CN109612750A - A kind of worm and gear lifting apparatus test device and its control method - Google Patents
A kind of worm and gear lifting apparatus test device and its control method Download PDFInfo
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- CN109612750A CN109612750A CN201811273883.8A CN201811273883A CN109612750A CN 109612750 A CN109612750 A CN 109612750A CN 201811273883 A CN201811273883 A CN 201811273883A CN 109612750 A CN109612750 A CN 109612750A
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- stepper motor
- driving device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a kind of worm and gears to go up and down apparatus test device, comprising: test platform, the test platform are configured at fixed worm and gear elevator；Driving device, the driving device include first driving device and the second driving device；First driving device, the first driving device are used to provide driving force to the worm gear of the worm and gear elevator；Second driving device, second driving device are used to provide loading force to the lead screw of the worm and gear elevator；Control mechanism, the control mechanism is for controlling the first driving device output driving power, and the control mechanism is for controlling the second driving device output loads power.
Description
Technical field
The present invention relates to industrial automation testing fields, and in particular, to a kind of worm and gear lifting apparatus test device and
Its control method.
Background technique
In order to test the performance of worm and gear elevator, needs to simulate actual condition, multiposition control, length are carried out to product
The life test of time operation.Currently, the control device tested for elevator, the degree of automation is low, narrow application range.
First is that needing that a variety of loading forces under simulation operating condition are adjusted manually.Second is that test speed is constant speed.Third is that needing to operate
Person monitors test product for a long time.Fourth is that a kind of device is only tested with a set of product.It is not only cumbersome, it is right
Manpower also results in great waste.
Summary of the invention
It is an object of the invention to overcome the defect of existing equipment, providing one kind can " key, foolproof " automation behaviour
To make, the scope of application is wide, realizes the step-less adjustment of output loads, test speed, the synchronism detection for more covering elevator product can be carried out,
And worm and gear lifting apparatus test device and its control method with monitoring temperature, pressure monitoring function.
The technical solution for realizing the aim of the invention is as follows: a kind of worm and gear lifting apparatus test device, which is characterized in that
It include: test platform, the test platform is configured at fixed worm and gear elevator；Driving device, the driving device include
First driving device and the second driving device；First driving device, the first driving device are used for the worm and gear liter
The worm gear of drop machine provides driving force；Second driving device, second driving device are used for the worm and gear elevator
Lead screw provides loading force；Control mechanism, the control mechanism is for controlling the first driving device output driving power, the control
Mechanism processed is for controlling the second driving device output loads power.
Further, control mechanism includes several first interfaces connecting with the first driving device, for receiving
The information of the first driving device；The control mechanism includes several second connecing of connecting with second driving device
Mouthful.
Further, the first driving device includes stepper motor and gear assembly, and the stepper motor passes through
Gear assembly is connect with the worm gear of the worm and gear elevator；Second driving device include hydraulic cylinder, overflow valve,
Reversal valve, pump machine, pressure sensor, water cooler and fluid pressure line, the hydraulic stem of the hydraulic cylinder and the worm and gear are gone up and down
The lead screw of machine connects.
Further, including for sensing stepper motor temperature the first temperature sensor, for sensing hydraulic fluid temperature
Second temperature sensor and pressure sensor for sensing fluid pressure line oil circuit pressure.
Further, the control mechanism includes MCU controller and PLC controller, and the MCU controller controls the step
Into motor, the speed of service is provided for the worm and gear elevator；The PLC controller respectively with the pressure sensor, institute
The first temperature sensor, second temperature sensor, the overflow valve, the reversal valve, the pump machine is stated to be electrically connected.
Further, control mechanism further includes programmable touch screen, the programmable touch screen and the MCU controller and
The PLC controller connection, is controlled by the human-computer interaction interface of programmable touch screen to the MCU controller and the PLC
Controller sends instruction.
