Portable rotary mechanical vibration analysis device for nuclear power plant

Abstract

The utility model relates to a portable rotary mechanical vibration analysis device for a nuclear power plant. The portable rotary mechanical vibration analysis device comprises a vibration monitoring module, an edge calculation module, a liquid crystal display module and a man-machine interaction module, the input end of the vibration monitoring module comprises a plurality of acquisition ports, and the vibration monitoring module acquires and processes the sensing signal output by the sensor module and then outputs a digital acquisition signal; the edge calculation module analyzes and processes the digital acquisition signal to obtain a monitoring data waveform, a frequency spectrum and a historical curve; the liquid crystal display module outputs and displays the vibration monitoring signal, the monitoring data waveform, the frequency spectrum and the historical curve; and the man-machine interaction module realizes a man-machine interaction function. According to the utility model, vibration frequency spectrum waveform data can be visually checked and analyzed, the operation is simple, the carrying is convenient, and the problem that the traditional device can only be externally connected with an upper computer to check the analysis data is solved; and multi-channel data can be acquired at the same time, the problems of few off-line measurement channels and large limitation are solved, and the applicability is wide.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of vibration measurement more specifically, relate to a kind of portable rotating machinery vibration analysis device of nuclear power plant. BACKGROUND

[0002] For rotating machinery equipment, most of the faults are related to vibration. The general method of rotating machinery vibration measurement in nuclear power plants is to fix vibration sensors on rotating machinery equipment. The vibration signals are converted into electrical signals by a transmitter. These electrical signals are converted into digital signals by a data acquisition device for storage and analysis. Vibration acquisition and analysis devices are widely used in vibration measurement of many rotating machinery equipment in nuclear power plants.

[0003] The traditional rotating machinery vibration analysis device has the following problems:

[0004] Although offline vibration measurement instruments are small in size, they cannot continuously monitor rotating equipment. The number of acquisition channels is generally small, which has great limitations.

[0005] Online vibration monitoring devices can continuously monitor the vibration of rotating equipment. However, they generally require an upper computer with acquisition software. They are large in size, inconvenient to carry, complex to operate, and require measurement personnel to connect the upper computer for communication to view the measurement strain data. They cannot quickly and directly view the strain output, and the cost of the instrument is high. INVENTION CONTENTS

[0006] The technical problem to be solved by the utility model is to provide a portable rotating machinery vibration analysis device for nuclear power plants to solve the problems existing in the prior art.

[0007] The utility model adopts the technical scheme to solve its technical problem: a portable rotating machinery vibration analysis device for nuclear power plants is constructed, which includes a vibration monitoring module, an edge computing module, a liquid crystal display module, and a human-computer interaction module.

[0008] The input end of the vibration monitoring module is connected with the sensor module, the output end of the vibration monitoring module is connected with the edge computing module, and the edge computing module is connected with the liquid crystal display module and the human-computer interaction module respectively. The input end of the vibration monitoring module includes a plurality of acquisition ports, and the sensor module includes a plurality of vibration sensors and a key phase sensor. The plurality of acquisition ports are connected with the plurality of vibration sensors and the key phase sensor respectively.

[0009] The vibration monitoring module is used to collect the sensing signals output by the sensor module, and output digital acquisition signals after analog-to-digital conversion of the sensing signals.

[0010] The edge computing module is used for secondary processing of the digital acquisition signal, obtaining a vibration monitoring signal, and performing analysis and processing based on the vibration monitoring signal to obtain a monitoring data waveform, a frequency spectrum and a history curve;

[0011] The liquid crystal display module is used for outputting and displaying any one or more of the vibration monitoring signal, the monitoring data waveform, the frequency spectrum and the history curve;

[0012] The man-machine interaction module is used for generating a trigger signal according to user operation information and sending the trigger signal to the edge computing module.

[0013] The nuclear power plant portable rotating machinery vibration analysis device further comprises a battery module and a button switch module.

[0014] The battery module is connected with an external power supply and is used for converting the power supply provided by the external power supply into internal power supply.

[0015] The button switch module is connected with the battery module and is used for controlling the on-off of the power of the system.

[0016] The nuclear power plant portable rotating machinery vibration analysis device further comprises a voltage boosting module and a cooling fan module.

[0017] The input end of the voltage boosting module is connected with the button switch module, the output end of the voltage boosting module is connected with the vibration monitoring module and the edge computing module respectively, and the cooling fan module is connected with the button switch module.

[0018] The voltage boosting module is used for boosting the internal power supply output by the battery module to obtain working voltage for the vibration monitoring module and the edge computing module.

[0019] The cooling fan module is used for cooling the system.

[0020] The button switch module comprises a self-locking reset switch with a lamp.

[0021] The self-locking reset switch with a lamp is used for controlling the on-off of the power of the system.

[0022] The man-machine interaction module comprises a keyboard and a capacitive touch panel.

[0023] The keyboard and the capacitive touch pad are connected with the edge computing module respectively, and are used for generating a trigger signal according to user operation information and sending the trigger signal to the edge computing module.

[0024] The vibration monitoring module adopts ARM+FPGA dual-core high-speed AD mode to collect signals.

