CN104539282A - Switching signal collection circuit and method of magnetic switches and air-actuated control system - Google Patents
Switching signal collection circuit and method of magnetic switches and air-actuated control system Download PDFInfo
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Abstract
The invention discloses a switching signal collection circuit and method of magnetic switches and an air-actuated control system. The switching signal collection circuit comprises a level switching circuit and an optocoupler circuit. The level switching circuit is used for receiving signals output by the magnetic switches, carrying out step-down treatment on the signals and then outputting first control signals to the optocoupler circuit. The optocoupler circuit is used for controlling an optocoupler of the circuit to be connected or disconnected according to the first control signals so as to output collected switching signals of the magnetic switches. The switching signal collection circuit can guarantee that a microcontroller effectively collects the switching signals of the magnetic switches and solves the problem that the switching signals of the magnetic switches cannot be effectively collected.
Description
Technical field
The present invention relates to magnetic switch technical field, be specifically related to a kind of switching signal Acquisition Circuit of magnetic switch, method and atmospheric control.
Background technology
Utilizing cylinder to carry out in the system controlled, needing to install and can detect the magnetic switch of cylinder piston position and the solenoid control gas circuit of control piston side-to-side movement.The operation principle of system is: the piston in cylinder moves under the control of solenoid control gas circuit, when moving to position corresponding to magnetic switch (magnetic switch touches the magnetisable material of piston), magnetic switch works, and exports the low level signal into about 1.7V.Leave position corresponding to magnetic switch (when namely magnetic switch does not touch the magnetisable material of piston) when moving to, magnetic switch exports 5V power supply voltage signal.System acquisition to the open and close signal of magnetic switch change thus judge the movement position of cylinder piston.By magnetic switch, limit piston movement travel in the cylinder.In the control system being provided with solenoid control gas circuit; in order to avoid the switching signal of electromagnetically operated valve to magnetic switch causes interference; usually can photoelectric coupled circuit be set; first through photoelectric coupled circuit process before switching signal enters microcontroller, the forward voltage drop minimum value of the optical coupler of photoelectric coupled circuit is about 1.0V.When magnetic switch exports the level for about 5V or 1.7V, this level all can make optocoupler conducting.Therefore, and though magnetic switch export high level or low level signal optical coupler all can conducting, microcontroller below can't detect the change of the voltage signal of magnetic switch thus can not judge the position of cylinder piston, and the system of result in cannot work.
Summary of the invention
No matter the invention provides a kind of switching signal Acquisition Circuit of magnetic switch, method solve magnetic switch export high level or low level signal optical coupler all can conducting, microcontroller below can't detect the change of the voltage signal of magnetic switch thus can not judge the position of cylinder piston, the problem causing system to work, present invention also offers a kind of atmospheric control comprising the switching signal Acquisition Circuit of above-mentioned magnetic switch.
According to an aspect of the present invention, provide a kind of switching signal Acquisition Circuit of magnetic switch, this switching signal Acquisition Circuit comprises: level shifting circuit and photoelectric coupled circuit;
Level shifting circuit, for receiving the signal of magnetic switch output and exporting the first control signal to photoelectric coupled circuit after carrying out step-down process to signal;
Photoelectric coupled circuit, for according to the optical coupler conducting in the first control signal control circuit or cut-off, thus exports the switching signal of the magnetic switch collected.
Alternatively, level shifting circuit comprises: the first diode and the second diode;
The positive pole of the first diode is connected with the output of magnetic switch, and the negative pole of the first diode is connected with the positive pole of the second diode;
The negative pole of the second diode is connected with the input of the optical coupler of photoelectric coupled circuit;
The output of the optical coupler of photoelectric coupled circuit exports the switching signal of the magnetic switch collected.