In addition, the present invention also provides a kind of control methods of worm and gear lifting apparatus test device comprising above-mentioned
Turbine and worm goes up and down apparatus test device, further comprising the steps of:
Parameter preset, the parameter are preset including the first pre-set velocity, the first preset strokes, the first preset time, first
Loading force, the first preset temperature, the first default temperature rise speed, the first limiting temperature, the second limiting temperature, hydraulic cylinder playback pressure
Value and pressure limit value；
The judgement of analog quantity off-line state is carried out, alarm if offline and waits confirmation operation, if controlling hydraulic cylinder online
Hydraulic cylinder homing action is completed with hydraulic cylinder playback pressure value, pump machine is closed, and confirmed, is sequentially completed closing overflow
Valve, reversal valve simultaneously confirm, whether check current stepper motor temperature, hydraulic fluid temperature and fluid pressure line oil circuit pressure default
Range；
Control stepper motor is run with the first pre-set velocity, when the stepper motor stroke the first preset strokes of arrival are subsequent
The first preset time of reforwarding row；
It controls the stepper motor to run with the first pre-set velocity, controls the hydraulic cylinder and export the first predetermined load power,
After the stepper motor stroke reaches the second preset strokes, the hydraulic cylinder suspension work, the stepper motor is continued to run
Second preset time；
It controls the stepper motor to run with the second pre-set velocity, controls the hydraulic cylinder and export the second predetermined load power,
After the stepper motor stroke reaches third preset strokes, the hydraulic cylinder suspension work, the stepper motor is continued to run
Third preset time；
The stepper motor is controlled with the operation of third pre-set velocity, controls the hydraulic cylinder output third predetermined load power,
After the stepper motor stroke reaches four preset strokes, the stepper motor continues to run the 4th preset time, subsequent institute
It states stepper motor and the hydraulic cylinder stops working；
In above step, when the temperature rise speed that the temperature of hydraulic oil is more than the first preset temperature or hydraulic oil is more than first
When default temperature rise speed, water cooler is opened；When the temperature of the hydraulic oil is more than the first limiting temperature, the worm and gear liter
Drop apparatus test device stops working；When the oil circuit pressure of hydraulic pipeline is more than pressure limit value, the worm and gear elevator
Test device stops working；When the stepper motor temperature is more than the second Limit temperature value, the worm and gear elevator is surveyed
Trial assembly, which is set, to stop working.
Further, the first pre-set velocity > second pre-set velocity > third pre-set velocity, first predetermined load
Power < the second predetermined load power < third predetermined load power.
Further, the first preset strokes=second preset strokes=third preset strokes=the 4th preset strokes, first
Preset time=the second preset time=third preset time=the 4th preset time.
The invention has the benefit that
1, device has hand/automatic 2 kinds of operation modes, can be used manager's identity man-machine right in the debugging manually of touch screen
Interface is talked about, realizes and the stepless changing of parameter is arranged.
2, auto test flow operating in a key realizes the streamlined management of product test.More set product tests can be simultaneously
It carries out, saves manpower and time.
3, moment tracking and monitoring system parameter judges automatically the numerical value that whether reaches capacity, and makes anticipation to succeeding state,
Execution is handled in the case where unresponsive.
4, control cabinet saves installation space using the dismountable splicing structure in four sides.
5, it is docked using connector group with hydraulic strip mounted mechanism and test platform, it is versatile, easy to operate.
6, different parameters are handled using different type controller, can quickly searches failure cause, when reducing troubleshooting
Between.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings:
Fig. 1 shows a kind of structural schematic diagram of worm and gear lifting apparatus test device；
Fig. 2 shows a kind of another structural schematic diagrams of worm and gear lifting apparatus test device；
Fig. 3 shows a kind of flow chart of the control method of worm and gear lifting apparatus test device.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
As shown in Figs. 1-2, a kind of worm and gear goes up and down apparatus test device, is used to test worm and gear elevator.It is wrapped
Include the test platform driving device for being configured at fixed worm and gear elevator；Driving device includes that first driving device and second drive
Dynamic device, wherein first driving device is used to provide driving force to the worm gear of worm and gear elevator, and the second driving device is used for
Loading force is provided to the lead screw of the worm and gear elevator；Control mechanism, control mechanism are defeated for controlling first driving device
Driving force out, control mechanism is for controlling the second driving device output loads power.Specifically, control mechanism includes programmable touch
If screen 1, test platform external interface 2, hydraulic system external interface 3, supplying power for outside interface 4, setting and control mechanism bottom
Dry universal wheel 5, the hanging ring 6 being set at the top of control mechanism, control cabinet, PLC controller 7, stepper motor driver 8, conversion
Power supply group 9, MCU controller 10, relay group 11, signal amplifier group 12.
