Alarm device and method for unbalance of hoisting vehicle based on voiceprint detection

Abstract

The application discloses a kind of alarm device and method of hoisting vehicle imbalance based on voiceprint detection, by the electromagnetic coil of voiceprint probe current is connected, to trigger magnetic billiard ball impact outrigger of hoisting vehicle, the voiceprint generated by detecting the vibration of outrigger, and by judging whether voiceprint exceeds preset voiceprint range to determine the stress condition of outrigger.Therefore, the unbalanced situation of the stress of outrigger can be detected, and the effect of early warning for hoisting vehicle is played.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hoisting imbalance alarm, in particular to a hoisting vehicle imbalance alarm device and method based on voiceprint detection. BACKGROUND

[0002] At present, hoisting vehicles are widely used in various construction sites, and are also widely used in the overhaul, technical transformation, inspection, and defect elimination of power equipment. Common hoisting vehicles usually include outriggers, and the number of outriggers is four or more than four.

[0003] Before hoisting, the outriggers need to be extended to support the weight of the vehicle so that the wheels are off the ground. At this time, it is required that the four vehicle outriggers are balanced and extended so that the vehicle remains horizontal, and the four outriggers are balanced in bearing. If the vehicle support is not horizontal, the four outriggers will be unbalanced in bearing, and when the situation is serious, some outriggers will not bear or even be off the ground. Similarly, if the hoisted object is too heavy, or the weight exceeds the limit of the outrigger during the extension of the hoisting arm, the vehicle outriggers will also be off the ground, which will cause safety hazards during hoisting. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a hoisting vehicle imbalance alarm device and method based on voiceprint detection, which can alarm the imbalance of the hoisting vehicle and improve the safety of the hoisting vehicle.

[0005] To solve the above technical problems, the technical scheme adopted by the present application is as follows: A hoisting vehicle imbalance alarm device based on voiceprint detection, comprising a signal processing device and a plurality of voiceprint probes, wherein the voiceprint probes are connected with the signal processing device;

[0006] The voiceprint probe comprises a magnetic striker and an electromagnetic coil, the magnetic striker is located in a striker tunnel penetratingly arranged in the voiceprint probe, and the electromagnetic coil is arranged around the magnetic striker;

[0007] The voiceprint probe further comprises a voiceprint detection device, and the voiceprint detection device is connected with the signal processing device;

[0008] The voiceprint probe is arranged on the outrigger of the hoisting vehicle, and the magnetic striker of the voiceprint probe is arranged towards the outrigger.

[0009] To solve the above technical problems, another technical scheme adopted by the present application is as follows:

[0010] A hoisting vehicle imbalance alarm method based on voiceprint detection, applied to the hoisting vehicle imbalance alarm device based on voiceprint detection, comprising the following steps:

[0011] Connect current to the electromagnetic coil of the voiceprint probe, push the magnetic striker to hit the outrigger of the hoisting vehicle through the electromagnetic coil;

[0012] Collect the vibration sound generated by the hit of the outrigger through the voiceprint detection device of the voiceprint probe, and send the collected sound to the signal processing device;

[0013] Determine the frequency and amplitude of the collected sound through the signal processing device, and judge whether the frequency and amplitude exceed the preset voiceprint range, if yes, alarm.

[0014] The beneficial effects of the present application are that by connecting current to the electromagnetic coil of the voiceprint probe, the magnetic striker is triggered to hit the outrigger of the hoisting vehicle, the voiceprint generated by the vibration of the outrigger is detected, and the stress condition of the outrigger is determined by judging whether the voiceprint exceeds the preset voiceprint range. Therefore, the unbalanced condition of the outrigger stress can be detected, and the effect of early warning of the hoisting vehicle is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural diagram of an alarm device for imbalance of hoisting vehicle based on voiceprint detection according to an embodiment of the present application;

[0016] Figure 2 It is a flowchart of an alarm method for imbalance of hoisting vehicle based on voiceprint detection according to an embodiment of the present application;

[0017] Figure 3 It is a structural diagram of a voiceprint probe according to an embodiment of the present application;

[0018] Figure 4 It is a structural diagram of an information processing device according to an embodiment of the present application;

[0019] Figure 5 It is a position schematic diagram of a voiceprint probe according to an embodiment of the present application;

[0020] Figure 6 It is a voiceprint waveform diagram of the outrigger off the ground and not off the ground according to an embodiment of the present application.

