CN105629243A

CN105629243A - Online monitoring sonar device for solid waste in sewage pipe duct

Info

Publication number: CN105629243A
Application number: CN201410611280.XA
Authority: CN
Inventors: 童峰; 郭子成; 林建光
Original assignee: Polytron Technologies Xiamen Co Ltd
Current assignee: Polytron Technologies Xiamen Co Ltd
Priority date: 2014-11-04
Filing date: 2014-11-04
Publication date: 2016-06-01
Also published as: WO2016070488A1

Abstract

The invention discloses an online monitoring sonar device for solid waste in a sewage pipe duct. The device comprises an emission circuit, an emission transducer, a receiving transducer, a sound signal receiving circuit, an analog-to-digital conversion module and a main control module. By means of sound signal emitting and receiving, signal envelope extraction and non-uniform characteristic extraction, the existence and size information of the solid waste in the sewage is obtained and a result is output. According to the invention, the online sonar monitoring on the solid waste in the sewage pipe duct can be realized effectively; by means of simple and convenient sound signal continuous wave non-uniformity detection, wide directivity is utilized to extract the existence and size information of the solid waste in the pipe duct which is narrow, enclosed and variable in water level, and the various defects of conventional visible light, electromagnetic wave and ultrasonic wave detection methods under the same usage environment are avoided; in addition, the system is convenient to install, use and maintain, is low in cost and can be conveniently combined with a sewage crushing rack to form an automatic processing and crushing processing system for the solid waste in the sewage.

Description

The on-line monitoring sonar equipment of solid refuse in a kind of sewage pipe duct

Technical field

The invention belongs to sewage conduct monitoring technical field, specifically the on-line monitoring sonar equipment of solid refuse in a kind of sewage pipe duct.

Background technology

Current along with all kinds of extreme weathers are to social influence's aggravation, it is ensured that the unobstructed importance of sewage pipe duct draining. Particularly in municipal sewage, the solid refuse such as all kinds of cardboards, billboard, sheet material, trees has had a strong impact on pumping drainage efficiency, pumping station layout pulverize grid to sewage pipe duct in solid refuse carry out broken in time playing an important role to ensureing that draining is unimpeded. But lack at present and carry out the special purpose device of on-line monitoring to sewage pipe duct is fixed rubbish, the mode such as timing working, Artificial Control that often relies in pumping plant is to start pulverizing grid, and efficiency is low and cannot adapt to the sewage drainage obstruction that under emergency situations, solid refuse causes. Application number be 201320053443.8 Chinese patent disclose the utility model patent of " a kind of town sewage treatment system " by name, the Chinese patent of application number 201410136363.8 disclose by name " a kind of multi-functional tracking sampling linked system " and patent of invention, although these patent documentations provide the technical scheme of some municipal sewage treatments and monitoring, but do not propose feasible technical scheme for problem above.

Research and develop a kind of on-line monitoring sonar equipment for carrying out the on-line monitoring of solid refuse in sewage pipe duct, control to pulverize grid by the solid refuse of large-size in on-line water flushing sewage and start comminution process, improve pumping plant and pulverize the ability that grid is quick, efficiently process all kinds of sewage obstructing problems, become objective necessity. But considering that in sewage pipe duct, sewage is mixed with liquid, the immobilized particles such as substantial amounts of silt, impurity, dirt, acoustic impedance is uneven, have a strong impact on traditional optical, electrical magnetic wave, ultrasonic signal propagation in sewage; Simultaneously, under different hull-bornes, the water level of sewage pipe duct presents bigger change (dry season water level is extremely low, flooding period overflows), cannot remain mounted on the transmitting of all kinds of detectable signals in pipe duct, receiving transducer is in sewage level above and below all the time, due to the transmission characteristic difference of air Yu liquid, the reflection that between transmitting-receiving probe, change liquid level causes will have a strong impact on normally receiving of the detectable signals such as optical, electrical magnetic wave, ultrasound wave; On the other hand, owing to needing in detection sewage the approximate dimensions of solid refuse to assess whether to start disintegrating apparatus, forming sharp-pointed directional wave beam in the sewage pipe duct that the reflection of narrow, interface is serious, to carry out the acoustical signal detection of certain space resolution be also extremely difficult. Therefore, it is impossible to directly utilize traditional visible ray, electromagnetic wave or ultrasonic signal detection method or device carries out the detection of solid refuse in sewage pipe duct.

