Voice control information acquisition device and tobacco curing barn control system

Abstract

The invention discloses a voice control information acquisition device and a tobacco curing barn control system. The device comprises a first volume sensor, a second volume sensor, a voice interaction unit and a main control unit. The voice interaction unit determines voice control information in the collected sound signals and sends the voice control information and the sound duration time period to the main control unit; the main control unit is used for controlling the sound intensity of a sound signal received by the first volume sensor in the sound duration time period and the sound intensity of a sound signal received by the second volume sensor in the sound duration time period when the sound duration time period is received. And determining whether a sound source sending the sound signal is in a preset area, determining a control instruction corresponding to the voice control information when the sound source is in the preset area, and sending the control instruction to a far-end upper computer. According to the mode, the acquisition accuracy of the voice control information can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of audio acquisition, and in particular to a device for collecting voice control information and a control system for a tobacco leaf curing barn. Background Art

[0002] As the market demand for cigarettes is increasing, in order to meet the supply of tobacco leaves, when major tobacco companies cure tobacco leaves, they mostly use intensive curing barns for tobacco leaf curing, arranging multiple curing barns in sequence, and the distance between each adjacent curing barn in the intensive curing barns is relatively close.

[0003] Here, each curing barn has a tobacco leaf curing barn controller. The main function of the tobacco leaf curing barn controller is to set the baking temperature curve, control the heating and moisture exhaust equipment, and make the temperature in the curing barn track the target temperature. Currently, the existing tobacco leaf curing barn controllers are often connected with voice command collectors. During the tobacco leaf curing process, the operator issues voice control information orally. The voice command collector connected to the tobacco leaf curing barn controller collects the voice control information, converts the voice control information into a control command for the tobacco leaf curing barn controller, and sends the control command to the tobacco leaf curing barn controller, so that the tobacco leaf curing barn controller performs corresponding control actions based on the control command, including adjusting parameters such as the dry bulb temperature, wet bulb temperature, heating time, and constant temperature time of the curing barn, to achieve precise control of the tobacco leaf curing process.

[0004] However, the current voice command collector has a low accuracy in collecting voice control information. As long as the voice command collector collects voice control information, it will send a control command corresponding to the voice control information to the tobacco leaf curing barn controller. However, since the curing barn group is composed of several curing barns connected side by side, and the distance between each curing barn is relatively close, when the voice command collector of a tobacco leaf curing barn controller is actually working, it may collect the voice control information issued by the operator to the tobacco leaf curing barn controller of the adjacent curing barn, and generate a control command corresponding to the voice control information, thereby causing the tobacco leaf curing barn controller corresponding to the voice command collector to perform corresponding control actions, affecting the curing effect of the tobacco leaves. Therefore, the accuracy of the current voice command collector in collecting voice control information needs to be improved urgently. Summary of the Invention

[0005] In view of this, the present application provides a device for collecting voice control information and a control system for a tobacco leaf curing barn, mainly aiming to solve the technical problem of too low accuracy in collecting voice control information.

[0006] According to the first aspect of the present invention, a device for collecting voice control information is provided. The device includes a first volume sensor, a second volume sensor, a voice interaction unit, and a main control unit, wherein the first volume sensor and the second volume sensor are spaced apart by a preset distance;

[0007] The voice interaction unit is used to collect sound signals in real time, determine whether the sound signals contain voice control information, and when the sound signals contain the voice control information, determine the sound duration period of the voice control information, and send the sound duration period and the voice control information to the main control unit;

[0008] The first volume sensor is used to collect the first sound signal in real time and send the first sound signal to the main control unit, and the second volume sensor is used to collect the second sound signal in real time and send the second sound signal to the main control unit;

[0009] The main control unit is used to, when receiving the sound duration period, determine the first sound signal received within the sound duration period as the first audio information, and determine the second sound signal received within the sound duration period as the second audio information, and determine whether the sound source that emits the sound signal is within a preset area based on the sound intensity of the first audio information and the sound intensity of the second audio information;

[0010] The main control unit is further used to, when determining that the sound source is within the preset area, determine a preset control instruction corresponding to the voice control information, and send the control instruction to the upper computer at the remote end.

[0011] In an optional embodiment, the manner in which the voice interaction unit determines whether the sound signal contains voice control information includes: the voice interaction unit inputs the sound signal into a pre-trained sound recognition model, so that the sound recognition model determines the voice control information in the sound signal.

