Early warning circuit of heading machine

Abstract

The utility model relates to a heading machine early warning circuit, the circuit comprises an early warning control unit, at least two detection elements and an early warning unit, and the early warning unit comprises at least two early warning sub-circuits; the detection element, the early warning control unit and the early warning unit are connected in sequence, and the at least two early warning sub-circuits are connected in parallel; the detection element is configured to collect detection data of a to-be-detected object and send the detection data to the early warning control unit; the early warning control unit is configured to generate an early warning signal based on the detection data and send the early warning signal to the early warning unit, and the early warning signal is used for controlling a target early warning sub-circuit in the early warning unit to be closed and sending out early warning. In this way, on-site workers can determine the working state of the heading machine after receiving the early warning, then take corresponding measures in time according to the working state, and can quickly solve the problem when abnormity occurs, and the situations of personnel injury and property loss caused by the fact that the transportation state of the heading machine cannot be mastered in time are avoided.

Description

Technical Field

[0001] The present disclosure relates to the technical field of circuit control of roadheaders, and in particular to an early warning circuit of roadheaders. Background Art

[0002] During the transportation of the TBM, due to the limited vision inside the tunnel, the staff cannot clearly understand the transportation status of the TBM. If the transportation status of the TBM cannot be grasped in time, it is likely to cause personal injury and property loss. Therefore, the forecast work before and during the construction of the TBM is related to the progress, quality and safety of the project, and is of great significance. Utility Model Content

[0003] In order to solve the problems existing in the prior art, the present disclosure provides an early warning circuit for a roadheader.

[0004] The present disclosure provides a roadheader early warning circuit, the roadheader early warning circuit comprising an early warning control unit, at least two detection elements, and an early warning unit, the early warning unit comprising at least two early warning subcircuits, the at least two early warning subcircuits corresponding to the detection types of the at least two detection elements;

[0005] The detection element, the early warning control unit and the early warning unit are connected in sequence, and the at least two early warning sub-circuits are connected in parallel;

[0006] The detection element is configured to collect detection data of the object to be detected and send the detection data to the early warning control unit;

[0007] The early warning control unit is configured to generate an early warning signal based on the detection data and send the early warning signal to the early warning unit. The early warning signal is used to control the target early warning subcircuit in the early warning unit to close and issue an early warning.

[0008] In one embodiment of the present disclosure, the early warning subcircuit includes a control switch and an early warning element, and the early warning signal is used to control the corresponding control switch to be turned on. When the control switch is turned on, the corresponding early warning element issues an early warning.

[0009] In one embodiment of the present disclosure, the control switch is an intermediate relay, and the warning element is a light warning element or a voice warning element.

[0010] In one embodiment of the present disclosure, the at least two warning subcircuits include a working warning subcircuit and an abnormal warning subcircuit, the working warning subcircuit performs a working prompt, and the abnormal warning subcircuit performs an abnormal alarm;

[0011] The early warning control unit is also configured to output a work prompt signal and close the work-type early warning subcircuit when the detection data includes work prompt data; and to output an alarm signal and close the abnormality-type early warning subcircuit when the detection data includes risk detection data and the risk detection data indicates an abnormality.

[0012] In one embodiment of the present disclosure, there are at least two working warning subcircuits, and when the at least two working warning subcircuits are closed by the same working prompt signal, the at least two working warning subcircuits include warning elements of different types.

[0013] In one embodiment of the present disclosure, there are at least two abnormality warning subcircuits, and different abnormality warning subcircuits are used to warn of different abnormality types;

[0014] The early warning control unit is further configured to determine the abnormality type and generate a target alarm signal corresponding to the abnormality type, wherein the target alarm signal is used to close a first early warning subcircuit, wherein the first early warning subcircuit is a subcircuit that warns of the abnormality type among the at least two working type early warning subcircuits.

[0015] In one embodiment of the present disclosure, the abnormality warning subcircuit further includes a timing subcircuit;

[0016] When the first early warning subcircuit is closed, the timing subcircuit is closed, the timing subcircuit times the closing time of the first early warning subcircuit, and when the closing time reaches a preset time, the target alarm signal is sent to the protection device of the tunnel boring machine, and the protection device is used to disconnect the power supply of the tunnel boring machine.