Summary of the invention

For solving problem above, the present invention provide a kind of simple and convenient, can the on-line monitoring sonar equipment of solid refuse in on-line monitoring sewage pipe duct.

The above-mentioned purpose of the present invention is realized by following technical proposal:

The on-line monitoring sonar equipment of solid refuse in a kind of sewage pipe duct, receives circuit, analog-to-digital conversion module and main control module including radiating circuit, transmitting transducer, reception transducer, acoustical signal; Described radiating circuit produces launch signal and be connected to transmitting transducer; Transmitting transducer is arranged on the bottom of sewage pipe duct, launches acoustical signal; Receive transducer and be arranged on the top of sewage pipe duct, receive the acoustical signal that transmitting transducer sends; Receive circuit and connect reception transducer, by the premenstrual storing of acoustical signal received received by transducer, big, gain control, bandpass filtering and envelope detection are sent to analog-to-digital conversion module after processing, and the signal after being received processing of circuit is converted to digital signal by analog-to-digital conversion module; Main control module connects analog-to-digital conversion module by data wire, and digital signal produced by analog-to-digital conversion module is carried out feature extraction, it is thus achieved that the dimension information that has that it's too late of solid refuse in sewage, exports result.

Water proof type T/R40-16 transducer selected by described transmitting transducer and reception transducer, and its mid frequency is 40kHz, 60 degree of directivity angle, waterproof enclosure.

The interface circuit of gain control circuit that pre-amplification circuit that described reception circuit is made up of front chip NJM2100, AD603 chip form and the 40kHz bandwidth-limited circuit that MAX274 chip forms, the envelope detection circuit that NE5532 chip forms and S3C2440 microprocessor forms.

Described main control module includes ARM9S3C2440 microprocessor, and radiating circuit is controlled 4046 oscillating circuit output 40kHz continuous signals by main control module ARM9S3C2440 microprocessor.

Adopt after technique scheme, the invention has the beneficial effects as follows: 1, can be effectively realized and carry out sonar on-line monitoring to sewage pipe duct is fixed rubbish; 2, by the detection of acoustical signal continuous wave heterogeneity simply and easily utilize wide directivity and have symmetric characteristic realize to narrow, close, the extraction of the existence of solid refuse and dimension information in the pipe duct of SEA LEVEL VARIATION, it is to avoid traditional visible ray, electromagnetic wave, ultrasonic detection method many disadvantages under this use environment; 3, system install, use, easy to maintenance, cost is low, it is simple to pulverizes grid combination with sewage and constitutes the monitoring automatically of solid refuse, pulverization process system in sewage.

Accompanying drawing explanation

Fig. 1 is the systematic schematic diagram of the present invention;

Fig. 2 is acoustical signal radiating circuit and is connected circuit diagram with main control module;

Fig. 3 is that acoustical signal reception circuit is connected circuit diagram with main control module;

Fig. 4 be in sewage pipe duct solid refuse through detection system and the acoustical signal continuous signal envelope waveform schematic diagram received.

Primary symbols explanation

1, radiating circuit

2, transmitting transducer

3, transducer is received

4, acoustical signal receives circuit

5, analog-to-digital conversion module

6, main control module

7, sewage pipe duct.

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, the invention will be further described.

