Voltage detecting device
A technology of voltage detection and voltage difference, which is applied in the field of voltage detection devices, can solve problems such as low voltage accuracy, difficulty in improving accuracy, and complex circuit implementation, and achieve the effects of voltage detection, automatic seamless switching, and improved accuracy
Inactive Publication Date: 2013-01-30
SUNGROW POWER SUPPLY CO LTD
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[0004] However, for the existing segmented voltage sampling method, multiple signal channels need to be set, and its circuit implementation is complicated. In addition, different signal channels will have different errors and temperature drifts, making it difficult to improve the sampling accuracy, resulting in voltage The detection accuracy is low
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[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0033] The invention discloses a voltage detection device, which has simple structure and high detection accuracy.
[0034] see figure 1 , figure 1 It is a structural schematic diagram of a voltage detection device disclosed in the present invention. The voltage detection device includes: a positive access node IN+, a negative access node IN-, a sampling resistor, an optional voltage dividing resistor, a switching control unit, a signal condi...
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The invention discloses a voltage detecting device. A sampling resistor and a selective divider resistor are serially connected between a positive input end and a passive input end; switching control circuits are connected with the two ends of the selective divider resistor; the selective divider resistor can be switched off or switched on by the switching control circuit according to the voltage value of a to-be-detected electronic circuit; a corresponding voltage multiplying power is confirmed according to the state information of the selective divider resistor; and the voltage value of the to-be-detected electronic circuit is calculated according to the voltage value and the voltage multiplying power of the two ends of the sampling resistor. According to the voltage detecting device, the scope of output voltage on the sampling resistor can be changed by controlling the number of the selective divider resistors connected in the circuit for realizing wide-range voltage detection; and the automatic seamless switch of the output sampling voltage is realized; and meanwhile, the circuit structure is simplified, and the sampling accuracy is improved due to that a plurality of signal channels are saved; and consequently, the voltage detecting accuracy is improved.
Description
technical field [0001] The invention belongs to the technical field of voltage detection, and in particular relates to a voltage detection device. Background technique [0002] The electronic circuit voltage usually has a large amplitude difference, so the corresponding detection equipment or instrument should have a large range. [0003] At present, the segmented voltage sampling method is mostly used to realize large-scale voltage detection. Specifically: detect the voltage input range of the AD sampling chip, and select the corresponding signal channel according to the voltage input range (different signal channels have different transformation ratios), and adjust the voltage range entering the AD sampling chip by selecting the signal channel. To achieve a large range of voltage detection. [0004] However, for the existing segmented voltage sampling method, multiple signal channels need to be set, and its circuit implementation is complicated. In addition, different si...
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Inventor 李俊范纯浆陶磊倪华钱永恒孙龙林
Owner SUNGROW POWER SUPPLY CO LTD