Brake pipe protection circuit and electronic equipment

Abstract

The utility model discloses a brake pipe protection circuit and electronic equipment, and the brake pipe protection circuit comprises a voltage drop detection module which is configured to receive a voltage drop signal, and the voltage drop signal is a voltage signal at the two ends of a brake pipe; the control detection module is configured to receive a control signal, and the control signal is a voltage signal of the control end of the brake pipe; the first protection module is connected with the voltage drop detection module and the control detection module, and the first protection module is configured to send out a first reminding signal when the voltage drop signal and the control signal are both high-level signals; and the second protection module is connected with the voltage drop detection module and the control detection module, and the second protection module is configured to send out a second reminding signal when the voltage drop signal and the control signal are both low-level signals. By means of the mode, the effective fault information can be sent out when the equipment breaks down.

Description

Technical Field

[0001] This application relates to the field of electronic circuits, and particularly to a braking tube protection circuit and an electronic device. Background Art

[0002] In an inertial load device with a motor, when the large inertia load device makes an emergency stop, the energy fed back under the power generation condition of the motor impacts the device or the external braking resistor fails, resulting in abnormal operation of the device. If the device cannot effectively report a fault after abnormal operation, it will lead to more serious device damage or even problems such as explosion of the machine. Summary of the Utility Model

[0003] To solve the above problems, this application provides a braking tube protection circuit, which can effectively report information related to the device fault when an inertial load device with a motor fails.

[0004] One technical solution adopted by this application is: to provide a braking tube protection circuit, which includes: a voltage drop detection module configured to receive a voltage drop signal, where the voltage drop signal is a voltage signal across the braking tube; a control detection module configured to receive a control signal, where the control signal is a voltage signal at the control end of the braking tube; a first protection module connected to the voltage drop detection module and the control detection module, and the first protection module is configured to issue a first reminder signal when both the voltage drop signal and the control signal are high-level signals; a second protection module connected to the voltage drop detection module and the control detection module, and the second protection module is configured to issue a second reminder signal when both the voltage drop signal and the control signal are low-level signals.

[0005] In one embodiment, the voltage drop detection module includes: a first diode, the cathode of the first diode is configured to receive the voltage drop signal; a second diode, the cathode of the second diode is connected to the anode of the first diode, and the anode of the second diode is connected to the first protection module; a third diode, the cathode of the third diode is connected to the anode of the first diode, and the anode of the third diode is connected to the second protection module.

[0006] In one embodiment, the control detection module includes: a fourth diode, the cathode of the fourth diode is configured to receive the control signal, and the anode of the fourth diode is connected to the first protection module; a first switching tube, the control end of the first switching tube is configured to receive the control signal, the first end of the first switching tube is connected to the second protection module, and the second end of the first switching tube is grounded.

[0007] In one embodiment, the first protection module includes: a first optocoupler, the anode of the primary side diode of the first optocoupler receives a reference voltage signal; a first resistor, the first end of the first resistor is connected to the anode of the primary side diode of the first optocoupler, and the second end of the first resistor is connected to the cathode of the primary side diode of the first optocoupler; a first control unit, connected to the anode of the second diode and the anode of the fourth diode, the first control unit is configured to pull down the voltage of the cathode of the primary side diode of the first optocoupler when the voltages at the anode of the second diode and the anode of the fourth diode are both high, so that the first end and the second end of the secondary side of the first optocoupler are turned on, thereby emitting a first reminder signal.

[0008] In one embodiment, the first control unit includes: a voltage dividing module, the first end of the voltage dividing module is configured to input a reference voltage signal, the second end of the voltage dividing module is grounded, the first voltage dividing node of the voltage dividing module is connected to the anode of the second diode, and the second voltage dividing node of the voltage dividing module is connected to the anode of the fourth diode; wherein, the voltage of the second voltage dividing node is less than the voltage of the first voltage dividing node; a second switching tube, the control end of the second switching tube is connected to the second voltage dividing node, the first end of the second switching tube is connected to the cathode of the primary side diode of the first optocoupler, and the second end of the second switching tube is grounded.

[0009] In one embodiment, the first protection module further includes: a second resistor, the first end of the second resistor is configured to receive a reference voltage signal, and the second end of the second resistor is connected to the anode of the primary side diode of the first optocoupler; a first capacitor, the first end of the first capacitor is connected to the first end of the second resistor, and the second end of the first capacitor is grounded.

