Integrated helicopter vibration detection device and detection method thereof

Abstract

The invention discloses an integrated helicopter vibration detection device and a detection method thereof.The vibration detection device comprises an installation body, a flexible mainboard, a battery and a data receiving and transmitting antenna, the flexible mainboard is installed in an installation cavity in a bent mode and encapsulated by an insulating material, and a vibration sensor and a wireless chip are integrated on the flexible mainboard; the battery is installed in the installation cavity and surrounded by the flexible mainboard, and the wireless chip carries out data wireless transmission to the host through the data receiving and transmitting antenna. The built-in battery of the vibration detection device provided by the invention supports the electric energy of the vibration detection device, supports wireless data transmission, has no external cable, reduces the wiring difficulty, places the flexible mainboard in the mounting cavity of the mounting main body in a bent form, and fully utilizes the middle space of the flexible mainboard to mount the battery, thereby improving the space utilization rate, and improving the reliability of the vibration detection device. The sensor has the characteristics of small size and high integration level, is more convenient to install and deploy compared with a traditional wired sensor, and solves the inconvenience caused by cables.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration sensors, and in particular to an integrated helicopter vibration detection device and a detection method thereof. Background Art

[0002] Civilian and military helicopters require regular maintenance and inspection, and helicopter rotor vibration and dynamic balance are very important detection links. If the rotor dynamic balance is not properly debugged, it will reduce the comfort of pilots and passengers at the least, and increase the stress on related parts of the fuselage, thereby accelerating wear and reducing life. In severe cases, it may even cause a crash. Therefore, reliable equipment and means are needed to accurately detect the vibration and dynamic balance of helicopter rotors. Summary of the invention

[0003] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0004] The traditional maintenance and maintenance monitoring solution is to use Honeywell's Vibrex2000, ACES2020HR and other equipment to monitor helicopter vibration and balance the rotor. During measurement, the main device is connected to the vibration sensor through a customized long wire to obtain the vibration value analog value at the installation position of the vibration sensor. The vibration sensor is generally installed near the main rotor bearing, near the tail rotor bearing, and near the engine. At the same time, a photoelectric or electromagnetic speed sensor is installed near the rotor to obtain the speed and phase relationship, and the speed pulse signal is transmitted to the main device using a cable. The main device calculates the vibration and speed values, obtains the maximum amplitude and azimuth angle of the vibration at that location, spectrum and other information, and finally calculates the azimuth and weight required for balancing in combination with the dynamic balance weight query table provided by the helicopter manufacturer. The maintenance personnel install the required balancing parts at the specified position of the rotor, and then perform vibration monitoring, calculation, and balancing, and repeat this process until the vibration value reaches an acceptable range (generally less than 0.2IPS (Inch per second)).

[0005] The above equipment and operations have the following main problems: 1. The cable lengths are different and are not compatible with various models of different sizes; 2. The cables need to be firmly fixed, otherwise it is easy to cause safety hazards; 3. The cables are easily damaged, resulting in abnormal and unpredictable measurement results. The sensor connectors are easily damaged and contaminated, resulting in abnormal analog signal transmission; 4. The cables transmit analog signals over long distances, and the signals are easily interfered with, resulting in a decrease in the signal-to-noise ratio and easy to cause false detection, especially when the signal amplitude is small when the balance is close to the acceptable range; 5. The vibration sensor is large in size, which limits its installation on the helicopter, and poor installation angles will lead to measurement errors.

[0006] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides an integrated helicopter vibration detection device.

[0007] The embodiment of the present invention further provides a detection method based on the above-mentioned integrated helicopter vibration detection device.

[0008] The integrated helicopter vibration detection device of the embodiment of the present invention includes: an installation body, an installation cavity is defined in the installation body; a flexible mainboard, the flexible mainboard is bently installed in the installation cavity and is encapsulated by an insulating material, a vibration sensor and a wireless chip are integrated on the flexible mainboard, the vibration sensor is connected to the wireless chip signal to transmit a vibration detection signal to the wireless chip, and the wireless chip is used to transmit data and receive control signals sent by a host; a battery, the battery is installed in the installation cavity and surrounded by the flexible mainboard, the battery is electrically connected to the flexible mainboard to provide the electric energy required for its operation; a data transceiver antenna, the data transceiver antenna is connected to the installation body, and the wireless chip wirelessly transmits data to the host through the data transceiver antenna.

