CN206677858U - A kind of electric fixed-torque spanner control device that peak is kept away based on Power Control and dynamic - Google Patents
A kind of electric fixed-torque spanner control device that peak is kept away based on Power Control and dynamic Download PDFInfo
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- CN206677858U CN206677858U CN201720334255.0U CN201720334255U CN206677858U CN 206677858 U CN206677858 U CN 206677858U CN 201720334255 U CN201720334255 U CN 201720334255U CN 206677858 U CN206677858 U CN 206677858U
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Abstract
The utility model discloses a kind of electric fixed-torque spanner control device that peak is kept away based on Power Control and dynamic, it includes electric fixed-torque spanner signal pickup assembly, main controller, thyristor gating circuit and power circuit, the output end of the electric fixed-torque spanner signal pickup assembly is connected with the input of main controller, the output end of the main controller is connected with the input of thyristor gating circuit, the output end of the thyristor gating circuit is connected with the control terminal of single-phase series excitation formula motor, and the power circuit for whole control device providing operating voltage.The utility model is kept away by the way of peak is combined using Power Control and dynamic time and electric fixed-torque spanner is controlled, and not only ensure that moment of torsion control precision when voltage changes in the range of 200V 250V, enhances the adaptability of electric fixed-torque spanner；And the dynamic time for realizing electric fixed-torque spanner keeps away peak.
Description
Technical field
A kind of electric fixed-torque spanner control device that peak is kept away based on Power Control and dynamic is the utility model is related to, is belonged to
Electric tool Screw assembly technical field.
Background technology
Electric fixed-torque spanner, it is one kind of electric wrench, its main feature can exactly set moment of torsion, and moment of torsion
It is adjustable, realize the accurate control to bolt torque.Electric fixed-torque spanner is widely used in the erection of pre-stressed bolt structural bridge,
Construction, the installation of chemical industry, metallurgy, generating equipment of steel-structure factory building, big machinery, crane gear and vehicle assembling work, with
And there is the occasion of strict demand to the moment of torsion and axial tension of threaded fastener.
Electric fixed-torque spanner (hereinafter referred to as instrument) is typically (hereinafter referred to as electric by double insulation single-phase series excitation formula motor
Machine) and reducing gear, and controller composition.Traditional controller is by the linear approximate relationship of electric current and moment of torsion (such as Fig. 2 institutes
Show), realized with the method for detection current of electric to moment of torsion control.I.e. corresponding moment of torsion is set in detecting that electric current reaches Fig. 2
During definite value, controlled motor is shut down, and reaches the purpose of electric current moment of torsion control.Current most of electric fixed-torque spanners, using this
Kind control mode.But this traditional control method does not account for the influence of live voltage：It is often unstable in site of deployment power supply,
When actually using in addition, live power supply wiring case uses ground farther out, it is necessary to be connected using longer electric power connection line from spanner,
Due to the presence of line resistance, spanner produces larger pressure drop on the line when working, and reduces the actual voltage obtained of instrument,
Cause input power to reduce (as shown in Figure 2) in the case of voltage change, such as still press original current curve control mode, then
The reduction of actual torque can be caused；Another situation can cause the rise of actual torque when being live overtension, intuitively
Implementation method can use the method for voltage compensation to realize：A compensation is multiplied by control electric current in voltage deviation normal value
COEFFICIENT K, COEFFICIENT K=1 is repaid in normal range (NR) in voltage, the penalty coefficient K when voltage is less than normal value>1, that is, take larger electricity
Flow control value, the penalty coefficient K when voltage is more than normal value<1, that is, take less current control value.And the essence of this method
It is Poewr control method, according to electrical power defined formula P=U*I, it is known that U-I inversely, i.e., should reduce electricity when voltage U is high
I controlling value is flowed, i.e., high current I controlling value is answered when voltage U is low.