[0021] Label explanation:

[0022] 1, voiceprint probe; 2, signal processing device; 3, magnetic striker; 4, electromagnetic coil; 5, striker tunnel; 6, voiceprint detection device; 7, wireless communication antenna; 8, wired communication line; 9, outrigger; 10, hoisting vehicle; 11, antenna; 12, display screen; 13, prompt light; 14, function button; 15, wired communication interface. DETAILED DESCRIPTION

[0023] To explain the technical content, achieved purposes and effects of the present application in detail, the following will be described in combination with embodiments and with the aid of the drawings.

[0024] Please refer to Figure 1 The embodiment of the present application provides a kind of alarm device of hoist vehicle imbalance based on voiceprint detection, including signal processing device and multiple voiceprint probes, the voiceprint probe is connected with the signal processing device;

[0025] The voiceprint probe includes magnetic bouncer and electromagnetic coil, the magnetic bouncer is located in the bouncer tunnel that is arranged through in the voiceprint probe, the electromagnetic coil is arranged around the magnetic bouncer;

[0026] The voiceprint probe further includes voiceprint detection device, and the voiceprint detection device is connected with the signal processing device;

[0027] The voiceprint probe is used to be arranged on the outrigger of hoist vehicle, and the magnetic bouncer of the voiceprint probe is arranged towards the outrigger.

[0028] From the above description, the beneficial effects of the present application are that by connecting current to the electromagnetic coil of the voiceprint probe, the magnetic bouncer is triggered to hit the outrigger of the hoist vehicle, the voiceprint generated by the vibration of the outrigger is detected, and the stress condition of the outrigger is determined by judging whether the voiceprint exceeds the preset voiceprint range.Therefore, the unbalanced condition of the outrigger stress can be detected, and the effect of early warning for the hoist vehicle is achieved.

[0029] Further, the voiceprint probe further includes wireless communication antenna and wired communication line;

[0030] The voiceprint detection device is connected with the signal processing device in communication through the wireless communication antenna;

[0031] The voiceprint probe is connected with the signal processing device through the wired communication line.

[0032] From the above description, the voiceprint probe can be connected with the signal processing device in wired or wireless manner, providing two information transmission modes, and the information transmission mode can be flexibly switched.

[0033] Further, the signal processing device includes control unit, display unit and alarm unit;

[0034] The display unit and the alarm unit are connected with the control unit;

[0035] The display unit is used to display the voiceprint waveform transmitted by the voiceprint detection device.

[0036] From the above description, the sound information collected in the signal processing device is processed, and the processing result is displayed and alarmed, so as to realize the alarm of hoist vehicle imbalance.

[0037] Please refer toFigure 2 A method for alarming imbalance of a lifting vehicle based on voiceprint detection, applied to the above-mentioned device for alarming imbalance of a lifting vehicle based on voiceprint detection, comprising the steps of:

[0038] Turning on current to the electromagnetic coil of the voiceprint probe, and pushing the magnetic striker to hit the outrigger of the lifting vehicle through the electromagnetic coil;

[0039] Collecting the vibration sound generated by the hit of the outrigger through the voiceprint detection device of the voiceprint probe, and sending the collected sound to the signal processing device;

[0040] Determining the frequency and amplitude of the collected sound through the signal processing device, and judging whether the frequency and amplitude exceed the preset voiceprint range, and if so, alarming.

[0041] As can be seen from the above description, by turning on current to the electromagnetic coil of the voiceprint probe, the magnetic striker is triggered to hit the outrigger of the lifting vehicle, the voiceprint generated by the vibration of the outrigger is detected, and the stress condition of the outrigger is determined by judging whether the voiceprint exceeds the preset voiceprint range. Therefore, the unbalanced condition of the outrigger stress can be detected, and the effect of early warning of the overturning of the lifting vehicle is achieved.

[0042] Further, pushing the magnetic striker to hit the outrigger of the lifting vehicle through the electromagnetic coil comprises:

[0043] By adjusting the direction of the current turned on to the electromagnetic coil, the magnetic striker is made to approach or move away from the outrigger of the lifting vehicle.

