SQ-Series Non-contact discharge measurement for wastewater, sewage systems and industrial waters

Transcription

1 SQ-Sies Non-contact discharge measurement for wastewat, sewage systems and industrial wats so

2 Introduction Non-contact monitoring Innovative radar measurement technology as key The flow mets of the SQ-sies capture continuously and contact-free the flow rate of sew systems, ducts, semi-filled pipes and oth technical channels in the fields of wastewat and industrial effluents. The discharge calculation of the sensor, which is vy easy to install and to set up, is based on a hydraulic model. Non-contact level and flow velocity measurement is achieved using up-to-date radar technology, wheby the level is measured by means of ultrasonic or altnatively by radar technology. The sies consists of the diffent types SQ-3, SQ-6 and SQ-8R according to the level to be measured. MAINTENANCE-FREE and FAIL-SAFE Advantages of the non-contact measurement Since the is no direct contact to the wastewat, the measurement device remains free from soiling or deposits, as this frequently happens with submged type sensors. The custom gains from maintenance-free opation and increased reliability. Moreov, the sealed, UV and acid resistant housing of the SQ (rated protection class IP 68) withstands surcharge events and protects the valuable measurement equipment against aggressive atmosphes. so Somm GmbH office@somm.at

3 Theoretical Principles Measuring principle Flow velocity The measurement of the surface flow velocity is based on the Doppl frequency shift method: A radar signal is transmitted to the wat surface at a constant frequency of 24 GHz. The sensor measures the partially reflected signal whose frequency is shifted due to the wat movement. The surface velocity is detmined through a spectral analysis. Finally, the mean velocity results by applying an integrated hydraulic model and is used for the calculation of the discharge (flow rate). Flow rate The flow rate Q is detmined by the continuity equation. Q = v m A (h) Based on the cross-section profile at the measuring site the wetted cross-sectional area A(h) is detmined depending on the wat level. According to the hydraulic calculation the mean velocity v m results from the local surface velocity v l measured by the SQ sensor. Hence, the flow can be detmined and outputted directly from the flow velocity and the wat level. The sensor set-up and site calibration is done by the specifically developed and intelligent sensor software Q-Command. Level The wat level is calculated using a travel time measurement. The device sends short pulses ppendicularly to the wat surface. The distance to the wat surface and yet the corresponding actual wat level can be calculated by measuring the time intval from the emission to the reception of the reflected impulses. Optionally and according to individual requirements the level can be measured by an ultrasonic or a radar sensor. If the is considable foam on the surface the radar delivs more reliable results. Profile Wat level (W) Cross section A(h) One-time specification at the measuring site Discharge (Q) non-dimensional factor k = v m / v l + + Continous measurement Intnal calculation Local velocity (v l ) Mean velocity (v m ) Flow chart discharge calculation and illustration measuring principle measuring spot - local velocity (v l ) discharge (Q) Ctificated accuracy - The accuracy of the flow velocity sensor has been ctificated by METAS, the well-known Swiss Fedal Institute of Metrology. mean velocity (v m ) cross section A(h) Somm GmbH office@somm.at so M E S S T N I K E C H

4 Applications and Examples SQ in technical channels Process wat, shafts, semi-filled pipes etc. Broad field of application The SQ can be used for various diffent applications due to its compact design, its housing, which is wat-proof and resistant against aggressive liquids, and its convenient and simple installation solutions. Open channels, semi-filled pipes, shafts, ducts and oth technical bodies of wat are possible applications for the measurement of process, waste and industrial wat with the SQ. Mounting cube: vtical / horizontal variable fixation No construction in the wat Simple installation and integration in existing monitoring and control systems Data output via multiple intfaces: SDI-12, RS-485, Modbus, analog ( ma), pulse signal Optional: non-contact measurement of wat surface tempature Measuring range of the SQ The mounting height above the lowest wat level and hence the maximum measurement range for the level equals to 3, 6 or 8 mets (depending on the sensor sial type). The measurement range for the flow velocity is between 0.10 and 15 m/s. An accurate discharge measurement is even possible despite high turbidity or solid contents in the wat which commonly is the case in sewage. so Somm GmbH office@somm.at