[0012] In an optional embodiment, the manner in which the voice interaction unit determines the sound duration period of the voice control information includes: the voice interaction unit determines an audio segment corresponding to the voice control information in the sound signal, and determines the start time point of the audio segment and the end time point of the audio segment; uses the start time point and the end time point as the sound duration period; the manner in which the main control unit, when receiving the sound duration period, determines the first sound signal received within the sound duration period as the first audio information and determines the second sound signal received within the sound duration period as the second audio information includes: the main control unit determines the first sound signal received from the start time point to the end time point as the first audio information, and determines the second sound signal received from the start time point to the end time point as the second audio information.

[0013] In an optional embodiment, the main control unit includes a sound comparison circuit and a main control chip. Among them, the sound comparison circuit includes a first operational amplifier, a second operational amplifier, and a voltage comparator; the main control chip is configured to send the first audio information to the signal input end of the first operational amplifier in the form of a voltage signal, and send the second audio information to the signal input end of the second operational amplifier in the form of a voltage signal; the first operational amplifier is configured to perform signal amplification processing on the voltage signal corresponding to the first audio information to obtain a first amplified signal, and send the first amplified signal to the inverting input end of the voltage comparator; the second operational amplifier is configured to perform signal amplification processing on the voltage signal corresponding to the second audio information to obtain a second amplified signal, and send the second amplified signal to the non-inverting input end of the voltage comparator; the output end of the voltage comparator is connected to the signal input end of the main control chip to send a pulse sequence signal to the main control chip; the main control chip is configured to determine whether the sound source is within the preset area based on the duty cycle of the pulse sequence signal, and when it is determined that the sound source is within the preset area, determine a preset control instruction corresponding to the voice control information, and send the control instruction to the remote host computer.

[0014] In an optional embodiment, the manner in which the main control chip determines whether the sound source is within the preset area based on the duty cycle of the pulse sequence signal includes: the main control chip determines whether the duty cycle of the pulse sequence signal is within a preset duty cycle range; when the duty cycle is within the duty cycle range, it is determined that the sound source is within the preset area.

[0015] In an optional embodiment, the manner in which the main control unit determines a preset control instruction corresponding to the voice control information includes: the main control unit compares the voice control information with a preset instruction information comparison table, where the instruction information comparison table includes a plurality of preset control information and a preset control instruction corresponding to each preset control information; determines the preset control information that is the same as the voice control information as the target control information, and determines the preset control instruction corresponding to the target control information as the control instruction.

[0016] In an alternative embodiment, the master control unit determines a preset control instruction corresponding to the voice control information in the following manner: the master control unit compares the voice control information with a preset instruction information comparison table, where the instruction information comparison table includes multiple preset control information and a preset control instruction corresponding to each preset control information; determines the preset control information identical to the voice control information as the target control information, and determines the preset control instruction corresponding to the target control information as the control instruction.

[0017] In an alternative embodiment, the voice interaction unit has a speaker; the master control unit is further configured to receive instruction execution result information from the host computer and send the instruction execution result information to the voice interaction unit, so that the voice interaction unit plays the instruction execution result information through the speaker.

[0018] In an alternative embodiment, the acquisition device of the voice control information further includes a power conversion circuit; the power conversion circuit is connected to an external power supply, accesses a power voltage from the power supply, converts the power voltage into a power supply voltage of a preset voltage level, and supplies power to the master control unit based on the power supply voltage.

[0019] In an alternative embodiment, the acquisition device of the voice control information further includes a communication interface circuit, and the master control unit establishes a communication connection with the host computer through the communication interface circuit.

[0020] According to the second aspect of the present invention, a tobacco leaf curing barn control system is provided, which includes a tobacco leaf curing barn controller and an acquisition device of voice control information as described above;

[0021] wherein, the tobacco leaf curing barn controller is connected to the master control unit in the acquisition device of the voice control information.

[0022] An acquisition device for voice control information and a tobacco leaf curing barn control system provided by the present invention collect sounds in real time by a first volume sensor, and send the collected first sound signal to a main control unit. A second volume sensor also collects sounds in real time, and sends the collected second sound signal to the main control unit, so that the main control unit stores the first sound signal and the second sound signal. Further, a voice interaction unit collects the sound signal in the current environment in real time, determines whether the sound signal contains voice control information, and when the sound signal contains voice control information, determines the sound duration period of the voice control information, and sends the sound duration period and the voice control information to the main control unit; further, the main control unit determines, in the stored first sound signal, the audio segment of the first sound signal received during the sound duration period as the first audio information, and determines, in the stored second sound signal, the audio segment of the second sound signal received during the sound duration period as the second audio information; further, the main control unit determines whether the sound source that issues the sound signal is within a preset area based on the sound intensity of the first audio information and the sound intensity of the second audio information, and when it is determined that the sound source is within the preset area, determines the control instruction corresponding to the voice control information, and sends the control instruction to the tobacco leaf curing barn controller, so that the tobacco leaf curing barn controller performs corresponding control actions. The technical solution provided by this application sends the control instruction corresponding to the voice control information to the tobacco leaf curing barn controller only when it is determined that the operator who issues the voice control information is located in a specific preset area, effectively improving the acquisition accuracy of the voice control information and effectively avoiding the situation of mis-acquiring the voice control information issued to adjacent curing barns.