Starting current and the relation of time of single-phase series excitation formula motor are as shown in figure 3, motor has on startup is more than
The starting current peak value of torque current setting value occurs, and monitoring current value at this moment is more than torque current setting value, if do not used
" electric current keeps away peak circuit " then motor can not normally start.Traditional electric current is kept away peak control mode and entered by the way of " delay keeps away peak "
Row electric current keeps away peak, i.e., the current value detected before the time point T of startup is not as arrival torque current criterion, elapsed time
After peak point current falls after rise after T, the electric current detected is just used as arrival torque current criterion,
Motor stopping control is carried out again, due to the difference of the working curve of different motors, causes duration of peak value to differ
Cause, as shown in Figure 4：The startup of A motors keeps away peak time and is smaller than B motors in Fig. 4, such as uses T1 using traditional " delay keeps away peak "
Value conduct keeps away peak time and then causes B motors not start normally, although causing B motor energy if being used as using T2 values and keeping away peak time
It is normal to start, but it is fixed keep away peak during in there is moment of torsion (electric current) and reach setting value and can not be detected, cause the super of moment of torsion
Limit, makes motor A can not carry out small moment of torsion control, so the set time keeps away peak and can not adapt to a variety of motors automatically, such as to every kind of
The peak time of keeping away of motor compensates, and causing controller to tune up, process is complicated, and versatility reduces.
In summary, there are some defects in traditional electric fixed-torque spanner：
1st, the missing of protected mode
Conventional tool only realizes current protection, due to no voltage sample and control loop, can not realize voltage protection.
When overtension or it is too low when, motor can not be protected, this be cause field tool motor component damage one it is important
Factor.
2nd, display mode imperfection
Conventional tool only realizes that moment of torsion is reached, the LED that does not reach show, breaks for over-pressed, under-voltage, motor, excessively stream
Situations such as the judgement of failure lack effective visual indication, cause field failure difficult judgment.
The content of the invention
For above-mentioned deficiency, the utility model, which provides, a kind of to be kept away the electronic of peak based on Power Control and dynamic and determines moment of torsion and pull
Hand control device, it can effectively solve the problem that the problem of traditional electric fixed-torque spanner is present, and be achieved in applying at the scene
Good effect.
The technical scheme in the invention for solving the technical problem is：
A kind of electric fixed-torque spanner control device that peak is kept away based on Power Control and dynamic, it is characterized in that, including it is electronic
Constant torque wrench signal pickup assembly, main controller, thyristor gating circuit and power circuit, the electric fixed-torque spanner signal
The output end of harvester is connected with the input of main controller, the output end of the main controller and the input of thyristor gating circuit
End is connected, and the output end of the thyristor gating circuit is connected with the control terminal of single-phase series excitation formula motor, the power circuit point
It is not connected with electric fixed-torque spanner signal pickup assembly, main controller, thyristor gating circuit and power circuit, to be whole
Control device provides operating voltage.
Preferably, it is true to include current true virtual value sample circuit, voltage for the electric fixed-torque spanner signal pickup assembly
Virtual value sample circuit and zero-crossing detection circuit, the main controller includes cpu circuit, moment of torsion sets circuit, LED state instruction
Circuit and controlling switch, described current true virtual value sample circuit, real available value of voltage sample circuit, zero-crossing examination electricity
Road, moment of torsion set the output end of circuit and controlling switch to be connected respectively with the input of cpu circuit, the output of the cpu circuit
The input respectively with thyristor gating circuit and LED state indicating circuit is held to be connected, the power circuit is electric with CPU respectively
Road, current true virtual value sample circuit, real available value of voltage sample circuit, zero-crossing detection circuit, thyristor gating circuit, electricity
Source circuit, moment of torsion set circuit to be connected with LED state indicating circuit.
Preferably, the cpu circuit includes STM32F series monolithics U1.
Preferably, the power circuit includes transformer T1 and integrated regulator U2, the input of the transformer T1
It is electrically connected with city, transformer T1 output end is connected with integrated regulator U2 input, the integrated regulator U2's
The lead-out terminal of output termination power circuit, to provide 3.3V DC supplies for control device.
Preferably, the current true virtual value sample circuit includes Current Transmit, current-to-voltage converting circuit, low pass
Wave filter and real effective DC converting circuit, the input of the input and current-to-voltage converting circuit of the Current Transmit
End is connected, and the output end of the current-to-voltage converting circuit is connected with the input of low pass filter, the low pass filter
Output end is connected with the input of real effective DC converting circuit, the input of the real effective DC converting circuit with
STM32F0 series monolithics U1 input is connected.
