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公开(公告)号：US5038372A
公开(公告)日：1991-08-06
申请号：US402727
申请日：1989-09-05
CPC分类号： H04M11/002 , H04M1/82
摘要： A system for transmitting data via a telephone line by means of a data communications device (4) connected to the telephone line, at least one other communications device being connected to the telephone line and each device being switchable between an inactive state, in which the device is not in use and presents a high impedance to the telephone line, and an active state, in which the device reduces the telephone line voltage and signals can be transferred between the device and the telephone line, the system including a telephone line state detection unit (10) associated with the data communications device (4) and connected to the telephone line for electrically monitoring the telephone line to provide an indication of the state of another communications device connected to the telephone line.
摘要翻译： 一种用于通过连接到电话线的数据通信设备（4）经由电话线路发送数据的系统，至少一个其它通信设备连接到电话线路，每个设备可在非活动状态之间切换，其中， 设备不被使用并且对电话线路呈现高阻抗，并且在该状态下，设备减少电话线路电压并且可以在设备和电话线路之间传送信号，该系统包括电话线路状态检测 与数据通信设备（4）相关联并连接到电话线的单元（10），用于电气监控电话线路以提供连接到电话线路的另一通信设备的状态的指示。
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公开(公告)号：US5193111A
公开(公告)日：1993-03-09
申请号：US815886
申请日：1992-01-06
IPC分类号： H04M11/00
CPC分类号： H04M11/00
摘要： A method and apparatus for controlling the transmission of data, via a telephone network (20), between a first location (2,14,16) where data is collected and a central station (22). Data transmission is effected by: collecting and storing data (24-36) at the first location (2); providing an indication (42) of the current time at the first location; storing, at the first location, an indication (30) of a selected time which is after the present time and an indication (32-36) of selected ones of the plurality of data types; comparing (42) the indication of the present and selected times and establishing a connection (56), via the telephone network (20), from the first location (2,14,16) to the central station (22) when the present time becomes later than the selected time; and effecting a communication, via the connection, which includes a first transmission (56) of the selected ones of the stored data type from the first location (2,14,16) to the central station (22) and a second transmission (58 ), from the central station (22) to the first location (2,14,16), of an indication of a new selected time, and identification of the data to be collected and the locations from which that data will be obtained, for the next communication.
摘要翻译： 一种用于经由电话网络（20）在收集数据的第一位置（2,14,16）和中心站（22）之间控制数据传输的方法和装置。 数据传输通过以下方式实现：在第一位置（2）收集和存储数据（24-36）; 在第一位置提供当前时间的指示（42）; 在第一位置处存储在当前时间之后的所选择的时间的指示（30）和所述多个数据类型中的所选择的数据类型的指示（32-36）; 当目前的时间比较（42）当前和选定时间的指示，并且经由电话网络（20）从第一位置（2,14,16）到中心站（22）建立连接（56） 比选择的时间晚; 以及经由所述连接进行通信，该连接包括从所述第一位置（2,14,16）到所述中心站（22）的所存储的数据类型中选择的所述数据类型的第一传输（56）和第二传输（58） ）从中心站（22）到第一位置（2,14,16），显示新的所选择的时间，以及要收集的数据的标识以及从哪个数据获得的位置，为 接下来的沟通。
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3.发明授权Power line carrier communication system for monitoring refrigerated containers 失效用于监控冷藏集装箱的电力线载波通信系统
公开(公告)号：US4885564A
公开(公告)日：1989-12-05
申请号：US189566
申请日：1988-05-03
申请人： Leonard C. Vercellotti , Arthur A. Anderson , David A. Christiansen , Dannis R. Johnson , Laurence R. Brickner , Robert G. Colclaser III , John G. Leddy
发明人： Leonard C. Vercellotti , Arthur A. Anderson , David A. Christiansen , Dannis R. Johnson , Laurence R. Brickner , Robert G. Colclaser III , John G. Leddy
CPC分类号： H04L29/06 , F25D29/008 , G05D23/1905
摘要： A power line carrier communication system for monitoring refrigerated containers which includes a master monitoring unit and a first power line interface which interchange messages in a first format. The first power line interface translates the first format to a second format suitable for power line environment, and messages in the second format are applied to a power line. Remote monitoring units receive the messages from the power line, and they return messages to the power line containing status data relative to refrigerated containers. The second format includes a message starting preamble having a duration and logic level which is not duplicated by normal operation of the apparatus, enhancing the probability of proper message synchronization and reception over noisy power line environments.
摘要翻译： 一种用于监视冷藏集装箱的电力线载体通信系统，其包括主监视单元和以第一格式交换消息的第一电力线接口。 第一电力线接口将第一格式转换为适合于电力线环境的第二格式，并且将第二格式的消息应用于电力线。 远程监控单元从电源线接收消息，并将消息返回给包含与冷藏集装箱相关的状态数据的电力线。 第二格式包括具有持续时间和逻辑电平的消息开始的前导码，该持续时间和逻辑电平不会由于装置的正常操作而被复制，从而增强了在噪声电力线路环境中适当的消息同步和接收的概率。
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4.发明授权Microprocessor based control system and method providing better performance and better operation of a shipping container refrigeration system 失效基于微处理器的控制系统和方法提供了更好的性能和更好的运输集装箱制冷系统
公开(公告)号：US4663725A
公开(公告)日：1987-05-05
申请号：US702271
申请日：1985-02-15
申请人： Gregory R. Truckenbrod , David A. Christiansen , Herbert S. Falk , Richard A. Johnson , Robert G. Colclaser, III
发明人： Gregory R. Truckenbrod , David A. Christiansen , Herbert S. Falk , Richard A. Johnson , Robert G. Colclaser, III
CPC分类号： B65D88/745 , B60H1/00014 , F25D29/003 , F25B2600/0252
摘要： A microprocessor based system monitors and controls a transport refrigeration system having a two speed compressor coupled to a condenser and an evaporator and further having two speed condenser and evaporator fans, a refrigerant modulating valve, and heater means to cool or heat a served space. A keypad is provided for operator entry of the temperature setpoint and for display selections. Return air and discharge air temperature sensors provide signals to the microprocessor for temperature control. The microprocessor is programmed to sequence or control the compressor, the fans, the modulating valve and the heater means for temperature control in accordance with one of four stored algorithms. One of the temperature sensors is used for control, and if it is detected to have failed automatic switchover is made to use of the other temperature sensor for temperature control. Various input signals from the refrigeration system and from the microprocessor hardware are processed by the microprocessor to provide a data log and data for display and to detect system faults for fault history storage and for protective control action.
摘要翻译： 基于微处理器的系统监测和控制具有耦合到冷凝器和蒸发器的双速压缩机的运输制冷系统，并且还具有两个速度冷凝器和蒸发器风扇，制冷剂调节阀和用于冷却或加热供应空间的加热器装置。 提供键盘以便操作员输入温度设定值和显示选择。 返回空气和排气温度传感器向微处理器提供温度控制信号。 微处理器被编程为根据四种存储的算法中的一种对压缩机，风扇，调节阀和用于温度控制的加热器装置进行排序或控制。 其中一个温度传感器用于控制，如果检测到故障自动切换，则使用其他温度传感器进行温度控制。 来自制冷系统和微处理器硬件的各种输入信号由微处理器处理，以提供用于显示的数据日志和数据，并检测故障历史存储的系统故障和保护性控制动作。
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