CN115639125B - Sludge concentration detection system and method - Google Patents
Sludge concentration detection system and method Download PDFInfo
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- CN115639125B CN115639125B CN202211670203.2A CN202211670203A CN115639125B CN 115639125 B CN115639125 B CN 115639125B CN 202211670203 A CN202211670203 A CN 202211670203A CN 115639125 B CN115639125 B CN 115639125B
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Abstract
The invention provides a sludge concentration detection system and a method, which belong to the technical field of sludge concentration detection, wherein the sludge concentration detection method is realized by the sludge concentration detection system, and the system comprises the following steps: a stirring device; the first conveying pump and the second conveying pump are respectively arranged on two opposite sides of the top of the tank body; one end of the first return pipe is connected with the first delivery pump, and the other end of the first return pipe is communicated with the interior of the tank body; one end of the second return pipe is connected with the second delivery pump, and the other end of the second return pipe is communicated with the interior of the tank body; the first sludge concentration sensor group is arranged on the first return pipe; the second sludge concentration sensor group is arranged on the second return pipe; and the processor is respectively connected with the first sludge concentration sensor group and the second sludge concentration sensor group. And comparing the detection data by the processor, taking the average value of the detection data as a sludge concentration detection result when the detection data are consistent, and ensuring the reliability and accuracy of the detection result under the condition that the sludge concentration in the tank body is uniform.
Description
Technical Field
The invention relates to the technical field of sludge concentration detection, in particular to a sludge concentration detection system and a method.
Background
At present, when the concentration of sludge in the tank body of a sewage tank is detected, a sludge concentration sensor, a sludge concentration detector and other detection devices are usually adopted for detection, and in the detection process, the sludge and the sewage are precipitated and layered due to gravity and density, so that the concentration of the sludge in each position in the tank body is uneven, and the detection result is influenced; thus, the present invention aims to provide a means for detecting the concentration of sludge in a tank where the concentration of sludge in the tank is uniform.
Disclosure of Invention
The invention provides a system and a method for detecting sludge concentration, which are used for detecting the sludge concentration under the condition that the sludge concentration in a tank body is uniform, so that the reliability and the accuracy of a detection result are ensured.
An aspect of embodiments of the present specification discloses a sludge concentration detection system, comprising:
the stirring device is used for stirring the sewage in the tank body;
the first conveying pump and the second conveying pump are respectively arranged on two opposite sides of the top of the tank body and are respectively communicated with the inside of the tank body on one side of each conveying pump through pipelines;
one end of the first return pipe is connected with the first delivery pump, and the other end of the first return pipe is communicated with the interior of the tank body;
One end of the second return pipe is connected with the second delivery pump, and the other end of the second return pipe is communicated with the interior of the tank body;
the first sludge concentration sensor group is arranged on the first return pipe so as to detect the sludge concentration of the sewage in the first return pipe;
the second sludge concentration sensor group is arranged on the second return pipe so as to detect the sludge concentration of the sewage in the second return pipe;
and the processor is respectively connected with the first sludge concentration sensor group and the second sludge concentration sensor group so as to receive the detection data of the first sludge concentration sensor group and the second sludge concentration sensor group, compare the detection data, and take the average value of the detection data as a sludge concentration detection result if the detection data are consistent.
In one embodiment disclosed in the specification, a third delivery pump is arranged at the top of the tank body, the third delivery pump is located between the first delivery pump and the second delivery pump, the input end of the third delivery pump is communicated with the inner part of the tank body below the third delivery pump through a pipeline, the output end of the third delivery pump is respectively communicated with the first return pipe and the second return pipe through pipelines, and two communication points are respectively located between the first delivery pump and the first sludge concentration sensor group and between the second delivery pump and the second sludge concentration sensor group.
In one embodiment disclosed in the present specification, the stirring device includes:
the first stirring mechanism is arranged between the first conveying pump and the third conveying pump;
and the second stirring mechanism is arranged between the second conveying pump and the third conveying pump.
In one embodiment disclosed in the specification, a third sludge concentration sensor group is arranged on the side surface of the tank body, and a detection transmitting end and a detection receiving end of the third sludge concentration sensor group are respectively arranged on two opposite sides of the tank body so as to detect the sludge concentration of sewage between the two sides.
In one embodiment disclosed in the present specification, the first sludge concentration sensor group and/or the second sludge concentration sensor group and/or the third sludge concentration sensor group include at least one photoelectric sludge concentration sensor and at least one ultrasonic sludge concentration sensor.
Another aspect of the embodiments of the present specification discloses a method for detecting a sludge concentration, using the sludge concentration detection system of any one of the above-mentioned embodiments;
the sludge concentration detection method comprises the following steps:
s1, stirring sewage in a tank body through a stirring device;
s2, respectively pumping out sewage at two opposite sides in the tank body through a first conveying pump, a second conveying pump, a first return pipe, a second return pipe, a first sludge concentration sensor group and a second sludge concentration sensor group, and detecting the sludge concentration to obtain the sludge concentration of the sewage at two opposite sides in the tank body;
S3, comparing the sludge concentrations of the sewage at the two opposite sides in the tank body through the processor, and taking the average value of the sewage at the two sides as the sludge concentration if the sludge concentrations of the sewage at the two sides are consistent; otherwise, repeating the steps S1-S2 until the sludge concentration of the sewage at the two sides is consistent, and taking the average value of the two as the sludge concentration;
s4, taking the sludge concentration obtained in the step S3 as a first sludge concentration, stopping stirring, and after the sewage in the tank body is restored to a relatively static state before stirring, executing the step S1 to the step S3 again, and taking the sludge concentration obtained in the step S3 as a second sludge concentration;
s5, comparing the first sludge concentration with the second sludge concentration through a processor, and taking the average value of the first sludge concentration and the second sludge concentration as a sludge concentration detection result if the first sludge concentration is consistent with the second sludge concentration; otherwise, repeating S1-S4 until the first sludge concentration and the second sludge concentration are consistent, and taking the average value of the first sludge concentration and the second sludge concentration as a sludge concentration detection result.
In one embodiment disclosed in the present specification, the sludge concentration detection method further includes the steps of:
s6, respectively arranging third sludge concentration sensor groups at different heights of the tank body so as to directly detect the sludge concentrations of the sewage at different heights in the tank body;
S7, comparing the sludge concentrations of the sewage with different heights through a processor, and taking the average value of the first sludge concentration and the second sludge concentration obtained in the S5 as a sludge concentration detection result if the sludge concentrations of the sewage with different heights are consistent; otherwise, repeating S1-S6 until the sludge concentration of the sewage at different heights is consistent.
