Constricted space operation object monitoring system

Abstract

The utility model discloses a restricted space operation object monitoring system, and relates to the technical field of signal processing. The system comprises an information acquisition and reminding module, a signal conversion module, at least one signal relay module, a signal receiving module and a remote monitoring host, the information acquisition and reminding module is in communication connection with the signal conversion module; the signal conversion module is in communication connection with the signal relay module closest to the signal conversion module; the signal relay modules are in communication connection; the signal relay module is used for performing relay transmission on the signal sent by the signal conversion module; the signal receiving module is in communication connection with the signal relay module closest to the signal receiving module; the signal receiving module is in communication connection with the remote monitoring host; the remote monitoring host is used for receiving the physical sign parameters and the abnormity reminding information of the operation object, real-time monitoring of the monitoring object and the operation object on the operation object is achieved, and the operation safety of the operation object in the limited space is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of data processing, in particular to a monitoring system for operating objects in confined spaces. Background Art

[0002] Confined space operations involve a wide range of fields, multiple industries, complex working environments, and many dangerous and harmful factors, which are prone to safety accidents and serious consequences. Confined spaces may contain flammable and explosive materials, toxic and harmful substances, or lack of oxygen, which pose a threat to the health and life safety of the work objects.

[0003] At present, the safety of confined space operations is too dependent on manual monitoring and regular reminders of the monitored objects. However, since it is difficult to ensure the real-time and accuracy of manual monitoring of the monitored objects, the accuracy of regular reminders of the monitored objects is poor, and it is difficult to ensure the safety of the operating objects in confined spaces. Summary of the invention

[0004] The utility model provides a monitoring system for operating objects in confined spaces, which realizes real-time monitoring of the operating object by the operating object itself and real-time monitoring of the operating object by the monitoring object, thereby improving the safety of the operating object operating in the confined space.

[0005] According to one aspect of the utility model, a confined space operation object monitoring system is provided, the system comprising: an information collection and reminder module, a signal conversion module, at least one signal relay module, a signal receiving module and a remote monitoring host;

[0006] The information collection and reminder module is worn on the working object in the confined space; the information collection and reminder module is used to collect the vital signs parameters of the working object, send abnormal reminder information to the working object, and send the vital signs parameters and abnormal reminder information of the working object to the monitored object;

[0007] The information collection and reminder module is in communication connection with the signal conversion module; the signal conversion module is used to convert the Bluetooth signal sent by the information collection and reminder module;

[0008] The signal conversion module is communicatively connected to the signal relay module closest to the signal conversion module; each of the signal relay modules is communicatively connected to each other; the signal relay module is used to relay the signal sent by the signal conversion module;

[0009] The signal receiving module is communicatively connected to the signal relay module closest to the signal receiving module; the signal receiving module is used to receive the signal sent by the signal relay module closest to the signal receiving module, and send it to the remote monitoring host;

[0010] The signal receiving module is communicatively connected to the remote monitoring host; the remote monitoring host is used to receive the vital sign parameters and abnormal reminder information of the operating object to prompt the monitored object to perform processing.

[0011] Optionally, the confined space includes a closed space or a semi-closed space with restricted access; the signal relay module is deployed at the passage position for the working object to enter and exit the confined space.

[0012] Optionally, the channel position includes the channel corner.

[0013] Optionally, the information collection and reminder module includes an information collection unit, a reminder unit, a Bluetooth communication unit, a collection control unit and a collection power supply unit; wherein the information collection unit is used to collect vital sign parameters of the object working in the confined space; the reminder unit is used to remind the working object of abnormal conditions; the Bluetooth communication unit is used to communicate with the signal conversion module; the collection control unit is used to control data collection, data processing and data transmission of the information collection unit; the collection power supply unit is used to power the information collection unit, the reminder unit, the Bluetooth communication unit and the collection control unit.

[0014] Optionally, the information acquisition unit is a heart rate and blood oxygen sensor.

[0015] Optionally, the information acquisition unit also includes an analog switch; the analog switch is communicatively connected to the heart rate and blood oxygen sensor; the analog switch is communicatively connected to the acquisition control unit; and the analog switch is used to control the information acquisition frequency of the heart rate and blood oxygen sensor.

[0016] Optionally, the information acquisition unit also includes a linear regulator; the linear regulator is electrically connected to the analog switch; the linear regulator is electrically connected to the heart rate and blood oxygen sensor; the linear regulator is used to stabilize the heart rate and blood oxygen sensor.

[0017] Optionally, the distance between two adjacent signal repeater modules is less than or equal to 50 meters; the distance between the signal relay module and the signal conversion module is less than or equal to 50 meters; the distance between the signal relay module and the signal receiving module is less than or equal to 50 meters.

[0018] Optionally, the distance between the signal conversion module and the information collection and reminder module is less than or equal to 5 meters.

[0019] Optionally, the signal conversion module includes a Bluetooth signal receiving unit, a signal conversion control unit, a LoRa signal sending unit and a WiFi signal sending unit; the signal relay module includes a LoRa relay unit and a WiFi relay unit.