5 Applications and Examples SQ in sewage treatment plants In- and outlet monitoring, storm-wat ovflows Modn facility management The amount of wat enting a sewage treatment plant is consided to be a key paramet. The continuous measurement of the flow rates is vy important to guarantee smooth and effective opation. Regulation and control of the plant and its processes (as for example the prop functioning of the aation basins) essentially depends on the current volume rates. With its non-contact measurement technology the SQ flow met is particularly advantageous for applications in wastewat with high turbidity and solid contents. Thefore the SQ ideally meets the needs and requirements of wastewat treatment plants. Accurate flow measurement also with high turbidity or solid contents in the wastewat Dimensioning and control of plant and Discharge values as basis for cost accounting processes Discharge monitoring for (re)adjustment of calculation models Somm GmbH office@somm.at so M E S S T N I K E C H

6 Applications and Examples SQ in sewage systems Discharge measurement and sew monitoring Monitoring flow rates Accurate monitoring of their discharge rates is a major intest of municipalities, local authorities, sewage boards and opators of big sew systems. Planning, allocation of costs and opation of the sewage network essentially depend on these data as well as the professional management of stormwat events. For this reason continuous and reliable measurements at key spots in the system or at storm-wat ovflow basins are a must. The contact-free measuring flow mets of the SQ-sies pfectly fulfil these requirements: Noncontact monitoring, thefore maintenance-free opation and unintrupted, reliable measurement data through our innovative radar technology. Flow Application in aggressive environments possible Wat-proof, tight housing High safety for staff and equipment Monitoring of vy little discharge rates possible, since the sensor measures from above. Increased safety during installation and maintenance Thanks to the convenient mounting bracket the installation of the SQ flow met in the sew can be done quickly and simple and even without the need to ent the manhole. This results in increased safety for your staff and easi access to the sensor. Variable mounting bracket for diffing opening diamets and installation depths. so Somm GmbH office@somm.at

7 System Solution: Mobile Monitoring Station Mobile, stand-alone station SQ Flow Met, logg and data transmission Self-supporting, independent and compact system For remote measurement sites without pmanent pow supply and landline wire connection the SQ can be equipped for remote opation. Including a data logg and data transmission technology (2G/3G/4G modem) togeth with a strong batty pack the SQ becomes a strong self-supporting and independent system ideally suited for applications in the field or extnal measurement stations. Optionally the system can be upgraded with a cama for visualisation of the current situation. Two removable boxes (IP 68) for batty pack and data logg/modem housing - easy to access, easy to exchange, easy to store. All tight and wat-proof. SOMMER Data Logg (MRL-7 or MRL-6) Intface Memory Functions Batty Additions (optionally) COM intface (RS-232), USB and Bluetooth failure resistant flash memory 4 MB intnal (equiv. to approx values) date/aggregate/mean values, intensity, maximum, etc. 22 Ah, rechargeable accumulator - easy to exchange, lifetime of 10 weeks at a measuring intval of 5 minutes & 2 data transmissions p day solar panel cama for site visualisation Integrated Modem for Data Transmission Modem Target sv Oth charactistics remote data transmission with 2G / 3G (4G optionally) optionally: GPS for location detection up to three target svs (http / ftp) simultaneously - independent transmission intvals possible - IP call activation for remote svicing - time synchronisation via NTP (Network Time Protocol) Removable Boxes Matial & charactistics glass fibre reinforced plastic (GRP), IP 68, easy to exchange Somm GmbH office@somm.at so M E S S T N I K E C H