[0044] As can be seen from the above description, by adjusting the direction of the current, the magnetic striker can be pushed in and pushed out, so that the outrigger vibrates and makes sound.

[0045] Further, before judging whether the frequency and amplitude exceed the preset voiceprint range, it comprises:

[0046] When the outrigger is fixed at both ends, the magnetic striker is pushed to hit the outrigger of the lifting vehicle through the electromagnetic coil, the frequency and amplitude of the sound collected by the voiceprint detection device are determined through the signal processing device, the preset waveform is obtained, and the preset voiceprint range is determined based on the preset waveform.

[0047] As can be seen from the above description, the preset waveform of the foundation is collected when the outrigger is uniformly stressed, and the sound waveform of the outrigger of the lifting vehicle is judged to be balanced or not based on the preset waveform through subsequent longitudinal comparison.

[0048] Further, it further comprises:

[0049] The signal processing device simultaneously collects sound information of all outriggers of the hoisting vehicle, compares the sound information of all outriggers, and if the difference of the sound information between all outriggers exceeds a threshold value, an alarm is given.

[0050] From the above description, it can be seen that multiple outriggers of a hoisting vehicle are simultaneously detected, and the voiceprint information of each outrigger is compared horizontally. The hoisting vehicle can also be judged to be in a balanced state in combination with the result of longitudinal comparison.

[0051] Further, the signal processing device determines the frequency and amplitude of the collected sound after the signal processing device determines the frequency and amplitude of the collected sound.

[0052] The frequency and amplitude of the collected sound are displayed on the display unit of the signal processing device.

[0053] From the above description, it can be seen that the collected sound information is processed in the signal processing device, and the processing result is displayed, so that the imbalance of the hoisting vehicle is detected in real time and intuitively.

[0054] The above-mentioned alarm device and method for imbalance of hoisting vehicle based on voiceprint detection are suitable for detecting and alarming the imbalance of hoisting vehicle, and the following will be described through specific embodiments:

[0055] Embodiment one

[0056] Please refer to Figure 1 An alarm device for imbalance of hoisting vehicle based on voiceprint detection, comprising a signal processing device 2 and a plurality of voiceprint probes 1, the voiceprint probe 1 is connected with the signal processing device 2 through a wired communication line 8;

[0057] The voiceprint probe 1 comprises a magnetic striker 3 and an electromagnetic coil 4, the magnetic striker 3 is located in the striker tunnel 5 penetratingly arranged in the voiceprint probe 1, and the electromagnetic coil 4 is arranged around the magnetic striker 3, the voiceprint probe 1 is arranged on the outrigger 9 of the hoisting vehicle 10, and the magnetic striker 3 of the voiceprint probe 1 is arranged towards the outrigger 9.

[0058] The voiceprint probe 1 further comprises a voiceprint detection device 6, the voiceprint detection device 6 is connected with the signal processing device 2 through a wireless communication antenna 7; the signal processing device 2 comprises a control unit, a display unit and an alarm unit, and the display unit and the alarm unit are connected with the control unit.

[0059] In this embodiment, if the hoisted object of the hoisting vehicle 10 is too heavy, or the weight exceeds the limit of the horizontal holding of the outrigger 9 during the extension of the hoisting arm, the vehicle part of the outrigger 9 will be off the ground. When the outrigger 9 is under load, the upper and lower ends of the outrigger 9 are fixed, and the vibration frequency of the outrigger 9 is high and the amplitude is low when the outrigger 9 is impacted; after the load of the outrigger 9 is reduced or even off the ground, the upper end of the outrigger 9 is fixed and the lower end is suspended, and the vibration frequency of the outrigger 9 is low and the amplitude is high when the outrigger 9 is impacted.

[0060] Therefore, the alarm device of the embodiment comprises a voiceprint probe 1 and a signal processing device (MCU) 2. The voiceprint probe 1 is used to issue an impact and detect a vibration voiceprint, and the MCU is used to collect a voiceprint signal, display and issue an alarm after processing.

