video camera, the level angle for adjusting video camera in holder
And can pitch angle, horizontal stage electric machine work normally most important for the monitoring function of holder.In practical applications, cloud
Platform motor usually contains magnetic material, at high temperature it is possible that demagnetization phenomenon, the power exported so as to cause horizontal stage electric machine
Square declines, and results even in horizontal stage electric machine and step-out phenomenon occurs, to make horizontal stage electric machine can not work normally.In addition, in low temperature
When, the performance of the lubricating oil in horizontal stage electric machine may deteriorate, this is also likely to that horizontal stage electric machine is caused step-out phenomenon occur so that
Horizontal stage electric machine can not work normally.
In the related technology, when the horizontal stage electric machine in holder can not work normally, technical staff needs to rush to the holder
Ground is set up, discharge leads to the problem of horizontal stage electric machine can not work normally in the holder, and restarts the horizontal stage electric machine.
In the implementation of the present invention, the inventor finds that the existing technology has at least the following problems：
In practical application, the erection range of holder is wider, and, the position that some holders are set up is more remote, this is resulted in
The maintenance activities of current horizontal stage electric machine are poor, and maintenance cost is higher.
Invention content
In order to solve the problems, such as that prior art maintenance activities are poor, maintenance cost is higher, an embodiment of the present invention provides
A kind of maintaining method of horizontal stage electric machine, device and holder.The technical solution is as follows：
In a first aspect, providing a kind of maintaining method of horizontal stage electric machine, the maintaining method of the horizontal stage electric machine is applied to holder
In maintenance of motor device, the method includes：
Determine that the current working condition of horizontal stage electric machine, the working condition are normal operating conditions or abnormal operation；
Obtain the first current temperature value of the horizontal stage electric machine；
The horizontal stage electric machine is safeguarded according to the working condition and first temperature value.
Optionally, the current working condition of the determining horizontal stage electric machine, including：
The heartbeat signal that horizontal stage electric machine control device is sent is received, the horizontal stage electric machine control device is for controlling the cloud
Platform motor；
When the heartbeat signal is identical as preset normal heartbeat signal, determine that the horizontal stage electric machine is in normal
Working condition；
When the heartbeat signal and the normal heartbeat signal differ, alternatively, being had not been obtained in preset duration described
When heartbeat signal, determine that the horizontal stage electric machine is in abnormal operation.
Optionally, described that the horizontal stage electric machine is safeguarded according to the working condition and first temperature value, packet
It includes：
When the horizontal stage electric machine is in abnormal operation, and first temperature value is more than the first preset temperature value,
Cooled down to the horizontal stage electric machine by the way that the temperature control modules around the horizontal stage electric machine are arranged；
When the horizontal stage electric machine is in abnormal operation, and first temperature value is less than the second preset temperature value,
The horizontal stage electric machine is heated by the temperature control modules, it is default that second preset temperature value is less than described first
Temperature value；
When the horizontal stage electric machine is in abnormal operation, and first temperature value in first preset temperature value and
When between the second preset temperature value, the horizontal stage electric machine is restarted.
Optionally, the method further includes：
Cool down the horizontal stage electric machine more than the first duration, alternatively, after being heated beyond the second duration to the horizontal stage electric machine,
Obtain the current second temperature value of the horizontal stage electric machine；
When the second temperature value is between first preset temperature value and second preset temperature value, open again
Move the horizontal stage electric machine.
Optionally, the method further includes：
It is more than first preset temperature value when the horizontal stage electric machine is in abnormal operation and first temperature value
When, alternatively, the horizontal stage electric machine is in abnormal operation and first temperature value when being less than second preset temperature value,
Close monopod video camera.
Optionally, the method further includes：
Cool down the horizontal stage electric machine more than the first duration, alternatively, after being heated beyond the second duration to the horizontal stage electric machine,
Obtain the current second temperature value of the horizontal stage electric machine；
When the second temperature value is between first preset temperature value and second preset temperature value, open again
Move the monopod video camera.
Optionally, described that the horizontal stage electric machine is safeguarded according to the working condition and first temperature value, packet
It includes：
When the horizontal stage electric machine is in normal operating conditions, and first temperature value is more than third preset temperature value,
Reduce the phase current of the horizontal stage electric machine；
When the horizontal stage electric machine is in normal operating conditions, and first temperature value is less than four preset temperature values,
The phase current of the horizontal stage electric machine is increased, the 4th preset temperature value is less than the third preset temperature value.
Optionally, described that the horizontal stage electric machine is safeguarded according to the working condition and first temperature value, packet
It includes：
When the horizontal stage electric machine is in normal operating conditions, and first temperature value is more than third preset temperature value,
Reduce the pace of change of the phase current of the horizontal stage electric machine；
When the horizontal stage electric machine is in normal operating conditions, and first temperature value is less than four preset temperature values,
The pace of change of the phase current of the horizontal stage electric machine is increased, the 4th preset temperature value is less than the third preset temperature value.
Second aspect, provides a kind of horizontal stage electric machine maintenance device, and described device includes：
Determining module, the working condition current for determining horizontal stage electric machine, the working condition be normal operating conditions or
Abnormal operation；
Acquisition module, first temperature value current for obtaining the horizontal stage electric machine；
Maintenance module, for being safeguarded to the horizontal stage electric machine according to the working condition and first temperature value.
Optionally, the determining module, is used for：
The heartbeat signal that horizontal stage electric machine control device is sent is received, the horizontal stage electric machine control device is for controlling the cloud
Platform motor；
When the heartbeat signal is identical as preset normal heartbeat signal, determine that the horizontal stage electric machine is in normal
Working condition；
When the heartbeat signal and the normal heartbeat signal differ, alternatively, being had not been obtained in preset duration described
When heartbeat signal, determine that the horizontal stage electric machine is in abnormal operation.
