CN107947119A - A kind of electric elevatable table defense controls system - Google Patents
A kind of electric elevatable table defense controls system Download PDFInfo
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- CN107947119A CN107947119A CN201711322509.8A CN201711322509A CN107947119A CN 107947119 A CN107947119 A CN 107947119A CN 201711322509 A CN201711322509 A CN 201711322509A CN 107947119 A CN107947119 A CN 107947119A
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
- H02H7/0853—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load specially adapted for motors rotating in both directions
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- H02P29/0241—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an overvoltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- H02P29/027—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an over-current
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
The invention discloses a kind of electric elevatable table defense controls system, including：Lifting column, the motor being arranged on the stent of desk；Current control device, for controlling and obtaining the real-time operating current of motor；Determining device, judges operating current whether motor is in obstruction state for basis；Controller, the operating condition for controlling motor carry out fence operation.Technical solution using the present invention can obtain whether motor is in obstruction state by current control device and determining device, and obstruction state can be in motor by the circuit between controller and motor, control motor to carry out fence operation, realize the intelligent protection of electric elevatable table.
Description
Technical field
The present invention relates to Electronic control field, more particularly to a kind of electric elevatable table defense controls system.
Background technology
With the development of social electronic technology, intelligentized Furniture has obtained extensive movement.Would generally be practical in intelligentized Furniture
Electric device opens the movement for controlling the component in intelligentized Furniture as driving.
In existing intelligentized Furniture motor is both provided with electric device.Electric table of the prior art, generally use lifting
Column is combined with the stent being used to support, and by the electric device being arranged in lifting column, controls stretching for lifting column
Contracting, further controls the height of electric table.
But control of the motor of the prior art for intelligentized Furniture, it is generally unidirectional, can not be effectively according to intelligence
The situation of energy furniture reality is made a response.For electric elevatable table, the obstruction in the external world can not be sensed during the motion, from doing
Go out corresponding safeguard procedures, then user may be subject to unnecessary injury.
The content of the invention
For the above problem existing for intelligentized Furniture in the prior art, a kind of electric elevatable table defense controls system is now provided
System.
Concrete technical scheme is as follows：
A kind of electric elevatable table defense controls system, including：
Lifting column, is arranged on the stent of desk；
Motor, is arranged in the lifting column, a supply unit is connected, for controlling the liter of the lifting column
Drop state；
Current control device, connects the motor and supply unit, works in real time for controlling and obtaining the motor
Electric current；
Determining device, connects the current control device respectively, judges that the operating current motor is for basis
It is no to be in obstruction state；
Controller, connects the motor, the determining device, the current control device, for controlling the fortune of the motor
Turn state.
Preferably, the current control device includes：
N-type metal-oxide-semiconductor, grid connect the 3rd node, source electrode connection section point, drain electrode connection first node, for basis
The signal of the control signal end of the controller controls the start and stop state of the motor；
First resistor, both ends connect the 3rd node and the control signal end respectively；
Second resistance, both ends connect the 3rd node and the 5th node respectively；
3rd resistor, both ends connect section point and the 5th node respectively, for as sampling resistor；
4th resistance, both ends connect the section point and fourth node respectively；
Stabipack, both ends connect the 5th node and the fourth node respectively, for voltage stabilizing and filtering；
The first node connects the motor, and the fourth node is connected with current signal output end, described Section five
Point connects the anode of the supply unit, and the cathode of the supply unit connects the motor.
Preferably, the stabipack includes：
One zener diode, cathode connect the 5th node, and anode connects the fourth node；
One first capacitance, both ends connect the 5th node and the fourth node respectively.
Preferably, the determining device includes：
Storage unit, for the current value of the operating current to be stored in the form of round-robin queue；
First modeling unit, connects the storage unit, for obtaining the circulation team with default second time interval
The absolute value of the difference of the current value of current current value and previous second time interval in row is as collision detection current valve
Value, and threshold values envelope is established according to the collision detection current threshold；
Second modeling unit, connects the storage unit, for obtaining the circulation team with default 3rd time interval
The difference of current current value in row and the current value of previous 3rd time interval is as real-time current changing value, and according to institute
State real-time current changing value and establish real-time current change curve；
Data analysis unit, connects first modeling unit and the second modeling unit respectively, described in obtaining in real time
Real-time current change curve is more than the time of the threshold values envelope as the time is judged, is sentenced according to the duration of the judgement time
Whether the motor that breaks is in obstruction state.