[0061] Specifically, please refer to Figure 3 The voiceprint probe 1 comprises an impact unit and a voiceprint detection device 6. The impact unit comprises a magnetic impactor 3 and an electromagnetic coil 4. By connecting current to the electromagnetic coil 4, the magnetic impactor 3 in the middle can be pushed, and changing the direction of the current can realize the pushing in and out of the impactor. The voiceprint detection device 6 is a high-precision microphone for detecting the sound emitted when the outrigger 9 vibrates. The voiceprint probe 1 further comprises a wired connection and a wireless communication module for communication with the signal processing device 2.

[0062] Please refer to Figure 4 The control unit of the signal processing device 2 comprises a function button 14; the display unit comprises a display screen 12; the alarm unit comprises a prompt light 13; and the signal processing device 2 further comprises an antenna 11 and a wired communication interface 15. The antenna 11 is used to receive the signal of the wireless connection probe, and the wired communication interface 15 is used to connect and receive the signal of the wired probe. The display screen 12 can display the real-time waveform of each voiceprint probe 1 and perform function setting. The prompt light 13 is used to prompt the working state, and the green light indicates that the device is working, the yellow light indicates that attention should be paid, and the red light indicates that the device is alarming. When the device alarms, it will emit an alarm sound.

[0063] Please refer to Figure 1 and Figure 5 In use, the voiceprint probe 1 is installed on each outrigger 9 and connected to the MCU through a wired or wireless connection.

[0064] Embodiment Two

[0065] Please refer to Figure 2 A voiceprint detection-based alarm method for the imbalance of a hoisting vehicle, applied to the voiceprint detection-based alarm device for the imbalance of a hoisting vehicle in Embodiment One, comprising the following steps:

[0066] S1, connect current to the electromagnetic coil 4 of the voiceprint probe 1, and push the magnetic impactor 3 to impact the outrigger 9 of the hoisting vehicle 10 through the electromagnetic coil 4.

[0067] Specifically, by adjusting the current direction of the electromagnetic coil 4, the magnetic striker 3 is made to approach or move away from the outrigger 9 of the lifting vehicle 10.

[0068] S2, the vibration sound generated by the impact on the outrigger 9 is collected by the voiceprint detection device 6 of the voiceprint probe 1, and the collected sound is sent to the signal processing device 2.

[0069] Specifically, the voiceprint probe 1 is used to impact the outrigger 9 at a fixed time interval, so that the outrigger 9 responds to the impact and then generates vibration sound. By collecting and filtering the sound, the signal voiceprint can be compared and analyzed to infer the different states of the outrigger 9.

[0070] One end of the outrigger 9 of the lifting vehicle 10 is fixed to the vehicle chassis, and the other end is fixed in a state that changes with the use scene.

[0071] Scene 1: When the four outriggers 9 of the lifting vehicle 10 are balanced, each outrigger 9 is sufficient to bear the force, and the other end of the outrigger 9 is in reliable contact with the ground. The static friction force is large, and it can be considered as fixed. At this time, the outrigger 9 is double-ended fixed.

[0072] Scene 2: When the lifting vehicle 10 is subjected to unilateral overload, the four outriggers 9 are not balanced, and at least one side of the outrigger 9 is not subjected to force in severe cases. At this time, one end of the outrigger 9 is fixed, and the other end is not fixed.

[0073] For scene 1, the outrigger 9 can be analyzed according to the lateral excitation response model of the double-ended fixed metal rod; for scene 2, the analysis can be performed according to the lateral excitation response model of the cantilever beam.

[0074] For a double-ended fixed metal rod, the voiceprint emitted after being impacted is mainly derived from the vibration caused by the elastic deformation of the metal shell. The vibration frequency is high, and the amplitude is low. For a cantilever beam, under the condition of the same length, the voiceprint will superimpose a voiceprint of the overall swing of the cantilever beam in addition to the approximate components of the aforementioned metal rod. The frequency component of the voiceprint is significantly lower than the former, and the amplitude is significantly higher than the former.

[0075] In fact, for most wheeled lifting vehicles 10, the outrigger 9 includes a transversely extending part and a longitudinally extending part. The longitudinal extension part of the outrigger 9 is connected to the chassis with a loose transversely extending part, such as Figure 5Due to the structure, there is a certain swing space. This swing space is often offset by the gradually increasing friction of the contact surface after the support leg 9 bears the longitudinal force. In summary, the natural vibration frequency model of the support leg 9 of the hoisting vehicle 10 in the a direction will even develop from the cantilever beam to the single-end-restricted free metal rod during the process of force reduction to gradually off the ground. At this time, the superimposed soundprint component with low frequency and high amplitude will be more obvious.