[0025] The vibration monitoring module comprises a plurality of vibration collection channels and one rotating speed collection channel.

[0026] The one rotating speed collection channel is connected with the one rotating speed collection port, and the plurality of vibration collection channels are connected with the plurality of vibration collection ports respectively.

[0027] The plurality of vibration collection channels are used for collecting vibration sensing signals, and the one rotating speed collection channel is used for collecting rotating speed sensing signals.

[0028] The vibration monitoring module comprises a plurality of vibration collection circuits and one rotating speed collection circuit.

[0029] The plurality of vibration collection circuits are correspondingly arranged with the plurality of vibration collection channels, and each vibration collection circuit is used for performing analog-digital conversion processing on the received vibration sensing signals and outputting digital vibration signals.

[0030] The rotating speed collection circuit is correspondingly arranged with the rotating speed collection channel, and the rotating speed collection circuit is used for performing analog-digital conversion processing on the received rotating speed sensing signals and outputting digital rotating speed signals.

[0031] Each vibration collection circuit comprises a switch control terminal, a third diode, a forty-first resistor, a forty-fifth resistor, a forty-seventh resistor, a second diode, a forty-second diode, a thirty-ninth resistor, a twenty-first capacitor, a first operational amplifier, a forty-sixth resistor, a twenty-fourth capacitor, a forty-second resistor, a forty-fourth resistor, a fortieth resistor, a second operational amplifier and a forty-third resistor.

[0032] The switch control terminal is connected with a power supply input terminal, the third diode is connected between a signal positive input terminal and a signal negative input terminal, the positive input terminal of the first operational amplifier is connected with the signal positive input terminal through the forty-first resistor, the negative input terminal of the first operational amplifier is connected with the signal negative input terminal through the forty-fifth resistor, and the second diode and the forty-second diode are connected in series and then connected between the positive input terminal and the negative input terminal of the first operational amplifier.

[0033] The thirty-ninth resistor is connected between the positive input terminal of the first operational amplifier and the ground, and the twenty-first capacitor is connected with the thirty-ninth resistor in parallel; the first end of the forty-seventh resistor is connected with the signal negative input terminal, and the second end of the forty-seventh resistor is grounded; the forty-sixth resistor is connected between the negative input terminal and the output terminal of the first operational amplifier, and the twenty-fourth capacitor is connected with the forty-sixth resistor in parallel.

[0034] The output terminal of the first operational amplifier is connected with the negative input terminal of the second operational amplifier through the forty-second resistor, and the positive input terminal of the second operational amplifier is grounded through the forty-fourth resistor; the output terminal of the second operational amplifier outputs the digital vibration signal through the forty-third resistor, and the fourth zero resistor is connected between the negative input terminal and the output terminal of the second operational amplifier.

[0035] In the nuclear power plant portable rotating machinery vibration analysis device, the rotating speed acquisition circuit comprises a sixth diode, a seventh diode, a forty-ninth resistor, a forty-eighth resistor, a twenty-fifth capacitor, a fifty-eighth resistor, a third operational amplifier, a sixtieth resistor, a thirty-third capacitor, a thirty-first capacitor, a timer, a sixty-second resistor, a sixty-first resistor, a sixty-third resistor, a thirty-second capacitor, a comparator, a fifty-seventh resistor, a fiftieth resistor, a fifty-fourth resistor, a fifty-fifth resistor, a thirtieth capacitor, a fifty-ninth resistor, a twenty-ninth capacitor, a fifty-sixth resistor and an operational chip.

[0036] The first end of the sixth diode and the first end of the seventh diode are respectively connected with a rotating speed signal input terminal, the second end of the sixth diode is connected with the positive input terminal of the third operational amplifier through the forty-ninth resistor, and the second end of the seventh diode is grounded; the positive input terminal of the third operational amplifier is grounded through the forty-eighth resistor, and the twenty-fifth capacitor is connected with the forty-eighth resistor in parallel; the negative input terminal of the third operational amplifier is grounded through the fifty-eighth resistor, the sixtieth resistor is connected between the negative input terminal and the output terminal of the third operational amplifier, and the thirty-third capacitor is connected with the sixtieth resistor in parallel.

[0037] The output end of the third operational amplifier is connected to the positive input end of the timer through the thirty-first capacitor, the first end of the sixty-second resistor is connected to the positive input end of the timer, and the second end of the sixty-second resistor is grounded; the negative input end of the timer is connected to its output end through the sixty-third resistor, and the output end of the timer is connected to the negative input end of the comparator through the sixty-first resistor;

[0038] The thirty-second capacitor is connected between the positive input end and the negative input end of the comparator, the positive input end of the comparator is connected to the power supply voltage in sequence through the fifty-seventh resistor and the fiftieth resistor, the first end of the fifty-fourth resistor is connected to the fiftieth resistor, and the second end of the fifty-fourth resistor is connected to the output end of the comparator;

[0039] The third pin of the operational chip is connected to the output end of the comparator, and the second pin of the operational chip is connected to the power supply voltage through the fifty-fifth resistor; the thirty-first capacitor is connected between the second pin and the third pin of the operational chip, the first end of the fifty-ninth resistor is connected to the power supply voltage, and the second end of the fifty-ninth resistor is connected to the third pin of the operational chip; the sixth pin of the operational chip outputs the digital speed signal, the twenty-ninth capacitor is connected to the sixth pin of the operational chip, and the fifty-sixth resistor is connected to the twenty-ninth capacitor in parallel.