Preferably, the real available value of voltage sample circuit includes bleeder circuit, low pass filter and real effective direct current
Change-over circuit, the input of the bleeder circuit are connected with transformer T1 output end, the output end and low pass filtered of bleeder circuit
The input of ripple device is connected, and the output end of the low pass filter is connected with the input of real effective DC converting circuit, institute
The input for stating real effective DC converting circuit is connected with STM32F0 series monolithics U1 input.
Preferably, the zero-crossing detection circuit includes bleeder circuit, filter circuit and positive feedback comparison circuit, described point
The input of volt circuit is connected with transformer T1 output end, and the output end of bleeder circuit is connected with the input of filter circuit,
The output end of the filter circuit is connected with the input of positive feedback comparison circuit, the input of the positive feedback comparison circuit with
The input of STM32F0 series monolithics is connected.
Preferably, the thyristor gating circuit includes controllable silicon optocoupler U3 and bidirectional triode thyristor BT1, the controllable silicon light
Coupling U input is connected with STM32F0 series monolithics U1 signal output part, controllable silicon optocoupler U output end with it is two-way can
Control silicon BT1 gate pole is connected, and bidirectional triode thyristor BT1 two main terminals are arranged in the supply line of single-phase series excitation formula motor.
Preferably, the moment of torsion sets circuit to include torque setting potentiometer, the output end of the torque setting potentiometer
It is connected with the input of STM32F0 series monolithics；The LED state indicating circuit include first state indicating circuit LED1 and
Second condition indication circuit LED2, described first state indicating circuit LED1 and the second condition indication circuit LED2 input
The output end with STM32F0 series monolithics is connected respectively；The controlling switch includes starting switch, the starting switch with
The input of STM32F0 series monolithics is connected.
The beneficial effects of the utility model are：After said mechanism, the utility model can use Power Control and move
The state time keeps away the mode that peak is combined and electric fixed-torque spanner is controlled, and ensure that voltage in 200V- using Power Control
Moment of torsion control precision when changing in the range of 250V, enhance the adaptability of electric fixed-torque spanner；Dynamic time keeps away peak
The secondary limit of crossing of relation progress electric current on the basis of peak between standby current actual value and setting value is kept away in original time to control, it is real
The dynamic time for having showed electric fixed-torque spanner keeps away peak.
The utility model keeps away the mode that peak is combined by using Power Control and dynamic time, and Power Control improves electricity
The moment of torsion control precision of dynamic constant torque wrench, enhance the adaptability of electric fixed-torque spanner；Dynamic keeps away peak technology, and it is electronic fixed to make
The minimal torque of torque wrench, which is started to control, a little to be extended downwardly, and has widened the moment of torsion control scope of electric fixed-torque spanner, is simplified simultaneously
The tune-up of electric fixed-torque spanner controller；Limit control is crossed by the way that the monitoring to voltage and electric current are secondary so that electronic fixed
Torque wrench is effectively protected in abnormal cases, extends the service life of instrument；LED instructions cause the operation of instrument more
Add intuitive and convenient.
Brief description of the drawings
Fig. 1 is theory diagram of the present utility model；
Fig. 2 is the torque current power relation figure of single-phase series excitation formula motor；
Fig. 3 is the starting current and the graph of a relation of time of single-phase series excitation formula motor；
Fig. 4 is that traditional starting current of single-phase series excitation formula motor keeps away peak curve map；
Fig. 5 is that the secondary electric current for crossing limit control of the utility model electric current keeps away peak curve map；
Fig. 6 is the circuit diagram of cpu circuit described in the utility model；
Fig. 7 is the circuit diagram of power circuit described in the utility model；
Fig. 8 is the circuit diagram of current true virtual value sample circuit described in the utility model；
Fig. 9 is the circuit diagram of real available value of voltage sample circuit described in the utility model；
Figure 10 is the circuit diagram of zero-crossing detection circuit described in the utility model；
Figure 11 is the circuit diagram of thyristor gating circuit described in the utility model；
Figure 12 is the circuit diagram that moment of torsion described in the utility model sets circuit；
Figure 13 is the circuit diagram of LED state indicating circuit described in the utility model；
Figure 14 is the circuit diagram of controlling switch described in the utility model.