Embodiment: the on-line monitoring sonar equipment of solid refuse in a kind of sewage pipe duct, as it is shown in figure 1, include radiating circuit 1, transmitting transducer 2, reception transducer 3, acoustical signal reception circuit 4, analog-to-digital conversion module 5 and main control module 6. Radiating circuit 1 produces launch signal and be connected to transmitting transducer 2. Transmitting transducer 2 is arranged on the bottom of sewage pipe duct 7, launches acoustical signal. Receive transducer 3 and be arranged on the top of sewage pipe duct 7, receive the acoustical signal that transmitting transducer 2 sends. Receive circuit 4 and connect reception transducer 3, by the premenstrual storing of acoustical signal received received by transducer 3, big, gain control, bandpass filtering and envelope detection are sent to analog-to-digital conversion module 5 after processing, and analog-to-digital conversion module 5 is converted to digital signal by being received the signal after circuit 4 processes. Main control module 6 connects analog-to-digital conversion module 5 by data wire, and digital signal produced by analog-to-digital conversion module 5 is carried out feature extraction, it is thus achieved that the dimension information that has that it's too late of solid refuse in sewage, exports result. Water proof type T/R40-16 transducer selected by transmitting transducer 2 and reception transducer 3, and its mid frequency is 40kHz, 60 degree of directivity angle, waterproof enclosure. Receive the pre-amplification circuit that is made up of front chip NJM2100 of circuit 4, gain control circuit that AD603 chip forms and the 40kHz bandwidth-limited circuit that MAX274 chip forms, envelope detection circuit that NE5532 chip forms and S3C2440 microprocessor interface circuit form (as shown in Figure 3). Main control module 6 includes ARM9S3C2440 microprocessor, and radiating circuit is controlled 4046 oscillating circuit output 40kHz continuous signals by main control module ARM9S3C2440 microprocessor.

It is arranged on the continuous sine wave acoustical signal of transmitting transducer 2 transmission center frequency values 40kHz bottom sewage pipe duct 7, to utilize the nonuniformity of continuous wave signal to realize the dimension information monitoring of solid refuse. The reception acoustic signal sensor 3 being arranged on pipe duct top receives acoustical signal. 4046 oscillating circuit output 40kHz continuous signals are controlled by main control module ARM9S3C2440 microprocessor. After main control module 6 starts acoustical signal transmitting, the Voltage-Controlled oscillation circuit being made up of 4046 chips shown in Fig. 2 is enabled the continuous oscillation signal of 4046 chip output center frequency 40kHz by the GPB10 port output low level of S3C2440, promotes transmitting transducer TS to launch 40kHz continuous signal. The acoustical signal that acoustical signal reception circuit 4 receives inputs 8 passage modulus conversion chip MAX118 after pre-amplification circuit amplification, gain control, bandpass filtering, envelope detection, S3C2440 microprocessor passes through I/O port GPB2,3,4 input channel end A6, A7 controlling MAX118, carried out the analog digital conversion of sample frequency 20ksps by the reading of intervalometer output pin TOUT0, TOUT1 control MAX118/write port WR, RD, carry out the transmission to main control module S3C2440 microprocessor of the 8bit analog-digital conversion result by data wire DATA0 to DATA7 envelope to received signal. Receive the heterogeneity detection process of acoustical signal with Digital Signal Processing, the ARM9S3C2440 microprocessor processes being adopted as main control module realizes, sound reception signal envelope after analog digital conversion carries out the extraction of heterogeneity characteristic parameter in S3C2440 microprocessor, it is judged that, output of reporting to the police.