Optionally, the maintenance module further includes temperature control submodule, and the temperature control submodule is set to described
Around horizontal stage electric machine, the maintenance module is used for：
When the horizontal stage electric machine is in abnormal operation, and first temperature value is more than the first preset temperature value,
Cooled down to the horizontal stage electric machine by the temperature control submodule；
When the horizontal stage electric machine is in abnormal operation, and first temperature value is less than the second preset temperature value,
The horizontal stage electric machine is heated by the temperature control submodule, it is pre- that second preset temperature value is less than described first
If temperature value；
When the horizontal stage electric machine is in abnormal operation, and first temperature value in first preset temperature value and
When between the second preset temperature value, the horizontal stage electric machine is restarted.
Optionally, the temperature control submodule includes fan and heater；The maintenance module, is used for：
When the horizontal stage electric machine is in abnormal operation, and first temperature value is more than first preset temperature value
When, it controls the fan and opens to cool down to the horizontal stage electric machine；
When the horizontal stage electric machine is in abnormal operation, and first temperature value is less than second preset temperature value
When, the heater heating is controlled to be heated to the horizontal stage electric machine.
Optionally, the acquisition module, is additionally operable to：Cool down the horizontal stage electric machine more than the first duration, alternatively, to described
After horizontal stage electric machine is heated beyond the second duration, the current second temperature value of the horizontal stage electric machine is obtained；
Described device further includes restarting module；
It is described to restart module, for presetting temperature in first preset temperature value and described second in the second temperature value
When between angle value, the horizontal stage electric machine is restarted.
Optionally, described device further includes closedown module；
The closedown module is used to be in abnormal operation in the horizontal stage electric machine and first temperature value is more than institute
When stating the first preset temperature value, alternatively, the horizontal stage electric machine is in abnormal operation and first temperature value is less than described
When the second preset temperature value, monopod video camera is closed.
Optionally, the acquisition module, is additionally operable to：Cool down the horizontal stage electric machine more than the first duration, alternatively, to described
After horizontal stage electric machine is heated beyond the second duration, the current second temperature value of the horizontal stage electric machine is obtained；
Described device further includes restarting module；
It is described to restart module, for presetting temperature in first preset temperature value and described second in the second temperature value
When between angle value, the monopod video camera is restarted.
Optionally, the maintenance module, is used for：
When the horizontal stage electric machine is in normal operating conditions, and first temperature value is more than third preset temperature value,
Reduce the phase current of the horizontal stage electric machine；
When the horizontal stage electric machine is in normal operating conditions, and first temperature value is less than four preset temperature values,
The phase current of the horizontal stage electric machine is increased, the 4th preset temperature value is less than the third preset temperature value.
Optionally, the maintenance module, is used for：
When the horizontal stage electric machine is in normal operating conditions, and first temperature value is more than third preset temperature value,
Reduce the pace of change of the phase current of the horizontal stage electric machine；
When the horizontal stage electric machine is in normal operating conditions, and first temperature value is less than four preset temperature values,
The pace of change of the phase current of the horizontal stage electric machine is increased, the 4th preset temperature value is less than the third preset temperature value.
The third aspect, provides a kind of holder, and the holder includes monopod video camera, horizontal stage electric machine, horizontal stage electric machine control
The horizontal stage electric machine maintenance device that device and above-mentioned second aspect provide；
The horizontal stage electric machine is respectively connected with the monopod video camera and the horizontal stage electric machine control device, the holder electricity
Machine maintenance device is respectively connected with the horizontal stage electric machine control device and the monopod video camera；
The monopod video camera is used to adjust the horizontal angle of monopod video camera for shooting monitor video, the horizontal stage electric machine
Degree and pitch angle, the horizontal stage electric machine control device drive the horizontal stage electric machine for controlling.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：
The current working condition of horizontal stage electric machine and the first temperature value are determined by horizontal stage electric machine maintenance device, and according to the work
Make state and the first temperature value safeguards horizontal stage electric machine so that on the one hand, when horizontal stage electric machine is in normal operating conditions
It ensure that horizontal stage electric machine can with high-performance be run in most of temperature range, while also avoiding horizontal stage electric machine and entering exception
Working condition, on the other hand, when horizontal stage electric machine is in abnormal operation, horizontal stage electric machine maintenance device can exclude to lead with itself
The problem of causing horizontal stage electric machine can not work normally is rushed to holder without technical staff and is safeguarded to horizontal stage electric machine with setting up, from
And the flexibility of horizontal stage electric machine maintenance is improved, reduce the maintenance cost of horizontal stage electric machine.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is a kind of structure diagram of holder provided in an embodiment of the present invention.
Fig. 2A is a kind of structure diagram of horizontal stage electric machine maintenance device provided in an embodiment of the present invention.
Fig. 2 B are a kind of structure diagrams of temperature sensor provided in an embodiment of the present invention.
Fig. 3 is a kind of flow chart of the maintaining method of horizontal stage electric machine provided in an embodiment of the present invention.
Fig. 4 is a kind of flow chart of the maintaining method of horizontal stage electric machine provided in an embodiment of the present invention.
Fig. 5 is a kind of structure diagram of horizontal stage electric machine maintenance device provided in an embodiment of the present invention.
Fig. 6 is a kind of structure diagram of maintenance module provided in an embodiment of the present invention.
Fig. 7 is a kind of structure diagram of horizontal stage electric machine maintenance device provided in an embodiment of the present invention.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 1 is a kind of structure diagram of holder provided in an embodiment of the present invention, as shown in Figure 1, the holder may include cloud
Platform video camera 110, horizontal stage electric machine 120, horizontal stage electric machine control device 130 and horizontal stage electric machine maintenance device 140, wherein holder electricity
Machine 120 is respectively connected with monopod video camera 110 and horizontal stage electric machine control device 130, horizontal stage electric machine maintenance device 140 and holder electricity
Machine control device 130 and monopod video camera 110 are respectively connected with.In practical applications, monopod video camera 110 is regarded for shooting monitoring
Frequently, horizontal stage electric machine 120 is used to adjust the level angle and pitch angle of monopod video camera 110, and horizontal stage electric machine control device 130 is used
Horizontal stage electric machine 120 is driven in control, horizontal stage electric machine maintenance device 140 is for safeguarding horizontal stage electric machine 120.