[0020] The technical solution of the embodiment of the utility model is to set up a confined space operation object monitoring system, including: an information collection and reminder module, a signal conversion module, at least one signal relay module, a signal receiving module and a remote monitoring host, wherein the information collection and reminder module is worn on the confined space operation object, the information collection and reminder module is used to collect the vital sign parameters of the operation object, send abnormal reminder information to the operation object, and send the vital sign parameters and abnormal reminder information of the operation object to the monitored object, the information collection and reminder module is communicated with the signal conversion module, the signal conversion module is used to convert the Bluetooth signal sent by the information collection and reminder module, the signal conversion module is communicated with the signal relay module closest to the signal conversion module, the signal relay modules are communicated with each other, the signal relay module is used to relay the signal sent by the signal conversion module, the signal receiving module is communicated with the signal relay module closest to the signal receiving module, and the signal receiving module communicates with the remote monitoring host. The signal receiving module is used to receive the signal sent by the signal relay module closest to the signal receiving module, and send it to the remote monitoring host. The remote monitoring host is used to receive the vital signs parameters and abnormal reminder information of the operating object to prompt the monitored object to process, which solves the problem that the safety of confined space operations is too dependent on manual monitoring and regular reminders of the monitored object. When it is difficult to ensure the real-time and accuracy of manual monitoring of the monitored object, the accuracy of the regular reminders of the monitored object is poor, and it is difficult to ensure the safety of the operating object working in the confined space. The real-time monitoring of the operating object by the monitoring object and the operating object at the same time improves the safety of the operating object working in the confined space; in addition, through multiple signal relay modules, multi-level signal relay of the vital signs parameters and abnormal reminder information of the operating object is realized, which ensures the stability of the long-distance transmission of the signal and further ensures the safety of the operating object; in addition, the multi-level signal relay has strong scalability, which improves the practicality of the confined space operation object detection system.

[0021] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a structural schematic diagram of a confined space operation object monitoring system provided according to an embodiment of the utility model;

[0024] Figure 2 It is a structural schematic diagram of a confined space operation object monitoring system provided according to an embodiment of the utility model;

[0025] Figure 3 A schematic diagram of the structure of a smart bracelet provided according to an embodiment of the utility model;

[0026] Figure 4 A circuit schematic diagram of an information acquisition unit provided according to an embodiment of the utility model;

[0027] Figure 5 It is a structural schematic diagram of a confined space operation object monitoring system provided according to an embodiment of the utility model;

[0028] Figure 6 A flow chart of a signal relay mode selection method provided according to an embodiment of the utility model;

[0029] Figure 7 A schematic diagram of the structure of a signal conversion module provided according to an embodiment of the utility model;

[0030] Figure 8 A schematic diagram of the deployment positions of various modules in the confined space operation object monitoring system provided according to an embodiment of the utility model;

[0031] Fig. 9 A schematic diagram of the structure of a signal relay module provided according to an embodiment of the utility model;

[0032] Fig.10 A schematic diagram of the structure of a signal receiving module provided according to an embodiment of the utility model;

[0033] Fig.11 The present invention is a flowchart of a method for monitoring an object in a confined space according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0036] Example

[0037] Figure 1 The present invention provides a structural diagram of a confined space operation object monitoring system. This embodiment is applicable to the situation of remote monitoring of confined space operation objects.

[0038] like Figure 1 As shown, the system includes: an information collection and reminder module 100, a signal conversion module 200, at least one signal relay module 300, a signal receiving module 400 and a remote monitoring host 500. The information collection and reminder module 100 is connected in communication with the signal conversion module 200. The signal conversion module 200 is connected in communication with the signal relay module 300 closest to the signal conversion module 200. Each signal relay module 300 is connected in communication with each other. The signal receiving module 400 is connected in communication with the signal relay module 300 closest to the signal receiving module 400. The signal receiving module 400 is connected in communication with the remote monitoring host 500.

[0039] Confined spaces may include spaces with restricted access or poor ventilation. Confined spaces may include enclosed spaces or semi-enclosed spaces. Confined space operations involve a wide range of fields, multiple industries, a complex operating environment, and many dangerous and harmful factors, which are prone to safety accidents and serious consequences. Confined spaces may contain dangers such as flammable and explosive materials, toxic and harmful substances, or lack of oxygen, which may pose a threat to the health and life safety of the operating object. The operating object may be an object that performs operations in a confined space. Exemplarily, the operating object may include people or animals operating in a confined space.

[0040] The information collection and reminder module 100 is worn on the working object in the confined space. The information collection and reminder module 100 is used to collect the vital signs parameters of the working object, send abnormal reminder information to the working object, and send the vital signs parameters and abnormal reminder information of the working object to the monitored object. Exemplarily, the information collection and reminder module 100 may include a Bluetooth bracelet, a head-mounted device or a wearable device.

[0041] Optional, such as Figure 2 As shown, the information collection and reminder module 100 includes an information collection unit 110 , a reminder unit 120 , a Bluetooth communication unit 130 , a collection control unit 140 and a collection power supply unit 150 .

