Equipment status monitoring data collection system based on mobile devices

Abstract

A device status monitoring data collection system based on mobile devices includes a mobile device, a mobile gateway and multiple monitoring devices; each monitoring device detects a device detection point respectively; the monitoring device includes a power supply, a sensor, a data processing module, an MCU and an industrial-grade wireless communication module; the power supply supplies power to the sensor, the data processing module, the MCU and the industrial-grade wireless communication module; the sensor collects the monitoring signal of the monitored device, and after the signal is converted by the data processing module, it is sent out by the IEEE 802.15.4 communication module; the mobile gateway includes a battery, a Bluetooth communication module, an industrial-grade wireless communication module and an MCU; the power supply supplies power to the Bluetooth communication module, the industrial-grade wireless communication module and the MCU; the mobile gateway communicates with the mobile device through Bluetooth communication; the mobile gateway communicates with the monitoring device through the industrial-grade wireless communication module. This system is convenient for collecting status monitoring data.

Description

[0001] This invention application is a divisional application of the invention entitled “A system for collecting equipment status monitoring data via a mobile device” with application number “201811352819.9” and application date “November 14, 2018”. Technical Field

[0002] The present invention belongs to the technical field of industrial site management, and in particular is a system which combines existing mobile applications with Internet of Things applications and collects equipment status monitoring data through mobile devices. Background Art

[0003] Mobile applications have become increasingly popular in the industrial field. The core of mobile applications is that people bring mobile devices to work on-site. They organically combine office work scenes with industrial site work scenes through technologies such as the Internet of Things and mobile front-end and back-end software.

[0004] For equipment status monitoring, whether it is a built-in monitoring device or a post-installed monitoring device, the data is uploaded through a wired industrial bus or a wireless method. The industrial bus requires laying cables and can usually only cover key points. The wireless method requires setting up a gateway, and its deployment difficulty in a metal environment also has many shortcomings. Therefore, there are a large number of monitoring points at industrial sites, and regular measurements are still performed by people holding professional instruments. Summary of the invention

[0005] The technical solution of the present invention is to expand the above mobile devices into mobile gateways for collecting status monitoring data.

[0006] Design idea: This solution is based on the mature Bluetooth technology, wireless transmission technology, and low-power operation design of battery-powered devices. It is a system designed to extend on-site mobile applications and equipment status monitoring applications:

[0007] 1) Design a mobile gateway, one end of which is connected to the mobile device via Bluetooth, and the other end is connected to the status monitoring device via a wireless network (e.g., wireless based on IEEE8-2.15.4 protocol);

[0008] 2) Design a battery-powered adapter with extremely low power consumption to match existing monitoring devices in industrial sites that do not meet wireless requirements, and convert their signals into wireless signals that meet, for example, the IEEE8-2.15.4 protocol.

[0009] 3) Design monitoring equipment with wireless transmission method.

[0010] The technical solution is: a device status monitoring data collection system based on mobile devices, including a mobile device (such as a smart phone or a tablet computer, etc.), a mobile gateway and multiple monitoring devices; each monitoring device detects a device detection point respectively;

[0011] The monitoring device includes a power supply, a sensor, a data processing module, an MCU and an industrial-grade wireless communication module; the power supply supplies power to the sensor, the data processing module, the MCU and the industrial-grade wireless communication module; the sensor collects the monitoring signal of the monitored device, and after the signal is converted by the data processing module, it is sent out by the IEEE8-2.15.4 communication module;

[0012] The mobile gateway includes a battery, a Bluetooth communication module, an industrial-grade wireless communication module and an MCU; the power supply is used to supply power to the Bluetooth communication module, the industrial-grade wireless communication module and the MCU; the mobile gateway communicates with the mobile device via Bluetooth communication; the mobile gateway communicates with the monitoring device via the industrial-grade wireless communication module;

[0013] a. The working process of the monitoring device includes:

[0014] After waking up the monitoring device in sleep state at a scheduled time;

[0015] The data collected by the sensor is stored in the memory; the industrial wireless communication module is turned on to start receiving data from the mobile gateway; if data is received from the mobile gateway, the MCU controls the monitoring device to work according to the instructions of the received data;

[0016] If there is no data from the mobile gateway, the industrial wireless communication module is switched to the transmitting state;

[0017] If the transmission channel is in a busy state, wait for a certain period of time and then detect the idle / busy state of the transmission channel again; until the transmission channel is in an idle state, send the data in the memory to the mobile gateway;

[0018] After the data is sent, the monitoring device returns to sleep mode;

[0019] b. The working process of the mobile gateway includes:

[0020] First determine whether there is a new command;

[0021] If there is a new command, the industrial wireless communication module is switched to the transmitting state and the new command is sent continuously;

[0022] If there is no new command, the industrial wireless communication module is switched to the receiving state; if there is data from the monitoring device, it is received and stored; if there is no data from the monitoring device, it is in the waiting state;

[0023] When the instruction from the mobile device is received through the Bluetooth communication module, the data in the memory is uploaded according to the instruction.