Fig. 2A is a kind of structure diagram of horizontal stage electric machine maintenance device 140 provided in an embodiment of the present invention, as shown in Figure 2 A,
The horizontal stage electric machine maintenance device 140 may include processor 1401, temperature sensor 1402 and temperature control modules 1403,
In, processor 1401 is respectively connected with temperature sensor 1402 and temperature control modules 1403.In practical applications, temperature sensing
Device 1402 can be set to around horizontal stage electric machine 120, the temperature value current for obtaining horizontal stage electric machine 120, and temperature controls mould
Block 1403 can also be set to around horizontal stage electric machine 120, for horizontal stage electric machine 120 to be cooled down or heated.
In one embodiment of the invention, which may include fan and heater, wherein wind
Fan can be set to around horizontal stage electric machine 120, and the air outlet of fan can be directed at horizontal stage electric machine 120, for holder electricity
Machine 120 cools down, and heater can be set on horizontal stage electric machine 120, or, around horizontal stage electric machine 120, for horizontal stage electric machine
120 are heated.In one embodiment of the invention, heater can be set between fan and horizontal stage electric machine 120, this
Sample can open fan and heater simultaneously when needing to heat horizontal stage electric machine 120, using fan that heater is all
The hot-air enclosed blows to horizontal stage electric machine 120, to heat horizontal stage electric machine 120.
As shown in Figure 2 B, in one embodiment of the invention, above-mentioned temperature sensor 1402 may include a resistance
Bleeder circuit, the resistor voltage divider circuit include metalfilmresistor R1 and thermo-sensitive resistor R2, the first end a of the resistor voltage divider circuit with
Logic power connects, and second end b ground connection, third end c is connect with processor 1401, and third end c can be defeated to processor 1401
Go out sampled voltage VCC × R2/ (R1+R2), wherein VCC refers to that the voltage of logic power output, R1 are the electricity of metalfilmresistor
Resistance value, R2 is the resistance value of thermo-sensitive resistor, since the resistance value of thermo-sensitive resistor can change with the variation of temperature, electricity
The sampled voltage of resistance bleeder circuit three-polar output can also change with temperature change.Processor 1401 can be by electric resistance partial pressure
The sampled voltage of circuit input is converted to digital signal via analog-to-digital conversion, and determines that sampled voltage is corresponding according to digital signal
Temperature value.
Fig. 3 is a kind of flow chart of the maintaining method of horizontal stage electric machine shown according to an exemplary embodiment, holder electricity
The maintaining method of machine can be applied in horizontal stage electric machine maintenance device shown in FIG. 1, as shown in figure 3, the maintenance of the horizontal stage electric machine
Method includes the following steps：
Step 301, horizontal stage electric machine maintenance device determine that the current working condition of horizontal stage electric machine, the working condition are normal work
Make state or abnormal operation.
Step 302, horizontal stage electric machine maintenance device obtain the first current temperature value of the horizontal stage electric machine.
Step 303, horizontal stage electric machine maintenance device carry out the horizontal stage electric machine according to the working condition and first temperature value
It safeguards.
In conclusion the maintaining method of horizontal stage electric machine provided in an embodiment of the present invention, true by horizontal stage electric machine maintenance device
Determine the current working condition of horizontal stage electric machine and the first temperature value, and according to the working condition and the first temperature value to horizontal stage electric machine into
Row is safeguarded, can realize the automatic maintenance of horizontal stage electric machine, is safeguarded without technical staff, and the maintenance for improving horizontal stage electric machine is flexible
Property, reduce maintenance cost.
Fig. 4 is a kind of flow chart of the maintaining method of horizontal stage electric machine shown according to an exemplary embodiment, holder electricity
The maintaining method of machine can be applied in horizontal stage electric machine maintenance device shown in FIG. 1, as shown in figure 4, the maintenance of the horizontal stage electric machine
Method includes the following steps：
Step 401, horizontal stage electric machine maintenance device receive the heartbeat signal that horizontal stage electric machine control device is sent.
After horizontal stage electric machine is powered on, horizontal stage electric machine control device can pass through the rotating speed of acquisition horizontal stage electric machine, mutually electricity
Stream etc. monitors the working condition of horizontal stage electric machine in real time, and according to the operational status period of the horizontal stage electric machine of monitoring to holder electricity
Machine maintenance device sends heartbeat signal, and in practical applications, which can be level signal.
Step 402, horizontal stage electric machine maintenance device determine the current working condition of horizontal stage electric machine, the work according to the heartbeat signal
It can be normal operating conditions or abnormal operation to make state.
In practical applications, horizontal stage electric machine maintenance device can determine that horizontal stage electric machine is current according to the heartbeat signal received
Whether normal operating conditions is in.Specifically：When the heartbeat signal received is identical as preset normal heartbeat signal,
Horizontal stage electric machine maintenance device can determine that horizontal stage electric machine is in normal operating conditions, and when the heartbeat signal received and the normal heart
It jumps signal to differ, alternatively, when heartbeat signal has not been obtained in horizontal stage electric machine maintenance device in preset duration, horizontal stage electric machine is safeguarded
Device can determine that horizontal stage electric machine is in abnormal operation.
For example, in practical applications, which can be level signal, and preset normal heartbeat signal can be with
For high level-low level-high level, horizontal stage electric machine control device can be sent every 1 second to horizontal stage electric machine maintenance device should
Heartbeat signal, then when the heartbeat signal received is high level-low level-high level, horizontal stage electric machine maintenance device can be true
The fixed horizontal stage electric machine is in normal operating conditions, when the heartbeat signal received is not high level-low level-high level, or
Person, when not receiving heartbeat signal more than 1 second, horizontal stage electric machine maintenance device can determine that the horizontal stage electric machine is in abnormal work
State.
Step 403, horizontal stage electric machine maintenance device obtain the first current temperature value of the horizontal stage electric machine.