Alternatively, level shifting circuit comprises: the 3rd voltage stabilizing didoe;
The negative pole of the 3rd voltage stabilizing didoe is connected with the output of magnetic switch;
The positive pole of the 3rd voltage stabilizing didoe is connected with the input of the optical coupler of photoelectric coupled circuit;
The output of the optical coupler of photoelectric coupled circuit exports the switching signal of the magnetic switch collected.
Alternatively, the supply power voltage of magnetic switch is 5V;
When magnetic switch does not touch magnetisable material, export the high level signal of 5V;
When magnetic switch touches magnetisable material, export the low level signal of 1.7V;
The conduction voltage drop of the first diode and the second diode is 0.6V-0.8V;
The forward voltage drop of the optical coupler of photoelectric coupled circuit is 1.0V.
Alternatively, the voltage stabilizing value of the 3rd voltage stabilizing didoe is: 1.7V-3.3V;
The supply power voltage of magnetic switch is 5V;
When magnetic switch does not touch magnetisable material, export the high level signal of 5V;
When magnetic switch touches magnetisable material, export the low level signal of 1.7V;
The forward voltage drop of the optical coupler of photoelectric coupled circuit is 1.0V.
According to another aspect of the present invention, provide a kind of atmospheric control, this atmospheric control comprises: Micro-processor MCV, magnetic switch, cylinder, gas path pipe, electromagnetically operated valve and the switching signal Acquisition Circuit as one aspect of the invention;
Electromagnetically operated valve for controlling the break-make of gas path pipe, during solenoid valve conduction, gas path pipe conducting, thus drive the piston movement of cylinder;
Be provided with magnetisable material in the piston of cylinder, when the piston movement of cylinder is to the installed position of magnetic switch, magnetic switch closes, otherwise magnetic switch is in off-state;
The output of switching signal Acquisition Circuit is connected with the input of Micro-processor MCV;
The switching signal of the magnetic switch that Micro-processor MCV collects according to switching signal Acquisition Circuit controls solenoid valve conduction corresponding to described gas path pipe or closedown.
According to a further aspect of the invention, provide a kind of switching signal acquisition method of magnetic switch, method comprises:
Receive the signal of magnetic switch output and export the first control signal after step-down process is carried out to signal;
According to the optical coupler conducting in the first control signal control circuit or cut-off, thus export the switching signal of the magnetic switch collected.
Alternatively, receive signal that magnetic switch exports and export the first control signal after step-down process is carried out to signal and comprise:
Utilize the first diode and the second diode composition level shifting circuit, the positive pole of the first diode is connected with the output of magnetic switch, the positive pole of the negative pole of the first diode with the second diode is connected;
The input of the negative pole of the second diode with the optical coupler of photoelectric coupled circuit is connected;
The output of the optical coupler of photoelectric coupled circuit is exported the switching signal of the magnetic switch collected.
Alternatively, receive signal that magnetic switch exports and export the first control signal after step-down process is carried out to signal and comprise:
Utilize the 3rd voltage stabilizing didoe composition level shifting circuit;
The negative pole of the 3rd voltage stabilizing didoe is connected with the output of magnetic switch;
The positive pole of the 3rd voltage stabilizing didoe is connected with the input of the optical coupler of photoelectric coupled circuit;
The output of the optical coupler of photoelectric coupled circuit is exported the switching signal of the magnetic switch collected.
Alternatively, the supply power voltage of magnetic switch is 5V;
When magnetic switch does not touch magnetisable material, export the high level signal of 5V;
When magnetic switch touches magnetisable material, export the low level signal of 1.7V;
The conduction voltage drop of the first diode and the second diode is 0.6V-0.8V;
The forward voltage drop of the optical coupler of photoelectric coupled circuit is 1.0V.
