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Digital electric meter capable of dynamically compensating and correcting reading

A dynamic compensation, digital meter technology, applied in the direction of measuring electrical variables, measuring devices, instruments, etc., can solve problems such as deviation

Inactive Publication Date: 2011-03-23
CHANG SHUAN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the location of the digital meter is different, and different locations have different ambient temperature and temperature changes. In this case, even if a small fixed voltage is added, it cannot cope with different degrees of deviation caused by different ambient temperatures.

Method used

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  • Digital electric meter capable of dynamically compensating and correcting reading
  • Digital electric meter capable of dynamically compensating and correcting reading
  • Digital electric meter capable of dynamically compensating and correcting reading

Examples

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Embodiment Construction

[0027] Regarding one of the preferred embodiments of the present invention, please refer to figure 1 Shown, mainly be provided with a display 11 on the output end of a microprocessor 10, and the input end of microprocessor 10 is provided with an analog-to-digital converter 12, and through this analog-to-digital converter 12 and an OP amplifier 13 The output terminal of the OP amplifier 13 has a positive terminal input and a negative terminal input. In this embodiment, its positive terminal input is connected to a detector 14 to obtain an analog detection signal.

[0028] The main technical feature of the present invention is that a dynamic compensation unit 20 is provided on the positive terminal input of the aforementioned OP amplifier 13, so as to dynamically apply different voltages at the positive terminal input of the OP amplifier 13, so as to address the offset caused by temperature variation The phenomenon is compensated and corrected.

[0029] In this embodiment, the...

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Abstract

The invention relates to a digital electric meter capable of dynamically compensating and correcting reading. The digital electric meter comprises an OP amplifier, an analog-digital converter, a microprocessor and a display; wherein the input terminal of the OP amplifier is provided with a detector, and the input terminal is further provided with a dynamic compensating unit, the dynamic compensating unit can generate different bias voltage values along with ambient temperature variation, and the bias voltage value is dynamically applied onto the input terminal of the OP amplifier, thus compensating and correcting zero drift caused by the OP amplifier owning to ambient temperature variation, so that detection reading of the digital electric meter is not influenced by ambient temperature and is more accurate.

Description

【Technical field】 [0001] The invention relates to a digital electric meter capable of dynamically compensating and correcting readings, especially a digital electric meter that can effectively solve the problem of reading errors caused by the influence of ambient temperature. 【Background technique】 [0002] According to the circuit composition of the existing digital ammeter, it is roughly as follows figure 2 As shown, it includes a microprocessor 70, an OP amplifier 71, a detector 72, a display 73 and an analog-to-digital converter 74; wherein: [0003] This detector 72 is arranged on the input end of OP amplifier 71, and by OP amplifier 71, the detection signal of analog form sent by detector 72 is carried out signal amplification, and the output end of this OP amplifier 71 is then through analog-to-digital converter 74 and One input end of the microprocessor 70 is connected to convert the analog signal into a digital signal, and then send it to the microprocessor 70, and...

Claims

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Application Information

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IPC IPC(8): G01R35/04G01R22/10
Inventor 蒋健忠
Owner CHANG SHUAN ELECTRONICS
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