[0023] The above description is only an overview of the technical solution of this application. In order to be able to understand the technical means of this application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of this application more obvious and understandable, the specific embodiments of this application are specifically given below. Brief Description of the Drawings

[0024] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0025] Figure 1 The structural schematic diagram of an acquisition device for voice control information provided by an embodiment of the present invention is shown;

[0026] Figure 2 The schematic diagram of the setting method of a first volume sensor and a second volume sensor provided by an embodiment of the present invention is shown;

[0027] Figure 3 The figure shows a schematic structural diagram of a main control unit provided by an embodiment of the present invention;

[0028] Figure 4 The figure shows a schematic structural diagram of a voice interaction unit provided by an embodiment of the present invention;

[0029] Figure 5 The figure shows a schematic structural diagram of a power conversion circuit provided by an embodiment of the present invention;

[0030] Figure 6 The figure shows a schematic structural diagram of a tobacco leaf curing barn control system provided by an embodiment of the present invention. Detailed implementation manners

[0031] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0032] In one embodiment, as Figure 1 shown, a device for collecting voice control information is provided. Taking the scenario where the device is applied to collect voice control information to output control instructions for a tobacco leaf curing barn controller as an example, the device includes a first volume sensor 100, a second volume sensor 200, a voice interaction unit 300, and a main control unit 400. Among them, the first volume sensor 100 and the second volume sensor 200 can be sound collection devices, and collect sound signals through the microphones they have; further, the voice interaction unit 300 can be a computer device with a microphone, which is used to collect sound signals and perform corresponding processing on the sound signals; further, the main control unit 400 can also be a computer device, which is used to perform corresponding operations and processing based on the programs pre-set therein.

[0033] Further, as Figure 2As shown, the first volume sensor 100 and the second volume sensor 200 are spaced apart by a preset distance D. Here, the first volume sensor 100 and the second volume sensor 200 can be arranged in front of the baking room 30, specifically on the inspection path of the operator in front of the baking room 30. The line connecting the first volume sensor 100 and the second volume sensor 200 is parallel to the inspection path. Specifically, the first volume sensor 100 and the second volume sensor 200 on the voice control information acquisition device 10 are located on the left and right sides of the voice control information acquisition device 10. Assuming the included angle between the central axis of the volume sensor and the central axis of the voice control information acquisition device 10 is a, considering comprehensively that the distance between the operator and the tobacco leaf baking room controller 20 is about 0.4 - 0.6 meters, that is, the minimum distance Smin between the operator and the tobacco leaf baking room controller 20 is 0.4 meters, the maximum distance Smax is 0.6 meters, the viewing angle range b of the touch screen (not shown in the figure) set on the voice control information acquisition device 10 is about 120 degrees, the width W of the voice control information acquisition device 10 is about 0.4 meters, and the maximum distance L that the operator is allowed to deviate from the edge of the voice control information acquisition device 10 is 0.4 meters. When the operator is in the extreme position, the included angle between the line connecting the operator and the remote volume sensor (the first volume sensor 100 in the figure) and the central axis of the volume sensor is 90 degrees. Substituting the above parameters into formula 1, the calculated range of the angle a is 26.5 - 36.8 degrees. Here, the value close to the middle value 30 degrees is taken; among them, formula 1 is:

[0034]

[0035] Among them, θ is the value of the angle a, Smax is the maximum distance between the operator and the tobacco leaf baking room controller 20, Smin is the minimum distance between the operator and the tobacco leaf baking room controller 20, W is the width of the voice control information acquisition device 10, and L is the maximum distance that the operator is allowed to deviate from the edge of the voice control information acquisition device 10, that is, the maximum distance that the operator is allowed to deviate from the edge of the voice control information acquisition device 10 close to the operator side.

[0036] Furthermore, the sum of the maximum distance that the operator is allowed to deviate from the left edge of the voice control information acquisition device 10, the maximum distance that the operator is allowed to deviate from the right edge of the voice control information acquisition device 10, and the width of the voice control information acquisition device 10 is determined as the length of the preset area 600, so that the preset area 600 can cover the inspection path of the operator in front of the baking room; here, the length of the preset area 600 can also be determined according to the actual situation and is equally applicable to this embodiment.

