CN109060077B - Equipment for detecting glass water height in water tank by using sound and windshield wiper system - Google Patents
Equipment for detecting glass water height in water tank by using sound and windshield wiper system Download PDFInfo
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- CN109060077B CN109060077B CN201810936032.0A CN201810936032A CN109060077B CN 109060077 B CN109060077 B CN 109060077B CN 201810936032 A CN201810936032 A CN 201810936032A CN 109060077 B CN109060077 B CN 109060077B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
- B60S1/48—Liquid supply therefor
Abstract
The embodiment of the application discloses utilize sound to detect equipment and windshield wiper system of glass water height in water tank, be applied to glass water tank, wherein, check out test set includes microphone module and controller, the controller is used for sending the motor and opens the signal for the motor, the microphone module is used for obtaining the sound signal of glass water when the motor is opened, and send sound signal to the controller, carry out spectral analysis to sound signal by the controller and obtain the frequency of sound signal, obtain the height of the glass water that the frequency of current sound signal corresponds according to the frequency-height function, thereby realize utilizing the sound to detect the height of glass water in the water tank, and then make the driver can in time learn the glass water height, before glass water is used up, replenish glass water.
Description
Technical Field
The invention relates to the technical field of water tank monitoring, in particular to equipment for detecting the height of glass water in a water tank by using sound and a windshield wiper system.
Background
The automobile glass water is mainly used for providing a clear visual field for a driver by spraying the glass water and washing the glass water by a windshield wiper when the transparency of the windshield is poor. Especially when driving at night, dust on the windshield can scatter light, and if the dust cannot be cleaned in time, the driver is influenced to make a judgment in time according to the condition of the front road, so that accidents are caused, and the driving safety is reduced.
However, because the water tank of the glass water is limited, the driver needs to replenish the glass water in time when the glass water is about to be used up, and the traffic accident caused by that the glass water is used up and the dust of the windshield cannot be cleaned in time is avoided.
Therefore, the height of the glass water in the water tank needs to be detected, and when the glass water is used up, the glass water is not supplemented in time to influence the driving experience.
Disclosure of Invention
In order to solve the technical problems in the prior art, the embodiment of the invention provides equipment for detecting the height of glass water in a water tank by using sound and a windshield wiper system, which can accurately detect the height of the glass water in time, and further remind a driver to replenish the glass water in time before the glass water is used up, so that the driving experience is improved.
In order to solve the above problem, a first aspect of the embodiments of the present application provides an apparatus for detecting a height of glass water in a water tank by using sound, which is applied to the glass water tank, the apparatus including: a microphone module and a controller;
the glass water tank is used for containing glass water;
the glass water tank is connected with a windshield wiper;
the glass water tank also comprises a motor, and the motor is used for driving the glass water in the glass water tank to be sprayed out of the windshield wiper;
the controller is used for sending a motor starting signal to the motor;
the microphone module is used for obtaining sound signals of the glass water when the motor is started;
the controller is used for carrying out spectrum analysis on the sound signal to obtain the frequency of the sound signal, and obtaining the height of the glass water corresponding to the frequency of the sound signal through a frequency-height function; the frequency-height function is obtained experimentally in advance.
Optionally, the apparatus further comprises: a current detection circuit;
the current detection circuit is used for obtaining the working current of the motor;
the controller is also used for obtaining the height of the glass water corresponding to the working current of the motor through a current-height function; the current-height function is obtained in advance through experiments; and when the difference between the height of the glass water corresponding to the frequency and the height of the glass water corresponding to the working current is not within a first preset height range, judging the motor fault.
Optionally, the controller is further configured to obtain a sum of operating times of the motors; obtaining the height of the glass water corresponding to the current working time of the motor according to a time-height function; the time-height function is obtained by experiment in advance;
the controller is also used for judging that the windshield wiper pipeline is blocked when the difference between the height of the molten glass corresponding to the frequency and the height of the molten glass corresponding to the working time is larger than a second preset height range;
and when the difference between the glass water height corresponding to the working current and the glass water height corresponding to the working time is smaller than a third preset height range, judging that the glass water tank leaks.
Optionally, before performing spectrum analysis on the sound signal to obtain the frequency of the sound signal, the controller is further configured to screen a sound segment signal from the sound signal, where the sound segment signal is located between a time when the controller sends a motor turn-on signal to the motor and a time when the controller sends a motor turn-off signal to the motor.
Optionally, the microphone module is further configured to obtain a background sound signal in advance when the motor is not turned on, and send the background sound signal to the controller;
the controller is further configured to subtract the background sound signal from the sound signal before performing a spectral analysis on the sound signal to obtain a frequency of the sound signal.
Optionally, the microphone module obtains a background sound signal in advance when the motor is not turned on, specifically:
the microphone module obtains a background sound signal when the motor is not started for multiple times in advance, and sends the obtained background sound signal for multiple times to the controller;
the controller averages the background sound signals obtained for multiple times to serve as a final background sound signal;
the controller subtracts the background sound signal from the sound signal, specifically:
the controller subtracts the final background sound signal from the sound signal.