[0040] The nuclear power plant portable rotating machinery vibration analysis device provided by the utility model has the following beneficial effects: comprising a vibration monitoring module, an edge computing module, a liquid crystal display module and a man-machine interaction module; the input end of the vibration monitoring module comprises a plurality of acquisition ports, the vibration monitoring module outputs digital acquisition signals after collecting and processing sensing signals output by the sensor module; the edge computing module analyzes and processes the digital acquisition signals to obtain monitoring data waveforms, frequency spectrums and historical curves; the liquid crystal display module outputs and displays vibration monitoring signals, monitoring data waveforms, frequency spectrums and historical curves; and the man-machine interaction module realizes man-machine interaction functions. The utility model can intuitively view vibration frequency spectrum waveform data and analyze the vibration frequency spectrum waveform data, is simple to operate, convenient to carry, solves the problem that a traditional device must be connected to an upper computer to use and view and analyze data, can simultaneously acquire multi-channel data, solves the problems of few offline measurement channels and great limitations, and is widely applicable. BRIEF DESCRIPTION OF DRAWINGS

[0041] The utility model will be further described below in combination with the drawings and embodiments, and the drawings show:

[0042] Figure 1 It is the principle block diagram of the nuclear power plant portable rotating machinery vibration analysis device provided by the utility model;

[0043] Figure 2 is a structural schematic view of a portable rotating machinery vibration analysis device for a nuclear power plant provided by the present application;

[0044] Figure 3 is a circuit schematic diagram of a vibration acquisition circuit provided by the present application;

[0045] Figure 4 is a circuit schematic diagram of a rotating speed acquisition circuit provided by the present application;

[0046] Figure 5 is a frequency spectrum analysis diagram in the embodiment of the present application. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0048] In view of the problems in the prior art, the present application provides a portable rotating machinery vibration analysis device for a nuclear power plant, which solves the problems of less acquisition channels of a traditional offline vibration measuring instrument, large volume of a traditional online vibration monitoring device, inconvenience in carrying, complicated operation, and high cost.

[0049] Specifically, as shown in Figure 1 some embodiments, the portable rotating machinery vibration analysis device for a nuclear power plant includes a vibration monitoring module 9, an edge computing module 10, a liquid crystal display module 11, and a human-computer interaction module 12. The input end of the vibration monitoring module 9 is connected with a sensor module, the output end of the vibration monitoring module 9 is connected with the edge computing module 10, the edge computing module 10 is connected with the liquid crystal display module 11 and the human-computer interaction module 12 (i.e. a keyboard, a touch panel module) respectively; the input end of the vibration monitoring module 9 includes a plurality of acquisition ports, the sensor module includes a plurality of vibration sensors 7 and a key phase sensor 8; the plurality of acquisition ports are connected with the plurality of vibration sensors 7 and the key phase sensor 8 respectively.

[0050] Specifically, the vibration monitoring module 9 is configured to collect the sensing signals output by the sensor module, and output digital collection signals after the sensing signals are analog-to-digital converted; the edge computing module 10 is configured to perform secondary processing on the digital collection signals, obtain vibration monitoring signals, and perform analysis and processing based on the vibration monitoring signals to obtain monitoring data waveforms, frequency spectrums and historical curves; the liquid crystal display module 11 is configured to output and display any one or more of the vibration monitoring signals, the monitoring data waveforms, the frequency spectrums and the historical curves; and the human-computer interaction module 12 is configured to generate a trigger signal according to user operation information and send the trigger signal to the edge computing module 10.

[0051] Optionally, the sensor module can include 12 vibration sensors (wherein the vibration sensors are acceleration sensors) and one magnetic speed sensor. The 12 vibration sensors are arranged at designated positions of the rotating mechanical equipment to be measured, are connected to the vibration monitoring module 9 in a wired manner, convert vibration / speed signals into electrical signals (i.e., sensing signals), and send the sensing signals to the vibration monitoring module 9.

[0052] Optionally, in the embodiment of the utility model, the vibration monitoring module 9 adopts ARM+FPGA dual-core high-speed AD mode to collect signals. By adopting the ARM+FPGA dual-core high-speed AD collection, the analog signals of the vibration sensors and the speed sensor can be converted into digital signals, and then after filtering and hardware processing, the digital signals are connected to the edge computing module 10 through a network cable.

[0053] In some embodiments, the vibration monitoring module 9 includes a plurality of vibration collection channels and one speed collection channel, and a plurality of collection ports include a plurality of vibration collection ports and one speed collection port. Wherein, the one speed collection channel is connected to the one speed collection port, and the plurality of vibration collection channels are respectively connected to the plurality of vibration collection ports; the plurality of vibration collection channels are configured to collect vibration sensing signals, and the one speed collection channel is configured to collect speed sensing signals. Correspondingly, the vibration monitoring module 9 includes a plurality of vibration collection circuits and one speed collection circuit; the plurality of vibration collection circuits are correspondingly arranged with the plurality of vibration collection channels, and each vibration collection circuit is configured to output a digital vibration signal after analog-to-digital conversion processing of the received vibration sensing signal; the speed collection circuit is correspondingly arranged with the speed collection channel, and the speed collection circuit is configured to output a digital speed signal after analog-to-digital conversion processing of the received speed sensing signal.

