Oxygen concentration monitoring device for deep foundation pit operation and automatic setting method

Abstract

The invention provides a deep foundation pit operation oxygen concentration monitoring device and an automatic setting method, and relates to the technical field of power transmission line construction equipment.The device comprises an altitude detection module used for measuring the current altitude of deep foundation pit equipment in real time and transmitting measured data to a processor; the nonvolatile memory stores a database of the corresponding relation between the altitude and the oxygen content; the communication module is used for realizing data interaction between the monitoring device and the deep foundation pit equipment; the processor can receive the altitude data of the altitude detection module, read the corresponding oxygen concentration value from the nonvolatile memory according to the data, and send the related data to the deep foundation pit equipment through the communication module, so as to realize the setting and transmission of the oxygen concentration monitoring related parameters of the deep foundation pit operation. According to the invention, altitude environment factors are considered, a connection power supply mode is optimized, data interaction compatibility is enhanced, transmission parameters can be accurately set, and monitoring work is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission line construction equipment, and particularly to an oxygen concentration monitoring device and an automatic setting method for deep foundation pit operations. Background Art

[0002] In modern construction projects, deep foundation pit operations are a common and important construction link. However, the deep foundation pit environment is relatively enclosed with poor air circulation, and as the depth increases, the oxygen concentration may change significantly, posing a potential threat to the safety of operating personnel. Therefore, accurate monitoring and effective management of the oxygen concentration in the deep foundation pit operation environment are crucial.

[0003] Currently, traditional oxygen concentration monitoring methods have some limitations in the deep foundation pit operation scenario. On the one hand, some existing monitoring devices can only perform simple oxygen concentration measurements and cannot automatically adjust monitoring parameters and settings according to environmental factors such as the altitude where the deep foundation pit is located, resulting in inaccurate monitoring results and unable to truly reflect the actual oxygen content. For example, at different altitudes, factors such as atmospheric pressure will affect the actual concentration of oxygen, but existing devices often ignore this important factor, making it possible to misjudge the oxygen concentration in deep foundation pit operations at high altitudes, thus affecting construction safety and personnel health.

[0004] On the other hand, the data interaction and power supply methods between existing monitoring devices and deep foundation pit equipment are not flexible and convenient enough. When some devices are connected to deep foundation pit equipment, complex wiring and interface settings are required, which not only increase the installation cost and time but also may affect the stability and reliability of the monitoring system due to problems such as line failures. In addition, in terms of data transmission, the data transmission protocols of some devices are relatively single and cannot be compatible with deep foundation pit equipment with different degrees of digitization, restricting their wide application in various engineering scenarios.

[0005] In summary, the existing oxygen concentration monitoring technology for deep foundation pit operations is difficult to meet the requirements of accuracy, flexibility, and compatibility in actual projects. There is an urgent need for a new type of monitoring device and method that can combine the characteristics of the deep foundation pit environment, realize automatic setting of oxygen concentration monitoring parameters, and have a convenient and efficient data interaction and power supply method to ensure the safety of deep foundation pit operating personnel and the smooth progress of construction. Summary of the Invention

[0006] Therefore, the embodiments of the present invention provide an oxygen concentration monitoring device and an automatic setting method for deep foundation pit operations to solve the problems in the prior art such as the oxygen concentration monitoring not considering environmental factors, the connection and power supply of the device to equipment being limited, and the poor data interaction compatibility.

[0007] To solve the above problems, an oxygen concentration monitoring device for deep foundation pit operations is provided in an embodiment of the present invention. The device includes an altitude detection module, a non-volatile memory, a communication module, and a processor;

[0008] The altitude detection module is used to measure the altitude at which the deep foundation pit equipment is currently located in real time and transmit the measurement data to the processor;

[0009] The non-volatile memory stores a database of the correspondence between altitude and oxygen content;

[0010] The communication module is connected to the deep foundation pit equipment through a bus and is electrically connected to the processor, and is used to realize data interaction between the monitoring device and the deep foundation pit equipment;

[0011] The processor is electrically connected to the altitude detection module and the non-volatile memory, can receive the altitude data of the altitude detection module, read the corresponding oxygen concentration value from the non-volatile memory according to this data, and send the relevant data to the deep foundation pit equipment through the communication module to realize the setting and transmission of relevant parameters for oxygen concentration monitoring during deep foundation pit operations.