[0017] In one embodiment of the present disclosure, the tunnel boring machine early warning circuit further includes:

[0018] The battery module is connected in parallel with the warning control unit and is configured to supply power to the tunnel boring machine warning circuit.

[0019] In one embodiment of the present disclosure, the battery module is an intrinsically safe 12V power supply.

[0020] In one embodiment of the present disclosure, the tunnel boring machine warning circuit is a DC circuit.

[0021] One beneficial effect of the present disclosure is that the early warning circuit of the tunnel boring machine is provided with at least two early warning subcircuits, and different early warning subcircuits have different early warning types. The early warning control unit can determine the early warning signal based on the detection data fed back by the detection element, and then determine the early warning type of the detection element, and then close the early warning subcircuit corresponding to the early warning type to issue an early warning. In this way, the on-site staff can determine the working status of the tunnel boring machine after receiving the early warning, and then take corresponding measures in time according to the working status, and can quickly solve the abnormality when it occurs, avoiding the occurrence of injuries to personnel and property losses caused by the failure to grasp the transportation status of the tunnel boring machine in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0023] Figure 1 It is a structural block diagram of a roadheader warning circuit provided by an embodiment of the present disclosure;

[0024] Figure 2 is a schematic diagram of a roadheader warning circuit provided by another embodiment of the present disclosure;

[0025] Figure 1 to Figure 2 The one-to-one correspondence between the component names and the reference numerals is as follows:

[0026] 102, early warning control unit; 104, early warning unit; 1041, early warning subcircuit; 106, detection element. DETAILED DESCRIPTION

[0027] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure unless otherwise specifically stated.

[0028] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0029] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0030] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0031] The specific embodiments of the present disclosure are described below in conjunction with the accompanying drawings.

[0032] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0033] In this article, "first", "second", etc. are only used to distinguish each other, and do not indicate the importance and order, or the premise of each other's existence.

[0034] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0035] The embodiment of the present disclosure provides a structural block diagram of a roadheader early warning circuit, such as Figure 1 As shown, the early warning circuit of the roadheader includes an early warning control unit 102, at least two detection elements 106, and an early warning unit 104, the early warning unit 104 includes at least two early warning sub-circuits 1041, and the at least two early warning sub-circuits 1041 correspond to the detection types of the at least two detection elements 106;

[0036] The detection element 106, the early warning control unit 102 and the early warning unit 104 are connected in sequence, and at least two early warning sub-circuits 1041 are connected in parallel;

[0037] The detection element 106 is configured to collect detection data of the object to be detected and send the detection data to the early warning control unit 102;

[0038] The warning control unit 102 is configured to generate a warning signal based on the detection data and send the warning signal to the warning unit 104. The warning signal is used to control the target warning subcircuit 1041 in the warning unit 104 to close and issue a warning.

[0039] Specifically, the early warning circuit of the tunnel boring machine refers to a circuit structure that can warn the working state of the tunnel boring machine. The early warning control unit 102 refers to a unit that can control the switching of the early warning subcircuit 1041 in the early warning unit 104 based on the detection data fed back by the detection element 106, such as the early warning control unit 102 can be an MCU (Microcontroller Unit); the early warning subcircuit 1041 is provided with an early warning switch and an early warning element, and the early warning subcircuit 1041 is powered on after the early warning switch is closed, and the early warning element issues an early warning; the detection element 106 can refer to a certain element that detects the working state of the tunnel boring machine, such as the detection element 106 is a tunnel boring machine main circuit controller, and the tunnel boring machine main circuit controller collects the detection data of the tunnel boring machine starting to work after the tunnel boring machine is powered on; or, the detection element 106 is a deviation sensor arranged on both sides of the tunnel boring machine conveyor belt, which is configured to detect whether the tunnel boring machine conveyor belt is deviated; the target early warning subcircuit 1041 is the early warning subcircuit 1041 corresponding to the detection type of the early warning signal, and the early warning signal includes the detection type of the detection element 106.