[0010] In one embodiment, the voltage drop detection module further includes: a second capacitor, the first end of the second capacitor is connected to the cathode of the fourth diode; a third resistor, the first end of the third resistor is connected to the second end of the second capacitor, and the second end of the third resistor is grounded; a third switching tube, the control end of the third switching tube is connected to the second end of the second capacitor, the first end of the third switching tube is connected to the anode of the fourth diode, and the second end of the third switching tube is grounded.

[0011] In one embodiment, the second protection module includes: a second optocoupler, the anode of the primary side diode of the second optocoupler receives a reference voltage signal; a fourth resistor, the first end of the fourth resistor is connected to the anode of the primary side diode of the second optocoupler and the first end of the first switching tube, and the second end of the fourth resistor is connected to the cathode of the primary side diode of the second optocoupler and the anode of the third diode.

[0012] In one embodiment, the second protection module further includes: a fifth resistor, the first end of the fifth resistor is configured to receive a reference voltage signal, and the second end of the fifth resistor is connected to the anode of the primary side diode of the second optocoupler; a third capacitor, the first end of the third capacitor is connected to the first end of the fifth resistor, and the second end of the third capacitor is grounded.

[0013] In one embodiment, the control detection module further includes: a sixth resistor, a first end of the sixth resistor is configured to receive a control signal, and a second end of the sixth resistor is connected to a control end of the first switching tube; a fourth capacitor, a first end of the fourth capacitor is connected to the first end of the sixth resistor, and a second end of the fourth capacitor is connected to the second end of the sixth resistor; a seventh resistor, a first end of the seventh resistor is connected to the control end of the first switching tube, and a second end of the seventh resistor is grounded; a fifth capacitor, a first end of the fifth capacitor is connected to the control end of the first switching tube, and a second end of the fifth capacitor is grounded.

[0014] Another technical solution adopted in this application is: to provide an electronic device, which includes the above-mentioned braking tube and braking tube protection circuit.

[0015] The braking tube protection circuit provided in this application includes: a voltage drop detection module, configured to receive a voltage drop signal, and the voltage drop signal is a voltage signal across the braking tube; a control detection module, configured to receive a control signal, and the control signal is a voltage signal at the control end of the braking tube; a first protection module, connected to the voltage drop detection module and the control detection module, and the first protection module is configured to issue a first reminder signal when both the voltage drop signal and the control signal are high-level signals; a second protection module, connected to the voltage drop detection module and the control detection module, and the second protection module is configured to issue a second reminder signal when both the voltage drop signal and the control signal are low-level signals.

[0016] By the above method, when the large inertia load device makes an emergency stop, the energy generated by the motor during power generation feedback impacts the device or the external braking resistor fails, resulting in abnormal operation of the device. By detecting the levels of the voltage drop signal and the control signal, different reminder signals are controlled to be issued by the protection module, so that the device fault information can be effectively reported. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Among them:

[0019] Figure 1 is a schematic structural diagram of the first embodiment of the braking tube protection circuit provided in this application;

[0020] Figure 2 is a schematic structural diagram of the second embodiment of the braking tube protection circuit provided in this application;

[0021] Figure 3 is a schematic structural diagram of the third embodiment of the braking tube protection circuit provided in this application;

[0022] Figure 4 It is a schematic structural diagram of the fourth embodiment of the brake pipe protection circuit provided by the present application;

[0023] Figure 5 It is a specific schematic diagram of the fifth embodiment of the brake pipe protection circuit provided by the present application.

[0024] Figure 6 It is a specific schematic diagram of the sixth embodiment of the brake pipe protection circuit provided by the present application.

[0025] Figure 7 It is a schematic structural diagram of an embodiment of an electronic device provided by the present application. Specific Embodiments

[0026] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. In addition, it should be noted that, for the sake of description, only parts related to the present application are shown in the accompanying drawings rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0027] The terms "first", "second", etc. in the present application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0028] Referring to "embodiment" in this context means that a specific feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0029] Refer to Figure 1 , Figure 1 It is a schematic structural diagram of the first embodiment of the brake pipe protection circuit provided by the present application. The brake pipe protection circuit 1000 includes a voltage drop detection module 100, a control detection module 200, a first protection module 300, and a second protection module 400.

[0030] Among them, the pressure drop detection module 100 is configured to receive a pressure drop signal PB, and the pressure drop signal PB is a voltage signal across the brake pipe; the control detection module 200 is configured to receive a control signal GB, and the control signal GB is a voltage signal at the control end of the brake pipe; the first protection module 300 is connected to the pressure drop detection module 100 and the control detection module 200, and the first protection module 300 is configured to issue a first reminder signal when both the pressure drop signal PB and the control signal GB are high-level signals; the second protection module 400 is connected to the pressure drop detection module 100 and the control detection module 200, and the second protection module 400 is configured to issue a second reminder signal when both the pressure drop signal PB and the control signal GB are low-level signals.

