CN115653575A - Method for measuring annular liquid level detection sound wave optimal frequency loudness - Google Patents
Method for measuring annular liquid level detection sound wave optimal frequency loudnessDownload PDFInfo
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Abstract
Description
Translated fromChinese技术领域technical field
本发明涉及到钻井工程技术领域，尤其涉及一种环空液面最佳探测声波频率及响度的测定方法。The invention relates to the technical field of drilling engineering, in particular to a method for measuring the frequency and loudness of sound waves for optimum detection of an annular liquid level.
背景技术Background technique
目前现场一般使用回声法测量环空液面，使用的高压气枪作为发声源，爆破声源能量较大，频率一般小于20Hz，该发声方式由于其发声的频率很低，响度很大，且频率响度、发声时间不可调，而低频声波衰减的慢，高频声波衰减的快，且接箍对高频声波反射更好，因此爆破声源具有很高的瞬时能量，对于深井、超深井测量有一定的优势，但在测量浅液面时发射的声波在环空内的能量过大，在浅液面的情况下难以衰减，容易在声波通道内持续震荡，使液面回波淹没在发射声波内，造成有效信息难以提取，导致液面位置误判。At present, the echo method is generally used to measure the liquid level in the annular space. The high-pressure air gun is used as the sound source. The energy of the blasting sound source is relatively large, and the frequency is generally less than 20 Hz. , The sounding time cannot be adjusted, but the low-frequency sound wave attenuates slowly, the high-frequency sound wave attenuates quickly, and the coupling is better at reflecting the high-frequency sound wave, so the blasting sound source has high instantaneous energy, which is suitable for deep well and ultra-deep well measurement. However, when measuring the shallow liquid level, the energy of the emitted sound wave in the annular space is too large, it is difficult to attenuate in the case of a shallow liquid level, and it is easy to continue to oscillate in the sound wave channel, so that the liquid level echo is submerged in the emitted sound wave , making it difficult to extract effective information, leading to misjudgment of the liquid level position.
并且次声波的穿透力较强，在接箍处的反射较弱，因此只能通过液面回波判断液面位置，环空声速难以确定，造成误差较大。In addition, the penetrating power of the infrasonic wave is strong, and the reflection at the collar is weak, so the position of the liquid surface can only be judged by the liquid surface echo, and the sound velocity in the annular space is difficult to determine, resulting in large errors.
发明内容Contents of the invention
本发明的目的在于克服现有技术存在的上述问题，提供一种环空液面探测声波最佳频率响度测定方法。本发明使用电磁式声波作为探测声源，可以改变发射声波的频率响度及发声时间，并确定不同液面高度对应的最佳探测频率响度。The purpose of the present invention is to overcome the above-mentioned problems existing in the prior art, and provide a method for measuring the optimal frequency loudness of sound waves for annular liquid level detection. The invention uses electromagnetic sound waves as the detection sound source, can change the frequency loudness and sounding time of emitted sound waves, and determine the best detection frequency loudness corresponding to different liquid level heights.
为实现上述目的，本发明采用的技术方案如下：To achieve the above object, the technical scheme adopted in the present invention is as follows:
一种环空液面探测声波最佳频率响度测定方法，其特征在于，包括如下步骤：A method for measuring the optimal frequency loudness of an annular liquid level detection sound wave, characterized in that it comprises the following steps:
a、计算环空液面位置：下钻至井底，灌浆至见返，液面在井口后开始起钻，计算环空液面深度；a. Calculate the position of the liquid level in the annular space: Drill down to the bottom of the well, grout until it returns, and start drilling after the liquid level is at the wellhead, and calculate the depth of the liquid level in the annular space;
b、计算环空声速：通过采集到的环空温度计算环空声速；b. Calculate the annular space sound velocity: calculate the annular space sound velocity through the collected annular space temperature;
c、发射调制探测声波：设定调制发声时间、频率和音频，通过功率放大器放大后由电磁式声波发射器向环空发射声波；c. Transmitting modulated detection sound waves: set the time, frequency and audio frequency of the modulated sounds, and after being amplified by the power amplifier, the sound waves will be emitted to the annular space by the electromagnetic sound wave transmitter;
d、确定某一液位下的最佳发声强度：声波在环空内沿钻杆向下传输，遇到接箍和液面时返回，对回波信号进行采集、滤波处理、分段处理后得到处理后的接箍回波及液面回波，根据接箍回波及液面回波，确定某一液位下的最佳发声强度；d. Determine the optimal sound intensity at a certain liquid level: the sound wave is transmitted down the drill pipe in the annular space, and returns when it encounters the coupling and the liquid surface, and the echo signal is collected, filtered, and segmented. Obtain the processed coupling echo and liquid level echo, and determine the optimal sounding intensity at a certain liquid level according to the coupling echo and liquid level echo;
e、确定某一液位下的最佳发声频率：以确定的最佳发声强度调制声波，重复步骤d，记录该液面深度下最佳的发声频率，得到该液面深度下最佳的发射响度和频率组合；e. Determine the best sounding frequency at a certain liquid level: modulate the sound wave with the determined best sounding intensity, repeat step d, record the best sounding frequency at the depth of the liquid level, and obtain the best emission at the depth of the liquid level loudness and frequency combination;
f、确定不同液位下的最佳发声响度及频率：每起出一柱钻杆后，坐卡，重复步骤a-e，记录不同液面深度下对应的最佳发声响度和频率组合。f. Determine the best sounding loudness and frequency at different liquid levels: After pulling out a string of drill pipes, sit on the jam, repeat steps a-e, and record the corresponding best sounding loudness and frequency combination at different liquid level depths.