[0009] In some embodiments, the flexible main board is unfolded into a rectangular plate; and / or the bending radius of the flexible main board is 3mm-10mm, and / or the wrapping central angle of the flexible main board is greater than or equal to 270 degrees.

[0010] In some embodiments, a plurality of hollow holes are arranged on the flexible main board, and the hollow holes are filled with the insulating material.

[0011] In some embodiments, the wireless chip includes a Bluetooth module, a wireless transmission module and a data storage module. The data storage module is used to store the vibration data detected by the vibration sensor, the Bluetooth module is used to pair with the host and receive control signals, and the wireless transmission module is used to transmit the data stored in the data storage module to the host through the data transceiver antenna.

[0012] In some embodiments, the vibration detection device also includes a wireless charging antenna, and a charging management module and a wireless charging circuit are integrated on the flexible main board. The charging management module is used to manage and protect the charging and discharging of the battery. The wireless charging circuit receives the wireless energy sent by the external charging module through the wireless charging cable, and converts the wireless energy into voltage to charge the battery through the charging management module.

[0013] In some embodiments, the vibration detection device includes an antenna board, which includes a substrate and the data transceiver antenna and the wireless charging antenna welded on the substrate. The antenna board also includes a magnet arranged on the substrate, and the magnet is used for magnetically docking with an external charging module.

[0014] In some embodiments, the installation body includes an outer shell and a back cover, the back cover is detachably connected to the outer shell to define the installation cavity, the outer shell is provided with a notch, the antenna board is arranged at the notch, and the installation cavity and the notch are filled with silicone to fix the relative positions of the flexible main board, the battery and the antenna board.

[0015] In some embodiments, the mounting body includes an outer shell and a back cover, the back cover is detachably connected to the outer shell to define the mounting cavity, the outer shell is a cylindrical metal shell, a portion of the outer circumferential surface of the outer shell forms a mounting plane, and the mounting plane is orthogonal to one of the sensitive axes of the vibration sensor.

[0016] In some embodiments, the shell is a cylindrical metal shell having an open first end and a closed second end in its radial direction, the back cover covers the first end of the shell, and a portion of the outer circumference of the shell forms a mounting plane, which is orthogonal to one of the sensitive axes of the vibration sensor.

[0017] In some embodiments, the vibration sensor is a three-axis vibration sensor having sensitive axes in three directions.

[0018] Another aspect of the present invention provides a detection method of a vibration detection device, including:

[0019] Pairing the host with the vibration detection device via Bluetooth and establishing a data connection;

[0020] Installing the vibration detection device to the vibration part of the helicopter to be tested;

[0021] The host sends a control signal to the vibration detection device to control the vibration detection device to start;

[0022] Starting the helicopter, and the vibration detection device collecting vibration data;

[0023] When the preset speed is reached and the preset time has passed, the helicopter stops running, and the host sends a control signal to the vibration detection device to control the vibration detection device to stop collecting data;

[0024] The host sends a control signal to the vibration detection device to control the vibration detection device to wirelessly transmit the collected data to the host.

[0025] The embodiment of the present invention provides an integrated helicopter vibration detection device and a detection method thereof. The vibration detection device has a built-in battery to support its own power needs, and supports wireless data transmission, and realizes wireless data interaction with a host. There is no external cable, which reduces the difficulty of wiring, avoids the impact of cable performance degradation and damage, and avoids the inconvenience caused by abnormal cable interfaces. In addition, the flexible mainboard is placed in the installation cavity of the installation body in a bent form, and the middle space of the flexible mainboard is fully utilized to install the battery, which improves the space utilization rate, so that the vibration detection device provided by the embodiment of the present invention has the characteristics of small size and high integration. Compared with traditional wired sensors, it is more convenient to install and deploy, and solves many inconveniences caused by cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the appearance of an integrated helicopter vibration detection device provided by an embodiment of the present invention; Figure 2 is a cross-sectional view of an integrated helicopter vibration detection device provided by an embodiment of the present invention;