In one embodiment disclosed in the specification, in S7, if the sludge concentrations of the sewage at different heights are consistent, taking a mean value of the sludge concentrations of the sewage at different heights, comparing the mean value with the mean value of the first sludge concentration and the second sludge concentration obtained in S5, and if the mean value of the sludge concentrations of the sewage at different heights is consistent with the mean value of the first sludge concentration and the second sludge concentration, taking the mean value of the two as a sludge concentration detection result; otherwise, repeating S1-S6 until the average value of the sludge concentration of the sewage with different heights is consistent with the average value of the first sludge concentration and the second sludge concentration.
In one embodiment disclosed in the present specification, in S2, the sewage at the intermediate position between the opposite sides in the tank is pumped out, and mixed with the sewage at the opposite sides in the tank, respectively, and then the sludge concentration is detected.
The embodiment of the specification can at least realize the following beneficial effects:
1. according to the invention, the sludge concentration of sewage at two opposite sides in the tank body is respectively detected through the stirring device, the first conveying pump, the second conveying pump, the first return pipe, the second return pipe, the first sludge concentration sensor group and the second sludge concentration sensor group, the detection data are compared by the processor, and when the detection data are consistent, the average value of the detection data is taken as a sludge concentration detection result; at this time, the concentration of the sludge in the tank body is considered to be uniform, so that the reliability and the accuracy of the detection result are ensured.
2. The invention respectively extracts the sewage at two opposite sides in the tank body, carries out sludge concentration detection to obtain and compare the sludge concentrations of the sewage at two opposite sides in the tank body, and takes the average value of the two as the sludge concentration if the sludge concentrations are consistent; then, after the sewage in the tank body is restored to a relatively static state before stirring, S1-S3 are executed again; the first sludge concentration and the second sludge concentration are obtained and compared, and if the sludge concentrations are consistent, the average value of the first sludge concentration and the second sludge concentration is taken as a sludge concentration detection result; otherwise, repeating S1-S4 until the sludge concentration is consistent. At this time, the concentration of the sludge in the tank body is considered to be uniform, so that the reliability and the accuracy of the detection result are ensured.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic block diagram of a sludge concentration detection system according to some embodiments of the present invention.
Fig. 2 is a schematic structural diagram of a sludge concentration detection system according to some embodiments of the present invention.
Fig. 3 is a schematic diagram illustrating steps of a method for detecting sludge concentration according to some embodiments of the present invention.
Fig. 4 is a schematic side view of a third sludge concentration sensor assembly in accordance with some embodiments of the present invention.
Fig. 5 is a schematic distribution diagram of a third sludge concentration sensor group according to some embodiments of the present invention.
FIG. 6 is a schematic illustration of the misalignment of stirring vanes involved in some embodiments of the present invention.
FIG. 7 is a schematic top view of a plurality of stirring vanes in a helical configuration according to some embodiments of the present invention.
Fig. 8 is a schematic diagram of a microcontroller U1 and a display screen LCD1 in a circuit of an ultrasonic sludge concentration sensor according to some embodiments of the present invention.
Fig. 9 is a schematic diagram of a transmitting transducer J1 in the circuit of an ultrasonic sludge concentration sensor according to some embodiments of the present invention.
Fig. 10 is a schematic diagram of a voltage stabilizing chip U3 in a circuit of an ultrasonic sludge concentration sensor according to some embodiments of the present invention.
Fig. 11 is a schematic diagram of a receiving transducer J2 and a logarithmic amplifier U6 in the circuit of an ultrasonic sludge concentration sensor according to some embodiments of the present invention.
Fig. 12 is a schematic diagram of an electrical circuit of an optoelectronic sludge concentration sensor in accordance with some embodiments of the present invention.
Reference numerals:
1. a stirring device; 11. a first stirring mechanism; 12. a second stirring mechanism;
2. a first transfer pump; 21. a first return pipe;
3. a second transfer pump; 31. a second return pipe;
4. a third transfer pump;
5. a first sludge concentration sensor group;
6. a second sludge concentration sensor group;
7. a third sludge concentration sensor group;
8. a cell body;
100. a motor; 200. a stirring rod; 300. stirring the leaves; 400. a photoelectric sludge concentration sensor; 500. an ultrasonic sludge concentration sensor.
Detailed Description
Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships conventionally placed in use of the product of the present invention, or orientations or positional relationships conventionally understood by those skilled in the art, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Furthermore, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, an aspect of the embodiments of the present specification discloses a sludge concentration detection system, comprising:
the stirring device 1 is used for stirring sewage in the tank body 8;
The first conveying pump 2 and the second conveying pump 3 are respectively arranged on two opposite sides of the top of the tank body 8 and are respectively communicated with the inside of the tank body 8 on one side of each through pipelines;
a first return pipe 21, one end of which is connected to the first transfer pump 2, and the other end of which is communicated with the interior of the tank 8;
a second return pipe 31, one end of which is connected with the second delivery pump 3, and the other end of which is communicated with the interior of the tank body 8;
a first sludge concentration sensor group 5 provided on the first return pipe 21 to detect the sludge concentration of the sewage in the first return pipe 21;
a second sludge concentration sensor group 6 provided on the second return pipe 31 to detect the sludge concentration of the sewage in the second return pipe 31;
and the processor is respectively connected with the first sludge concentration sensor group 5 and the second sludge concentration sensor group 6 to receive the detection data of the first sludge concentration sensor group 5 and the second sludge concentration sensor group 6, compare the detection data, and take the average value of the detection data as a sludge concentration detection result if the detection data are consistent.
It should be understood that the processor, the stirring device 1, the first transfer pump 2, the second transfer pump 3, the first return pipe 21, the second return pipe 31, the first sludge concentration sensor group 5 and the second sludge concentration sensor group 6 may use existing solutions or those in the embodiments described below.
The working process of the sludge concentration detection system is as follows:
the processor is connected with the stirring device 1, the first conveying pump 2, the second conveying pump 3, the first sludge concentration sensor group 5 and the second sludge concentration sensor group 6 to control the work of the stirring device, the first conveying pump and the second conveying pump.
