An elevator safety circuit detection training system
By designing an elevator safety circuit detection training system that includes calculation module, feedback module and display module, learning difficulties caused by the differences in structure of different elevator models are solved, and the number of fault switches is quickly identified and displayed, which improves students' learning efficiency.
Patent Information
- Application Number
- CN202510534021.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-27
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2045-04-27
AI Technical Summary
The existing elevator safety circuit detection training system cannot quickly adapt to the structural differences of different elevator models, resulting in students spending a lot of time understanding and positioning faulty switches during the learning process.
An elevator safety circuit detection training system is designed, including calculation module, feedback module and display module. Through components such as op amp, resistor, solid-state relay, etc., real-time calculation and recording of the total number of loop switches is realized, and automatic updates are automatically made, so as to quickly identify and display the number of fault switches.
It achieves rapid adaptation to the circuit differences of different elevator models, helps students quickly grasp the structure of elevator safety circuits and improves fault positioning efficiency.
Smart Images
Figure CN120048168B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of elevator safety circuit detection and training, and in particular to an elevator safety circuit detection and training system. Background Art
[0002] The safety circuit training system can be designed and arranged in a simulated small shaft according to the position of each switch in the actual elevator safety circuit, helping trainees learn the specific positions of each circuit switch in the elevator safety circuit in an environment without actual risks. By manually setting faults, trainees can more intuitively understand the status of the safety circuit when a fault occurs. However, due to the differences in safety circuit structures and the number of circuit switches of different elevator brands, trainees need to understand and learn the circuit differences of different elevator models. Therefore, an elevator safety circuit detection training system is proposed. It can enable trainees to quickly grasp the circuit differences of different elevator models through real-time updates of the total number of switches. It automatically calculates the number of all fault switches in the safety circuit (both manually set and non-manually set) to help trainees accelerate fault location and strengthen their understanding of the safety circuit structure. Summary of the Invention
[0003] In response to the above technical problems, the purpose of the present invention is to provide an elevator safety circuit detection training system, including a calculation module, which includes several operational amplifiers, several resistors, solid-state relays, capacitors, and diodes. Among the several operational amplifiers, the operational amplifier U2 is connected to one end of the resistor R8 and the IN4 terminal in the same phase, and to one end of the resistor R7 and the OUT2 terminal in the opposite phase, and the output terminal is connected to the other end of the resistor R7 and one end of the solid-state relay S2; the operational amplifier U3 is connected to one end of the resistor R9 and the other end of the solid-state relay S2 in the same phase, and to one end of the capacitor C1 and the cathode of the diode D1 in the opposite phase, and the output terminal is connected to the anode of the diode D1; the other end of the resistor R8 is connected to the IN1-2 terminal; the other end of the capacitor C1, the other end of the resistor R9, and the negative pole of the solid-state relay S2 are grounded.
[0004] Furthermore, the calculation module also includes several operational amplifiers, several resistors, solid-state relays, and triggers. Among the several operational amplifiers, the operational amplifier U6 is connected to one end of the resistor R10 and one end of the resistor R19 in the same phase, to one end of the resistor R11 and one end of the resistor R17 in the opposite phase, and the output is connected to the other end of the resistor R11 and one end of the solid-state relay S3; the operational amplifier U7 is connected to the cathode of the diode D1 in the same phase, and the output is connected to the other end of the resistor R10 in the opposite phase; the operational amplifier U8 is connected to the output end of the operational amplifier U2 in the same phase, and the output is connected to the other end of the resistor R17 in the opposite phase; the first pin and the fourth pin of the trigger U4 are connected to the power supply, the second pin is connected to the sixth pin, and the third pin is connected to the IN5 end; the other end of the solid-state relay S3 is connected to one end of the resistor R18; the other end of the resistor R18, the other end of the resistor R19, and the negative pole of the solid-state relay S3 are grounded.