[0012] Preferably, the altitude detection module is built-in with two barometric altimeters, and the average value of the measurement data of the two barometric altimeters is taken as the current altitude to improve the measurement accuracy.

[0013] Preferably, the monitoring device is used as an independent expansion module and is electrically connected to the deep foundation pit equipment through a 4-core cable. Two of the cores are used to provide a power supply of DC9-34V, and the other two cores are used as a data transmission bus to realize power supply and data transmission between the device and the deep foundation pit equipment.

[0014] Preferably, the processor has two data processing modes, specifically as follows:

[0015] Mode 1: Send the upper and lower limit data of the oxygen concentration setting to the deep foundation pit equipment at a fixed frequency. This mode is applicable to deep foundation pit equipment with a relatively low degree of digitization and helps to functionally transform old equipment;

[0016] Mode 2: According to the data protocol list, when the deep foundation pit equipment requests data, the processor sends the corresponding data according to the request.

[0017] Preferably, during the operation of the monitoring device, after the connection is completed, it waits for the request signal for 5 seconds. If the request signal is received within 5 seconds, the processor sends data according to Mode 2; if the request signal is not received within 5 seconds, the processor sends data according to Mode 1.

[0018] Preferably, the data involved includes altimeter 1, altimeter 2, calculated altitude, upper limit of oxygen concentration, and lower limit of oxygen concentration. The data ranges of altimeter 1, altimeter 2, and calculated altitude are all 0 - 5000, and the data ranges of the upper limit of oxygen concentration and the lower limit of oxygen concentration are both 0 - 100.

[0019] An embodiment of the present invention also provides an automatic oxygen concentration setting method for deep foundation pit operations, which is applied to the above-mentioned oxygen concentration monitoring device for deep foundation pit operations, and includes the following steps:

[0020] Connect the cable to power on the monitoring device and automatically perform a self-check operation to ensure that all components of the device are working properly;

[0021] After the self-check is completed, the monitoring device establishes a communication connection with the connected device to build a data interaction channel;

[0022] After the communication connection is completed, the monitoring device starts to wait for a request signal for 5 seconds;

[0023] During the waiting period, if a request signal is received within 5 seconds, the processor sends corresponding data according to the data protocol list in Mode 2 for the data request of the deep foundation pit equipment; if no request signal is received within 5 seconds, the processor sends the upper and lower limit data of the oxygen concentration setting at a fixed frequency in Mode 1;

[0024] Complete the setting of the oxygen concentration so that the monitoring device can monitor and alarm the oxygen concentration according to the set value.

[0025] Preferably, during the process of measuring the altitude, the average value of the measurement data of two groups of altimeters built in the altitude detection module is used to determine the current altitude.

[0026] Preferably, the processor reads the corresponding oxygen concentration value from the altitude - oxygen content database stored in the non - volatile memory according to the altitude information measured by the altitude detection module, so as to automatically set the oxygen concentration according to the altitude.

[0027] Preferably, the monitoring device is electrically connected to the deep foundation pit equipment through a 4 - core cable, where 2 cores are used to provide a power supply of DC9 - 34V, and the other 2 cores are used as a data transmission bus to ensure power supply and data transmission between the device and the deep foundation pit equipment.

[0028] From the above technical solutions, it can be seen that the present invention application has the following beneficial effects:

[0029] (1)Precision monitoring considering environmental factors: The altitude detection module measures the altitude in real time. By combining with the database of the corresponding relationship between altitude and oxygen content in the non-volatile memory, the oxygen concentration value can be accurately determined according to the environmental altitude factor, improving the monitoring accuracy.

