BATmode S/S+ - System
The BATmode is the central unit of the bat detection system for wind turbines. Its Intel i3 CPU and the Windows® 10 operating system provide an enormous flexibility and intuitive operation.
For a calibrated bat call detection and a reliable separation of call sequences from noise the external UltraSoundGate from Avisoft Bioacoustics is utilized. With a resolution of 16 bit and a sampling frequency of at most 300 kHz high-quality real time recordings of bat calls are achievable. In combination with a 128 GB (S) or 256 GB (S+) SSD, respectively, the automated real time monitoring over a complete year is possible without changing memory devices even once. To guarantee for data integrity the system daily backups recorded data on external drives.
For an efficient bat monitoring in the nacelle of wind turbines a high availability and accessability of the BATmode S/S+ is substantial. Therefore, we implemented various ways to access the system. On the one hand you can use tethered interfaces of the BATmode S/S+ (USB, Minidisplayports, LAN) to connect it on-site or control it remotely via ethernet connection. On the other hand you can also apply wireless interfaces. A WIFI connection to the tower base, for instance, allows for remote desktop control and even broadband transmission of the recorded data (exclusively BATmode S+). Furthermore, if mobile network is available on-site, remote desktop control of the system is also possible via the integrated cellular modem (UMTS for S and LTE for S+). In case of low transfer rates of cellular network connection, you can also transmit major control commands via SMS.
The BATmode S/S+ needs a conventional power supply of 100-240V 50/60Hz AC. In case of power failure the bat monitoring will be interrupted. However, on returning power the system will restart automatically and continue a started bat monitoring.
In addition to acoustical data the S+ version of the BATmode-System is also capable to acquire environmental conditions like temperature and precipitation rate. A corresponding temperature sensor is integrated in the antenna disc and is part of the scope of delivery. To acquire precipitation rates an optical precipitation sensor can be purchased separately.
The aluminium made microphone disc is used for a well-defined installation of the ultrasound microphone as well as the test signal speaker in the bottom of the nacelle. The diameter of the required mounting hole is 100 mm and, therefore, complies with most available detection systems. To avoid weather caused condensate formation an electrical heating unit is integrated. It guarantees a constant microphone sensitivity over an whole monitoring period, which can be monitored by the test signal speaker and allows for an high quality of data. The integrated preamplifier reduces signal noise and enables distances of 50 m and more between BATmode S/S+ and microphone disc. To protect them from weather conditions all electrical components are incorporated splashproof.
Antenna disc (exclusively BATmode S+)
Remote accessability to bat monitoring system BATmode S+ highly depends on the reception of WIFI and cellular network signals. The detached antenna disc, which is mounted in the bottom of the nacelle next to the microphone disc, and its included cellular LTE antenna provides the best possible reception of mobile network. Furthermore, by applying a directional antenna a broadband WIFI connection to the tower base can be established and allows for remote access to the system even if mobile network reception at the site is poor. The splashproof disc additionally contains a temperature sensor and can be installed easily due to the required mounting hole diameter of 100 mm, which is the same like for the micophone disc. Consequently, tool requirements for the installation are minimized.
Since the BATmode S - System not supports WIFI remote access or the acquisition of temperature date, the system is delivered in the S version without antenna disc. Nevertheless, in order to allow for remote acces via cellular networks, the BATmode S - System is delivered with a UMTS cellular antenna with magnetic base.
The software BATcontrol is used to control and parametrize the BATmode S/S+ - System as well as the recording software RECORDER of Avisoft Bioacoustics. Consequently, we are able to combine the proven advantages of RECORDER (outstanding bat call recognition filter, calibrated filter trigger, full spectrum recordings in real time) with various features for remote control and data evaluation specifically adapted to the needs of bat monitoring at the nacelle of wind power plants. By applying a predefined set of parameters, which complies to legal guidelines, the operation of the system could be simplified and you only have to adjust site-individual settings.
To minimize costs for on-site maintenance and keep an eye on the status of the system BATcontrol is able to send you the most important parameters either via SMS , mail or our cloud service myBAT on your phone or desktop pc. Furthermore, myBAT also gives you the opportunity to evaluate information about the recorded data in real time and export them to external tools. If you want to change some major settings, you can control BATcontrol via myBAT or even SMS commands if mobile network reception is poor. But you cannot only change major settings. If a sufficient mobile network connection is available at the site, you can establish a full remote desktop connection to the system. And if reception is insufficient, you can simply use the WIFI hotspot provided by BATcontrol to access the system from the tower base (available only with BATmode S+).
Since it is difficult to assess the quality of recorded data and exclude noise recordings BATcontrol provides graphic evaluation tools and supports you to evaluate recorded data on the fly. So you are able to intervene and avoid unusable data in advance. Furthermore, data compliance to legal guidelines can be guaranteed by monitoring the microphone sensitivity with the integrated test signal speaker and the appendant graphic assessment tool.
In addition to acoustical data BATcontrol also enables the acquisition and evaluation of weather conditions like temperature and precipitation rate (available only with BATmode S+).
Head-to-head comparison of BATmode S and BATmode S+
|BATmode S||BATmode S+|
|Operating system||Windows® 10||Windows® 10|
|Processor||Intel Core i3-5010U||Intel Core i3-5010U|
|Hard disc drive||128 GB SSD||256 GB SSD|
|RAM||8 GB||8 GB|
|Interfaces||4x USB, LAN, 1x Minidisplayport||4x USB, LAN, 1x Minidisplayport|
|Bat detector||UltraSoundGate 116Hnbm (Avisoft)||UltraSoundGate 116Hnbm (Avisoft)|
|Resolution||16 bit||16 bit|
|Sampling frequency||300 kHz||300 kHz|
|Microphone||Knowles FG||Knowles FG|
|Microphone heating unit|
|Recording software||Recorder (Avisoft)||Recorder (Avisoft)|
|WIFI remote access|
|LAN remote access|
|Cellular remote access|
|Cellular network||HSPA (UMTS)||LTE|
|Antennas||Cellular antenna with magnetic base||Antenna disc with temperature sensor|
|Status Mail / SMS|
|SMS remote control|