The sewage in the tank body 8 is stirred through the stirring device 1, in the stirring process, the first conveying pump 2 and the second conveying pump 3 are started, the first conveying pump 2 pumps the sewage in the tank body 8 on one side where the first conveying pump 2 is positioned (such as the sewage right below the first conveying pump 2 shown in fig. 2) and discharges the sewage to the first return pipe 21, the sewage returns to the tank body 8 through the first return pipe 21, and the first sludge concentration sensor group 5 detects the sludge concentration of the sewage in the first return pipe 21 to obtain first detection data; the second delivery pump 3 pumps the sewage in the tank body 8 at one side of the second delivery pump (such as the sewage right below the second delivery pump 3 shown in fig. 2) and discharges the sewage to the second return pipe 31, and the sewage returns to the tank body 8 through the second return pipe 31, wherein the second sludge concentration sensor group 6 detects the sludge concentration of the sewage in the second return pipe 31 to obtain second detection data; the processor receives the first detection data and the second detection data and compares the first detection data with the second detection data, if the first detection data and the second detection data are consistent, the average value of the detection data is taken as the sludge concentration in the tank body 8, the detected sludge concentration is considered to be detected under the condition that the sludge concentration in the tank body 8 is uniform, and the reliability and the accuracy of a detection result are ensured; otherwise, the detection is performed again.
It will be appreciated that in practical applications, a systematic error is allowed, i.e. "coincidence" means that the difference between the two is within the allowable error range, and is considered to be coincidence; and because different sludge concentration detecting instruments have different detection precision and different process requirements of the tank body 8, the allowable error range does not have a uniquely determined range, namely, the allowable error range can be set according to practical conditions, for example, 50mg/L, if the difference value of the allowable error range and the allowable error range is less than or equal to 50mg/L, the difference value of the allowable error range and the allowable error range is considered to be within the allowable error range, namely, the allowable error range and the allowable error range are considered to be consistent when comparing and judging.
In some embodiments, the top of the tank body 8 is provided with a third delivery pump 4, the third delivery pump 4 is located between the first delivery pump 2 and the second delivery pump 3, the input end of the third delivery pump 4 is communicated with the interior of the tank body 8 below the third delivery pump 4 through a pipeline, the output end of the third delivery pump 4 is respectively communicated with the first return pipe 21 and the second return pipe 31 through a pipeline, and two communication points are respectively located between the first delivery pump 2 and the first sludge concentration sensor group 5 and between the second delivery pump 3 and the second sludge concentration sensor group 6.
In this embodiment, the third transfer pump 4 is located at the middle position between the first transfer pump 2 and the second transfer pump 3, and sewage (sewage directly below as shown in fig. 2) in the tank body 8 below the third transfer pump 4 is respectively introduced into the first return pipe 21 and the second return pipe 31, so that after the sewage on one side in the tank body 8 is mixed with the middle sewage, the sludge concentration is detected, and first detection data are obtained; mixing the sewage at the other side of the inner part of the tank body 8 with the sewage in the middle, and then detecting the concentration of the sludge to obtain second detection data; after the comparison, the obtained comparison result and the detection result are more reliable and accurate.
In some embodiments, the stirring device 1 comprises:
a first stirring mechanism 11 provided between the first transfer pump 2 and the third transfer pump 4;
the second stirring mechanism 12 is provided between the second transfer pump 3 and the third transfer pump 4.
In this embodiment, the first stirring mechanism 11 and the second stirring mechanism 12 are configured to stir the sewage in the tank body 8 more uniformly, that is, the first stirring mechanism 11 and the second stirring mechanism 12 can synchronously act, and can rotate in the same direction or in opposite directions during the synchronous action; that is, the sludge concentrations of the sewage pumped by the first transfer pump 2, the second transfer pump 3, and the third transfer pump 4 can be made uniform as much as possible. The obtained comparison result and the detection result are more reliable and accurate.
In some embodiments, the first stirring mechanism 11 and the second stirring mechanism 12 each include a motor 100, a stirring rod 200 and a plurality of stirring blades 300, where the motor 100 is disposed at the top of the tank body 8, the stirring rod 200 is rotatably and vertically disposed inside the tank body 8 and connected with the motor 100, and the plurality of stirring blades 300 are symmetrically or dislocated disposed on two opposite sides of the stirring rod 200 (as shown in fig. 6), or the plurality of stirring blades 300 are spirally and obliquely disposed downwards along the circumferential surface of the stirring rod 200 (as shown in fig. 7), and the downward spiral structure plays a role similar to a propeller, so that when the stirring rod 200 is driven by the motor 100 to drive the stirring blades 300 to rotate, the stirring blades 300 generate a downward thrust on the sewage, so as to push the sewage to impact the sludge at the bottom of the tank body 8 downwards, so that the sludge can be fully mixed with the sewage, that is, and uniform stirring is ensured. The obtained comparison result and the detection result are more reliable and accurate.
In some embodiments, as shown in fig. 4 and 5, a third sludge concentration sensor group 7 is disposed on the side of the tank body 8, and a detection transmitting end and a detection receiving end of the third sludge concentration sensor group 7 are respectively disposed on two opposite sides of the tank body 8 to detect the sludge concentration of the sewage between the two sides.
In this embodiment, the sludge concentration of the sewage between the two opposite sides of the tank body 8 is directly detected by the third sludge concentration sensor group 7, and the sludge concentration is respectively compared with the first detection data and the second detection data, and if the two detection data are consistent, the average value of the three is used as the sludge concentration in the tank body 8 (namely, the detection result); otherwise, the three are detected again. The obtained comparison result and the detection result are more reliable and accurate.
In some embodiments, as shown in fig. 4 and 5, the third sludge concentration sensor group 7 has a plurality of groups and is respectively distributed at different heights of the tank 8, so as to detect the sludge concentration of the sewage at different heights of the tank 8.
In this embodiment, as shown in fig. 4 and 5, the third sludge concentration sensor group 7 is distributed at different levels and different horizontal positions on the same height, that is, may be rectangular array distribution.
There are at least two applications, the first: comparing the sludge concentrations of the sewage with different heights, if the sludge concentrations are consistent, considering that the sewage in the tank body 8 is uniformly stirred, namely taking the average value of the first detection data and the second detection data as the sludge concentration in the tank body 8 (namely, the detection result); otherwise, the first detection data, the second detection data and the sludge concentration of the sewage with different heights are re-detected. The obtained comparison result and the detection result are more reliable and accurate.
A second application: comparing the sludge concentrations of the sewage with different heights, if the sludge concentrations are consistent, taking the average value of the sludge concentrations of the sewage with different heights, comparing the average value with the average value of the first detection data and the second detection data, and if the sludge concentrations are consistent, taking the average value of the first detection data and the second detection data as the sludge concentration in the tank body 8 (namely, the detection result); otherwise, all re-detection is performed. The obtained comparison result and the detection result are more reliable and accurate.
In some embodiments, the first sludge concentration sensor set 5 and/or the second sludge concentration sensor set 6 and/or the third sludge concentration sensor set 7 comprise at least one photoelectric sludge concentration sensor 400 and at least one ultrasonic sludge concentration sensor 500.