Preferably, the controller further includes an AD conversion unit, connects the electric current of the current control device respectively
Signal output part and the storage unit, for being converted to the electric signal of the operating current with default first time interval
Digital signal is to send into the storage unit.
Preferably, the controller further includes：
Control unit is run, the current control device is connected by a signal control terminal, for controlling the motor
Start and stop state；
Direction controlling unit, the motor and the power supply are connected by first direction control terminal with second direction control terminal
Device, for controlling the rotation direction of the motor；
Driving unit is protected, the operation control unit, the direction controlling unit, the determining device is connected respectively, uses
In when the motor is in obstruction state, the motor antiport is controlled by the direction controlling unit, and described
After motor antiport preset time, the motor is controlled to shut down by the operation control unit.
Preferably, the first direction control terminal connects the first relay, described by one first transistor amplifier
Second direction control terminal connects the second relay by one second transistor amplifier；
The control terminal of first relay connects the first direction control terminal, and the first of first relay fixes
The cathode of motor described in contact portion, the first double-throw contact of first relay connect the cathode of the supply unit, institute
The second double-throw contact for stating the first relay connects the current control device；
The control terminal of second relay connects the second direction control terminal, and the second of second relay fixes
The anode of motor described in contact portion, the 3rd double-throw contact of second relay connect the cathode of the supply unit, institute
The 4th double-throw contact for stating the second relay connects the current control device.
Preferably, second double-throw contact connects the current control with the 4th double-throw contact by the 6th node
Device, the 6th node are also connected with the cathode of first diode for being used for afterflow, the anode connection of first diode
The cathode of the supply unit.
Preferably, the electric elevatable table defense controls system further includes an interference process circuit, the interference processing electricity
Road includes：
Varistor, both ends connect the cathode and anode of the motor respectively, for absorbing the peak voltage and electricity of input
Road is anti-interference；
5th resistance, both ends connect the cathode and the 7th node of the motor respectively；
Second capacitance, both ends connect the anode and the 7th node of the motor respectively.
Preferably, the supply unit is a constant-voltage DC source.
Above-mentioned technical proposal has the following advantages that or beneficial effect：
Whether technical solution using the present invention, can obtain motor in obstruction by current control device and determining device
State, can be in obstruction state, control motor carries out fence operation, real by the circuit between controller and motor in motor
The intelligent protection of electric elevatable table is showed, this programme, which is realized, also has detection fast response time, accuracy rate while intelligent protection
Height, saves the effect of hardware cost.
Brief description of the drawings
With reference to appended attached drawing, more fully to describe the embodiment of the present invention.However, appended attached drawing be merely to illustrate and
Illustrate, and be not meant to limit the scope of the invention.
Fig. 1 is a kind of structure diagram of electric elevatable table defense controls system embodiment of the present invention；
Fig. 2 is the structure diagram of current control device in the embodiment of the present invention；
Fig. 3 is a kind of electrical block diagram of electric elevatable table defense controls system embodiment of the present invention；
Fig. 4 is the structure diagram of determining device in the embodiment of the present invention；
Fig. 5 is the schematic diagram of threshold values envelope and real-time current change curve in the embodiment of the present invention；
Fig. 6 is the structure diagram of controller in the embodiment of the present invention.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art obtained on the premise of creative work is not made it is all its
His embodiment, belongs to the scope of protection of the invention.
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, but not as limiting to the invention.
In a kind of preferred embodiment of the present invention, according to Fig. 1, a kind of electric elevatable table defense controls system, including：
Lifting column, is arranged on the stent of desk；
Motor 1, is arranged in lifting column, a supply unit 6 is connected, for controlling the jacking condition of lifting column；
Current control device 2, connection motor 1 and supply unit 6, for controlling and obtaining 1 real-time operating current of motor；
Whether determining device 3, connects current control device 2 respectively, judge operating current motor 1 in obstruction for basis
State；
Controller 4, connection motor 1, determining device 3, current control device 2, for controlling the operating condition of motor 1.
