CN210609120U - Voltage signal conversion circuit and voltage signal conversion board - Google Patents
Voltage signal conversion circuit and voltage signal conversion board Download PDFInfo
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- CN210609120U CN210609120U CN201922138881.4U CN201922138881U CN210609120U CN 210609120 U CN210609120 U CN 210609120U CN 201922138881 U CN201922138881 U CN 201922138881U CN 210609120 U CN210609120 U CN 210609120U
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Abstract
The utility model relates to a voltage signal converting circuit and voltage signal conversion board, wherein this circuit includes: a first signal input terminal; a second signal input terminal; a safe ground end; the first end of the high-speed optocoupler is connected to the first signal input end, the second end of the high-speed optocoupler is connected to the safe ground end, the third end of the high-speed optocoupler is connected to the second signal input end, and the fourth end of the high-speed optocoupler is connected to the safe ground end through the first resistor and the second resistor; and the negative end of the high-speed comparator is connected to the fourth end of the high-speed optocoupler through the first resistor, the positive end of the high-speed comparator is connected to the second signal input end through the third resistor and the fourth resistor, and the output end of the high-speed comparator is connected to the signal output end. The embodiment of the utility model discloses an effectual high-speed signal transmission's between the different voltages problem of having solved, low cost, simple structure are suitable for extensive using widely.
Description
Technical Field
The utility model relates to a high-speed signal technical field. The utility model discloses further relate to a voltage signal converting circuit and voltage signal conversion board.
Background
Under the conditions of 'industry 4.0' proposed in Germany, 'Internet +' proposed in America and 'China manufacturing 2025' proposed in China, various industries enter a digital era, traditional industrial manufacturing is changed into intelligent manufacturing, and a large amount of manual operation is replaced by intelligent robots and mechanical hands. The conversion improves the working efficiency on one hand and improves the production quality and the product percent of pass on the other hand. On the basis of such a large background, the generation of smart devices, industrial robots and the like is also accelerating. The signal transmission among various voltages is increased, most of the common electrical control components (relays and the like) are DC24V, and most of the data acquisition cards are DC3.3V. Therefore, devices with different voltages cannot be directly connected, devices with high voltage cannot be driven by low voltage, and devices with low voltage can be burnt out by low voltage. The traditional integration is usually realized by adding a voltage transformation device or a complex voltage transformation circuit between different types of devices. These methods still have some disadvantages, such as high cost, high quality loss of signal during transformation, poor interference resistance, etc. The problems of large quality loss and poor anti-interference performance of signals are particularly prominent in the transmission process of high-speed signals.
Therefore, in order to solve the above-mentioned defects in the prior art, a method for transmitting high-speed signals between different voltages needs to be provided, the transmission of signals of different voltages is completed through a simple and easily constructed conversion circuit and a conversion board, the anti-interference capability of high-speed signal transmission is improved, and the accuracy of signal transmission is ensured.
SUMMERY OF THE UTILITY MODEL
In one aspect, the present invention provides a voltage signal converting circuit based on the above object, wherein the circuit includes:
a first signal input terminal;
a second signal input terminal;
a safe ground end;
the first end of the high-speed optocoupler is connected to the first signal input end, the second end of the high-speed optocoupler is connected to the safe ground end, the third end of the high-speed optocoupler is connected to the second signal input end, and the fourth end of the high-speed optocoupler is connected to the safe ground end through the first resistor and the second resistor;
and the negative end of the high-speed comparator is connected to the fourth end of the high-speed optocoupler through the first resistor, the positive end of the high-speed comparator is connected to the second signal input end through the third resistor and the fourth resistor, and the output end of the high-speed comparator is connected to the signal output end.
According to the utility model discloses a voltage signal converting circuit's embodiment, wherein the circuit further includes:
and the anode of the light-emitting diode is connected to the second signal input end, and the cathode of the light-emitting diode is connected to the output end of the high-speed comparator.
According to the utility model discloses a voltage signal converting circuit's embodiment, wherein high-speed comparator's high level end is connected to second signal input part, and high-speed comparator's low level end is connected to safe ground.
According to the utility model discloses a voltage signal converting circuit's embodiment, wherein the circuit further includes:
and the first voltage-stabilizing tube is connected between the first signal input end and the first end of the high-speed optocoupler in series.
According to the utility model discloses a voltage signal converting circuit's embodiment, wherein the circuit further includes:
and the first end of the second voltage-stabilizing tube is connected to a safe ground end, and the second end of the second voltage-stabilizing tube is connected to the second signal input end through a third resistor.
According to the utility model discloses a voltage signal converting circuit's embodiment, wherein the circuit further includes:
and the first filter capacitor is connected with the second resistor in parallel.
According to the utility model discloses a voltage signal converting circuit's embodiment, wherein the circuit further includes:
and the second filter capacitor is connected with the second voltage-regulator tube in parallel.