[0031] Optionally, the pressure drop detection module 100 is configured to receive a pressure drop signal PB, and the pressure drop signal PB is a voltage signal across the brake pipe. When the brake pipe is in a conducting state, the pressure drop signal PB across the brake pipe is at a low level (i.e., the pressure drop voltage is 2 - 3V), and when the brake pipe is in a closed state, the pressure drop signal PB across the brake pipe is at a high level (i.e., the pressure drop voltage is the bus voltage).

[0032] Optionally, the control detection module 200 is configured to receive a control signal GB, and the control signal GB is a voltage signal at the control end of the brake pipe. The control signal GB is used to control the on / off state of the brake pipe. For example, the brake pipe can be a MOS transistor, specifically an NMOS transistor, and the control signal GB is the gate voltage signal of the NMOS transistor. When the control signal GB is at a high level, the NMOS transistor is in a conducting state, and when the control signal GB is at a low level, the NMOS transistor is in a closed state. In other embodiments, the brake pipe can also be a PMOS transistor, a triode, or other semiconductor devices with a switching function, which will not be listed one by one here.

[0033] Optionally, the first protection module 300 is connected to the pressure drop detection module 100 and the control detection module 200, and the first protection module 300 is configured to issue a first reminder signal when both the pressure drop signal PB and the control signal GB are high-level signals. When the control signal GB is at a high level, the brake pipe is in a conducting state. At this time, the pressure drop signal PB should be at a low level. If the actually sampled pressure drop signal PB is at a high level, it means that the brake pipe has a desaturation phenomenon at this time, that is, an overcurrent anomaly occurs currently. At this time, a first reminder signal will be generated, and this signal will be fed back to the control main chip, and the main chip will block the wave in time and display a fault code.

[0034] Optionally, the second protection module 400 is configured to issue a second reminder signal when both the pressure drop signal PB and the control signal GB are low-level signals. When the control signal GB is at a low level, the brake pipe is in a closed state. At this time, the pressure drop signal PB should be at a high level. If the actually sampled pressure drop signal PB is at a low level, it indicates that the brake pipe conducts autonomously when not controlled, which is determined to be a failure of the brake pipe device. At this time, a second reminder signal will be generated, and this signal will be fed back to the control main chip, and the control main chip will block the wave in time and display the fault code.

[0035] Understandably, in the above manner, by detecting the high and low level signals of the pressure drop signal PB and the control signal GB, it is determined whether the device has a fault, so as to control the protection module to issue different reminder signals and display the different fault codes represented by the different reminder signals, so that the device fault information can be effectively reported.

[0036] See Figure 2 , Figure 2 FIG. 10 is a schematic structural diagram of a second embodiment of the brake pipe protection circuit provided by the present application. The brake pipe protection circuit 1000 includes a pressure drop detection module 100, a control detection module 200, a first protection module 300, and a second protection module 400.

[0037] Among them, the pressure drop detection module 100 is configured to receive a pressure drop signal PB, and the pressure drop signal PB is a voltage signal across the brake pipe; the control detection module 200 is configured to receive a control signal GB, and the control signal GB is a voltage signal at the control end of the brake pipe; the first protection module 300 is connected to the pressure drop detection module 100 and the control detection module 200, and the first protection module 300 is configured to issue a first reminder signal when both the pressure drop signal PB and the control signal GB are high-level signals; the second protection module 400 is connected to the pressure drop detection module 100 and the control detection module 200, and the second protection module 400 is configured to issue a second reminder signal when both the pressure drop signal PB and the control signal GB are low-level signals.

[0038] Optionally, the pressure drop detection module 100 includes: a first diode D1, a second diode D2, and a third diode D3. The cathode of the first diode D1 is configured to receive the pressure drop signal PB; the cathode of the second diode D2 is connected to the anode of the first diode D1, and the anode of the second diode D2 is connected to the first protection module 300; the cathode of the third diode D3 is connected to the anode of the first diode D1, and the anode of the third diode D3 is connected to the second protection module 400. Among them, in one embodiment, the first diode D1 may include a plurality of series-connected diodes, such as two diodes in series.