[0024] It also includes one or more network transmission mode adapters, which include an industrial bus data interface module, an MCU, an industrial-grade wireless communication module and a power supply; the power supply supplies power to the industrial bus data interface module, the industrial-grade wireless communication module and the MCU; the data output end of the industrial bus data interface module is connected to the data input end of the MCU, and the data output end of the MCU is connected to the wired data input end of the industrial-grade wireless communication module;

[0025] The working process of the adapter includes:

[0026] After waking up the adapter in sleep mode at a scheduled time;

[0027] The data obtained by the industrial bus data interface module is put into the memory; and the industrial wireless communication module is turned on to start receiving data from the mobile gateway; if data from the mobile gateway is received, the MCU controls the adapter to work according to the instructions of the received data;

[0028] If there is no data from the mobile gateway, the industrial wireless communication module is switched to the transmitting state;

[0029] If the transmission channel is in a busy state, wait for a certain period of time and then detect the idle / busy state of the transmission channel again; until the transmission channel is in an idle state, send the data in the memory to the mobile gateway;

[0030] After the data is sent, the adapter returns to sleep mode.

[0031] The industrial-grade wireless communication module is a communication module based on IEEE 8-2.15.4 or a Zigbee module. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is the principle diagram of this system;

[0033] Figure 2 is a schematic diagram of the principle of the monitoring device / adapter;

[0034] Figure 3 It is a schematic diagram of the principle of the mobile gateway;

[0035] Figure 4 is a schematic diagram of the communication process of the monitoring device / adapter;

[0036] Figure 5 It is a schematic diagram of the communication process of the gateway;

[0037] Figure 6-1 is a schematic diagram of the structure of the monitoring device of Example 1;

[0038] Figure 6-2 is a schematic diagram of the electrical principle of the monitoring device of Example 1;

[0039] In the figure: a housing 101 of the monitoring device of Example 1, a magnetic base 102 of the monitoring device of Example 1, a first column 103, a second column 104, a piezoelectric ceramic vibration sensor 105 of the monitoring device of Example 1, an infrared temperature sensor 106 of the monitoring device of Example 1, a display interface 107 of a segment code LCD display unit, a pressing structure 108 of a power button of the monitoring device of Example 1, and a charging terminal 109 of a power supply of the monitoring device of Example 1;

[0040] Figure 7-1 is a schematic diagram of the structure of the monitoring device of Example 2;

[0041] Figure 7-2 is a schematic diagram of the electrical principle of the monitoring device of Example 2;

[0042] In the figure: a housing 201 of the monitoring device of Example 2, a magnetic base 202 of the monitoring device of Example 2, a main PCB board 203, an auxiliary PCB board 204, a piezoelectric ceramic vibration sensor 205 of the monitoring device of Example 2, a MEMs sensor 206, a temperature sensor 207, a battery 208 of the monitoring device of Example 2, and an antenna 209 of a ZigBee communication module;

[0043] Figure 8-1 is a schematic diagram of the structure of the monitoring device of Example 3;

[0044] Figure 8-2 is a schematic diagram of a radial cross section of an RFID tag and a sealing layer;

[0045] In the figure: a main body 301 of the monitoring device of Example 3, a base 302 of the monitoring device of Example 3, an RFID tag 303, an antenna 304 of an RFID card reader circuit, a first through hole 305, a convex column 306, a sealing material 307, a metal sheet 308, and an annular recess 309;

[0046] Fig. 9 It is a schematic diagram of the connection structure between the main magnet and the sub-magnet;

[0047] Fig.10 Schematic diagram of the structure of the second notch (the principle of the first notch is the same as that of the second notch);

[0048] In the figure: main magnet 10, sub-magnet 11, pressure plate 12, connecting rod 13, first notch 14, second notch 15, ball 16, groove 17. DETAILED DESCRIPTION

[0049] The present invention is further described below with reference to the accompanying drawings and specific implementation methods:

[0050] like Figures 1 to 5 , a device status monitoring data collection system based on mobile devices, including a mobile device (such as a smart phone or a tablet computer, etc.), a mobile gateway and a plurality of monitoring devices; each monitoring device detects a device detection point respectively;