Specifically, in the present embodiment, motor 1 is arranged on lifting column, and lifting column is controlled by the rotation direction of motor 1
Stretch.Obtain whether motor 1 is in obstruction state by current control device 2 and determining device 3, pass through controller 4 and horse
Obstruction state can be in motor 1 up to the circuit between 1, controller 4 controls the start and stop of motor 1 by current control device 2
State, and when motor 1 is in obstruction state, control motor 1 carries out fence operation.Fence operation is reverse using control motor 1
Operating a period of time so that lifting column far turns to the direction of obstruction, protects electric elevatable table and built-in lifting column
With motor 1, the intelligent protection effect of electric elevatable table is realized.
The connection of lifting column and electric elevatable table is the prior art, passes through the elevating control electric elevatable table of lifting column
Height and position.
In a kind of preferred embodiment of the present invention, according to Fig. 2, current control device 2 includes：
N-type metal-oxide-semiconductor N1, grid connect the 3rd node E3, source electrode connection section point E2, drain electrode connection first node E1,
Start and stop state for the signal control motor 1 of the control signal end X1 according to controller 4；
First resistor R1, both ends connect the 3rd node E3 and control signal end X1 respectively；
Second resistance R2, both ends connect the 3rd node E3 and the 5th node E5 respectively；
3rd resistor R3, both ends connect section point E2 and the 5th node E5 respectively, for as sampling resistor；
4th resistance R4, both ends connect section point E2 and fourth node E4 respectively；
Stabipack, both ends connect the 5th node E5 and fourth node E4 respectively, for voltage stabilizing and filtering；
First node E1 connections motor 1, fourth node E4 is connected with current signal output end 30, the 5th node E5 connections electricity
The anode 62 of source device 6, the cathode 61 of supply unit 6 connect motor 1.
Specifically, in the present embodiment, the signal control N-type for the control signal end X1 that current control device 2 passes through controller 4
The connected state of metal-oxide-semiconductor N1, since the positive and negative anodes of supply unit 6 connect 1 and the 5th node E5 of motor respectively, at this time, passes through N-type
The connected state of metal-oxide-semiconductor N1 controls the electric current by motor 1, further, realizes the effect of the start and stop state of control motor 1
Fruit.Wherein, first resistor R1 and second resistance R2 act as anti-interference and protective resistance effect, is carried out by 3rd resistor R3
The sampling of electric current, the current signal most sampled at last are exported to current signal output end 30, and current signal output end 30 is with sentencing
Disconnected device 3 connects, and is realized the analysis of the operating current according to motor 1, judges whether motor 1 is in obstruction state.
In a kind of preferred embodiment of the present invention, according to Fig. 2, stabipack includes：
One zener diode D1, cathode connect the 5th node E5, anode connection fourth node E4；
One first capacitance C1, both ends connect the 5th node E5 and fourth node E4 respectively.
Specifically, in the present embodiment, using zener diode D1 and the first capacitance C1 be used for the current signal of output into
The processing of row voltage regulation filtering.
In a kind of preferred embodiment of the present invention, according to Fig. 4, determining device 3 includes：
Storage unit 31, for the current value of operating current to be stored in the form of round-robin queue；
First modeling unit 32, connects storage unit 31, for being obtained with default second time interval in round-robin queue
Current current value and previous second time interval current value difference absolute value as collision detection current threshold, and
Threshold values envelope L1 is established according to collision detection current threshold；
Second modeling unit 33, connects storage unit 31, for being obtained with default 3rd time interval in round-robin queue
Current current value and previous 3rd time interval current value difference as real-time current changing value, and according to real-time electricity
Stream changing value establishes real-time current change curve L2；
Data analysis unit 34, connects the first modeling unit 32 and the second modeling unit 33 respectively, real for obtaining in real time
When the time of curent change curve L2 more than threshold values envelope L1 as the time is judged, motor is judged according to the duration for judging the time
Whether 1 be in obstruction state.
Specifically, in the present embodiment, using storage unit 31, T1 (preferably 4ms) will be got at a certain time interval
Current value stored, to form the round-robin queue In1 of certain length.
According to Fig. 5, the first modeling unit 32, T2, takes out from round-robin queue In1 and works as at set time intervals
Preceding current value and the current value of previous second time interval are respectively I1, I2, being taken definitely after the subtracting each other of the two current values
Value, obtains a dynamic collision detection current threshold Δ Is=| I1-I2 |, collision detection current threshold Δ Is is formed dynamic
State curve is a dynamic threshold values envelope L1.