[0027] Figure 3 is a schematic structural diagram of a housing provided by an embodiment of the present invention;

[0028] Figure 4 is a schematic structural diagram of a back cover provided by an embodiment of the present invention;

[0029] Figure 5 is a bending diagram of a flexible mainboard provided by an embodiment of the present invention;

[0030] Figure 6 is an expanded view of a flexible mainboard provided by an embodiment of the present invention;

[0031] Figure 7 is a schematic structural diagram of an antenna board provided by an embodiment of the present invention;

[0032] Figure 8 It is a flow chart of a detection method of a vibration detection device provided by an embodiment of the present invention.

[0033] Reference numerals:

[0034] Vibration detection device 100, installation body 110, installation cavity 111, silica gel 112, shell 113, installation plane 1131, ribbon 1132, back cover 114, notch 115, flexible main board 120, vibration sensor 121, wireless chip 122, insulating material 123, hollow hole 124, battery 130, antenna board 140, data transceiver antenna 141, wireless charging antenna 142, substrate 143, magnet 144, LED lamp 145. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0036] According to the following Figure 1-Figure 7 An integrated helicopter vibration detection device 100 provided in an embodiment of the present invention is described. The vibration detection device 100 includes a mounting body 110 , a flexible mainboard 120 , a battery 130 , and a data transceiver antenna 141 .

[0037] The installation body 110 defines an installation cavity 111. The flexible mainboard 120 is installed in the installation cavity 111 of the installation body 110 in a curved manner and is encapsulated by an insulating material 123, and the insulating material 123 is used to protect the flexible mainboard 120. A vibration sensor 121 and a wireless chip 122 are integrated on the flexible mainboard 120. The vibration sensor 121 is used for vibration detection of the helicopter. The vibration sensor 121 is signal-connected with the wireless chip 122 to transmit a vibration detection signal to the wireless chip 122, and the wireless chip 122 is used to transmit data and receive control signals sent by the host.

[0038] The battery 130 is installed in the installation cavity 111 of the installation body 110 and is surrounded by the flexible main board 120. Specifically, the flexible main board 120 is bent to form a cavity in the middle thereof, and the battery 130 is accommodated in the cavity in the middle of the flexible main board 120 to fully utilize the internal space of the installation cavity 111 and improve space utilization. The battery 130 is electrically connected to the flexible main board 120 to provide the power required for its operation.

[0039] The data transceiver antenna 141 is connected to the installation body 110, and the wireless chip 122 wirelessly transmits data to the host through the data transceiver antenna 141. That is to say, the wireless chip 122 can send the collected vibration detection signal of the vibration sensor 121 to the host wirelessly through the data transceiver antenna 141, without the need to connect cables or wires between the vibration sensor and the host for data transmission.

[0040] The integrated helicopter vibration detection device provided by the embodiment of the present invention has a built-in battery to support its own power needs, and supports wireless data transmission, realizes wireless data interaction with the host, and has no external cables, which reduces the difficulty of wiring, avoids the impact of cable performance degradation and damage, and avoids the inconvenience caused by abnormal cable interfaces. In addition, the flexible mainboard is placed in the installation cavity of the installation body in a bent form, and the middle space of the flexible mainboard is fully utilized to install the battery, which improves space utilization, so that the vibration detection device provided by the embodiment of the present invention has the characteristics of small size and high integration. Compared with traditional wired sensors, it is more convenient to install and deploy, and solves many inconveniences caused by cables.

[0041] In some embodiments, Figure 5 and Figure 6 As shown in FIG. 1 , the flexible main board 120 is unfolded into a rectangular plate. The vibration sensor 121 and the wireless chip 122 are arranged on the main body of the flexible main board 120. When the flexible main board 120 is installed in the installation cavity 111 of the installation body 110, the flexible main board 120 is bent around its long side or its wide side to form a Figure 5 The cylindrical shape shown in the figure. The bent flexible mainboard 120 is installed in the installation cavity 111, which effectively reduces the size of the vibration detection device 100 and makes the vibration detection device 100 more integrated.