[0030] (2)Strong data interaction compatibility: The communication module is electrically connected to the processor to realize data interaction between the monitoring device and the deep foundation pit equipment. The processor can send the relevant data after calculation and processing to the deep foundation pit equipment, enhancing the data interaction compatibility and meeting the requirements of different devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly describe the drawings required in the embodiments. By referring to the drawings, the features and advantages of the present invention will be more clearly understood. The drawings are schematic and should not be construed as limiting the present invention in any way. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0032] Figure 1 It is a block diagram of an oxygen concentration monitoring system for deep foundation pit operations provided in the embodiment;

[0033] Figure 2 It is a schematic diagram of the relationship between oxygen concentration value and altitude;

[0034] Figure 3 It is a flowchart of an automatic setting method for oxygen concentration in deep foundation pit operations provided in the embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0036] Embodiment 1

[0037] To solve the problems in the prior art such as the oxygen concentration monitoring not considering environmental factors, the connection and power supply of the device and equipment being limited, and the poor data interaction compatibility. As Figure 1As shown in the figure, an oxygen concentration monitoring device for deep foundation pit operation provided by an embodiment of the present invention includes an altitude detection module, a non-volatile memory, a communication module, and a processor; the altitude detection module is used to measure the altitude of the deep foundation pit equipment in real time and transmit the measurement data to the processor; the non-volatile memory stores a database of the corresponding relationship between altitude and oxygen content; the communication module is connected to the deep foundation pit equipment through a bus and is electrically connected to the processor, and is used to realize data interaction between the monitoring device and the deep foundation pit equipment; the processor is electrically connected to the altitude detection module and the non-volatile memory, can receive the altitude data of the altitude detection module, read the corresponding oxygen concentration value from the non-volatile memory according to this data, and send the relevant data to the deep foundation pit equipment through the communication module to realize the setting and transmission of relevant parameters for oxygen concentration monitoring in deep foundation pit operation.

[0038] As can be seen from the above technical solution, the present invention provides an oxygen concentration monitoring device for deep foundation pit operation, which is composed of an altitude detection module, a non-volatile memory, a communication module, and a processor. The altitude detection module measures the altitude of the deep foundation pit equipment in real time and transmits the data to the processor. The processor reads the corresponding oxygen concentration value from the non-volatile memory according to this data, and then transmits the relevant data to the deep foundation pit equipment through the communication module to realize the setting and transmission of oxygen concentration monitoring parameters. This device has significant advantages. Firstly, in terms of considering environmental factors, it fully considers the influence of altitude on oxygen concentration, changes the deficiency of traditional monitoring that does not pay attention to environmental factors, greatly improves the accuracy of monitoring, can more accurately reflect the actual oxygen situation in the deep foundation pit, and provides reliable information for operators. Secondly, in terms of data interaction compatibility, the communication module and the processor work together effectively to solve the problem of poor data interaction compatibility with deep foundation pit equipment, ensure the stability and efficiency of data transmission, enable the device to better adapt to various deep foundation pit equipment, and provide a solid guarantee for oxygen concentration monitoring in deep foundation pit operation, comprehensively guaranteeing the life safety of operators.

[0039] In this embodiment, the altitude detection module of this monitoring device is built-in with two barometric altimeters, and its operation is based on the principle that atmospheric pressure changes with altitude. During actual measurement, the two barometric altimeters measure the atmospheric pressure at the location of the equipment at the same time. Since there is a specific mathematical relationship between atmospheric pressure and altitude, the algorithm inside the barometric altimeter will convert the measured atmospheric pressure value into the corresponding altitude value. To reduce measurement errors and improve the accuracy and stability of measurement, the system adopts the method of taking the average value of the measurement data of the two barometric altimeters to finally determine the altitude of the equipment at present and transmit this data to the processor in real time. For example, at a construction site of a deep foundation pit, the two barometric altimeters measure the altitude to be 35.5 meters and 35.7 meters respectively. After average calculation, the altitude data transmitted to the processor is 35.6 meters.

[0040] In this embodiment, a database of the corresponding relationship between altitude and oxygen content, which is constructed through a large number of experiments, on-site monitoring, and professional research, is stored in the non-volatile memory of this monitoring device. This database has been repeatedly verified and calibrated to ensure the accuracy and reliability of the data. When the processor receives the altitude data transmitted by the altitude detection module, it can quickly find the corresponding oxygen concentration value in this database. The relationship between the oxygen concentration value and the altitude is as Figure 2 shown. For example, when the altitude received by the processor is 100 meters, the corresponding oxygen concentration value read from the database is approximately 20.5%.

