JPS5862798A - Pulse integration counting 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 The present invention relates to an improvement in a pulse integration counting method that counts and calculates incoming pulses according to a measured value and records or displays an integrated value.

The amount of power generated by a power plant in a remote mountainous area, or the amount of water in a river, irrigation canal, etc., is transmitted as a number of electric pulses at a fixed time interval to a remote monitoring station via a wireless or wired transmission line, and the pulses are counted, calculated, and processed at the monitoring station. It has already been implemented to calculate the total amount, understand the situation at any given time, and perform each management task smoothly.

Figure 1 (A) shows an example of the configuration of the receiving section in the river flow rate i viewing terminal station using a block diagram, and Figure 1 (B) is an operating state diagram with time on the horizontal axis and count values on the vertical axis. shows.

The pulse train that arrives at the input terminal l according to the quantity to be measured is counted in the stitch count circuit 2, and the arithmetic circuit 3 calculates the number of stitches for each unit time T using arbitrarily selected tact pulses and compares it with the value at the previous unit time. A comparison is made, and in the final totalization display and recording device 4, for example, the flow rate at a predetermined point in time is displayed on a display and typed out on a recording sheet, as is known. 5 indicates a tact pulse input terminal to be applied.

The stitch count circuit 2 may be either electronic or mechanical, but as shown in FIG. 1(b), it draws a sawtooth waveform and when the maximum stitch count is reached, it returns to zero and restarts. What is displayed and recorded by the integration display/recording device 4 is, for example, the flow within a unit time at each point in time (first
(b)), and the difference in flow rate before and after (increase or decrease). In the diagram, the flow rate at time ■ is higher than the flow rate at time ■.
The increase in flow rate is therefore displayed and recorded.

Generally, when the electronic stitch count circuit is turned off, even if the maximum count value has not been reached, it is so-called cleared and returns to zero, and when restarted, it starts from zero.

In addition, mechanical counting devices retain the value immediately before the power is turned off,
When restarting, it starts from the held value.

The change in the count value at time point (2) in FIG. 1(b) shows this state, where time t is the time length of the power cutoff, and the chain line shows the case of a mechanical counting device. It is clear from the figure that the flow rate display and record at point (3) when the power supply was interrupted is not the true value.

In order to increase the reliability of the system, the power supply device is equipped with a backup power supply, and the time length t of power outage is extremely short (therefore, when using a mechanical counting device, there is no significant error, but it is more reliable, In the case of electronic stitch count circuits, which are suitable for high-speed conditions and are widely used, even if the power is restored instantaneously from a power outage, the display record at time point (3) will have a large error, and there is no means to detect this.

The present invention provides this type of pulse integration stitch count system equipped with this sensing means.

In the present invention, this purpose is to display or record information at points including the functional outage period by using an identification signal by a means for detecting a functional outage of the counting circuit in combination with a tact pulse used to obtain an integrated value at fixed time intervals. This is achieved by detecting errors in the data that is used.

The means for detecting the stoppage of the stitch count circuit due to a power cut is the state memory circuit, for example, one state of a flip-flop circuit ("
1'' position) to another state (0'' position). By combining the identification signal generated by this conversion with the tact pulse restarted when the power is restored, a mark indicating that the immediately preceding display and recorded data is incorrect is added to the display and recorded data and recognized.

The gist of the present invention will be specifically explained below with reference to illustrated examples. The same reference numerals indicate the same objects throughout the figures.

FIG. 2(a) shows the configuration of the pulse integration stitch count method according to the present invention as a block diagram, and FIG. 2(b) shows time on the horizontal axis, count value (A) on the vertical axis, and state memory circuit. It is a characteristic diagram showing a state change (B) and a tact pulse (TP).

The state memory circuit 6 configured as a flip-flop circuit (S indicates set, R indicates reset) receives a tact pulse T applied from the terminal 5 in a normal steady state.
Pc, ``Therefore, the state ``1'' indicating a steady state is stored, and the pulse train corresponding to the measured value arriving at the input terminal l is counted in the counting circuit 2 as described above, and is counted in the arithmetic circuit 3. Tact pulse T supplied from terminal 5
The flow rate is totaled for each unit time T by P and compared with the value in the previous unit time, and the flow rate at a predetermined time is displayed on the display and typed out on recording paper in the final integration display/recording device 4.

If a power failure occurs at point P at this point, the counting circuit 2 will be cleared and the count value will be zero, and at the same time, the state memory circuit 6 will also change its output because it uses the same power source as the counting circuit 2. The state becomes "0", and when the power is restored after a period of time, the stitch count circuit 2 sends the counted value from zero to the arithmetic circuit 3 again.

In addition, the state memory circuit 6 changes from the state "0" to the state "■" by the first tact pulse TP' after the power is restored, and the identification signal at that time is sent to the arithmetic circuit 3 to record the restarted count value. As a signal indicating that the calculation result is erroneous, an error mark, such as an * mark, is displayed on the display of the integration display/recording device 4 or on the recording paper, or is added to the typeout on the recording paper.

In the subsequent display and type-out, since the state storage circuit 6 stores the state "1", the display without the * mark and type-out are made, and the distinction between the two can be identified.

The present invention is not limited to the illustrated example, but can be modified as appropriate within the scope of the claims.

[Brief explanation of the drawing]

FIG. 1(A) shows an example of a known configuration of a receiving section using the pulse integration counting method, with a block diagram.
Figure 2 (b) shows an operating state diagram with time on the horizontal axis and count values on the vertical axis, Figure 2 (a) shows a block diagram of an embodiment of the present invention, and Figure 2 (b) shows time on the horizontal axis. The vertical axis represents the needle value (A→
, state memory In the figure, 2 is a counter, 3 is an arithmetic circuit, 4 is an integration display and recorder, 5 is a supply terminal for tact pulse TP,
6 indicates a state memory circuit. Figure 1 Ivy Figure 2

Claims (1)

[Claims] When counting and calculating the pulses that arrive according to the measured value and recording or displaying the integrated value at regular intervals, an erroneous integrated value due to a malfunction of the counting circuit is recognized as an identification signal by a means for detecting the malfunction. A pulse integration counting method characterized in that detection is performed in combination with the tact pulse at fixed time intervals.