JP2007071644A - Peak hold circuit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a peak hold circuit which stores, when a desired parameter satisfies a trigger condition, various kinds of parameters at that time. <P>SOLUTION: The peak hold circuit comprises a peak detection circuit to which the desired parameter out of a plurality of parameters is input and which detects a trigger from the parameter and a hold circuit to which the plurality of parameters are input and which stores the plurality of parameters when the peak detection circuit detects the trigger of the desired parameter. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a peak hold circuit that stores various parameters at the time when a desired parameter satisfies a trigger condition, and particularly to a measuring device that measures a plurality of parameters such as a power meter, an oscilloscope, and a multipoint recorder. Related to the peak hold circuit.

  The measurement device measures a desired parameter according to the application. For example, a power meter needs to measure a plurality of parameters in addition to the power value. In the conventional measuring apparatus, peak hold is individually performed for these plural parameters. Prior art documents of conventional peak hold circuits include those disclosed in Patent Document 1 and Patent Document 2.

Japanese Patent Laid-Open No. 03-046771

Japanese Patent Laid-Open No. 02-304371

  A conventional peak hold circuit will be described below. FIG. 3 is a configuration diagram of a conventional peak hold circuit. The power value output means 10 outputs a power parameter (data signal) corresponding to a power value of 150 VA, for example. The current value output means 20 outputs a current parameter (data signal) corresponding to a current value of 1 A, for example. The voltage value output means 30 outputs a voltage parameter (data signal) corresponding to, for example, a voltage value of 100V.

  The hold circuit 40 includes a power value hold circuit 41, a current value hold circuit 42, and a voltage value hold circuit 43, and these circuits store various parameters. The power value hold circuit 41 stores the maximum value or the minimum value of the data signal output from the power value output means 10 as a hold power value. The current value hold circuit 42 stores the maximum value or the minimum value of the data signal output from the current value output means 20 as a hold current value. The voltage value hold circuit 43 stores the maximum value or the minimum value of the data signal output from the voltage value output means 30 as a hold voltage value.

  Next, the operation of FIG. 3 will be described with reference to FIG. FIG. 4 is a table showing how various parameters stored in the hold circuit 40 change every time a data signal is input. When the power value 150 VA, the current value 1 A, and the voltage value 100 V are input as the first data, the power value hold circuit 41, the current value hold circuit 42, and the voltage value hold circuit 43 of the hold circuit 40 respectively have these values. Remember.

  Even if the power value 140VA, the current value 0.9A, and the voltage value 99V, which are the second data, are input, these values are all lower than the first data, so that various parameters of the hold circuit 40 are all changed. do not do.

  When the power value 180VA, the current value 1.2A, and the voltage value 90V, which are the third data, are input, the power value 180VA and the current value 1.2A are higher than the hold power value and the hold current value, respectively. The value is overwritten and stored in the power value hold circuit 41 and the current value hold circuit. Since the voltage value 90V is lower than the hold voltage value, the hold voltage value stored in the voltage value hold circuit 43 does not change.

  When the power value 130VA, the current value 0.9A, and the voltage value 120V, which are the fourth data, are input, the data stored in the hold circuit 40 changes as follows. In other words, neither the hold power value nor the hold current value changes, but the voltage value 120V is higher than the hold voltage value 100V, so it is overwritten with 120V.

  Even if the power value 160VA, the current value 1A, and the voltage value 110V, which are the fifth data, are input, these values are all lower than the hold power value, the hold current value, and the hold voltage value, and are therefore stored in the hold circuit 40. None of the various parameters change. In the example of FIG. 3, the maximum value is set to be held, but the minimum value may be held.

  However, in the peak hold circuit of FIG. 3, since the maximum values of various parameters are held, for example, when the power value that is a desired parameter is maximum (that is, the power value 180 VA that is the input value of the third data in FIG. 4). In order to know other parameters (that is, a current value of 1.2 A and a voltage value of 90 V, which are data input values in FIG. 4), all of the data had to be acquired and analyzed again.

  The present invention has been made in view of this problem, and an object of the present invention is to provide a peak hold circuit that stores various parameters at that time when a desired parameter satisfies a trigger condition.

In order to achieve such a problem, the invention described in claim 1
A peak detection circuit that detects a trigger from a desired parameter among a plurality of parameters, and
A plurality of parameters, and a hold circuit that stores the plurality of parameters when the peak detection circuit detects a trigger of a desired parameter.

The invention according to claim 2
A peak detection circuit that detects a maximum value or a minimum value of the parameter when a desired parameter among a plurality of parameters is input;
A plurality of the parameters, and a hold circuit that stores the plurality of parameters when the peak detection circuit detects a maximum value or a minimum value of a desired parameter.

