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Power supply monitoring device, equipment and electromagnetic flow meter

A power monitoring and power circuit technology, applied in the direction of measuring devices, measuring flow/mass flow, liquid/fluid solid measurement, etc., can solve problems such as product function, performance impact, power instability, etc.

Inactive Publication Date: 2021-07-20
YAMATAKE HONEYWELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, depending on the environment in which the equipment is installed, the function and performance of the product may be affected due to the instability of the power supply (low-quality power supply, fluctuations in load, or fluctuations in the supply of natural energy).
In addition, there are cases where the supply of AC power is cut off due to necessary power cutoff work or unexpected power outages.

Method used

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  • Power supply monitoring device, equipment and electromagnetic flow meter
  • Power supply monitoring device, equipment and electromagnetic flow meter
  • Power supply monitoring device, equipment and electromagnetic flow meter

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0037] First, refer to figure 1 The power supply monitoring device 10 according to the first embodiment of the present invention will be described. figure 1 It is a block diagram showing the structure of the power supply monitoring device of 1st Embodiment.

[0038] figure 1 The power monitoring device 10 shown is a device that monitors the voltage level of the AC power supplied to the device 20 . Specific examples of devices to be monitored include electronic devices such as electromagnetic flowmeters used as industrial field devices in which CPUs execute various processing operations. It is especially suitable for applications where the following equipment is used as the monitoring object, that is, when the AC power supply is cut off, the detection data stored in the volatile memory is saved to the non-volatile memory in order to avoid the disappearance of the data just obtained. action device.

[0039] [Principle of the present invention]

[0040] When the supply of the ...

no. 2 Embodiment approach

[0098] Next, refer to Figure 7 A power monitoring device 10 according to a second embodiment of the present invention will be described. Figure 7 It is a block diagram showing the configuration of the power monitoring device of the second embodiment.

[0099] In the first embodiment, a case was described in which the state of the voltage level E of the AC power supply is determined based on the time width Wd measured from the pulse length of the detection signal Sd. In this embodiment, a case will be described in which the calculation circuit 13D added to the control circuit 13 calculates the voltage level Ed from the time width Wd, and determines the state of the voltage level E of the AC power supply based on the obtained voltage level Ed. Hereinafter, it refers to a voltage level calculated from the time width Wd detected at an arbitrary timing among the voltage level E of the AC power supply supplied from the outside, but both represent the same voltage level, and E is ...

no. 3 Embodiment approach

[0134] Next, refer to Figure 12 A facility 20A of a third embodiment of the present invention will be described. Figure 12 It is a block diagram showing the configuration of the device of the third embodiment.

[0135] In this embodiment, the case where the above-mentioned power supply monitoring device 10 is mounted inside the equipment 20A will be described.

[0136] Such as Figure 12 As shown, the device 20A of this embodiment includes a power supply circuit 21 , an operating circuit 22 , and a monitoring circuit 10A as main circuit configurations.

[0137] [Power circuit]

[0138] The power supply circuit 21 generates operating power PM and monitoring power PC composed of a DC voltage from an externally supplied AC power supply, and supplies them to the operating circuit 22 and the monitoring circuit 10A, respectively.

[0139] [action circuit]

[0140] The operating circuit 22 is configured to operate with the operating power PM supplied from the power supply circ...

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PUM

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Abstract

The invention provides a power supply monitoring device, equipment and an electromagnetic flow meter, and provides a power supply monitoring technology for determining the state of the voltage level of an AC power supply. A detection circuit (11) outputs a detection signal (Sd) indicating a detection period during which an AC waveform voltage (Vd) detected from a supplied AC power supply changes from a threshold value (Vth1) to a threshold value (Vth2), a measurement circuit (13A) measures a time width (Wd) of the detection period on the basis of the detection signal (Sd), a comparison circuit (13B) compares the time width (Wd) with a threshold value (Wth), and an output circuit (13C) outputs the state of the voltage level (E) of the AC power supply on the basis of the comparison result.

Description

technical field [0001] The present invention relates to a power monitoring technique for monitoring the voltage level of an AC power source. Background technique [0002] Generally, devices such as electromagnetic flowmeters and pressure measuring devices used as industrial field devices have a power supply circuit that generates a DC voltage from an external AC power supply, and the CPU executes the operation by supplying the obtained DC voltage as an operating power supply. Various processing actions. For example, an electromagnetic flowmeter that measures the flow rate of a fluid calculates physical quantities such as flow velocity and flow rate through the CPU based on the signal detected from the fluid flowing in the measuring tube, and sends the detected data to a higher-level device such as a controller. [0003] However, depending on the environment in which the equipment is installed, the function and performance of the product may be affected by the instability of...

Claims

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Application Information

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IPC IPC(8): G01F1/60
CPCG01F1/60
Inventor 鸣海启介
Owner YAMATAKE HONEYWELL CO LTD