[0005] Furthermore, the calculation module also includes a field effect tube, a capacitor, an operational amplifier, a solid-state relay, an inverter, and several resistors. The operational amplifier U9 among the several operational amplifiers is connected to one end of the resistor R16 and the drain of the field effect tube Q4 in the same phase, and is connected to one end of the resistor R14 and one end of the resistor R15 in the opposite phase, and the output end is connected to the positive pole of the solid-state relay S1; the input end of the inverter U5 is connected to the fifth pin of the trigger U4, the gate of the field effect tube Q4, one end of the resistor R12, and the positive pole of the solid-state relay S3, and the output end is connected to the positive pole of the solid-state relay S2; the source of the field effect tube Q4 is connected to the other end of the resistor R12, one end of the resistor R13, and one end of the capacitor C2; one end of the solid-state relay S1 is connected to the inverting end of the operational amplifier U3; the other end of the capacitor C2, the other end of the resistor R13, the other end of the resistor R14, the other end of the resistor R16, the other end of the solid-state relay S1, and the negative pole of the solid-state relay S1 are grounded.
[0006] Furthermore, it also includes a feedback module, which includes several resistors and operational amplifiers. Among the several operational amplifiers, the operational amplifier U1 is connected to one end of the resistor R6 and the IN2 terminal in the same phase, and to one end of the resistor R4 and one end of the resistor R5 in the opposite phase; the other end of the resistor R5 is connected to the power supply; the other end of the resistor R4 and the other end of the resistor R6 are grounded.
[0007] Furthermore, the feedback module also includes several field-effect transistors and several resistors. Among the field-effect transistors, the source of the field-effect transistor Q1 is connected to the OUT1 terminal, the drain is connected to one end of the resistor R2, and the gate is connected to the gate of the field-effect transistor Q2, the gate of the field-effect transistor Q3, and the output end of the operational amplifier U1; the drain of the field-effect transistor Q2 is connected to the IN1-1 terminal, and the source is connected to the other end of the resistor R2; the drain of the field-effect transistor Q3 is connected to the IN3 terminal, and the source is connected to one end of the resistor R1; the other end of the resistor R1 is grounded.
[0008] Furthermore, the feedback module further includes a resistor, one end of the resistor R3 is connected to the gate of the field effect transistor Q1, and the other end is grounded.
[0009] Furthermore, it also includes a display module, which is connected to the calculation module, and the display module displays the number status of loop switches in the safety loop based on the signal fed back by the calculation module.
[0010] The beneficial effects of the present invention compared with the prior art are:
[0011] The present invention can calculate and record the total number of circuit switches. When the number of switches is increased or decreased, the calculation and record are updated in real time, helping trainees quickly grasp the circuit differences of different elevator models. After manually setting the fault switch, the present invention automatically calculates the number of all fault switches in the safety circuit (both manual fault settings and non-manual fault settings) to help trainees accelerate fault location and strengthen their understanding of the safety circuit structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, a brief introduction is given below to the prior art and the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0013] Figure 1 This is a circuit diagram of the calculation module provided by the present invention.
[0014] Figure 2 This is a schematic diagram of the feedback module circuit provided by the present invention. DETAILED DESCRIPTION
[0015] In order to make the objects and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the embodiments. It should be understood that the following text is only used to describe one or several specific implementation methods of the present invention and does not strictly limit the scope of protection specifically requested by the present invention.
[0016] The present invention discloses an elevator safety circuit detection training system, including a calculation module, which includes several operational amplifiers, several resistors, a solid-state relay, a capacitor, and a diode. Among the several operational amplifiers, an operational amplifier U2 is connected to one end of a resistor R8 and an IN4 terminal in the same phase, to one end of a resistor R7 and an OUT2 terminal in the opposite phase, and to the other end of the resistor R7 and an OUT2 terminal in the output terminal; an operational amplifier U3 is connected to one end of a resistor R9 and the other end of the solid-state relay S2 in the same phase, to one end of a capacitor C1 and a cathode of a diode D1 in the opposite phase, and to an anode of the diode D1 in the output terminal; the other end of the resistor R8 is connected to an IN1-2 terminal; the other end of the capacitor C1, the other end of the resistor R9, and the negative electrode of the solid-state relay S2 are grounded.