According to Fig. 5, the second modeling unit 33, while T3 takes from round-robin queue In1 at set time intervals
It is respectively I1 ' and I2 to go out current current value and the current value of previous 3rd time interval ', obtain the change of 1 real-time current of motor
It is worth Δ Ir=I2 '-I1 ', the curve that 1 real-time current changing value Δ Ir of motor is formed is bent for a dynamic real-time current change
Line L2.
According to Fig. 5, in 1 normal course of operation of motor, the real-time current change curve L2 of motor 1 is bound in valve
It is worth inside envelope L1.The external force if motor 1 is collided in column operational process, will necessarily produce more than threshold values envelope
The 1 real-time current changing value of motor of L1.
Data analysis unit 34, the time span of threshold values envelope L1 is crossed over by timing real-time current, it is possible to judge
Whether motor 1 is in obstruction state, and equivalent to detecting whether lifting column is subject to the resistance of barrier, there occurs collided
Journey.
By adjusting time interval T1, time interval T2, time interval T3, it is possible to achieve control sensitivity is adjusted flexibly,
Improve the reliability of intelligent protection.
In a kind of preferred embodiment of the present invention, determining device 3 further includes an AD conversion unit, connects current control respectively
The current signal output end 30 and storage unit 31 of device 2, for default first time interval by the telecommunications of operating current
Number digital signal is converted to send into storage unit 31.
In a kind of preferred embodiment of the present invention, according to Fig. 6, controller 4 includes：
Control unit 41 is run, current control device 2 is connected by a signal control terminal, for controlling the start and stop of motor 1
State；
Direction controlling unit 43, motor 1 and power supply are connected by first direction control terminal X2 with second direction control terminal X3
Device 6, for controlling the rotation direction of motor 1；
Driving unit 42 is protected, respectively connection operation control unit 41, direction controlling unit 43, determining device 3, in horse
When being in obstruction state up to 1,1 antiport of motor is controlled by direction controlling unit 43, and when 1 antiport of motor is default
Between after, by run control unit 41 control motor 1 shut down.
Specifically, it is defeated to current control device 2 by control signal end X1 using operation control unit 41 in the present embodiment
Go out control signal, by the electric current of 2 control input motor 1 of current control device, further control motor 1 start and stop state and
Rotating speed.
Direction controlling unit 43 controls horse by exporting signal with first direction control terminal X2 and second direction control terminal X3
Connected up to 1 with the positive and negative anodes of supply unit 6, so as to control the rotation direction of motor 1.
Driving unit 42 is protected to control the normal of motor 1 by controlling operation control unit 41 and direction controlling unit 43
Work.At the same time when motor 1 is in obstruction state, fence operation is carried out, after realization collides, to opposite direction and the skill of operating
Art effect, avoids user from being collided injury.
In a kind of preferred embodiment of the present invention, according to Fig. 2, first direction control terminal X2 passes through one first triode
Amplifying circuit S1 the first relays of connection K1, second direction control terminal X3 pass through one second transistor amplifier S2 connections second
Relay K2；
The control terminal connection first direction control terminal X2 of first relay K1, the first fixed contact of the first relay K1
The cathode of K11 connections motor 1, the cathode 61 of the first double-throw contact K12 connections supply unit 6 of the first relay K1, first after
The second double-throw contact K13 connections current control device 2 of electric appliance K1；
The control terminal connection second direction control terminal X3 of second relay K2, the second fixed contact of the second relay K2
The anode of K21 connections motor 1, the cathode 61 of the 3rd double-throw contact K22 connections supply unit 6 of the first relay K1, second after
The 4th double-throw contact K23 connections current control device 2 of electric appliance K2.
Specifically, in the present embodiment, using two above-mentioned transistor amplifiers so that first direction control terminal X2 and
The contacts status of the first relay K1 and the second relay K2 can be controlled after the signal amplification of second direction control terminal X3.Using
The contact of first relay K1 and the second relay K2, the connection status of control motor 1 and the positive and negative anodes of supply unit 6.Into one
Step, realize controller 4 by first direction control terminal X2 and second direction control terminal X3 by controlling motor 1 and supply unit
6 just connecing or reversal connection realize control motor 1 positive and negative connection operating.The anode 62 of supply unit 6 is arranged on current control device 2
In, therefore, in said structure, the 4th double-throw contact of the second double-throw contact K13 and the second relay K2 of the first relay K1
K23 is connected equivalent to the anode 62 with supply unit 6.