The switching signal Acquisition Circuit of this magnetic switch of the present invention carries out by the voltage signal exported magnetic switch the optical coupler that photoelectric coupled circuit is sent in step-down process again, like this when magnetic switch does not touch magnetisable material output high level signal, the voltage signal exported after the step-down process of level shifting circuit is still greater than the conducting of the forward voltage drop guarantee optical coupler of optical coupler, makes microcontroller high level signal be detected; When magnetic switch touches magnetisable material output for low level signal, the forward voltage drop that the voltage signal exported after the step-down process of level shifting circuit is less than optical coupler causes optical coupler to end, microcontroller is made low level signal to be detected, according to the change of the voltage signal of magnetic switch and the change of open and close signal and then the position judging cylinder piston, ensure the normal work of system.
Accompanying drawing explanation
Fig. 1 is the block diagram of the switching signal Acquisition Circuit of a kind of magnetic switch that one embodiment of the invention provides;
Fig. 2 is the circuit diagram of the switching signal Acquisition Circuit of a kind of magnetic switch that one embodiment of the invention provides;
Fig. 3 is the circuit diagram of the switching signal Acquisition Circuit of a kind of magnetic switch that one embodiment of the invention provides.
Embodiment
Core concept of the present invention is: the forward voltage drop due to optical coupler is about 1.0V when the supply power voltage of the magnetic switch in system is 5V, the voltage that when magnetic switch touches magnetisable material, (magnetic switch is in off status) exports is about 1.7V, the voltage that when not touching magnetisable material, (magnetic switch is in open state) exports is supply voltage and about 5V, and the forward voltage drop (1.0V) that 5V and 1.7V is greater than optical coupler all can cause optical coupler conducting, though like this magnetic switch export ON signal or OFF signal systems axiol-ogy to be all ON signal, thus can't detect the position of cylinder piston.Therefore, for this technical problem, the present invention proposes a kind of simple technical scheme effectively gathering the switching signal of magnetic switch, namely first step-down process is carried out to the signal that magnetic switch exports, signal after step-down process is sent into optical coupler, optical coupler conducting during guarantee magnetic switch output high level signal, export as optical coupler cut-off during low level signal, the switching signal of the magnetic switch that the output of optical coupler collects sends into the microprocessor of system again, and microprocessor is according to the switching signal of magnetic switch thus determine the movement travel of cylinder piston.
Fig. 1 is the block diagram of the switching signal Acquisition Circuit of a kind of magnetic switch that one embodiment of the invention provides, and see Fig. 1, the switching signal Acquisition Circuit 100 of this magnetic switch comprises: level shifting circuit 101, photoelectric coupled circuit 102;
Level shifting circuit 101, for receiving the signal of magnetic switch output and exporting the first control signal to photoelectric coupled circuit 102 after carrying out step-down process to signal;
Photoelectric coupled circuit 102, for according to the optical coupler conducting in the first control signal control circuit or cut-off, thus exports the switching signal of the magnetic switch collected.
By above-mentioned switching signal Acquisition Circuit, the voltage signal that magnetic switch exports can be processed, namely the conducting of optical coupler is ensured when magnetic switch exports high level signal, when magnetic switch exports as ensureing optical coupler cut-off during low level signal, microcontroller is made low level signal to be detected, thus and then can judge the position of cylinder piston to ensure the normal work of system according to the change of the change of the voltage signal of magnetic switch and open and close signal.
Fig. 2 is the circuit diagram of the switching signal Acquisition Circuit of a kind of magnetic switch that one embodiment of the invention provides; See Fig. 2, in the present embodiment, level shifting circuit comprises the first diode D1 and the second diode D2;
The negative pole of the first diode D1 is connected with the positive pole of the second diode D2;
The negative pole of the second diode D2 is connected with the input (port one) of the optical coupler U1 of photoelectric coupled circuit;
The output (port 3) of the optical coupler U1 of photoelectric coupled circuit is connected with MCU (not shown in Fig. 2), for exporting the switching signal of the magnetic switch collected.