[0042] In some optional embodiments, the bending radius of the flexible mainboard 120 is 3mm-10mm, so that the size of the vibration sensor 100 is relatively reasonable while ensuring the basic functions of the flexible mainboard 120. If the bending radius of the flexible mainboard 120 is less than 3mm, the installation space of various components on the flexible mainboard 120 will be insufficient, and the basic functional requirements of the flexible mainboard 120 cannot be met. If the bending radius of the flexible mainboard 120 is greater than 10mm, it will occupy a larger space, which will lead to a larger size of the vibration sensor 100.

[0043] In some preferred embodiments, the bending radius of the flexible main board 120 is 5 mm.

[0044] In some optional embodiments, the wrapping central angle of the flexible main board 120 is greater than or equal to 270 degrees, that is, the central angle corresponding to the notch formed between the two opposite ends after the flexible main board 120 is bent is less than or equal to 90 degrees, so as to reduce the bending radius of the flexible main board 120 and improve the space utilization in the installation cavity 111.

[0045] In some preferred embodiments, the wrapping central angle of the flexible main board 120 is 330°-355°.

[0046] In order to ensure the bending radius of the flexible main board 120 after being encapsulated by the insulating material 123, in some embodiments, the flexible main board 120 is designed by a segmented hollow design, such as Figure 5 and Figure 6 As shown, the flexible main board 120 is provided with a plurality of hollow holes 124. After being encapsulated by the insulating material 123, the hollow holes 124 are filled with the insulating material 123. The insulating material passing through the hollow holes 124 is connected with the insulating material of other parts to form an integrated structure, and the bending shape of the flexible component 120 is fixed, thereby ensuring the fixing of the bending radius of the flexible main board 120. While protecting the flexible main board 120, the installation of the flexible main board 120 is facilitated.

[0047] Optionally, the insulating material 123 is silicone, which has the advantages of low cost and good insulation performance.

[0048] In some embodiments, the vibration sensor 121 integrated on the flexible mainboard 120 is a three-axis vibration sensor having three sensitive axes. Optionally, the three-axis vibration sensor has a measuring range of ±5g and a maximum shock of 5000g.

[0049] In some embodiments, the wireless chip 122 integrated on the flexible mainboard 120 includes a Bluetooth module, a wireless transmission module and a data storage module. The data storage module is used to store the vibration data detected by the vibration sensor 121. The Bluetooth module is used to pair with the device host and receive control signals. The wireless transmission module is used to transmit the data stored in the data storage module to the host through the data transceiver antenna 141. That is to say, the vibration detection device 100 provided in the embodiment of the present invention transmits the data signal and the control signal in separate channels. The transmission of the data signal is realized by the wireless transmission module. The transmission of the control signal after interconnection with the host is realized by the Bluetooth module. The host can send a control signal to the Bluetooth module via Bluetooth to quickly control the vibration detection device 100. The data storage module of the flexible mainboard 120 has the function of storing data, and can perform complete data transmission after the test is completed. Compared with the wired vibration sensor in the related art that outputs analog quantities and has no storage unit, it can ensure the stability and accuracy of data transmission.

[0050] Furthermore, the wireless transmission module can also be used for synchronous transmission of data during the test process, that is, during the test process, the vibration detection signal of the vibration sensor 121 is synchronously transmitted to the host by the wireless transmission module, so that the host side can grasp the state and data of the vibration detection device 100 in real time. However, the transmission process is a one-way transmission, and the host-side data may have errors, interruptions, etc. caused by interference. Therefore, after the test is completed, the accurate and complete data stored in the data storage module is transmitted to the host side by wireless transmission, which can avoid the influence of the errors and interruptions of the above-mentioned one-way transmission and make the data acquisition more accurate.

[0051] Optionally, the wireless chip 122 uses an ESP32 chip, and the wireless transmission module is specifically a 2.4G wifi module, which can be used for large data transmission. The Bluetooth module is a 2.4G Bluetooth, and the Bluetooth module is mainly used for control and synchronization.

[0052] Preferably, the wireless chip 122 on the flexible mainboard 120 adopts the technology of wirebonding after bare die thinning, instead of using the traditional plastic package chip, which can greatly reduce the area of ​​the flexible mainboard 120 and further reduce the size of the vibration detection device 100.