[0076] During subsequent device operation, by collecting sound signals and performing Fourier decomposition on the signals, the frequency components and amplitude changes of the signals can be compared to develop early warning strategies. For example, after determining the basic soundprint, if the change in the frequency component of the low frequency band exceeds 10% for a long time, an alarm will be issued. Manufacturers can conduct targeted research on different models of hoisting vehicles 10, so that the alarm strategy will be more targeted.

[0077] S3, determine the frequency and amplitude of the collected sound through the signal processing device 2, and determine whether the frequency and amplitude exceed the preset soundprint range. If so, an alarm will be issued.

[0078] Among them, when the support leg 9 is double-end fixed, the magnetic coil 4 pushes the magnetic striker 3 to hit the support leg 9 of the hoisting vehicle 10, the signal processing device 2 determines the frequency and amplitude of the sound collected by the soundprint detection device 6, obtains a preset waveform, and determines a preset soundprint range based on the preset waveform.

[0079] It also includes: simultaneously collecting sound information of all support legs 9 of the hoisting vehicle 10 through the signal processing device 2, comparing the sound information of all support legs 9, and if the difference between the sound information of all support legs 9 exceeds a threshold value, an alarm will be issued.

[0080] In this embodiment, please refer to Figure 6 When the support leg 9 is under low stress or off the ground, the soundprint detected by the soundprint probe 1 will change, that is, under Fourier analysis, components appear in the low frequency band.

[0081] The device can adopt two alarm working modes:

[0082] Mode 1 is a longitudinal contrast mode (main alarm): when the device is in use, the sound of the legs 9 is first detected, that is, the magnetic coil 4 controls the impact of the impactor to generate an impact, and the sound wave is recorded at the same time. The sound wave is determined as the basis waveform, and the sound fingerprint is recorded, including the peak-to-valley number per unit time, the average frequency, the maximum and minimum amplitude, etc. (At this time, each leg 9 should fully bear the weight of the vehicle). By giving each data a range value, the range of the approximate basis sound fingerprint is obtained. After determining the basis waveform, the device will continuously generate impact signals at fixed time intervals, and record the sound fingerprint in the impact signal interval. When the sound fingerprint deviates from the basis sound fingerprint range for a long time, the device will give an attention signal. When the sound fingerprint is found to change dramatically in each frequency band component, the device will alarm. If the sound fingerprint returns to the basis sound fingerprint range, the alarm or attention prompt will be automatically released. This mode is suitable for when the work of the hoisting vehicle 10 is completed, and each leg 9 is reliably stressed.

[0083] Mode 2 is a transverse contrast mode (auxiliary early warning): this mode is used to detect multiple legs 9 of a crane at the same time. Since the shapes of the legs 9 of the same crane are similar, the natural frequency of the double-end fixed metal rod is similar when the legs 9 are reliably stressed, and the sound fingerprint collected by the sound fingerprint probe 1 is also similar. When working, the device detects the sound fingerprint of each sound fingerprint probe 1 for transverse comparison, and when the sound fingerprint of a certain leg, or two legs (usually only these two cases occur) has obvious low-frequency components (others do not), such as when the amplitude sum of a certain frequency band is greater than 15% of the average amplitude of the signal in that frequency band, the device will alarm. This mode is suitable for use in the preparation of the legs 9 of the hoisting vehicle 10 to assist in judging the stress balance of each leg 9. During the lifting process of the hoisting vehicle 10, this mode can also have an auxiliary early warning effect.

[0084] In summary, the alarm device and method for imbalance of a hoisting vehicle based on sound fingerprint detection provided by the present application can detect the imbalance of the stress of the legs by connecting current to the electromagnetic coil of the sound fingerprint probe, thereby triggering the magnetic impactor to impact the legs of the hoisting vehicle, detecting the sound fingerprint generated by the vibration of the legs, and determining the stress of the legs by judging whether the sound fingerprint exceeds the preset sound fingerprint range. Through the transverse and longitudinal contrast modes of the sound fingerprint, early warning of the imbalance of the hoisting vehicle can be performed before and after the preparation of the hoisting vehicle. Therefore, the imbalance of the stress of the legs can be detected, and the effect of early warning of the overturning of the hoisting vehicle is achieved.