[0040] In addition, the detection type refers to the classification of the detection data of the detection element 106, such as the detection type includes the working type and the abnormal type, the working type specifically refers to the start of a certain device working, and the abnormal type specifically refers to the abnormality of a certain device. As an example, the detection element 106 is a main circuit controller of a tunnel boring machine, and the detection data collected is the detection data of the working type, that is, the signal that the tunnel boring machine starts working. The detection element 106 is a deviation sensor, and the data collected is the data of the conveyor belt, that is, the data of the working status of the conveyor belt.

[0041] Specifically, when the detection type is a working type, the detection element 106 only collects detection data once, that is, the data when a certain device is just powered on. Once the device is powered on, it means that the device has started to work. Therefore, it is only necessary to generate an early warning signal based on the detection data and send it to the early warning unit 104, close the corresponding early warning sub-circuit 1041, and issue an early warning that the certain device has started to work, so as to remind the staff near the device to stay away from the device; when the detection type is an abnormal type, the detection element 106 needs to continuously collect detection data. Specifically, the detection data can be collected once at regular intervals, and it is determined whether the data detected by the detection element 106 is abnormal based on the detection data. If it is abnormal, a warning signal is generated and transmitted to the early warning unit 104, and the corresponding early warning sub-circuit 1041 is closed to issue an early warning. If there is no abnormality in the warning data, no processing is performed.

[0042] It should be noted that since a single early warning subcircuit 1041 can only warn the corresponding detection type, for example, the early warning subcircuit 1041 for the working type can only warn "XX device starts working", and the early warning subcircuit 1041 for the abnormal type can only warn "XX device has an abnormality".

[0043] Therefore, in the embodiment of the present disclosure, after receiving the detection data of the detection element 106, the early warning control unit 102 automatically identifies the detection type of the detection element 106, selects the early warning subcircuit 1041 corresponding to the detection type from the at least two early warning subcircuits 1041 included in the early warning unit 104 as the target early warning subcircuit 1041, and the detection type of the detection element 106 is matched with the target early warning subcircuit 1041, so that the early warning subcircuit 1041 can accurately warn of the detection type.

[0044] Furthermore, in order to enable the early warning subcircuit 1041 to accurately receive the corresponding early warning signal, such as Figure 2 As shown, in one embodiment of the present disclosure, the warning subcircuit 1041 includes a control switch and a warning element, and the warning signal is used to control the corresponding control switch to be turned on. When the control switch is turned on, the corresponding warning element issues a warning.

[0045] Specifically, the early warning control unit 102 can pre-store the correspondence between the detection type and the control switch in the early warning sub-circuit 1041. The early warning control unit 102 determines the detection type of the detection element 106 and generates an early warning signal based on the detection data sent by the detection element 106. Then, based on the correspondence, the corresponding control switch can be determined. Then, the early warning control unit 102 sends the early warning signal generated based on the detection data to the corresponding control switch. After receiving the signal, the control switch is closed, and the early warning sub-circuit 1041 is closed. At this time, the early warning element connected to it is also energized. After the early warning element is energized, an early warning can be issued.

[0046] It should be noted that the working site of the roadheader is complex, generally various tunnels, such as: earth tunnels, rock tunnels or mixed earth and rock tunnels. The site is filled with the sound of machines operating, loud noise or dim environment.

[0047] Therefore, sound and light warnings can be adopted. For example, light warnings can be used in an environment with dim vision and huge noise, and sound warnings can be used in an environment with bright vision but relatively quiet. In order to make the circuit power consumption small and the temperature rise low, no external high-power resistor is required. Therefore, an intermediate relay with low power consumption and convenient wiring can be used as a control switch.

[0048] like Figure 2 As shown, in one embodiment of the present disclosure, the control switch is an intermediate relay, and the warning element is a light warning element or a voice warning element.