[0041] In this embodiment, the communication module of this monitoring device is connected to external connection devices through a bus and is also electrically connected to the processor. As an independent expansion module, this device is electrically connected to the deep foundation pit equipment through a 4-core cable. Two of the cores are used to provide a power supply of DC9-34V to ensure the stable operation of the device in the complex and changeable environment of the deep foundation pit; the other two cores serve as a data transmission bus to realize the two-way data transmission between the device and the deep foundation pit equipment. It can not only send the monitoring data and setting parameters of the device to the deep foundation pit equipment but also receive the information feedback from the deep foundation pit equipment.

[0042] In this embodiment, the processor of this monitoring device is electrically connected to the altitude detection module and the non-volatile memory, and is responsible for receiving the altitude data transmitted by the altitude detection module and reading the corresponding oxygen concentration value from the non-volatile memory based on this data. Then, the processor will send setting parameters to the controller of the gas monitoring device to control the operation of the gas monitoring device. At the same time, the processor has two data processing modes:

[0043] Mode 1: Applicable to deep foundation pit equipment with a relatively low degree of digitization. In this mode, the processor sends the upper and lower limit data of the oxygen concentration setting to the deep foundation pit equipment at a fixed frequency. For example, every 10 seconds, the processor will send the data with an oxygen concentration upper limit of 23% and a lower limit of 18% to the deep foundation pit equipment, which helps to carry out functional transformation on old equipment so that it can monitor and judge the oxygen concentration in the deep foundation pit based on this data.

[0044] Mode 2: When the deep foundation pit equipment makes a data request according to the data protocol list, the processor sends the corresponding data according to this mode according to the request. For example, when the deep foundation pit equipment requests to obtain the real-time measurement value of the current oxygen concentration, after receiving the request, the processor will quickly send the calculated or oxygen concentration data obtained from relevant sensors to the deep foundation pit equipment.

[0045] The data involved is shown in Table 1 below, including altimeter 1, altimeter 2, calculated altitude, upper limit of oxygen concentration, and lower limit of oxygen concentration. The data ranges of altimeter 1, altimeter 2, and calculated altitude are all 0 - 5000, and the data ranges of the upper limit of oxygen concentration and the lower limit of oxygen concentration are both 0 - 100.

[0046] Table 1 Data Definition

[0047] Serial number Item Data range Remarks 1 Barometric altimeter 1 0-5000 2 Barometric altimeter 2 0-5000 3 Calculated altitude 0-5000 4 Upper limit of oxygen concentration 0-100 5 Lower limit of oxygen concentration 0-100

[0048] In addition, during the operation of the monitoring device, after the connection is completed, it will wait for the request signal for 5 seconds. If the request signal is received within 5 seconds, the processor sends data according to Mode 2; if the request signal is not received within 5 seconds, the processor sends data according to Mode 1. Such a design can flexibly select an appropriate data transmission method according to the actual situation of deep foundation pit equipment, improving the compatibility and adaptability of the system.

[0049] Embodiment 2

[0050] As Figure 3 shown, the present invention provides an automatic oxygen concentration setting method for deep foundation pit operations. This method is applied to the deep foundation pit oxygen concentration monitoring device in Embodiment 1 above and specifically includes:

[0051] Connect the cable to power on the monitoring device and automatically perform a self-check operation to ensure that all components of the device are working properly;

[0052] After the self-check is completed, the monitoring device establishes a communication connection with the connected device to build a data interaction channel;

[0053] After the communication connection is completed, the monitoring device starts to wait for the request signal for 5 seconds;

[0054] During the waiting period, if the request signal is received within 5 seconds, the processor sends corresponding data according to Mode 2 based on the data protocol list for the data request of the deep foundation pit equipment; if the request signal is not received within 5 seconds, the processor sends the upper and lower limit data of the oxygen concentration setting at a fixed frequency according to Mode 1;

[0055] Complete the setting of the oxygen concentration so that the monitoring device can monitor and alarm the oxygen concentration according to the set value.