[0037] Furthermore, as Figure 1As shown, the voice interaction unit 300 is used to collect sound signals in real time and determine whether the sound signals contain voice control information; specifically, the voice interaction unit 300 can collect sound signals in its surrounding environment through a microphone provided thereon, and the sound signals include the background sound of the environment and the sound of voice control information dictated by the operator.

[0038] Here, the voice interaction unit 300 can input the collected sound signals into a pre-trained sound recognition model so that the sound recognition model can determine the voice control information in the sound signals. Among them, the sound recognition model can be a pre-trained neural network model, which can recognize voice control information related to control instructions in the sound signals. Here, during model training, first, an audio data set containing target information can be collected and labeled, and each audio data in it is labeled with a corresponding control instruction identifier; then, the audio data set is divided into a training set, a validation set and a test set, the model parameters are adjusted through backpropagation, and the performance of the validation set is monitored during the training process to prevent overfitting of the model, so as to obtain a trained sound recognition model. Finally, the sound recognition model is deployed on the voice interaction unit 300 so that the voice interaction unit 300 can have the corresponding voice recognition function.

[0039] Further, when the voice interaction unit 300 determines that the sound signal contains the voice control information, it determines the sound duration period of the voice control information and sends the sound duration period and the voice control information to the main control unit 400.

[0040] Specifically, the voice interaction unit 300 determines the audio segment corresponding to the voice control information in the sound signal, and determines the start time point of the audio segment and the end time point of the audio segment; here, after determining the voice control information from the sound signal, it can determine the position of the audio segment where the voice control information is located in the sound signal obtained in real time, that is, separate the audio segment recording the voice control information. Further, the start time point and the end time point of the audio segment can be determined. As an example, if the voice control information dictated by the operator is "increase the dry bulb temperature by one degree", the start time of the audio segment recording "increase the dry bulb temperature by one degree" is 12:15:25, and the end time is 12:15:29, then 12:15:25 is determined as the start time point, and 12:15:29 is determined as the end time point. Further, the voice interaction unit 300 sends the recognized voice control information to the main control unit 400, and sends the start time point and the end time point to the main control unit 400 as the sound duration period, so that the main control unit 400 can determine the time when the operator dictates the voice control information.

[0041] Further, as Figure 1 shown, the first volume sensor 100 is configured to collect the first sound signal in real time and send the first sound signal to the main control unit 400, and the second volume sensor 200 is configured to collect the second sound signal in real time and send the second sound signal to the main control unit 400. Among them, the main control unit 400 can store the received first sound signal and the second sound signal for subsequent use. Here, the first volume sensor 100 can collect the ambient sound at its location in real time as the first sound signal, and the first sound signal can include the voice control information dictated by the operator. Similarly, the second volume sensor 200 can also collect the ambient sound at its location in real time as the second sound signal, and the second sound signal can also include the voice control information dictated by the operator. Here, when the volume sensor collects sound through the microphone, it generates a voltage signal based on the intensity of the sound. The higher the intensity of the sound, the higher the voltage value of the voltage signal. Further, the volume sensor sends the generated voltage signal to the main control unit 400 so that the main control unit 400 stores the sound signal in the form of a voltage signal.

[0042] Further, the main control unit 400 is configured to, when receiving the sound duration period, determine the first sound signal received during the sound duration period as the first audio information and determine the second sound signal received during the sound duration period as the second audio information. Here, the main control unit 400 can determine the first sound signal received from the start time point to the end time point as the first audio information and determine the second sound signal received from the start time point to the end time point as the second audio information. Specifically, the main control unit 400 can determine the sound duration period and determine the first sound signal obtained during the sound duration period from the stored first sound signals as the first audio information. As an example, if the start time point of the sound duration period is 12:15:25 and the end time point is 12:15:29, the first sound signal obtained from the first volume sensor 100 between 12:15:25 and 12:15:29 can be determined as the first audio information. Similarly, after determining the sound duration period, the main control unit 400 can determine the second sound signal obtained during the sound duration period from the stored second sound signals as the second audio information.

[0043] Further, the main control unit 400 determines whether the sound source that emits the sound signal is within the preset area 600 based on the sound intensity of the first audio information and the sound intensity of the second audio information. Specifically, the main control unit 400 first determines the sound intensities of the first audio information and the second audio information; then, based on the characteristic that the sound intensity is inversely proportional to the square of the distance, the distance ratio from the sound source to the first volume sensor 100 and the second volume sensor 200 is calculated by comparing the difference in the measured sound intensities at two places, and then the position of the sound source is determined; finally, the main control unit 400 determines whether the position of the sound source is within the preset area 600.

[0044] Further, when the main control unit 400 determines that the sound source is within the preset area 600, it is further configured to determine a preset control instruction corresponding to the voice control information and send the control instruction to the remote host computer 500.