Specifically, test platform external interface 2 is connect with first driving device, first driving device include stepper motor and
Gear assembly, stepper motor are connect by gear assembly with the worm gear of worm and gear elevator, and stepper motor passes through
Gear assembly drives elevator to move back and forth, and realizes platform test speed and test by the control to stepper motor
Run-length management.In this embodiment, test platform external interface 2 can at most dock 4 sets of first driving devices and carry out pipe to it
Reason.
Specifically, hydraulic system external interface 3 is attached with the second driving device, and the second driving device includes hydraulic
Cylinder, 25MPa overflow valve, reversal valve, 1.5KW pump machine, pressure sensor, water cooler and fluid pressure line, the hydraulic cylinder of hydraulic cylinder with
The lead screw of worm and gear elevator connects.In this embodiment, hydraulic system external interface can at most dock 4 set of second driving dress
It sets and controls it.Wherein 4 set of second driving device can share a fuel tank.
Further, conversion electric power group 9 and supplying power for outside interface 4 provide more for first driving device and the second driving device
Specification driving power.
Further, worm and gear lifting apparatus test device further includes passing for sensing the first temperature of stepper motor temperature
Sensor, the second temperature sensor for sensing hydraulic fluid temperature and the pressure sensing for sensing fluid pressure line oil circuit pressure
Device.
MCU controller 10 provides the speed of service by driver control stepper motor for worm and gear elevator；PLC control
Device 7 processed respectively with pressure sensor, the first temperature sensor, second temperature sensor, the overflow valve being mounted on hydraulic cylinder, peace
Reversal valve, the pump machine on hydraulic cylinder are electrically connected.Specifically, the overflow valve that loading force control is completed in cooperation passes through function
Rate amplification board is communicated with PLC controller, is realized and is talked with by touch screen and operator, completes to carry by manual Debugging interface
The stepless changing of load forces.The branch pump machine of hydraulic load mechanism is three-phase 380V asynchronous machine, is controlled by PLC controller, will be oily
Oil in case is driven into hydraulic cylinder, provides power for hydraulic cylinder.
Specifically, programmable touch screen 1 is connect with the MCU controller 10 and PLC controller 7, passes through programmable touch
The human-computer interaction interface of screen controls to MCU controller 10 and PLC controller 7 and sends instruction.
The invention also includes a kind of control method of worm and gear lifting apparatus test device, which includes adjusting manually
Examination and a key test two kinds of control flows.The human-computer interaction interface of programmable touch screen 1 by manual Debugging interface, test boundary automatically
Face composition.Test platform where test product can be tested by manual Debugging interface, be realized to different test product controls
The acquisition of parameter processed.Pressure value, test product movement travel value are resetted including hydraulic system load parameter, hydraulic cylinder.Specifically,
Control method the following steps are included:
S1 parameter calibration.Parameter calibration, that is, manager passes through the manual Debugging interface of touch screen, and debugging obtains a key manually
Parameter in testing process after being set, is written in a key testing process.Design parameter includes the first pre-set velocity, first
Preset strokes, the first preset time, the first predetermined load power, the first preset temperature, the first default temperature rise speed, the first limit temperature
Degree, the second limiting temperature, hydraulic cylinder reset pressure value and pressure limit value.
Specifically, the pressure limit value that oil circuit is arranged is 25MPa；It is 5MPa that hydraulic cylinder, which resets pressure value, and hydraulic stem can be fast
In the lossless retraction cylinder of speed；The Limit temperature value that stepper motor is arranged is 80 DEG C；The Limit temperature value of hydraulic oil is 60 DEG C；Setting
The start-up temperature of water cooler is 30 DEG C.The default temperature rise speed of the first of hydraulic oil is 0.2 DEG C/min.Specifically, stepper motor with
The revolving speed of setting drives elevator to move back and forth by gear assembly, and the stroke passed by 10S is X meters, and X is defeated
Enter to touch screen stroke parameter text box, touch screen is fed back to be obtained in system after internal PID algorithm process to PLC processor
Portion's parameter.The stroke Y run will be needed to be input to touch screen stroke distances text box again at this time, at internal system PLC
After reason, realize that elevator travel is the result of Y.