[0054] Specifically, when the sensor module is provided with 12 acceleration sensors and one magnetic speed sensor, correspondingly, the vibration monitoring module 9 is provided with 12 vibration collection ports and one speed collection port, and the vibration collection channels and the vibration collection circuits are both provided with 12, and are correspondingly connected in a wired manner.

[0055] In some embodiments, the edge computing module 10 further processes the data preliminarily processed by the vibration monitoring module 9, and saves the data to the local, and the edge computing module 10 is provided with a local MySQL database and a monitoring platform, and is connected with the liquid crystal display module 11 and the human-computer interaction module 12 respectively. Optionally, the edge computing module 10 used in the utility model can adopt an existing edge computer, for example, an edge computer with a model of UNO-2271G. The utility model integrates the existing edge computer, and uses the function of the edge computer to process and analyze the monitoring signals, so as to achieve the purpose of integrating the upper computer function.

[0056] In some embodiments, the liquid crystal display module 11 includes a 15.6-inch liquid crystal display screen, which can transmit signals with the edge computing module 10 through an HDMI line and supply power to the liquid crystal display module 11 through a USB-5V power line. The liquid crystal display module 11 can make the edge computing module 10 visual, that is, the liquid crystal display module 11 can read the data in the edge computing module 10, such as monitoring data waveforms, frequency spectra, historical curves, real-time vibration signals and rotational speed signals.

[0057] In some embodiments, the human-computer interaction module 12 includes a keyboard and a capacitive touchpad, and the keyboard and the capacitive touchpad are connected with the edge computing module 10 respectively, and are used to generate a trigger signal according to user operation information and send the trigger signal to the edge computing module 10. Specifically, the keyboard can be a 104-key keyboard. The keyboard and the capacitive touchpad can supply power and transmit signals with the edge computing module 10 through a USB line. The keyboard and the capacitive touchpad make the edge computing module 10 operable, and add a human-computer interface, for example, a user can configure hardware parameters and perform data screening and analysis through the keyboard and / or the capacitive touchpad.

[0058] Further, as shown in Figure 1 The nuclear power plant portable rotating machinery vibration analysis device further includes a battery module 2 and a button switch module 3. The battery module 2 is connected with the external power supply 1, and is used to convert the power supply provided by the external power supply 1 into internal power supply. The button switch module 3 is connected with the battery module 2, and is used to control the on-off of the electric energy of the system.

[0059] Specifically, the external power supply 1 is a 12.6V direct current, and the battery module 2 is charged through the external power supply 1, and then the nuclear power plant portable rotating machinery vibration analysis device is powered by the battery module 2. Optionally, in the embodiment of the utility model, the battery module 2 adopts a 15000mA polymer explosion-proof lithium battery pack, which is safe and reliable, provides 12V stable direct current output, and is connected with the button switch module 3.

[0060] Optionally, in the utility model embodiment, the button switch module 3 comprises: a lamp self-locking reset switch; the lamp self-locking reset switch is used for controlling the on-off of system electric energy; specifically, the button switch module 3 adopts the lamp self-locking reset switch, the button lamp is bright when the switch is pressed down, and the equipment is powered on; the button lamp is extinguished when the switch is pressed down again, and the equipment is powered off.

[0061] Further, as shown in the figure, Figure 1 The nuclear power plant portable rotating machinery vibration analysis device further comprises a booster module 4 and a cooling fan module 5; the input end of the booster module 4 is connected with the button switch module 3, the output end of the booster module 4 is connected with the vibration monitoring module 9 and the edge computing module 10 respectively, and the cooling fan module 5 is connected with the button switch module 3; the booster module 4 is used for boosting the internal power supply output by the battery module 2 to obtain working voltage for the vibration monitoring module 9 and the edge computing module 10; and the cooling fan module 5 is used for cooling the system.

[0062] Optionally, in the utility model embodiment, the booster module 4 can convert 12V output by the battery into 24V voltage through DC-DC conversion, and provide 24V power supply in connection with the vibration monitoring module 9 and the edge computing module 10. The cooling fan module 5 comprises three cooling fans connected in parallel, and the maximum utilization of effective space improves the cooling efficiency.

[0063] Reference Figure 2 , Figure 2 The utility model provides a nuclear power plant portable rotating machinery vibration analysis device structure schematic view.

[0064] The appearance size of the nuclear power plant portable rotating machinery vibration analysis device is 400*315*126mm, the material is aluminum alloy, and the device has the advantages of high hardness and light weight.