[0053] In some embodiments, in order to further improve the integration of the vibration detection device 100 and avoid the instability of the external interface, the vibration detection device 100 uses wireless charging to charge the battery 130. In these embodiments, the vibration detection device 100 also includes a wireless charging antenna 142, and the flexible mainboard 120 is integrated with a charging management module and a wireless charging circuit. The charging management module is used to manage and protect the charging and discharging of the battery 130. The wireless charging circuit receives the wireless energy sent by the external charging module through the wireless charging wire 142, and converts the wireless energy into voltage and charges the battery 130 through the charging management module.

[0054] When the battery 130 is low on power and needs to be charged, the external charging module is brought close to the wireless charging wire 142 of the vibration detection device 100, and the wireless charging wire 142 receives the wireless energy sent by the external charging module and transmits the wireless energy to the wireless charging circuit integrated on the flexible mainboard 120. The wireless charging circuit converts the wireless energy into voltage and charges the battery 130 through the charging management module. Therefore, there is no need to regularly replace the battery 130, or to set an external physical interface for charging the battery 130 on the vibration detection device 100.

[0055] Furthermore, the vibration detection device 100 integrates the data transceiver antenna 141 and the wireless charging antenna 142, and the vibration detection device 100 includes an antenna board 140, and the antenna board 140 includes a substrate 143, a data transceiver antenna 141 and a wireless charging antenna 142, and the data transceiver antenna 141 and the wireless charging antenna 142 are welded on the substrate 143. The antenna board 140 also includes a magnet 144 provided on the substrate 143, and the magnet 144 is used to magnetically dock with an external charging module for convenient charging.

[0056] In some embodiments, Figure 1 As shown, the installation body 110 includes a housing 113 and a back cover 114, and the back cover 114 is detachably connected to the housing 113 to define a mounting cavity 111. The back cover 114 is detachably arranged so as to mount the flexible mainboard 120 and the battery 130 in the mounting cavity 111. In order to prevent the housing 113 from affecting the transmission of signals, as shown in FIG. Figure 3 As shown, a notch 115 is provided on the housing 113, the notch 115 is connected to the installation cavity 111, and the antenna board 140 is provided at the notch 115. Furthermore, the installation cavity 111 and the notch 115 are filled with silica gel 112 to fix the relative positions of the flexible mainboard 120, the battery 130 and the antenna board 140, and the flexible mainboard 120, the battery 130 and the antenna board 140 are completely fixed to the installation body 110 to prevent damage caused by movement.

[0057] In some specific embodiments, Figure 1-Figure 3As shown, the housing 113 is a cylindrical metal housing, and the housing 113 has an open first end and a closed second end in its radial direction, and the back cover 114 covers the first end of the housing 113. A portion of the outer circumferential surface of the housing 113 forms a mounting plane 1131, and the mounting plane 1131 is orthogonal to one of the sensitive axes of the vibration sensor 121. The design of the mounting plane 1131 can make it easier to fix the vibration detection device 100 at the point to be measured, so that the mounting plane 1131 is orthogonal to one of the sensitive axes of the vibration sensor 121, which is convenient for accurate positioning of the installation of the vibration detection device 100.

[0058] like Figure 8 As shown, an embodiment of the present invention further provides a detection method of a vibration detection device, the vibration detection device 100 is the vibration detection device 100 of any of the above embodiments, and the detection method includes:

[0059] The vibration detection device 100 performs self-test;

[0060] Pair the host with the vibration detection device 100 via Bluetooth and establish a data connection;

[0061] Install the vibration detection device 100 to the vibration part of the helicopter to be tested;

[0062] The host sends a control signal to the vibration detection device 100 to control the vibration detection device 100 to start;

[0063] The helicopter is started, and the vibration detection device 100 collects vibration data;

[0064] When the preset speed is reached and the preset time has passed, the helicopter stops running, and the host sends a control signal to the vibration detection device 100 to control the vibration detection device 100 to stop collecting;

[0065] The host sends a control signal to the vibration detection device 100 to control the vibration detection device 100 to wirelessly transmit the collected data to the host.