所述步骤a中，利用公式
所述步骤b中，通过温度传感器采集到的环空温度Tem，计算环空声速C＝331.45+0.61Tem。In the step b, the velocity of sound in the annular space C=331.45+0.61Tem is calculated from the annular space temperature Tem collected by the temperature sensor.
所述步骤c中，分别调制发声时间为T0＝0.05s、频率f＝1500Hz声波，响度为100％，70％，50％，30％的音频，通过功率放大器放大后由电磁式声波发射器向环空发射。In the step c, respectively modulate the audio frequency whose sounding time is T0=0.05s, the frequency f=1500Hz sound wave, and the loudness is 100%, 70%, 50%, and 30%, and then amplified by the power amplifier and sent to the sound wave by the electromagnetic sound wave transmitter Ring launch.
所述步骤d中，声波传感器负责采集回波数据，当发出探测声波指令时，声波传感器开始采集数据，将此时定义为起始点T1，声波传感器以采样频率fs进行采样，采样时间为T(5≤T≤10)，采样信号为s(i)。In the described step d, the acoustic wave sensor is responsible for collecting the echo data. When the detection acoustic wave command is issued, the acoustic wave sensor starts to collect data, and this time is defined as the starting point T1, and the acoustic wave sensor samples with the sampling frequency fs, and the sampling time is T( 5≤T≤10), the sampling signal is s(i).
所述步骤d滤波处理中，将采样信号s(i)通过带通滤波器获得滤波后的信号sn(i)。In the filtering process in step d, the sampled signal s(i) is passed through a bandpass filter to obtain a filtered signal sn(i).
所述步骤d分段处理中，将滤波后的信号sn(i)分为两段，第一段为发射段，时间为：T1～T1+T0，发射段信号为M(t)，第二段为接收段，时间为：T1+T0～T-T1-T0，接收段信号为：s(t)。In the segmental processing of step d, the filtered signal sn(i) is divided into two sections, the first section is the transmission section, the time is: T1～T1+T0, the transmission section signal is M(t), and the second section is the transmission section. The segment is the receiving segment, the time is: T1+T0~T-T1-T0, and the receiving segment signal is: s(t).
所述步骤d中，对接箍回波与液面回波检测，将接收段信号s(t)与发射段信号M(t)进行检测，利用公式：In the step d, the coupling echo and the liquid surface echo are detected, and the receiving segment signal s(t) and the transmitting segment signal M(t) are detected, using the formula:
对R(τ)求极大值点，极大值最大点记为液面回波点Rmax，记录该点的时间为τ，则液面回波时间为T0+τ，环空液面深度为：L＝C*(T0+τ)/2，对比不同发声强度所对应的液面回波极大值点，取极大值最大的点对应的发声强度作为该液面深度下最佳发声强度A1。Find the maximum value point for R(τ), record the maximum maximum point as the liquid surface echo point Rmax, record the time of this point as τ, then the liquid surface echo time is T0+τ, and the annular liquid surface depth is : L=C*(T0+τ)/2, compare the maximum value points of the liquid surface echo corresponding to different sounding intensities, and take the sounding intensity corresponding to the point with the largest maximum value as the best sounding intensity at the depth of the liquid surfaceA1 .