Wherein, for the first relay K1 when being switched to the first double-throw contact K12, the second relay K2 synchronism switchings are the 4th
Double-throw contact K23；For first relay K1 when being switched to the second double-throw contact K13, the second relay K2 synchronism switchings are the 3rd
Double-throw contact K22.Such scheme can replace the connection of the positive and negative anodes of motor 1 and power supply at the same time so that motor 1 can be stablized
Ground switches to antiport.
In a kind of preferred embodiment of the present invention, according to Fig. 2, the second double-throw contact K13 and the 4th double-throw contact K23
By the 6th node E6 connections current control device 2, the 6th node E6 is also connected with one and is being used for the first diode D2 of afterflow just
Pole, the cathode 61 of the anode connection supply unit 6 of the first diode D2.
In a kind of preferred embodiment of the present invention, according to Fig. 2, it is dry that electric elevatable table defense controls system further includes one
Process circuit is disturbed, interference process circuit includes：
Varistor M1, both ends connect the cathode and anode of motor 1 respectively, for absorbing the peak voltage and circuit of input
It is anti-interference；
5th resistance R5, both ends connect the cathode and the 7th node E7 of motor 1 respectively；
Second capacitance C2, both ends connect the anode and the 7th node E7 of motor 1 respectively.
Specifically, in the present embodiment, varistor M1, the 5th resistance R5, the second capacitance C2 are used for circuit anti-interference.
In a kind of preferred embodiment of the present invention, supply unit 6 is a constant-voltage DC source.
The foregoing is merely preferred embodiments of the present invention, not thereby limit embodiments of the present invention and protection model
Enclose, to those skilled in the art, should can appreciate that all with made by description of the invention and diagramatic content
Equivalent substitution and obviously change obtained scheme, should be included in protection scope of the present invention.
Claims (10)
- A kind of 1. electric elevatable table defense controls system, it is characterised in that including：Lifting column, is arranged on the stent of desk；Motor, is arranged in the lifting column, a supply unit is connected, for controlling the lifting shape of the lifting column State；Current control device, connects the motor and the supply unit, works in real time for controlling and obtaining the motor Electric current；Determining device, connects the current control device respectively, judges whether the motor is located to the operating current for basis In the state of obstruction；Controller, connects the motor, the determining device, the current control device, for controlling the operating shape of the motor State.
- 2. electric elevatable table defense controls system according to claim 1, it is characterised in that the current control device bag Include：N-type metal-oxide-semiconductor, grid connect the 3rd node, source electrode connection section point, drain electrode connection first node, for according to The signal of the control signal end of controller controls the start and stop state of the motor；First resistor, both ends connect the 3rd node and the control signal end respectively；Second resistance, both ends connect the 3rd node and the 5th node respectively；3rd resistor, both ends connect section point and the 5th node respectively, for as sampling resistor；4th resistance, both ends connect the section point and fourth node respectively；Stabipack, both ends connect the 5th node and the fourth node respectively, for voltage stabilizing and filtering；The first node connects the motor, and the fourth node is connected with current signal output end, and the 5th node connects The anode of the supply unit is connect, the cathode of the supply unit connects the motor.
- 3. electric elevatable table defense controls system according to claim 2, it is characterised in that the stabipack includes：One zener diode, cathode connect the 5th node, and anode connects the fourth node；One first capacitance, both ends connect the 5th node and the fourth node respectively.
- 4. electric elevatable table defense controls system according to claim 1, it is characterised in that the determining device includes：Storage unit, for the current value of the operating current to be stored in the form of round-robin queue；First modeling unit, connects the storage unit, for being obtained with default second time interval in the round-robin queue Current current value and previous second time interval current value difference absolute value as collision detection current threshold, and Threshold values envelope is established according to the collision detection current threshold；Second modeling unit, connects the storage unit, for being obtained with default 3rd time interval in the round-robin queue Current current value and previous 3rd time interval current value difference as real-time current changing value, and according to the reality When current variation value establish real-time current change curve；Data analysis unit, connects first modeling unit and the second modeling unit respectively, described real-time for obtaining in real time Curent change curve is more than the time of the threshold values envelope as the time is judged, judges institute according to the duration of the judgement time State whether motor is in obstruction state.
