Temperature-compensation switching value signal processing method
A technology of switching signal and processing method, which is applied in the direction of voltage/temperature change compensation, reliability improvement and modification, etc. It can solve the problems of insufficient temperature compensation and inconsistency, and achieve the effects of high compatibility, wide application and high compensation accuracy
Active Publication Date: 2018-05-25
INTEGRATED ELECTRONICS SYST LAB
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Problems solved by technology
[0006] In order to fundamentally solve the problem of insufficient temperature compensation and inconsistency, the present invention proposes a temperature self-compensating switch signal processing method, which can fundamentally compensate the change of operating voltage caused by temperature influence, does not occupy the AD channel, and Satisfy the operating range of 55%-70% input voltage
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[0028] A temperature self-compensating switching value signal processing method of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0029] A temperature self-compensating switch signal processing method, such as figure 1 shown, including the following steps:
[0030] Step 1. First, according to a batch of optocouplers, obtain the current transfer ratio CTR data of its ambient temperature Ta=25°C, and draw image 3 In the current transfer ratio CTR-temperature characteristic curve, curve 1 and curve 2 are the limit curves of the current transfer ratio CTR data distribution, and the current transfer ratio CTR distribution area of this batch of optocouplers is determined by the cross wrapping area of these two curves;
[0031] Step 2. According to the principle of sharing the current transfer ratio CTR distribution area, obtain Figure 4 The fitted target curve in ;
[0032] Step 3, us...
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Provided is a temperature-compensation switching value signal processing method. The input end of a luminescent tube of an optocoupler in a switching value signal processing device is connected to a temperature compensation fitting resistance array composed of a linear PTC and a linear NTC, designed through the statistical theory according to the batch optocoupler CTR characteristic curve, the characteristic curve of the overall resistance value changing with temperature has the similar rule with the characteristic curve of the optocoupler CTR changing with temperature, and effective and automatic compensation can be made for changes of output voltage caused by temperature change influence in the optocoupler full-operating temperature range. The output end of an optocoupler triode is connected to an adjustment fitting resistance array composed of a non-linear PTC or NTC and a linear PTC or NTC, and specific adjustment is made on the situation that the temperature characteristic curve of an individual batch optocoupler CTR has an obvious inflection point. Compensation can be made fundamentally for changes of operation voltage caused by compensation temperature influence, no AD channel is occupied, and the operation range of 55-70% of the output voltage is met.
Description
technical field [0001] The invention relates to a processing method of a switch signal and various devices using the method, and is suitable for protection control and automation devices requiring switch signal collection in an electric power automation system. Background technique [0002] In the power automation system, there are auxiliary contacts in the form of switches such as circuit breakers, isolating switches, and load switches. These switches are usually in high-voltage circuits and are also in a working environment with strong electromagnetic interference. . For these reasons, the usual processing of digital input is to first use the optocoupler isolation method for isolation processing and then collect the signal. The protection control and automation devices in the power automation system generally meet the requirements of 55%-70% of the operating range. The traditional method is based on the variation range of the temperature characteristic parameters of the o...
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Login to View More IPC IPC(8): H03K19/003
CPCH03K19/00369
Inventor 许保落郝磊田东顺丛春涛周文俊
Owner INTEGRATED ELECTRONICS SYST LAB