In this embodiment, "at least one" means that there are one or more (more than one); that is, one or more photoelectric sludge concentration sensors 400 and ultrasonic sludge concentration sensors 500 are arranged on the first return pipe 21 and/or the second return pipe 31, and one or more photoelectric sludge concentration sensors 400 and ultrasonic sludge concentration sensors 500 are arranged on the side surface of the tank body 8.
When the first return pipe 21 and/or the second return pipe 31 are/is provided with a photoelectric sludge concentration sensor 400 and an ultrasonic sludge concentration sensor 500, comparing the detection data of the photoelectric sludge concentration sensor 400 with the detection data of the ultrasonic sludge concentration sensor 500, and if the detection data are consistent, taking the average value of the detection data and the detection data as first detection data or second detection data; otherwise, re-detecting.
When the first return pipe 21 and/or the second return pipe 31 are provided with a plurality of photoelectric sludge concentration sensors 400 and ultrasonic sludge concentration sensors 500, comparing the detection data of the photoelectric sludge concentration sensors 400, and if the detection data are consistent, taking the average value as a first average value; otherwise, re-detecting. Comparing the detection data of the plurality of ultrasonic sludge concentration sensors 500, and if the detection data are consistent, taking the average value as a second average value; otherwise, re-detecting. Comparing the first average value with the second average value, and if the first average value and the second average value are consistent, taking the average value of the first average value and the second average value as first detection data or second detection data; otherwise, re-detecting.
When the side surface of the tank body 8 is provided with a photoelectric sludge concentration sensor 400 and an ultrasonic sludge concentration sensor 500, two conditions exist; first case: comparing the detection data of the photoelectric sludge concentration sensor 400 with the detection data of the ultrasonic sludge concentration sensor 500, and if the detection data are consistent, uniformly stirring the sewage in the tank body 8, namely taking the average value of the first detection data and the second detection data as the sludge concentration in the tank body 8 (namely, the detection result); otherwise, re-detecting.
Second case: comparing the detection data of the photoelectric sludge concentration sensor 400 with the detection data of the ultrasonic sludge concentration sensor 500, if the detection data are consistent, taking the average value of the detection data and the ultrasonic sludge concentration sensor, comparing the detection data with the average value of the first detection data and the second detection data, and if the detection data are consistent, taking the average value of the detection data and the second detection data as the sludge concentration in the tank body 8 (namely, the detection result); otherwise, re-detecting.
When the side surface of the tank body 8 is provided with a plurality of photoelectric sludge concentration sensors 400 and ultrasonic sludge concentration sensors 500, there are two cases; first case: according to different heights, comparing the detection data of the photoelectric sludge concentration sensor 400 belonging to the same third sludge concentration sensor group 7 (namely the same height) with the detection data of the ultrasonic sludge concentration sensor 500, if the detection data are consistent, taking the average value of the detection data of the same height to obtain the detection data average value of different heights, and comparing, if the detection data are consistent, the sewage in the tank body 8 is considered to be uniformly stirred, namely the average value of the first detection data and the second detection data is taken as the sludge concentration in the tank body 8 (namely the detection result); otherwise, re-detecting.
Second case: according to different heights, comparing the detection data of the photoelectric sludge concentration sensor 400 belonging to one third sludge concentration sensor group 7 (namely the same height) with the detection data of the ultrasonic sludge concentration sensor 500, if the detection data are consistent, taking the average value of the detection data of the same height to obtain the average value of the detection data of different heights, comparing, if the detection data are consistent, taking the average value of all the detection data, comparing with the average value of the first detection data and the average value of the second detection data, and if the detection data are consistent, taking the average value of the first detection data and the average value of the second detection data as the sludge concentration in the tank body 8 (namely the detection result); otherwise, re-detecting.
In some embodiments, as shown in figures 8, 9, 10 and 11, the circuit of the ultrasonic sludge concentration sensor 500 comprises a microcontroller U1, a display screen LCD1, a crystal oscillator X1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor 13, a capacitor C14, a capacitor C15, a capacitor C16, a capacitor C17, a capacitor C18, a capacitor C19, a capacitor C20, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor resistor R14, resistor R15, resistor R16, resistor R17, resistor R18, resistor R19, resistor R20, resistor R21, resistor R22, resistor R23, resistor R24, resistor R25, resistor R26, light emitting diode D1, light emitting diode D2, triode Q1, speaker B1, power socket PWR, inverter U2A, inverter U2B, inverter U2C, inverter U2D, inverter U2E, voltage regulator chip U3, transmitting transducer J1, receiving transducer J2, diode D3, diode D4, triode Q2, op-amp U4, op-amp U5, logarithmic amplifier U6 and op-amp U7.
The pin 19 of the microcontroller U1 is connected with one end of the crystal oscillator X1 and one end of the capacitor C2, the pin 18 of the microcontroller U1 is connected with the other end of the crystal oscillator X1 and one end of the capacitor C1, the other end of the capacitor C1 is connected with the other end of the capacitor C2 and then grounded, the pin 9 of the microcontroller U1 is connected with one end of the capacitor C3 and the grounded resistor R1, the other end of the capacitor C3 is externally connected with the voltage end VCC, the pin 15 of the microcontroller U1 is connected with the cathode of the light emitting diode D1, the anode of the light emitting diode D1 is externally connected with the voltage end VCC, the pin 16 of the microcontroller U1 is connected with one end of the resistor R3, the other end of the resistor R3 is connected with the base of the triode Q1, the collector of the triode Q1 is externally connected with one end of the loudspeaker B1, and the other end of the loudspeaker B1 is grounded.
Pin 21, pin 22, pin 23, pin 39, pin 38, pin 37, pin 36, pin 35, pin 34, pin 33, and pin 32 of microcontroller U1 are connected in a one-to-one correspondence with pin 4, pin 5, pin 6, pin 7, pin 8, pin 9, pin 10, pin 11, pin 12, pin 13, and pin 14 of display LCD1, and pin 3 of display LCD1 is connected with resistor R4, which is grounded.
The pin 14 of the microcontroller U1 is connected with the input end of the inverter U2A, the input end of the inverter U2D and the input end of the inverter U2E, the output end of the inverter U2A is connected with the input end of the inverter U2B and the input end of the inverter U2C, the output end of the inverter U2B is connected with the output end of the inverter U2C, one end of the resistor R6 and one end of the transmitting transducer J1, the other end of the resistor R6 is externally connected with the voltage end VCC, the output end of the inverter U2D is connected with the output end of the inverter U2E, one end of the resistor R5 and the other end of the transmitting transducer J1, and the other end of the resistor R5 is externally connected with the voltage end VCC.