[0065] As shown in the figure, Figure 2 On the outside of the nuclear power plant portable rotating machinery vibration analysis device, the front side contains an arc-shaped telescopic handle, which can buffer the pulling force in the carrying process and protect the instrument body from damage; the rear side contains an interface panel: 12 BNC interfaces 101 can connect acceleration sensors, a 4-core interface 102 can connect a speed sensor, a DC interface 103 can connect a power module for charging, an RJ45 interface 105 can externally connect a network cable and communicate with external equipment, and two USB interfaces 104 can externally connect a keyboard / mouse / USB flash disk; the left side contains a fan vent (not shown), which is used for ventilation and heat dissipation. Figure 2The left side of the three cuboids is shown; the right side includes a button switch (i.e., button switch module 3) for controlling the start and stop of the device; the upper side includes a keyboard touchpad module (i.e., keyboard and capacitive touchpad) and a liquid crystal display module 11, wherein the liquid crystal display module 11 is designed as a flip cover.

[0066] Inside the nuclear power plant portable rotating machinery vibration analysis device, the bottom surface is sequentially installed from left to right with an edge computing module 10, a vibration monitoring module 9, and a battery module 2, wherein the two USB ports and one network port of the edge computing module 10 are sequentially connected with the two USB ports and one network port (RJ45 interface) of the rear side; the vibration acquisition channels "CH1-CH12" of the vibration monitoring module 9 are connected with the 12 BNC interfaces (vibration acquisition ports) of the rear side, and the rotation speed acquisition channel "FI" is connected with a 4-core interface of the rear side; the input port of the battery module 2 is connected with a DC interface of the rear side, and the output port is connected with the button switch module 3 of the right side.

[0067] Inside the nuclear power plant portable rotating machinery vibration analysis device, the front side is installed with a boost module 4 to provide appropriate power supply voltage for the edge computing module 10 and the vibration monitoring module 9; the left side is installed with three side-by-side cooling fans and an externally connected solid state disk 106, the cooling fans cool the edge computing module 10 and the vibration monitoring module 9 to make them perform optimally, and the solid state disk connects the edge computing module 10 to make it have greater data storage capacity.

[0068] In one embodiment, as shown in Figure 3 Each vibration acquisition circuit includes a switch control terminal P3, a third diode VD3, a forty-first resistor R41, a forty-fifth resistor R45, a forty-seventh resistor R47, a second diode VD2, a forty-second diode VD4, a thirty-ninth resistor R39, a twenty-first capacitor C21, a first operational amplifier U3A, a forty-sixth resistor R46, a twenty-fourth capacitor C24, a forty-second resistor R42, a forty-fourth resistor R44, a fortieth resistor R40, a second operational amplifier U3B, and a forty-third resistor R43.

[0069] The switch control terminal P3 is connected with the power supply input terminal, the third diode VD3 is connected between the signal positive input terminal and the signal negative input terminal, the positive input terminal of the first operational amplifier U3A is connected with the signal positive input terminal through the forty-first resistor R41, the negative input terminal of the first operational amplifier U3A is connected with the signal negative input terminal through the forty-fifth resistor R45, the second diode VD2 and the fourth diode VD4 are connected in series between the positive input terminal and the negative input terminal of the first operational amplifier U3A; the thirty-ninth resistor R39 is connected in parallel between the positive input terminal of the first operational amplifier U3A and the ground, the twenty-first capacitor C21 is connected in parallel with the thirty-ninth resistor R39; the first end of the forty-seventh resistor R47 is connected with the signal negative input terminal, the second end of the forty-seventh resistor R47 is connected with the ground (AGND_AI); the forty-sixth resistor R46 is connected between the negative input terminal and the output terminal of the first operational amplifier U3A, the twenty-fourth capacitor C24 is connected in parallel with the forty-sixth resistor R46; the output terminal of the first operational amplifier U3A is connected with the negative input terminal of the second operational amplifier U3B through the forty-second resistor R42, the positive input terminal of the second operational amplifier U3B is connected with the ground through the forty-fourth resistor R44; the output terminal of the second operational amplifier U3B outputs the digital vibration signal through the forty-third resistor R43, the fourth resistor R40 is connected between the negative input terminal and the output terminal of the second operational amplifier U3B.

[0070] As shown in Figure 3 The power supply part: input power supply; the circuit has an input power supply of 24V_AI, which is protected by the fuse FU2 (model FSMD020-1206). At the same time, the power supply provides power for the subsequent circuit through the D3 diode, and the pm15V_AI power supply is connected to the circuit through the P3 interface, providing dual power supply for the operational amplifier and other components. Among them, the switch control terminal P3 can control the on-off of the vibration acquisition circuit power supply.

[0071] The signal input part: there are two signal input ports: AVin and ACin. The AVin signal is connected to the non-inverting input terminal (pin 3) of the operational amplifier U3A through the resistor R41 (62KΩ). The ACin signal is connected to the inverting input terminal (pin 2) of the operational amplifier U3A after being divided by resistors R45 (62KΩ) and R47 (240Ω).

[0072] The operational amplifier part: two operational amplifiers U3A and U3B (model XL5532) are used in the circuit. U3B constitutes a differential amplifier. The output of U3B is output to the AAOUT port through the resistor R43 (470Ω). U3A is used for signal buffering or other auxiliary functions, and its connection mode shows that it provides a stable input reference and auxiliary processing signal for U3B.