Embodiment
For the technical characterstic for illustrating this programme can be understood, below by embodiment and its accompanying drawing is combined to this practicality
It is new to be described in detail.Following disclosure provide many different embodiments or example be used for realizing it is of the present utility model not
Same structure.In order to simplify disclosure of the present utility model, hereinafter the part and setting of specific examples are described.In addition, this
Utility model can in different examples repeat reference numerals and/or letter.This repetition be for purposes of simplicity and clarity,
Relation between itself not indicating discussed various embodiments and/or setting.It should be noted that part illustrated in the accompanying drawings
It is not drawn necessarily to scale.It is unnecessary to avoid that the utility model eliminates the description to known assemblies and treatment technology and process
Ground limits the utility model.
It is of the present utility model a kind of the electronic of peak is kept away based on Power Control and dynamic to determine moment of torsion and pull as shown in Fig. 1 to Figure 14
Hand control device, it includes electric fixed-torque spanner signal pickup assembly, main controller, thyristor gating circuit and power circuit,
The output end of the electric fixed-torque spanner signal pickup assembly is connected with the input of main controller, the output end of the main controller
It is connected with the input of thyristor gating circuit, the output end of the thyristor gating circuit and the control of single-phase series excitation formula motor
End be connected, the power circuit respectively with electric fixed-torque spanner signal pickup assembly, main controller, thyristor gating circuit and electricity
Source circuit is connected, to provide operating voltage for whole control device.
Preferably, it is true to include current true virtual value sample circuit, voltage for the electric fixed-torque spanner signal pickup assembly
Virtual value sample circuit and zero-crossing detection circuit, the main controller includes cpu circuit, moment of torsion sets circuit, LED state instruction
Circuit and controlling switch, described current true virtual value sample circuit, real available value of voltage sample circuit, zero-crossing examination electricity
Road, moment of torsion set the output end of circuit and controlling switch to be connected respectively with the input of cpu circuit, the output of the cpu circuit
The input respectively with thyristor gating circuit and LED state indicating circuit is held to be connected, the power circuit is electric with CPU respectively
Road, current true virtual value sample circuit, real available value of voltage sample circuit, zero-crossing detection circuit, thyristor gating circuit, electricity
Source circuit, moment of torsion set circuit to be connected with LED state indicating circuit.
As shown in fig. 6, the cpu circuit uses STM32F series monolithics U1.
As shown in fig. 7, the power circuit includes transformer T1 and integrated regulator U2, the input of the transformer T1
Duan Yu cities are electrically connected, and transformer T1 output end is connected with integrated regulator U2 input, the integrated regulator U2
Output termination power circuit lead-out terminal, to provide 3.3V DC supplies for control device.
As shown in figure 8, the current true virtual value sample circuit include Current Transmit, current-to-voltage converting circuit,
Low pass filter and real effective DC converting circuit, the input of the Current Transmit and current-to-voltage converting circuit
Input is connected, and the output end of the current-to-voltage converting circuit is connected with the input of low pass filter, the LPF
The output end of device is connected with the input of real effective DC converting circuit, the input of the real effective DC converting circuit
It is connected with STM32F0 series monolithics U1 input.
As shown in figure 9, the real available value of voltage sample circuit is straight including bleeder circuit, low pass filter and real effective
Change-over circuit is flowed, the input of the bleeder circuit is connected with transformer T1 output end, the output end and low pass of bleeder circuit
The input of wave filter is connected, and the output end of the low pass filter is connected with the input of real effective DC converting circuit,
The input of the real effective DC converting circuit is connected with STM32F0 series monolithics U1 input.
