Development of the transportable multiple wave measuring apparatus which enables the field observation in nearshore area without facilities like an observation pier.

设计并制作了一套近岸波流测量装置。通过我们现场测量的经验，我们认为仪器应该可以由一到两个人运输，并且不需要连接到记录或电源设备的电缆，以便安全和方便地部署，并且不应该打开容纳电子设备的外壳的盖子来更换记录介质或电池。此外，部署在阵列中的多台仪器中的每一台都必须使我们能够进行同步测量，以便我们能够获得同步数据，尽管它们在电气上是完全分开的。该装置由测量单元、电源单元、记录单元、控制单元、通信分路单元组成，测量单元由压力表和电磁海流计组成。EMCM的可测量范围为(]sy.+-。[)3.0米/S(()SY+-.[)1.5V)。The Signa…多个磁悬浮轴承与指南针一起存储在内存中，然后写入PCMCIA闪存ROM。电源为容量为12V25ah的密封铅酸蓄电池。该装置的所有部件都安装在防水和耐压的不锈钢外壳中。在安装该装置之前，使用连接到便携式计算机的光学数据通信模块，通过红外通信端口将控制数据和测量计划写入外壳外部的无电接触的只读存储器上。测量数据也通过使用光通信模块来提取。传输速率为115Kbit/S，传输4兆字节的数据大约需要13分钟。为了利用多个设备同时获得数据，使用多分支通信单元来传输控制信号和测量时间表，并启动对时钟脉冲的计数。该仪器在福建海滩的测试结果令人满意。较少

An appratus for the measurement of waves and currents in near-shore area was designed and fabricated. Through our experience of field measurements, we have had ideas that the instruments should be transportable by one or two persons and free from cables connecting them to recording or power supplying devices for safe and easy doployment, and that they should be unnecessary to open the lid of the case which houses the electronic unit to change recording media or battery. Moreover, each one of multiple apparatuses deployed in array must enable us to make synchronized measurements so that we can obtain simultaneous data, although they are completely separated electrically. The apparatus consists of the following units ; 1.measuring.unit, 2.power supplying unit, 3.recording unit, 4.control unit, 5.communication branch unit.The measuring unit is composed of a pressure gauge and an electromagnetic current meter. The measurable range of the EMCM is (]SY.+-。[)3.0m/s ((]SY.+-。[)1.5V). The signa … More ls are stored in memory together with the magnetic bearings taken with a compass, then they are written on PCMCIA flash ROM.The power source is a sealed lead acid battery with capacity of 12V25Ah. All parts of this unit are housed in a watertight and pressure resistant stainless steel case. Prior to station the apparatus, control data and measuring schedule are written on the ROM f the outside of the case without electrical contact through infra-red communication port using an optical data communication module which is connected to a portable computer. The measured data is also withdrawn by using the optical communication module. The transmission rate is 115Kbit/s and it takes about 13 minutes to transmit data of four megabytes. In order to obtain simultaneous data using multiple apparatuses, a multiple branch communication unit is used to transmit control signals and measuring schedule, and to start up counting clock pulses. Test results of the apparatuses at Fukiage beach were satisfactory. Less