Pin 3 of voltage stabilizing chip U3 is connected with the positive pole of electric capacity C4 and one end of supply socket PWR, and pin 1 of voltage stabilizing chip U3 is connected with the negative pole of electric capacity C4, the other end of supply socket PWR, the negative pole of electric capacity C5, one end of electric capacity C6 and the negative pole of emitting diode D2 and then grounded, pin 4 of voltage stabilizing chip U3 is connected with the positive pole of electric capacity C5, the other end of electric capacity C6 and one end of resistance R7 after being connected as voltage end VCC, the other end of resistance R7 is connected with the positive pole of emitting diode D2.
One end of the receiving transducer J2 is connected with one end of a resistor R8, the other end of the receiving transducer J2 is connected with the cathode of a diode D3 and the anode of a diode D4 and then grounded, the other end of the resistor R8 is connected with one end of a capacitor C7, the other end of the capacitor C7 is connected with one end of the capacitor C8, the anode of the diode D3 and the cathode of the diode D4, the other end of the capacitor C8 is connected with one end of a resistor R9 and the base of a triode Q2, the emitter of the triode Q2 is connected with a grounded resistor R11, the collector of the triode Q2 is connected with the other end of the resistor R9, one end of a resistor R10 and one end of the capacitor C9, the other end of the resistor R10 is externally connected with a voltage end VCC, and the other end of the capacitor C9 is connected with one end of a resistor R12.
The other end of the resistor R12 is connected with one end of the capacitor C10, one end of the resistor R14 and the grounded resistor R13, the other end of the resistor R14 is connected with the same phase end of the operational amplifier U4 and the grounded resistor C11, the opposite phase end of the operational amplifier U4 is connected with one end of the resistor R16 and the grounded resistor R15, the other end of the capacitor C10 is connected with the output end of the operational amplifier U4, one end of the capacitor C12 and the other end of the resistor R16, the positive pole and the negative pole of the operational amplifier U4 are respectively connected with the voltage end VCC+ and the voltage end VCC-, the other end of the capacitor C12 is connected with one end of the capacitor C13 and one end of the resistor R18, the other end of the capacitor C13 is connected with the same phase end of the operational amplifier U5 and the grounded resistor R17, the opposite phase end of the operational amplifier U5 is connected with one end of the resistor R19 and the grounded resistor R20, and the other end of the resistor R18 is connected with the output end of the operational amplifier U5, the other end of the resistor R19, one end of the capacitor C16 and the grounded resistor R21, and the positive pole and the negative pole of the operational amplifier U5 are respectively connected with the voltage end VCC+ and the voltage end VCC.
Pin 1 of logarithmic amplifier U6 is connected with capacitor C14 that is grounded, pin 2 of logarithmic amplifier U6 is grounded, pin 3 of logarithmic amplifier U6 is connected with capacitor C15 that is grounded, pin 4 of logarithmic amplifier U6 is connected with one end of capacitor C17, pin 5 of logarithmic amplifier U6 is connected with pin 6 and then with one end of resistor R22 and one end of capacitor C18, pin 7 of logarithmic amplifier U6 is connected with one end of capacitor C19, pin 8 of logarithmic amplifier U6 is connected with the other end of capacitor C16, the other end of resistor R22 is externally connected with voltage terminal VCC, the other end of capacitor C18 is connected with the other end of capacitor C19, one end of resistor R23 and the negative electrode of operational amplifier U7 are grounded, the other end of resistor C17 is connected with one end of resistor R24, the other end of resistor R24 is connected with the same phase end of operational amplifier U7 and grounded resistor R25, the other end of resistor R23 is connected with the inverting end of operational amplifier U7, one end of resistor R26 and one end of capacitor C20, the other end of the positive voltage terminal VCC 7 of operational amplifier U7 is externally connected with the other end of resistor C20, the other end of the output terminal VCC 26 of operational amplifier U7 is externally connected with the other end of the microcontroller 12.
In this embodiment, the crystal oscillator X1 provides the working frequency, the diode D1 prompts the working state, the speaker B1 is used as an alarm, the display screen LCD1 can display the detection data, the microcontroller U1 can be connected with the processor, or the output end of the operational amplifier U7 is connected with the processor, when the microcontroller U1 controls the transmitting transducer J1 to transmit the ultrasonic wave through the plurality of inverters U2A to U2E, the ultrasonic wave is received by the receiving transducer J2 and converted into the electric signal after passing through the sewage, the electric signal is amplified through the triode Q2, and then is amplified through the logarithmic amplifier U6 after being filtered and amplified by the filter amplifying circuit mainly composed of the operational amplifier U4, the operational amplifier U5 and the corresponding resistor and capacitor, and finally the operational amplifier U7 amplifies and outputs the detection data to the microcontroller U1 or the processor, and the microcontroller U1 displays the detection data on the display screen LCD1. The voltage terminal VCC, the voltage terminal vcc+ and the voltage terminal VCC-may set corresponding voltages according to actual needs, or the voltage terminal VCC connected to the pin 4 of the voltage stabilizing chip U3 may provide voltages.
In some embodiments, as shown in fig. 12, the circuit of the photoelectric sludge concentration sensor 400 includes a resistor R27, a resistor R28, a resistor R29, a resistor R30, a resistor R31, a resistor R32, a light emitter D5, a silicon photocell B1, an amplifier U8 and a triode Q3, wherein one end of the resistor R27 is connected to one end of the resistor R28, one end of the resistor R29 is connected to the collector of the triode Q3 and then externally connected to a voltage terminal VCC, the other end of the resistor R27 is connected to the positive electrode of the light emitter D5, the negative electrode of the light emitter D5 is connected to one end of the silicon photocell B1, one end of the resistor R30 is connected to one end of the resistor R32 and then grounded, the other end of the resistor R28 is connected to the other end of the silicon photocell B1 and the inverting end of the amplifier U8, the other end of the resistor R29 is connected to the other end of the resistor R30 and the same phase end of the amplifier U8, the output end of the amplifier U8 is connected to one end of the resistor R31, the other end of the resistor R31 is connected to the base of the triode Q3, the emitter of the triode Q3 is connected to the other end of the resistor R32 and then connected to the output terminal VOUT.
In this embodiment, the light emitter D5 is generally a light emitting diode that emits light (generally infrared light) with a wavelength that can be absorbed by activated sludge, the light emitter D5 emits infrared light, the infrared light is received by the silicon photocell group B1 and converted into an electrical signal through sewage, and the electrical signal is amplified by the amplifier U8 and the triode Q3 and then outputted from the output terminal VOUT to the processor.
In some embodiments, the processor is coupled to a database. The processor can store the detection data in a database after receiving the detection data so as to carry out comparison in subsequent retrieval; similarly, the various "averages" described above may also be stored in the database.