[0049] Specifically, intermediate relays are usually used to transmit signals and control multiple circuits simultaneously. They can also be used to directly control small-capacity motors or other electrical actuators. Intermediate relays have more contacts and smaller contact capacity. Therefore, at least two early warning subcircuits 1041 can use an intermediate relay as a control switch; the light warning element can refer to a light bulb, and the colors emitted by the light bulbs of different early warning subcircuits 1041 can be different. For example, when the tunnel boring machine is turned on, the corresponding light warning element emits yellow light, and when the conveyor belt deviates, its corresponding light warning element emits red light; the voice warning element can be any voice module, and the corresponding voice information can be pre-stored in the memory of the voice module. Different early warning subcircuits 1041 have different voice information. For example, if the voice module of the early warning subcircuit 1041 stores the voice information of "the tunnel boring machine has been turned on, please stay away from the tunnel boring machine", then when the tunnel boring machine is turned on, when the early warning subcircuit 1041 is closed, a warning of "the tunnel boring machine has been turned on, please stay away from the tunnel boring machine" will be issued. If the voice information of "the conveyor belt deviates" is stored in another early warning subcircuit 1041, then when the conveyor belt deviates, when the early warning subcircuit 1041 is closed, a warning of "the conveyor belt deviates" will be issued. It should be noted that different voice information also corresponds to detection types one by one. As an example, the intermediate relay is a DC 12 volt intermediate relay, and the voice module is a DC 12 volt voice module.

[0050] In actual applications, a tunnel boring machine generally only needs to perform two types of warnings during operation. One type is a work prompt warning, that is, a warning that a certain device has started working, and the other type is a warning that an abnormality has occurred in the equipment. Therefore, the warning control unit 102 must first determine the type of detection data before generating and sending a warning signal, generate a corresponding warning signal based on different detection data, and close the corresponding warning subcircuit 1041.

[0051] like Figure 2 As shown, in one embodiment of the present disclosure, the at least two warning subcircuits 1041 include a working warning subcircuit 1041 and an abnormal warning subcircuit 1041, the working warning subcircuit 1041 performs a working prompt, and the abnormal warning subcircuit 1041 performs an abnormal alarm;

[0052] The warning control unit 102 is also configured to output a work prompt signal and close the work-type warning subcircuit 1041 when the detection data includes work prompt data; and to output an alarm signal and close the abnormality-type warning subcircuit 1041 when the detection data includes risk detection data and the risk detection data indicates an abnormality.

[0053] Specifically, work prompts can be given when the tunnel boring machine is turned on or when any component of the tunnel boring machine starts working, such as: work prompts after the propulsion component, rotating component or lifting component is turned on; abnormal alarms can be given for any abnormalities on the tunnel boring machine site, such as conveyor belt deviation, drive roller temperature too high, carbon monoxide content too high, etc.

[0054] In actual application, when the work prompt is given, an early warning is only given when the above equipment starts working. At this time, the detection element 106 can be the controller of the tunnel boring machine. When each component or the tunnel boring machine is turned on, the controller of the tunnel boring machine will collect the detection data and send the data to the early warning control unit 102. The abnormal alarm requires the corresponding detection element 106 to collect data uninterruptedly. At this time, the detection element 106 can be a variety of sensors, such as: deviation sensor, coal pile sensor, smoke sensor, methane sensor, temperature sensor, carbon monoxide sensor, etc. The data detected by the above sensors at the work site is risk detection data. When the above sensors collect risk detection data, they are sent to the early warning control unit 102. If the early warning control unit 102 detects that the above collected data is not within the preset range, it is determined that the detection data indicates an abnormality, so an alarm signal is output, and the abnormal warning subcircuit 1041 is closed to perform abnormal warning.

[0055] Specifically, the work prompt signal can control different work-type warning sub-circuits to close, and different work-type warning sub-circuits have different warning modes.

[0056] like Figure 2 As shown, in one embodiment of the present disclosure, there are at least two working type warning sub-circuits, and when the at least two working type warning sub-circuits are closed by the same working prompt signal, the types of warning elements included in the at least two working type warning sub-circuits are different.

[0057] Specifically, only when two sub-circuits are simultaneously powered on, the two circuits have different warning modes. That is, one control signal can control multiple circuits to close at the same time. There can also be multiple working signals, and different working signals trigger corresponding sub-circuit alarms. If this is the case, the warning elements of different circuits can be the same or different.

[0058] It should be noted that different detection elements 106 collect different risk detection data, indicating different states of the objects to be detected. Therefore, in order for on-site staff to be able to promptly locate the corresponding abnormal position and the corresponding abnormal object after receiving the early warning, different abnormal warning sub-circuits can be set according to the type of detection element 106.

