Crane sudden stop response duration detection system

Abstract

The utility model provides a crane sudden stop response duration detection system which comprises a signal remote controller, a signal receiver, a central control module, a clock module, a first trigger module and a second trigger module, the signal remote controller is in wireless communication connection with the signal receiver, and the signal remote controller sends an instruction to the signal receiver to control the crane to start and stop. A start-stop switch is arranged on the signal remote controller; a start-stop switch on the signal remote controller is electrically connected with the input end of the first trigger module, and the output end of the first trigger module is electrically connected with the input end of the central control module for controlling the clock module to start timing; the signal output end of the signal receiver is electrically connected with the input end of the second trigger module, the output end of the second trigger module is electrically connected with the input end of the central control module, and the central control module is used for controlling the clock module to stop timing, so that operators can be helped to know the safety performance of the crane by measuring the sudden stop response time of the crane; therefore, safety accidents caused by slow response of the crane are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of crane emergency stop response detection, in particular to a crane emergency stop response duration detection system. Background Technique

[0002] In the fields of modern industrial production and construction, as a key lifting device, the safety and efficiency of cranes are directly related to production progress, personnel safety and overall operating costs. With the continuous progress of technology, crane equipment is gradually developing towards the direction of intelligence and automation. However, even so, various emergencies may still occur during its use, such as operation errors, mechanical failures or sudden changes in the external environment, etc., which may all lead to the occurrence of safety accidents.

[0003] A crane emergency stop system with the publication number of CN213950372U includes: a sliding contact wire, which includes a slideway and a current collector. The slideway is connected to a remote operation device and is used to receive the emergency stop signal of the remote operation device; the current collector is slidably connected to the slideway, and the current collector is connected to the under-voltage release coil of the power air switch in the control system of the crane. The emergency stop signal is transmitted through the current collector to make the under-voltage release coil lose power and disconnect the power supply of the crane.

[0004] At present, in the crane industry, it is impossible to accurately detect the emergency stop response time, resulting in operators being unable to understand the safety performance of the crane, thereby increasing the occurrence of safety accidents caused by the slow response of the crane. Content of the Utility Model

[0005] In view of this, the utility model proposes a crane emergency stop response duration detection system. By accurately measuring the emergency stop response time of the crane, it can help operators understand the safety performance of the crane, thereby avoiding safety accidents caused by the slow response of the crane.

[0006] The technical solution of the utility model is realized as follows: The utility model provides a crane emergency stop response duration detection system, which includes a signal remote controller, a signal receiver, a central control module, a clock module, a first trigger module and a second trigger module. Among them,

[0007] The signal remote controller is wirelessly communicatively connected to the signal receiver. The signal remote controller sends an instruction to the signal receiver to control the start and stop of the crane, and the signal remote controller is provided with a start-stop switch;

[0008] The start-stop switch on the signal remote controller is electrically connected to the input end of the first trigger module, and the output end of the first trigger module is electrically connected to the input end of the central control module, which is used to control the start of the clock module for timing;

[0009] The signal output terminal of the signal receiver is electrically connected to the input terminal of the second trigger module, and the output terminal of the second trigger module is electrically connected to the input terminal of the central control module, which is used to control the clock module to stop timing.

[0010] Based on the above technical solution, preferably, the first trigger module includes a connector CN1, a resistor R44, a resistor R43, and a capacitor C42. Among them, the connector CN1 is electrically connected to the start-stop switch of the signal remote control. The pins 3 and 4 of the connector CN1 are commonly grounded. The pin 1 of the connector CN1 is electrically connected to the resistor R44, the resistor R43, and the capacitor C42 respectively. The resistor R43 is connected to the power supply terminal.