[0039] Optionally, the control detection module 200 includes: a fourth diode D4 and a first switching transistor Q1. The cathode of the fourth diode D4 is configured to receive a control signal GB, and the anode of the fourth diode D4 is connected to the first protection module 300; the control terminal of the first switching transistor Q1 is configured to receive the control signal GB, the first terminal of the first switching transistor Q1 is connected to the second protection module 400, and the second terminal of the first switching transistor Q1 is grounded. Wherein, in one embodiment, the fourth diode D4 may include a plurality of parallel-connected diodes, for example, two diodes in parallel.

[0040] Specifically, the first protection module 300 is controlled by the anode voltages of the second diode D2 and the fourth diode D4, and the second protection module 400 is controlled by the anode voltage of the third diode D3. When both the control signal GB and the voltage drop signal PB are at a high level, the anode voltages of the second diode D2 and the fourth diode D4 are both at a high level, and the first protection module 300 issues a first reminder signal; when the control signal GB is at a high level while the voltage drop signal PB is at a low level, the anode voltage of the second diode D2 is at a low level, and the first protection module 300 does not issue a first reminder signal. When both the control signal GB and the voltage drop signal PB are at a low level, the anode voltage of the third diode D3 is at a low level, and the second protection module 400 issues a second reminder signal; when the control signal GB is at a low level while the voltage drop signal PB is at a high level, the anode voltage of the third diode D3 is at a high level, and the second protection module does not issue a second reminder signal.

[0041] Refer to Figure 3 , Figure 3 FIG. is a schematic structural diagram of a third embodiment of the brake pipe protection circuit provided by the present application. The brake pipe protection circuit 1000 includes a voltage drop detection module 100, a control detection module 200, a first protection module 300, and a second protection module 400.

[0042] Wherein, the voltage drop detection module 100 is configured to receive a voltage drop signal PB, and the voltage drop signal PB is a voltage signal across the brake pipe; the control detection module 200 is configured to receive a control signal GB, and the control signal GB is a voltage signal at the control end of the brake pipe; the first protection module 300 is connected to the voltage drop detection module 100 and the control detection module 200, and the first protection module 300 is configured to issue a first reminder signal when both the voltage drop signal PB and the control signal GB are high-level signals; the second protection module 400 is connected to the voltage drop detection module 100 and the control detection module 200, and the second protection module 400 is configured to issue a second reminder signal when both the voltage drop signal PB and the control signal GB are low-level signals.

[0043] Figure 3 The shown brake pipe protection circuit 1000 and Figure 2The shown brake pipe protection circuit 1000 mainly differs in that the specific circuit structure of the first protection module 300 is added. Therefore, the following mainly describes the first protection module 300. For other components in the brake pipe protection circuit 1000, please refer to Figure 2 the relevant descriptions of the embodiments shown, for example Figure 3 the voltage drop detection module 100 in Figure 2 the description of the voltage drop detection module 100 in, which will not be elaborated here.

[0044] Optionally, the first protection module 300 includes: a first optocoupler U1, a first resistor R1, and a first control unit 310. The anode of the primary side diode of the first optocoupler U1 receives a reference voltage signal; the first end of the first resistor R1 is connected to the anode of the primary side diode of the first optocoupler U1, and the second end of the first resistor R1 is connected to the cathode of the primary side diode of the first optocoupler U1; the first control unit 310 is connected to the anode of the second diode D2 and the anode of the fourth diode D4.

[0045] Specifically, when the reference voltage at the anode of the primary side diode of the first optocoupler U1 is less than the voltage at the cathode of the primary side diode of the first optocoupler U1, the first optocoupler U1 is in the cut-off state, and the first protection module 300 does not send out the first reminder signal; when the reference voltage at the anode of the primary side diode of the first optocoupler U1 is greater than the voltage at the cathode of the primary side diode of the first optocoupler U1, the first optocoupler U1 is in the conducting state, and the first protection module 300 sends out the first reminder signal.

[0046] Optionally, the first control unit 310 includes: a voltage dividing module 311 and a second switching tube Q2. The first end of the voltage dividing module 311 is configured to input a reference voltage signal, the second end of the voltage dividing module 311 is grounded, the first voltage dividing node of the voltage dividing module 311 (for example, the common end of the eleventh resistor R11 and the twelfth resistor R12) is connected to the anode of the second diode D2, and the second voltage dividing node of the voltage dividing module 311 (for example, the common end of the thirteenth resistor R13 and the fourteenth resistor R14) is connected to the anode of the fourth diode D4; wherein, the voltage at the second voltage dividing node is less than the voltage at the first voltage dividing node; the control end of the second switching tube Q2 is connected to the second voltage dividing node, the first end of the second switching tube Q2 is connected to the cathode of the primary side diode of the first optocoupler U1, and the second end of the second switching tube Q2 is grounded.