[0056] Specifically, first, connect the monitoring device to the deep foundation pit equipment through a 4-core cable and access a power supply of DC9 - 34V to power on the monitoring device. After powering on, the monitoring device automatically starts a self-check program to comprehensively detect each component of the device. For example, perform accuracy calibration on the barometric altimeter of the altitude detection module, check the data processing ability of the processor, test the data transmission stability of the communication module, and the data storage and reading functions of the non-volatile memory, etc., to ensure that each component of the device works properly and provide a reliable guarantee for subsequent data monitoring and setting.

[0057] After the self-check is completed, the monitoring device establishes a communication connection with the deep foundation pit equipment through the data transmission bus of the 4-core cable. During this process, both sides perform handshaking and parameter configuration according to the pre-set data protocol, confirm parameters such as the communication interface, data transmission rate, data format, etc., and build a stable data interaction channel to achieve two-way data transmission between the monitoring device and the deep foundation pit equipment.

[0058] After the communication connection is completed, the monitoring device starts to wait for a request signal for 5 seconds. During these 5 seconds of waiting:

[0059] If a request signal is received within 5 seconds, the processor works in mode 2. The processor will, according to the data request put forward by the deep foundation pit equipment based on the data protocol list, obtain the corresponding data from the data stored in itself or through real-time calculation and send it to the deep foundation pit equipment. For example, if the deep foundation pit equipment requests to obtain the oxygen concentration setting value corresponding to the current altitude, the processor will, according to the received altitude data, read the corresponding oxygen concentration value from the non-volatile memory and send it to the deep foundation pit equipment.

[0060] If no request signal is received within 5 seconds, the processor works in mode 1 and sends the upper and lower limit data of the oxygen concentration setting to the deep foundation pit equipment at a fixed frequency. For example, every 15 seconds, the processor will send data with an oxygen concentration upper limit of 22% and a lower limit of 19% to the deep foundation pit equipment to maintain the monitoring function of the deep foundation pit equipment for the oxygen concentration.

[0061] After the above data processing steps, the setting of the oxygen concentration is completed. The gas monitoring device monitors the oxygen concentration in the deep foundation pit working environment in real time according to the received setting value. When the oxygen concentration exceeds the set upper or lower limit range, the gas monitoring device will trigger an alarm mechanism to remind the operators in ways such as audible and visual alarms to ensure the safety of the operators' lives.

[0062] During the implementation of the entire automatic setting method, the average value of the two sets of barometric altimeter measurement data built into the altitude detection module is always used to determine the current altitude when measuring the altitude to ensure the accuracy of the altitude data. At the same time, the processor reads the corresponding oxygen concentration value from the altitude and oxygen content database stored in the non-volatile memory based on the altitude information measured by the altitude detection module, thereby realizing automatic and accurate setting of the oxygen concentration according to the altitude.

[0063] Through the specific implementation of the above deep foundation pit operation oxygen concentration monitoring device and automatic setting method, the present invention can effectively meet the needs of different types of deep foundation pit equipment, improve the accuracy and reliability of oxygen concentration monitoring, and provide strong protection for the safety of deep foundation pit operations.

[0064] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0065] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0066] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1The functions specified in one or more boxes. These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes and / or boxes Figure 1 One process or more processes and / or boxes Figure 1 The steps of the functions specified in one box or more boxes

[0067] Obviously, the above embodiments are only examples for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all implementation manners here. And the obvious changes or variations derived therefrom still fall within the protection scope of the present invention

Claims

1. A deep foundation pit operation oxygen concentration monitoring device, characterized in that: It includes an altitude detection module, a non-volatile memory, a communication module and a processor; The altitude detection module is used to measure the current altitude of the deep foundation pit equipment in real time and transmit the measurement data to the processor; The non-volatile memory stores a database of the corresponding relationship between altitude and oxygen content; The communication module is connected to the deep foundation pit equipment via a bus and is electrically connected to the processor, and is used to realize data interaction between the monitoring device and the deep foundation pit equipment; The processor is electrically connected to the altitude detection module and the non-volatile memory, and is capable of receiving altitude data from the altitude detection module, reading corresponding oxygen concentration values ​​from the non-volatile memory based on the data, and sending relevant data to deep foundation pit equipment through the communication module, so as to realize the setting and transmission of relevant parameters for oxygen concentration monitoring of deep foundation pit operations.