[0017] Specifically, the calculation module also includes several operational amplifiers, several resistors, solid-state relays, and triggers. Among the several operational amplifiers, the operational amplifier U6 is connected to one end of the resistor R10 and one end of the resistor R19 in the same phase, to one end of the resistor R11 and one end of the resistor R17 in the opposite phase, and the output is connected to the other end of the resistor R11 and one end of the solid-state relay S3; the operational amplifier U7 is connected to the cathode of the diode D1 in the same phase, and the output is connected to the other end of the resistor R10 in the opposite phase; the operational amplifier U8 is connected to the output end of the operational amplifier U2 in the same phase, and the output is connected to the other end of the resistor R17 in the opposite phase; the first pin and the fourth pin of the trigger U4 are connected to the power supply, the second pin is connected to the sixth pin, and the third pin is connected to the IN5 end; the other end of the solid-state relay S3 is connected to one end of the resistor R18; the other end of the resistor R18, the other end of the resistor R19, and the negative pole of the solid-state relay S3 are grounded.
[0018] Specifically, the calculation module also includes a field effect tube, a capacitor, an operational amplifier, a solid-state relay, an inverter, and several resistors. The operational amplifier U9 among the several operational amplifiers is connected to one end of the resistor R16 and the drain of the field effect tube Q4 in the same phase, and to one end of the resistor R14 and one end of the resistor R15 in the opposite phase, and the output end is connected to the positive pole of the solid-state relay S1; the input end of the inverter U5 is connected to the fifth pin of the trigger U4, the gate of the field effect tube Q4, one end of the resistor R12, and the positive pole of the solid-state relay S3, and the output end is connected to the positive pole of the solid-state relay S2; the source of the field effect tube Q4 is connected to the other end of the resistor R12, one end of the resistor R13, and one end of the capacitor C2; one end of the solid-state relay S1 is connected to the inverting end of the operational amplifier U3; the other end of the capacitor C2, the other end of the resistor R13, the other end of the resistor R14, the other end of the resistor R16, the other end of the solid-state relay S1, and the negative pole of the solid-state relay S1 are grounded.
[0019] Specifically, it also includes a feedback module, which includes several resistors and operational amplifiers. The operational amplifier U1 among the several operational amplifiers is connected to one end of the resistor R6 and the IN2 terminal in the same phase, and to one end of the resistor R4 and one end of the resistor R5 in the opposite phase; the other end of the resistor R5 is connected to the power supply; the other end of the resistor R4 and the other end of the resistor R6 are grounded.
[0020] Specifically, the feedback module also includes several field-effect transistors and several resistors. Among the field-effect transistors, the source of the field-effect transistor Q1 is connected to the OUT1 terminal, the drain is connected to one end of the resistor R2, and the gate is connected to the gate of the field-effect transistor Q2, the gate of the field-effect transistor Q3, and the output end of the operational amplifier U1; the drain of the field-effect transistor Q2 is connected to the IN1-1 terminal, and the source is connected to the other end of the resistor R2; the drain of the field-effect transistor Q3 is connected to the IN3 terminal, and the source is connected to one end of the resistor R1; the other end of the resistor R1 is grounded.
[0021] Specifically, the feedback module further includes a resistor, one end of the resistor R3 is connected to the gate of the field effect transistor Q1, and the other end is grounded.
[0022] Specifically, it also includes a display module, which is connected to the calculation module. The display module displays the quantity status of loop switches in the safety loop based on the signal fed back by the calculation module.