[0047] Optionally, the second switching tube Q2 can be a zener diode. The first end, the second end, and the control end of the second switching tube Q2 respectively correspond to the cathode, the anode, and the reference end of the zener diode. When the voltage at the reference end of the zener diode is greater than the set value, its anode and cathode are conducted and an output current signal is output through the anode. When the voltage at the reference end is less than the set value, the zener diode will be cut off.

[0048] Specifically, the first control unit 310 is configured to turn on the second switching transistor Q2 when the voltages at the anodes of the second diode D2 and the fourth diode D4 are both high, pulling down the voltage at the cathode of the primary diode of the first optocoupler U1, so that the first end and the second end of the secondary side of the first optocoupler U1 are turned on, thereby emitting a first reminder signal.

[0049] Refer to Figure 4 , Figure 4 FIG. is a schematic structural diagram of a fourth embodiment of a brake pipe protection circuit provided by the present application. The brake pipe protection circuit 1000 includes a voltage drop detection module 100, a control detection module 200, a first protection module 300, and a second protection module 400.

[0050] Among them, the voltage drop detection module 100 is configured to receive a voltage drop signal PB, where the voltage drop signal PB is a voltage signal across the brake pipe; the control detection module 200 is configured to receive a control signal GB, where the control signal GB is a voltage signal at the control end of the brake pipe; the first protection module 300 is connected to the voltage drop detection module 100 and the control detection module 200, and the first protection module 300 is configured to emit a first reminder signal when both the voltage drop signal PB and the control signal GB are high-level signals; the second protection module 400 is connected to the voltage drop detection module 100 and the control detection module 200, and the second protection module 400 is configured to emit a second reminder signal when both the voltage drop signal PB and the control signal GB are low-level signals.

[0051] Figure 4 The shown brake pipe protection circuit 1000 and Figure 3 The main difference between the shown brake pipe protection circuit 1000 lies in the specific circuit structure of the added components of the voltage drop detection module 100 and the first protection module 300. Therefore, the following mainly describes the added components of the voltage drop detection module 100 and the first protection module 300. For other components in the brake pipe protection circuit 1000, please refer to Figure 3 The relevant description of the shown embodiment, for example Figure 4 The first protection module 300 in Figure 3 The description of the first protection module 300 in can be referred to, and details are not repeated here.

[0052] Optionally, the first protection module 300 further includes: a second resistor R2 and a first capacitor C1. The first end of the second resistor R2 is configured to receive a reference voltage signal, and the second end of the second resistor R2 is connected to the anode of the primary diode of the first optocoupler U1; the first end of the first capacitor C1 is connected to the first end of the second resistor R2, and the second end of the first capacitor C1 is grounded.

[0053] Optionally, the voltage drop detection module 100 further includes: a second capacitor C2, a third resistor R3, and a third switching transistor Q3. The first end of the second capacitor C2 is connected to the cathode of the fourth diode D4; the first end of the third resistor R3 is connected to the second end of the second capacitor C2, and the second end of the third resistor R3 is grounded; the control end of the third switching transistor Q3 is connected to the second end of the second capacitor C2, the first end of the third switching transistor Q3 is connected to the anode of the fourth diode D4, and the second end of the third switching transistor Q3 is grounded.

[0054] Specifically, the third switching transistor Q3 is controlled by a control signal GB. When the control signal GB is at a high level, the third switching transistor Q3 is turned on, and at this time, the anode voltage of the fourth diode D4 is pulled to a high level; when the control signal GB is at a low level, the third switching transistor Q3 is turned off, and the anode voltage of the fourth diode D4 is pulled to a low level by the control signal GB.

[0055] Refer to Figure 5 , Figure 5 FIG. is a schematic structural diagram of a fifth embodiment of the brake pipe protection circuit provided by the present application. The brake pipe protection circuit 1000 includes a voltage drop detection module 100, a control detection module 200, a first protection module 300, and a second protection module 400.

[0056] Among them, the voltage drop detection module 100 is configured to receive a voltage drop signal PB, and the voltage drop signal PB is a voltage signal across the brake pipe; the control detection module 200 is configured to receive a control signal GB, and the control signal GB is a voltage signal at the control end of the brake pipe; the first protection module 300 is connected to the voltage drop detection module 100 and the control detection module 200, and the first protection module 300 is configured to issue a first reminder signal when both the voltage drop signal PB and the control signal GB are high-level signals; the second protection module 400 is connected to the voltage drop detection module 100 and the control detection module 200, and the second protection module 400 is configured to issue a second reminder signal when both the voltage drop signal PB and the control signal GB are low-level signals.