[0051] The monitoring device includes a power supply, a sensor, a data processing module, an MCU and an industrial-grade wireless communication module; the power supply supplies power to the sensor, the data processing module, the MCU and the industrial-grade wireless communication module; the sensor collects the monitoring signal of the monitored device, and after the signal is converted by the data processing module, it is sent out by the IEEE8-2.15.4 communication module;

[0052] The mobile gateway includes a battery, a Bluetooth communication module, an industrial-grade wireless communication module and an MCU; the power supply is used to supply power to the Bluetooth communication module, the industrial-grade wireless communication module and the MCU; the mobile gateway communicates with the mobile device via Bluetooth communication; the mobile gateway communicates with the monitoring device via the industrial-grade wireless communication module;

[0053] a. The communication process of the monitoring device includes:

[0054] After waking up the monitoring device in sleep state at a scheduled time;

[0055] The data collected by the sensor is stored in the memory; the industrial wireless communication module is turned on to start receiving data from the mobile gateway; if data is received from the mobile gateway, the MCU controls the monitoring device to work according to the instructions of the received data;

[0056] If there is no data from the mobile gateway, the industrial wireless communication module is switched to the transmitting state;

[0057] If the transmission channel is in a busy state, wait for a certain period of time and then detect the idle / busy state of the transmission channel again; until the transmission channel is in an idle state, send the data in the memory to the mobile gateway;

[0058] After the data is sent, the monitoring device returns to sleep mode;

[0059] b. The working process of the mobile gateway includes:

[0060] First determine whether there is a new command;

[0061] If there is a new command, the industrial wireless communication module is switched to the transmitting state and the new command is sent continuously;

[0062] If there is no new command, the industrial wireless communication module is switched to the receiving state; if there is data from the monitoring device, it is received and stored; if there is no data from the monitoring device, it is in the waiting state;

[0063] When the instruction from the mobile device is received through the Bluetooth communication module, the data in the memory is uploaded according to the instruction.

[0064] It also includes one or more network transmission mode adapters, which include an industrial bus data interface module, an MCU, an industrial-grade wireless communication module and a power supply; the power supply supplies power to the industrial bus data interface module, the industrial-grade wireless communication module and the MCU; the data output end of the industrial bus data interface module is connected to the data input end of the MCU, and the data output end of the MCU is connected to the wired data input end of the industrial-grade wireless communication module;

[0065] The working process of the adapter includes:

[0066] After waking up the adapter in sleep mode at a scheduled time;

[0067] The data obtained by the industrial bus data interface module is put into the memory; and the industrial wireless communication module is turned on to start receiving data from the mobile gateway; if data from the mobile gateway is received, the MCU controls the adapter to work according to the instructions of the received data;

[0068] If there is no data from the mobile gateway, the industrial wireless communication module is switched to the transmitting state;

[0069] If the transmission channel is in a busy state, wait for a certain period of time and then detect the idle / busy state of the transmission channel again; until the transmission channel is in an idle state, send the data in the memory to the mobile gateway;

[0070] After the data is sent, the adapter returns to sleep mode.

[0071] The industrial-grade wireless communication module is a communication module based on IEEE 8-2.15.4 or a Zigbee module.

[0072] 1. The present invention realizes the composition principle as follows Figure 1 :

[0073] √ Monitoring device management software for mobile devices: used to manage and collect monitoring devices in the system;

[0074] √Gateway: wireless conversion;

[0075] √ Monitoring device or adapter: collect data and upload it;

[0076] In terms of technical implementation, there are several key technical points that directly affect whether this method has achievable value:

[0077] √ Many-to-many situation: In the same area, there are multiple mobile devices corresponding to multiple monitoring devices;

[0078] √ Extremely low power consumption requirement for monitoring devices: The purpose of wireless is to reduce wiring and reduce deployment difficulty, so they are basically powered by batteries. Therefore, working time becomes an extremely important indicator, usually measured in years;

[0079] 2. Detection device / adapter (such as Figure 2 )

[0080] The data collected by the monitoring device is converted into digital form (or the adapter obtains data from an existing monitoring device that does not meet the wireless requirements through industrial bus data), and then sent to the MCU for processing. The result data is then uploaded to the gateway and transferred to the mobile device through the gateway.

[0081] When implementing the project, the device needs to be a low-power device, such as a low static current, and the MCU has an embedded clock, which can wake up at regular intervals and has low power consumption requirements during sleep; all of which must be at a few microamperes or lower.