[0073] Filtering and protection part: multiple capacitors (C21, C22, C23, C24, etc.) are used in the circuit, mainly playing a filtering role, filtering out high-frequency noise, stabilizing the circuit work. Resistors R39 (30KΩ), R40 (51KΩ), etc. cooperate with capacitors to play the role of filtering and voltage division, etc., to ensure the stability of the signal input to the operational amplifier.

[0074] The circuit is a circuit with differential input and amplification function. The input signals AVin and ACin are differentially amplified by the operational amplifier U3B and output from the AAOUT port. The power supply part supplies power to the circuit through 24V_AI and ±15V_AI, and multiple capacitors and resistors in the circuit play the roles of filtering, voltage division, etc.

[0075] In one specific embodiment, as shown in Figure 4 The rotation speed acquisition circuit includes a sixth diode VD6, a seventh diode VD7, a forty-ninth resistor R49, a forty-eighth resistor R48, a twenty-fifth capacitor C25, a fifty-eighth resistor R58, a third operational amplifier U4A, a sixty-second resistor R62, a sixty-first resistor R61, a sixty-third resistor R63, a thirty-second capacitor C32, a comparator U6, a fifty-seventh resistor R57, a fiftieth resistor R50, a fifty-fourth resistor R54, a fifty-fifth resistor R55, a thirtieth capacitor C30, a fifty-ninth resistor R59, a twenty-ninth capacitor C29, a fifty-sixth resistor R56, and an operational chip U5.

[0076] The first end of the sixth diode VD6 and the first end of the seventh diode VD7 are respectively connected to the rotation speed signal input end, the second end of the sixth diode VD6 is connected to the positive input end of the third operational amplifier U4A through the forty-ninth resistor R49, and the second end of the seventh diode VD7 is grounded; the positive input end of the third operational amplifier U4A is grounded (AGND) through the forty-eighth resistor R48, and the twenty-fifth capacitor C25 is connected in parallel with the forty-eighth resistor R48; the negative input end of the third operational amplifier U4A is grounded through the fifty-eighth resistor R58, the sixty-second resistor R60 is connected between the negative input end and the output end of the third operational amplifier U4A, and the thirty-third capacitor C33 is connected in parallel with the sixty-second resistor R60; the output end of the third operational amplifier U4A is connected to the positive input end of the timer U4B through the thirty-first capacitor C31, the first end of the sixty-second resistor R62 is connected to the positive input end of the timer U4B, and the second end of the sixty-second resistor R62 is grounded; the negative input end of the timer U4B is connected to its output end through the sixty-third resistor R63, and the output end of the timer U4B is connected to the negative input end of the comparator U6 through the sixty-first resistor R61.

[0077] The thirty-second capacitor C32 is connected between the positive input and the negative input of the comparator U6, the positive input of the comparator U6 is connected to the power supply voltage (+15V_A) through the fifty-seventh resistor R57 and the fiftieth resistor R50 in turn, the first end of the fifty-fourth resistor R54 is connected to the fiftieth resistor R50, and the second end of the fifty-fourth resistor R54 is connected to the output of the comparator U6; the third pin of the operational chip U5 is connected to the output of the comparator U6, and the second pin of the operational chip U5 is connected to the power supply voltage through the fifty-fifth resistor R55; the thirtieth capacitor C30 is connected between the second pin and the third pin of the operational chip U5, the first end of the fifty-ninth resistor R59 is connected to the power supply voltage, and the second end of the fifty-ninth resistor R59 is connected to the third pin of the operational chip U5; the sixth pin of the operational chip U5 outputs a digital speed signal, the twenty-ninth capacitor C29 is connected to the sixth pin of the operational chip U5, and the fifty-sixth resistor R56 is connected to the twenty-ninth capacitor C29 in parallel.

[0078] As shown in Figure 4 the embodiment, for the power supply part: there are ±15V power supply inputs in the circuit, marked as +15V_A and -15V_A respectively. These power supplies are connected and filtered through resistors and capacitors. For example, +15V_A is connected to C25 through R48, and then connected to AGND (analog ground) through R49 and R50, which plays the role of power supply filtering and voltage division. -15V_A is connected to AGND through R52 to ensure stable power supply.

[0079] For the signal input part: the input signal of the speed sensor is input from the "FI" port on the right. The signal is processed through a series of elements, including resistors, capacitors and amplifiers, etc. The input signal first passes through diode VD6 for one-way conduction to block reverse voltage damage to the sensor, and then enters the circuit through R49 and R58, and then undergoes subsequent processing and amplification.

[0080] For the main function circuit part: amplifier (U5, i.e. operational chip U5); the input signal enters the amplifier U5 (operational amplifier) after passing through C30. The power supply pins (VCC and VE) of the amplifier U5 are connected to +5V to ensure its normal operation. The output of the amplifier U5 is connected to the subsequent circuit through R52 and C29, which plays the role of amplification and filtering. Comparator U6 circuit (U6): the output of the comparator U6 is connected to the input of the amplifier U5 and a reference voltage (set by R61 and R62), which is used for converting analog signals into digital signals or comparing signals. Frequency generating circuit (U4B): U4B is a timer U4B or oscillator, which generates a 0.053Hz low-frequency signal for timing or controlling other circuits.