[0045] Specifically, first, the main control unit 400 compares the voice control information with a preset instruction information comparison table, where the instruction information comparison table includes a plurality of preset control information and a preset control instruction corresponding to each preset control information; here, the main control unit 400 can convert the voice control information into text information and use the converted text information as the voice control information to compare with the instruction information comparison table. Among them, the preset control instruction can be a string of serial port data, which is used as a code language description to make the tobacco leaf baking room controller execute corresponding control actions. For example, the preset control instruction "0x0100" corresponding to "the dry bulb temperature rises by 0.5 degrees" is used to make the tobacco leaf baking room controller control the current dry bulb temperature to rise by 0.5 degrees. As an example, the form of the instruction information comparison table can be as shown in Table 1:

[0046] Preset control instruction Preset control information 0x0100 The dry bulb temperature rises by 0.5 degrees 0x0203 The heating time is shortened by 1 hour …… ……

[0047] Table 1

[0048] Then, the main control unit 400 determines the preset control information that is the same as the voice control information as the target control information, and determines the preset control instruction corresponding to the target control information as the control instruction. As an example, if the voice control information converted into text information is "the dry bulb temperature rises by 0.5 degrees", then the preset control information that is the same as "the dry bulb temperature rises by 0.5 degrees" in the instruction information comparison table is determined as the target control information, and the preset control instruction "0x0100" corresponding to the target control information is determined as the control instruction.

[0049] The voice control information acquisition device provided by this application can send the control instruction corresponding to the voice control information to the tobacco leaf baking room controller only when it is determined that the operator who issues the voice control information is located in a specific preset area, effectively improving the acquisition accuracy of the voice control information and effectively avoiding the situation of misacquiring the voice control information issued to adjacent baking rooms.

[0050] In an alternative embodiment, as Figure 3 shown, the main control unit includes a sound comparison circuit and a main control chip 410. Among them, the sound comparison circuit includes a first operational amplifier 421, a second operational amplifier 422, a voltage comparator 423, a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4. Among them, the first operational amplifier 421 and the second operational amplifier 422 are used to amplify the received voltage signals.

[0051] Specifically, the main control chip 410 is used to send the first audio information to the signal input terminal of the first operational amplifier 421 in the form of a voltage signal, and send the second audio information to the signal input terminal of the second operational amplifier 422 in the form of a voltage signal.

[0052] Furthermore, the first operational amplifier 421 is used to perform signal amplification processing on the voltage signal corresponding to the first audio information to obtain a first amplified signal, and send the first amplified signal to the inverting input terminal of the voltage comparator 423. Furthermore, the second operational amplifier 422 is used to perform signal amplification processing on the voltage signal corresponding to the second audio information to obtain a second amplified signal, and send the second amplified signal to the non-inverting input terminal of the voltage comparator 423.

[0053] Furthermore, the output terminal of the voltage comparator 423 is connected to the signal input terminal of the main control chip 410 to send a pulse sequence signal to the main control chip 410; here, because when a person is speaking, high and low tones will be emitted, making the sound wave emitted constantly oscillating, resulting in the voltage value of the voltage signal corresponding to the first audio information and the voltage value of the voltage signal corresponding to the second audio information being constantly oscillating. Furthermore, the voltage values of the first amplified signal and the second amplified signal will also oscillate. Sometimes the voltage value of the first amplified signal will exceed the voltage value of the second amplified signal. At this time, the voltage comparator 423 outputs a low-level signal, and sometimes the voltage value of the second amplified signal will exceed the voltage value of the first amplified signal. At this time, the voltage comparator 423 outputs a high-level signal, thereby causing the output terminal of the voltage comparator 423 to output a pulse sequence signal.

[0054] Further, the main control chip 410 is further configured to determine whether the sound source is within the preset area based on the duty cycle of the pulse sequence signal.

[0055] Specifically, the main control chip 410 can determine whether the duty cycle of the pulse sequence signal is within a preset duty cycle range, and when the duty cycle is within the duty cycle range, determine that the sound source is within the preset area; wherein, the duty cycle range can be set to 0.1 to 0.9. Here, the duty cycle range can be determined through experiments. Specifically, the operator can be made to issue commands at each position within the preset area at a normal voice volume, and the time length for the operator to issue a command at one position can be 10 seconds; when the operator is at each position, the first volume sensor sends the collected sound signal to the first operational amplifier 421 in the form of a voltage signal, and the first operational amplifier 421 outputs a first amplified signal; at the same time, the second volume sensor sends the collected sound signal to the second operational amplifier 422 in the form of a voltage signal, and the second operational amplifier 422 outputs a second amplified signal; further, the voltage comparator 423 outputs a pulse sequence signal based on the first amplified signal and the second amplified signal. At this time, the duty cycle of this pulse sequence signal can be recorded as the duty cycle corresponding to this position. Further, the numerical range formed by the duty cycles of the pulse sequence signals corresponding to all the above positions is determined as the duty cycle range.