Optionally, the frequency-height function is obtained in advance through experiments, and specifically includes:
obtaining test data of the frequency corresponding to the sound signal and the height of the glass water for multiple times in advance;
and performing curve fitting according to the test data to obtain the frequency-height function.
Optionally, when the glass water tank is judged to leak, the controller predicts the time required for the glass water to leak according to the current height of the glass water in the glass water tank and the height of the glass water in the glass water tank, which is reduced due to the leakage, in unit time, so as to remind a driver according to the time required for the glass water to leak.
Optionally, the controller sets a unique ID for the motor, and the controller sets a unique ID for the wiper;
the controller sends the motor starting signal to the motor through the ID of the motor, and the controller sends a wiper starting signal to the wiper through the ID of the wiper; when the motor is started, the glass water is driven to the windshield wiper to be sprayed out.
Optionally, the controller is located in the vehicle or at a remote server.
Optionally, the device further comprises a remote server;
the controller is further used for sending the sound signal to the remote server;
the remote server is used for carrying out spectrum analysis on the sound signal through a neural network to obtain the frequency of the sound signal, and obtaining the height of the glass water corresponding to the frequency of the sound signal through a frequency-height function.
In a second aspect of the embodiments of the present application, there is provided a wiper system including the apparatus for detecting a level of molten glass in a water tank by using sound as described in the first aspect, further including: glass water tank, motor and windshield wiper.
Compared with the prior art, the invention has at least the following advantages:
the invention provides a device and a wiper system for detecting the height of glass water in a water tank by using sound, which are applied to the glass water tank, wherein the detection device comprises a microphone module and a controller, the controller is used for sending a motor starting signal to a motor, the microphone module is used for obtaining a sound signal of the glass water when the motor is started and sending the sound signal to the controller, the controller carries out spectrum analysis on the sound signal to obtain the frequency of the sound signal, and the height of the glass water corresponding to the frequency of the current sound signal is obtained according to a frequency-height function, so that the height of the glass water in the water tank is detected by using the sound, a driver can know the height of the glass water in time, and the glass water is supplemented before the glass water is used up.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a block diagram of an apparatus for detecting the level of glass water in a water tank by sound according to an embodiment of the present invention;
FIG. 2A is a block diagram of another apparatus for detecting the level of glass water in a water tank by sound according to an embodiment of the present invention;
fig. 2B is a top view of a microphone module mounting position structure according to an embodiment of the present invention;
fig. 3 is a structural diagram of a wiper system according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to facilitate understanding of the technical solutions provided by the present invention, the following briefly describes the background art of the technical solutions of the present invention.
The inventor finds in research that two methods are commonly used for detecting the glass water level in the glass water tank at present, the first method is that a driver opens a front cover of a vehicle, inserts a chopstick or other measurable objects into the glass water tank, and the submerged part is the current residual glass water level. However, when the glass water level is measured by the method, a user must open the front cover of the vehicle and can measure the glass water level by other objects, and the use experience is influenced.
The second method is to use a float to measure, the measurement operability is poor, and the float is easy to damage, when the float has problems, the measurement result is inaccurate, and the driving experience is influenced.
In addition, glass water belongs to the consumable article in the car use, and when glass water is about to use up, need in time supply, avoid leading to in time not rinsing windshield because of glass water is used up, influence the driving experience.
The inventor researches and discovers that when the motor drives the glass water in the glass water tank to be sprayed out of the windshield wiper, the glass water in the glass water tank generates sound due to vibration, when the glass water in the glass water tank is different in height, the vibration frequency of the glass water is different, and further the generated sound is different, the larger the glass water is, the larger the frequency corresponding to the generated sound signal is, and the direct proportion relationship between the vibration frequency and the generated sound signal is, so that the height of the glass water corresponding to the current sound signal can be obtained according to the sound signal of the glass water.
Based on this, the embodiment of the invention provides a device for detecting the height of glass water in a water tank by using sound, wherein a controller sends an opening signal to a motor to drive the glass water in the glass water tank to be sprayed out of a windshield wiper, a microphone module obtains a sound signal of the glass water and sends the sound signal to the controller, the controller performs frequency spectrum analysis on the sound signal to obtain the frequency of the sound signal, and obtains the height of the glass water corresponding to the frequency of the sound signal according to a frequency-height function, so that a driver can know the height of the glass water in time, the glass water is supplemented before the glass water is used up, the driver does not need to measure the height of the glass water by himself, and the user experience is improved.
Example one
Hereinafter, an apparatus for detecting a glass water level in a water tank using sound according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, a block diagram of an apparatus for detecting a glass water level in a water tank by using sound according to an embodiment of the present invention is shown.
The device provided by the embodiment is applied to a glass water tank 103 for containing glass water; the glass water tank is connected with a wiper 104.