[0057] Figure 5 The brake pipe protection circuit 1000 shown in Figure 4 The main difference between the brake pipe protection circuit 1000 shown in Figure 4 and the brake pipe protection circuit 1000 shown in Figure 5 is that the specific circuit structures of the components added to the control detection module 200 and the second protection module 400 are added. Therefore, the components added to the control detection module 200 and the second protection module 400 will be mainly described below. For other components in the brake pipe protection circuit 1000, please refer to Figure 4 the relevant descriptions of the embodiments shown in

[0058] Optionally, the second protection module 400 includes: a second optocoupler U2 and a fourth resistor R4. The anode of the primary diode of the second optocoupler U2 receives a reference voltage signal; the first end of the fourth resistor R4 is connected to the anode of the primary diode of the second optocoupler U2 and the first end of the first switching transistor Q1, and the second end of the fourth resistor R4 is connected to the cathode of the primary diode of the second optocoupler U2 and the anode of the third diode D3.

[0059] Specifically, when the reference voltage at the anode of the primary diode of the second optocoupler U2 is less than the voltage at the cathode of the primary diode of the second optocoupler U2, the second optocoupler U2 is in the cut-off state, and the second protection module 400 does not send out a second reminder signal; when the reference voltage at the anode of the primary diode of the second optocoupler U2 is greater than the voltage at the cathode of the primary diode of the second optocoupler U2, the second optocoupler U2 is in the conducting state, and the second protection module 400 sends out a second reminder signal.

[0060] Optionally, the second protection module 400 further includes: a fifth resistor R5 and a third capacitor C3. The first end of the fifth resistor R5 is configured to receive a reference voltage signal, and the second end of the fifth resistor R5 is connected to the anode of the primary diode of the second optocoupler U2; the first end of the third capacitor C3 is connected to the first end of the fifth resistor R5, and the second end of the third capacitor C3 is grounded.

[0061] Optionally, the control detection module 200 further includes: a sixth resistor R6, a fourth capacitor C4, a fifth capacitor C5, and a seventh resistor R7. The first end of the sixth resistor R6 is configured to receive a control signal GB, and the second end of the sixth resistor R6 is connected to the control end of the first switching transistor Q1; the first end of the fourth capacitor C4 is connected to the first end of the sixth resistor R6, and the second end of the fourth capacitor C4 is connected to the second end of the sixth resistor R6; the first end of the seventh resistor R7 is connected to the control end of the first switching transistor Q1, and the second end of the seventh resistor R7 is grounded; the first end of the fifth capacitor C5 is connected to the control end of the first switching transistor Q1, and the second end of the fifth capacitor C5 is grounded.

[0062] Specifically, when the control signal GB is at a high level, the first switching transistor Q1 and the third switching transistor Q3 are turned on, the anode voltage of the fourth diode D4 is pulled up. If the sampled voltage drop signal PB is at a high level, the anode voltage of the second diode D2 is at a high level, the second switching transistor Q2 is turned on, the cathode voltage of the primary diode of the first optocoupler U1 is pulled to ground, the first optocoupler U1 is turned on, and the first protection module 300 sends out a first reminder signal; when the control signal GB is at a low level, if the sampled voltage drop signal PB is at a low level, the anode voltage of the third diode D3 is at a low level, that is, the cathode voltage of the primary diode of the second optocoupler is less than the anode voltage of the primary diode (i.e., the voltage output by the fifth resistor R5), the second optocoupler U2 is turned on, and the second protection module 400 sends out a second reminder signal.

[0063] SeeFigure 6 , Figure 6 is a schematic structural diagram of the sixth embodiment of the brake pipe protection circuit provided by this application. The brake pipe protection circuit 1000 includes a voltage drop detection module 100, a control detection module 200, a first protection module 300, and a second protection module 400.

[0064] Among them, the voltage drop detection module 100 is configured to receive a voltage drop signal PB, and the voltage drop signal PB is a voltage signal across the brake pipe; the control detection module 200 is configured to receive a control signal GB, and the control signal GB is a voltage signal at the control end of the brake pipe; the first protection module 300 is connected to the voltage drop detection module 100 and the control detection module 200, and the first protection module 300 is configured to issue a first reminder signal when both the voltage drop signal PB and the control signal GB are high-level signals; the second protection module 400 is connected to the voltage drop detection module 100 and the control detection module 200, and the second protection module 400 is configured to issue a second reminder signal when both the voltage drop signal PB and the control signal GB are low-level signals.