[0011] Based on the above technical solution, preferably, the second trigger module includes a connector CN2, a bidirectional breakdown diode D2, a resistor R1, a resistor R2, a resistor R5, a Schottky diode D1, a Schottky diode D2, a comparator U5, a resistor R4, a resistor R6, a resistor R3, and a capacitor C1. Among them, the connector CN2 is electrically connected to both ends of the contact of the corresponding start-stop switch of the signal receiver 2. The pin 1 of the connector CN2 is electrically connected to one end of the resistor R1 and one end of the bidirectional breakdown diode D2 respectively. The other end of the resistor R1 is electrically connected to one end of the resistor R2 and one end of the resistor R5 respectively. The other end of the resistor R2 is electrically connected to the positive electrode of the Schottky diode D1, the negative electrode of the Schottky diode D2, and the positive-phase input terminal of the comparator U5 respectively. The inverting input terminal of the comparator U5 is electrically connected to the resistor R4 and the resistor R6 respectively. The output terminal of the comparator U5 is electrically connected to the resistor R3, the capacitor C1, and the central control module 3 respectively. The negative electrode of the Schottky diode D1, the other end of the resistor R4, the other end of the resistor R3, and the power supply terminal of the comparator U5 are respectively connected to the power supply terminal. The pins 3, 2, and 1 of the connector CN2 are all grounded. The other end of the bidirectional breakdown diode D2, the other end of the resistor R5, the positive electrode of the Schottky diode D2, the other end of the resistor R6, and the other end of the capacitor C1 are respectively grounded.

[0012] Based on the above technical solution, preferably, one end of the crystal oscillator Y1 of the clock module is electrically connected to the capacitor C12 and the output terminal of the central control module respectively, and the other end of the crystal oscillator Y1 is electrically connected to the capacitor C13 and the output terminal of the central control module respectively. The other ends of the capacitor C12 and the capacitor C13 are commonly grounded.

[0013] Based on the above technical solution, preferably, it further includes a reset module, and the reset module is electrically connected to the input terminal of the central control module, which is used to reset the clock module.

[0014] Based on the above technical solutions, preferably, the reset module includes a capacitor C34, a reset button SW1, and a resistor R22. Among them, the input end of the central control module is electrically connected to one end of the capacitor C34, the reset button SW1, and the resistor R22 respectively. The other end of the resistor R22 is grounded, and the other ends of the capacitor C34 and the reset button SW1 are commonly connected to the power supply terminal.

[0015] Based on the above technical solutions, preferably, it further includes a display module. The input end of the display module is electrically connected to the output end of the central control module and is used to display the response duration.

[0016] Based on the above technical solutions, preferably, the display module includes a communication chip U4, a transient diode D11, a diode D13, and a diode D14. The pin 3 and pin 4 of the communication chip U4 are both electrically connected to the output end of the central control module. The pin 11 of the communication chip U4 is electrically connected to one end of the transient diode D11 respectively. The pin 10 of the communication chip U4 is electrically connected to the positive electrode of the diode D13 and the negative electrode of the diode D14 respectively. The negative electrode of the diode D13 and the positive electrode of the diode D14 are electrically connected to the other end of the transient diode D11. The other end of the transient diode D11 and the other end of the diode D14 are both electrically connected to an external display.

[0017] Based on the above technical solutions, preferably, it further includes a step-down module. The input end of the step-down module is electrically connected to an external power supply. The output module of the step-down module is electrically connected to the clock module, the first trigger module, and the second trigger module respectively and is used to provide voltage.

[0018] Based on the above technical solutions, preferably, the step-down module includes a voltage conversion chip U2, a capacitor C11, a capacitor C10, a capacitor C8, and a capacitor C9. Among them, the input end of the external power supply is electrically connected to the capacitor C10, the capacitor C11, and the pin 1 and pin 2 of the voltage conversion chip U2 respectively. The other end of the capacitor C10, the other end of the capacitor C11, and the pin 2 of the voltage conversion chip U2 are commonly grounded. The pin 5 of the voltage conversion chip U2 is electrically connected to the capacitor C8, the capacitor C9, and the output end of the step-down module respectively. The other end of the capacitor C8, the other end of the capacitor C9, and the pin 4 of the voltage conversion chip U2 are commonly grounded. The output end of the step-down module serves as the power supply terminal for the clock module, the first trigger module, and the second trigger module.

[0019] The crane emergency stop response duration detection system of the present utility model has the following beneficial effects compared with the prior art:

[0020] (1) When the emergency stop button in the start-stop switch is pressed, the first trigger module receives the trigger signal and transmits it to the central control module. The central control module controls the clock module to start timing. After the signal receiver receives the signal that the crane has stopped, it transmits this signal to the second trigger module, and the second trigger module then transmits this signal to the central control module as the signal to stop timing. After receiving this signal, the central control module controls the clock module to stop timing. The time difference between the two time points is the emergency stop response time of the crane. By accurately measuring the emergency stop response time of the crane, it can help operators and maintenance personnel understand the safety performance of the crane, thereby avoiding safety accidents caused by slow crane response.