[0081] For the output part: the output end of the circuit is on the left side, and there is a "speed" output port. The output signal is output from the "speed" port after being processed by the amplifier U5 and other related elements. This circuit receives signals from the "speed input" port on the right side, processes the signals through amplifiers, comparators U6 and frequency generating circuits, and outputs the processed signals from the "speed" port on the left side. The power supply part provides stable ±15V power supply for the entire circuit, ensuring the normal operation of each element.

[0082] The frequency spectrum diagram of the vibration of the circulating water pump of a certain nuclear power plant measured by the nuclear power plant portable rotating machinery vibration analysis device is as shown in the following figure. Figure 5

[0083] The nuclear power plant portable rotating machinery vibration analysis device can integrate the upper computer and the acquisition monitoring instrument into one body, has an external size of 400*315*126mm, and can be used by users to quickly and intuitively view and analyze vibration frequency spectrum waveform data from the 15.6-inch liquid crystal display screen. The device is simple to operate and convenient to carry, solves the problem that the traditional online vibration monitoring device must be externally connected with an upper computer to use and view and analyze data, can simultaneously acquire 12-channel vibration data and 1-channel rotating speed data, solves the problems of few measuring channels and great limitation of offline vibration measuring instruments, and is widely applicable.

[0084] The above examples are only for illustrating the technical concept and characteristics of the utility model, and the purpose is to enable those skilled in the art to understand the content of the utility model and implement it accordingly, and cannot limit the protection scope of the utility model. Any equivalent changes and modifications made within the scope of the claims of the utility model should belong to the scope of the claims of the utility model.​

Claims

1. A portable rotating machinery vibration analysis device for nuclear power plants, characterized in that, include: Vibration monitoring module, edge computing module, LCD display module, and human-computer interaction module; The input terminal of the vibration monitoring module is connected to the sensor module, and the output terminal of the vibration monitoring module is connected to the edge computing module. The edge computing module is connected to the liquid crystal display module and the human-computer interaction module, respectively. The input terminal of the vibration monitoring module includes multiple acquisition ports, and the sensor module includes multiple vibration sensors and a key phase sensor. The multiple acquisition ports are respectively connected to the multiple vibration sensors and the key phase sensor. The vibration monitoring module is used to acquire the sensing signals output by the sensor module, and after performing analog-to-digital conversion on the sensing signals, output a digital acquisition signal. The edge computing module is used to perform secondary processing on the digital acquisition signal to obtain the vibration monitoring signal, and to analyze and process the vibration monitoring signal to obtain the monitoring data waveform, spectrum and historical curve. The liquid crystal display module is used to output and display any one or more of the vibration monitoring signal, the monitoring data waveform, the spectrum, and the historical curve. The human-computer interaction module is used to generate a trigger signal based on user operation information and send the trigger signal to the edge computing module.

2. The portable rotating machinery vibration analysis device for nuclear power plants according to claim 1, characterized in that, Also includes: Battery module and push-button switch module; The battery module is connected to an external power source and is used to convert the power supplied by the external power source into internal power. The push-button switch module is connected to the battery module and is used to control the power supply of the system.

3. The portable rotating machinery vibration analysis device for nuclear power plants according to claim 2, characterized in that, Also includes: Boost module and cooling fan module; The input terminal of the boost module is connected to the push-button switch module, the output terminal of the boost module is connected to the vibration monitoring module and the edge computing module respectively, and the cooling fan module is connected to the push-button switch module; The boost module is used to boost the internal power output from the battery module to obtain the operating voltage for the vibration monitoring module and the edge computing module to work. The cooling fan module is used to dissipate heat from the system.

4. The portable rotating machinery vibration analysis device for nuclear power plants according to claim 2, characterized in that, The push-button switch module includes: an illuminated self-locking reset switch; The illuminated self-locking reset switch is used to control the on / off state of the system's electrical power.

5. The portable rotating machinery vibration analysis device for nuclear power plants according to claim 1, characterized in that, The human-computer interaction module includes: a keyboard and a capacitive touchpad; The keyboard and the capacitive touchpad are respectively connected to the edge computing module and are used to generate trigger signals based on user operation information and send the trigger signals to the edge computing module.

6. The portable rotating machinery vibration analysis device for nuclear power plants according to any one of claims 1-5, characterized in that, The vibration monitoring module uses an ARM+FPGA dual-core high-speed AD mode for signal acquisition.

7. The portable rotating machinery vibration analysis device for nuclear power plants according to claim 6, characterized in that, The vibration monitoring module includes: multiple vibration acquisition channels and one rotation speed acquisition channel; the multiple acquisition ports include: multiple vibration acquisition ports and one rotation speed acquisition port; The speed acquisition channel is connected to the speed acquisition port, and the plurality of vibration acquisition channels are respectively connected to the plurality of vibration acquisition ports; The plurality of vibration acquisition channels are used to acquire vibration sensing signals, and the single rotation speed acquisition channel is used to acquire rotation speed sensing signals.