2. The deep foundation pit operation oxygen concentration monitoring device according to claim 1 is characterized in that: The altitude detection module has two sets of built-in barometric altimeters, and the average value of the measurement data of the two sets of barometric altimeters is taken as the current altitude to improve the measurement accuracy.

3. The deep foundation pit operation oxygen concentration monitoring device according to claim 1 is characterized in that: The monitoring device is an independent expansion module and is electrically connected to the deep foundation pit equipment through a 4-core cable, 2 of which are used to provide DC9-34V power supply, and the other 2 are used as a data transmission bus to realize power supply and data transmission between the device and the deep foundation pit equipment.

4. The deep foundation pit operation oxygen concentration monitoring device according to claim 1 is characterized in that: The processor has two data processing modes, as follows: Mode 1: Send the upper and lower limit data of oxygen concentration to deep foundation pit equipment at a fixed frequency. This mode is suitable for deep foundation pit equipment with a low degree of digitization and helps to functionally transform old equipment. Mode 2: According to the data protocol list, when the deep pit equipment makes a data request, the processor sends the corresponding data according to the request.

5. The deep foundation pit operation oxygen concentration monitoring device according to claim 1 is characterized in that: During operation, the monitoring device waits for a request signal for 5 seconds after the connection is completed. If a request signal is received within 5 seconds, the processor sends data in mode 2; if no request signal is received within 5 seconds, the processor sends data in mode 1.

6. The deep foundation pit operation oxygen concentration monitoring device according to any one of claims 1 to 5, characterized in that: The data involved include barometric altimeter 1, barometric altimeter 2, calculated altitude, upper limit of oxygen concentration and lower limit of oxygen concentration. The data ranges of barometric altimeter 1, barometric altimeter 2 and calculated altitude are all 0-5000, and the data ranges of upper limit of oxygen concentration and lower limit of oxygen concentration are all 0-100.

7. A method for automatically setting oxygen concentration in deep foundation pit operation, applied to the deep foundation pit operation oxygen concentration monitoring device according to any one of claims 1 to 6, characterized in that: The following steps are involved: Connect the cables, power on the monitoring device, and automatically perform self-checking to ensure that all components of the device are working properly; After the self-test is completed, the monitoring device establishes a communication link with the connected equipment to realize the establishment of a channel for data interaction; After the communication connection is completed, the monitoring device starts to wait for the request signal, and the waiting time lasts for 5 seconds; During the waiting period, if the request signal is received within 5 seconds, the processor sends the corresponding data according to the data protocol list in mode 2 for the data application of the deep foundation pit equipment; if the request signal is not received within 5 seconds, the processor sends the upper and lower limit data of the oxygen concentration setting at a fixed frequency in mode 1; Complete the setting of oxygen concentration so that the monitoring device can monitor and alarm the oxygen concentration according to the set value.

8. The method for automatically setting oxygen concentration in deep foundation pit operations according to claim 7, characterized in that: In the process of measuring the altitude, the average value of the two sets of barometric altimeter measurement data built into the altitude detection module is used to determine the current altitude.

9. The method for automatically setting oxygen concentration in deep foundation pit operations according to claim 7, characterized in that: The processor reads the corresponding oxygen concentration value from the altitude and oxygen content database stored in the non-volatile memory according to the altitude information measured by the altitude detection module, thereby automatically setting the oxygen concentration according to the altitude.

10. The method for automatically setting oxygen concentration in deep foundation pit operations according to claim 7, characterized in that: The monitoring device is electrically connected to the deep foundation pit equipment via a 4-core cable, 2 cores of which are used to provide DC9-34V power supply, and the other 2 cores are used as a data transmission bus to ensure power supply and data transmission between the device and the deep foundation pit equipment.

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