[0059] like Figure 2As shown, in one embodiment of the present disclosure, there are at least two abnormality warning subcircuits, and different abnormality warning subcircuits are used to warn of different abnormality types;

[0060] The early warning control unit 102 is further configured to determine the abnormality type and generate a target alarm signal corresponding to the abnormality type, wherein the target alarm signal is used to close a first early warning subcircuit, wherein the first early warning subcircuit is a subcircuit that warns of the abnormality type among the at least two working type early warning subcircuits.

[0061] Specifically, the abnormality type corresponds to the detection type of the detection element 106, and the abnormality type may include conveyor belt deviation abnormality, over-temperature abnormality, carbon monoxide concentration abnormality, etc. Other abnormality types may be determined based on the setting of the sensor.

[0062] In actual applications, when it is determined that there is an abnormality in the risk detection data, it means that there is an abnormality in the object to be detected corresponding to the detection element 106. If the object to be detected is abnormal and does not return to normal in time, the tunnel boring machine should be stopped immediately to avoid the increase of the risk factor of the abnormal situation due to continued work, which will endanger the safety of on-site personnel and the normal operation of the equipment.

[0063] like Figure 2 As shown, in one embodiment of the present disclosure, the abnormality warning subcircuit further includes a timing subcircuit;

[0064] When the first early warning subcircuit is closed, the timing subcircuit is closed, the timing subcircuit times the closing time of the first early warning subcircuit, and when the closing time reaches a preset time, the target alarm signal is sent to the protection device of the tunnel boring machine, and the protection device is used to disconnect the power supply of the tunnel boring machine.

[0065] In actual application, after the first warning subcircuit is closed, if the warning control unit 102 receives the risk detection data collected by the corresponding detection element 106 and there is no abnormality, it sends a cutoff signal to the first warning subcircuit, and the cutoff signal is used to cut off the first warning subcircuit, so that there is no need to issue a warning. Therefore, after the first warning subcircuit is closed, the control switch in the first warning circuit sends a signal to the control switch of the timing subcircuit. After receiving the signal, the timing subcircuit counts the closing time. If the closing time exceeds the preset time, it means that the warning has not been lifted during this period of time, and there is still an abnormality on site. Then, the target alarm signal is sent to the protection device of the tunnel boring machine, and the protection device is used to disconnect the power supply of the tunnel boring machine to stop the tunnel boring machine. As an example, the timing subcircuit includes a time relay and an intermediate relay.

[0066] Considering that the warning subcircuit in the tunnel boring machine warning circuit requires power to work, such as the light warning component or the voice warning component, a battery module needs to be set in the circuit to power the tunnel boring machine warning circuit.

[0067] like Figure 2 As shown, in one embodiment of the present disclosure, the tunnel boring machine warning circuit further includes:

[0068] The battery module is connected in parallel with the warning control unit 102 and is configured to supply power to the tunnel boring machine warning circuit.

[0069] Specifically, the battery module can be powered by any battery module, such as AC127 or DC12 intrinsically safe power module.

[0070] In actual applications, when a tunnel boring machine is operating in a tunnel or confined space, it is necessary to ensure the safety of the power supply used and to be able to provide stable power to the tunnel boring machine in dangerous scenarios.

[0071] In one embodiment of the present disclosure, the battery module is an intrinsically safe power supply.

[0072] Specifically, intrinsically safe power supply is intrinsically safe power supply: a circuit whose electric sparks and thermal effects generated under normal operation or specified fault conditions cannot ignite the specified explosive mixture is called an intrinsically safe circuit. Intrinsically safe power supply provides stable power supply for equipment in dangerous places such as mines containing flammable and explosive substances.

[0073] In one embodiment of the present disclosure, the tunnel boring machine warning circuit is a DC circuit.

[0074] Specifically, because direct current is stable and reliable, has low transmission loss, and has better adaptability in special environments such as high temperature, high humidity, and harmful gases, it can ensure the normal operation of the tunnel boring machine warning circuit in special environments. It avoids frequency and voltage fluctuations during transmission, which may cause damage or interference to the tunnel boring machine, and because of the low transmission loss, it can reduce energy waste and improve energy efficiency.