The continuous sine wave signal envelope received is carried out heterogeneity feature detection thus obtaining the process of solid refuse information in sewage, it is specifically described below in conjunction with Fig. 4: transmitting transducer 2 is installed on sewage pipe duct 7 bottom emission 40kHz continuous sine wave signal (as shown in Figure 4 (c)), and reception transducer 3 is installed on bottom sewage pipe duct 7 and signal is received and envelope extraction. owing to launching, receive the transmitting that transducer has, receive wider (the water proof type T/R40 transmitting that the present embodiment adopts of directional wave beam, the width receiving transducer directivity field angle is 60 degree, in Fig. 4 (b) shown in dotted line) and symmetrical around center sensor line, the acoustical signal transmission characteristic that the signal envelope amplitude that reception transducer 3 receives actually reflects in directional wave beam width regions, when in the sewage that pipe duct flows through containing solid refuse, along with solid refuse is by transmitting transducer 2, receive the axis (as Suo Shi Fig. 4 (b) chain lines) of transducer 3, transmitting transducer 2 is launched and is received the signal directional wave beam that receives of transducer 3 and experienced by and be not blocked, it is at least partially obscured, all block, it is at least partially obscured, it is not blocked and so a series of there is time symmetric impact, it is reflected on the reception signal envelope of extraction and then presents the heterogeneous characteristics of similar inverted trapezoidal as shown in Fig. 4 (a). then, envelope enters after main control module through Analog-digital Converter, only need to adopt digital signal processing algorithm that the depression degree k and recess width w receiving transducer 3 and receiving inverted trapezoidal heterogeneity part in signal envelope is carried out parameter detecting, can obtain solid refuse in sewage with or without and the information of size. depression degree k and recess width w is respectively defined as (as Suo Shi Fig. 4 (a)):

W=signal amplitude is lower than the finish time t2-signal amplitude initial time t1 lower than setting thresholding v setting thresholding v;

Signal amplitude minima between k=t1 to the t2 moment;

Threshold value v is set according to the on-the-spot situation such as sewage, pumping plant disintegrating apparatus.

The Digital Signal Processing detection algorithm of above-mentioned each parameter all can adopt algorithm generally in the art. Detection and Extraction through envelope heterogeneity feature to received signal, depression degree k reflects the acoustic propagation that in sewage, the solid heterogeneity such as solid refuse causes and is blocked phenomenon, recess width w then reflects the dimension information of solid refuse, and the w parameter of its correspondence of solid refuse that size is more big is more big. due to the present embodiment employing is that continuous wave is launched, continuous wave detects and feature extraction, utilizes envelope heterogeneity feature that the detection of solid refuse size in sewage has higher precision, can realize real-time, on-line monitoring simultaneously. aforementioned due to transmitting transducer 2 and receive the voltage that sewage level between transducer 3 occurs that the receptions signal amplitude change that change causes is exported according to main control module by gain control chip AD603 in reception circuit and automatically control, the process of implementing is: main control processor receives and judges current averaged signal amplitude, and export the gain (as shown in Figure 3) of the suitable control Control of Voltage AD603 chip of (DAC) port AINT2 pin output from the digital simulation of the present embodiment main control module according to current demand signal average amplitude, thus adjustable receives the amplitude of signal in suitable scope, not by the impact of sewage level change in pipe duct (under sewage flooded condition, launch, system also can normal operation when being all immersed in sewage to receive transducer).

After main control module S3C2440 carries out nonuniformity parameter depression degree k and the recess width w detection of envelope waveform, alarm threshold can be set, once nonuniformity parameter exceedes alarm threshold, get final product output alarm signal, the relevant disintegrating apparatus starting blowdown pumping plant carries out the timely process of solid refuse, thus avoiding blocking the serious consequence caused. Due to adopt continuous wave launch and reception process, it may be achieved in sewage solid refuse online, process in real time.

The key step of the sonar on-line monitoring realizing solid refuse in sewage pipe duct can be summarized as: acoustical signal transmitting, reception, signal envelope extraction, heterogeneous characteristics are extracted, judged to export step. Concrete thought is: utilize the transmitting transducer 2 being arranged on bottom sewage pipe duct 7 to launch continuous sine wave, the transducer 3 that receives being arranged on sewage pipe duct top obtains the acoustical signal transmitted from bottom to top, signal receiving circuit utilize gain control keep amplitude basically identical, signal is amplified, filters, after envelope extraction processes, the amplitude of variation of signal envelope and symmetry variation characteristic parameter are extracted by main control module, carry out solid refuse information in sewage according to the heterogeneity characteristic parameter extracted to judge, it is achieved on-line monitoring.