[0082] In terms of working mode, periodic work is adopted, but personnel are required to collect data without feeling. Therefore, the selection of working cycle has a compromise relationship with human walking speed, wireless transmission distance, working time, etc.:

[0083] The average walking speed of a person is about 1m / s. The wireless transmission distance is calculated based on a minimum radius of 10 meters. The intersection with people is at least 10s. The measurement and transmission of a total value can generally be completed in 10ms. The battery capacity is calculated based on 1000mAh, the working current is calculated based on 20mA, and the duty cycle is 10mA / 10s. After conversion, the theoretical working time is: 5 years.

[0084] In terms of time, battery capacity, amount of data transmitted, and sudden interference all have an impact on the results, but if it is guaranteed to last for 1 year, there will basically be no problem;

[0085] The protocol of the monitoring device / adapter is as follows Figure 4 , monitoring device / adapter logic is on a first-come, first-served basis.

[0086] 3. Mobile gateway, such as Figure 3 .

[0087] The wireless gateway can use rechargeable batteries, so in terms of power consumption, it can be designed with reference to portable devices. The Bluetooth protocol is point-to-point, and once bound to a mobile device, it will be more stable.

[0088] Gateway protocols such as Figure 5 , which is in the accepting state by default. When a new command is to be given, a 10-second non-detection broadcast is used.

[0089] In this example, the monitoring device has the following three implementation methods to solve different specific technical problems.

[0090] Method 1 (such as Figure 6-1 , 6-2 , 9, 10), comprising a housing, a piezoelectric ceramic vibration sensor, an infrared temperature sensor, a data processing circuit, a human-computer interaction unit and a power supply; the power supply is used to power the piezoelectric ceramic vibration sensor, the infrared temperature sensor, the data processing circuit and the human-computer interaction unit;

[0091] The shell is composed of two left and right hollow cylinders connected, and the axes of the two cylinders are perpendicular to the horizontal plane;

[0092] The bottom surface of the first column is connected to a magnetic seat composed of a magnet; the probe of the piezoelectric ceramic vibration sensor is fixedly connected to the bottom surface of the first column;

[0093] The bottom surface of the second column is higher than the bottom surface of the first column; the probe of the infrared temperature sensor extends out of the bottom surface of the second column and faces downward;

[0094] The output ends of the piezoelectric ceramic vibration sensor and the infrared temperature sensor are both connected to the data input end of the data processing circuit; the data output end of the data processing circuit is connected to the data input end of the MCU, and the data output end of the MCU is connected to the data input end of the human-computer interaction unit.

[0095] Furthermore, the data processing circuit is an analog-to-digital conversion circuit; the output ends of the piezoelectric ceramic vibration sensor and the infrared temperature sensor are connected to the input end of the analog-to-digital conversion circuit, connected to the data input end of the MCU, and the data output end of the MCU is connected to the data input end of the data input end of the human-computer interaction unit (such as a segment code LCD display unit).

[0096] Since the sensor collects analog quantities, it is converted into digital quantities through the analog-to-digital conversion circuit and sent to the subsequent units. Here, the accuracy requirement of the analog-to-digital conversion is not high, and 16 bits can be used.

[0097] The principle of this scheme is to adsorb the whole device to the corresponding position of the equipment through the magnetic seat. The rigid connection between the probe of the piezoelectric ceramic vibration sensor and the structural part senses the vibration transmitted by the equipment and converts it into an electrical signal. At the same time, the probe of the infrared temperature sensor detects the temperature of the measured position in a non-contact manner. Two types of indicators are monitored on one device. The data processing circuit converts the electrical signals of vibration and temperature measurement into digital signals to the MCU and even the human-computer interaction unit.

[0098] Furthermore, a Bluetooth transmitting unit may be included, and the data input terminal of the Bluetooth transmitting unit is also connected to the data output terminal of the MCU. The vibration and temperature measurement information may also be sent out (directly to the mobile device) through the Bluetooth transmitting unit, so that other devices with Bluetooth communication can receive the data and further collect and process it.

[0099] Furthermore, the power source is a rechargeable power source; the power source is inside the housing, and the charging terminals of the power source are exposed on the housing surface. Since the working energy consumption of the device is very low, and the main energy consumption is the communication unit and the display unit, a mature rechargeable power source can be used, and the life of the rechargeable power source is not required to be high, and the maintenance is simple, and only charging is required at the terminals without disassembling the battery.

[0100] Since the result data displayed by the device is relatively simple, the existing segment code LCD display unit can meet the requirements. At the same time, the segment code LCD display unit has a small size and low power consumption, and is very suitable.

[0101] The utility model also comprises a power button, which is connected in series with the output end of the power supply, and the pressing structure of the power button is exposed on the surface of the shell.