According to the utility model discloses a voltage signal converting circuit's embodiment, wherein the circuit further includes:
a first end of the third filter capacitor is connected to the high-level end of the high-speed comparator, and a second end of the third filter capacitor is connected to the safety ground end; and
and the fourth filter capacitor is connected with the third filter capacitor in parallel.
According to the utility model discloses a voltage signal converting circuit's embodiment, wherein first signal input part's rated input voltage is greater than second signal input part's rated input voltage.
On the other hand, the utility model also provides a voltage signal conversion board, wherein this voltage signal conversion board includes the voltage signal conversion circuit of any preceding embodiment.
Adopt above-mentioned technical scheme, the utility model discloses following beneficial effect has at least: the high-speed optical coupler can well improve the anti-interference capacity of high-speed signal transmission, the high-speed comparator can rapidly process the incoming high-speed signals and compare the voltage levels of the positive end and the negative end to output corresponding level signals, the problem of high-speed signal transmission between different voltages is effectively solved, and the high-speed optical coupler is low in cost, simple in structure and suitable for large-scale popularization and use.
The utility model provides an aspect of embodiment should not be used for the restriction the utility model discloses a protection scope. Other embodiments are contemplated in accordance with the techniques described herein, as will be apparent to one of ordinary skill in the art upon study of the following figures and detailed description, and are intended to be included within the scope of the present application.
Embodiments of the invention are explained and described in more detail below with reference to the drawings, but they should not be construed as limiting the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the description of the prior art and the embodiments will be briefly described below, parts in the drawings are not necessarily drawn to scale, and related elements may be omitted, or in some cases the scale may have been exaggerated in order to emphasize and clearly show the novel features described herein. In addition, the structural order may be arranged differently, as is known in the art.
Fig. 1 shows a schematic diagram of an embodiment of a voltage signal conversion circuit according to the present invention;
fig. 2 shows a schematic diagram of a further embodiment of a voltage signal conversion circuit according to the present invention.
Detailed Description
While the present invention may be embodied in various forms, there is shown in the drawings and will hereinafter be described some exemplary and non-limiting embodiments, with the understanding that the present disclosure is to be considered an exemplification of the invention and is not intended to limit the invention to the specific embodiments illustrated.
Fig. 1 shows a schematic diagram of an embodiment of a voltage signal conversion circuit according to the present invention. As shown, IN the embodiment of the voltage signal conversion circuit of the present invention, the circuit 100 at least includes a first signal input terminal 11(IN0), a second signal input terminal 12(MCU), and a safety ground terminal 13(GND and COM); the high-speed optical coupler 20(U1), a first end 21 (U11) of the high-speed optical coupler 20 is connected to the first signal input end 11, a second end 22 (U12) of the high-speed optical coupler 20 is connected to the safe ground end 13, a third end 13 (U13) of the high-speed optical coupler 20 is connected to the second signal input end 12, and a fourth end 24(U14) of the high-speed optical coupler 20 is connected to the safe ground end 13 through a first resistor 41(R1) and a second resistor 42 (R2); a high-speed comparator 30(U2A), a negative terminal 31(U2A 4) of the high-speed comparator 30 is connected to the fourth terminal 24 of the high-speed optocoupler 20 through a first resistor 41, a positive terminal 32(U2A5) of the high-speed comparator 30 is connected to the second signal input terminal 12 through a third resistor 43(R3) and a fourth resistor 44(R4), and an output terminal 33 of the high-speed comparator 30 is connected to the signal output terminal 14(DI _ 0).