[0056] Further, during the actual working process, if the duty cycle of the pulse sequence signal exceeds 0.9, it means that the operator as the sound source is too far away from the first volume sensor (not shown in the figure), causing the sound intensity collected by the first volume sensor to be too low, and further indicating that the operator is too far away from the tobacco leaf curing barn controller, and the command issued by the operator is the command issued to the adjacent tobacco leaf curing barn controller; similarly, if the duty cycle of the pulse sequence signal is lower than 0.1, it means that the sound source is too far away from the second volume sensor (not shown in the figure), causing the sound intensity collected by the second volume sensor to be too low, which can also indicate that the operator is too far away from the tobacco leaf curing barn controller. Further, if the sound source is located in the area between the first volume sensor and the second volume sensor, or the distance from the above area is not far, the sound intensity collected by the first volume sensor and the sound intensity collected by the second volume sensor will be relatively close, making the duty cycle of the pulse sequence signal between 0.1 and 0.9. In this way, the relative position of the sound source with respect to the first volume sensor and the second volume sensor can be determined based on the duty cycle of the pulse sequence signal, and further, it can be determined whether the sound source is within the preset area.

[0057] Further, when the main control chip 410 determines that the sound source is within the preset area, it determines a preset control instruction corresponding to the voice control information and sends the control instruction to a remote host computer (not shown in the figure).

[0058] The embodiment provided by the present application can determine whether the sound source is within the preset area corresponding to the acquisition device of the voice control information based on the duty cycle of the pulse sequence signal emitted by the sound comparison circuit, which can effectively avoid the situation that the device wrongly acquires the voice control information sent to the adjacent baking room, and improves the acquisition accuracy of the voice control information.

[0059] Further, the main control chip can be respectively connected to the output ends of the first operational amplifier and the second operational amplifier to obtain the first amplified signal and the second amplified signal. Further, after the main control chip determines that the duty cycle of the pulse sequence signal is within the preset duty cycle range, it can determine whether the first audio information collected by the first volume sensor and the second audio information collected by the second volume sensor are ambient background noises.

[0060] Specifically, the main control chip can determine whether the duty cycle of the pulse sequence signal is higher than a preset duty cycle value. Among them, the duty cycle value is within the duty cycle range, and the duty cycle value can be the center point of the duty cycle range. For example, if the duty cycle range is 0.1 to 0.9, the duty cycle value can be 0.5.

[0061] Further, if the duty cycle is greater than the duty cycle value, the first voltage average value of the first amplified signal during the sound duration period is determined and compared with a preset first noise judgment threshold. The determination method of the first noise judgment threshold is as follows: First, when no voice command is received, the first volume sensor collects the first sound signal of a specific time length for the ambient noise, and inputs the voltage signal representing the first sound signal into the first operational amplifier; Subsequently, the voltage signal output by the first operational amplifier is obtained, and the average value of the voltage signal output by the first operational amplifier during the specific time length is calculated, and this average value is determined as the first noise judgment threshold.

[0062] Specifically, if the voice duration is from 12:15:25 to 12:15:29, calculate the average value of the first amplified signal within 4 seconds as the first voltage average value. Further, when the difference between the first voltage average value and the first noise judgment threshold is greater than the first preset decibel value, it is determined that the first audio information is valid, proving that the voice control information collected by the voice interaction unit is not environmental noise, and a control instruction can be generated based on the voice control information. Among them, the first preset decibel value can be 10 decibels. In contrast, when the difference between the first voltage average value and the first noise judgment threshold is not greater than the first preset decibel value, it is determined that the first audio information is environmental noise, and the voice control information collected by the voice interaction unit is invalid.

[0063] Similarly, if the duty cycle is less than or equal to the duty cycle value, determine the second voltage average value of the second amplified signal during the voice duration, and compare the second voltage average value with the preset second noise judgment threshold. The determination method of the second noise judgment threshold is as follows: First, when no voice command is received, the second volume sensor collects the second voice signal of a specific time length for environmental noise, and inputs the voltage signal representing the second voice signal into the second operational amplifier. Subsequently, obtain the voltage signal output by the second operational amplifier, and calculate the average value of the voltage signal output by the second operational amplifier within a specific time length, and determine this average value as the second noise judgment threshold.