The glass water tank 103 further comprises a motor 105, and the motor 105 is used for driving the glass water in the glass water tank 103 to be sprayed out of the wiper 104.
The apparatus provided by the present embodiment includes a controller 101 and a microphone module 102.
The controller 101 is configured to send a motor start signal to the motor 105.
The microphone module 102 is configured to obtain a sound signal of the glass water when the motor 105 is turned on, and send the sound signal to the controller 101.
The controller 101 is used for performing spectrum analysis on the sound signal to obtain the frequency of the sound signal, and obtaining the height of the glass water corresponding to the frequency of the sound signal through a frequency-height function; the frequency-height function is obtained experimentally in advance.
The controller 101 may be a vehicle controller of an automobile, or may be an independently installed controller.
The microphone module 102 may be disposed on the glass water tank, and when the motor drives the glass water in the glass water tank to be sprayed out from the wiper, the microphone module starts to obtain an acoustic signal of the glass water in the glass water tank until the motor stops driving, and transmits the acoustic signal of the glass water obtained in the above time period to the controller.
In this embodiment, the height of the glass water in the glass water tank is a function of the frequency corresponding to the sound signal, and the frequency-height function is obtained through a plurality of tests in advance. When the controller analyzes the frequency corresponding to the sound signal of the current glass water, the height of the corresponding glass water can be obtained through the function.
In some embodiments, the frequency-height function is obtained experimentally beforehand, in particular: obtaining test data of the frequency corresponding to the sound signal and the height of the glass water for multiple times in advance; and performing curve fitting according to the test data to obtain the frequency-height function.
Curve fitting refers to a data processing method for approximately describing or comparing the functional relationship between coordinates represented by discrete point groups on a plane by using a continuous curve.
The method comprises the steps of testing the glass water height of a glass water tank leaving a factory and the frequency corresponding to a sound signal for multiple times in advance to obtain multiple discrete test data, and performing curve fitting by utilizing the multiple discrete test data to obtain the functional relation between the frequency and the height. For example, the discrete test data obtained in advance are (f0, h0), (f1, h1), (f2, h2), (f3, h3), a scatter diagram is drawn according to the discrete test data, a close and proper curve type is selected according to the distribution characteristics of the scatter, and then a corresponding function is selected according to the fitted curve type to serve as the function of frequency and height.
In some embodiments, the controller may be located in an automobile or may be located in a remote server. When the controller is positioned in the automobile, the controller performs spectrum analysis on the sound signal to obtain the frequency of the sound signal, and the operation of obtaining the corresponding glass water height according to the frequency-height function is performed locally.
When the controller is located at the remote server, the controller sends the received sound signal to the remote server, the remote server performs spectrum analysis according to the received sound signal to obtain the frequency of the sound signal, and the corresponding glass water height is obtained according to the frequency-height function.
It can be understood that, because existing vehicle communication is mostly performed through a SIM card installed on the vehicle, and because the logistics vehicle often runs in the suburbs and the network signal is poor, in order to ensure that the sound signal sent to the remote server by the controller can be accurately received by the remote server, in general, when the logistics vehicle is parked in a garage, the controller sends the received sound signal to the remote server, and the remote server performs operations such as spectrum analysis and the like according to the received sound signal.
It should be noted that the communication method between the vehicle and the remote server may be WIFI, bluetooth, etc., and this embodiment is not limited herein.
In practical application, the neural network can be used for carrying out spectrum analysis on the acquired sound signal, and specifically, the controller is also used for sending the sound signal to the remote server; and the remote server is used for carrying out spectrum analysis on the sound signal through the neural network to obtain the frequency of the sound signal, and obtaining the height of the glass water corresponding to the frequency of the sound signal through a frequency-height function.
In specific implementation, the sound signal of the glass water in the glass water tank during working can be obtained in advance for multiple times, the neural network is trained by utilizing the multiple sound signals, the trained neural network is obtained, and the trained neural network obtains the glass water height corresponding to the sound signal generated in the glass water tank during working, so that the trained neural network can analyze the frequency of the sound signal according to the input sound signal and obtain the glass water height in the current glass water tank according to the frequency and height function.
In some embodiments, the controller is further configured to screen the sound signal for a sound segment between a time when the controller sends the motor-on signal to the motor and a time when the controller sends the motor-off signal to the motor before performing the spectrum analysis on the sound signal to obtain the frequency of the sound signal.
Because the motor starting signal and the motor stopping signal are both sent by the controller, the controller can store the moment of sending the motor starting signal and the moment of sending the motor stopping signal, and screen out the sound fragment signal between the two moments from the received sound signals, so that the controller carries out spectrum analysis on the sound fragment signal to obtain the frequency corresponding to the sound fragment signal, and then obtains the glass water height corresponding to the frequency of the sound fragment signal through a frequency-height function.
It can be understood that, when the sound signal of the glass water is obtained by the microphone module, the background sound signal generated by other parts is not collected, and in order to ensure that the sound signal is judged by the controller, the judged sound signal is the sound signal of the glass water, and the accuracy of subsequent judgment is improved, in this embodiment, before the sound signal is judged by the controller, the noise is removed, and the sound signal collected by the microphone module is filtered.