- 5. electric elevatable table defense controls system according to claim 4, it is characterised in that the controller further includes one AD conversion unit, connects the current signal output end of the current control device and the storage unit, for pre- respectively If first time interval the electric signal of the operating current is converted into digital signal to send into the storage unit.
- 6. electric elevatable table defense controls system according to claim 1, it is characterised in that the controller further includes：Control unit is run, the current control device is connected by a signal control terminal, for controlling the start and stop of the motor State；Direction controlling unit, the motor and power supply dress are connected by first direction control terminal with second direction control terminal Put, for controlling the rotation direction of the motor；Protect driving unit, connect respectively it is described operation control unit, the direction controlling unit, the determining device, for When the motor is in obstruction state, the motor antiport is controlled by the direction controlling unit, and in the motor After antiport preset time, the motor is controlled to shut down by the operation control unit.
- 7. electric elevatable table defense controls system according to claim 6, it is characterised in that the first direction control terminal First relay is connected by one first transistor amplifier, the second direction control terminal is amplified by one second triode Circuit connects the second relay；The control terminal of first relay connects the first direction control terminal, the first fixed contact of first relay Connecting the cathode of the motor, the first double-throw contact of first relay connects the cathode of the supply unit, and described the Second double-throw contact of one relay connects the current control device；The control terminal of second relay connects the second direction control terminal, the second fixed contact of second relay Connecting the anode of the motor, the 3rd double-throw contact of second relay connects the cathode of the supply unit, and described the 4th double-throw contact of two relays connects the current control device.
- 8. electric elevatable table defense controls system according to claim 7, it is characterised in that second double-throw contact and 4th double-throw contact connects the current control device by the 6th node, and the 6th node is also connected with one and is used for afterflow The first diode cathode, the anode of first diode connects the cathode of the supply unit.
- 9. electric elevatable table defense controls system according to claim 1, it is characterised in that further include interference processing electricity Road, the interference process circuit include：Varistor, both ends connect the cathode and anode of the motor respectively, and the peak voltage and circuit for absorbing input resist Interference；5th resistance, both ends connect the cathode and the 7th node of the motor respectively；Second capacitance, both ends connect the anode and the 7th node of the motor respectively.
- 10. electric elevatable table defense controls system according to claim 1, it is characterised in that the supply unit is one Constant-voltage DC source.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711322509.8A CN107947119B (en) | 2017-12-12 | 2017-12-12 | A kind of electric elevatable table defense controls system |
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| CN201711322509.8A CN107947119B (en) | 2017-12-12 | 2017-12-12 | A kind of electric elevatable table defense controls system |
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| CN107947119A true CN107947119A (en) | 2018-04-20 |
| CN107947119B CN107947119B (en) | 2019-10-18 |
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| CN104460697A (en) * | 2014-10-31 | 2015-03-25 | 浙江捷昌线性驱动科技股份有限公司 | Method and device for achieving return of electric lifting table when obstruction is encountered through current dual-filter mode |
| CN205691988U (en) * | 2016-06-12 | 2016-11-16 | 深圳市集美华太科技有限公司 | A kind of electric elevatable table is hampered bounce-back controller |
| CN107125926A (en) * | 2017-06-20 | 2017-09-05 | 张新晨 | A kind of intelligent elevated study table and its lifting drive control circuit |
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2017
- 2017-12-12 CN CN201711322509.8A patent/CN107947119B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2590769Y (en) * | 2002-12-26 | 2003-12-10 | 张志刚 | Vehicle window monitoring & controlling device |
| CN104460697A (en) * | 2014-10-31 | 2015-03-25 | 浙江捷昌线性驱动科技股份有限公司 | Method and device for achieving return of electric lifting table when obstruction is encountered through current dual-filter mode |
| CN205691988U (en) * | 2016-06-12 | 2016-11-16 | 深圳市集美华太科技有限公司 | A kind of electric elevatable table is hampered bounce-back controller |
| CN107125926A (en) * | 2017-06-20 | 2017-09-05 | 张新晨 | A kind of intelligent elevated study table and its lifting drive control circuit |
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