Intelligent voltage discriminator for multiple voltage sources

Abstract

The invention relates to a voltage discriminator comprising three inputs, one of which is used for a common signal and the other two inputs are used for a signal to be discriminated, each of the three signals being input to a three-phase rectifier bridge, a measurement signal being acquired from the signal to be discriminated by means of a high-impedance measurement resistor, high impedance measurement resistors allow very low current to pass through, where each high impedance resistor is connected in series with an offset signal generator and its output is compared in comparators with another signal having no any reduction in value, where the output of each comparator is a logical value "1" or "0", respectively, if the value is greater or not greater than a threshold value. The discriminator is suitable for multiple voltage sources, the discriminator can automatically adapt to the input voltage, and the discriminator is low in energy consumption, very simple and high in functionality.

Description

Technical Field

[0001] The subject matter of the invention relates to an intelligent voltage discriminator for multiple voltage sources having characteristics that can adapt to the input voltage.

[0002] The invention is characterized by the special design and configuration of each element used in such a way as to achieve a highly functional, simple and energy-efficient discriminator.

[0003] The invention therefore belongs to the field of devices for voltage discrimination. Background Art

[0004] In the prior art, when several cables are extended in parallel, especially in the case of long distances of several hundred meters, the fact is that in some cables, although they do not have any voltage, voltage will be induced due to coupling and / or due to poor cable quality, which will generate error signals, which are the source of erroneous operation, so it is necessary to be able to identify which voltage passing through the cable is a good signal.

[0005] In the prior art, such signal discrimination is performed by optocouplers and resistors. Although this is a possible way to achieve signal discrimination, this embodiment has significant energy consumption problems because energy is constantly consumed and there are even situations where the correct input cannot be discriminated.

[0006] In addition, the discriminator must be suitable for a multi-voltage source with a high voltage range, which may be 24 V to 240 V. Therefore, the discriminator must be designed to be able to adapt to the input voltage.

[0007] Discriminators that can adapt to the input voltage are not known in the prior art.

[0008] The subject of the invention is therefore to develop a voltage discriminator suitable for multiple voltage sources, wherein the discriminator itself can automatically adapt to the input voltage, wherein the discriminator also has low energy consumption, is very simple and has high functionality, to develop a discriminator as described below, the essence of which is described in claim 1. Summary of the invention

[0009] The essence of the subject matter of the invention is stated in the independent claim, different embodiments are stated in the dependent claims.

[0010] The subject of the invention relates to an intelligent voltage discriminator for a multi-voltage source, said multi-voltage source comprising a series of input terminals, preferably three input terminals, one of which is for a common signal and the other two are signals to be discriminated, each of the three signals being input to a three-phase rectifier bridge, wherein a measurement signal is obtained from the signal to be discriminated by means of a high-impedance measuring resistor, the high-impedance measuring resistor allowing a very low current to pass, each high-impedance resistor being connected in series with an offset signal generator and its output being compared in a comparator with another signal without any reduction in value, wherein the output of each comparator is a logical value "1" or "0" if the value is greater or not greater than a threshold value, respectively.

[0011] Each generator of the offset signal of each signal to be identified includes a voltage source that generates a voltage offset value, whose output terminal is connected to a resistor, and the entire voltage source and resistor assembly is connected in parallel with a capacitor, and the reduced signal of the signal to be analyzed is taken out from the connection point between the voltage source and the resistor and sent to the comparator.

[0012] The capacitor has the function of filtering and comparing with the average magnitude of the input signal rather than the approximate value of the peak voltage. The average voltage provided by the capacitor is more reliable than the peak voltage.

[0013] The discriminator includes two comparators, a first comparator and a second comparator, wherein in the first comparator, the first signal without any offset is compared with the second signal to which an offset has been applied, and in the second comparator, the second signal without any offset is compared with the first signal to which an offset has been applied.

[0014] The output of each comparator is a logic signal "1" or "0" depending on whether the difference value of the comparator is greater than a preset threshold value, thereby discarding the output of the comparator providing the value "0".

[0015] Unless otherwise indicated, all technical and scientific elements used in this specification have the meanings commonly understood by those skilled in the art to which the invention belongs. When the present invention is put into practice, methods and materials similar or equivalent to those described in the specification can be used.