[0066] According to the following Figure 1-Figure 8 The vibration detection device 100 in a specific embodiment of the present invention is described.

[0067] like Figure 1 and Figure 2 As shown, the vibration detection device 100 includes a mounting body 110 , a flexible main board 120 , a battery 130 , and an antenna board 140 .

[0068] The installation body 110 includes a shell 113 and a back cover 114, wherein the inner wall surface of the first end of the shell 113 is provided with an internal thread, and the back cover 114 is provided with an external thread. When assembling the vibration detection device 100, the back cover 114 can be screwed into the first end of the shell 113 to form a threaded fit with the shell 113. Figure 4 As shown, the head of the rear cover 114 is a hexagonal nut type to facilitate installation, or the head of the rear cover 114 can also be a straight nut type or other shapes that are easy to install.

[0069] The flexible mainboard 120 is a rectangular plate, which integrates a vibration sensor 121, a wireless chip 122 (containing an MCU), a charging management module and a wireless charging circuit (not shown in the figure), wherein the vibration sensor 121 is a three-axis vibration sensor. A number of hollow holes 124 are also arranged on the flexible mainboard 120. After the flexible mainboard 120 is bent, it is encapsulated with a silicone material (insulating material 123) so that the bending radius of the flexible mainboard 120 is 5mm. The flexible mainboard 120 with a curved shape is placed in the housing 113. Then the battery 130 is placed in the housing 113 and surrounded by the flexible mainboard 120. The output end of the battery 130 is welded to the welding point of the flexible mainboard 120 (not shown in the figure), and the battery 130 can supply power to the entire flexible mainboard 120 when it works normally.

[0070] In this embodiment, the battery 130 is a cylindrical lithium battery with a diameter of 8 mm and a length of 20 mm.

[0071] like Figure 7 As shown, a data transceiver antenna 141, a wireless charging antenna 142 and a highly magnetic magnet 144 are welded on the substrate 143 of the antenna board 140. Among them, the data transceiver antenna 141 is a 2.4G ceramic antenna. In addition, a three-color LED lamp is also provided on the antenna board 140, and the three-color LED lamp 145 displays different colors to indicate different states of the vibration detection device 100. In this embodiment, the substrate 143 is an FR4 hard board. The antenna board 140 is placed at the notch 115 of the housing 113 to expose the antenna board 140. The antenna board 140 is connected to the flexible main board 120 through a flexible circuit board (FPC) extending from the flexible main board 120.

[0072] After the flexible main board 120, the battery 130, and the antenna board 140 are installed in place, silicone is poured into the installation cavity 111, and the silicone 112 fills the installation cavity 111 and the notch 115, so that the flexible main board 120, the battery 130, the antenna board 140 and the installation body 110 form an integrated structure to prevent damage caused by movement during use. Alternatively, after the flexible main board 120 and the battery 130 are installed in place, silicone is poured into the installation cavity 111, so that the silicone 112 fills the installation cavity 111, and then the antenna board 140 is placed at the notch 115, and connected to the flexible main board 120 through the flexible circuit board (FPC) extending from the flexible main board 120, and then the notch 115 and the antenna board 140 are fixed by plastic sealing with silicone.

[0073] like Figure 2As shown, the silica gel 112 completely fills the installation cavity 111 and covers the antenna board 140 .

[0074] like Figure 3 As shown, a portion of the outer circumference of the first end and a portion of the outer circumference of the second end of the shell 113 are coated with a color band 1132 with a width of about 5 mm. The color band 1132 can represent the overlapping area between the shell 113 and the back cover 114, and is used to characterize that this part can be fixed to the vibration area to be measured using a clamp.

[0075] When docking with an external charging module for wireless charging, the magnet 144 on the antenna board 140 magnetically docks the external charging module to ensure a stable charging process. The wireless charging circuit of the flexible mainboard 120 obtains power through the wireless charging antenna 142 on the antenna board 140, converts the power into voltage, and then charges the battery 130 through the charging management module.

[0076] The wireless chip 122 includes a Bluetooth module, a wireless transmission module and a data storage module. Among them, the data storage module is used to store the vibration detection signal transmitted by the vibration sensor 121. The Bluetooth module is a 2.4G Bluetooth module, which is used to pair with the device host and receive control signals for control and synchronization. The wireless transmission module is a 2.4G wifi module, which is used to transmit the data collected by the data storage module to the host through the data transceiver antenna 141. The wireless chip 122 separates the data and control channels.