In some embodiments, the microphone module is further configured to obtain a background sound signal in advance when the motor is not turned on, and send the background sound signal to the controller; the controller is further configured to subtract the background sound signal from the sound signal before performing a spectral analysis on the sound signal to obtain a frequency of the sound signal.
The background sound signal may be a sound signal generated by other parts of the vehicle, and may also be a sound signal generated by other objects.
In this embodiment, a background sound signal may be obtained in advance and stored in the controller, and before the controller performs spectrum analysis on the sound signal, the sound signal sent by the microphone module is subtracted from the pre-stored background sound signal, so as to ensure that the sound signal analyzed by the controller is the sound signal of the glass water, and avoid the influence of the background sound signal on the analysis result, thereby improving the accuracy of detecting the height of the glass water.
In order to ensure that the background sound signal can be removed as much as possible, in some embodiments, the microphone module obtains the background sound signal when the motor is not turned on in advance, specifically: the microphone module obtains background sound signals when the motor is not started for multiple times in advance, and sends the background sound signals obtained for multiple times to the controller; the controller averages the background sound signals obtained for multiple times to serve as a final background sound signal; the controller subtracts the background sound signal from the sound signal, specifically: the controller subtracts the final background sound signal from the sound signal.
In this embodiment, the final background sound signal may be stored in the controller, and before the controller performs spectrum analysis on the sound signal, the final background sound signal may be subtracted from the sound signal to obtain the final sound signal, so that the controller performs spectrum analysis on the final sound signal to obtain the frequency of the final sound signal, and further obtain the height of the molten glass according to the frequency-height function, and the accuracy of obtaining the height of the molten glass is improved by removing the background sound signal.
The specific method for removing the background sound signal may be to eliminate the background sound signal by using different filtering methods according to the characteristics of the background sound signal. For example, the background sound signal exhibits high frequency characteristics, and the background sound signal may be filtered by a low-pass filtering method; the background sound signal exhibits low frequency characteristics and may be filtered using a high pass filtering method. Of course, the removal may also be performed according to other attributes of the background sound signal, and the embodiment is not limited herein.
In order to ensure that a motor opening signal or a motor closing signal sent by the controller can be accurately received by the motor and a wiper opening signal or a budget closing signal sent by the controller can be received by a wiper standard group, the embodiment sets IDs for the motor and the wiper respectively so that the controller sends a signal to the motor or the wiper by using the IDs.
In some embodiments, the controller sets a unique ID for the motor, and the controller sets a unique ID for the wiper; the controller sends the motor starting signal to the motor through the ID of the motor, and the controller sends a wiper starting signal to the wiper through the ID of the wiper; when the motor is started, the glass water is driven to the windshield wiper to be sprayed out.
In this embodiment, the ID of the motor and the ID of the wiper may be stored in the controller in advance, and when the controller needs to send signals to the motor and the wiper respectively, the ID of the motor and the ID of the wiper are obtained, and a motor turn-on signal or a motor turn-off signal is sent to the motor through the ID of the motor; and a wiper opening signal or a wiper closing signal is sent to the wiper through the ID of the wiper, so that the working efficiency is improved.
Through the equipment that utilizes sound to detect glass water height in water tank that this embodiment provided, send the motor turn-on signal for the motor as the controller, so that the glass water in the motor drive glass water tank is spout from the windshield wiper, the microphone module is when the motor is opened, obtain the acoustic signal of glass water in the glass water tank, and send this acoustic signal for the controller, make the controller carry out spectral analysis to this acoustic signal and obtain the frequency of this acoustic signal, obtain the glass water height that this acoustic signal's frequency corresponds by the frequency-height function, and then make the driver can in time learn the glass water height, before glass water is used up, can in time supply glass water, in addition, need not driver oneself to measure the height of glass water, improve user experience.
Example two
The above embodiments describe the components and functions of the apparatus for detecting the level of glass water in a water tank by sound, and the detailed function implementation of the apparatus will be described in detail with reference to the accompanying drawings.
Referring to fig. 2, there is shown a block diagram of another apparatus for detecting the level of glass water in a water tank by sound according to an embodiment of the present invention.
The device provided by the embodiment is applied to the glass water tank 103, wherein the glass water tank 103 is connected with a wiper 104 and comprises a motor 105.
The device provided by the embodiment comprises: a controller 101, a microphone module 102, and a current detection circuit 106.
The number and the installation position of the microphone modules may be set according to actual requirements, and the installation position of the microphone module shown in fig. 2A is only an example, and is not limited to a specific position. If only one microphone module is arranged on the automobile, the microphone module can be arranged on the middle part of the automobile frame; if four microphone modules are installed, four microphone modules may be installed at four corners of the vehicle frame so that sound signals are obtained through the four microphone modules.