所述步骤e中，确定最佳发声强度后，分别调制发声时间为T0＝0.05s、响度为A1，频率为f＝1500-50n，(n＝1,2,3,...,26)的声波，重复步骤d，记录该液面深度下最佳的发声频率F1，得到该液面深度下最佳的发射响度和频率组合(L1,A1,F1)。In the step e, after determining the optimal sounding intensity, respectively modulate the sounding time as T0=0.05s, the loudness as A1 , and the frequency as f=1500-50n, (n=1,2,3,...,26 ) sound wave, repeat step d, record the best sounding frequency F1 at the liquid surface depth, and obtain the best emission loudness and frequency combination (L1 , A1 , F1 ) at the liquid surface depth.
所述步骤f中，每起出一柱钻杆后，坐卡，重复步骤a-e，记录不同液面深度下对应的最佳发声响度和频率组合(Ln,An,Fn)，直到起出n+1柱后环空液面深度Ln+1与Ln相比无变化。In the step f, after pulling out a string of drill pipes, sit on the card, repeat steps ae, and record the corresponding optimal sounding loudness and frequency combination (Ln , An , Fn ) at different liquid level depths, until The annulus liquid level depth Ln+1 has no change compared with Ln after the n+1 column is pulled out.
采用本发明的优点如下：Adopt the advantage of the present invention as follows:
1、传统爆破式发声法不可调节频率响度，本发明采用电磁式声波发射器作为发声源，发射声波频率响度可以调节，能够有效提升浅液面的识别效果。1. The frequency loudness cannot be adjusted in the traditional explosive sounding method. The present invention uses an electromagnetic sound wave transmitter as the sound source, and the frequency loudness of the emitted sound wave can be adjusted, which can effectively improve the recognition effect of the shallow liquid surface.
2、本发明可根据发射声波的频率精确滤波，减弱噪声干扰。2. The present invention can filter accurately according to the frequency of emitted sound waves, and reduce noise interference.
3、本发明采用的互相关检测方法能提高回波的识别率。3. The cross-correlation detection method adopted in the present invention can improve the recognition rate of echoes.
4、本发明采用温度传感器实时监测环空温度，能够实时计算环空声速，减小液面计算误差。4. The present invention uses a temperature sensor to monitor the temperature of the annular space in real time, which can calculate the sound velocity of the annular space in real time and reduce the calculation error of the liquid level.
5、对于不同的环空液位，不同频率不同响度的探测声波所对应的回波不同，本发明可以测定不同液位下最佳的发射频率及响度，为实际液面探测推荐最佳频率及响度。5. For different annular liquid levels, the echoes corresponding to the detection sound waves of different frequencies and loudness are different. The present invention can measure the best emission frequency and loudness under different liquid levels, and recommend the best frequency and sound for actual liquid level detection. loudness.
附图说明Description of drawings
图1为气枪法探测回波信号图；Fig. 1 is the air gun method detection echo signal diagram;
图2a为频率300Hz响度100％调制声波回波信号回波时域图；Figure 2a is a time-domain diagram of the echo signal of the modulated acoustic echo signal with a frequency of 300 Hz and a loudness of 100%;
图2b为频率300Hz响度100％调制声波回波信号相关性检测图；Figure 2b is a correlation detection diagram of the frequency 300Hz loudness 100% modulated acoustic echo signal;
图3a为频率500Hz响度100％调制声波回波信号回波时域图；Figure 3a is a time-domain diagram of the echo signal echo of the frequency 500Hz loudness 100% modulation sound wave echo;
图3b为频率300Hz响度100％调制声波回波信号相关性检测图；Figure 3b is a correlation detection diagram of the frequency 300Hz loudness 100% modulated acoustic echo signal;
图4为本发明方法流程示意图；Fig. 4 is a schematic flow chart of the method of the present invention;
图5为本发明方法在应用时涉及到的装置示意图。Fig. 5 is a schematic diagram of the device involved in the application of the method of the present invention.
具体实施方式Detailed ways
实施例1Example 1
由于不同频率响度的声波在不同液面高度的情况下的传播规律不同，为确保电磁式声波发射器能在不同液位条件下发射最佳探测频率及响度，本发明提供以下方法确定最佳频率响度。Since sound waves of different frequencies and loudness have different propagation laws at different liquid level heights, in order to ensure that the electromagnetic sound wave transmitter can emit the best detection frequency and loudness under different liquid level conditions, the present invention provides the following method to determine the best frequency loudness.