As shown in Figure 10, the zero-crossing detection circuit includes bleeder circuit, filter circuit and positive feedback comparison circuit, institute
The input for stating bleeder circuit is connected with transformer T1 output end, the output end of bleeder circuit and the input phase of filter circuit
Even, the output end of the filter circuit is connected with the input of positive feedback comparison circuit, the input of the positive feedback comparison circuit
End is connected with the input of STM32F0 series monolithics.
As shown in figure 11, the thyristor gating circuit includes controllable silicon optocoupler U3 and bidirectional triode thyristor BT1, described controllable
Silicon optocoupler U input is connected with STM32F0 series monolithics U1 signal output part, controllable silicon optocoupler U output end with it is double
It is connected to controllable silicon BT1 gate pole, bidirectional triode thyristor BT1 two main terminals are arranged on the supply line of single-phase series excitation formula motor
In.
As shown in Figure 12 to Figure 14, the moment of torsion sets circuit to include torque setting potentiometer, the torque setting current potential
The output end of device is connected with the input of STM32F0 series monolithics；The LED state indicating circuit indicates including first state
Circuit LED1 and the second condition indication circuit LED2, described first state indicating circuit LED1 and the second condition indication circuit
Output end of the LED2 input respectively with STM32F0 series monolithics is connected；The controlling switch includes starting switch, described
Starting switch is connected with the input of STM32F0 series monolithics.
As shown in Fig. 1 to Figure 14, control device of the present utility model is mainly by cpu circuit, high-precision current real effective
(IRMS) sample circuit, high-accuracy voltage real effective (VRMS) sample circuit, zero-crossing detection circuit, thyristor gating circuit
And single-phase series excitation formula motor, power circuit, moment of torsion set circuit, LED state indicating circuit, starting switch to form.CPU part makes
Master devices are used as by the use of the single-chip microcomputer of the serial 32 ARM-cortex systems of STM32F0, it is CPU part that U1, which divides,；K1 opens for startup
Close, constantly instrument of connecting carries out tightening operation；LED1 (green) is normal indicator lamp, and Chang Liang represents bolt fastening and reaches setting torsion
Square, LED2 (red) are abnormal indicator lamp, and Chang Liang represents bolt fastening and is not properly completed；W1 is that torque setting potentiometer is used to turn round
The setting of square, the exportable 0-3.3V of potentiometer voltage, into a/d converter PB0, it is converted into the moment of torsion for corresponding to 0%-100%
Performance number corresponding to setting value；The processing of Current Voltage passage employs the true RMS-TO-DC (virtual value-direct current) of ADI companies
Conversion chip AD8436.It can accurately calculate AC wave shape RMS (virtual value) direct current equivalence value, due to direct using hardware
The method of realization, performance and stability are better than the currently used RMS numeral solution party based on Fast Fourier Transform (FFT) FFT modes
Case, without considering programming cost or processor expense.It can provide high accuracy conversion in very wide incoming level and temperature range
As a result, performance is even more to be much better than the RMS change-over circuits of traditional diode rectification power-up capacitor filter mode, and it is in high low amplitude
Performance will not be impacted.It can be responded<100 μ V and>3V input signal, extends dynamic range, is adjusted without outside,
And harsh low level signal condition is adapted to, support is very wide to be outranged without clamping.Real effective-direct current turns
The use for changing chip ensure that electric current, voltage, the acquisition precision of electrical power, then ensure that the precision of control.Specific implementation：Electricity
Flow sampling and use 10A/10mA punchings (CT) current transformer, with the precision of guarantee sampling and linearly.The power line (L) of motor
Through punching CT, turn into CT primary, CT it is secondary it is grading complete I/V (Current Voltage conversion) through R22, after through C21, R21
Real effective-DC converting circuit that the low pass filter of composition enters U4 (AD8436) C22-24 compositions turns current signal
Corresponding direct current (DC) voltage signal is changed to, is exported by the pin of chip 9, into Chip Microcomputer A/D converter PA0；Voltage sample for into
This and security consideration voltage transformer (PT) are directly with transformer T1 second group of coil (2,3 pin) realization, (second group of coil
Energy is not provided a linear no-load voltage ratio is only provided, so second group of coil of transformer uses the turn ratio mode that primary and secondary is fixed
Be designed to PT), the voltage signal of PT outputs through R23, R24 partial pressure, after the low pass filter through C25, R25 composition enter U5
(AD8436) voltage signal is converted to corresponding direct current (DC) voltage by real effective-DC converting circuit of C26-28 compositions
Signal, exported by the pin of chip 9, into a/d converter PA1；Alternating current zero crossing signal generation part is made up of U6 etc., works as alternating voltage
During zero passage, through R26, R27 partial pressure, enter positive feedback comparator U6 after C29 filtering, produce the square wave letter of a synchronous ac zero-crossing point
Number, this signal enters the interrupt pin PA2 of single-chip microcomputer, controls single-phase series excitation formula motor to use for single-chip microcomputer；Controllable silicon and
Triggers circuit is made up of controllable silicon optocoupler U3 and bidirectional triode thyristor BT1, under the control of single-chip microcomputer, is completed soft start, is transported at full speed
Turn and shut-off function, due to the use of optocoupler make forceful electric power light current separation improve security and Electro Magnetic Compatibility；Power unit by
Transformer T1, integrated regulator U2 are formed, and 3.3V DC supplies are provided for system.