[0064] Further, when the difference between the second voltage average value and the second noise judgment threshold is greater than the second preset decibel value, it is determined that the second audio information is valid, and the voice control information collected by the voice interaction unit is not environmental noise, and a control instruction can be generated based on the voice control information. Among them, the second preset decibel value can also be 10 decibels. In contrast, when the difference between the second voltage average value and the second noise judgment threshold is not greater than the second preset decibel value, it is determined that the second audio information is environmental noise, and the voice control information collected by the voice interaction unit is environmental noise, and this voice control information is invalid.

[0065] In an alternative embodiment, such as Figure 4As shown in the figure, the voice interaction unit 300 includes a voice interaction chip 330, a speaker 340, a microphone 350, a first capacitor C1, and a first polarized capacitor C2. Further, the voice interaction chip 330 is respectively connected to the main control unit 400, the speaker 340, and the microphone 350. Further, the main control unit 400 is further configured to receive instruction execution result information from the host computer (not shown in the figure) and send the instruction execution result information to the voice interaction unit 300, so that the voice interaction unit 300 plays the instruction execution result information through the speaker 340. Among them, the instruction execution result information may be the execution result of the tobacco leaf baking house controller for the control instruction. The voice interaction chip 330 in the voice interaction unit 300 may generate a return voice for the execution result and output it externally through the speaker 340.

[0066] The embodiment provided by the present application can output the execution result of the tobacco leaf baking house controller for the control instruction, so that the operator can clearly know the execution result of the instruction issued by him, and improves the control ability of the tobacco leaf baking process.

[0067] In an optional embodiment, the acquisition device of the voice control information further includes a power conversion circuit; specifically, as Figure 5 shown, the power conversion circuit includes a second polarized capacitor C3, a third polarized capacitor C4, a fourth polarized capacitor C5, a fifth polarized capacitor C6, a second capacitor C7, a third capacitor C8, a first voltage conversion chip U1, and a second voltage conversion chip U2.

[0068] Further, the power conversion circuit is connected to an external power supply E, accesses a power supply voltage from the power supply E, converts the power supply voltage into a power supply voltage of a preset voltage level, and supplies power to the main control unit 400 based on the power supply voltage. Here, the first voltage conversion chip U1 can convert the voltage input by the power supply E into a voltage of 5V and deliver the 5V voltage to the second voltage conversion chip U2. The second voltage conversion chip U2 converts the 5V voltage into a voltage of 3.3V and supplies power to the main control unit 400 based on the 3.3V voltage. The technical solution provided by the present application can convert the externally connected voltage based on an independent power conversion circuit to obtain a voltage that can supply power to components such as the first volume sensor, the second volume sensor, the voice interaction unit, and the main control unit, improving the power supply stability of the acquisition device of the voice control information.

[0069] In an optional embodiment, the acquisition device for voice control information further includes a communication interface circuit, where the communication interface circuit may be a remote communication chip and its peripheral circuits; further, the communication interface circuit is used to establish a communication connection between the main control unit and the host computer, so as to obtain information from the host computer and send the information to the main control unit, or obtain information from the main control unit and send the information to the host computer. The embodiment provided by this application can establish a communication connection between the acquisition device for voice control information and the host computer based on an independent communication interface circuit, improving the communication stability between the acquisition device for voice control information and the host computer.

[0070] The acquisition device for voice control information provided by this application can determine whether the sound source that issues the voice control information is within a preset area based on the sound intensity of the sound signals collected by two volume sensors at different positions. When it is determined that the operator who issues the voice control information is located in a specific preset area, the control instruction corresponding to the voice control information is sent to the tobacco leaf baking controller, which can effectively improve the acquisition accuracy of the voice control information and effectively avoid the situation of wrongly collecting the voice control information issued to adjacent baking rooms.

[0071] On the other hand, this application also provides a tobacco leaf baking control system, as Figure 6 shown. The tobacco leaf baking control system includes a tobacco leaf baking controller 20 and the acquisition device for voice control information as described above;

[0072] wherein, the tobacco leaf baking controller 20 is connected to the main control unit 400 in the acquisition device for voice control information, so that the main control unit 400 can send a control instruction to the tobacco leaf baking controller 20 to control the baking process of the tobacco leaves.

[0073] The above serial numbers of this application are only for description and do not represent the advantages or disadvantages of the implementation scenarios. The above-disclosed are only several specific implementation scenarios of this application. However, this application is not limited thereto, and any changes that can be thought of by those skilled in the art should fall within the protection scope of this application.