In the present embodiment, the supply power voltage of magnetic switch is 5V; When magnetic switch does not touch magnetisable material, export the high level signal of 5V; When magnetic switch touches magnetisable material, export the low level signal of 1.7V; The conduction voltage drop of the first diode D1 and the second diode D2 is 0.6V-0.8V; The forward voltage drop of the optical coupler U1 of photoelectric coupled circuit is 1.0V.
Wherein, magnetic switch is connected with 5V power supply.SW_OUT is the output signal of magnetic switch.ANODE_IN is the output signal of output signal after level conversion (i.e. the first control signal) of magnetic switch, the input of this signal access optocoupler (i.e. optical coupler) U1.MCU_IN (switching signal of the magnetic switch namely collected) is through the input/output interface of the access of the signal after optocoupler process Micro-processor MCV.
In the present embodiment, photoelectric coupled circuit comprises: optical coupler U1, the first resistance R1 and the second resistance R2; The input of optical coupler U1 is connected with the negative pole of the second diode D2; The earth terminal (port 2) of optical coupler U1 is connected the first resistance R1; Feeder ear (port 4) the input 5V supply power voltage of optical coupler U1; The output (port 3) of optical coupler U1 is connected (not shown in Fig. 2) with one end of the second resistance R2 and MCU respectively; The other end ground connection of the second resistance R2.Wherein, the model of optical coupler is TLP521.
See Fig. 2, the course of work of this circuit is: the supply power voltage of magnetic switch is 5V, and the output signal of magnetic switch is through the diode (i.e. the first diode D1 and the second diode D2) of two series connection.Send into optical coupler again.Such one side is worked as magnetic switch and is touched magnetisable material, such as, when touching position corresponding to piston in cylinder, magnetic switch output signal SW_OUT is the voltage signal of about 1.7V, first diode and the second diode are all general-purpose diodes, and the conduction voltage drop of general-purpose diode is generally 0.6-0.8V, after two diode step-downs, the level of about 1.7V drops to 0.1V-0.5V, this voltage is less than the conduction voltage drop (i.e. the forward voltage drop 1.7V of optocoupler) of the diode in optocoupler, and now optocoupler can reliably be closed.Namely the level of the output signal ANODE_IN of SW_OUT signal after diode D1 and D2 is less than the conducting voltage of optocoupler U1, and optocoupler ends, therefore the level of the output signal MCU_IN of optocoupler (switching signal of magnetic switch) is 0V.On the other hand when magnetic switch does not touch magnetisable material, the level of output signal SW_OUT is about 5V, after diode D1, D2 step-down, the level of SW_OUT signal is 3.4V-3.8V, the forward voltage drop (1.7V) that this voltage is greater than optocoupler U1 makes follow-up optocoupler U1 conducting, and optical coupler output signal MCU_IN (switching signal of magnetic switch) is 5V.Such Micro-processor MCV just can collect the switching signal of magnetic switch, and carries out follow-up control operation.
Fig. 3 is the circuit diagram of the switching signal Acquisition Circuit of a kind of magnetic switch that one embodiment of the invention provides; See Fig. 3, in the present embodiment, level shifting circuit comprises: the 3rd voltage stabilizing didoe D3; The negative pole of the 3rd voltage stabilizing didoe D3 is connected with the output of magnetic switch; The positive pole of the 3rd voltage stabilizing didoe D3 is connected with the input of the optical coupler U2 of photoelectric coupled circuit; The output of the optical coupler U2 of photoelectric coupled circuit is for exporting the switching signal of the magnetic switch collected.The voltage stabilizing value of the 3rd voltage stabilizing didoe D3 is: 1.7V-3.3V.The supply power voltage of magnetic switch is 5V, when magnetic switch does not touch magnetisable material, exports the high level signal of 5V; When magnetic switch touches magnetisable material, export the low level signal of 1.7V; The forward voltage drop of the optical coupler U2 of photoelectric coupled circuit is 1.0V.