[0042] Among them, the information collection unit 110 is used to collect the vital sign parameters of the working object in the confined space. The reminder unit 120 is used to remind the working object of abnormal conditions. Optionally, the reminder unit 120 may include a display subunit, a vibration subunit and a buzzer subunit. When in use, when the vital sign parameters measured by the information collection unit 110 are in an abnormal range, a text message pop-up window can be displayed on the screen through the display subunit of the reminder unit 120 to remind the working object to pay attention to his or her vital sign parameters. If the working object does not process the pop-up window reminder within the first preset time, the buzzer subunit of the reminder unit 120 can be used to remind the working object again in a sound mode. If the working object still does not process the pop-up window reminder within the second preset time, the vibration subunit of the reminder unit 120 can be used to remind the working object again in the form of adding a vibration mode on the basis of the sound mode. If the working object still does not process the pop-up window reminder within the third preset time, the abnormal reminder information can be actively sent to the signal conversion module 200 through the Bluetooth communication unit 130. Among them, the first preset time is less than the second preset time; the second preset time is less than the third preset time. For example, the first preset time can be 5s; the second preset time can be 15s; and the third preset time can be 25s. The smart bracelet reminds through multiple levels such as text messages, sounds, and vibrations, which increases the awareness of the operating object to the reminder, so as to ensure that the operating object can pay attention to the abnormal vital sign parameters in time; by setting a reasonable time window, it is ensured that the operating object can respond within the preset time, reducing the possibility of missed alarms, and by providing multiple reminders in different time periods, it is ensured that timely and effective measures can be taken in an emergency, so as to maximize the safety of the operating object in the confined space.

[0043] The abnormal reminder information is used to characterize that the vital sign parameters of the working object in the confined space are abnormal. The Bluetooth communication unit 130 is used to communicate with the signal conversion module 200. Optionally, the Bluetooth communication unit 130 can send the vital sign parameters of the working object collected by the information collection unit 110 to the signal conversion module 200 at a fixed time interval. The acquisition control unit 140 is used to control the data acquisition, data processing and data transmission of the information acquisition unit 110. The acquisition power supply unit 150 is used to power the information acquisition unit 110, the reminder unit 120, the Bluetooth communication unit 130 and the acquisition control unit 140. Optionally, the acquisition power supply unit 150 may include a charging circuit, a step-down circuit and a lithium battery. Among them, the charging circuit may indicate the charging state with an LED light. The charging circuit may include a battery voltage acquisition circuit. The charging circuit can obtain the battery voltage collected by the battery voltage acquisition circuit. The collected battery voltage is converted into a battery voltage value by the acquisition control unit 140. Optionally, the battery voltage can be displayed on the display unit in the form of a battery voltage value. The step-down circuit can be used to step down the output voltage of the lithium battery to power the acquisition control unit 140 and the information acquisition unit 110. Among them, the lithium battery can be a 3.7V high-temperature resistant lithium battery; the capacity of the lithium battery can be 400mAh; the specification of the lithium battery can be 4mm×30mm×30mm. Optionally, the step-down circuit can adopt a DC-DC step-down solution. Exemplarily, when the lithium battery is a 3.7V high-temperature resistant lithium battery, the step-down circuit can output 3.3V to power the acquisition control unit 140 and the information acquisition unit 110. In order to reduce power consumption, the acquisition power supply unit 150 is designed with an enable pin. When the enable pin is pulled high, the step-down circuit starts to work.

[0044] Exemplarily, the information collection and reminder module 100 may be a smart bracelet. The smart bracelet may be worn on the work object to monitor the vital signs of the work object. The vital signs may include heart rate, blood pressure, and blood oxygen. After the smart bracelet is turned on, it can automatically detect the vital signs of the work object in real time, and can also encapsulate the vital signs of the work object and transmit them via Bluetooth broadcast. Figure 3As shown, the smart bracelet includes an information collection unit 110, a button unit 120, a collection control unit 140, a display unit, a Bluetooth communication unit 130, a reminder unit 120 and a collection power supply unit 150. Among them, the button unit is used to turn on the smart bracelet, turn off the smart bracelet and receive active alarm information of the operating object. Among them, the active alarm information is the alarm information sent by the operating object through the button. It can be determined whether the operating object presses the button by monitoring the level input of the I / O pin connected to the button. The display unit is used to display the system information of the system and interact with the operating object. Exemplarily, the display unit may include a display screen and a display circuit. Among them, the display screen may be a capacitive touch LCD screen; the display screen specification of the display unit may be 1.69 inches. The FPC (Flexible Printed Circuit board, flexible printed circuit board) row seat can be selected to connect the display screen and the display circuit. The collection control unit 140 can be connected to the information collection unit 110, the Bluetooth communication unit 130, the reminder unit 140, the collection power supply unit 150, the display unit and the button unit respectively to obtain and process the vital signs parameters of the operating object in the confined space sent by the information collection unit 110. The acquisition control unit 140 is mainly used to control the data acquisition, data processing and data transmission of the information acquisition unit 110. Since the number of sensors connected to the smart bracelet is large, the acquisition control unit 140 needs to have a higher processing speed and sufficient I / O pins. Exemplarily, the minimum system of the acquisition control unit 140 may include a crystal oscillator circuit, a button control circuit and a download and debug interface circuit. The operating voltage of the minimum system of the acquisition control unit 140 can be 3.3V; a 32.768KHz crystal oscillator can be selected as an external clock source; a 4-pin socket can be used as a download and debug port to download programs to the MCU (micro control unit). The acquisition control unit 140 may also include a storage circuit for recording and storing information collected by the information acquisition unit 110 and other data in the system.