The utility model CPU samples, i.e. sampling period at 32 points under the control of zero crossing and timer per cycle (20ms)
For 1/ (50*32)=625ms.Sample the electric current IRMS of the virtual value, afterwards of obtained electric current (IRMS) voltage (VRMS) at every 8 points
Average computation is carried out respectively with voltage VRMS values, obtains the average AIRMS of virtual value electric current and the average of RMS voltage
AVRMS, precision is improved to eliminate to disturb, while by the average VRMS of the average AIRMS of current effective value and magnitude of voltage virtual value
Multiplication obtains performance number Ps=VRMS*IRMS, obtained performance number Ps compared with setting value, if more than setting power
Directly turn off controllable silicon.Reach the purpose of moment of torsion control.Sample obtained magnitude of voltage and provide voltage protection for instrument, as voltage is big
In 250V, then superpressure is represented, to protect instrument, at this moment press starting switch, instrument does not start, and red LED fast blink represents
Overpressure protection, as voltage is less than 200V, then represent under-voltage, to protect instrument, at this moment press starting switch, instrument does not start, green
Color LED fast blinks represent under-voltage protection；Equally sample obtained current value and also provide current protection for instrument, as electric current is more than
10A, then excessively stream is represented, control controllable silicon shut-off immediately, motor power-off, red LED, which flashes at a slow speed, represents overcurrent protection, such as electric current
Less than 1A, then represent that carbon brush for electric machine comes off or tool interior has broken string, at this moment green LED flashes at a slow speed.LED light is big
Facilitate judgement of the user to tool state greatly.During in order to reduce startup is used to the impact of electric fixed-torque spanner, extension the longevity
Life, devises soft starting circuit, the zero crossing of alternating current is obtained by alternating current zero crossing signal, control SCR Trigger Angle is from 90 °
To 0 ° of gradual change process, change makes the voltage of motor be gradually increased 220V by 110V, realizes the soft start mistake of instrument
Journey.Controllable silicon all turns on after the completion of soft start, ingoing power detection-phase；By continuously detecting motor actual power Ps, when
When power P s reaches setting value, tool down, the process of power moment of torsion control is realized.
The utility model is based on the relation kept away in original time on the basis of peak between standby current actual value and setting value
On propose " dynamic time keeps away peak " scheme, as shown in figure 5, the normal start-up course of motor is：In the T0 times after electric motor starting,
Electric current can exceed setting value (once cross and limit) for the first time, then reach maximum (peak value), afterwards the motor electricity near the T1 times
Stream can be re-lowered to less than setting value, and with bolt by pine to tightly, the reaction force (resistance) of the torsion of fastening bolt is in T2
Time can make current of electric is secondary to exceed setting value (secondary cross limits), at this moment can consider the setting value that moment of torsion (electric current) reaches,
It can be shut down with controlled motor, end tightens operation.The concussion being had when near setting value is returned in view of electric current is secondary, should be by two
Secondary setting value adds hysteresis space, and the design is first less than the 90% of setting value using current value, after (T1 points) again above
Setting value (T2 points), the criterion shut down is reached as setting torque current.It is this based on the secondary control more than setting value of electric current
Mode is referred to as " electric current is secondary to cross limit control mode ".The secondary limit control mode of crossing of electric current keeps away peak with reference to traditional set time, real
Show " electric fixed-torque spanner dynamic current keeps away peak ".