[0075] In addition, direct current can also be used as a backup power supply through batteries and other equipment. Once the main power supply fails, the tunnel boring machine circuit can still operate normally and ensure people's life safety.

[0076] One beneficial effect of the present disclosure is that the early warning circuit of the tunnel boring machine is provided with at least two subcircuits, and different early warning subcircuits 1041 have different early warning types. The early warning control unit 102 can determine the early warning signal based on the detection data fed back by the detection element 106, and then determine the early warning type of the detection element 106, and then close the early warning subcircuit 1041 corresponding to the early warning type to issue an early warning. In this way, the on-site staff can determine the working status of the tunnel boring machine after receiving the early warning, and then take corresponding measures in time according to the working status, and can quickly solve the abnormality when it occurs, so as to avoid the occurrence of injuries to personnel and property losses caused by the failure to grasp the transportation status of the tunnel boring machine in time.

[0077] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the marketplace, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present disclosure is defined by the appended claims.

Claims

1. A roadheader warning circuit, It is characterized in that The roadheader warning circuit includes a warning control unit, at least two detection elements, and a warning unit, wherein the warning unit includes at least two warning subcircuits, and the at least two warning subcircuits correspond to the detection types of the at least two detection elements; The detection element, the early warning control unit and the early warning unit are connected in sequence, and the at least two early warning sub-circuits are connected in parallel; The detection element is configured to collect detection data of the object to be detected and send the detection data to the early warning control unit; The early warning control unit is configured to generate an early warning signal based on the detection data and send the early warning signal to the early warning unit. The early warning signal is used to control the target early warning subcircuit in the early warning unit to close and issue an early warning.

2. The tunnel boring machine warning circuit according to claim 1, It is characterized in that The early warning subcircuit includes a control switch and an early warning element. The early warning signal is used to control the corresponding control switch to be turned on. When the control switch is turned on, the corresponding early warning element issues an early warning.

3. The tunnel boring machine warning circuit according to claim 2, It is characterized in that The control switch is an intermediate relay, and the warning element is a light warning element or a voice warning element.

4. The tunnel boring machine warning circuit according to any one of claims 1 to 3, It is characterized in that The at least two early warning subcircuits include a working early warning subcircuit and an abnormal early warning subcircuit, the working early warning subcircuit performs a working prompt, and the abnormal early warning subcircuit performs an abnormal alarm; The early warning control unit is also configured to output a work prompt signal and close the work-type early warning subcircuit when the detection data includes work prompt data; and to output an alarm signal and close the abnormality-type early warning subcircuit when the detection data includes risk detection data and the risk detection data indicates an abnormality.

5. The tunnel boring machine warning circuit according to claim 4, It is characterized in that There are at least two working warning subcircuits. When the at least two working warning subcircuits are closed by the same working prompt signal, the at least two working warning subcircuits include warning elements of different types.

6. The tunnel boring machine warning circuit according to claim 4, It is characterized in that There are at least two abnormality warning subcircuits, and different abnormality warning subcircuits are used to warn of different abnormality types; The early warning control unit is further configured to determine the abnormality type and generate a target alarm signal corresponding to the abnormality type, wherein the target alarm signal is used to close a first early warning subcircuit, wherein the first early warning subcircuit is a subcircuit that warns of the abnormality type among the at least two working type early warning subcircuits.

7. The tunnel boring machine warning circuit according to claim 6, It is characterized in that The abnormality warning subcircuit also includes a timing subcircuit; When the first early warning subcircuit is closed, the timing subcircuit is closed, the timing subcircuit times the closing time of the first early warning subcircuit, and when the closing time reaches a preset time, the target alarm signal is sent to the protection device of the tunnel boring machine, and the protection device is used to disconnect the power supply of the tunnel boring machine.

8. The tunnel boring machine warning circuit according to claim 1, It is characterized in that The tunnel boring machine early warning circuit also includes: The battery module is connected in parallel with the warning control unit and is configured to supply power to the tunnel boring machine warning circuit.

9. The tunnel boring machine warning circuit according to claim 8, It is characterized in that The battery module is an intrinsically safe 12V power supply.

10. The tunnel boring machine warning circuit according to claim 1, It is characterized in that The tunnel boring machine early warning circuit is a DC circuit.

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