In the present embodiment, photoelectric coupled circuit comprises: optical coupler U1, the first resistance R1 and the second resistance R2; The input of optical coupler U2 is connected with the negative pole of the second diode D2; The earth terminal (port 2) of optical coupler U2 is connected the first resistance R1; Feeder ear (port 4) the input 5V supply power voltage of optical coupler U2; The output (port 3) of optical coupler U2 is connected with one end of the second resistance R2 and MCU (not shown in Fig. 3) respectively; The other end ground connection of the second resistance R2.
See Fig. 3, the course of work of this circuit is: by output series connection access the 3rd voltage stabilizing didoe D3 thus carry out step-down process to output signal at magnetic switch, wherein the 3rd voltage stabilizing didoe D3 higher than 1.7V, lower than 3.3V.Such one side is when the piston movement in cylinder is to the corresponding position of magnetic switch, magnetic switch touches the low level that magnetisable material exports 1.7V, this level is lower than the voltage stabilizing value of voltage-stabiliser tube D3, voltage stabilizing didoe D3 ends (namely exporting the first control signal), and cause follow-up optocoupler U2 to be in cut-off state, output signal MCU_IN (switching signal of the magnetic switch namely exported) voltage of corresponding optocoupler U2 is 0V, and the level that microprocessor detects is 0V.On the other hand when magnetic switch does not touch magnetisable material output high level (level of SW_OUT signal is about 5V), the level of the output signal ANODE_IN (i.e. the first control signal) after the 3rd voltage stabilizing didoe D3 is greater than the conduction voltage drop 1.0V of optocoupler, follow-up optocoupler U2 ON operation, the switching signal MCU_IN exporting magnetic switch is 5V high level signal, and the level that microprocessor detects is 5V.Such Micro-processor MCV just can collect the switching signal of magnetic switch, and carries out follow-up control operation.
Optical coupler conducting when ensureing that magnetic switch exports high level signal by the switching signal Acquisition Circuit of this magnetic switch of the present invention, export as optical coupler cut-off during low level signal, make the microprocessor of system the change of the change of the voltage signal of magnetic switch and open and close signal can be detected and and then judge the position of cylinder piston, to guarantee the normal work of system.
Present invention also offers a kind of atmospheric control, this atmospheric control comprises: Micro-processor MCV, magnetic switch, cylinder, gas path pipe, electromagnetically operated valve and aforesaid switching signal Acquisition Circuit; Electromagnetically operated valve for controlling the break-make of gas path pipe, during solenoid valve conduction, gas path pipe conducting, thus drive the piston movement of cylinder; Be provided with magnetisable material in the piston of cylinder, when the piston movement of cylinder is to the installed position of magnetic switch, magnetic switch closes, otherwise magnetic switch is in off-state; The output of switching signal Acquisition Circuit is connected with the input of Micro-processor MCV; The switching signal of the magnetic switch that Micro-processor MCV collects according to switching signal Acquisition Circuit controls solenoid valve conduction corresponding to described gas path pipe or closedown.This atmospheric control effectively can detect the switching signal of magnetic switch and can ensure the normal work of system, improves the stability of system.
The switching signal acquisition method the method that present invention also offers a kind of magnetic switch comprises:
Receive the signal of magnetic switch output and export the first control signal after step-down process is carried out to signal;
According to the optical coupler conducting in the first control signal control circuit or cut-off, thus export the switching signal of the magnetic switch collected.
In the present embodiment, receive signal that magnetic switch exports and export the first control signal after step-down process is carried out to signal and comprise:
Utilize the first diode and the second diode composition level shifting circuit, the positive pole of the first diode is connected with the output of magnetic switch, the positive pole of the negative pole of the first diode with the second diode is connected;
The input of the negative pole of the second diode with the optical coupler of photoelectric coupled circuit is connected; The output of the optical coupler of photoelectric coupled circuit is exported the switching signal of the magnetic switch collected.