For better understanding of the installation position of the microphone module, refer to fig. 2B, which is a top view of a microphone module installation position structure provided by an embodiment of the present invention, in fig. 2B, four microphone modules are included: the microphone module 1021, the microphone module 1022, the microphone module 1023 and the microphone module 1024 are respectively installed at four top corners of the frame, the controller 101 is installed at the middle part of the frame, the four microphone modules can work simultaneously to send obtained sound signals to the controller 101, and the controller 101 can distinguish the sound signals sent by the four different microphone modules according to receiving time delay.
And a current detection circuit 106 for obtaining the operating current of the motor 105.
The controller 101 is further used for obtaining the height of the molten glass corresponding to the working current of the motor through a current-height function; the current-height function is obtained in advance through experiments; and when the difference between the height of the glass water corresponding to the frequency and the height of the glass water corresponding to the working current exceeds a first preset height range, judging the motor fault.
The height of the glass water is a function of the working current of the motor, and when the glass water in the glass water tank is deeper, the motor can ensure that the glass water is sprayed out of the windshield wiper only by the aid of the larger working current; when the glass water is shallow, the glass water can be sprayed out of the windshield wiper by using a small working current of the motor, the required currents are different when the motor works when the heights of the glass water are different, namely the heights of the glass water correspond to the currents one by one.
The current-height function is obtained in advance through a plurality of tests and is stored in the controller, and when the controller obtains the current used when the motor drives the glass water to be sprayed out of the windshield wiper, the current height of the glass water in the glass water tank can be obtained according to the current-height function.
In some embodiments, the current-height function is obtained experimentally beforehand, in particular: obtaining test data of the working current of the electrode and the height of the glass water for multiple times in advance; and performing curve fitting according to the experimental data to obtain the frequency-height function.
The method comprises the steps of testing the glass water height of a glass water tank leaving a factory and the working current of a motor for multiple times in advance to obtain multiple discrete test data, and performing curve fitting by utilizing the multiple discrete test data to obtain the functional relation between the frequency and the height. For example, the discrete test data obtained in advance are (I0, h0), (I1, h1), (I2, h2), (I3, h3), a scatter diagram is drawn according to the discrete test data, a close and proper curve type is selected according to the distribution characteristics of the scatter, and then a corresponding function is selected according to the fitted curve type to serve as the function of the current and the height.
Wherein the first preset height range may be a height difference pre-stored in the controller, the height difference representing a height difference between a height of the molten glass obtained according to the current-height function and a height of the molten glass obtained according to the frequency-height function in a normal operation state of the motor.
When the device is applied specifically, when the difference value between the height of the glass water obtained according to the current and the height of the glass water obtained according to the frequency is within a first preset height range, namely within an allowable error range, the motor works normally, and meanwhile, the accuracy of detecting the height of the glass water in the water tank by using the sound signal can be shown.
If the difference value is not in the first preset height range, because the frequency corresponding to the generated sound signal is known and fixed when the height of the glass water in the glass water tank is constant, errors can not occur between the height of the glass water and the frequency under the general condition, when the height difference value is not in the first preset height range, the error occurs in the glass water height corresponding to the working current, and because the working current corresponds to the glass water height one to one, the problem occurs in the working current, and the motor can be judged to have the fault.
To motor trouble, this embodiment provides when judging motor trouble, reports to the police and reminds to the driver to make the driver in time overhaul the motor. Specifically, when the controller judges the motor fault, the controller controls the alarm component to alarm.
Wherein, the alarm component can be a buzzer, a light emitting diode, or a voice broadcast system and the like.
In some embodiments, the controller is further configured to obtain a sum of the motor operating times; obtaining the height of the glass water corresponding to the current working time of the motor according to a time-height function; the time-height function is obtained experimentally in advance.
The height of the glass water is a function of the discrete working time of the motor, and the height of the residual glass water in the glass water tank can be obtained through the total working time of the motor. For example, the working time for driving the glass water to spray for the first time by using the motor is t0, and the t0 corresponds to the height h0 of the glass water; the working time of driving the glass water to spray for the second time by using the motor is t, and the height h1 of the glass water is t1 which is t0+ t; if the working time of driving the glass water to be sprayed out by the motor for the third time is still t, t2 is t1+ t and corresponds to the height h2 of the glass water, and the working time of the motor is sequentially accumulated, so that the corresponding height of the glass water is obtained.
For obtaining the time-height function, the present embodiment provides two ways, which are described below.
In a first mode, the time-height function is obtained in advance through experiments, and specifically includes: obtaining test data of the working time of the motor and the height of the glass water for multiple times in advance; and performing curve fitting according to the test data to obtain the time-height function.
The method comprises the steps of testing the glass water height of a glass water tank leaving a factory and the working time of a motor for multiple times in advance to obtain multiple discrete test data, and performing curve fitting by utilizing the multiple discrete test data to obtain the functional relation between the frequency and the height. For example, the discrete test data obtained in advance are (t0, h0), (t1, h1), (t2, h2), (t3, h3), a scatter diagram is drawn according to the discrete test data, a close and proper curve type is selected according to the distribution characteristics of the scatter, and then a corresponding function is selected according to the fitted curve type as a function of time and height.