[0102] Furthermore, the magnetic seat includes a main magnet and a sub-magnet; the main magnet is in the shape of a disk and is directly below the probe of the piezoelectric ceramic vibration sensor;

[0103] There are a plurality of sub-magnets, which are rotatably connected to the periphery of the main magnet and are symmetrical around the axis of the main magnet.

[0104] Furthermore, the connection structure between the main magnet and the sub-magnet is as follows: it includes a pressure plate and a connecting rod; a first notch in the shape of a spherical crown with an opening facing upward is opened on the edge of the pressure plate, and a groove is opened on the wall of the first notch; a second notch in the shape of a spherical crown with an opening facing downward is opened on the edge of the sub-magnet, and a groove is opened on the wall of the second notch; the head end of the connecting rod is respectively connected to balls corresponding to the shapes of the first and second notches, and the front and rear of the connecting rod are respectively in the grooves of the pressure plate and the sub-magnet; the two balls are respectively in the first and second notches.

[0105] Since the device used in this example may have an uneven curved surface, a plurality of sub-magnets are used to attract the vicinity of the monitoring position, and a connecting rod is used to hold the main magnet to make the device more stable.

[0106] The device in this example uses a compact structure to integrate Bluetooth transmission, piezoelectric vibration measurement, infrared non-contact temperature monitoring, segment code display, etc. into a very small structure, so that the device can be used independently as a monitoring tool in existing factory management in a simple and flexible manner.

[0107] Method 2 (such as Figure 7-1 , 7-2 , 9, 10), comprising a housing, a piezoelectric ceramic vibration sensor for high-frequency monitoring, a MEMs sensor for low-frequency monitoring, a temperature sensor and a data processing circuit; a power supply is used to supply power to the piezoelectric ceramic vibration sensor, the MEMs sensor, the temperature sensor and the data processing circuit; the power supply, the piezoelectric ceramic vibration sensor, the MEMs sensor, the temperature sensor, the data processing circuit, the MCU and the industrial-grade wireless communication module are all connected on a PCB board;

[0108] The shell is a hollow cylinder, and the bottom of the cylinder is open, and a base is fixed to the open bottom; the piezoelectric ceramic vibration sensor, MEMs sensor, temperature sensor, data processing circuit, industrial-grade wireless communication module, MCU and PCB board are all fixed in the hollow of the cylinder;

[0109] The base is made of a hard heat-conducting material; the probe of the temperature sensor is closely attached to the base; the probe of the piezoelectric ceramic vibration sensor is closely attached to the base;

[0110] The output ends of the piezoelectric ceramic vibration sensor, MEMs sensor and infrared temperature sensor are all connected to the data input end of the data processing circuit; the data output end of the data processing circuit is connected to the data input end of the MCU, and the data output end of the MCU is connected to the data input end of the industrial-grade wireless communication module.

[0111] Furthermore, the communication circuit is a ZigBee communication module; the antenna of the ZigBee communication module is connected to the outer wall of the shell, and the antenna and the connection terminal of the ZigBee communication module are connected through a waveguide.

[0112] Furthermore, the power source is a battery.

[0113] Furthermore, the PCB board includes a main PCB board and an auxiliary PCB board, and the two PCB boards are electrically connected; the main PCB board is on the top and the auxiliary PCB board is on the bottom;

[0114] The main body of the piezoelectric ceramic vibration sensor is welded on the bottom surface of the main PCB board, the main body of the electric ceramic vibration sensor passes through the through hole in the center of the auxiliary PCB board from top to bottom, and the probe of the electric ceramic vibration sensor is closely attached to the top surface of the base; the battery is connected to the top surface of the main PCB board; the industrial-grade wireless communication module and MCU are connected to the main PCB board;

[0115] The MEMs sensor is soldered on the top surface of the auxiliary PCB;

[0116] The temperature sensor is welded on the bottom surface of the auxiliary PCB board, and the temperature sensor is sandwiched between the bottom surface of the auxiliary PCB board and the top surface of the base, and the probe of the temperature sensor is closely attached to the top surface of the base.

[0117] Furthermore, the base is a magnetic seat composed of a magnet.

[0118] Furthermore, the data processing circuit is an analog-to-digital conversion circuit; the analog-to-digital conversion circuit also has an enabling circuit;

[0119] The trigger signal output terminal of the MEMs sensor is connected to the trigger signal input terminal of the enabling circuit;

[0120] The output ends of the piezoelectric ceramic vibration sensor and the temperature sensor are connected to the input end of the analog-to-digital conversion circuit;

[0121] The output end of the analog-to-digital conversion circuit is connected to the data input end of the communication circuit; the digital signal output end of the MEMs sensor is connected to the data input end of the communication circuit.