[0077] The vibration detection device 100 of the embodiment of the present invention adopts integrated packaging technology, with a built-in 3-axis vibration sensor, a rechargeable lithium-ion battery, a wireless chip, a wireless charging module, etc., which can conveniently and quickly collect the vibration of the helicopter. At the same time, the vibration detection device 100 has a unique ID, can be paired with the host, and supports a one-host multi-sensor mode, that is, the host can be paired with multiple vibration detection devices 100 at the same time to expand the vibration monitoring points. The vibration detection device 100 supports self-test, calibration and calibration, which improves the accuracy of the measurement results compared to traditional cable-connected devices.

[0078] In addition, the vibration detection device 100 supports wireless charging and can be used with a wireless charging and energy replenishment module to wirelessly charge the battery 130, completely solving the many inconveniences caused by cables. The vibration detection device 100 also supports wireless data transmission, which enables wireless transmission of vibration information to the host after collection, and the Wifi signal data transmission method supports multiple vibration detection devices 100 networking for synchronous collection and data upload in sequence. In addition, the vibration detection device 100 itself has no physical interface to the outside world and can have IP67 waterproof rating, ensuring the overall safety and ease of use of the device, and facilitating maintenance and repair.

[0079] The specific operation steps of the detection method of the vibration detection device 100 provided in this embodiment are as follows:

[0080] Use the charging module to approach the vibration detection device 100 and attract the magnet 144. At this time, the vibration detection device 100 is awakened and activated, and the LED light 145 displays red light and flashes 3 times. At the same time, the charging module charges the battery 130 of the vibration detection device 100.

[0081] The vibration detection device 100 performs self-test;

[0082] The host establishes a data connection and pairing with the Bluetooth module of the wireless chip 122 of the vibration detection device 100 through Bluetooth Mesh to obtain the status and information of the vibration detection device 100. When the vibration detection device 100 has sufficient power and the self-test is successful, it can be in a standby state;

[0083] Use a tool to install the vibration detection device 100 to the vibration part of the helicopter to be tested;

[0084] The host is connected to one or more vibration detection devices 100, and after confirming that vibration collection can be started, the host-side start collection button is clicked, and the host sends a broadcast packet via Bluetooth. After the Bluetooth module of the vibration detection device 100 receives the signal, it starts to collect vibration data, and the LED light 145 flashes green. At this time, the host can receive the data and status of each vibration detection device 100. This state is one-way transmission, and the host-side data may have errors and interruptions caused by interference;

[0085] The helicopter is started, and the vibration detection device 100 collects vibration data;

[0086] When the preset speed is reached and the preset time has passed, the helicopter stops running, the host clicks to stop collecting, the host sends a broadcast packet via Bluetooth, and each vibration detection device 100 stops collecting after receiving the signal;

[0087] The host clicks and selects the number of the vibration detection device 100, and the vibration detection device 100 starts 2.4G Wifi for data transmission and sends the complete vibration data to the host;

[0088] After the data transmission is completed, the host sends a broadcast packet, and the vibration detection device 100 enters the sleep mode after receiving the signal;

[0089] After the data of each vibration detection device 100 is acquired in sequence, the host can be turned off.

[0090] The vibration detection device and detection method provided by the embodiment of the present invention use wireless forms for data transmission and charging, and there is no external cable, which reduces the difficulty of wiring and avoids the impact of cable performance degradation and damage; it is improved relative to the limitations of traditional wired analog sensors, with a built-in chip processor, which can support regular calibration, verification and self-test; there is no external physical interface, which is convenient to use and not easy to damage, avoiding the inconvenience caused by interface abnormalities of traditional wired analog sensors; wireless data interaction is adopted with the host, and multi-channel networking and simultaneous acquisition are supported. Compared with the traditional analog sensor solution that only supports 2-3 channels, the test range and effect can be improved; it has a small size and high integration, and is more convenient to install and deploy than traditional wired analog sensors; data can be transmitted synchronously during data acquisition to ensure that the sensor data and status can be clearly known during the test, and it also has a data storage function. After the test is completed, the data is read by the host via Wifi, and the final complete data can be obtained again, thereby improving the accuracy of the detection result.