[0021] (2) The bidirectional breakdown diode D2 plays a role in overvoltage protection in the circuit. When the voltage exceeds its breakdown voltage, the bidirectional breakdown diode D2 will conduct and divert the overvoltage to the ground, thereby protecting the circuit from overvoltage impact. Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 It is the flowchart of the crane emergency stop response duration detection system of the present invention;

[0024] Figure 2 It is the circuit diagram of the hollow module of the crane emergency stop response duration detection system of the present invention;

[0025] Figure 3 It is the circuit diagram of the first trigger module of the crane emergency stop response duration detection system of the present invention;

[0026] Figure 4 It is the circuit diagram of the second trigger module of the crane emergency stop response duration detection system of the present invention;

[0027] Figure 5 It is the circuit diagram of the clock module of the crane emergency stop response duration detection system of the present invention;

[0028] Figure 6 It is the circuit diagram of the reset module of the crane emergency stop response duration detection system of the present invention;

[0029] Figure 7 It is the circuit diagram of the display module of the crane emergency stop response duration detection system of the present invention;

[0030] Figure 8 This is the circuit diagram of the step-down module of the emergency stop response duration detection system for the crane of the present utility model. Specific embodiments

[0031] Next, in combination with the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0032] As Figure 1-2 shown, an emergency stop response duration detection system for a crane of the present utility model includes a signal remote controller 1, a signal receiver 2, a central control module 3, a clock module 4, a first trigger module 5, and a second trigger module 6. Among them, the signal remote controller 1 is wirelessly communicatively connected to the signal receiver 2. The signal remote controller 1 sends instructions to the signal receiver 2 to control the start and stop of the crane, and there is a start / stop switch on the signal remote controller 1; the start / stop switch on the signal remote controller 1 is electrically connected to the input end of the first trigger module 5, and the output end of the first trigger module 5 is electrically connected to the input end of the central control module 3 for controlling the start of the clock module 4 for timing; the signal output end of the signal receiver 2 is electrically connected to the input end of the second trigger module 6, and the output end of the second trigger module 6 is electrically connected to the input end of the central control module 3 for controlling the stop of the clock module 4 for timing.

[0033] It should be noted that the signal remote controller 1 and the signal receiver 2 are wirelessly communicatively connected, allowing the signal remote controller 1 to send instructions to the signal receiver 2 to control the start and stop of the crane. The start / stop switch on the signal remote controller 1 is electrically connected to the input end of the first trigger module 5. When the operator presses the emergency stop button in the start / stop switch, the first trigger module 5 receives the trigger signal and transmits it to the central control module 3. The central control module 3 then controls the clock module 4 to start timing and records the time point when the emergency stop instruction is issued. After the signal receiver 2 receives the signal that the crane has stopped, it transmits this signal to the second trigger module 6, and the second trigger module 6 then transmits this signal to the central control module 3 as the signal for stopping timing; after receiving this signal, the central control module 3 controls the clock module 4 to stop timing. After receiving the signals for starting and stopping timing, the clock module 4 calculates the time difference between the two time points, that is, the emergency stop response time of the crane.

[0034] In this embodiment, by accurately measuring the emergency stop response time of the crane, it can help the operator understand the safety performance of the crane, thereby avoiding safety accidents caused by the slow response of the crane.

[0035] As shown Figure 3 in FIG. Figure 3 , the first trigger module 5 in this embodiment includes a connector CN1, a resistor R44, a resistor R43, and a capacitor C42. Among them, the connector CN1 is electrically connected to the start-stop switch of the signal remote controller 1. The pins 3 and 4 of the connector CN1 are commonly grounded. The pin 1 of the connector CN1 is electrically connected to the resistor R44, the resistor R43, and the capacitor C42 respectively. The resistor R43 is connected to the power supply terminal.

[0036] It should be noted that the connector CN1 serves as a signal input terminal and is connected to the start-stop switch of the signal remote controller 1. When the operator presses the emergency stop button, the signal state received by this pin will change, that is, from high level to low level. Inside the first trigger module 5, the resistors R44, R43, and the capacitor C42 condition and filter the signal. The conditioned signal is sent to the central control module 3 to trigger the clock module 4 to start timing.