[0122] Since the sensor collects analog quantities, it is converted into digital quantities through the analog-to-digital conversion circuit and sent to the subsequent units. Here, the accuracy requirement of the analog-to-digital conversion is not high, and 16 bits can be used.

[0123] In order to reduce costs by using existing components, the function of the data processing circuit here can be realized by MCU during engineering implementation. The signal input end of MCU (if it does not have A / D conversion function, an A / D converter is added in front of the corresponding input port) is connected to the output ends of the three sensors. One input end of MCU is connected to the trigger signal output end of MEMs sensor. The data output by MCU is transmitted through ZigBee communication module.

[0124] The principle of this example is to install (adsorb) the entire device at the corresponding position of the equipment through the base (magnetic base). The piezoelectric ceramic vibration sensor probe is rigidly connected to the structural part to sense the high-frequency vibration transmitted from the equipment and convert it into an electrical signal; the MEMs sensor senses the low-frequency vibration transmitted from the equipment and converts it into an electrical signal; the temperature sensor probe detects the temperature of the measured position transmitted from the base and converts it into an electrical signal; the data processing circuit converts the electrical signals of high / low-frequency vibration and temperature measurement into digital signals for the communication module. Here, the MEMs sensor, based on its own functional / performance characteristics, can trigger the overall operation of this monitoring device in addition to high-density continuous low-frequency monitoring.

[0125] Furthermore, the power source is a rechargeable power source. Due to the low power consumption characteristics and triggering specificity of the MEMs of this device, when the whole device (intermittent working device) is in a non-working state, the device is also basically in a non-working state, and the working energy consumption is very low.

[0126] The device can use a mature rechargeable power source, does not require a high life span of the rechargeable power source, and is easy to maintain.

[0127] Furthermore, the magnetic seat includes a main magnet and a sub-magnet; the main magnet is in the shape of a disk and is directly below the probe of the piezoelectric ceramic vibration sensor;

[0128] There are a plurality of sub-magnets, which are rotatably connected to the periphery of the main magnet and are symmetrical around the axis of the main magnet.

[0129] Furthermore, the connection structure between the main magnet and the sub-magnet is as follows: it includes a pressure plate and a connecting rod; a first notch in the shape of a spherical crown with an opening facing upward is opened on the edge of the pressure plate, and a groove is opened on the wall of the first notch; a second notch in the shape of a spherical crown with an opening facing downward is opened on the edge of the sub-magnet, and a groove is opened on the wall of the second notch; the head end of the connecting rod is respectively connected to balls corresponding to the shapes of the first and second notches, and the front and rear of the connecting rod are respectively in the grooves of the pressure plate and the sub-magnet; the two balls are respectively in the first and second notches.

[0130] Since the device used in this example may have an uneven curved surface, multiple sub-magnets are used to attract the monitoring position and a connecting rod is used to pull the main magnet to make the device in this example more stable. The device in this example is small in size and has diverse monitoring data, which can better extract impact signals.

[0131] Method 3 (such as Figure 8-1 , 8-2 , 9, 10), comprising a base and a main body, the base being connected to the bottom of the main body, the main body being equipped with a sensor and an industrial-grade wireless communication module; the data of the sensor is transmitted to the MCU, and then transmitted to the industrial-grade wireless communication module by the MCU; and also comprising an RFID system, the RFID tag of the RFID system being installed on the base, and the RFID card reader circuit of the RFID system being installed on the main body; the main body and the base being detachably connected; the data of the RFID card reader circuit is transmitted to the MCU, and then transmitted to the industrial-grade wireless communication module by the MCU;

[0132] A first through hole is opened at the center of the base; the RFID tag is covered with a sealing layer, and the bottom surface of the sealing layer is connected to the top surface of the base; a second through hole is opened on the sealing layer, and the position of the second through hole corresponds to the central position of the coil of the RFID tag;

[0133] A downward convex column is provided at the middle of the bottom of the main shell body, and the convex column is detachably connected to the inner cavity of the first through hole; the antenna of the RFID card reader circuit is located at the bottom of the shell body, and the antenna surrounds the convex column in a ring shape.

[0134] The principle of this device is to connect the main body to the base, and the base is fixed to the monitored device. When working, the RFID card reader circuit transmits radio wave energy of a specific frequency to the RFID tag, driving the RFID tag to send its ID Code. At this time, the RFID card reader circuit receives this ID Code and sends it to the upper monitoring network through the communication circuit. At this time, even if the main body is replaced, it will not affect the monitoring network's recognition of the monitored device.