[0023] See Figure 1 、 Figure 2There are multiple feedback modules. A feedback module is set between the two loop switches in series in the safety loop. No feedback module is set between the loop switches for maintenance. The IN1-1 terminals in all feedback modules synchronously obtain the reference basic signal of a single loop switch. When all the loop switches are connected in series and adjusted to a closed state, when power is turned on, the signal between each of the two loop switches in series is fed back to IN2 on the feedback module. The signal is fed to the ground terminal through resistor R6, and the signal at the resistor R6 terminal is fed back to the non-inverting terminal of the op amp U1. The power supply signal is fed to the ground terminal through resistors R5 and R4, and the signal at the resistor R4 terminal is fed back. Feed to the inverting terminal of the operational amplifier U1, the output of the operational amplifier U1, the output terminal signal of the operational amplifier U1 is fed back to the gate of the field effect tube Q1, the gate of the field effect tube Q2, and the gate of the field effect tube Q3. The voltage difference between the gate of the field effect tube Q1 and the source of the field effect tube Q1 is higher than the conduction threshold, the field effect tube Q1 is turned on, the voltage difference between the gate of the field effect tube Q2 and the source of the field effect tube Q2 is higher than the conduction threshold, the field effect tube Q2 is turned on, the voltage difference between the gate of the field effect tube Q3 and the source of the field effect tube Q3 is higher than the conduction threshold, the field effect tube Q3 is turned on, and the basic signal is fed back to the gate of the field effect tube Q2, the source of the field effect tube Q2, the resistor R2, and the field effect tube Q3. The drain of the field effect tube Q1 and the source of the field effect tube Q1 are fed back to the calculation module through OUT1. The resistor R3 is used to discharge the parasitic capacitance of the gate of the field effect tube Q1, the gate of the field effect tube Q2, and the gate of the field effect tube Q3. The IN1-2 terminal in the calculation module synchronously obtains the reference basic signal of the single loop switch. The signal is fed back to the non-inverting terminal of the operational amplifier U2 through the resistor R8. The output terminal of the operational amplifier U2 is negatively feedback connected to the inverting terminal of the operational amplifier U2 through the resistor R7. The IN4 in the calculation module is used to obtain the reference basic signal fed back by all feedback modules through OUT1. At the same time, the inverting terminal signal of the operational amplifier U2 is fed back through O UT2 is fed back to IN3 on all feedback modules. When IN2 in any feedback module receives a signal, field-effect transistors Q1, Q2, and Q3 are turned on, and the calculation module obtains the reference basic signal fed back by the feedback module through OUT1. At the same time, the IN3 end signal of the feedback module passes through the drain of the field-effect transistor Q3, the source of the field-effect transistor Q3, and the resistor R1 to the ground end. At this time, the signal amplitude of the output end of the operational amplifier U2 is the number of loop switches connected in series in the entire safety loop. In this way, the total number of loop switches in the safety loop is automatically calculated when the safety loop is powered on.
[0024] See Figure 1The output signal of op amp U2 is fed to the ground terminal through solid-state relay S2 and resistor R9. The signal at resistor R9 is fed back to the non-inverting terminal of op amp U3. The output signal of op amp U3 is fed back to the inverting terminal of op amp U3 through diode D1. Op amp U3 outputs, diode D1 prevents reverse, and the potential of capacitor C1 rises to the signal amplitude of the output of op amp U2. This records the total number of switches in series in the safety loop. When an artificial fault is set for any number of loop switches in the safety loop, IN2 in the feedback module between all loop switches connected in series downward from the fault loop switch closest to the signal input terminal of the safety loop loses signal feedback, op amp U1 is cut off, and the calculation module loses the reference basic signal fed back by the corresponding feedback module. The signal at the output of op amp U2 decreases. At this time, the signal amplitude of the output of op amp U2 is the number of loop switches that can transmit normally. After the automatic calculation of the total number of loop switches is completed, the total number of loop switches is recorded and the remaining number of loop switches that can transmit normally is automatically calculated when any number of fault loop switches are set.