[0037] As shown Figure 4 in FIG. Figure 4 , the second trigger module 6 in this embodiment includes a connector CN2, a bidirectional breakdown diode D2, a resistor R1, a resistor R2, a resistor R5, a Schottky diode D1, a Schottky diode D2, a comparator U5, a resistor R4, a resistor R6, a resistor R3, and a capacitor C1. Among them, the connector CN2 is electrically connected to both ends of the contact of the corresponding start-stop switch of the signal receiver 2. The pin 1 of the connector CN2 is electrically connected to one end of the resistor R1 and one end of the bidirectional breakdown diode D2 respectively. The other end of the resistor R1 is electrically connected to one end of the resistor R2 and one end of the resistor R5 respectively. The other end of the resistor R2 is electrically connected to the positive electrode of the Schottky diode D1, the negative electrode of the Schottky diode D2, and the positive-phase input terminal of the comparator U5 respectively. The inverting input terminal of the comparator U5 is electrically connected to the resistor R4 and the resistor R6 respectively. The output terminal of the comparator U5 is electrically connected to the resistor R3, the capacitor C1, and the central control module 3 respectively. The negative electrode of the Schottky diode D1, the other end of the resistor R4, the other end of the resistor R3, and the power supply terminal of the comparator U5 are respectively connected to the power supply terminal. The pins 3, 2, and 1 of the connector CN2 are all grounded. The other end of the bidirectional breakdown diode D2, the other end of the resistor R5, the positive electrode of the Schottky diode D2, the other end of the resistor R6, and the other end of the capacitor C1 are respectively grounded.

[0038] It should be noted that when the crane receives an emergency stop instruction, the state of the corresponding emergency stop contact will change, from the closed state to the open state, and then from high level to low level. Among them, for the transient voltage generated when the contact is disconnected, the bidirectional breakdown diode D2 can play a protective role in the circuit. The resistor R3 and the capacitor C1 form a filter circuit to smooth the output signal of the comparator U5 and reduce noise interference.

[0039] The connection terminal CN2 receives the start-stop switch signal from the signal receiver 2. The signal is transmitted through the resistor R1 and the bidirectional breakdown diode D2. D2 is used to protect the circuit from overvoltage impact. The resistors R1, R2, and R5 form a voltage-dividing circuit, which divides the received signal and sends it to the non-inverting input terminal of the comparator U5. At the same time, the resistors R4 and R6 also form a voltage-dividing circuit to provide a reference voltage for the inverting input terminal of the comparator U5. The comparator U5 compares the voltage magnitudes of the non-inverting input terminal and the inverting input terminal, and outputs a low level according to the comparison result. The output terminal of the comparator U5 is connected to the central control module 3 through the resistor R3 to transmit the processed signal to the central control module. The capacitor C1 is used to filter out the high-frequency noise in the output signal to ensure the stability and accuracy of the signal. The other ends of the Schottky diodes D1 and D2, the other end of the resistor R4, the other end of the resistor R3, and the power supply terminal of the comparator U5 are all connected to the power supply terminal to provide a stable power supply for the circuit.

[0040] As Figure 5 shown, in this embodiment, one end of the crystal oscillator Y1 of the clock module 4 is electrically connected to the capacitor C12 and the output terminal of the central control module 3 respectively, and the other end of the crystal oscillator Y1 is electrically connected to the capacitor C13 and the output terminal of the central control module 3 respectively. The other ends of the capacitor C12 and the capacitor C13 are commonly grounded.

[0041] As Figure 6 shown, it further includes a reset module 7. The reset module 7 is electrically connected to the input terminal of the central control module 3 and is used to reset the clock module 4.

[0042] As a preferred embodiment, the reset module 7 in this embodiment includes a capacitor C34, a reset button SW1, and a resistor R22. Among them, the input terminal of the central control module 3 is electrically connected to one end of the capacitor C34, the reset button SW1, and the resistor R22 respectively. The other end of the resistor R22 is grounded, and the other ends of the capacitor C34 and the reset button SW1 are commonly connected to the power supply terminal.

[0043] It should be noted that after each test is completed, the clock module 4 can be reset by pressing the reset button SW1, which is convenient for the next test.

[0044] As Figure 7 shown, it further includes a display module 8. The input terminal of the display module 8 is electrically connected to the output terminal of the central control module 3 and is used to display the response duration.