In addition, application of the present utility model be not limited to the technique of the specific embodiment described in specification, mechanism,
Manufacture, material composition, means, method and step.From disclosure of the present utility model, as one of ordinary skill in the art
Will readily appreciate that, for current technique that is existing or will developing later, mechanism, manufacture, material composition, means,
Method or step, the function or obtain substantially that wherein their execution are substantially the same with the corresponding embodiment of the utility model description
Identical result, they can be applied according to the utility model.Therefore, the appended claims for the utility model be intended to by
These techniques, mechanism, manufacture, material composition, means, method or step are included in its protection domain.
Claims (9)
1. a kind of electric fixed-torque spanner control device that peak is kept away based on Power Control and dynamic, it is characterized in that, including it is electronic fixed
Torque wrench signal pickup assembly, main controller, thyristor gating circuit and power circuit, the electric fixed-torque spanner signal are adopted
The output end of acquisition means is connected with the input of main controller, the output end of the main controller and the input of thyristor gating circuit
It is connected, the output end of the thyristor gating circuit is connected with the control terminal of single-phase series excitation formula motor, the power circuit difference
It is connected with electric fixed-torque spanner signal pickup assembly, main controller, thyristor gating circuit and power circuit, to be controlled to be whole
Device processed provides operating voltage.
2. a kind of electric fixed-torque spanner control device that peak is kept away based on Power Control and dynamic according to claim 1,
It is characterized in that the electric fixed-torque spanner signal pickup assembly includes current true virtual value sample circuit, real available value of voltage
Sample circuit and zero-crossing detection circuit, the main controller include cpu circuit, moment of torsion set circuit, LED state indicating circuit and
Controlling switch, described current true virtual value sample circuit, real available value of voltage sample circuit, zero-crossing detection circuit, moment of torsion
Set the output end of circuit and controlling switch to be connected respectively with the input of cpu circuit, the output end of the cpu circuit respectively with
Thyristor gating circuit is connected with the input of LED state indicating circuit, and the power circuit is true with cpu circuit, electric current respectively
Virtual value sample circuit, real available value of voltage sample circuit, zero-crossing detection circuit, thyristor gating circuit, power circuit, torsion
Square sets circuit to be connected with LED state indicating circuit.
3. a kind of electric fixed-torque spanner control device that peak is kept away based on Power Control and dynamic according to claim 2,
It is characterized in that the cpu circuit includes STM32F series monolithics U1.
4. a kind of electric fixed-torque spanner control device that peak is kept away based on Power Control and dynamic according to claim 3,
It is characterized in that the power circuit includes transformer T1 and integrated regulator U2, the input and civil power of the transformer T1
It is connected, transformer T1 output end is connected with integrated regulator U2 input, the output end of the integrated regulator U2
The lead-out terminal of power circuit is connect, to provide 3.3V DC supplies for control device.
5. a kind of electric fixed-torque spanner control device that peak is kept away based on Power Control and dynamic according to claim 4,
It is characterized in that the current true virtual value sample circuit includes Current Transmit, current-to-voltage converting circuit, low pass filter
With real effective DC converting circuit, the input of the Current Transmit and the input phase of current-to-voltage converting circuit
Even, the output end of the current-to-voltage converting circuit is connected with the input of low pass filter, the output of the low pass filter
End be connected with the input of real effective DC converting circuit, the input of the real effective DC converting circuit and
STM32F0 series monolithics U1 input is connected.
