摘要
电话自动计费器是用于公用电话亭，对电话进行自动计费的仪器．本文介绍了一种新型的电话自动计费器．它以ＭＣＳ－５１单片计算机为核心，采用反极、通话语音、人工强计三种信号计费方式对电话进行自动计费．计费器的使用范围更加广泛；计费准确、可靠；用户使用更加方便．本文介绍了整个计费器系统的硬件电路配置，并重点介绍了关键的信号输入接收电路．在软件上着重介绍了数据的采集与处理的方法．
The automatic accounting system of telephone call is a meter to accounte the subscriber call charging in a public telephone stall.In this paper, a new automatic accounting system of telephone call is introduced. The Mcs- 51 single chip microprocessor is used in this meter. Three ways to accounte the cost, including the signal of reverse polarity, speech signal and artificial pushbutton signal, are used to accounte the call charging automatically. The range in which the accounting system can be used is more wide. The cost counted is accurate and reliable. Users can operate it very conveniently. The article introduce the hardware circuit structure of the accounting system and major signals input and receiving circuits. On software way, the method of data acquisition and process is introduced especially.
出处
《长沙铁道学院学报》
CSCD
1994年第1期72-77,共6页
Journal of Changsha Railway University
关键词
计费器
反极
语音
电话
the accounting system, reverse polarity, speech