In practical applications, horizontal stage electric machine maintenance device can be obtained by the temperature sensor of itself at regular intervals
The first current temperature value of horizontal stage electric machine.It that is to say that the temperature sensor of horizontal stage electric machine maintenance device can measure horizontal stage electric machine
Temperature.
Step 404, horizontal stage electric machine maintenance device carry out the horizontal stage electric machine according to the working condition and first temperature value
It safeguards.
In practical applications, horizontal stage electric machine maintenance device can be according to the current working condition of horizontal stage electric machine and the first temperature
Value safeguards horizontal stage electric machine.Specifically：
In the first scenario, when horizontal stage electric machine is in abnormal operation, horizontal stage electric machine maintenance device can pass through
Following methods safeguard horizontal stage electric machine：
First way illustrates that the temperature of horizontal stage electric machine is higher when the first temperature value is more than the first preset temperature value, and
The reason of higher temperature is likely to that horizontal stage electric machine is caused to can not work normally, therefore, in this case, horizontal stage electric machine dimension
Protection unit to horizontal stage electric machine can cool down realizing the maintenance to horizontal stage electric machine by the temperature control modules of itself.
In one embodiment of the present of invention, temperature control modules may include fan, then when the first temperature value is more than the first preset temperature
When value, horizontal stage electric machine maintenance device can start fan and cool down to horizontal stage electric machine.
The second way illustrates that the temperature of horizontal stage electric machine is relatively low when the first temperature value is less than the second preset temperature value, and
The reason of lower temperature is likely to that horizontal stage electric machine is caused to can not work normally, therefore, in this case, horizontal stage electric machine dimension
Protection unit to horizontal stage electric machine can heat realizing the maintenance to horizontal stage electric machine by the temperature control modules of itself.
In one embodiment of the present of invention, temperature control modules may include heater, then when the first temperature value is less than the second default temperature
When angle value, horizontal stage electric machine maintenance device can start heater and be heated to horizontal stage electric machine.It is of course also possible, as described before, in temperature
In the case that control module further includes fan, which can be set between fan and horizontal stage electric machine, and the outlet air of fan
Mouth alignment horizontal stage electric machine, in this case, horizontal stage electric machine maintenance device can start fan and heater simultaneously, will using fan
Hot-air near heater blows to horizontal stage electric machine to be heated to horizontal stage electric machine.
The third mode, when the first temperature value is between the first preset temperature value and the second preset temperature value, explanation is led
The reason of causing horizontal stage electric machine can not work normally not is the too high or too low for temperature of horizontal stage electric machine, therefore, in this case,
What horizontal stage electric machine maintenance device can exclude the horizontal stage electric machine is caused to can not work normally by restarting horizontal stage electric machine asks
Topic.Specifically, the processor in horizontal stage electric machine maintenance device can send instruction of restarting to horizontal stage electric machine control device, with by cloud
Platform motor control assembly drives the horizontal stage electric machine to restart.
It should be noted that above-mentioned first preset temperature value and the second preset temperature value can be by technical staff according to holder
Type, performance of motor etc. are set, and in practical applications, which is more than the second preset temperature value, the
One preset temperature value can be 10 DEG C, and the second preset temperature value can be -10 DEG C, and the embodiment of the present invention does not do this specific limit
It is fixed.
It should also be noted that, when horizontal stage electric machine is in abnormal operation, horizontal stage electric machine maintenance device can close
Horizontal stage electric machine control device and horizontal stage electric machine, to prevent horizontal stage electric machine control device and the horizontal stage electric machine work under abnormal operation
Make to generate irreversible damage.Further, since in practical applications, start-up temperature control module can consume more electric energy, be
Ensure that the normal of temperature control modules starts and normal operation, in one embodiment of the invention, when above-mentioned first temperature
Value is more than the first preset temperature value, alternatively, when the first temperature value is less than the second preset temperature value, horizontal stage electric machine maintenance device can be with
Close monopod video camera, and the start-up temperature control module after closing the monopod video camera.
It should also be noted that, in practical applications, when horizontal stage electric machine maintenance device cools down more than first to horizontal stage electric machine
Duration, alternatively, after being heated beyond the second duration to horizontal stage electric machine, the temperature of horizontal stage electric machine is likely to be in the first default temperature
It between angle value and the second preset temperature value, that is to say, horizontal stage electric machine maintenance device, which is likely to eliminate, leads to horizontal stage electric machine
The problem of can not work normally.At this point, horizontal stage electric machine maintenance device can obtain the current second temperature value of horizontal stage electric machine, and
When the second temperature value is between the first preset temperature value and the second preset temperature value, opened again by horizontal stage electric machine control device
Dynamic horizontal stage electric machine, in practical applications, if closing monopod video camera before horizontal stage electric machine is heated or cooled down, holder is electric at this time
Machine maintenance device can also restart the monopod video camera.In practical applications, above-mentioned first duration and the second duration can be by skills
Art personnel set according to actual conditions, and the embodiment of the present invention is not specifically limited this.
It should also be noted that, in practical applications, if horizontal stage electric machine maintenance device determines holder electricity in preset duration
The number that machine is in abnormal operation is more than preset times, alternatively, the number for restarting horizontal stage electric machine in preset duration is more than
When preset times, illustrate that horizontal stage electric machine or horizontal stage electric machine control device are likely to produce irreversible damage, at this time cloud
Platform maintenance of motor device can not continue to execute the several ways described above safeguarded to horizontal stage electric machine.The present invention's
In one embodiment, horizontal stage electric machine maintenance device can also have communication function, in this case, horizontal stage electric machine maintenance device
While not continuing to execute the several ways described above safeguarded to horizontal stage electric machine, can also to destination server or
Target terminal sends external restoration information, is manually repaired or replaced horizontal stage electric machine and horizontal stage electric machine control dress with notification technique personnel
It sets.