如图4所示，最佳频率响度测试方法如下：As shown in Figure 4, the best frequency loudness test method is as follows:
1、计算环空液面位置。1. Calculate the position of the liquid level in the annular space.
先下钻至井底，灌浆至见返，保证液面在井口后开始起钻，利用公式
2、计算环空声速。2. Calculate the velocity of sound in the annular space.
记录温度传感器数据Tem，计算声速C＝331.45+0.61Tem。Record temperature sensor data Tem, calculate sound velocity C=331.45+0.61Tem.
3、通过电磁式声波发射器发射调制探测声波。3. Emit the modulated detection sound wave through the electromagnetic sound wave transmitter.
通过电脑分别调制发声时间为T0＝0.05s、频率f＝1500Hz声波，响度为100％，70％，50％，30％的音频，通过功率放大器放大后由电磁式声波发射器发射。The sound waves with sounding time of T0=0.05s, frequency f=1500Hz, and loudness of 100%, 70%, 50%, and 30% are respectively modulated by the computer, amplified by the power amplifier and emitted by the electromagnetic sound wave transmitter.
4、确定某一液位下的最佳发声强度。4. Determine the optimum sound intensity at a certain liquid level.
声波在环空内沿钻杆向下传输，遇到接箍和液面时返回，对回波信号进行采集、滤波、短时能量计算后得到处理后的有效回波(接箍回波及液面回波)The sound wave travels down the drill pipe in the annulus and returns when it encounters the collar and the liquid surface. The echo signal is collected, filtered, and short-term energy calculated to obtain the processed effective echo (coupling echo and liquid surface) echo)
401：声波传感器负责采集回波数据，当电脑发出探测声波指令时，声波传感器开始采集数据，将此时定义为起始点T1，数据采集器以采样频率fs进行采样，采样时间为T(5≤T≤10)，采样信号为s(i)。401: The acoustic wave sensor is responsible for collecting echo data. When the computer sends out an instruction to detect sound waves, the acoustic wave sensor starts to collect data. This time is defined as the starting point T1. The data collector performs sampling at the sampling frequency fs, and the sampling time is T(5≤ T≤10), the sampling signal is s(i).
402：滤波处理：将采样信号s(i)通过带通滤波器获得滤波后的信号sn(i)，滤波器的通带范围为20～30Hz。402: Filtering processing: pass the sampling signal s(i) through a band-pass filter to obtain a filtered signal sn(i), where the pass-band range of the filter is 20-30 Hz.
403：分段处理：将滤波后的信号sn(i)分为两段，第一段为发射段，时间为：T1～T1+T0，发射段信号为M(t)，第二段为接收段，时间为：T1+T0～T-T1-T0，接收段信号为：s(t)。403: Segmentation processing: Divide the filtered signal sn(i) into two sections, the first section is the transmission section, the time is: T1~T1+T0, the transmission section signal is M(t), and the second section is the reception section segment, the time is: T1+T0～T-T1-T0, and the receiving segment signal is: s(t).
404：接箍波与液面回波检测：将接收段信号s(t)与发射段信号M(t)进行相关性检测，利用公式：404: Coupling wave and liquid surface echo detection: Correlation detection between the signal s(t) of the receiving section and the signal M(t) of the transmitting section, using the formula:
对R(τ)求极大值点，极大值最大点记为液面回波点Rmax，记录该点的时间为τ，则液面回波时间为T0+τ，环空液面深度为：L＝C*(T0+τ)/2，对比不同发声强度所对应的液面回波极大值点，取极大值最大的点对应的发声强度作为该液面深度下最佳发声强度A1。Find the maximum value point for R(τ), record the maximum maximum point as the liquid surface echo point Rmax, record the time of this point as τ, then the liquid surface echo time is T0+τ, and the annular liquid surface depth is : L=C*(T0+τ)/2, compare the maximum value points of the liquid surface echo corresponding to different sounding intensities, and take the sounding intensity corresponding to the point with the largest maximum value as the best sounding intensity at the depth of the liquid surfaceA1 .
5、确定某一液位下的最佳发声频率。5. Determine the best sounding frequency at a certain liquid level.