In the present embodiment, receive signal that magnetic switch exports and export the first control signal after step-down process is carried out to signal and comprise:
Utilize the 3rd voltage stabilizing didoe composition level shifting circuit;
The negative pole of the 3rd voltage stabilizing didoe is connected with the output of magnetic switch; The positive pole of the 3rd voltage stabilizing didoe is connected with the input of the optical coupler of photoelectric coupled circuit; The output of the optical coupler of photoelectric coupled circuit is exported the switching signal of the magnetic switch collected.
In the present embodiment, the supply power voltage of magnetic switch is 5V; When magnetic switch does not touch magnetisable material, export the high level signal of 5V; When magnetic switch touches magnetisable material, export the low level signal of 1.7V; The conduction voltage drop of the first diode and the second diode is 0.6V-0.8V; The forward voltage drop of the optical coupler of photoelectric coupled circuit is 1.0V.
It should be noted that, the switching signal acquisition method of this magnetic switch of one embodiment of the invention is corresponding with the switching signal Acquisition Circuit part of above-mentioned magnetic switch, therefore, the specific implementation step of the switching signal acquisition method of this magnetic switch see the respective description of the switching signal Acquisition Circuit part of aforementioned magnetic switch, can not repeat them here.
To sum up, the switching signal Acquisition Circuit of this magnetic switch of the present invention carries out by the voltage signal exported magnetic switch the optical coupler that photoelectric coupled circuit is sent in step-down process again, like this when magnetic switch does not touch magnetisable material output high level signal, the voltage signal exported after the step-down process of level shifting circuit is still greater than the conducting of the forward voltage drop guarantee optical coupler of optical coupler, and microcontroller detects high level signal; When magnetic switch touches magnetisable material output for low level signal, the forward voltage drop that the voltage signal exported after the step-down process of level shifting circuit is less than optical coupler causes optical coupler to end, microcontroller detects low level signal, and then judge the position of cylinder piston to ensure the normal work of system according to the change of the change of the voltage signal of magnetic switch and open and close signal.
The foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.
Claims (10)
1. a switching signal Acquisition Circuit for magnetic switch, is characterized in that, described switching signal Acquisition Circuit comprises: level shifting circuit and photoelectric coupled circuit;
Described level shifting circuit, for receiving the signal of described magnetic switch output and exporting the first control signal to described photoelectric coupled circuit after carrying out step-down process to described signal;
Described photoelectric coupled circuit, for according to the optical coupler conducting in described first control signal control circuit or cut-off, thus exports the switching signal of the described magnetic switch collected.
2. the switching signal Acquisition Circuit of magnetic switch as claimed in claim 1, it is characterized in that, described level shifting circuit comprises: the first diode and the second diode;
The positive pole of described first diode is connected with the output of described magnetic switch, and the negative pole of described first diode is connected with the positive pole of described second diode;
The negative pole of described second diode is connected with the input of the optical coupler of described photoelectric coupled circuit;
The output of the optical coupler of described photoelectric coupled circuit exports the switching signal of the described magnetic switch collected.
3. the switching signal Acquisition Circuit of magnetic switch as claimed in claim 1, it is characterized in that, described level shifting circuit comprises: the 3rd voltage stabilizing didoe;
The negative pole of described 3rd voltage stabilizing didoe is connected with the output of described magnetic switch;
The positive pole of described 3rd voltage stabilizing didoe is connected with the input of the optical coupler of described photoelectric coupled circuit;
The output of the optical coupler of described photoelectric coupled circuit exports the switching signal of the described magnetic switch collected.
4. the switching signal Acquisition Circuit of magnetic switch as claimed in claim 2, it is characterized in that, the supply power voltage of described magnetic switch is 5V;
When described magnetic switch does not touch magnetisable material, export the high level signal of 5V;
When described magnetic switch touches magnetisable material, export the low level signal of 1.7V;
The conduction voltage drop of described first diode and the second diode is 0.6V-0.8V;
The forward voltage drop of the optical coupler of described photoelectric coupled circuit is 1.0V.