In the second mode, the total volume of the windshield wiper sprayed glass water is obtained according to the sum of the working time of the electrodes and the volume of the windshield wiper sprayed glass water in unit time; obtaining the total height of the glass water sprayed by the windshield wipers according to the bottom area and the total capacity of the glass water tank; obtaining the time-height function from the initial height of the glass water in the glass water tank and the total height.
The shape of the glass water tank on the vehicle is fixed, the volume V for containing the glass water is also fixed, and the initial height h0 of the glass water in the glass water tank is obtained as V/S according to the bottom area S of the glass water tank. For example, if the volume of the windshield wiper spraying the glass water per unit time is C, the total volume C of the sprayed glass water can be obtained according to the working time t of the motor, and the height h1 of the sprayed glass water is C/S; and subtracting the height h1 of the sprayed glass water from the initial height h0 to obtain the height h of the residual glass water in the glass water tank, namely V/S-c t/S, so as to obtain the function of the height of the glass water and the time.
In some embodiments, the controller is further configured to determine that the wiper channel is blocked when it is determined that the difference between the glass water level corresponding to the frequency and the glass water level corresponding to the operating time is greater than a second preset height range.
The second preset height range is a height difference value obtained by making a difference between the height of the glass water obtained by using the frequency-height function and the height of the glass stone obtained by using the time-height function in the normal working state of the wiper pipeline.
When the difference value between the height of the glass water obtained according to the frequency and the height of the glass water obtained according to the time is within a second preset height range, namely within an allowable error range, the normal operation of the wiper pipeline is indicated.
When the difference between the height of the glass water obtained by the controller according to the frequency and the height of the glass water obtained according to the working time is larger than a second preset height range, the windshield wiper pipeline is indicated to be blocked, because when the windshield wiper pipeline is blocked, the height of the glass water sprayed out in the working time of the motor is reduced, namely, when the windshield wiper pipeline works normally in the same working time of the motor, the height of the glass water sprayed out by the windshield wiper is larger than the height of the glass water sprayed out when the windshield wiper pipeline is blocked, therefore, if the height of the glass water in the glass water tank is calculated according to a time-height function, the calculated height value is smaller than the height of the glass water in the actual glass water tank. Because the frequency corresponding to the generated sound signal is known and fixed when the height of the glass water in the glass water tank is constant, errors can not occur between the height of the glass water and the frequency under the general condition, namely the height in the actual glass water tank is the height obtained according to the frequency-height function, and therefore when the difference between the height of the glass water corresponding to the frequency and the height of the glass water corresponding to the working time is larger than a second preset height range, the windshield wiper pipeline is blocked.
In some embodiments, the controller is further configured to determine that the glass water tank leaks when it is determined that a difference between a glass water level corresponding to the operating current and a glass water level corresponding to the operating time is smaller than a third preset height range.
The third preset height range is obtained by making a difference between the height of the glass water obtained by using the current-height function and the height of the glass stone obtained by using the time-height function under the normal working state of the glass water tank.
It should be noted that, in this embodiment, the first preset height threshold, the second preset height threshold, and the third preset height threshold are height differences obtained in advance, and the three preset height thresholds may be equal or unequal, and the specific situation needs to be determined according to an actual measurement result.
When the glass water tank is applied specifically, when the difference value between the glass water height obtained according to the working current and the glass water height obtained according to the time is within a third preset height range, namely within an allowable error range, the glass water tank is indicated to work normally.
When the difference between the glass water height obtained by the controller according to the working current and the glass water height obtained according to the working time is smaller than a third preset height range, the glass water tank is indicated to be leaked, because when the glass water tank is leaked, the glass water is reduced, the resistance is reduced, when the motor drives the glass water to be sprayed out of the windshield wiper, the required working current is smaller, and because of the current-height function obtained in advance, when the current is smaller, the corresponding glass water height is lower. And when the controller calculates the residual glass water height of the glass water tank according to the sum of the working time of the motor, only the glass water height used when the motor is started is considered, but the problem of the glass water leakage height of the glass water tank is not considered, and the calculated glass water height is larger than the actual glass water height, namely the height obtained according to the working current, so that when the difference between the glass water height corresponding to the working current and the glass water height corresponding to the working time is smaller than a third preset height range, the leakage of the glass water tank is indicated.
According to the judgment result, when the glass water tank is judged to leak, the time that the glass water leaks is obtained, and the specific time can be displayed on a vehicle display screen, so that a driver can timely overhaul the glass water tank, and the phenomenon that the windshield cannot be cleaned due to the fact that the glass water leaks is avoided, and the driving experience is influenced.