确定好发声强度后，通过电脑分别调制发声时间为T0＝0.05s、响度为A1，频率为f＝1500-50n，(n＝1,2,3,...,26)的声波，重复步骤4，记录该液面深度下最佳的发声频率F1，得到该液面深度下最佳的发射响度、频率组合(L1,A1,F1)。After determining the intensity of the sound, modulate the sound wave with the sound time T0=0.05s, the loudness A1 , the frequency f=1500-50n, (n=1,2,3,...,26) through the computer, repeat Step 4, record the best sounding frequency F1 at the liquid surface depth, and obtain the best emission loudness and frequency combination (L1 , A1 , F1 ) at the liquid surface depth.
6、确定不同液位下的最佳发声响度及频率。6. Determine the best sounding loudness and frequency under different liquid levels.
每起出一柱钻杆后，坐卡，重复步骤1-5，记录不同液面深度下对应的最佳发声响度和频率组合(Ln,An,Fn)，直到起出n+1柱后环空液面深度Ln+1与Ln相比无变化。After pulling out a string of drill pipes, sit on the card, repeat steps 1-5, and record the best sounding loudness and frequency combination (Ln , An , Fn ) corresponding to different liquid surface depths until
实施例2Example 2
本实施例结合附图，对本发明的具体应用例进行说明。This embodiment describes specific application examples of the present invention with reference to the accompanying drawings.
一种环空液面探测声波最佳频率响度测定方法，包括：A method for measuring the optimal frequency loudness of an annular liquid level detection sound wave, comprising:
1、下钻至井底，灌浆至见返，液面在井口后开始起钻，计算环空液面深度，利用公式
2、在节流管汇处安装气枪式环空液面监测仪，反射探测声波并记录相应回波，回波信号如图1所示。探测波由于在环空内衰减过慢，造成液面回波淹没在发射波内，难以辨别准确的液面回波起始点。2. Install an air gun-type annular liquid level monitor at the choke manifold to reflect and detect sound waves and record corresponding echoes. The echo signals are shown in Figure 1. Due to the slow attenuation of the detection wave in the annular space, the liquid level echo is submerged in the launching wave, and it is difficult to distinguish the exact starting point of the liquid level echo.
3、在相同位置安装电磁式声波发射器。3. Install the electromagnetic sound wave transmitter at the same position.
a、计算环空声速：温度传感器为16℃，则环空声速为a. Calculate the sound velocity in the annular space: if the temperature sensor is 16°C, the sound velocity in the annular space is
C(16℃)＝331.45+0.61*16＝341.21m/sC(16℃)＝331.45+0.61*16＝341.21m/s
b、利用电磁式声波发射器发射不同频率响度组合的探测声波，声波在环空内沿钻杆向下传输，遇到接箍和液面时返回，对回波信号进行采集、滤波后如图2(a)，图3(a)所示，进行相关性检测后得到相关性检测图如图2(b)，图3(b)所示，其液面回波时间为0.92s，则环空液面深度为：b. Use the electromagnetic sound wave transmitter to emit detection sound waves with different frequency loudness combinations. The sound waves are transmitted down the drill pipe in the annular space and return when they meet the collar and the liquid surface. The echo signals are collected and filtered as shown in the figure 2(a), as shown in Figure 3(a), the correlation detection diagram obtained after the correlation detection is shown in Figure 2(b), as shown in Figure 3(b), the liquid surface echo time is 0.92s, then the ring The empty liquid level depth is:
c、由图2(b)、图3(b)可知，当频率为300Hz响度100％时，液面回波相关检测值为1502，当频率为500Hz响度100％时，液面回波相关检测值为612，因此当环空液面深度为156m时，最佳的探测声波组合为300Hz，100％响度。c. From Figure 2(b) and Figure 3(b), it can be seen that when the frequency is 300Hz and the loudness is 100%, the liquid level echo related detection value is 1502; when the frequency is 500Hz and the loudness is 100%, the liquid level echo related detection The value is 612, so when the depth of the liquid surface in the annular space is 156m, the best sound wave combination for detection is 300Hz, 100% loudness.
探测声波频率响度组合有多个，在此列举了最优组合与其中一个组合，因此，并不局限于上述应用。There are many combinations of frequency loudness of detection sound waves, and the optimal combination and one of them are listed here, so the application is not limited to the above.
实施例3Example 3
本实施例对本发明中的方法涉及到的装置进行说明。This embodiment describes the devices involved in the method of the present invention.
