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昆虫与温度关系的探讨,是昆虫生态学中的重要研究课题之一,一般研究中除需备有控制幅度较小的恒温设备外,尚需解决由于自动控制系统发生故障而突然增高温度现象的问题,才能保证试验正常进行。目前一般采用栅极电子管温度控制器,来控制试验用温度。为了说明问题,先将控制器的工作原理简单地介绍一下。 图1是普通电子管温度控制器线路图,当导电表有水银柱与白银丝断开时,电子管的栅极没有负电压,本身成一整流电路,屏流通过继电器y,吸动衔铁,断开或者接通受控器件的电源。当水银柱上升与白银丝接合时,就是说AB间短路,栅极即产生—个负电压Umc,使屏流切断截止。继电器由于拉簧的拉力而释
The study on the relationship between insects and temperature is one of the most important research topics in insect ecology. In addition to the need for a constant temperature control device with a relatively small control range in general research, it is still necessary to solve the problem that the sudden increase in temperature due to the failure of the automatic control system The problem, in order to ensure the normal test. The current general use of gate tube temperature controller to control the test temperature. In order to illustrate the problem, the first controller works briefly introduce. Figure 1 is a common tube temperature controller circuit diagram, when the mercury vapor meter with silver wire disconnected, the gate tube has no negative voltage, itself into a rectifier circuit, the screen flow through the relay y, the armature suction, disconnect or Turn on the controlled device. When the mercury rises with silver wire bonding, that is between the short circuit AB, the gate that is produced - a negative voltage Umc, the screen flow cut-off. The relay is released due to the tension of the tension spring