5. the switching signal Acquisition Circuit of magnetic switch as claimed in claim 3, it is characterized in that, the voltage stabilizing value of described 3rd voltage stabilizing didoe is: 1.7V-3.3V;
The supply power voltage of described magnetic switch is 5V,
When described magnetic switch does not touch magnetisable material, export the high level signal of 5V;
When described magnetic switch touches magnetisable material, export the low level signal of 1.7V;
The forward voltage drop of the optical coupler of described photoelectric coupled circuit is 1.0V.
6. an atmospheric control, is characterized in that, described atmospheric control comprises: the switching signal Acquisition Circuit of Micro-processor MCV, magnetic switch, cylinder, gas path pipe, electromagnetically operated valve and the magnetic switch as described in any one of claim 1-5;
Described electromagnetically operated valve for controlling the break-make of described gas path pipe, during solenoid valve conduction, gas path pipe conducting, thus the piston movement driving described cylinder;
Be provided with magnetisable material in the piston of described cylinder, when the piston movement of described cylinder is to the installed position of described magnetic switch, described magnetic switch closes, otherwise described magnetic switch is in off-state;
The output of described switching signal Acquisition Circuit is connected with the input of described Micro-processor MCV;
The switching signal of the described magnetic switch that described Micro-processor MCV collects according to described switching signal Acquisition Circuit controls described solenoid valve conduction corresponding to described gas path pipe or closedown.
7. a switching signal acquisition method for magnetic switch, is characterized in that, described method comprises:
Receive the signal of described magnetic switch output and export the first control signal after step-down process is carried out to described signal;
According to the optical coupler conducting in described first control signal control circuit or cut-off, thus export the switching signal of the described magnetic switch collected.
8. the switching signal acquisition method of magnetic switch as claimed in claim 7, is characterized in that, the signal that the described magnetic switch of described reception exports also exports the first control signal after carrying out step-down process to described signal and comprises:
Utilize the first diode and the second diode composition level shifting circuit, the described positive pole of the first diode is connected with the output of magnetic switch, the positive pole of the negative pole of described first diode with described second diode is connected;
The described negative pole of the second diode is connected with the input of the optical coupler of photoelectric coupled circuit;
The output of the optical coupler of described photoelectric coupled circuit is exported the switching signal of the described magnetic switch collected.
9. the switching signal acquisition method of magnetic switch as claimed in claim 7, is characterized in that, the signal that the described magnetic switch of described reception exports also exports the first control signal after carrying out step-down process to described signal and comprises:
Utilize the 3rd voltage stabilizing didoe composition level shifting circuit;
The negative pole of described 3rd voltage stabilizing didoe is connected with the output of described magnetic switch;
The positive pole of described 3rd voltage stabilizing didoe is connected with the input of the optical coupler of photoelectric coupled circuit;
The output of the optical coupler of described photoelectric coupled circuit is exported the switching signal of the described magnetic switch collected.
10. the switching signal acquisition method of magnetic switch as claimed in claim 8, it is characterized in that, the supply power voltage of described magnetic switch is 5V;
When described magnetic switch does not touch magnetisable material, export the high level signal of 5V;
When described magnetic switch touches magnetisable material, export the low level signal of 1.7V;
The conduction voltage drop of described first diode and the second diode is 0.6V-0.8V;
The forward voltage drop of the optical coupler of described photoelectric coupled circuit is 1.0V.
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Effective date of registration: 20240509 Address after: 266104 No. 500, Songling Road, Laoshan District, Qingdao, Shandong Patentee after: GOERTEK TECHNOLOGY Co.,Ltd. Country or region after: China Address before: 266061 5, 3 building, Fortune Plaza, 18 Qinling Mountains Road, Laoshan District, Qingdao, Shandong. Patentee before: QINGDAO GOERTEK TECHNOLOGY Co.,Ltd. Country or region before: China |