The present invention has the following effects.
When multiple parameters are input and the peak detection circuit detects the maximum or minimum value of the desired parameter, it has a hold circuit that stores multiple parameters, so you can understand the relationship with other parameters at that time And there is no need to analyze the data later.

  Hereinafter, a peak hold circuit according to the present invention will be described with reference to FIG. FIG. 1 is a block diagram of a peak hold circuit according to the present invention. In FIG. 1, the power value output means 10, the current value output means 20, and the voltage value output means 30 are the same as those in FIG.

  The peak detection circuit 210 receives a power parameter (data signal) from the power value output means 10 and stores the peak value in a storage unit (not shown). When a peak value is detected, the peak detection circuit 210 holds a hold signal in a hold circuit 220 described later. Is output. Here, the hold signal refers to a command for acquiring and storing various parameters to the hold circuit 220 when the power parameter input to the peak detection circuit 210 is maximum or minimum. The hold circuit 220 includes a power value hold circuit 221, a current value hold circuit 222, and a voltage value hold circuit 223. The hold signal output from the peak detection circuit 210 is input, and various parameters are stored.

  The power value hold circuit 221 stores the maximum value or the minimum value of the power parameter (data signal) output from the power value output means 10. The current value hold circuit 222 stores the maximum value or the minimum value of the current parameter (data signal) output from the current value output means 20. The voltage value hold circuit 223 stores the maximum value or the minimum value of the voltage parameter (data signal) output from the voltage value output means 30.

  Next, the operation of FIG. 1 will be described with reference to FIG. FIG. 2 is a table showing how various parameters stored in the hold circuit 220 change each time a data signal is input. When a power value of 150 VA, a current value of 1 A, and a voltage value of 100 V are input as first data, the peak detection circuit 210 detects a power value of 150 VA. Here, since no data is stored in the storage unit of the peak detection circuit 210, the peak detection circuit 210 detects the power value 150VA as the maximum value and outputs a hold signal to the hold circuit 220.

  The power value hold circuit 221, the current value hold circuit 222, and the voltage value hold circuit 223 of the hold circuit 220 that have received the hold signal from the peak detection circuit 210 store the first data 150VA, 1A, and 100V.

  Even if the power value 140VA, which is the second data, is input to the peak hold circuit 210, it is smaller than the first data 150VA. Therefore, the peak detection circuit 210 does not operate, and various parameters stored in the hold circuit 220 change. do not do.

  When the power value 180 VA, which is the third data, is input to the peak hold circuit 210, the power value is higher than 150 VA stored in the storage unit of the peak detection circuit 210. Output a hold signal. Upon receiving this hold signal, the hold circuit 220 stores the third data 180VA, 1.2A, and 90V in the power value hold circuit 221, the current value hold circuit 222, and the voltage value hold circuit 223, respectively.

  Even if the power value 130 VA of the fourth data and the power value 160 VA of the fifth data are input to the peak detection circuit 210, these values are smaller than the power value 180 VA stored in the peak detection circuit 210. The hold circuit 210 does not operate and does not output a hold signal. Accordingly, various parameters of the hold circuit 220 do not change. In the example of FIG. 1, the maximum value is set to be held, but the minimum value may be held.

  In this way, the maximum value of power, which is a desired parameter, is detected by the peak detection circuit 210, and various parameters at that time are stored in the hold circuit 220, so that it is not necessary to analyze necessary data later.

  In the present embodiment, the power meter has been described as an example, but a measuring device that measures a plurality of voltages and temperatures, such as an oscilloscope or a multipoint recorder, may be used.

It is a block diagram of the peak hold circuit by this invention. It is the table | surface which showed how the data value memorize | stored in the hold circuit 220 changes, whenever a data signal is input. It is a block diagram of the conventional peak hold circuit. It is the table | surface which showed how the data value memorize | stored in the hold circuit 40 changes, whenever a data signal is input.

Explanation of symbols

210 Peak detection circuit 220 Hold circuit 221 Power value hold circuit 222 Current value hold circuit 223 Voltage value hold circuit

Claims (2)

A peak detection circuit that detects a trigger from a desired parameter among a plurality of parameters, and
A peak hold circuit, comprising: a plurality of the parameters input; and a hold circuit that stores the plurality of parameters when the peak detection circuit detects a trigger of a desired parameter. A peak detection circuit that detects a maximum value or a minimum value of the parameter when a desired parameter among a plurality of parameters is input;
A peak hold circuit comprising: a plurality of the parameters, and a hold circuit that stores the plurality of parameters when the peak detection circuit detects a maximum value or a minimum value of a desired parameter. .

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