[0045] This scheme concretizes the information collection and reminder module into an information collection unit, a reminder unit, a Bluetooth communication unit, a collection control unit and a collection power supply unit. Based on the information collection unit, it realizes the detection of the vital sign parameters of the working object in the confined space. Based on the reminder unit, it realizes the abnormal state reminder of the working object. Based on the Bluetooth communication unit, it realizes the transmission of the vital sign parameters and abnormal reminder information collected by the information collection unit to the remote monitoring host, thereby realizing the remote monitoring of the working object by the monitored object. Based on the collection control unit, it realizes the data collection, data processing and data transmission of the information collection unit. Based on the collection power supply unit, it realizes the power supply to the information unit, the reminder unit, Bluetooth communication unit and the collection control unit, thereby ensuring the stability of the operation of the information collection and reminder module, thereby improving the working safety of the working object in the confined space.

[0046] Optionally, the information collection unit 110 is a heart rate and blood oxygen sensor 111.

[0047] Among them, the heart rate and blood oxygen sensor 111 can be used to detect the heart rate and blood oxygen of the operating object. Correspondingly, the vital sign parameters of the operating object may include heart rate and blood oxygen. The heart rate and blood oxygen sensor 111 can use infrared (IR, Infrared) and red light emitting diodes (LED, light emitting diode) to emit light, and can use a photodiode (Photodetector) to detect reflected light. By measuring the change in the amount of red light absorption caused by blood movement, the heart rate and blood oxygen sensor 111 can calculate the heart rate. By measuring the difference in the absorption of red light and infrared light in the blood, the heart rate and blood oxygen sensor 111 can calculate the oxygen saturation in the blood.

[0048] This solution concretizes the information collection unit into a heart rate and blood oxygen sensor, which realizes the detection of the heart rate and blood oxygen of the working object. By selecting typical data in the vital sign parameters to monitor the working object, the monitoring efficiency of the working object is further improved, thereby improving the practicality of this confined space working object monitoring system.

[0049] Optionally, the information acquisition unit 110 further includes an analog switch 112. The analog switch 112 is communicatively connected to the heart rate and blood oxygen sensor 111. The analog switch 112 is communicatively connected to the acquisition control unit 140. The analog switch 112 is used to control the information acquisition frequency of the heart rate and blood oxygen sensor 111.

[0050] Considering that the heart rate and blood oxygen sensor 111 of the information acquisition unit 110 is a high-energy consumption device, the heart rate and blood oxygen sensor 111 can be turned on only when the heart rate and blood oxygen monitoring function is required to save power consumption. The analog switch 112 can be used to switch different signal paths to control the turning on and off of the heart rate and blood oxygen sensor 111. Specifically, Figure 4As shown, U19 is an analog switch 112. The analog switch 112 is connected to the MAX-EN pin of the acquisition control unit 140 through the ENB pin. By enabling the control ENB pin, the analog switch 112 is controlled, and the opening and closing of the heart rate blood oxygen sensor 111 are controlled. Optionally, the A1 pin of the analog switch 112 can be directly connected to the heart rate blood oxygen sensor 111; the A2 pin of the analog switch 112 is grounded; the VCC and B pins of the analog switch 112 are connected to the power supply 3V3 (i.e., 3.3V power supply). The level of the ENB pin is controlled by the MAX-EN pin of the acquisition control unit 140: when the ENB pin is high, the analog switch 112 is turned on, A1 and B are connected, and the heart rate blood oxygen sensor 111 works; when the ENB pin is low, the analog switch 112 is turned off, A2 and B are connected, and the signal is not allowed to pass between A1 and B, then the heart rate blood oxygen sensor 111 is turned off.

[0051] This solution controls the opening and closing of the heart rate and blood oxygen sensor through an analog switch, thereby controlling the collection frequency of the heart rate and blood oxygen sensor, thereby reducing the power consumption of the information collection and reminder module, improving the battery life of the system, and further ensuring the safety of objects working in confined spaces.

[0052] Optionally, the information acquisition unit 110 further includes a linear regulator 113 ; the linear regulator 113 is electrically connected to the analog switch 112 ; and the linear regulator 113 is electrically connected to the heart rate and blood oxygen sensor 111 .

[0053] like Figure 4 As shown, U16 is a linear regulator 113. The linear regulator 113 is used to stabilize the heart rate blood oxygen sensor 111. Referring to the above example, the A1 pin of the analog switch 112 can be connected to the VIN terminal of the linear regulator 113. The VIN input voltage of the linear regulator 113 can be 3.3V. The linear regulator 113 steps down the voltage to 1.8V to power the heart rate blood oxygen sensor.

[0054] This solution introduces a linear regulator between the analog switch and the heart rate and blood oxygen sensor. The linear regulator is used to stabilize the input voltage of the heart rate and blood oxygen sensor, further ensuring the normal operation of the heart rate and blood oxygen sensor, thereby improving the safety of objects working in confined spaces.

[0055] Optionally, the information acquisition unit 110 further includes at least one capacitor, which is connected in parallel with the linear regulator 113. The capacitor is used to filter high-frequency noise on the line or stabilize the output voltage.