[0085] The above description is only an embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent transformation or direct or indirect application in the related technical field based on the content of the specification and drawings of the present application is also included in the patent protection scope of the present application.

Claims

1. A method for alarming unbalance of a hoisting vehicle based on voiceprint detection, applied to an alarm device for unbalance of a hoisting vehicle based on voiceprint detection, characterized in that, The device comprises a signal processing device and a plurality of acoustic fingerprint probes connected with the signal processing device; The acoustic fingerprint probe comprises a magnetic ball and an electromagnetic coil, the magnetic ball is located in the ball tunnel through the acoustic fingerprint probe, and the electromagnetic coil is arranged around the magnetic ball; The acoustic fingerprint probe further comprises an acoustic fingerprint detection device connected with the signal processing device; The acoustic fingerprint probe is arranged on the outrigger of the lifting vehicle, and the magnetic ball of the acoustic fingerprint probe is arranged towards the outrigger; The method comprises the following steps: Current is connected to the electromagnetic coil of the acoustic fingerprint probe, and the magnetic ball is pushed by the electromagnetic coil to hit the outrigger of the lifting vehicle; The vibration sound generated by the hit of the outrigger is collected by the acoustic fingerprint detection device of the acoustic fingerprint probe, and the collected sound is transmitted to the signal processing device; The frequency and amplitude of the collected sound are determined by the signal processing device, and it is judged whether the frequency and amplitude exceed the preset acoustic fingerprint range, if so, an alarm is given; The magnetic ball is pushed by the electromagnetic coil to hit the outrigger of the lifting vehicle, which comprises: By adjusting the direction of the current connected to the electromagnetic coil, the magnetic ball is close to or away from the outrigger of the lifting vehicle; Before judging whether the frequency and amplitude exceed the preset acoustic fingerprint range, it comprises: When the two ends of the outrigger are fixed, the magnetic ball is pushed by the electromagnetic coil to hit the outrigger of the lifting vehicle, the frequency and amplitude of the sound collected by the acoustic fingerprint detection device are determined by the signal processing device, the preset waveform is obtained, and the preset acoustic fingerprint range is determined based on the preset waveform; It further comprises: The sound information of all the outriggers of the lifting vehicle is collected by the signal processing device at the same time, the sound information of all the outriggers is compared, and if the difference between the sound information of all the outriggers exceeds the threshold value, an alarm is given; The device adopts two alarm working modes: Mode 1 is longitudinal comparison mode: when the device is used, the outrigger acoustic fingerprint is detected first, the device continuously gives the hit signal at fixed time interval, and records the acoustic fingerprint in the hit signal interval at the same time; When the acoustic fingerprint deviates from the basic acoustic fingerprint range for a long time, the device gives a warning signal; When the components of each frequency band of the acoustic fingerprint change sharply, the device alarms; Mode 2 is horizontal comparison mode: used in the scene of detecting multiple outriggers of a crane at the same time; When working, the device detects the acoustic fingerprint of each acoustic fingerprint probe for horizontal comparison, and when the acoustic fingerprint of one or two outriggers obviously contains low frequency components, the device alarms.

2. The method of claim 1, wherein the method further comprises: The acoustic fingerprint probe further comprises a wireless communication antenna and a wired communication line; The acoustic fingerprint detection device is in communication connection with the signal processing device through the wireless communication antenna; The acoustic fingerprint probe is connected with the signal processing device through the wired communication line.

3. The method of claim 1, wherein the method further comprises: The signal processing device comprises a control unit, a display unit and an alarm unit; The display unit and the alarm unit are connected with the control unit; The display unit is used to display the acoustic fingerprint waveform transmitted by the acoustic fingerprint detection device.

4. The method of claim 1, wherein the method further comprises: After determining the frequency and amplitude of the collected sound by the signal processing device, it comprises: The frequency and amplitude of the collected sound are displayed in a display unit of the signal processing device.

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