水产养殖系统的管理中,活鱼计数器是不可缺少的设备。目前,水产养殖场大多数用人工数鱼,或称重计数后推算,这既费时又费力,还常常搞错。法国,德国和挪威的专家都曾研制过计数器。所有这些计数器都采用一个光束和一个传感器。当鱼进入这个光束时,传感器就计一次。这样,有二条鱼或三条鱼同时通过或紧接着通过光束时,就有可能漏计。只要有一条鱼反跳一下,则又会多计。因此,都存有一定缺陷。1989年,桑伯建议采用过荷 Live fish counters are an indispensable device in the management of aquaculture systems. At present, the majority of aquaculture farms use artificial fish, or counting after counting, which is time-consuming and labor-intensive, and often mistakes. Counters have been developed in France, Germany and Norway. All of these counters use a light beam and a sensor. When the fish enters the beam, the sensor counts once. In this way, it is possible that two or three fish pass through or follow the light beam at the same time. As long as there is a fish bounce, then it will be more. Therefore, there are some shortcomings. In 1989, Sambo suggested overcharging