[0045] As a preferred embodiment, the display module 8 in this embodiment includes a communication chip U4, a transient diode D11, a diode D13, and a diode D14. The pin 3 and pin 4 of the communication chip U4 are both electrically connected to the output end of the central control module 3. The pin 11 of the communication chip U4 is electrically connected to one end of the transient diode D11 respectively. The pin 10 of the communication chip U4 is electrically connected to the positive electrode of the diode D13 and the negative electrode of the diode D14 respectively. The negative electrode of the diode D13 and the positive electrode of the diode D14 are electrically connected to the other end of the transient diode D11. The other end of the transient diode D11 and the other end of the diode D14 are both electrically connected to an external display.

[0046] It should be noted that after receiving the signals for starting and stopping timing, the clock module 4 calculates the time difference between two time points, that is, the emergency stop response time of the crane, and sends the emergency stop response time of the crane to an external display through the display module 8 for display, which is convenient for testers to observe.

[0047] As Figure 8 shown, it further includes a buck module 9. The input end of the buck module 9 is electrically connected to an external power supply. The output module of the buck module 9 is electrically connected to the clock module 4, the first trigger module 5, and the second trigger module 6 respectively, for providing voltage.

[0048] As a preferred embodiment, the buck module 9 in this embodiment includes a voltage conversion chip U2, a capacitor C11, a capacitor C10, a capacitor C8, and a capacitor C9. Among them, the input end of the external power supply is electrically connected to the capacitor C10, the capacitor C11, and the pins 1 and 2 of the voltage conversion chip U2 respectively. The other end of the capacitor C10, the other end of the capacitor C11, and the pin 2 of the voltage conversion chip U2 are commonly grounded. The pin 5 of the voltage conversion chip U2 is electrically connected to the capacitor C8, the capacitor C9, and the output end of the buck module 9 respectively. The other end of the capacitor C8, the other end of the capacitor C9, and the pin 4 of the voltage conversion chip U2 are commonly grounded. The output end of the buck module 9 serves as the power supply terminal for the clock module 4, the first trigger module 5, and the second trigger module 6.

[0049] It should be noted that the buck module 9 is responsible for converting the voltage provided by the external power supply into a stable voltage suitable for the internal circuits such as the clock module 4, the first trigger module 5, and the second trigger module 6 to work.

[0050] Working principle:

[0051] The connection terminal CN1 serves as a signal input end and is connected to the start-stop switch of the signal remote controller 1. When the operator presses the emergency stop button, the signal state received by this pin will change, that is, from high level to low level. The low-level signal is sent to the central control module 3 to trigger the clock module 4 to start timing. When the crane receives the emergency stop instruction, the state of the corresponding emergency stop contact will change, from the closed state to the open state, and then from high level to low level. The low level is transmitted to the central control module 3 through the optocoupler to trigger the clock module 4 to stop timing. After receiving the signals for starting and stopping timing, the clock module 4 calculates the time difference between the two time points, that is, the emergency stop response time of the crane, and sends the emergency stop response time of the crane to the external display through the display module 8 for display.

[0052] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A detection system for the emergency stop response duration of a crane, characterized in that, It includes a signal remote controller (1), a signal receiver (2), a central control module (3), a clock module (4), a first trigger module (5) and a second trigger module (6). Among them, the signal remote controller (1) is wirelessly communicatively connected to the signal receiver (2). The signal remote controller (1) sends instructions to the signal receiver (2) to control the start and stop of the crane, and there is a start-stop switch on the signal remote controller (1); the start-stop switch on the signal remote controller (1) is electrically connected to the input end of the first trigger module (5), and the output end of the first trigger module (5) is electrically connected to the input end of the central control module (3), which is used to control the start of the clock module (4) timing; the signal output end of the signal receiver (2) is electrically connected to the input end of the second trigger module (6), and the output end of the second trigger module (6) is electrically connected to the input end of the central control module (3), which is used to control the stop of the clock module (4) timing.

2. The crane emergency stop response duration detection system according to claim 1, wherein: The first trigger module (5) includes a connector CN1, a resistor R44, a resistor R43 and a capacitor C42. Among them, the connector CN1 is electrically connected to the start-stop switch of the signal remote controller (1). The pins 3 and 4 of the connector CN1 are commonly grounded. The pin 1 of the connector CN1 is electrically connected to the resistor R44, the resistor R43 and the capacitor C42 respectively, and the resistor R43 is connected to the power supply terminal.