As shown in fig. 3, another aspect of the embodiments of the present specification discloses a sludge concentration detection method, including the steps of:
s1, stirring sewage in a tank body 8 through a stirring device 1;
s2, respectively pumping out sewage at two opposite sides of the tank body 8 through the first conveying pump 2, the second conveying pump 3, the first return pipe 21, the second return pipe 31, the first sludge concentration sensor group 5 and the second sludge concentration sensor group 6, and detecting the sludge concentration to obtain the sludge concentration of the sewage at two opposite sides of the tank body 8;
s3, comparing the sludge concentrations of the sewage at two opposite sides of the tank body 8 through a processor, and taking the average value of the two sewage concentrations as the sludge concentration if the sludge concentrations of the sewage at two sides are consistent; otherwise, repeating the steps S1-S2 until the sludge concentration of the sewage at the two sides is consistent, and taking the average value of the two as the sludge concentration;
s4, taking the sludge concentration obtained in the step S3 as a first sludge concentration, stopping stirring, and after the sewage in the tank body 8 is restored to a relatively static state before stirring, executing the steps S1-S3 again, and taking the sludge concentration obtained in the step S3 as a second sludge concentration;
S5, comparing the first sludge concentration with the second sludge concentration through a processor, and taking the average value of the first sludge concentration and the second sludge concentration as a sludge concentration detection result if the first sludge concentration is consistent with the second sludge concentration; otherwise, repeating S1-S4 until the first sludge concentration and the second sludge concentration are consistent, and taking the average value of the first sludge concentration and the second sludge concentration as a sludge concentration detection result.
In this embodiment, the sludge concentration detection system according to any one of the above embodiments is used to perform sludge concentration detection, that is, each embodiment of the sludge concentration detection method may be implemented by the sludge concentration detection system.
Comparing the sludge concentration of the sewage at two opposite sides of the tank body 8 twice successively, if the two average values are consistent, the sewage in the tank body 8 can be considered to be uniformly stirred, and the average value (the average value of the first sludge concentration and the second sludge concentration) of the two average values is used as the sludge concentration in the tank body 8, namely the reliability and the accuracy of the detection result are higher.
In some embodiments, the sludge concentration detection method further comprises the steps of:
s6, respectively arranging third sludge concentration sensor groups 7 at different heights of the tank body 8 so as to directly detect the sludge concentrations of the sewage at different heights in the tank body 8;
S7, comparing the sludge concentrations of the sewage with different heights through a processor, and taking the average value of the first sludge concentration and the second sludge concentration obtained in the S5 as a sludge concentration detection result if the sludge concentrations of the sewage with different heights are consistent; otherwise, repeating S1-S6 until the sludge concentration of the sewage at different heights is consistent.
In this embodiment, by comparing the sludge concentrations of the sewage with different heights, if the sludge concentrations are consistent, the sewage in the tank body 8 is considered to be uniformly stirred, that is, the average value of the first sludge concentration and the second sludge concentration is used as the sludge concentration in the tank body 8, that is, the reliability and the accuracy of the detection result are higher.
In some embodiments, in S7, if the sludge concentrations of the sewage at different heights are consistent, taking a mean value of the sludge concentrations of the sewage at different heights, comparing the mean value with the mean value of the first sludge concentration and the second sludge concentration obtained in S5, and if the mean value of the sludge concentrations of the sewage at different heights is consistent with the mean value of the first sludge concentration and the second sludge concentration, taking the mean value of the two as a sludge concentration detection result; otherwise, repeating S1-S6 until the average value of the sludge concentration of the sewage with different heights is consistent with the average value of the first sludge concentration and the second sludge concentration.
In this embodiment, by comparing the sludge concentrations of the sewage with different heights, if the sludge concentrations are consistent, the average value of the sludge concentrations of the sewage with different heights is compared with the average value of the first sludge concentration and the second sludge concentration, if the sludge concentrations are consistent, the sewage in the tank body 8 is considered to be uniformly stirred, and the average value of the sewage and the first sludge concentration is used as the sludge concentration in the tank body 8, namely, the reliability and the accuracy of the detection result are higher.
In some embodiments, in S2, the sewage at the middle position between the two opposite sides of the tank 8 is pumped out, and mixed with the sewage at the two opposite sides of the tank 8, and then the sludge concentration is detected.
In the embodiment, after the sewage in the middle position is mixed with the sewage on one side, the sludge concentration is detected to obtain first detection data; mixing the sewage at the middle position with the sewage at the other side, and then detecting the concentration of the sludge to obtain second detection data; if the first detection data and the second detection data are consistent, the sewage in the tank body 8 is considered to be uniformly stirred, and the reliability and accuracy of the comparison result and the detection result are further improved; that is, the reliability and accuracy can be further improved after the present embodiment is applied in combination with the above embodiments.
In some embodiments, the sludge concentration detection system further comprises a memory coupled to the processor and storing a computer program executable on the processor; when the processor executes the computer program, the processor controls the stirring device 1, the first transfer pump 2, the second transfer pump 3, the third transfer pump 4, the first sludge concentration sensor group 5, the second sludge concentration sensor group 6 and the third sludge concentration sensor group 7 to operate so as to realize the sludge concentration detection method described above.
In some embodiments, the processor is further connected with a display terminal, and the processor displays the various detection data (sludge concentration), the average value, the comparison result and the sludge concentration detection result through the display terminal so as to facilitate the observation of staff.
In summary, a plurality of specific embodiments of the present invention are disclosed, and under the condition of no paradox, each embodiment may be freely combined to form a new embodiment, that is, embodiments belonging to alternative schemes may be freely replaced, but cannot be mutually combined; embodiments not belonging to the alternatives can be combined with each other, and these new embodiments also belong to the essential content of the invention.
While the above examples describe various embodiments of the present invention, those skilled in the art will appreciate that various changes and modifications can be made to these embodiments without departing from the spirit and scope of the present invention, and that such changes and modifications fall within the scope of the present invention.
