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Self-adapting type micro light detection device with high-sensitivity silicon optical diode

A silicon photodiode, high-sensitivity technology, applied in the field of self-adaptive high-sensitivity silicon photodiode low-light detection device, to achieve the effect of simple circuit composition

Inactive Publication Date: 2003-07-23
XIAMEN UNIV
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Problems solved by technology

The examples of on-site sampling and detection using detection instruments composed of photomultiplier tubes are only found in vehicle-mounted (or ship-borne) mobile detection systems, but it is not an on-site sampling and detection system in the actual sense, because it cannot be operated in unmanned and on-duty In the case of work, at the same time, the environment of the vehicle mobile detection system is simulated laboratory environmental conditions

Method used

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  • Self-adapting type micro light detection device with high-sensitivity silicon optical diode
  • Self-adapting type micro light detection device with high-sensitivity silicon optical diode
  • Self-adapting type micro light detection device with high-sensitivity silicon optical diode

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Embodiment Construction

[0021] The following embodiments will further illustrate the present invention in conjunction with the accompanying drawings.

[0022] In order to meet the requirements of on-site testing instruments, a silicon photodiode-based can be designed to be as low as 10 -8 Lx illuminance level of low light for detection of adaptive high-sensitivity silicon photodiode low light (10 -8 Lx level) detection system, the present invention adopts a zero adjustment principle that is completely different from general laboratory detection instruments in terms and methods (the zero adjustment principle of laboratory detection instruments is based on manual operation) to achieve the background ( Silicon photodiodes, integrated operational amplifiers and front-end circuits all cause the background of temperature drift to automatically limit. This new technology of real-time self-zeroing and automatically limiting the temperature drift background and time drift background, in conjunction with other tec...

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Abstract

Based on the silicon optical diode, the device can detect illuminance less than 10 to the power -8 Lx. The silicon optical diode and the magnetifier are installed in the electromagnetic shielding box. The output end of the magnetifier is connected to the input end of the voltage to frequency converter. The decimal data collector with at least 6 digits includes the collection counter, the collection register, the time base generator for the counting gate, the background counter, the background register as well as the OR gate and the full subtracter. The invention provides long-lasting steady work in bad environment, which does not affect the precision, long distance data transmissions well as mini type an low power consumption. The capabilities as of self-adapting and self-starting, satisfy the requirements of no-attendance.

Description

(1) Technical field [0001] The present invention relates to a signal detection device, in particular to a silicon photodiode that can compare less than 10 -8 An adaptive high-sensitivity silicon photodiode low-light detection device for low-light detection at Lx illuminance level. (2) Background technology [0002] Environmental science and environmental monitoring are a new field of scientific research. In the early days, the basic research methods that have been widely adopted and still used today are on-site sampling→samples sent to testing laboratories→testing samples with related testing instruments. The detection data obtained by this approach is a non-real-time result. At the same time, due to the time difference between sampling and detection and the difference between the sampling environment and the detection environment, some or even most of the information of the sample to be tested has been lost. The extreme case is that the information of the sample to be tested can...

Claims

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Application Information

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IPC IPC(8): G01J1/00G01J1/42
Inventor 陈进顺
Owner XIAMEN UNIV
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