In some embodiments, when the glass water tank is judged to leak, the time required for the glass water to leak is predicted according to the current height of the glass water in the glass water tank and the height of the glass water in the glass water tank, which is reduced due to the leakage, in unit time, so that a driver is reminded according to the time required for the glass water to leak.
When the glass water tank is detected to leak, the controller obtains the height h0 of glass water leakage in unit time by detecting the height change of glass water in the glass water tank within a certain time, and predicts the time required for glass water leakage according to the current height of glass water and h0, so as to remind a driver according to the time. For example, when the controller does not send a motor start signal, it detects that the glass water leakage height is 5cm within 24 hours, and if the glass water height of the current glass water tank is 50cm, it can be obtained that the glass water tank is about to leak out after 240 hours.
Certainly, the obtained time is only the time required by the glass water leakage, if the windshield is cleaned by using the glass water at ordinary times, the height of the glass water used by starting the motor every time needs to be considered, and the time required by the glass water leakage is recalculated by using the height of the residual glass water in the glass water tank after the glass water is used every time, so that a driver is reminded to supplement the glass water or overhaul the glass water tank according to accurate time.
In the embodiment, different levels of warning can be given according to the height h0 of glass water leakage in unit time, so that a driver can be reminded to repair or replace the glass water tank in time. If h0 is large, indicating that the leakage condition is serious, giving a first-level warning to the driver to remind the driver to overhaul in time; if h0 is too small, it indicates that the leak is not severe and does not affect normal use, giving the driver a secondary warning.
It should be noted that, in the present embodiment, when the time required for the glass to leak out is predicted, the leaking process is treated as a constant-speed leaking process. Of course, in practical application, different processing manners may be selected according to different leakage situations for prediction, and this embodiment is not limited herein.
According to the device for detecting the height of the glass water in the water tank by using the sound, provided by the embodiment of the invention, whether the motor has a fault is judged by comparing the height of the glass water corresponding to the working current with the height difference of the glass water corresponding to the frequency of the sound signal of the glass water, so that a driver can be reminded to overhaul in time. Moreover, the glass water height corresponding to the working time can be obtained by obtaining the sum of the working time of the motor and utilizing a time-height function, whether the glass water tank leaks or the windshield wiper pipeline is blocked or not is judged by comparing the difference value of the glass water height corresponding to the working current and the glass water height corresponding to the working time, the problems are found in time, a driver is reminded to overhaul, and the use experience of the user is improved.
In addition, the current-height function can be used for verifying the height of the glass water detected by sound, the controller compares the height of the glass water obtained by the frequency-height function with the height of the glass water obtained by the working current, and when the difference is within a first preset height range, the accuracy of the sound detection of the height of the glass water in the water tank is shown.
EXAMPLE III
The present embodiment further provides a wiper system, and the wiper system according to the present embodiment will be described with reference to the accompanying drawings.
Referring to fig. 3, a diagram of a wiper system according to an embodiment of the present invention is shown.
The wiper system of the present embodiment includes the apparatus 301 for detecting the level of molten glass in a water tank using sound of the first and second embodiments, further comprising: a glass water tank 103, a wiper 104 and a motor 105.
The device 301 is used for detecting the height of the glass water in the glass water tank 103.
The glass water tank 103 is used for containing glass water and is connected with the wiper 104.
And a motor 105 for driving the glass water in the glass water tank 103 to be sprayed out from the wiper 105.
It should be noted that, in this embodiment, the specific function of the device for detecting the height of the glass water in the water tank by using sound may be implemented to participate in the functions described in the first embodiment or the second embodiment, and details are not described herein.
Through the windshield wiper system that this embodiment provided, through the height that utilizes sound detection glass water in the glass water tank to realize the height of in time accurate detection glass water, and then before glass water runs out, supply glass water, so that utilize glass water and windshield wiper washing windshield, improve and drive experience.
It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present teachings, or modify equivalent embodiments to equivalent variations, without departing from the scope of the present teachings, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (9)
1. An apparatus for detecting the level of glass water in a water tank by sound, applied to a glass water tank, comprising: a microphone module and a controller;
the glass water tank is used for containing glass water;
the glass water tank is connected with a windshield wiper;
the glass water tank also comprises a motor, and the motor is used for driving the glass water in the glass water tank to be sprayed out of the windshield wiper;
the controller is used for sending a motor starting signal to the motor;
the microphone module is used for obtaining sound signals of the glass water when the motor is started;
the controller is used for carrying out spectrum analysis on the sound signal to obtain the frequency of the sound signal, and obtaining the height of the glass water corresponding to the frequency of the sound signal through a frequency-height function; the frequency-height function is obtained in advance through experiments;
a current detection circuit;
the current detection circuit is used for obtaining the working current of the motor;
the controller is also used for obtaining the height of the glass water corresponding to the working current of the motor through a current-height function; the current-height function is obtained in advance through experiments; when the difference between the height of the glass water corresponding to the frequency and the height of the glass water corresponding to the working current is not within a first preset height range, judging that the motor has a fault;
the controller is also used for obtaining the sum of the working time of the motor; obtaining the height of the glass water corresponding to the current working time of the motor according to a time-height function; obtaining test data of the frequency corresponding to the sound signal and the height of the glass water for multiple times in advance; performing curve fitting according to the test data to obtain the frequency-height function;
the controller is also used for judging that the windshield wiper pipeline is blocked when the difference between the height of the molten glass corresponding to the frequency and the height of the molten glass corresponding to the working time is larger than a second preset height range;
and when the difference between the glass water height corresponding to the working current and the glass water height corresponding to the working time is smaller than a third preset height range, judging that the glass water tank leaks.