[0065] Figure 6 The shown brake pipe protection circuit 1000 and Figure 5 The main difference between the shown brake pipe protection circuit 1000 lies in the specific circuit structure of the added components of the brake pipe protection circuit 1000. Therefore, the following mainly describes the added components of the brake pipe protection circuit 1000. For other components in the brake pipe protection circuit 1000, please refer to Figure 5 the relevant descriptions of the shown embodiments, such as Figure 6 the first protection module 300 in Figure 5 can refer to the description of the first protection module 300 in

[0066] Optionally, the brake pipe protection circuit 1000 further includes a zener diode Z1, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, and an eleventh capacitor C11.

[0067] Specifically, the anode of the voltage stabilizing diode Z1 is connected to the second end of the third switching transistor Q3, and the cathode of the voltage stabilizing diode Z1 is connected to the anode of the first diode D1; the first end of the fifteenth resistor R15 is configured to receive the voltage drop signal PB, and the second end of the fifteenth resistor R15 is connected to the cathode of the first diode D1; the first end of the sixteenth resistor R16 is configured to receive the control signal GB, and the second end of the sixteenth resistor R16 is connected to the first end of the second capacitor C2; the first end of the seventeenth resistor R17 is connected to the first end of the eleventh resistor R11, and the second end of the seventeenth resistor R17 is connected to the anode of the second diode D2 and the second end of the eleventh resistor R11; the first end of the eighteenth resistor R18 is configured to receive the +5V voltage signal; the first end of the sixth capacitor C6 is connected to the second end of the eighteenth resistor R18, and the second end of the sixth capacitor C6 is connected to the ground; the first end of the nineteenth resistor R19 is connected to the first end of the secondary side of the first optocoupler U1 and the second end of the eighteenth resistor R18, and the second end of the nineteenth resistor R19 is configured to output the first reminder signal; the first end of the seventh capacitor C7 is connected to the second end of the nineteenth resistor R19, and the second end of the seventh capacitor C7 is grounded; the first end of the twentieth resistor R20 is connected to the first end of the secondary side of the second optocoupler U2 and the first end of the eighth capacitor C8, and the second end of the twentieth resistor R20 is configured to output the second reminder signal; the first end of the eighth capacitor C8 is configured to receive the +5V voltage signal, and the second end of the eighth capacitor C8 is grounded; the first end of the ninth capacitor C9 is connected to the second end of the twentieth resistor R20, and the second end of the ninth capacitor C9 is grounded; the first end of the tenth capacitor C10 is connected to the second end of the fourteenth resistor R14, and the second end of the tenth capacitor C10 is grounded; the first end of the eleventh capacitor C11 is connected to the first end of the fourth resistor R4, and the second end of the eleventh capacitor C11 is grounded.

[0068] When the braking tube protection circuit of this embodiment is applied to an electronic device, the first protection module and the second protection module are used as the key centers. When a fault occurs in the electronic device, the voltage drop detection module and the control detection module are used to detect the high and low level signals of the voltage drop signal and the control signal, so as to judge whether a fault occurs in the device, and then control different protection modules to emit different reminder signals, so that the device fault information can be effectively reported.

[0069] Refer to Figure 7 , Figure 7 is a schematic structural diagram of an embodiment of an electronic device provided by this application. The electronic device includes a braking tube protection circuit 1000, and the braking tube protection circuit 1000 is as described in the above embodiment and will not be elaborated here.

[0070] The above are only the embodiments of the present application, and do not thus limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present application.

Claims

1. A brake pipe protection circuit, characterized in that: The brake pipe protection circuit comprises: A voltage drop detection module, wherein the voltage drop detection module is configured to receive a voltage drop signal, wherein the voltage drop signal is a voltage signal at both ends of the brake pipe; A control detection module, wherein the control detection module is configured to receive a control signal, wherein the control signal is a voltage signal of a control end of the brake pipe; A first protection module, connected to the voltage drop detection module and the control detection module, wherein the first protection module is configured to send a first reminder signal when both the voltage drop signal and the control signal are high level signals; The second protection module is connected to the voltage drop detection module and the control detection module, and the second protection module is configured to send a second reminder signal when the voltage drop signal and the control signal are both low-level signals.