8 Integration with Process Control System System integration with PLC s Flexible connections, wireless data transmission HTTP / FTP HTTP / FTP ma HTTP / FTP PROCESS CONTROL SYSTEM Mod/Profibus RS-485 / SDI-12 web sv pulse signal HTTP / FTP HTTP / FTP processes / systems Extnal monitoring sites (e.g. sewage system, waste wat channels, ovflow basins) Intnal system (e.g. treatment plant, industrial process, facility) Individual communication solutions Inside the plant or process unit the SQ station can be integrated with the process control system (PLC) vy easily, eith via a digital intface (Modbus/Profibus, RS-485 or SDI-12) or an analog ma connection (1x signal for wat level, 1x selectable for flow rate or flow velocity). Moreov, a separate pulse signal can be provided. Outside or extnal stations communicate with the PLC remotely via a web sv or directly, applying common HTTP or FTP protocols. so Somm GmbH office@somm.at

9 Sensor Software Q-Command Q-Command The smart sensor software Manage your measurement data The Q-Command is a vy convenient tool to opate the SQ at the measurement site. The sensor can be accessed directly via its digital intface or remotely in case the site is also set up for data transmission. Profile - create, amend, import or store profiles. Communication assistant - connect the device(s) to the laptop and leading through the menu. Paramet - modify paramets, adapt discharge table and upload paramets to the sensor. Measurement - show, store measurement values. Data - data files can be transfred, cleared, imported and are displayed in a diagram. Tminal - shows the current activities of attached devices in tminal mode. Sensor software to conveniently manage your monitoring station and multiple devices Site calibration, up/download and editing of sensor paramets Post-processing of measurement data Advanced settings input for expts Somm GmbH office@somm.at so M E S S T N I K E C H

10 Creating a Profile Cross section profiles Preset, combinations or file imports Choose your individual profile When setting up the measurement site, the specific cross section profile has to be defined. The sensor software Q-Command helps you to simplify this job offing a variety of pre-set geometries, combinations of the same or manual input. Standard profiles can be circular or rectangular and are created by simply enting its dimensions (e.g. height, width, diamet). The standard geometries can also be combined with each oth. Open and closed cross sections can be ented just as simple. Moreov, it is possible to edit special and complex profiles enting multiple geometric points or by importing an existing profile, e.g. as CSV-file. Standard profiles and combinations Open/Closed and special profiles Online data on web sv so Somm GmbH office@somm.at

11 Technical Details Technical details Non-contact SQ flow met Genal Dimensions (mm) Total weight 272 x 153 x 186 (L x W x H) 1 bracket for pipe with Ø 30 mm 1.55 kg Protection class IP 68 Pow supply Consumption at 12 V Opation tempature Storage tempature Protection V DC standby approx. 1 ma / active measurement approx. 140 ma C C ov voltage protection, revse pow protection, lightning protection Level measurement Sial type SQ-3 SQ-6 SQ-8R Measuring technology ultrasonic ultrasonic radar Level range m m m Blanking distance 0.3 m m Resolution 1 mm Accuracy +/ % FS +/ % FS +/- 2mm Frequency 26 GHz (K-Band) Opening angle Velocity measurement Detectable measurement range m/s (depending on flow conditions) Accuracy +/ m/s; +/- 1 % FS Resolution 1 mm/s Direction recognition +/- Measurement duration sec. Measurement intval 8 sec hrs Measurement frequency 24 GHz (K-Band) Radar opening angle 12 Distance to wat surface m Necessary minimum wave height 3 mm Automatical vtical angle compensation Accuracy +/- 1 Resolution +/- 0.1 Intface Analog output (SQ-analog) Pulse output Digital intface 2 x ma (1 x level; 1 x discharge or velocity - selectable) Pulse p volume (selectable units) 1 x SDI-12 1 x RS 485 or Modbus Transf rate: 1.2 to kbd Protocol: various ASCII-protocols Output: discharge, flow velocity, level, quality paramets Somm GmbH office@somm.at so M E S S T N I K E C H

12 so Head Office Sales Partns Somm GmbH Strassenhaeus 27, A-6842 Koblach +43 (0) Fax: +43 (0) Copyright Somm GmbH V-03/2017