Acoustical signal transmitting receiving step is utilized respectively bottom sewage pipe duct 7, tip position is fixing transmitting transducer 2, reception transducer 3 are launched acoustical signal and receive; Signal envelope extraction step is by receiving acoustical signal and carrying out preposition amplification, gain control, bandpass filtering, envelope extraction; Heterogeneous characteristics extraction step then carries out characterizing the feature that solid refuse passes through in sewage in envelope after signal envelope is carried out analog digital conversion and extracts, and obtains the size information that has that it's too late of solid refuse; Judge that output step judges according to the heterogeneous characteristics extracted, and export judged result for subsequent treatment. The complex situations of, level change narrow and small for sewage impurity in sewage pipe duct 7, space-closed, adopt all kinds of conventional methods that pulse signal form is detected and device to be difficult to solid refuse is existed and the detection of size. The azimuthal symmetry that the directional wave beam utilizing general transmitting, reception transducer wider has carries out the size detection of solid refuse, adopting continuous wave heterogeneous characteristics detection means simply and easily to obtain the dimension information that has that it's too late of solid refuse in sewage, using array technique complicated, high cost to be formed sharply to detect wave beam thus avoiding; Meanwhile, adopt gain control to avoid transmitting in receiving circuit 4, receive the impact that detection is caused by the reception signal amplitude change that between transducer, the sewage level of change causes.

What in sewage pipe duct disclosed by the invention, solid refuse on-line monitoring sonar equipment was maximum be characterized in that by the detection of acoustical signal continuous wave heterogeneity simply and easily utilize wide directional wave beam realize to narrow, close, the extraction of the existence of solid refuse and dimension information in the sewage pipe duct of SEA LEVEL VARIATION, it is to avoid the detection method many disadvantages under this use environment such as traditional visible ray, electromagnetic wave, ultrasound wave. Meanwhile, system installs, uses, easy to maintenance, and cost is low, it is simple to pulverizes grid combination with sewage and constitutes the monitoring automatically of solid refuse, pulverization process system in sewage.

The foregoing is only the preferred embodiments of the present invention, it is not limited to invention, although the present invention being described in detail with reference to previous embodiment, for a person skilled in the art, technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature carries out equivalent replacement. All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.

Claims

1. the on-line monitoring sonar equipment of solid refuse in a sewage pipe duct, it is characterised in that: include radiating circuit, transmitting transducer, reception transducer, acoustical signal reception circuit, analog-to-digital conversion module and main control module; Described radiating circuit produces launch signal and be connected to transmitting transducer; Transmitting transducer is arranged on the bottom of sewage pipe duct, launches acoustical signal; Receive transducer and be arranged on the top of sewage pipe duct, receive the signal that transmitting transducer sends; Receive circuit and connect reception transducer, by the premenstrual storing of acoustical signal received received by transducer, big, gain control, bandpass filtering and envelope detection are sent to analog-to-digital conversion module after processing, and the signal after being received processing of circuit is converted to digital signal by analog-to-digital conversion module; Main control module connects analog-to-digital conversion module by data wire, and digital signal produced by analog-to-digital conversion module is carried out feature extraction, it is thus achieved that the dimension information that has that it's too late of solid refuse in sewage, exports result.

2. the on-line monitoring sonar equipment of solid refuse in sewage pipe duct according to claim 1, it is characterized in that: water proof type T/R40-16 transducer selected by described transmitting transducer and reception transducer, its mid frequency is 40kHz, 60 degree of directivity angle, waterproof enclosure.

3. the on-line monitoring sonar equipment of solid refuse in sewage pipe duct according to claim 1, it is characterised in that: the interface circuit of gain control circuit that pre-amplification circuit that described reception circuit is made up of front chip NJM2100, AD603 chip form and the 40kHz bandwidth-limited circuit that MAX274 chip forms, the envelope detection circuit that NE5532 chip forms and S3C2440 microprocessor forms.

4. the on-line monitoring sonar equipment of solid refuse in sewage pipe duct according to claim 1, it is characterized in that: described main control module includes ARM9S3C2440 microprocessor, radiating circuit is controlled 4046 oscillating circuit output 40kHz continuous signals by main control module ARM9S3C2440 microprocessor.