S2 equipment self-inspection, equipment carry out the judgement of analog quantity presence, if online, then do not alarmed and waiting operator
Operation acknowledgement.If insignificant analog quantity is offline, after operator's confirmation, program is run down.
Specifically, important analog quantity is overflow valve opening amount signal amount, pipeline pressure value；Insignificant analog quantity is motor and liquid
Pressure oil temperature value.
After controller completes hydraulic cylinder homing action with the hydraulic cylinder playback pressure value set, oil pump is closed, and carry out true
Recognize.It is sequentially completed closing outflow valve, the movement of reversal valve or state confirmation.Temperature, pressure parameter are checked whether in normal range (NR).
Specifically, 60 DEG C of motor temperature or less, 40 DEG C of hydraulic fluid temperature hereinafter, pressure parameter be 0MPa.
S3 control stepper motor is run with the first pre-set velocity, is continued after stepper motor stroke reaches the first preset strokes
Run the first preset time.
Specifically, stepper motor high speed characteristic and run signal are successively given according to pre-set parameter, control stepper motor
High-speed cruising, drives test platform movement, i.e. the first pre-set velocity is 300r/min.When stepper motor stroke reaches parameter setting
Stroke parameter value when, continue to run 1 second.
S4, which controls stepper motor, to be continued to be controlled the hydraulic cylinder with the operation of the first pre-set velocity and exported the first predetermined load
Power, after stepper motor stroke reaches the second preset strokes, hydraulic cylinder suspension work, it is pre- that the stepper motor continues to run second
If the time；
Specifically, the first predetermined load power is low load loading force, and low load pressure limit is 0.5T to 1T；Second default row
Journey can be equal to the first preset strokes, and the second preset time can be the first preset time, and as 1 second.
S5 control stepper motor is run with the second pre-set velocity, and control hydraulic cylinder exports the second predetermined load power, works as stepping
After motor range reaches third preset strokes, hydraulic cylinder suspension work, the stepper motor continue to run third it is default when
Between；
Specifically, the second pre-set velocity can be that the first pre-set velocity is successively decreased with fixed velocity amplitude or with fixed ratio
Successively decrease.If the first pre-set velocity is V, then the second pre-set velocity can be V-N or V/N；Similarly, the second predetermined load power is then with solid
Fixed force value is incremented by or is incremented by with fixed ratio, and such as the first predetermined load power is F, then the second predetermined load power can be F+FN
Or NF.Third preset strokes can be equal to the second preset strokes, and third preset time can be equal to the second preset time, i.e., 1 second.
S6 controls stepper motor with the operation of third pre-set velocity, and control hydraulic cylinder exports third predetermined load power, works as stepping
After motor range reaches the 4th preset strokes, stepper motor continues to run the 4th preset time, the subsequent stepper motor and institute
Hydraulic cylinder is stated to stop working.
Specifically, third pre-set velocity can be that the first pre-set velocity is successively decreased with fixed velocity amplitude or with fixed ratio
Successively decrease.If the first pre-set velocity is V, then third pre-set velocity can be V-2N or V/2N；Similarly, third predetermined load power then with
Fixed force value is incremented by or is incremented by with fixed ratio, and such as the first predetermined load power is F, then third predetermined load power can be F+
2FNOr NF.4th preset strokes can be equal to third preset strokes, and the 4th preset time can be equal to third preset time, i.e., 1 second.
S7, in above step, when the temperature rise speed that the temperature of hydraulic oil is more than the first preset temperature or hydraulic oil is more than
When the first default temperature rise speed, water cooler is opened；When the temperature of hydraulic oil is more than the first limiting temperature, worm and gear elevator
Test device stops working；When the oil circuit pressure of hydraulic pipeline is more than pressure limit value, worm and gear goes up and down apparatus test device
It stops working；When the stepper motor temperature is more than the second Limit temperature value, worm and gear goes up and down apparatus test device and stops work
Make.