[0056] For example, Figure 4As shown, the capacitors may include C43, C44 and C45. C43 and C44 may be 100nF capacitors for filtering out high frequency noise on the power line. C45 may be a 10μF capacitor for stabilizing the output voltage. C45 may avoid voltage drop by providing a fast response under transient loads.

[0057] The signal conversion module 200 is used to convert the Bluetooth signal sent by the information collection and reminder module 100. It can be understood that the information collection and reminder module 100 sends the collected vital sign parameters of the working object to the signal conversion module 200 in the form of Bluetooth broadcast. Optionally, when there is an abnormality in the vital sign parameters of the working object in the confined space, the information collection and reminder module 100 can also send abnormal reminder information to the signal conversion module 200.

[0058] Optionally, the distance between the signal conversion module 200 and the information collection and reminder module 100 is less than or equal to 5 meters.

[0059] The signal conversion module 200 and the information collection and reminder module 100 use Bluetooth signal communication. In order to ensure the stability of data transmission, considering the transmission distance of Bluetooth signal communication, the distance between the signal conversion module 200 and the information collection and reminder module 100 is set to be less than or equal to 5 meters, so that data can be stably transmitted between the two.

[0060] Optional, such as Figure 5 As shown, the signal conversion module 200 includes a Bluetooth signal receiving unit 210 , a signal conversion control unit 220 , a LoRa signal sending unit 230 and a WiFi signal sending unit 240 .

[0061] The signal conversion module 200 can be used to convert the Bluetooth signal sent by the information collection and reminder module 100 into a LoRa (Long Range) signal or a WiFi (Wireless Fidelity) signal.

[0062] Among them, the Bluetooth signal receiving unit 210 is used to monitor the Bluetooth broadcast of the information collection and reminder module 100, and send the Bluetooth broadcast packet to the signal conversion control unit 220. Among them, the Bluetooth signal receiving unit 210 can be set to a scanning mode, and communicate with the signal conversion control unit 220 through a UART (Universal Asynchronous Receiver / Transmitter) interface. The Bluetooth signal receiving unit 210 screens out the Bluetooth broadcast packet containing the vital signs parameters and / or abnormal reminder information of the confined space operation object by verifying the format of the Bluetooth broadcast packet. After receiving the Bluetooth broadcast packet containing the vital signs parameters and / or abnormal reminder information of the confined space operation object, a string containing the vital signs parameters and / or abnormal reminder information of the confined space operation object can be sent to the signal conversion control unit 220 through the serial port. Optionally, when the Bluetooth signal receiving unit 210 is initialized, the initialization configuration parameters of the Bluetooth signal receiving unit 210 include baud rate, Bluetooth version, working mode and scanning interval, etc.

[0063] The WiFi signal sending unit 240 is used to establish a connection with the local area network, obtain the IP (Internet Protocol) address of the signal conversion module 200 in the local area network and create a TCP (Transmission Control Protocol) client, encapsulate the data information (i.e., the vital signs parameters of the confined space operation object) into a TCP data packet, and send it to the connected signal relay module 300 through the Wi-Fi connection. Optionally, when the WiFi signal sending unit 240 is initialized, the initialization configuration parameters of the WiFi signal sending unit 240 include the SSID (Service Set Identifier) ​​of the WiFi local area network, the password of the WiFi local area network, the IP address of the remote monitoring host, and the port number of the remote monitoring host.

[0064] The LoRa signal sending unit 230 is used to send the received LoRa data packet to the signal relay module 300 in the form of a LoRa wireless signal when the WiFi signal is poor. Optionally, the LoRa signal sending unit 230 can communicate with the signal conversion control unit 220 via SPI (Serial Peripheral Interface). Optionally, when the LoRa signal sending unit 230 is initialized, the initialization configuration parameters of the LoRa signal sending unit 230 include operating frequency, transmission frequency, spreading factor, code rate and bandwidth, etc.

[0065] The signal conversion control unit 220 is respectively connected to the Bluetooth signal receiving unit 210, the LoRa signal sending unit 230 and the WiFi signal sending unit 240, and is used to process the data received by the Bluetooth signal receiving unit 210. The signal conversion control unit 220 can read and parse the character string sent by the Bluetooth signal receiving unit 210 through the UART interface, and extract the vital signs parameters and / or abnormal reminder information of the confined space working object according to the Bluetooth broadcast packet format specified by the Bluetooth protocol, and then establish a TCP connection through the WiFi signal sending unit 240 and send the data to the signal relay module 300; when the WiFi signal is not good, the data can be encapsulated into a LoRa data packet in the format specified by the LoRa protocol, and sent to the LoRa signal sending unit 230 through the SPI interface. Specifically, the signal conversion module 200 can automatically select the signal relay mode according to the strength of the WiFi signal and the quality of the TCP connection. For example, Figure 6 As shown, when the RSSI (Received Signal Strength Indication) value of the WiFi signal is below -80dBm, or the packet loss rate of the TCP connection exceeds 5%, it is considered that there is a problem with the transmission of the WiFi signal, and the signal conversion module 200 will automatically switch to the LoRa signal relay mode. In a confined space, when the WiFi signal of the LAN is unstable or interrupted, data can still be transmitted through the LoRa signal, which can maximize the protection of the safety of the objects working in the confined space.

[0066] Illustratively, the protocol provisions of the Bluetooth broadcast packet are shown in Table 1.