[0016] Throughout the specification and claims, the word "comprise" and its variants are not intended to exclude other technical features, additives, components or steps. For those skilled in the art, other themes, advantages and features of the present invention will be inferred in part from the description and in part from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to supplement the description made and to help better understand the characteristics of the invention according to a preferred practical embodiment of the invention, a set of drawings are attached as an integral part of the description, in which the following are shown in an illustrative and non-limiting way.

[0018] Figure 1 A circuit diagram illustration of the discriminator subject of the present invention is shown. DETAILED DESCRIPTION

[0019] from Figure 1 It can be observed that the discriminator subject of the invention comprises a series of input terminals 1, 2 and 3 corresponding respectively to the signal (COMMON), the signal A and the signal B, the purpose of which is to be able to discriminate whether one of the signals is an incorrect signal, despite having a certain voltage.

[0020] The voltage in one of the cables could be the result of excessive noise, excessive length, or a combination of factors, so it is necessary to be able to identify whether the voltage shown in one of the cables is a valid voltage.

[0021] This has important practical effects, especially for valve command signals and the like.

[0022] The signals (COMMON), A and B are sent to the rectifier bridge 4, where the feed signal is obtained.

[0023] Signals A and B are signals to be identified. Before the input end of the bridge rectifier, a connecting cable is led out, on which a high-impedance measuring resistor 5 is arranged, followed by an offset signal generator, and the output end of the offset signal generator is connected to the comparator.

[0024] Each offset signal generator of signal A and signal B includes a voltage source 6 for generating a voltage offset value, whose output end is connected to a resistor 8, and the entire voltage source 6 and resistor 8 assembly is connected in parallel with a capacitor 7. A reduced signal 10 of the signal to be analyzed is taken out from the connection point between the voltage source 6 and the resistor 8 and sent to comparators 9 and 10.

[0025] The discriminator includes a first comparator 9 and a second comparator 10, wherein a signal A without any offset and a signal B to which an offset has been applied reach the first comparator 9 for comparison, and a signal B without any offset and a signal A to which an offset has been applied reach the second comparator for comparison.

[0026] The discriminator truth table is as follows:

[0027] Thus, it can be observed that, for example, when signal A is greater than signal B to which an 8 volt offset has been applied, a "1" is generated in comparator 9, and when signal B is greater than signal A offset by said 8 volts, a "0" is generated, or in other cases a "1" is generated, while in comparator 10, for example, when voltage A is greater than signal B offset by more than 8 volts, a value "0" is generated, and when signal B is greater than signal (A) offset by said 8 volts, a "1" is generated, or in other cases a "1" is generated.

[0028] It can also be observed from the table that when the two signals are less than 8V apart, the discriminator is able to identify them as valid signals.

[0029] This enables signals which are caused by noise or induction due to excessive parallel lengths of other cables to be distinguished, wherein the distinction is performed in a simple and efficient manner with energy saving.

[0030] Having fully described the nature of the invention and how to put it into practice, it should be stated that within the essential scope of the invention, the invention can be implemented in other embodiments that differ in details from the embodiments indicated by example, and the scope of protection claimed also covers these embodiments as long as they do not change, vary or modify the basic principles of the invention.

Claims

1. An intelligent voltage discriminator for multiple voltage sources, characterized in that: It comprises a series of input terminals (1), (2) and (3), one of which is for a common signal (COMMON) and the other two are signals to be identified, signal (A) and signal (B), each of which is input to a three-phase rectifier bridge (4), wherein a measurement signal is obtained from the signal to be identified by means of a high-impedance measuring resistor (5), which is connected in series with an offset signal generator and whose output is compared in a comparator with another signal without any reduction in value, wherein the output of each comparator is a logical value "1" or "0" if the value is greater or less than a threshold value, respectively.

2. The intelligent voltage discriminator for multiple voltage sources according to claim 1, characterized in that: Each generator of the offset signal of each signal to be identified includes a voltage source (6) for generating a voltage offset value, the output end of the voltage source is connected to a resistor (8), the entire voltage source (6) and resistor (8) assembly is connected in parallel with a capacitor (7), and the reduced signal of the signal to be analyzed is taken out from the connection point between the voltage source (6) and the resistor (8) and sent to comparators (9), (10).

3. The intelligent voltage discriminator for multiple voltage sources according to claim 1, characterized in that: The discriminator includes two comparators, a first comparator (9) and a second comparator (10), wherein in the first comparator (9), the first signal (A) without any offset is compared with the second signal to which an offset has been applied, and in the second comparator (10), the second signal (B) without any offset is compared with the first signal to which an offset has been applied.

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