By horizontal stage electric machine maintenance device when horizontal stage electric machine is in abnormal operation according to horizontal stage electric machine it is current the
One temperature value safeguards horizontal stage electric machine so that holder can exclude cause what horizontal stage electric machine can not work normally to ask with itself
Topic is rushed to holder without technical staff and is safeguarded to horizontal stage electric machine with setting up, to improve the flexible of horizontal stage electric machine maintenance
Property, reduce the maintenance cost of horizontal stage electric machine.
In the latter case, when horizontal stage electric machine is in normal operating conditions, horizontal stage electric machine maintenance device can pass through
Following methods safeguard horizontal stage electric machine：
First way, when the first temperature value is more than third preset temperature value, need to avoid the temperature of horizontal stage electric machine into
The rising of one step causes horizontal stage electric machine can not work normally, at this point, horizontal stage electric machine maintenance device can reduce the phase electricity of horizontal stage electric machine
Stream, and/or, the pace of change of the phase current of the horizontal stage electric machine is reduced, to reduce the heat that horizontal stage electric machine itself distributes at work
Amount.Specifically, multigroup temperature value and phase current and phase current can be stored in the processor in horizontal stage electric machine maintenance device
The mapping relations of pace of change, horizontal stage electric machine maintenance device can inquire the corresponding phase of the first temperature value from above-mentioned mapping relations
Electric current, and/or, the pace of change of phase current, and the phase current sent a query to horizontal stage electric machine control device, and/or, it is mutually electric
The pace of change of stream, with by horizontal stage electric machine control device according to the phase current, and/or, the pace of change of phase current controls holder
Motor, to realize the phase current for reducing horizontal stage electric machine, and/or, phase current change rate.
The second way, when the first temperature value is less than four preset temperature values, need to avoid the temperature of horizontal stage electric machine into
The decline of one step causes horizontal stage electric machine can not work normally, at this point, horizontal stage electric machine maintenance device can increase the phase electricity of horizontal stage electric machine
Stream, and/or, the pace of change of the phase current of the horizontal stage electric machine is increased, to increase the heat that horizontal stage electric machine itself distributes at work
Amount.Specifically, multigroup temperature value and phase current and phase current can be stored in the processor in horizontal stage electric machine maintenance device
The mapping relations of pace of change, horizontal stage electric machine maintenance device can inquire the corresponding phase of the first temperature value from above-mentioned mapping relations
Electric current, and/or, the pace of change of phase current, and the phase current sent a query to horizontal stage electric machine control device, and/or, it is mutually electric
The pace of change of stream, with by horizontal stage electric machine control device according to the phase current, and/or, the pace of change of phase current controls holder
Motor, to realize the phase current for increasing horizontal stage electric machine, and/or, phase current change rate.
It should be noted that above-mentioned third preset temperature value and the 4th preset temperature value can be by technical staff according to holder
Type, performance of motor etc. are set, and in practical applications, which is more than the 4th preset temperature value,
The third preset temperature value can be 40 DEG C, and the 4th preset temperature value can be -20 DEG C, and the embodiment of the present invention, which does not do this, to be had
Body limits.
By electric to holder according to the first current temperature value of horizontal stage electric machine when horizontal stage electric machine is in normal operating conditions
The phase current of machine and the pace of change of phase current are adjusted so that in higher temperature or lower temperature, horizontal stage electric machine can be with
Abnormal operation is avoided enter by sacrificing a part of performance, and in proper temperature, horizontal stage electric machine can with high-performance
On the other hand operation also keeps away on the one hand ensure that horizontal stage electric machine can with high-performance be run in most of temperature range
Exempt from horizontal stage electric machine and enters abnormal operation.
In practical applications, horizontal stage electric machine maintenance device after horizontal stage electric machine is powered in addition to that can be based on horizontal stage electric machine
Working condition and the first temperature value horizontal stage electric machine is safeguarded in above-described two kinds of, can also be in holder
Horizontal stage electric machine is safeguarded according to the first temperature value of horizontal stage electric machine when motor is just powered, specifically：
In practical applications, when horizontal stage electric machine is just powered, horizontal stage electric machine control device and horizontal stage electric machine may be also
Not starting operation, temperature is relatively low at this time can cause horizontal stage electric machine control device and horizontal stage electric machine not to start normally, therefore, when
When horizontal stage electric machine maintenance device determines that first temperature value is less than five preset temperature values, horizontal stage electric machine maintenance device can start
Temperature control modules heat horizontal stage electric machine.In addition, in some cases, horizontal stage electric machine may experienced restart after just
It is powered, at this point, horizontal stage electric machine control device may work, longer period of time is this to distribute more heat
In the case of need to avoid heat further accumulate cause temperature excessively high so that cause horizontal stage electric machine or horizontal stage electric machine control device without
Method works normally, at this point, horizontal stage electric machine maintenance device can cool down to horizontal stage electric machine with start-up temperature control module.
In conclusion the maintaining method of horizontal stage electric machine provided in an embodiment of the present invention, true by horizontal stage electric machine maintenance device
Determine the current working condition of horizontal stage electric machine and the first temperature value, and according to the working condition and the first temperature value to horizontal stage electric machine into
Row is safeguarded so that on the one hand, ensure that horizontal stage electric machine in most of temperature range when horizontal stage electric machine is in normal operating conditions
It is interior with high-performance to run, while also avoiding horizontal stage electric machine and entering abnormal operation, on the other hand, at horizontal stage electric machine
When abnormal operation, horizontal stage electric machine maintenance device can with itself exclude cause horizontal stage electric machine can not work normally the problem of,
Holder is rushed to without technical staff to safeguard horizontal stage electric machine with setting up, to improve the flexibility of horizontal stage electric machine maintenance,
Reduce the maintenance cost of horizontal stage electric machine.
Fig. 5 is a kind of structure diagram of horizontal stage electric machine maintenance device 500 shown according to an exemplary embodiment, the holder
Maintenance of motor device 500 includes：Determining module 501, acquisition module 502 and maintenance module 503.
The determining module 501, the working condition current for determining horizontal stage electric machine, the working condition are normal operating conditions
Or abnormal operation.