[0025] See Figure 1IN5 is used to input the signal that the number of loop switches is set. This signal is fed back by the operator or the terminal. After the loop switches in the safety loop are connected in series and powered on, the signal is fed back to IN5. In the initial state, the 5-pin end of the trigger U4 is low level. When the IN5 end receives a signal and feeds back to the 3-pin end of the trigger U4, the 5-pin end of the trigger U4 is high level. The 5-pin end signal of the trigger U4 is fed back to the input end of the inverter U5. The inverter U5 inverts the input signal, and the output end signal of the inverter U5 is fed back to the positive terminal of the solid-state relay S2. The solid-state relay S2 is disconnected, and the 5-pin terminal signal of the trigger U4 is fed back to the positive pole of the solid-state relay S3. The solid-state relay S3 is closed, and the output terminal signal of the operational amplifier U2 is synchronously fed back to the non-inverting terminal of the operational amplifier U8. The output terminal of the operational amplifier U8 is negatively feedback connected to the inverting terminal of the operational amplifier U8. The output terminal of the operational amplifier U8 follows the output terminal signal of the operational amplifier U2. The output terminal signal of the operational amplifier U8 is fed back to the inverting terminal of the operational amplifier U6 through the resistor R17. The output terminal of the operational amplifier U6 is negatively feedback connected to the inverting terminal of the operational amplifier U6 through the resistor R11. The signal at the capacitor C1 terminal is fed back to the non-inverting terminal of the operational amplifier U7. The output of the operational amplifier U7 The terminal is negatively feedback connected to the inverting terminal of the operational amplifier U7. The output terminal of the operational amplifier U7 follows the signal of the output capacitor C1. The signal of the output terminal of the operational amplifier U7 is connected to the ground terminal through the resistor R10 and the resistor R19. The signal of the resistor R19 terminal is fed back to the non-inverting terminal of the operational amplifier U6. The difference between the amplitude of the total number of loop switches output by the operational amplifier U6 and the amplitude of the number of loop switches remaining that can be normally transmitted is obtained. The amplitude of the signal at the output terminal of the operational amplifier U6 is the number of existing fault loop switches in the safety loop (including loop switches set for human faults and loop switches set for non-human faults). The signal is transmitted through the solid-state relay S3 and the resistor R19. R18 is connected to the ground end, a display module is set in the system, the signal of the resistor R18 end is fed back to the display module, the signal of the output end of the operational amplifier U2 is synchronously fed back to the display module, and the signal of the capacitor C1 end is synchronously fed back to the display module. When the display module obtains the signal of the resistor R18 end, the number of faults of the loop switches in the current safety loop is displayed based on the amplitude of the signal. When the display module obtains the signal of the capacitor C1 end, the number of total loop switches in the current safety loop is displayed based on the amplitude of the signal. When the display module obtains the signal of the output end of the operational amplifier U2, the number of loop switches that can currently transmit normally is displayed based on the amplitude of the signal.
[0026] See Figure 1, the 5-pin signal of the trigger U4 is synchronously fed back to the gate of the field effect tube Q4, and the 5-pin signal of the trigger U4 is connected to the ground terminal through the resistor R12 and the resistor R13. When IN5 obtains a setting completion signal, the 5-pin terminal of the trigger U4 is high level, and the signal of the capacitor C2 terminal rises. When the total number of loop switches in the safety loop is increased or decreased, the amplitude of the signal at the output of the operational amplifier U2 changes accordingly. When the total number of loop switches in the safety loop is increased or decreased, all loop switches set for artificial faults in the safety loop must be released. After the increase or decrease of the total number of loop switches is completed, the operator or the terminal must feedback two setting completion signals. When the trigger U4 obtains the first setting completion signal after the total number of loop switches is increased or decreased, the solid-state relay S2 is closed, the solid-state relay S3 is disconnected, the 5-pin terminal of the trigger U4 is low level, the voltage difference between the gate of the field effect tube Q4 and the source of the field effect tube Q4 is lower than the conduction threshold, and the field effect tube Q4 is turned on. , the potential of capacitor C2 drops, and at the same time, the signal at capacitor C2 goes to ground through the source of field effect transistor Q4, the drain of field effect transistor Q4, and resistor R16. The signal at resistor R16 is fed back to the non-inverting terminal of op amp U9, and the power supply signal goes to ground through resistors R15 and R14. The signal at resistor R14 is fed back to the inverting terminal of op amp U9, and output by op amp U9. The signal at the output of op amp U9 is fed back to the positive electrode of solid-state relay S1, solid-state relay S1 is closed, and capacitor C1 reaches ground potential. When the signal at capacitor C2 is lower than the signal at resistor R14, op amp U9 is cut off, solid-state relay S1 is disconnected, and the amplitude of the signal at capacitor C1 rises to the amplitude of the signal at the output of op amp U2. In this way, after the increase or decrease of the number of loop switches is completed, the calculation module re-records the total number of loop switches. When trigger U4 obtains the second setting completion signal after the total number of loop switches is increased or decreased, solid-state relay S2 is disconnected and solid-state relay S3 is closed. At this time, the loop switch can be set for artificial fault.
[0027] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed therein. Any reference in a claim should not be construed as limiting the claim to which it relates.
