JPH06237230A - Self-diagnostic method for radio system - Google Patents

Abstract

PURPOSE:To improve reliability by connecting a calibrating signal device to an output line of a sensor signal processor. CONSTITUTION:A calibrating signal input device is connected to an output line of a sensor signal processor. In such a way, the same processing as a sensor signal can be executed, and a prescribed applying signal of an AC is inputted to a sensor input signal (DC signal), therefore, by discriminating DC/AC signals, an equipment monitoring state can be checked. This DC signal, that is, a calibrating signal is transmitted by the same processing as a regular sensor signal, and also, transmission and reception are executed plural times, and abnormality of a transmitting side and a monitoring side is decided. In such a way, a self- diagnosis of the whole transmission system and identification of an abnormal part can be executed without stopping continuous monitoring of an equipment, and the system having high reliability can be constructed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless system self-diagnosis method for continuously monitoring an abnormality in industrial machinery.

[0002]

2. Description of the Related Art Conventionally, regarding the abnormality detection of an electric signal input circuit, for example, a signal input device known in Japanese Patent Publication No. 63-126041 receives two sets of input signals in which the same input signal is made into two systems. A connector and two sets of input circuits for individually receiving the two sets of input signals via the connector, a mismatch detection unit for detecting a mismatch between the two sets of input circuits, and a mismatch detection for a predetermined time by the mismatch detection unit. A signal input device provided with delay means for generating error information in response to continuation, that is, when contact failure of a connector or failure of one of the two input circuits is detected, it is detected that the two input signals do not match. As a result, error information is automatically generated. In addition, there is also known a method of preparing a check base for outputting a reference voltage in advance and diagnosing the quality of the sensor input signal and the switching transmission path at the time of system check.

[0003]

In the conventional method as described above, there is a problem that the equipment cannot be monitored at the time of checking because the equipment monitoring state and the system check state are separate systems. Further, the conventional system check is a check on the transmitting side, and there is a problem that the entire check including the monitoring side cannot be performed and the abnormal portion cannot be fixed. That is, in the signal input device, there is a problem that the check cannot be performed unless there are the same two signals.
Therefore, the present invention provides a system capable of performing a check in a facility monitoring state by inputting a constant AC applied signal to a sensor input signal and discriminating a direct / AC signal.

[0004]

A method for self-diagnosing a wireless system of the present invention that achieves the above object is a method for continuously monitoring an abnormality of industrial machine equipment. It is possible to determine an abnormality on the transmitting side or the monitoring side by transmitting a specific frequency from the monitoring side and applying a constant signal when the transmitting side receives the signal multiple times by transmitting and receiving the signal. It is a characteristic self-diagnosis method of a wireless system.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. By connecting the calibration signal input device to the output line of the sensor signal processor as shown in FIG. 1, it is possible to perform the same processing as the sensor signal. That is, the system is a system in which a constant AC applied signal is input to the sensor input signal (DC signal), and therefore a direct / AC signal is discriminated from each other so that the system can be checked in a facility monitoring state.

FIG. 2 is a block diagram showing the relationship between the monitoring unit and the transmitting unit according to the present invention. As shown in FIG. 2, when a monitoring unit receives a start command, the transmission unit transmits data a plurality of times, and this feedback transmission allows the entire transmission system to be checked. That is, in order to check the entire transmission system, a system that can activate a constant applied signal from the monitoring side and a system that feeds back the applied signal to the monitoring side are used. Moreover, the constant application signal is transmitted by the same process as the normal sensor signal, and the constant application signal uses an AC signal.

FIG. 3 is a diagram showing a monitoring side reception signal according to the present invention. As shown in FIG. 3, on the monitoring side, in the case of (A), the monitoring side transmission line failure is indicated by the signal level or pattern received a plurality of times. This is a so-called monitoring abnormality. In the case of (B), a transmission line failure on the local station side is shown. This is a so-called transmission error. In the case of (C), a defect in the local station signal processing unit can be determined, and further, it can be determined for each input channel. This is a so-called transmission side processing device abnormality. In this way, in order to identify the abnormal part, the system can be judged by the difference in the signal reception level on the monitoring side by transmitting and receiving a plurality of times.

As described above, the calibration signal and means for activating the monitoring side are provided, the monitoring side transmits a specific frequency, that is, an AC signal, and the transmission side receives the AC signal, which is a constant application signal, and at the same time, The AC signal, that is, the calibration signal is transmitted by the same processing as that of a normal sensor signal. Moreover, the transmission / reception is performed a plurality of times to determine the abnormality on the transmission side and the monitoring side.

[0009]

As described above, according to the present invention, the self-diagnosis of the transmission system can be performed without stopping the continuous monitoring of the equipment, the whole self-diagnosis of the transmission system and the abnormal portion identification can be performed, and the system is highly reliable. It has an extremely excellent effect of being able to.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing a relationship between a monitoring unit and a transmission unit according to the present invention.

FIG. 3 is a diagram showing a monitoring side reception signal according to the present invention.

Claims (1)

[Claims] 1. A method for continuously monitoring an abnormality of industrial machine equipment, comprising means for applying a constant signal to a transmitting side and means for activating the monitoring side, wherein the monitoring side transmits a specific frequency and the transmitting side A self-diagnosis method for a wireless system, characterized in that an abnormality on the transmitting side / monitoring side is determined by performing the transmission / reception in which a constant signal is applied by receiving the signal a plurality of times.