[0067] Table 1 Bluetooth advertising packet protocol

[0068]

[0069] The protocol of Bluetooth broadcast packet stipulates that Bluetooth broadcast packet includes header, status code, payload length, payload entity, check code and packet tail. Among them, the header is fixed to 0x68. The specific definition of status code is shown in Table 2. The payload length includes two bytes; the low byte is in front, which is used to represent the byte length of the content data field. The payload entity is the physical parameter of the confined space operation object. The check code can be obtained by adding all bytes of the header, status code, payload length and payload entity and taking the lower byte. The packet tail is fixed to 0x16.

[0070] Table 2 Specific definition of status code

[0071] Status Code Encoding meaning 0x01 The equipment at the operation end is normal 0x02 Active alarm at the operation end

[0072] Among them, the status code is 0x01, which is used to indicate that the equipment on the operation end (i.e., the information collection and reminder module 100) is normal; the status code is 0x02, which is used to indicate that the operation end (i.e., the information collection and reminder module 100) actively alarms, that is, the active alarm information of the operation object is received.

[0073] The protocol provisions of the LoRa data packet are shown in Table 3;

[0074] Table 3 Protocol provisions of LoRa data packets

[0075]

[0076] The protocol of the LoRa data packet stipulates that the LoRa data packet includes an address code, a status code, a payload length, a payload entity, a check code low byte, and a check code high byte.

[0077] like Figure 7 As shown, the signal conversion module 200 may further include a conversion power supply unit. The conversion power supply unit is used to supply power to the Bluetooth signal receiving unit 210, the signal conversion control unit 220, the LoRa signal sending unit 230 and the WiFi signal sending unit 240.

[0078] The signal relay module 300 is used to relay the signal sent by the signal conversion module 200 .

[0079] Among them, the signal relay module 300 can be a signal relay base station. The number of signal relay modules 300 is at least one. The number of deployed signal relay modules 300 can be determined according to the size of the confined space and / or the signal transmission capability of the signal relay module 300. It can be understood that the larger the confined space, the more the number of deployed signal relay modules 300; the smaller the confined space, the fewer the number of deployed signal relay modules 300. Similarly, the stronger the signal transmission capability of the signal relay module 300, the fewer the number of deployed signal relay modules; the weaker the signal transmission capability of the signal relay module 300, the more the number of deployed signal relay modules. Under the premise of ensuring the signal transmission stability of the signal relay module 300, the number of signal relay modules 300 is reduced as much as possible.

[0080] This solution adopts at least one signal relay module. Based on the size of the confined space and / or the signal transmission capability of the signal relay module, the number of deployed signal relay modules can be adjusted in time, and the signal relay module can automatically form a network after power-on, so as to realize flexible self-organizing network and multi-level relay in the confined space. It has scalability and is more applicable in confined spaces. In addition, while satisfying the stability of signal transmission, the number of signal relay modules can be flexibly adjusted, and the cost can also be reduced, thereby further improving the applicability of this system in confined spaces.

[0081] Optionally, the confined space includes a closed space or a semi-closed space with restricted access; the signal relay module 300 is deployed at the passage position for the working object to enter and exit the confined space.

[0082] Confined spaces may include enclosed spaces or semi-enclosed spaces with restricted access. The reason for restricted access to confined spaces may be that, in addition to the passages in and out of the confined space, there are obstacles in other areas of the confined space. In order to avoid the impact of obstacles on data transmission and ensure the stability of the transmission of vital sign parameters of the objects working in the confined space, the signal relay module 300 may be deployed at the passage position where the objects enter and exit the confined space. Due to the complexity of the confined space working environment, there may be physical obstacles and narrow passages. In order to realize long-distance and complex environment networking communications in confined spaces, the confined space working object monitoring system may adopt multi-level relay networking. For example, Figure 8 As shown, the signal acquisition and reminder module 110 can be worn on the body of the working object in the confined space, and the signal acquisition and reminder module 110 can send the vital signs parameters and / or abnormal reminder information of the working object to the signal conversion module 200 by means of Bluetooth signal broadcasting. The signal conversion module 200 uses WiFi signals or LoRa signals to send the vital signs parameters and / or abnormal reminder information of the working object to multiple signal relay modules 300. WiFi signals or LoRa signals can be used to transmit data between multiple signal relay modules 300. The signal relay module 300 closest to the signal receiving module 400 sends data to the signal receiving module 400. The signal receiving module 400 sends it to the remote monitoring host 500. Optionally, the signal conversion module 200, the signal relay module 300 and the signal receiving module 400 can be deployed along the wall position of the passageway entering and exiting the confined space.

[0083] This solution concretizes the confined space into a closed space or semi-enclosed space with restricted access and exit, takes into account the environmental conditions of the confined space, and deploys the signal relay module at the channel position where the working object enters and exits the confined space, thereby simplifying the deployment method of the signal relay module and ensuring the stability of long-distance data transmission of the signal relay module, thereby improving the safety of working objects in confined spaces.

[0084] Optionally, the channel position includes channel corners.

[0085] Among the various channel positions where the working object enters and exits the confined space, the channel corners are more likely to block the signal and cause signal attenuation than other positions.