The acquisition module 502, first temperature value current for obtaining the horizontal stage electric machine.
The maintenance module 503, for being safeguarded to the horizontal stage electric machine according to the working condition and first temperature value.
In one embodiment of the invention, the determining module 501, is used for：Receive what horizontal stage electric machine control device was sent
Heartbeat signal, the horizontal stage electric machine control device is for controlling the horizontal stage electric machine；When the heartbeat signal and the preset normal heart
When jump signal is identical, determine that the horizontal stage electric machine is in normal operating conditions；When the heartbeat signal and the normal heartbeat signal not phase
Together, alternatively, when the heartbeat signal having not been obtained in preset duration, determine that the horizontal stage electric machine is in abnormal operation.
As shown in fig. 6, in one embodiment of the invention, which further includes temperature control submodule
5031, which is set to around the horizontal stage electric machine, which is used for：When holder electricity
Machine is in abnormal operation, and when first temperature value is more than the first preset temperature value, passes through the temperature control submodule
5031 pairs of horizontal stage electric machines cool down；When the horizontal stage electric machine is in abnormal operation, and first temperature value is less than second
When preset temperature value, the horizontal stage electric machine is heated by the temperature control submodule 5031, second preset temperature value is small
In first preset temperature value；When the horizontal stage electric machine is in abnormal operation, and first temperature value is in the first default temperature
When between angle value and the second preset temperature value, the horizontal stage electric machine is restarted.
In one embodiment of the invention, which includes fan and heater；The maintenance mould
Block 503, is used for：When the horizontal stage electric machine is in abnormal operation, and first temperature value is more than first preset temperature value,
The fan is controlled to open to cool down to the horizontal stage electric machine；When the horizontal stage electric machine is in abnormal operation, and first temperature
When angle value is less than second preset temperature value, heater heating is controlled to be heated to the horizontal stage electric machine.
It should be noted that fan can be set to around horizontal stage electric machine, and the air outlet of fan can be directed at holder
Motor, for cooling down to horizontal stage electric machine, heater can be set on horizontal stage electric machine, or, around horizontal stage electric machine, for pair
Horizontal stage electric machine is heated.In one embodiment of the invention, heater can be set between fan and horizontal stage electric machine, this
Sample can open fan and heater simultaneously when needing to heat horizontal stage electric machine, will be around heater using fan
Hot-air blows to horizontal stage electric machine, to heat horizontal stage electric machine.
In one embodiment of the invention, the maintenance module 503, is used for：When the horizontal stage electric machine is in normal work shape
State, and first temperature value be more than third preset temperature value when, reduce the phase current of the horizontal stage electric machine；When the horizontal stage electric machine is in
Normal operating conditions, and when first temperature value is less than four preset temperature values, increase the phase current of the horizontal stage electric machine, the 4th
Preset temperature value is less than the third preset temperature value.
In one embodiment of the invention, the maintenance module 503, is used for：When the horizontal stage electric machine is in normal work shape
State, and first temperature value be more than third preset temperature value when, reduce the pace of change of the phase current of the horizontal stage electric machine；When the cloud
Platform motor is in normal operating conditions, and when first temperature value is less than four preset temperature values, increases the phase of the horizontal stage electric machine
The pace of change of electric current, the 4th preset temperature value are less than the third preset temperature value.
Fig. 7 is the structure diagram of another horizontal stage electric machine maintenance device 700 shown according to an exemplary embodiment, is such as schemed
Shown in 7, which can also wrap other than each module for including comprising horizontal stage electric machine maintenance device 500
It includes and restarts module 504 and closedown module 505.
In one embodiment of the invention, the acquisition module 502, is additionally operable to：Cool down the horizontal stage electric machine more than first
Duration obtains the current second temperature value of the horizontal stage electric machine alternatively, after being heated beyond the second duration to the horizontal stage electric machine.
This restarts module 504, is used in the second temperature value in first preset temperature value and second preset temperature value
Between when, restart the horizontal stage electric machine.
The closedown module 505, for the horizontal stage electric machine be in abnormal operation and first temperature value more than this
When one preset temperature value, alternatively, the horizontal stage electric machine is in abnormal operation and first temperature value is less than the second default temperature
When angle value, monopod video camera is closed.
This restarts module 504, is additionally operable in the second temperature value in first preset temperature value and second preset temperature
When between value, the monopod video camera is restarted.
In conclusion horizontal stage electric machine maintenance device provided in an embodiment of the present invention, the work current by determining horizontal stage electric machine
Make state and the first temperature value, and horizontal stage electric machine is safeguarded according to the working condition and the first temperature value so that on the one hand,
It ensure that horizontal stage electric machine can with high-performance be run in most of temperature range when horizontal stage electric machine is in normal operating conditions,
Also avoiding horizontal stage electric machine enters abnormal operation simultaneously, on the other hand, when horizontal stage electric machine is in abnormal operation, cloud
The problem of platform maintenance of motor device with itself can exclude that horizontal stage electric machine is caused to can not work normally, holder is rushed to without technical staff
It sets up ground to safeguard horizontal stage electric machine, to improve the flexibility of horizontal stage electric machine maintenance, reduces the maintenance of horizontal stage electric machine
Cost.
An embodiment of the present invention provides a kind of horizontal stage electric machine maintenance devices, please refer to Fig.2 A, the horizontal stage electric machine maintenance device
May include processor 1401, temperature sensor 1402 and temperature control modules 1403, wherein：
The processor 1401, for executing above-mentioned steps 401,402 and 404.
The temperature sensor 1402 is additionally operable to for executing the technical process for obtaining the first temperature value in above-mentioned steps 403
First temperature value is sent in processor 1401.
The temperature control modules 1403, for executing above-mentioned steps 404 under the control of processor 1401.