8. The portable rotating machinery vibration analysis device for nuclear power plants according to claim 7, characterized in that, The vibration monitoring module includes: multiple vibration acquisition circuits and a rotational speed acquisition circuit; The plurality of vibration acquisition circuits are configured corresponding to the plurality of vibration acquisition channels. Each vibration acquisition circuit is used to perform analog-to-digital conversion processing on the received vibration sensing signal and output a digital vibration signal. The speed acquisition circuit is configured correspondingly to the speed acquisition channel. The speed acquisition circuit is used to perform analog-to-digital conversion processing on the received speed sensing signal and output a digital speed signal.

9. The portable rotating machinery vibration analysis device for nuclear power plants according to claim 8, characterized in that, Each of the vibration acquisition circuits includes: a switch control terminal, a third diode, a forty-first resistor, a forty-fifth resistor, a forty-seventh resistor, a second diode, a fourth diode, a thirty-ninth resistor, a twenty-first capacitor, a first operational amplifier, a forty-sixth resistor, a twenty-fourth capacitor, a forty-second resistor, a forty-fourth resistor, a fortyth resistor, a second operational amplifier, and a forty-third resistor; The switch control terminal is connected to the power supply input terminal. The third diode is connected between the positive signal input terminal and the negative signal input terminal. The positive input terminal of the first operational amplifier is connected to the positive signal input terminal through the forty-first resistor. The negative input terminal of the first operational amplifier is connected to the negative signal input terminal through the forty-fifth resistor. The second diode and the fourth diode are connected in series between the positive and negative input terminals of the first operational amplifier. The thirty-ninth resistor is connected in parallel between the positive input terminal of the first operational amplifier and ground, and the twenty-first capacitor is connected in parallel with the thirty-ninth resistor; the first end of the forty-seventh resistor is connected to the negative input terminal of the signal, and the second end of the forty-seventh resistor is grounded; the forty-sixth resistor is connected between the negative input terminal and the output terminal of the first operational amplifier, and the twenty-fourth capacitor is connected in parallel with the forty-sixth resistor; The output terminal of the first operational amplifier is connected to the negative input terminal of the second operational amplifier through the forty-second resistor, and the positive input terminal of the second operational amplifier is grounded through the forty-fourth resistor; the output terminal of the second operational amplifier outputs the digital vibration signal through the forty-third resistor, and the fortieth resistor is connected between the negative input terminal and the output terminal of the second operational amplifier.

10. The portable rotating machinery vibration analysis device for nuclear power plants according to claim 8, characterized in that, The rotation speed acquisition circuit includes: a sixth diode, a seventh diode, a forty-ninth resistor, a forty-eighth resistor, a twenty-fifth capacitor, a fifty-eighth resistor, a third operational amplifier, a sixtieth resistor, a thirty-third capacitor, a thirty-first capacitor, a timer, a sixty-second resistor, a sixty-first resistor, a sixty-third resistor, a thirty-second capacitor, a comparator, a fifty-seventh resistor, a fiftieth resistor, a fifty-fourth resistor, a fifty-fifth resistor, a thirtyth capacitor, a fifty-ninth resistor, a twenty-ninth capacitor, a fifty-sixth resistor, and an operational chip; The first terminals of the sixth diode and the seventh diode are respectively connected to the speed signal input terminal. The second terminal of the sixth diode is connected to the positive input terminal of the third operational amplifier through the forty-ninth resistor, and the second terminal of the seventh diode is grounded. The positive input terminal of the third operational amplifier is grounded through the forty-eighth resistor, and the twenty-fifth capacitor is connected in parallel with the forty-eighth resistor. The negative input terminal of the third operational amplifier is grounded through the fifty-eighth resistor, and the sixtieth resistor is connected between the negative input terminal and the output terminal of the third operational amplifier. The thirty-third capacitor is connected in parallel with the sixtieth resistor. The output of the third operational amplifier is connected to the positive input of the timer through the thirty-first capacitor; the first end of the sixty-second resistor is connected to the positive input of the timer; and the second end of the sixty-second resistor is grounded. The negative input of the timer is connected to its output through the sixty-third resistor; and the output of the timer is connected to the negative input of the comparator through the sixty-first resistor. The thirty-second capacitor is connected between the positive and negative input terminals of the comparator. The positive input terminal of the comparator is connected to the power supply voltage through the fifty-seventh resistor and the fiftieth resistor in sequence. The first end of the fifty-fourth resistor is connected to the fiftieth resistor, and the second end of the fifty-fourth resistor is connected to the output terminal of the comparator. The third pin of the arithmetic chip is connected to the output of the comparator, and the second pin of the arithmetic chip is connected to the power supply voltage through the fifty-fifth resistor; the thirtieth capacitor is connected between the second and third pins of the arithmetic chip, the first end of the fifty-ninth resistor is connected to the power supply voltage, and the second end of the fifty-ninth resistor is connected to the third pin of the arithmetic chip; the sixth pin of the arithmetic chip outputs the digital speed signal, the twenty-ninth capacitor is connected to the sixth pin of the arithmetic chip, and the fifty-sixth resistor is connected in parallel with the twenty-ninth capacitor.

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