[0086] This solution takes into account the influence of channel corners on signal transmission by specifying the channel position to include channel corners, further improving the stability of long-distance transmission of the signal relay module, thereby improving the safety of the operating object operating in confined spaces.

[0087] Optional, such as Figure 5 As shown, the signal relay module 300 includes a LoRa relay unit 310 and a WiFi relay unit 320 .

[0088] The LoRa relay unit 310 can be used to receive data sent by the LoRa signal sending unit 230, and realize the automatic relay networking function to realize ultra-long-distance or complex environment networking communication. The WiFi relay unit 320 can be used to receive data sent by the WiFi signal sending unit 240, and realize the automatic relay networking function to realize ultra-long-distance or complex environment networking communication. The signal relay of the vital sign parameters and / or abnormal warning information of the confined space operation object adopts multi-channel redundant signal transmission, which can support two relay modes of WiFi signal and LoRa signal.

[0089] This solution concretizes the signal conversion module into a Bluetooth signal receiving unit, a signal conversion control unit, a LoRa signal sending unit and a WiFi signal sending unit, and concretizes the signal relay module into a LoRa relay unit and a WiFi relay unit. It can intelligently select the appropriate signal relay method based on the strength of the WiFi signal and the quality of the TCP connection, thereby ensuring the stability of data transmission to meet the signal transmission requirements in confined spaces.

[0090] Optionally, the distance between two adjacent signal repeater modules 300 is less than or equal to 50 meters; the distance between the signal relay module 300 and the signal conversion module 200 is less than or equal to 50 meters; the distance between the signal relay module 300 and the signal receiving module 400 is less than or equal to 50 meters.

[0091] The indoor coverage of WiFi signals is usually 30 meters to 50 meters; the maximum transmission distance of LoRa signals is usually 50 meters to 150 meters. Considering the indoor coverage of WiFi signals and the maximum transmission distance of LoRa signals, the distance between two adjacent signal repeater modules 300 can be set to be less than or equal to 50 meters, the distance between the signal relay module 300 and the signal conversion module 200 can be set to be less than or equal to 50 meters, and the distance between the signal relay module 300 and the signal receiving module 400 can be set to be less than or equal to 50 meters, so as to take into account the signal coverage of both the WiFi signal relay and the LoRa signal relay modes. Optionally, after the signal relay module 300 is deployed, a WiFi signal test tool can be used to check the WiFi signal strength, and according to the WiFi signal strength, the actual indoor coverage of the WiFi signal can be determined, and then the distance between two adjacent signal repeater modules, the distance between the signal relay module and the signal conversion module, and the distance between the signal relay module and the signal receiving module can be adjusted.

[0092] This solution takes into account the signal coverage range of different relay modes of the signal repeater modules, and further improves the stability of long-distance data transmission of the signal relay module.

[0093] like Fig. 9 As shown, the signal relay module 300 may further include a relay power supply unit. The relay power supply unit is used to supply power to the LoRa relay unit and the WiFi relay unit.

[0094] The signal receiving module 400 is used to receive a signal sent by the signal relay module 300 which is closest to the signal receiving module 400 , and send the signal to the remote monitoring host 500 .

[0095] For example, Fig.10 As shown, the signal receiving module may include a WiFi bridge, a LoRa bridge, an RS485 to USB converter, a network cable, and a receiving power supply unit. The WiFi bridge is connected to the remote monitoring host in a wired manner via a network cable. The LoRa bridge outputs data via an RS485 (electrical interface specification) interface; the RS485 interface can be converted into a USB (Universal Serial Bus) interface to connect to the remote monitoring host. The receiving power supply unit is used to power the WiFi bridge and the LoRa bridge.

[0096] The remote monitoring host 500 is used to receive the vital sign parameters and abnormal reminder information of the operation object to prompt the monitored object to perform processing.

[0097] The remote monitoring host 500 can obtain data by creating a TCP protocol server and monitoring the specified network cable interface of the signal receiving module 400. The remote monitoring host 500 can also obtain data through the USB interface of the signal receiving module 400. The remote monitoring host 500 can process and display the received vital sign parameters and / or abnormal reminder information of the operating object. Exemplarily, the remote monitoring host can use a fixed terminal or a mobile terminal. Among them, a mobile terminal, such as a laptop, a tablet computer or a mobile phone, can be selected for easy deployment.

[0098] Fig.11 The flowchart of a method for monitoring objects in confined space operations is shown in FIG. Fig.11 The confined space operation object monitoring method shown includes:

[0099] S1110, after being powered on, the information collection and reminder module 100 will automatically perform real-time detection on the vital sign parameters of the working object in the confined space, detect whether there are any abnormalities in the vital sign parameters of the working object, and encapsulate the vital sign parameters and / or abnormal reminder information of the working object in the confined space, and transmit the encapsulated Bluetooth broadcast package to the signal conversion module 200 in the form of Bluetooth signal broadcast.

[0100] S1120, the signal conversion module 200 receives and parses the Bluetooth broadcast packet, and sends the parsed data to the corresponding signal relay module 300 in the form of WiFi signal or LoRa signal for long-distance signal transmission.

[0101] S1130 , using a plurality of signal relay modules 300 connected in series to relay signals, and sending data to the signal receiving module 400 .

[0102] S1140, the signal receiving module 400 transmits the vital sign parameters and / or abnormal warning information of the working object in the confined space to the remote monitoring host through the USB interface or the network cable.