本发明方法涉及到的装置包括中央处理器、前置功率放大器、后置功率放大器、电磁式声波发射器、声波传感器、温度传感器、电磁阀、数据采集器及滤波器。The device involved in the method of the invention includes a central processing unit, a pre-power amplifier, a post-power amplifier, an electromagnetic sound wave transmitter, a sound wave sensor, a temperature sensor, an electromagnetic valve, a data collector and a filter.
如图5所示，图中标记为：1-井筒，2-钻杆，3-环空，4-接箍，5-液面，6-电磁阀，7-声波传感器，8-温度传感器，9-电磁式声波发射器，10-数据采集器，11-滤波器，12-后级功率放大器，13-前级功率放大器，14-中央处理器，15-录井数据。As shown in Figure 5, the marks in the figure are: 1-wellbore, 2-drill pipe, 3-annulus, 4-coupling, 5-liquid level, 6-solenoid valve, 7-acoustic sensor, 8-temperature sensor, 9-electromagnetic sound wave transmitter, 10-data collector, 11-filter, 12-post-stage power amplifier, 13-pre-stage power amplifier, 14-central processing unit, 15-mud logging data.
中中央处理器调制探测声波、分析回波、控制电磁阀开关及计算计算环空液面位置，所发射的探测声波能根据井身结构及液面深度自动选择最佳频率及响度。The central processing unit modulates the detection sound wave, analyzes the echo, controls the solenoid valve switch and calculates the position of the liquid level in the annular space. The detection sound wave emitted can automatically select the optimal frequency and loudness according to the wellbore structure and the depth of the liquid level.
前置功率放大器能将中央处理器输出的调制音频信号电压放大，能提高系统的信噪比，减少外界的干扰并实现阻抗转换与匹配。The pre-power amplifier can amplify the modulated audio signal voltage output by the central processing unit, improve the signal-to-noise ratio of the system, reduce external interference and realize impedance conversion and matching.
后置功率放大器负责将前级功率放大器输出的音频信号电流放大，使电磁式声波发射器正常工作。The rear power amplifier is responsible for amplifying the audio signal current output by the front power amplifier to make the electromagnetic sound wave transmitter work normally.
电磁式声波发射器负责发出后置功率放大器输出的音频信号，其特征在于频率及响度可调，频率范围在200～1500Hz，频响范围为70～130dB。The electromagnetic sound wave transmitter is responsible for sending out the audio signal output by the rear power amplifier, which is characterized in that the frequency and loudness are adjustable, the frequency range is 200-1500Hz, and the frequency response range is 70-130dB.
声波传感器负责采集通道内的发射声波及回波信号，声波传感器与电磁式声波发射器处于同一个通道内，其数量可以有一个或多个，其灵敏度不同，单一声波发射器对某一特定频率范围内的声波信号敏感。The acoustic wave sensor is responsible for collecting the emitted sound waves and echo signals in the channel. The acoustic wave sensor and the electromagnetic sound wave transmitter are in the same channel. There can be one or more of them, and their sensitivities are different. Sensitive to acoustic signals within the range.
温度传感器负责采集音频传感器所在通道内的温度，用于声速计算，与声波传感器与电磁式声波发射器在同一通道内。The temperature sensor is responsible for collecting the temperature in the channel where the audio sensor is located for the calculation of sound velocity, and is in the same channel as the sound wave sensor and the electromagnetic sound wave transmitter.
电磁阀负责开通或关断电磁式声波发射器与环空相连的通道，可以根据监测任务需要而自动打开或关闭，有一定的承压能力，能阻挡泥浆进入电磁式声波发射器所在的通道内。The solenoid valve is responsible for opening or closing the channel connecting the electromagnetic sound wave transmitter and the annular space. It can be automatically opened or closed according to the needs of the monitoring task. It has a certain pressure bearing capacity and can prevent mud from entering the channel where the electromagnetic sound wave transmitter is located. .
数据采集器负责采集电磁阀、温度传感器、声波传感器的信号。The data collector is responsible for collecting the signals of the solenoid valve, temperature sensor and acoustic wave sensor.
滤波器负责将数据采集器采集到的声波信号进行相应的滤波，可以将电磁式声波发射器发出的频率范围外的信号滤掉，能减少噪声信号，提高信噪比。The filter is responsible for filtering the sound wave signal collected by the data collector, and can filter out the signal outside the frequency range emitted by the electromagnetic sound wave transmitter, which can reduce the noise signal and improve the signal-to-noise ratio.
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