[0135] Furthermore, in the axial section, the structure of the RFID tag and the sealing layer is:

[0136] The label layer is formed by wrapping the RFID tag with a sealing material; the metal layer is formed by wrapping a metal sheet with a sealing material, in which a gap is left between the top of the metal sheet and the sealing material; and the label layer is connected to the top of the metal layer.

[0137] Furthermore, the sealing material is a soft glue (such as rubber or silicone).

[0138] Furthermore, the coil of the RFID tag is in a ring shape; the antenna of the RFID reader circuit is in a ring shape;

[0139] The convex column is in the shape of a cylinder and is located in the hollow of the ring-shaped antenna; the bottom surface of the shell of the main body is circular;

[0140] A downward annular concave is provided on the top surface of the base, and the RFID tag and the sealing layer are embedded in the annular concave; when the main body is connected to the base, the antenna of the RFID card reader circuit is in the annular concave.

[0141] Furthermore, the outer wall of the boss is provided with an external thread, and the inner wall of the first through hole is provided with a corresponding internal thread.

[0142] Furthermore, the boss is hollow, and the material of the boss is hard and heat conductive;

[0143] The sensor comprises a piezoelectric ceramic vibration sensor and a temperature sensor; the probe of the piezoelectric ceramic vibration sensor is fixed in the hollow of the convex column; the probe of the temperature sensor is attached to the bottom surface of the hollow of the convex column.

[0144] The height of the boss corresponds to the depth of the first through hole, and when the main body is connected to the base, the bottom surface of the boss is flush with the bottom surface of the first through hole.

[0145] Furthermore, the base is a magnetic seat composed of magnets;

[0146] The magnetic seat includes a main magnet and a sub-magnet; the first through hole is located at the center of the main magnet; there are multiple sub-magnets, which are rotatably connected to the periphery of the main magnet and are symmetrical around the axis of the main magnet;

[0147] The connection structure between the main magnet and the sub-magnet is as follows: it includes a pressure plate and a connecting rod; the pressure plate is in the shape of a circular ring, and is pressed on the outer edge of the top surface of the main magnet;

[0148] A first notch in the shape of a spherical crown with an opening facing upward is provided on the edge of the pressure plate, and a groove is provided on the wall of the first notch; a second notch in the shape of a spherical crown with an opening facing downward is provided on the edge of the sub-magnet, and a groove is provided on the wall of the second notch; balls corresponding to the shapes of the first and second notches are connected to the head ends of the connecting rod, respectively, and the front and rear ends of the connecting rod are respectively in the grooves of the pressure plate and the sub-magnet; the two balls are respectively in the first and second notches.

[0149] Furthermore, a protrusion for welding is connected to the base.

[0150] The main considerations for adopting the above structural design are: due to the harsh environment such as temperature and vibration at the use site, the device must have high reliability.

[0151] This solution uses mature RFID tag technology. There is a metal layer under the RFID tag, which serves as a signal reflection layer, reducing the impact of metal in the use environment on the tag. The tag is wrapped with a soft rubber sealing layer to reduce the impact of high temperature, vibration and impact of the monitored equipment on the tag. The circular alignment design of the RFID tag and the base ensures that there is no problem with the antenna alignment direction when the sensor is installed on the smart seat; for welding requirements, welding ears can be added on both sides of the circular smart seat.

[0152] At the same time, the data sent to the outside by RFID tag technology is relatively simple, which is only the ID code. The data information of the ID code is used as a data input of the communication circuit, and the RFID card reader circuit is connected to the power supply. For engineers, this can be completed according to the manual or demo of the RFID system. The existing circuits such as sensors and communication circuits do not need to be modified in principle.

[0153] When the device is in use, as long as the base is bound to the equipment monitoring point, even if the sensor part is moved or replaced, the control end of the monitoring network can automatically identify and update it.