Claims (5)
1. A sludge concentration detection system, comprising:
the stirring device is used for stirring the sewage in the tank body;
the first conveying pump and the second conveying pump are respectively arranged on two opposite sides of the top of the tank body and are respectively communicated with the inside of the tank body on one side of each conveying pump through pipelines;
one end of the first return pipe is connected with the first delivery pump, and the other end of the first return pipe is communicated with the interior of the tank body;
one end of the second return pipe is connected with the second delivery pump, and the other end of the second return pipe is communicated with the interior of the tank body;
the first sludge concentration sensor group is arranged on the first return pipe so as to detect the sludge concentration of the sewage in the first return pipe;
the second sludge concentration sensor group is arranged on the second return pipe so as to detect the sludge concentration of the sewage in the second return pipe;
the processor is respectively connected with the first sludge concentration sensor group and the second sludge concentration sensor group to receive detection data of the first sludge concentration sensor group and the second sludge concentration sensor group, compare the detection data, and take the average value of the detection data as a sludge concentration detection result if the detection data are consistent;
The top of the tank body is provided with a third delivery pump, the third delivery pump is positioned between the first delivery pump and the second delivery pump, the input end of the third delivery pump is communicated with the inner part of the tank body below the third delivery pump through a pipeline, the output end of the third delivery pump is respectively communicated with the first return pipe and the second return pipe through pipelines, and two communication points are respectively positioned between the first delivery pump and the first sludge concentration sensor group and between the second delivery pump and the second sludge concentration sensor group;
the stirring device comprises:
the first stirring mechanism is arranged between the first conveying pump and the third conveying pump;
the second stirring mechanism is arranged between the second conveying pump and the third conveying pump;
a third sludge concentration sensor group is arranged on the side surface of the tank body, and a detection transmitting end and a detection receiving end of the third sludge concentration sensor group are respectively arranged on two opposite sides of the tank body so as to detect the sludge concentration of sewage between the two sides;
the third sludge concentration sensor groups are provided with a plurality of groups and are respectively distributed at different heights of the tank body and are used for detecting the sludge concentrations of sewage at different heights of the tank body;
Comparing the sludge concentrations of the sewage with different heights, if the sludge concentrations are consistent, uniformly stirring the sewage in the tank body, and taking the average value of the detection data of the first sludge concentration sensor group and the second sludge concentration sensor group as a sludge concentration detection result;
or comparing the sludge concentrations of the sewage with different heights, if the sludge concentrations are consistent, acquiring the average value of the sludge concentrations of the sewage with different heights, comparing the average value with the detection data of the first sludge concentration sensor group and the second sludge concentration sensor group, and if the sludge concentrations are consistent, taking the average value of the detection data of the first sludge concentration sensor group and the second sludge concentration sensor group as a sludge concentration detection result; if the first sludge concentration sensor group, the second sludge concentration sensor group and the third sludge concentration sensor group are inconsistent, the first sludge concentration sensor group, the second sludge concentration sensor group and the third sludge concentration sensor group are indicated to be redetected;
the first sludge concentration sensor group and/or the second sludge concentration sensor group and/or the third sludge concentration sensor group comprise at least one photoelectric sludge concentration sensor and at least one ultrasonic sludge concentration sensor;
the circuit of the photoelectric sludge concentration sensor comprises a resistor R27, a resistor R28, a resistor R29, a resistor R30, a resistor R31, a resistor R32, a light emitter D5, a silicon photocell group B1, an amplifier U8 and a triode Q3, wherein one end of the resistor R27 is connected with one end of the resistor R28, one end of the resistor R29 and a collector of the triode Q3 to be externally connected with a voltage end VCC, the other end of the resistor R27 is connected with an anode of the light emitter D5, a cathode of the light emitter D5 is connected with one end of the silicon photocell group B1, one end of the resistor R30 and one end of the resistor R32 to be grounded, the other end of the resistor R28 is connected with the other end of the silicon photocell group B1 and an inverting end of the amplifier U8, the other end of the resistor R29 is connected with the other end of the resistor R30 and the same-phase end of the amplifier U8, the output end of the amplifier U8 is connected with one end of the resistor R31, the other end of the resistor R31 is connected with a base of the triode Q3, an emitter of the triode Q3 is connected with the other end of the resistor R32 to be used as an output end, and the output end is connected with a processor;
The circuit of the ultrasonic sludge concentration sensor comprises a microcontroller U1, a display screen LCD1, a crystal oscillator X1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor 13, a capacitor C14, a capacitor C15, a capacitor C16, a capacitor C17, a capacitor C18, a capacitor C19, a capacitor C20, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor C20, a resistor R1, a resistor R2, a resistor R11 resistor R14, resistor R15, resistor R16, resistor R17, resistor R18, resistor R19, resistor R20, resistor R21, resistor R22, resistor R23, resistor R24, resistor R25, resistor R26, light emitting diode D1, light emitting diode D2, triode Q1, speaker B1, power socket PWR, inverter U2A, inverter U2B, inverter U2C, inverter U2D, inverter U2E, voltage regulator chip U3, transmitting transducer J1, receiving transducer J2, diode D3, diode D4, triode Q2, op-amp U4, op-amp U5, logarithmic amplifier U6 and op-amp U7;
a pin 19 of the microcontroller U1 is connected with one end of the crystal oscillator X1 and one end of the capacitor C2, a pin 18 of the microcontroller U1 is connected with the other end of the crystal oscillator X1 and one end of the capacitor C1, the other end of the capacitor C1 is connected with the other end of the capacitor C2 and then grounded, a pin 9 of the microcontroller U1 is connected with one end of the capacitor C3 and a grounded resistor R1, the other end of the capacitor C3 is externally connected with a voltage end VCC, a pin 15 of the microcontroller U1 is connected with the negative electrode of the light emitting diode D1, the positive electrode of the light emitting diode D1 is externally connected with a voltage end VCC, a pin 16 of the microcontroller U1 is connected with one end of the resistor R3, the other end of the resistor R3 is connected with the base electrode of the triode Q1, the collector electrode of the triode Q1 is externally connected with one end of the loudspeaker B1, and the other end of the loudspeaker B1 is grounded;
Pin 21, pin 22, pin 23, pin 39, pin 38, pin 37, pin 36, pin 35, pin 34, pin 33 and pin 32 of microcontroller U1 are connected in one-to-one correspondence with pin 4, pin 5, pin 6, pin 7, pin 8, pin 9, pin 10, pin 11, pin 12, pin 13 and pin 14 of display screen LCD1, and pin 3 of display screen LCD1 is connected with resistor R4 which is grounded;
the pin 14 of the microcontroller U1 is connected with the input end of the inverter U2A, the input end of the inverter U2D and the input end of the inverter U2E, the output end of the inverter U2A is connected with the input end of the inverter U2B and the input end of the inverter U2C, the output end of the inverter U2B is connected with the output end of the inverter U2C, one end of the resistor R6 and one end of the transmitting transducer J1, the other end of the resistor R6 is externally connected with the voltage end VCC, the output end of the inverter U2D is connected with the output end of the inverter U2E, one end of the resistor R5 and the other end of the transmitting transducer J1, and the other end of the resistor R5 is externally connected with the voltage end VCC;