Claims
1. An elevator safety circuit detection training system, characterized in that: The computing module includes a plurality of operational amplifiers, a plurality of resistors, a plurality of solid-state relays, a plurality of capacitors, a diode, a trigger, an inverter, and a field-effect transistor. The operational amplifier U2 among the plurality of operational amplifiers is connected to one end of the resistor R8 and the IN4 terminal in the same phase, to one end of the resistor R7 and the OUT2 terminal in the opposite phase, and to the other end of the resistor R7 and the solid-state relay S2 in the output terminal. The operational amplifier U3 is connected to one end of the resistor R9 and the other end of the solid-state relay S2 in the same phase, to one end of the capacitor C1 and the cathode of the diode D1 in the opposite phase, and to the anode of the diode D1 in the output terminal. The other end of the resistor R8 is connected to the IN1-2 terminal. The op amp U6 is connected to one end of resistor R10 and one end of resistor R19 in the same phase, and to one end of resistor R11 and one end of resistor R17 in the opposite phase. The output terminal is connected to the other end of resistor R11 and one end of solid-state relay S3. The op amp U7 is connected to the cathode of diode D1 in the same phase, and to the output terminal and the other end of resistor R10 in the opposite phase. The op amp U8 is connected to the output terminal of op amp U2 in the same phase, and to the output terminal and the other end of resistor R17 in the opposite phase. The first and fourth pins of trigger U4 are connected to the power supply, the second pin is connected to the sixth pin, and the third pin is connected to IN5. The other end of solid-state relay S3 is connected to one end of resistor R18. The op amp U9 is connected to one end of the in-phase terminal of the resistor R16 and the drain of the field effect tube Q4, and to one end of the inverting terminal of the resistor R14 and the resistor R15. The output terminal is connected to the positive electrode of the solid-state relay S1. The input terminal of the inverter U5 is connected to the fifth pin of the trigger U4, the gate of the field effect tube Q4, one end of the resistor R12, the positive electrode of the solid-state relay S3, and the output terminal is connected to the positive electrode of the solid-state relay S2. The source of the field effect tube Q4 is connected to the other end of the resistor R12, one end of the resistor R13, and one end of the capacitor C2. One end of the solid-state relay S1 is connected to the inverting terminal of the op amp U3. The capacitors C1, C2, resistor R9, and Resistors R13, R14, R16, R18, R19, and the other end of solid-state relay S1 are grounded; the negative terminals of solid-state relays S1, S2, and S3 are grounded; IN5 is used to input a signal indicating that the number of loop switches has been set. This signal is fed back to IN5 after the loop switches in the safety loop are connected in series and energized. IN4 in the calculation module is used to obtain a reference base signal fed back by OUT1 from all feedback modules. The signal at the inverting terminal of op amp U2 is fed back to IN3 on all feedback modules via OUT2. The feedback module includes a plurality of resistors, a plurality of field effect transistors, and an operational amplifier. The operational amplifier U1 in the plurality of operational amplifiers is connected to one end of the resistor R6 and the terminal IN2 in the same phase, and to one end of the resistor R4 and one end of the resistor R5 in the opposite phase; the other end of the resistor R5 is connected to the power supply; The source of field-effect transistor Q1 is connected to OUT1, the drain is connected to one end of resistor R2, and the gate is connected to the gate of field-effect transistor Q2, the gate of field-effect transistor Q3, and the output of op amp U1; the drain of field-effect transistor Q2 is connected to IN1-1, and the source is connected to the other end of resistor R2; the drain of field-effect transistor Q3 is connected to IN3, and the source is connected to one end of resistor R1; the other ends of resistors R1, R4, and R6 are grounded; a feedback module is set between the two loop switches connected in series in the safety loop, and the IN1-1 ends in all feedback modules synchronously obtain the reference basic signal of the single loop switch, and the basic signal is fed back to the calculation module through OUT1.
2. The elevator safety circuit detection training system according to claim 1 is characterized in that: The feedback module further includes a resistor, one end of the resistor R3 is connected to the gate of the field effect transistor Q1 , and the other end is grounded.
3. The elevator safety circuit detection training system according to claim 1 is characterized in that: It also includes a display module, which is connected to the calculation module. The display module displays the quantity status of loop switches in the safety loop based on the signal fed back by the calculation module.