Abstract:
A numerical controller such that the causes of system stop due to abnormality in the communication of error detecting or error correcting system are easily found and the measure to be taken to eliminate the causes is easily examined. In the numerical controller which performs communication by using error detecting codes or error correcting codes, a monitoring means monitors and outputs the name of communication line through which an error is detected in the data received or an error in the data received is corrected, the number of occurrences of communication impossibility and the times at which the communication impossibilities occur. An error detecting and corrected-state storing means stores information from the monitoring means by observing the information for every communication line and outputs the information representing the error detection and the corrected state. A displaying means displays the information outputted from the error detecting and corrected-state storing means in accordance with the command given by the operator.
Abstract:
Multiple devices (16, 16a) that are each suitable for use at a selected one of multiple locations (15) are managed using a network (10) of links (12) that are each assigned to one of the locations (15). Each link (12) is selectable between a state in which a device (16) is not using the link (12) and a state in which one or more devices (16) are using the link (12). Links (12) that are in use by the devices (16) are identified and the locations (15) at which the devices (16) are used are determined based on the indentities of the links (12) that are in use.
Abstract:
There is provided a transmitter/receiver system for locating a misplaced object, such as eyeglasses (34), which includes a transmitter unit (10) which generates a signal when energized by power means such as a battery (20) and switch of a flashlight (26) and a receiver unit (30) on or disposed in the frame of the eyeglasses (34) having an antenna (36) responsive to the signal of the transmitter, a detector (38) and an electronic switch means (40) which changes state between an on status and an off status and which comprises a capacitor and a signal device coupled to an alarm oscillator (43) which is energized when the change occurs and when the capacitor discharges, thereby emitting an audible tone which attracts the user to the location of the eyeglasses (34). The receiver unit (30) is powered by means comprising a low frequency oscillator (46) which is continuously oscillating to intermittently power the receiver unit (30) and thereby save energy.
Abstract:
A control and communication system for communicating with, and at least remotely controlling switching between an initial and a first state of, an apparatus, a device or a system, such as an electrical power supplying system, comprises: a central control unit for generating a first control signal representing the first state of the apparatus, device or system, the central control unit comprising a first input for receiving a first input signal representing the state, and an output for outputting the first control signal; a radio transmitter connected to the output of the central control unit for receiving the first control signal from the central control unit and for broadcasting a first broadcast in response to the receipt of the first control signal; and a first radio receiver or a first plurality of radio receivers for receiving the first broadcast from the transmitter, the radio receiver(s) being arranged at a respective switching means and generating a first receiver signal in response to the receipt of the first broadcast, the receiver signal causing the switching by the switching means.
Abstract:
A tongue activated communications controller (10) includes an intra-oral transmitter assembly (12) having a keyboard (36) having a plurality of tongue activatable positions (38) for encoding a signal depending on the position activated and a transmitter (98) for transmitting encoded signals. The intra-oral transmitter assembly (12) includes a two sided printed circuit board (20). The first side (22) includes electronics for transmitting signals and the second side (24) includes circuitry for switching from one position to another. The controller (10) further includes a receiver (16) for receiving the encoded signals from the transmitter (98). The receiver (16) sends the signal to a microcomputer (18) for decoding the encoded signals for forming a set of instructions for operating a device from the decoded signal. The microcomputer (18) sends the signals to a device to be operated.
Abstract:
An I/O network channel (140) achieves relatively high rates of data communication between a plurality of widely physically dispersed devices interconnected by a LAN-type media (170). A processor (172) connected to each node (174) of the media controls the data transmitting and receiving functions at each node to establish network level, transport level and session level data communication and control functions.
Abstract:
A data transmission arrangement for bi-directional transmission of bit-sequences between a central unit (CCU) and a plurality of terminal units (TU1, TU2, ...) is provided which is particularly adapted for data acquisition and feedback signaling of messages, and for process control. In the arrangement the data transmission can occur simultaneously with the power supply of the terminal units over a two-lead cable (L), to which a large number of terminal units can be connected in parallel. The method of operation of the arrangement permits an advantageously simple construction of the transmission and reception equipment in the central unit and the terminal units.
Abstract:
A bus-system with a master station (1) and multiple slave stations (11,12, 13). The slave stations (11,12,13) have a connecting switch. When the connecting switch (14) of a first slave station (11) is open the following slave stations (12,13) no longer have any electrical contact with master station (1). The first slave station (11) is initialized during this phase. A test switch is closed (15) before the connecting switch (14) is closed and the current flow is limited by a current limiter (16). It is thus possible to check whether the following slave station (12) has a short circuit.
Abstract:
A method and a system for continuously transmitting railroad information between an on-board controller and a ground controller. A redundancy code which is updated according to a preset procedure at every transmission is added to the information to be transmitted, and the resultant is transmitted. On the receiving side, the redundancy code received together with the transmitting information is collated with a redundancy code which is prepared on the receiving side and updated according to a preset procedure. Therefore, the fault of the transmission route is detected easily, and the safety of train by means of the automatic train control is improved.
Abstract:
A two-way messaging system using an inbound overlay system (50) to an outbound paging system (10) having a user access terminal (12) with a subscriber list, a controller (14), and a base station transmitter (16), the inbound overlay comprises a plurality of subscriber units (56), each of the plurality of subscriber units being capable of receiving and decoding outbound selective call messages from a base station transmitter and for transmitting inbound signals (57), a plurality of overlay base receivers (54) wherein at least one of the plurality of overlay base receivers receives and decodes the inbound signals from the subscriber unit to provide inbound decoded information, and an overlay user access terminal (52) for managing and correlating the inbound decoded information with the subscriber list.