pin 3 of voltage stabilizing chip U3 is connected with the positive electrode of capacitor C4 and one end of power socket PWR, pin 1 of voltage stabilizing chip U3 is connected with the negative electrode of capacitor C4, the other end of power socket PWR, the negative electrode of capacitor C5, one end of capacitor C6 and the negative electrode of light emitting diode D2, and then grounded, pin 4 of voltage stabilizing chip U3 is connected with the positive electrode of capacitor C5, the other end of capacitor C6 and one end of resistor R7, and then is used as voltage end VCC, and the other end of resistor R7 is connected with the positive electrode of light emitting diode D2;
One end of the receiving transducer J2 is connected with one end of a resistor R8, the other end of the receiving transducer J2 is connected with the cathode of a diode D3 and the anode of a diode D4 and then grounded, the other end of the resistor R8 is connected with one end of a capacitor C7, the other end of the capacitor C7 is connected with one end of the capacitor C8, the anode of the diode D3 and the cathode of the diode D4, the other end of the capacitor C8 is connected with one end of a resistor R9 and the base of a triode Q2, the emitter of the triode Q2 is connected with a grounded resistor R11, the collector of the triode Q2 is connected with the other end of the resistor R9, one end of a resistor R10 and one end of the capacitor C9, the other end of the resistor R10 is externally connected with a voltage end VCC, and the other end of the capacitor C9 is connected with one end of a resistor R12;
the other end of the resistor R12 is connected with one end of the capacitor C10, one end of the resistor R14 and the grounded resistor R13, the other end of the resistor R14 is connected with the same phase end of the operational amplifier U4 and the grounded resistor C11, the opposite phase end of the operational amplifier U4 is connected with one end of the resistor R16 and the grounded resistor R15, the other end of the resistor C10 is connected with the output end of the operational amplifier U4, one end of the capacitor C12 and the other end of the resistor R16, the positive pole and the negative pole of the operational amplifier U4 are respectively connected with a voltage end VCC+ and a voltage end VCC-, the other end of the capacitor C12 is connected with one end of the capacitor C13 and one end of the resistor R18, the other end of the capacitor C13 is connected with the same phase end of the operational amplifier U5 and the grounded resistor R17, the opposite phase end of the operational amplifier U5 is connected with one end of the resistor R19 and the grounded resistor R20, and the other end of the resistor R18 is connected with the output end of the operational amplifier U5, the other end of the resistor R19, one end of the capacitor C16 and the grounded resistor R21, and the positive pole and the negative pole of the operational amplifier U5 are respectively connected with the voltage end VCC+ and the voltage end VCC;
Pin 1 of logarithmic amplifier U6 is connected with capacitor C14 that is grounded, pin 2 of logarithmic amplifier U6 is grounded, pin 3 of logarithmic amplifier U6 is connected with capacitor C15 that is grounded, pin 4 of logarithmic amplifier U6 is connected with one end of capacitor C17, pin 5 of logarithmic amplifier U6 is connected with pin 6 and then with one end of resistor R22 and one end of capacitor C18, pin 7 of logarithmic amplifier U6 is connected with one end of capacitor C19, pin 8 of logarithmic amplifier U6 is connected with the other end of capacitor C16, the other end of resistor R22 is externally connected with voltage terminal VCC, the other end of capacitor C18 is connected with the other end of capacitor C19, one end of resistor R23 and the negative electrode of operational amplifier U7 are grounded, the other end of resistor C17 is connected with one end of resistor R24, the other end of resistor R24 is connected with the same phase end of operational amplifier U7 and grounded resistor R25, the other end of resistor R23 is connected with the inverting end of operational amplifier U7, one end of resistor R26 and one end of capacitor C20, the other end of the positive voltage terminal VCC 7 of operational amplifier U7 is externally connected with the other end of resistor C20, the other end of the output terminal VCC 26 of operational amplifier U7 is externally connected with the other end of the microcontroller 12.
2. A method for detecting a sludge concentration, characterized in that the sludge concentration detection system according to claim 1 is used for detecting a sludge concentration;
The sludge concentration detection method comprises the following steps:
s1, stirring sewage in a tank body through a stirring device;
s2, respectively pumping out sewage at two opposite sides in the tank body through a first conveying pump, a second conveying pump, a first return pipe, a second return pipe, a first sludge concentration sensor group and a second sludge concentration sensor group, and detecting the sludge concentration to obtain the sludge concentration of the sewage at two opposite sides in the tank body;
s3, comparing the sludge concentrations of the sewage at the two opposite sides in the tank body through the processor, and taking the average value of the sewage at the two sides as the sludge concentration if the sludge concentrations of the sewage at the two sides are consistent; otherwise, repeating the steps S1-S2 until the sludge concentration of the sewage at the two sides is consistent, and taking the average value of the two as the sludge concentration;
s4, taking the sludge concentration obtained in the step S3 as a first sludge concentration, stopping stirring, and after the sewage in the tank body is restored to a relatively static state before stirring, executing the step S1 to the step S3 again, and taking the sludge concentration obtained in the step S3 as a second sludge concentration;
s5, comparing the first sludge concentration with the second sludge concentration through a processor, and taking the average value of the first sludge concentration and the second sludge concentration as a sludge concentration detection result if the first sludge concentration is consistent with the second sludge concentration; otherwise, repeating S1-S4 until the first sludge concentration and the second sludge concentration are consistent, and taking the average value of the first sludge concentration and the second sludge concentration as a sludge concentration detection result.
3. The method for detecting the concentration of sludge according to claim 2, further comprising the steps of:
s6, respectively arranging third sludge concentration sensor groups at different heights of the tank body so as to directly detect the sludge concentrations of the sewage at different heights in the tank body;
s7, comparing the sludge concentrations of the sewage with different heights through a processor, and taking the average value of the first sludge concentration and the second sludge concentration obtained in the S5 as a sludge concentration detection result if the sludge concentrations of the sewage with different heights are consistent; otherwise, repeating S1-S6 until the sludge concentration of the sewage at different heights is consistent.
4. The method for detecting sludge concentration according to claim 3, wherein in S7, if the sludge concentrations of the sewage at different heights are identical, the average value of the sludge concentrations of the sewage at different heights is taken, and compared with the average value of the first sludge concentration and the second sludge concentration obtained in S5, and if the average value of the sludge concentrations of the sewage at different heights is identical to the average value of the first sludge concentration and the second sludge concentration, the average value of the two is taken as a sludge concentration detection result; otherwise, repeating S1-S6 until the average value of the sludge concentration of the sewage with different heights is consistent with the average value of the first sludge concentration and the second sludge concentration.
5. The method according to claim 3 or 4, wherein in S2, the sewage at the intermediate position between the opposite sides of the tank is pumped out and mixed with the sewage at the opposite sides of the tank, respectively, and then the sludge concentration is detected.
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