In conclusion horizontal stage electric machine maintenance device provided in an embodiment of the present invention, the work current by determining horizontal stage electric machine
Make state and the first temperature value, and horizontal stage electric machine is safeguarded according to the working condition and the first temperature value so that on the one hand,
It ensure that horizontal stage electric machine can with high-performance be run in most of temperature range when horizontal stage electric machine is in normal operating conditions,
Also avoiding horizontal stage electric machine enters abnormal operation simultaneously, on the other hand, when horizontal stage electric machine is in abnormal operation, cloud
The problem of platform maintenance of motor device with itself can exclude that horizontal stage electric machine is caused to can not work normally, holder is rushed to without technical staff
It sets up ground to safeguard horizontal stage electric machine, to improve the flexibility of horizontal stage electric machine maintenance, reduces the maintenance of horizontal stage electric machine
Cost.
The present invention provides a kind of holders, referring to FIG. 1, the holder may include monopod video camera 110, horizontal stage electric machine
120, horizontal stage electric machine control device 130 and horizontal stage electric machine maintenance device 140, wherein：
The horizontal stage electric machine maintenance device 140, for executing the step that holder maintenance of motor device executes in embodiment illustrated in fig. 4
Suddenly.
In conclusion holder provided in an embodiment of the present invention, determines that horizontal stage electric machine is current by horizontal stage electric machine maintenance device
Working condition and the first temperature value, and horizontal stage electric machine is safeguarded according to the working condition and the first temperature value so that one
Aspect ensure that horizontal stage electric machine can with high-performance in most of temperature range when horizontal stage electric machine is in normal operating conditions
Operation, while also avoiding horizontal stage electric machine and entering abnormal operation, on the other hand, abnormal operation is in horizontal stage electric machine
When, horizontal stage electric machine maintenance device can with itself exclude cause horizontal stage electric machine can not work normally the problem of, caught up with without technical staff
Horizontal stage electric machine is safeguarded with setting up to holder, to improve the flexibility of horizontal stage electric machine maintenance, reduces horizontal stage electric machine
Maintenance cost.
It should be noted that：Above-described embodiment provide horizontal stage electric machine maintenance device when safeguarding horizontal stage electric machine, only more than
The division progress of each function module is stated for example, in practical application, it can be as needed and by above-mentioned function distribution by difference
Function module complete, i.e., the internal structure of device is divided into different function modules, with complete it is described above whole or
Person's partial function.In addition, the maintaining method embodiment category for the horizontal stage electric machine maintenance device and horizontal stage electric machine that above-described embodiment provides
In same design, specific implementation process refers to embodiment of the method, and which is not described herein again.
Term "and/or" in the present invention, only a kind of incidence relation of description affiliated partner, indicates may exist three kinds
Relationship, for example, A and/or B, can indicate：Individualism A exists simultaneously A and B, these three situations of individualism B.In addition, this
Character "/" in text, it is a kind of relationship of "or" to typically represent forward-backward correlation object.
One of ordinary skill in the art will appreciate that realizing that all or part of step of above-described embodiment can pass through hardware
It completes, relevant hardware can also be instructed to complete by program, the program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (18)
1. a kind of maintaining method of horizontal stage electric machine, which is characterized in that be applied in horizontal stage electric machine maintenance device, the method packet
It includes：
Determine that the current working condition of horizontal stage electric machine, the working condition are normal operating conditions or abnormal operation；
Obtain the first current temperature value of the horizontal stage electric machine；
The horizontal stage electric machine is safeguarded according to the working condition and first temperature value.
2. according to the method described in claim 1, it is characterized in that, the current working condition of the determining horizontal stage electric machine, including：
The heartbeat signal that horizontal stage electric machine control device is sent is received, the horizontal stage electric machine control device is for controlling the holder electricity
Machine；
When the heartbeat signal is identical as preset normal heartbeat signal, determine that the horizontal stage electric machine is in normal work
State；
When the heartbeat signal and the normal heartbeat signal differ, alternatively, the heartbeat has not been obtained in preset duration
When signal, determine that the horizontal stage electric machine is in abnormal operation.
3. according to the method described in claim 1, it is characterized in that, described according to the working condition and first temperature value
The horizontal stage electric machine is safeguarded, including：
When the horizontal stage electric machine is in abnormal operation, and first temperature value is more than the first preset temperature value, pass through
The temperature control modules being arranged around the horizontal stage electric machine cool down to the horizontal stage electric machine；
When the horizontal stage electric machine is in abnormal operation, and first temperature value is less than the second preset temperature value, pass through
The temperature control modules heat the horizontal stage electric machine, and second preset temperature value is less than first preset temperature
Value；
When the horizontal stage electric machine is in abnormal operation, and first temperature value is in first preset temperature value and second
When between preset temperature value, the horizontal stage electric machine is restarted.
4. according to the method described in claim 3, it is characterized in that, the method further includes：
Cool down the horizontal stage electric machine more than the first duration, alternatively, after being heated beyond the second duration to the horizontal stage electric machine, obtains
The current second temperature value of the horizontal stage electric machine；
When the second temperature value is between first preset temperature value and second preset temperature value, institute is restarted
State horizontal stage electric machine.
5. according to the method described in claim 3, it is characterized in that, the method further includes：
When the horizontal stage electric machine is in abnormal operation and first temperature value is more than first preset temperature value, or
When person, the horizontal stage electric machine are in abnormal operation and first temperature value and are less than second preset temperature value, close
Monopod video camera.
6. according to the method described in claim 5, it is characterized in that, the method further includes：
Cool down the horizontal stage electric machine more than the first duration, alternatively, after being heated beyond the second duration to the horizontal stage electric machine, obtains
The current second temperature value of the horizontal stage electric machine；
When the second temperature value is between first preset temperature value and second preset temperature value, institute is restarted
State monopod video camera.
7. according to the method described in claim 1, it is characterized in that, described according to the working condition and first temperature value
The horizontal stage electric machine is safeguarded, including：
When the horizontal stage electric machine is in normal operating conditions, and first temperature value is more than third preset temperature value, reduce
The phase current of the horizontal stage electric machine；
When the horizontal stage electric machine is in normal operating conditions, and first temperature value is less than four preset temperature values, increase
The phase current of the horizontal stage electric machine, the 4th preset temperature value are less than the third preset temperature value.