6. a kind of electric fixed-torque spanner control device that peak is kept away based on Power Control and dynamic according to claim 4,
It is characterized in that the real available value of voltage sample circuit includes bleeder circuit, low pass filter and real effective direct current conversion electricity
Road, the input of the bleeder circuit are connected with transformer T1 output end, the output end of bleeder circuit and low pass filter
Input is connected, and the output end of the low pass filter is connected with the input of real effective DC converting circuit, described really to have
The input of valid value DC converting circuit is connected with STM32F0 series monolithics U1 input.
7. a kind of electric fixed-torque spanner control device that peak is kept away based on Power Control and dynamic according to claim 4,
It is characterized in that the zero-crossing detection circuit includes bleeder circuit, filter circuit and positive feedback comparison circuit, the bleeder circuit
Input be connected with transformer T1 output end, the output end of bleeder circuit is connected with the input of filter circuit, the filter
The output end of wave circuit is connected with the input of positive feedback comparison circuit, the input of the positive feedback comparison circuit with
The input of STM32F0 series monolithics is connected.
8. a kind of electric fixed-torque spanner control device that peak is kept away based on Power Control and dynamic according to claim 4,
It is characterized in that the thyristor gating circuit includes controllable silicon optocoupler U3 and bidirectional triode thyristor BT1, the controllable silicon optocoupler U's
Input is connected with STM32F0 series monolithics U1 signal output part, controllable silicon optocoupler U output end and bidirectional triode thyristor
BT1 gate pole is connected, and bidirectional triode thyristor BT1 two main terminals are arranged in the supply line of single-phase series excitation formula motor.
9. a kind of electric fixed-torque spanner control device that peak is kept away based on Power Control and dynamic according to claim 4,
It is characterized in that the moment of torsion sets circuit to include torque setting potentiometer, the output end of the torque setting potentiometer and
The input of STM32F0 series monolithics is connected；The LED state indicating circuit includes first state indicating circuit LED1 and the
Two-state indicating circuit LED2, described first state indicating circuit LED1 and the second condition indication circuit LED2 input point
Output end not with STM32F0 series monolithics is connected；The controlling switch includes starting switch, the starting switch with
The input of STM32F0 series monolithics is connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720334255.0U CN206677858U (en) | 2017-03-31 | 2017-03-31 | A kind of electric fixed-torque spanner control device that peak is kept away based on Power Control and dynamic |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720334255.0U CN206677858U (en) | 2017-03-31 | 2017-03-31 | A kind of electric fixed-torque spanner control device that peak is kept away based on Power Control and dynamic |
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| CN206677858U true CN206677858U (en) | 2017-11-28 |
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| CN201720334255.0U Withdrawn - After Issue CN206677858U (en) | 2017-03-31 | 2017-03-31 | A kind of electric fixed-torque spanner control device that peak is kept away based on Power Control and dynamic |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106737357A (en) * | 2017-03-31 | 2017-05-31 | 孟易鸿 | Power Control and dynamic keep away the electric fixed-torque spanner control device and method at peak |
| CN111922967A (en) * | 2020-08-05 | 2020-11-13 | 孟易鸿 | Digital display electric fixed torque wrench control device, wrench and method |
| WO2022027219A1 (en) * | 2020-08-04 | 2022-02-10 | Apex Brands, Inc. | Torque wrench with improved torque setting adjustment |
-
2017
- 2017-03-31 CN CN201720334255.0U patent/CN206677858U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106737357A (en) * | 2017-03-31 | 2017-05-31 | 孟易鸿 | Power Control and dynamic keep away the electric fixed-torque spanner control device and method at peak |
| WO2022027219A1 (en) * | 2020-08-04 | 2022-02-10 | Apex Brands, Inc. | Torque wrench with improved torque setting adjustment |
| US11701762B2 (en) | 2020-08-04 | 2023-07-18 | Apex Brands, Inc. | Torque wrench with improved torque setting adjustment |
| CN111922967A (en) * | 2020-08-05 | 2020-11-13 | 孟易鸿 | Digital display electric fixed torque wrench control device, wrench and method |
| CN111922967B (en) * | 2020-08-05 | 2021-10-22 | 山东中兴电动工具有限公司 | Digital display electric fixed torque wrench control device, wrench and method |
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Granted publication date: 20171128 Effective date of abandoning: 20180626 |