2. The apparatus of claim 1, wherein the controller is further configured to screen the sound signal for a sound segment between the time the controller sends the motor-on signal to the motor and the time the controller sends the motor-off signal to the motor before performing a spectral analysis on the sound signal to obtain the frequency of the sound signal.
3. The apparatus of claim 1, wherein the microphone module is further configured to obtain a background sound signal in advance when the motor is not turned on, and send the background sound signal to the controller;
the controller is further configured to subtract the background sound signal from the sound signal before performing a spectral analysis on the sound signal to obtain a frequency of the sound signal.
4. The apparatus according to claim 3, wherein the microphone module obtains a background sound signal in advance when the motor is not turned on, specifically:
the microphone module obtains a background sound signal when the motor is not started for multiple times in advance, and sends the obtained background sound signal for multiple times to the controller;
the controller averages the background sound signals obtained for multiple times to serve as a final background sound signal;
the controller subtracts the background sound signal from the sound signal, specifically:
the controller subtracts the final background sound signal from the sound signal.
5. The apparatus of claim 1, wherein the controller predicts a time required for the glass water to be leaked out according to a current glass water level in the glass water tank and a height of the glass water in the glass water tank decreased by the leakage per unit time when it is judged that the glass water tank is leaked out, so as to remind a driver according to the time required for the glass water to be leaked out.
6. The apparatus for detecting the level of molten glass in a water tank using sound according to claim 1, wherein the controller sets a unique ID for the motor, and the controller sets a unique ID for the wiper;
the controller sends the motor starting signal to the motor through the ID of the motor, and the controller sends a wiper starting signal to the wiper through the ID of the wiper; when the motor is started, the glass water is driven to the windshield wiper to be sprayed out.
7. The apparatus of claim 1, wherein the controller is located in a vehicle or in a remote server.
8. The apparatus for detecting the level of glass water in a water tank by sound according to claim 7, further comprising a remote server;
the controller is further used for sending the sound signal to the remote server;
the remote server is used for carrying out spectrum analysis on the sound signal through a neural network to obtain the frequency of the sound signal, and obtaining the height of the glass water corresponding to the frequency of the sound signal through a frequency-height function.
9. A wiper system comprising the apparatus for detecting the level of molten glass in a water tank using sound according to any one of claims 1 to 8, further comprising: glass water tank, motor and windshield wiper.
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| CN110243441A (en) * | 2019-06-06 | 2019-09-17 | 江阴市富仁高科股份有限公司 | A kind of tank capacity detection device and detection method |
| CN115615521A (en) * | 2022-08-17 | 2023-01-17 | 南京淼瀛科技有限公司 | Oil quantity detection method and system based on non-invasive ultrasonic sensor |
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| CN107421604A (en) * | 2017-04-26 | 2017-12-01 | 珠海智牧互联科技有限公司 | A kind of audio material-level detection system and method |
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| EP1495928B1 (en) * | 2002-03-13 | 2008-01-23 | Niles Co., Ltd. | Method for controlling wiper and wiper controller |
| JP5779107B2 (en) * | 2012-01-04 | 2015-09-16 | 日立Ｇｅニュークリア・エナジー株式会社 | Liquid level measuring method and liquid level measuring apparatus |
| US9718549B2 (en) * | 2013-08-09 | 2017-08-01 | Mag Aerospace Industries, Llc | Grey water interface valve liquid level sensor system |
| CN103954318B (en) * | 2014-04-01 | 2016-04-13 | 山东康威通信技术股份有限公司 | A kind of rubber dam vibrations deformation and dynamic overflow water level monitoring analytical approach |
| FR3037649B1 (en) * | 2015-06-16 | 2017-07-07 | Coutier Moulage Gen Ind | DEVICE AND METHOD FOR MEASURING LIQUID HEIGHT IN A CONTAINER |
| CN105181070A (en) * | 2015-09-21 | 2015-12-23 | 深圳麦开网络技术有限公司 | Method and device for measuring liquid volume in container on basis of sound resonance |
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| CN109163779B (en) * | 2018-08-16 | 2021-05-28 | 杭州容大智造科技有限公司 | Equipment for detecting height of glass water in water tank by using current and windshield wiper system |
| CN109141583B (en) * | 2018-08-16 | 2020-11-17 | 杭州容大智造科技有限公司 | Equipment for detecting height of glass water in water tank by using time and windshield wiper system |
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