Specifically, the first preset temperature is 30 DEG C, and the first default temperature rise speed is 0.2 DEG C/min, and the first limiting temperature is
60 DEG C, pressure limit value 25MPa, the second Limit temperature value is 80 DEG C.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (9)
1. a kind of worm and gear goes up and down apparatus test device characterized by comprising
Test platform, the test platform are configured at fixed worm and gear elevator；
Driving device, the driving device include first driving device and the second driving device；
First driving device, the first driving device are used to provide driving force to the worm gear of the worm and gear elevator；
Second driving device, second driving device are used to provide loading force to the lead screw of the worm and gear elevator；
Control mechanism, for controlling the first driving device output driving power, the control mechanism is used for the control mechanism
Control the second driving device output loads power.
2. worm and gear as described in claim 1 goes up and down apparatus test device, which is characterized in that control mechanism include several with
The first interface of the first driving device connection, for receiving the information of the first driving device；The control mechanism packet
Include several second interfaces connecting with second driving device.
3. worm and gear as claimed in claim 2 goes up and down apparatus test device, which is characterized in that the first driving device includes
Stepper motor and gear assembly, the stepper motor pass through the worm gear of gear assembly and the worm and gear elevator
Connection；Second driving device includes hydraulic cylinder, overflow valve, reversal valve, pump machine, pressure sensor, water cooler and hydraulic tube
Road, the hydraulic stem of the hydraulic cylinder are connect with the lead screw of the worm and gear elevator.
4. worm and gear as claimed in claim 3 goes up and down apparatus test device, which is characterized in that including for sensing stepper motor
First temperature sensor of temperature, the second temperature sensor for sensing hydraulic fluid temperature and for sensing hydraulic tube road binders
The pressure sensor of road pressure.
5. worm and gear as claimed in claim 4 goes up and down apparatus test device, which is characterized in that the control mechanism includes MCU
Controller and PLC controller, the MCU controller control the stepper motor, provide operation for the worm and gear elevator
Speed；The PLC controller respectively with the pressure sensor, first temperature sensor, second temperature sensor, described
Overflow valve, the reversal valve, the pump machine are electrically connected.
6. worm and gear as claimed in claim 5 goes up and down apparatus test device, which is characterized in that control mechanism further includes that may be programmed
Touch screen, the programmable touch screen are connect with the MCU controller and the PLC controller, pass through programmable touch screen
Human-computer interaction interface controls to the MCU controller and the PLC controller and sends instruction.
7. a kind of control method of worm and gear lifting apparatus test device comprising whirlpool of any of claims 1-6
Worm and gear goes up and down apparatus test device, further comprising the steps of:
Parameter preset, the parameter include the first pre-set velocity, the first preset strokes, the first preset time, the first predetermined load
Power, the first preset temperature, the first default temperature rise speed, the first limiting temperature, the second limiting temperature, hydraulic cylinder playback pressure value and
Pressure limit value；
The judgement of analog quantity off-line state is carried out, alarm if offline and waits confirmation operation, if controlling hydraulic cylinder online with institute
State hydraulic cylinder playback pressure value and complete hydraulic cylinder homing action, close pump machine, and confirmed, be sequentially completed closing outflow valve,
Reversal valve simultaneously confirms, whether checks current stepper motor temperature, hydraulic fluid temperature and fluid pressure line oil circuit pressure in default model
It encloses；
Control stepper motor is run with the first pre-set velocity, when the stepper motor stroke reaches the subsequent reforwarding of the first preset strokes
The first preset time of row；
It controls the stepper motor to run with the first pre-set velocity, controls the hydraulic cylinder and export the first predetermined load power, work as institute
After stating stepper motor stroke the second preset strokes of arrival, the hydraulic cylinder suspension work, the stepper motor continues to run second
Preset time；
It controls the stepper motor to run with the second pre-set velocity, controls the hydraulic cylinder and export the second predetermined load power, work as institute
After stating stepper motor stroke arrival third preset strokes, the hydraulic cylinder suspension work, the stepper motor continues to run third
Preset time；
The stepper motor is controlled with the operation of third pre-set velocity, the hydraulic cylinder output third predetermined load power is controlled, works as institute
After stating stepper motor stroke the 4th preset strokes of arrival, the stepper motor continues to run the 4th preset time, the subsequent step
It stops working into motor and the hydraulic cylinder；
In above step, when the temperature rise speed that the temperature of hydraulic oil is more than the first preset temperature or hydraulic oil is more than first default
When temperature rise speed, water cooler is opened；When the temperature of the hydraulic oil is more than the first limiting temperature, the worm and gear elevator
Test device stops working；When the oil circuit pressure of hydraulic pipeline is more than pressure limit value, the worm and gear elevator test
Device stops working；When the stepper motor temperature is more than the second Limit temperature value, the worm and gear elevator test dress
It sets and stops working.