3. The crane emergency stop response duration detection system according to claim 2, wherein: The second trigger module (6) includes a connector CN2, a bidirectional breakdown diode D2, a resistor R1, a resistor R2, a resistor R5, a Schottky diode D1, a Schottky diode D2, a comparator U5, a resistor R4, a resistor R6, a resistor R3 and a capacitor C1. Among them, the connector CN2 is electrically connected to both ends of the contact corresponding to the start-stop switch of the signal receiver (2). The pin 1 of the connector CN2 is electrically connected to one end of the resistor R1 and the bidirectional breakdown diode D2 respectively. The other end of the resistor R1 is electrically connected to one end of the resistor R2 and the resistor R5 respectively. The other end of the resistor R2 is electrically connected to the positive pole of the Schottky diode D1, the negative pole of the Schottky diode D2 and the positive-phase input end of the comparator U5 respectively. The inverting input end of the comparator U5 is electrically connected to the resistor R4 and the resistor R6 respectively. The output end of the comparator U5 is electrically connected to the resistor R3, the capacitor C1 and the central control module (3) respectively. The negative pole of the Schottky diode D1, the other end of the resistor R4, the other end of the resistor R3 and the power supply terminal of the comparator U5 are respectively connected to the power supply terminal. The pins 3, 2 and 1 of the connector CN2 are all grounded. The other end of the bidirectional breakdown diode D2, the other end of the resistor R5, the positive pole of the Schottky diode D2, the other end of the resistor R6 and the other end of the capacitor C1 are respectively grounded.

4. The emergency stop response duration detection system for a crane according to claim 3, characterized in that: One end of the crystal oscillator Y1 of the clock module (4) is electrically connected to the capacitor C12 and the output end of the central control module (3) respectively, and the other end of the crystal oscillator Y1 is electrically connected to the capacitor C13 and the output end of the central control module (3) respectively. The other ends of the capacitor C12 and the capacitor C13 are commonly grounded.

5. The crane emergency stop response duration detection system according to claim 4, wherein: It further includes a reset module (7), and the reset module (7) is electrically connected to the input end of the central control module (3) for resetting the clock module (4).

6. The crane emergency stop response duration detection system according to claim 5, wherein: The reset module (7) includes a capacitor C34, a reset button SW1, and a resistor R22. Among them, the input end of the central control module (3) is electrically connected to one end of the capacitor C34, the reset button SW1, and the resistor R22 respectively. The other end of the resistor R22 is grounded, and the other ends of the capacitor C34 and the reset button SW1 are commonly connected to the power supply terminal for power supply.

7. The crane emergency stop response duration detection system according to claim 6, characterized in that: It further includes a display module (8), and the input end of the display module (8) is electrically connected to the output end of the central control module (3) for displaying the response duration.

8. The emergency stop response duration detection system for a crane according to claim 7, characterized in that: The display module (8) includes a communication chip U4, a transient diode D11, a diode D13, and a diode D14. The pin 3 and pin 4 of the communication chip U4 are both electrically connected to the output end of the central control module (3). The pin 11 of the communication chip U4 is electrically connected to one end of the transient diode D11 respectively. The pin 10 of the communication chip U4 is electrically connected to the positive electrode of the diode D13 and the negative electrode of the diode D14 respectively. The negative electrode of the diode D13 and the positive electrode of the diode D14 are electrically connected to the other end of the transient diode D11. The other end of the transient diode D11 and the other end of the diode D14 are both electrically connected to an external display.

9. The crane emergency stop response duration detection system according to claim 8, wherein: It further includes a step-down module (9). The input end of the step-down module (9) is electrically connected to an external power supply, and the output module of the step-down module (9) is electrically connected to the clock module (4), the first trigger module (5), and the second trigger module (6) respectively for providing voltage.

10. The crane emergency stop response duration detection system according to claim 9, wherein: The step-down module (9) includes a voltage conversion chip U2, a capacitor C11, a capacitor C10, a capacitor C8, and a capacitor C9. Among them, the input end of the external power supply is electrically connected to the capacitor C10, the capacitor C11, and the pin 1 and pin 2 of the voltage conversion chip U2 respectively. The other end of the capacitor C10, the other end of the capacitor C11, and the pin 2 of the voltage conversion chip U2 are commonly grounded. The pin 5 of the voltage conversion chip U2 is electrically connected to the capacitor C8, the capacitor C9, and the output end of the step-down module (9) respectively. The other end of the capacitor C8, the other end of the capacitor C9, and the pin 4 of the voltage conversion chip U2 are commonly grounded. The output end of the step-down module (9) serves as the power supply terminal for the clock module (4), the first trigger module (5), and the second trigger module (6).

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