2. The brake pipe protection circuit according to claim 1, characterized in that: The voltage drop detection module comprises: a first diode, a cathode of the first diode being configured to receive the voltage drop signal; a second diode, wherein a cathode of the second diode is connected to an anode of the first diode, and an anode of the second diode is connected to the first protection module; a third diode, wherein a cathode of the third diode is connected to an anode of the first diode, and an anode of the third diode is connected to the second protection module; The control detection module comprises: a fourth diode, wherein a cathode of the fourth diode is configured to receive the control signal, and an anode of the fourth diode is connected to the first protection module; A first switch tube, wherein a control end of the first switch tube is configured to receive the control signal, a first end of the first switch tube is connected to the second protection module, and a second end of the first switch tube is grounded.

3. The brake pipe protection circuit according to claim 2, characterized in that: The first protection module includes: A first optical coupler, wherein a primary diode anode of the first optical coupler receives a reference voltage signal; a first resistor, wherein a first end of the first resistor is connected to an anode of a primary diode of the first optocoupler, and a second end of the first resistor is connected to a cathode of a primary diode of the first optocoupler; A first control unit is connected to the anode of the second diode and the anode of the fourth diode. The first control unit is configured to pull down the voltage of the cathode of the primary diode of the first optocoupler when the voltage of the anode of the second diode and the voltage of the anode of the fourth diode are both at a high level, so as to turn on the first end of the secondary side and the second end of the secondary side of the first optocoupler, thereby issuing the first reminder signal.

4. The brake pipe protection circuit according to claim 3, characterized in that: The first control unit comprises: A voltage dividing module, wherein a first end of the voltage dividing module is configured to input a reference voltage signal, a second end of the voltage dividing module is grounded, a first voltage dividing node of the voltage dividing module is connected to the anode of the second diode, and a second voltage dividing node of the voltage dividing module is connected to the anode of the fourth diode; wherein a voltage of the second voltage dividing node is less than a voltage of the first voltage dividing node; A second switch tube, wherein the control end of the second switch tube is connected to the second voltage-dividing node, the first end of the second switch tube is connected to the cathode of the primary diode of the first optocoupler, and the second end of the second switch tube is grounded.

5. The brake pipe protection circuit according to claim 3, characterized in that: The first protection module also includes: a second resistor, wherein a first end of the second resistor is configured to receive a reference voltage signal, and a second end of the second resistor is connected to an anode of a primary diode of the first optical coupler; A first capacitor, wherein a first end of the first capacitor is connected to a first end of the second resistor, and a second end of the first capacitor is grounded.

6. The brake pipe protection circuit according to claim 2, characterized in that: The voltage drop detection module also includes: a second capacitor, wherein a first end of the second capacitor is connected to a cathode of the fourth diode; a third resistor, wherein a first end of the third resistor is connected to the second end of the second capacitor, and a second end of the third resistor is grounded; A third switch tube, wherein the control end of the third switch tube is connected to the second end of the second capacitor, the first end of the third switch tube is connected to the anode of the fourth diode, and the second end of the third switch tube is grounded.

7. The brake pipe protection circuit according to claim 2, characterized in that: The second protection module comprises: A second optical coupler, wherein a primary diode anode of the second optical coupler receives a reference voltage signal; A fourth resistor, wherein a first end of the fourth resistor is connected to the anode of the primary diode of the second optocoupler and the first end of the first switch tube, and a second end of the fourth resistor is connected to the cathode of the primary diode of the second optocoupler and the anode of the third diode.

8. The brake pipe protection circuit according to claim 7, characterized in that: The second protection module also includes: a fifth resistor, wherein a first end of the fifth resistor is configured to receive a reference voltage signal, and a second end of the fifth resistor is connected to an anode of a primary diode of the second optical coupler; A third capacitor, wherein a first end of the third capacitor is connected to the first end of the fifth resistor, and a second end of the third capacitor is grounded.

9. The brake pipe protection circuit according to claim 2, characterized in that: The control detection module also includes: a sixth resistor, wherein a first end of the sixth resistor is configured to receive the control signal, and a second end of the sixth resistor is connected to the control end of the first switch tube; a fourth capacitor, wherein a first end of the fourth capacitor is connected to a first end of the sixth resistor, and a second end of the fourth capacitor is connected to a second end of the sixth resistor; a seventh resistor, wherein a first end of the seventh resistor is connected to the control end of the first switch tube, and a second end of the seventh resistor is grounded; A fifth capacitor, wherein a first end of the fifth capacitor is connected to the control end of the first switch tube, and a second end of the fifth capacitor is grounded.

10. An electronic device, characterized in that: The electronic device comprises: Brake pipe; A protection circuit is connected to the brake pipe, and the protection circuit is the brake pipe protection circuit as described in any one of claims 1-9.

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