JPS61899A - Telemeter input data monitoring system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a data logger equipped with a process microcomputer, and particularly to integration processing of telemeter data.

[Background of the invention]

Conventionally, when using a telemeter to monitor cumulative flow at a remote location, a flow meter using a ring counter 1 is used as shown in Figure 1.
The flow rate is integrated and the measured data is sent from the slave station telemeter 2 to the master station telemeter 3 using the telephone line 6. A data processing device 4 connected to the master station telemeter 3 receives data from the telemeter at a certain time (for example, end-of-day time).
This value is converted into an integrated value based on the reference value, and this value is monitored on the display device 5 or output to the printing device 6 for logging. Therefore, the data processing device 4 calculates the difference between the previous value and the current value of the ring color value sent via the telemeter, and adds the results (differences) to perform integration. However, since the communication between the telemeters is a serial transmission method, it is difficult to capture the timing of data establishment and input it into the data processing device 4. In recent years, telemeters have been used to issue data establishment signals to data processing devices, but the timing of relay operations may not be completely synchronized, causing erroneous data to be sent. Therefore, as shown in FIG. 2, when data is established in the data output circuit 3 through the data conversion circuit 2 in the master station telemeter 1, the data establishment signal 4 is sent to the digital signal input circuit 11 in the data processing device 10. , at this time, the sampling circuit 12 outputs the value obtained by adding the noise 5 to the output value of the data output circuit 3 to the digital input circuit 1.
It will be taken out from 1. Therefore, the sampling circuit performs multiple samplings during one sampling,
This is averaged and used as the output value at this sampling time. Therefore, the difference circuit 13 calculates the difference between the filtered data and the previous value stored in the previous data storage circuit 14, and the integration circuit 15 adds the difference. However, as shown in FIG. 3, the measurement data transmitted to the digital signal input circuit 11 of FIG. 2 essentially contains noise, and the output value of the spring/spring circuit 12 is It may not match the estimated value. As a result, a negative value will be included in the output value of the difference circuit 13 in FIG. 2, and the next integration circuit 15 will perform subtraction, resulting in a smaller integrated amount of measured values than the actual value. In addition, when the value of the ring counter passes through the value zero after one rotation, the difference circuit 13
In this case, the error of the current data and the previous data is also small. Therefore, it is difficult to distinguish whether the current data is a smaller value than the previous data due to the influence of noise or whether the ring counter has been reset, and the output of the integrating circuit 15 ends up being an abnormally large value. There was a drawback.

[Purpose of the invention]

An object of the present invention is to provide a data monitoring method for obtaining highly reliable human data necessary for integrating telemeter data.

[Summary of the invention]

In the data processing device, abnormal data is accumulated by considering not only the current data of the telemeter data (ring counter value) that comes in chronological order, but also the past data such as the previous time or the time before the previous time. By using this to determine between data after the ring counter is reset (normal data) and abnormal data where the current value is less than the previous value, the reliability of the data used for integration is increased.

[Embodiments of the invention]

An embodiment of the present invention is shown in FIG. 4 below. Data 1 and data establishment signal 2 from the telemeter are connected to a digital signal input circuit 3 in a data processing device, and are sampled at regular intervals by a sampling circuit 4 and converted into time-series data. This data is judged as abnormal data in the data check circuit 5, and the data after the judgment is used to perform integration.

The determination formula of the data check circuit is shown below.

Here, yj: Current output value of the data check circuit Nj: Current output value of the sampling circuit (current value of telemeter data) NJ-1: Previous output value of the data check circuit (normal previous value of telemeter data) Country r: Until the previous time Number of consecutive abnormal data occurrences δ: Increment between samplings of telemeter data (measured quantity) N: Upper limit value of the ring counter FIG. 5 shows time series data of the ring counter in the data check circuit. Time 1. In the range of -2 to 1°, the value of the ring counter does not indicate the value after reset, so as a data check circuit, the input value Nr (output value of the sampling circuit) is normally the previous value Nr-+ (of the data check circuit). It is sufficient to monitor that it is larger than the previous output value) and smaller than the previous value N1-1 plus δ (increment). If it is contrary to this, the current value is treated as abnormal data and the data check circuit The previous value N1-1 is used as the current output value y. However, 1 to the previous value Nj-1
If 11 abnormalities are included, the increment a is r
Monitoring is performed by adding a weight of j-1. Further, in the range up to t141, the value of the ring counter passes through the virtual point (N) and is reset, and becomes the value after reset Nj-I (NJ or +<N+). Therefore, in the data check circuit, in order to consider whether the ring counter has been reset when the current value N, becomes smaller than the previous value Nj-+, the distance from the previous value N,- to the virtual point (N) is calculated. and determine whether the current value can pass through the virtual point (N).

If the distance between the previous value N, -, and the virtual point (N) increases, l
If it is within −,・δ, the current value Nl is considered correct data,
The current value Nl is assumed to be NNj-+ 1 N 1 . Thereby, the differential integration of the data passed through the data check circuit is performed correctly.

FIG. 6 shows a flowchart in the case where the above-described condition determination calculation of the data check circuit is realized by software of a microcomputer.

〔Effect of the invention〕

According to the present invention, it is possible to improve the reliability of the manual data of the differential circuit in the data processing device, so that there is an effect that the performance can be further improved compared to the conventional telemeter data integrator.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of the flow rate integration system using a telemeter, Figure 2 is a functional diagram of the master station telemeter and data processing device,
FIG. 3 is a characteristic diagram of the ring counter value of the telemeter, FIG. 4 is a functional diagram of the data processing device, FIG. 5 is an explanatory diagram of the ring counter value of the telemeter, and FIG. 6 is a flowchart of the data check circuit. Figure 1E - 1...Telemeter data, 2...Data establishment signal,
3... Digital signal input circuit, 4... Sampling circuit, 5... Data check circuit, 6... Difference circuit, 7... Previous data storage circuit, 8... Integration circuit.

Claims (1)

[Claims] 1. A totalizer that integrates the flow rate using a ring counter, a telemeter that transmits the data to a remote location, a telemeter that receives this data, a digital input circuit that receives data from the receiving telemeter, and establishes reception data by sampling at a constant cycle. In a logging system that consists of a data processing device that has a sampling circuit that takes in data, a difference circuit that takes the difference between the current sampling value and the previous sampling value, and an integration circuit that adds the difference values, when performing difference addition. A method for monitoring telemeter input data, comprising a data check circuit that determines the validity of telemeter data.