8. the control method of worm and gear lifting apparatus test device as claimed in claim 7, which is characterized in that described first is pre-
If speed>the second pre-set velocity>third pre-set velocity, the first predetermined load power<the second predetermined load power<third is default to be carried
Load forces.
9. the control method of worm and gear lifting apparatus test device as claimed in claim 8, which is characterized in that the first default row
Journey=the second preset strokes=third preset strokes=the 4th preset strokes, the first preset time=the second preset time=third
Preset time=the 4th preset time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811273883.8A CN109612750B (en) | 2018-10-30 | 2018-10-30 | Worm gear elevator testing device and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811273883.8A CN109612750B (en) | 2018-10-30 | 2018-10-30 | Worm gear elevator testing device and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109612750A true CN109612750A (en) | 2019-04-12 |
| CN109612750B CN109612750B (en) | 2020-10-23 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811273883.8A Active CN109612750B (en) | 2018-10-30 | 2018-10-30 | Worm gear elevator testing device and control method thereof |
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| Country | Link |
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| CN (1) | CN109612750B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212822A (en) * | 2019-04-30 | 2019-09-06 | 北京云迹科技有限公司 | Method for controlling stepping motor and device |
| CN113820162A (en) * | 2021-10-12 | 2021-12-21 | 山东国创精密机械有限公司 | Worm lift testing arrangement |
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| JPS5724839A (en) * | 1980-07-22 | 1982-02-09 | Mitsubishi Heavy Ind Ltd | Load applying device |
| CN202048978U (en) * | 2011-03-28 | 2011-11-23 | 北京维安技科技发展有限公司 | Automatic test instrument |
| CN103697133A (en) * | 2013-11-28 | 2014-04-02 | 江苏泰隆减速机股份有限公司 | Speed reducer for lifting device |
| CN204886764U (en) * | 2015-08-07 | 2015-12-16 | 鞍山市热工仪表阀门有限公司 | Servo electric actuator |
| CN207263368U (en) * | 2017-07-11 | 2018-04-20 | 北京恒兴利达仪器有限公司 | A kind of self-checking device of wireless work(figure test terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB618670A (en) * | 1946-11-11 | 1949-02-24 | Norman Moss | Power assisted controls for aircraft |
| JPS5724839A (en) * | 1980-07-22 | 1982-02-09 | Mitsubishi Heavy Ind Ltd | Load applying device |
| CN202048978U (en) * | 2011-03-28 | 2011-11-23 | 北京维安技科技发展有限公司 | Automatic test instrument |
| CN103697133A (en) * | 2013-11-28 | 2014-04-02 | 江苏泰隆减速机股份有限公司 | Speed reducer for lifting device |
| CN204886764U (en) * | 2015-08-07 | 2015-12-16 | 鞍山市热工仪表阀门有限公司 | Servo electric actuator |
| CN207263368U (en) * | 2017-07-11 | 2018-04-20 | 北京恒兴利达仪器有限公司 | A kind of self-checking device of wireless work(figure test terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212822A (en) * | 2019-04-30 | 2019-09-06 | 北京云迹科技有限公司 | Method for controlling stepping motor and device |
| CN110212822B (en) * | 2019-04-30 | 2021-03-09 | 北京云迹科技有限公司 | Stepping motor control method and device |
| CN113820162A (en) * | 2021-10-12 | 2021-12-21 | 山东国创精密机械有限公司 | Worm lift testing arrangement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109612750B (en) | 2020-10-23 |
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