[0103] The technical solution of the embodiment of the utility model is to set up a confined space operation object monitoring system, including: an information collection and reminder module, a signal conversion module, at least one signal relay module, a signal receiving module and a remote monitoring host, wherein the information collection and reminder module is worn on the confined space operation object, the information collection and reminder module is used to collect the vital sign parameters of the operation object, send abnormal reminder information to the operation object, and send the vital sign parameters and abnormal reminder information of the operation object to the monitored object, the information collection and reminder module is communicated with the signal conversion module, the signal conversion module is used to convert the Bluetooth signal sent by the information collection and reminder module, the signal conversion module is communicated with the signal relay module closest to the signal conversion module, the signal relay modules are communicated with each other, the signal relay module is used to relay the signal sent by the signal conversion module, the signal receiving module is communicated with the signal relay module closest to the signal receiving module, and the signal receiving module communicates with the remote monitoring host. The signal receiving module is used to receive the signal sent by the signal relay module closest to the signal receiving module, and send it to the remote monitoring host. The remote monitoring host is used to receive the vital signs parameters and abnormal reminder information of the operating object to prompt the monitored object to process, which solves the problem that the safety of confined space operations is too dependent on manual monitoring and regular reminders of the monitored object. When it is difficult to ensure the real-time and accuracy of manual monitoring of the monitored object, the accuracy of the regular reminders of the monitored object is poor, and it is difficult to ensure the safety of the operating object in the confined space. The real-time monitoring of the operating object by the monitoring object and the operating object at the same time improves the safety of the operating object in the confined space; at the same time, through multiple signal relay modules, multi-level signal relay of the vital signs parameters and abnormal reminder information of the operating object is realized, which ensures the stability of the long-distance transmission of the signal and further ensures the safety of the operating object; in addition, the multi-level signal relay has strong scalability, which improves the practicality of the confined space operation object detection system.

[0104] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0105] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A confined space operation object monitoring system, characterized in that: The system includes: an information collection and reminder module, a signal conversion module, at least one signal relay module, a signal receiving module and a remote monitoring host; The information collection and reminder module is worn on the working object in the confined space; the information collection and reminder module is used to collect the vital signs parameters of the working object, send abnormal reminder information to the working object, and send the vital signs parameters and abnormal reminder information of the working object to the monitored object; The information collection and reminder module is in communication connection with the signal conversion module; the signal conversion module is used to convert the Bluetooth signal sent by the information collection and reminder module; The signal conversion module is communicatively connected to the signal relay module closest to the signal conversion module; each of the signal relay modules is communicatively connected to each other; the signal relay module is used to relay the signal sent by the signal conversion module; The signal receiving module is communicatively connected to the signal relay module closest to the signal receiving module; the signal receiving module is used to receive the signal sent by the signal relay module closest to the signal receiving module, and send it to the remote monitoring host; The signal receiving module is communicatively connected to the remote monitoring host; the remote monitoring host is used to receive the vital sign parameters and abnormal reminder information of the operating object to prompt the monitored object to perform processing.

2. The system according to claim 1, characterized in that The confined space includes a closed space or a semi-closed space with restricted access; the signal relay module is deployed at the passage position for the operating object to enter and exit the confined space.

3. The system according to claim 2, characterized in that The channel position includes the channel corner.

4. The system according to claim 1, characterized in that The information collection and reminder module includes an information collection unit, a reminder unit, a Bluetooth communication unit, a collection control unit and a collection power supply unit; wherein the information collection unit is used to collect the vital signs parameters of the object working in the confined space; the reminder unit is used to remind the working object of abnormal conditions; the Bluetooth communication unit is used to communicate with the signal conversion module; the collection control unit is used to control the data collection, data processing and data transmission of the information collection unit; the collection power supply unit is used to supply power to the information collection unit, the reminder unit, the Bluetooth communication unit and the collection control unit.

5. The system according to claim 4, characterized in that The information collection unit is a heart rate and blood oxygen sensor.

6. The system according to claim 5, characterized in that The information acquisition unit also includes an analog switch; the analog switch is communicatively connected to the heart rate and blood oxygen sensor; the analog switch is communicatively connected to the acquisition control unit; the analog switch is used to control the information acquisition frequency of the heart rate and blood oxygen sensor.

7. The system according to claim 6, characterized in that The information acquisition unit also includes a linear regulator; the linear regulator is electrically connected to the analog switch; the linear regulator is electrically connected to the heart rate and blood oxygen sensor; the linear regulator is used to stabilize the heart rate and blood oxygen sensor.

8. The system according to claim 1, characterized in that The distance between two adjacent signal repeater modules is less than or equal to 50 meters; the distance between the signal relay module and the signal conversion module is less than or equal to 50 meters; the distance between the signal relay module and the signal receiving module is less than or equal to 50 meters.

9. The system according to claim 1, characterized in that The distance between the signal conversion module and the information collection and reminder module is less than or equal to 5 meters.

10. The system according to claim 1, characterized in that The signal conversion module includes a Bluetooth signal receiving unit, a signal conversion control unit, a LoRa signal sending unit and a WiFi signal sending unit; the signal relay module includes a LoRa relay unit and a WiFi relay unit.

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