8. according to the method described in claim 1, it is characterized in that, described according to the working condition and first temperature value
The horizontal stage electric machine is safeguarded, including：
When the horizontal stage electric machine is in normal operating conditions, and first temperature value is more than third preset temperature value, reduce
The pace of change of the phase current of the horizontal stage electric machine；
When the horizontal stage electric machine is in normal operating conditions, and first temperature value is less than four preset temperature values, increase
The pace of change of the phase current of the horizontal stage electric machine, the 4th preset temperature value are less than the third preset temperature value.
9. a kind of horizontal stage electric machine maintenance device, which is characterized in that described device includes：
Determining module, the working condition current for determining horizontal stage electric machine, the working condition are normal operating conditions or exception
Working condition；
Acquisition module, first temperature value current for obtaining the horizontal stage electric machine；
Maintenance module, for being safeguarded to the horizontal stage electric machine according to the working condition and first temperature value.
10. device according to claim 9, which is characterized in that the determining module is used for：
The heartbeat signal that horizontal stage electric machine control device is sent is received, the horizontal stage electric machine control device is for controlling the holder electricity
Machine；
When the heartbeat signal is identical as preset normal heartbeat signal, determine that the horizontal stage electric machine is in normal work
State；
When the heartbeat signal and the normal heartbeat signal differ, alternatively, the heartbeat has not been obtained in preset duration
When signal, determine that the horizontal stage electric machine is in abnormal operation.
11. device according to claim 9, which is characterized in that the maintenance module further includes temperature control submodule, institute
It states temperature control submodule to be set to around the horizontal stage electric machine, the maintenance module is used for：
When the horizontal stage electric machine is in abnormal operation, and first temperature value is more than the first preset temperature value, pass through
The temperature control submodule cools down to the horizontal stage electric machine；
When the horizontal stage electric machine is in abnormal operation, and first temperature value is less than the second preset temperature value, pass through
The temperature control submodule heats the horizontal stage electric machine, and second preset temperature value is less than the described first default temperature
Angle value；
When the horizontal stage electric machine is in abnormal operation, and first temperature value is in first preset temperature value and second
When between preset temperature value, the horizontal stage electric machine is restarted.
12. according to the devices described in claim 11, which is characterized in that the temperature control submodule includes fan and heating
Device；The maintenance module, is used for：
When the horizontal stage electric machine is in abnormal operation, and first temperature value is more than first preset temperature value,
The fan is controlled to open to cool down to the horizontal stage electric machine；
When the horizontal stage electric machine is in abnormal operation, and first temperature value is less than second preset temperature value,
The heater heating is controlled to be heated to the horizontal stage electric machine.
13. according to the devices described in claim 11, which is characterized in that the acquisition module is additionally operable to：To the horizontal stage electric machine
Cooling is more than the first duration, alternatively, after being heated beyond the second duration to the horizontal stage electric machine, obtains the horizontal stage electric machine currently
Second temperature value；
Described device further includes restarting module；
It is described to restart module, it is used in the second temperature value in first preset temperature value and second preset temperature value
Between when, restart the horizontal stage electric machine.
14. according to the devices described in claim 11, which is characterized in that described device further includes closedown module；
The closedown module, for be in abnormal operation and first temperature value more than described the in the horizontal stage electric machine
When one preset temperature value, alternatively, the horizontal stage electric machine is in abnormal operation and first temperature value is less than described second
When preset temperature value, monopod video camera is closed.
15. device according to claim 14, which is characterized in that the acquisition module is additionally operable to：To the horizontal stage electric machine
Cooling is more than the first duration, alternatively, after being heated beyond the second duration to the horizontal stage electric machine, obtains the horizontal stage electric machine currently
Second temperature value；
Described device further includes restarting module；
It is described to restart module, it is used in the second temperature value in first preset temperature value and second preset temperature value
Between when, restart the monopod video camera.
16. device according to claim 9, which is characterized in that the maintenance module is used for：
When the horizontal stage electric machine is in normal operating conditions, and first temperature value is more than third preset temperature value, reduce
The phase current of the horizontal stage electric machine；
When the horizontal stage electric machine is in normal operating conditions, and first temperature value is less than four preset temperature values, increase
The phase current of the horizontal stage electric machine, the 4th preset temperature value are less than the third preset temperature value.
17. device according to claim 9, which is characterized in that the maintenance module is used for：
When the horizontal stage electric machine is in normal operating conditions, and first temperature value is more than third preset temperature value, reduce
The pace of change of the phase current of the horizontal stage electric machine；
When the horizontal stage electric machine is in normal operating conditions, and first temperature value is less than four preset temperature values, increase
The pace of change of the phase current of the horizontal stage electric machine, the 4th preset temperature value are less than the third preset temperature value.
18. a kind of holder, which is characterized in that the holder include monopod video camera, horizontal stage electric machine, horizontal stage electric machine control device and
Horizontal stage electric machine maintenance device as described in claim 9-17 is any；
The horizontal stage electric machine is respectively connected with the monopod video camera and the horizontal stage electric machine control device, the horizontal stage electric machine dimension
Protection unit is respectively connected with the horizontal stage electric machine control device and the monopod video camera；
The monopod video camera for shooting monitor video, the horizontal stage electric machine be used to adjust monopod video camera level angle and
Pitch angle, the horizontal stage electric machine control device drive the horizontal stage electric machine for controlling.
Priority Applications (1)
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| CN201710192591.0A CN108664051A (en) | 2017-03-28 | 2017-03-28 | Maintaining method, device and the holder of horizontal stage electric machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710192591.0A CN108664051A (en) | 2017-03-28 | 2017-03-28 | Maintaining method, device and the holder of horizontal stage electric machine |
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Family
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| CN201710192591.0A Pending CN108664051A (en) | 2017-03-28 | 2017-03-28 | Maintaining method, device and the holder of horizontal stage electric machine |
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Cited By (1)
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