Claims

1. A device for collecting voice control information, characterized in that, The device includes a first volume sensor, a second volume sensor, a voice interaction unit, and a main control unit. Among them, the first volume sensor and the second volume sensor are spaced apart by a preset distance; The voice interaction unit is configured to collect sound signals in real time, determine whether the sound signals contain voice control information, and when the sound signals contain the voice control information, determine the sound duration period of the voice control information, and send the sound duration period and the voice control information to the main control unit; The first volume sensor is configured to collect a first sound signal in real time and send the first sound signal to the main control unit, and the second volume sensor is configured to collect a second sound signal in real time and send the second sound signal to the main control unit; The main control unit is configured to, when receiving the sound duration period, determine the first sound signal received within the sound duration period as the first audio information, and determine the second sound signal received within the sound duration period as the second audio information, and determine whether the sound source that emits the sound signal is within a preset area based on the sound intensity of the first audio information and the sound intensity of the second audio information; The main control unit is further configured to, when determining that the sound source is within the preset area, determine a preset control instruction corresponding to the voice control information, and send the control instruction to the upper computer at the remote end.

2. The acquisition device for voice control information according to claim 1, characterized in that The manner in which the voice interaction unit determines whether the sound signal contains voice control information includes: The voice interaction unit inputs the sound signal into a pre-trained sound recognition model, so that the sound recognition model determines the voice control information in the sound signal.

3. The acquisition device for voice control information according to claim 2, wherein The manner in which the voice interaction unit determines the sound duration period of the voice control information includes: The voice interaction unit determines an audio segment corresponding to the voice control information in the sound signal, and determines the start time point of the audio segment and the end time point of the audio segment; The start time point and the end time point are used as the sound duration period; The manner in which the main control unit, when receiving the sound duration period, determines the first sound signal received within the sound duration period as the first audio information and determines the second sound signal received within the sound duration period as the second audio information includes: The main control unit determines the first sound signal received from the start time point to the end time point as the first audio information, and determines the second sound signal received from the start time point to the end time point as the second audio information.

4. The acquisition device for voice control information according to claim 1, characterized in that, The main control unit includes a sound comparison circuit and a main control chip. Among them, the sound comparison circuit includes a first operational amplifier, a second operational amplifier, and a voltage comparator; The master control chip is configured to send the first audio information to the signal input terminal of the first operational amplifier in the form of a voltage signal, and send the second audio information to the signal input terminal of the second operational amplifier in the form of a voltage signal; The first operational amplifier is configured to perform signal amplification processing on the voltage signal corresponding to the first audio information to obtain a first amplified signal, and send the first amplified signal to the inverting input terminal of the voltage comparator; The second operational amplifier is configured to perform signal amplification processing on the voltage signal corresponding to the second audio information to obtain a second amplified signal, and send the second amplified signal to the non-inverting input terminal of the voltage comparator; The output terminal of the voltage comparator is connected to the signal input terminal of the master control chip to send a pulse sequence signal to the master control chip; The master control chip is configured to determine whether the sound source is within the preset area based on the duty cycle of the pulse sequence signal, and when it is determined that the sound source is within the preset area, determine a preset control instruction corresponding to the voice control information, and send the control instruction to the remote host computer.

5. The acquisition device for voice control information according to claim 4, wherein The manner in which the master control chip determines whether the sound source is within the preset area based on the duty cycle of the pulse sequence signal includes: The master control chip determines whether the duty cycle of the pulse sequence signal is within a preset duty cycle range; When the duty cycle is within the duty cycle range, it is determined that the sound source is within the preset area.

6. The acquisition device for voice control information according to claim 1, characterized in that, The manner in which the master control unit determines a preset control instruction corresponding to the voice control information includes: The master control unit compares the voice control information with a preset instruction information comparison table, where the instruction information comparison table includes a plurality of preset control information and a preset control instruction corresponding to each preset control information; The preset control information that is the same as the voice control information is determined as the target control information, and the preset control instruction corresponding to the target control information is determined as the control instruction.

7. The acquisition device for voice control information according to claim 6, characterized in that, The voice interaction unit has a speaker; The master control unit is further configured to receive instruction execution result information from the host computer and send the instruction execution result information to the voice interaction unit, so that the voice interaction unit plays the instruction execution result information through the speaker.

8. The acquisition device for voice control information according to claim 1, characterized in that, The acquisition device for the voice control information further includes a power conversion circuit; The power conversion circuit is connected to an external power supply, accesses a power supply voltage from the power supply, converts the power supply voltage into a power supply voltage of a preset voltage level, and supplies power to the master control unit based on the power supply voltage.

9. The acquisition device for voice control information according to claim 1, wherein The acquisition device for the voice control information further includes a communication interface circuit, and the master control unit establishes a communication connection with the host computer through the communication interface circuit.

10. A tobacco leaf curing barn control system, the tobacco leaf curing barn control system includes a tobacco leaf curing barn controller, and an acquisition device for voice control information according to any one of claims 1 to 9; Among them, The tobacco leaf curing barn controller is connected to the main control unit in the voice control information acquisition device.

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