[0091] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0092] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0093] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0094] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0095] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0096] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An integrated helicopter vibration detection device, characterized in that: include: An installation body, wherein an installation cavity is defined in the installation body; A flexible mainboard, the flexible mainboard is bent and installed in the installation cavity and is encapsulated by an insulating material, a vibration sensor and a wireless chip are integrated on the flexible mainboard, the vibration sensor is connected to the wireless chip signal to transmit a vibration detection signal to the wireless chip, and the wireless chip is used to transmit data and receive control signals; A battery, the battery is installed in the installation cavity and surrounded by the flexible mainboard, the battery is electrically connected to the flexible mainboard to provide the electric energy required for its operation; A data transceiver antenna is connected to the installation body, and the wireless chip wirelessly transmits data to the host through the data transceiver antenna.

2. The integrated helicopter vibration detection device according to claim 1, characterized in that: The flexible main board is unfolded into a rectangular plate; And / or, the bending radius of the flexible mainboard is 3mm-10mm, And / or, the wrapping central angle of the flexible mainboard is greater than or equal to 270 degrees.

3. The integrated helicopter vibration detection device according to claim 1 or 2, characterized in that: The flexible main board is provided with a plurality of hollow holes, and the hollow holes are filled with the insulating material.

4. The integrated helicopter vibration detection device according to claim 1, characterized in that: The wireless chip includes a Bluetooth module, a wireless transmission module and a data storage module. The data storage module is used to store the vibration data detected by the vibration sensor, the Bluetooth module is used to pair with the host and receive control signals, and the wireless transmission module is used to transmit the data stored in the data storage module to the host through the data transceiver antenna.

5. The integrated helicopter vibration detection device according to claim 1, characterized in that: It also includes a wireless charging antenna. The flexible mainboard is integrated with a charging management module and a wireless charging circuit. The charging management module is used to manage and protect the charging and discharging of the battery. The wireless charging circuit receives wireless energy sent by an external charging module through the wireless charging cable, and converts the wireless energy into voltage to charge the battery through the charging management module.

6. The integrated helicopter vibration detection device according to claim 5, characterized in that: It includes an antenna board, which includes a substrate and the data transceiver antenna and the wireless charging antenna welded on the substrate. The antenna board also includes a magnet arranged on the substrate, and the magnet is used for magnetically docking with an external charging module.

7. The integrated helicopter vibration detection device according to claim 6, characterized in that: The installation body includes an outer shell and a back cover, the back cover is detachably connected to the outer shell to define the installation cavity, the outer shell is provided with a notch, the antenna board is arranged at the notch, and the installation cavity and the notch are filled with silicone to fix the relative positions of the flexible mainboard, the battery and the antenna board.

8. The integrated helicopter vibration detection device according to claim 1, characterized in that: The installation body includes an outer shell and a back cover, the back cover is detachably connected to the outer shell to define the installation cavity, the outer shell is a cylindrical metal shell, a portion of the outer circumference of the outer shell forms an installation plane, and the installation plane is orthogonal to one of the sensitive axes of the vibration sensor.

9. The integrated helicopter vibration detection device according to any one of claims 1, 5-8, characterized in that: The vibration sensor is a three-axis vibration sensor having sensitive axes in three directions.

10. A detection method of a vibration detection device, characterized in that: The vibration detection device is a vibration detection device according to any one of claims 1 to 9, and the detection method comprises: Pairing the host with the vibration detection device via Bluetooth and establishing a data connection; Installing the vibration detection device to the vibration part of the helicopter to be tested; The host sends a control signal to the vibration detection device to control the vibration detection device to start; Starting the helicopter, and the vibration detection device collecting vibration data; When the preset speed is reached and the preset time has passed, the helicopter stops running, and the host sends a control signal to the vibration detection device to control the vibration detection device to stop collecting data; The host sends a control signal to the vibration detection device to control the vibration detection device to wirelessly transmit the collected data to the host.

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