Claims

1. A device status monitoring data collection system based on mobile devices, characterized in that It includes a mobile device, a mobile gateway and a plurality of monitoring devices; each monitoring device detects a device detection point respectively; a. The monitoring device includes a first power supply, a first sensor, a first data processing module, a first MCU, a first industrial-grade wireless communication module, a housing, a first piezoelectric ceramic vibration sensor, a first infrared temperature measurement sensor, a human-computer interaction unit and a Bluetooth transmitting unit; The first power supply supplies power to the first sensor, the first data processing module, the first MCU and the first industrial-grade wireless communication module; The shell is composed of two left and right hollow cylinders connected, and the axes of the two cylinders are perpendicular to the horizontal plane; The bottom surface of the first column is connected to a magnetic seat composed of a magnet; the probe of the piezoelectric ceramic vibration first sensor is fixedly connected to the bottom surface of the first column; The bottom surface of the second column is higher than the bottom surface of the first column; the probe of the first infrared temperature measurement sensor extends out of the bottom surface of the second column and faces downward; The output ends of the first piezoelectric ceramic vibration sensor and the first infrared temperature measurement sensor are both connected to the data input end of the first data processing module; the data output end of the first data processing module is connected to the data input end of the first MCU, and the data output end of the first MCU is connected to the data input end of the human-computer interaction unit; The data input terminal of the Bluetooth transmitting unit is also connected to the data output terminal of the first MCU; The first sensor collects the monitoring signal of the monitored device, converts the signal through the first data processing module, and then sends it out through the first industrial-grade wireless communication module; The communication process of the monitoring device includes: After waking up the monitoring device in sleep state at a scheduled time; The data collected by the first sensor is stored in the memory; and the first industrial-grade wireless communication module is turned on to start receiving data from the mobile gateway; if data from the mobile gateway is received, the first MCU controls the monitoring device to work according to the instruction of the received data; If there is no data from the mobile gateway, switching the first industrial wireless communication module to a transmitting state; If the transmission channel is in a busy state, wait for a certain period of time and then detect the idle / busy state of the transmission channel again; until the transmission channel is in an idle state, send the data in the memory to the mobile gateway; After the data is sent, the monitoring device returns to sleep mode; b. The mobile gateway includes a second power supply, a Bluetooth communication module, a second industrial-grade wireless communication module and a second MCU; the second power supply supplies power to the Bluetooth communication module, the second industrial-grade wireless communication module and the second MCU; the mobile gateway communicates with the mobile device via Bluetooth communication; the mobile gateway communicates with the monitoring device via the second industrial-grade wireless communication module; The communication process of the mobile gateway includes: First determine whether there is a new command; If there is a new command, the second industrial-grade wireless communication module is switched to the transmitting state to continuously send the new command; If there is no new command, the second industrial wireless communication module is switched to a receiving state; if there is data from the monitoring device, it is received and stored; if there is no data from the monitoring device, it is in a waiting state; When the instruction from the mobile device is received through the Bluetooth communication module, the data in the memory is uploaded according to the instruction.

2. The system according to claim 1, characterized in that It also includes a network transmission mode adapter, which includes an industrial bus data interface module, a third MCU, a third industrial-grade wireless communication module and a third power supply; the third power supply supplies power to the industrial bus data interface module, the third industrial-grade wireless communication module and the third MCU; the data output end of the industrial bus data interface module is connected to the data input end of the third MCU, and the data output end of the third MCU is connected to the wired data input end of the third industrial-grade wireless communication module; The communication process of the adapter includes: After waking up the adapter in sleep mode at a scheduled time; The data obtained by the industrial bus data interface module is put into the memory; and the third industrial wireless communication module is turned on to start receiving data from the mobile gateway; if data from the mobile gateway is received, the third MCU controls the adapter to work according to the instruction of the received data; If there is no data from the mobile gateway, the third industrial-grade wireless communication module is switched to a transmitting state; If the transmission channel is in a busy state, wait for a certain period of time and then detect the idle / busy state of the transmission channel again; until the transmission channel is in an idle state, send the data in the memory to the mobile gateway; After the data is sent, the adapter returns to sleep mode.

3. The system according to claim 1, characterized in that The first industrial-grade wireless communication module and the second industrial-grade wireless communication module are communication modules based on IEEE 802.15.4 or Zigbee modules.

4. The system according to claim 1, characterized in that The magnetic seat includes a main magnet and a sub-magnet; the main magnet is in the shape of a disk and is located directly below the probe of the piezoelectric ceramic vibration sensor; There are a plurality of sub-magnets, which are rotatably connected to the periphery of the main magnet and are symmetrical around the axis of the main magnet; Furthermore, the connection structure between the main magnet and the sub-magnet is as follows: it includes a pressure plate and a connecting rod; a first notch in the shape of a spherical crown with an opening facing upward is opened on the edge of the pressure plate, and a groove is opened on the wall of the first notch; a second notch in the shape of a spherical crown with an opening facing downward is opened on the edge of the sub-magnet, and a groove is opened on the wall of the second notch; the head end of the connecting rod is respectively connected to balls corresponding to the shapes of the first and second notches, and the front and rear of the connecting rod are respectively in the grooves of the pressure plate and the sub-magnet; the two balls are respectively in the first and second notches.

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