Taking the electrical control components (such as a relay) and the data acquisition card as examples, the DC24V high-speed signal of the electrical control components needs to be converted into DC3.3V that the data acquisition card can receive, so the input end needs to be connected with the components of direct current 24V, and the output end outputs direct current 3.3V for driving the data acquisition card of direct current 3.3V to work. Each path of input signal and output signal has two lines, one is a signal line and the other is a ground line, and the grounds of the two lines are the same ground. Utilize the embodiment of the utility model discloses a circuit carries out the high-speed signal transmission between the different voltages, at first signal input part 11(IN0) input electrical control components and parts's high-speed signal, secondly second signal input part 12(MCU) connects a DC3.3V power to be connected with data acquisition card at signal output part 14(DI _0), this data acquisition card can read signal output part's high-low level through host computer or software program. High-speed opto-coupler 20(U1) mainly plays the effect of isolation signal, improve the interference killing feature, when the first end 21 (U11) of high-speed opto-coupler 20(U1) flows IN direct current 24V voltage from first signal input part 11(IN0), the inside emitting diode of high-speed opto-coupler 20 is luminous can send optical signal, this optical signal can be detected by inside photosensitive element, make the circuit between the third end 13 (U13) and the fourth end 24(U14) of high-speed opto-coupler 20 switch on, finally realize the signal transmission of "electricity-light-electricity" form. The third end 13 (U13) of the high-speed optical coupler 20 is connected with a power supply which inputs direct current 3.3V from the second signal input end 12(MCU), when a circuit between the third end 13 (U13) and the fourth end 24(U14) of the high-speed optical coupler 20 is conducted, the high-speed optical coupler 20 can be connected with the direct current 3.3V power supply of the second signal input end 12(MCU), the first resistor 41(R1), and the second resistor 42(R2) to a passage between the safety ground end 13 (GND). The first resistor 41(R1) and the second resistor 42(R2) perform a voltage division function, and simultaneously, when the third terminal 13 (U13) and the fourth terminal 24(U14) of the high-speed optocoupler 20 are not conducted, a low level state is maintained, so that misoperation is prevented. The high speed comparator 30(U2A) has a positive terminal 32(U2a5) and a negative terminal 31(U2A 4), when no dc24V voltage signal is input to the first signal input terminal 11(IN0), the negative terminal 31 of the high speed comparator 30 has no voltage, resulting IN the voltage value of the negative terminal 31 being lower than that of the positive terminal 32, so that a high level is output at the signal output terminal 14(DI _0) of the whole circuit; when the first signal input terminal 11(IN0) receives the 24V signal, the voltage at the inverting terminal 31 is higher than the voltage at the forward terminal 32, and the signal output terminal 14(DI _0) outputs a low level. When the data acquisition card connected to the signal output end 14(DI _0) reads the high-low level of the signal output end 14(DI _0) through an upper computer or a software program, if the high-low level is detected, the high-speed signal of the electrical control component is low level; if the detection is low, it indicates that the high-speed signal of the electrical control component is high (DC 24V).
In addition, it should be noted that in selecting the high-speed opto-coupler 20 and the high-speed comparator 30, attention is paid to the speed. If the acquisition speed is not high enough, the signals are incomplete, and data parts are lost. For example, when a high-speed pulse signal is acquired, corresponding data can be calculated through the number of pulses, once the number of pulses is wrong, the subsequent data are all wrong, and the speed of the high-speed optical coupler 20 and the high-speed comparator 30 is higher than the speed acquired by a pulse instrument.
In addition, it should be noted that the selection of the resistances of the first resistor 41(R1), the second resistor 42(R2), the third resistor 43(R3), and the fourth resistor 44(R4) should satisfy that, when the circuit between the third terminal 13 (U13) and the fourth terminal 24(U14) of the high-speed optocoupler 20 is turned on through the voltage division of the first resistor 41(R1), the second resistor 42(R2), the third resistor 43(R3), and the fourth resistor 44(R4), the voltage of the reverse terminal 31 of the high-speed comparator 30 is higher than the voltage of the forward terminal 32. The resistance value should be selected and adjusted accordingly for different voltage conversion conditions. For example, in the aforementioned example of converting the DC24V high-speed signal of the electrical control component into DC3.3V that can be received by the data acquisition card, preferably, but not limited to, the resistances of the first resistor 41(R1) and the second resistor 42(R2) may be selected to be 10K, and the resistances of the third resistor 43(R3) and the fourth resistor 44(R4) may be selected to be 1K, so as to implement the voltage conversion function of the above circuit. IN some embodiments, the nominal input voltage of the first signal input terminal 11(IN0) is greater than the nominal input voltage of the second signal input terminal 12 (MCU).
Fig. 2 shows a schematic diagram of a further embodiment of a voltage signal conversion circuit according to the present invention. A further embodiment of the invention will be described below with reference to fig. 2.
In some embodiments of the voltage signal converting circuit of the present invention, the circuit 100 further comprises: and the anode of the light emitting diode 50 is connected to the second signal input end 12, and the cathode of the light emitting diode 50 is connected to the output end 33 of the high-speed comparator 30. When the first signal input terminal 11(IN0) receives the 24V voltage signal, the voltage at the reverse terminal 31 of the high speed comparator 30 is higher than the voltage at the forward terminal 32, and the output terminal 33 of the high speed comparator 30 outputs a low level, so that the voltage at the positive electrode of the light emitting diode 50 is higher than the voltage at the negative electrode to light the light emitting diode 50. On the contrary, when no voltage signal is inputted to the first signal input terminal 11(IN0), the output terminal 33 of the high speed comparator 30 outputs a high level, and the light emitting diode 50 is not lit. The light emitting diode 50 can provide monitoring data receiving and transmitting states at any time and provide convenience for detecting and maintaining the circuit.
In some embodiments of the voltage signal converting circuit of the present invention, the high-level terminal 34 of the high-speed comparator 30 is connected to the second signal input terminal 12, and the low-level terminal 35 of the high-speed comparator 30 is connected to the safety ground terminal 13. The power supply of the second signal input terminal 12 supplies the high-speed comparator 30 on the one hand, and the voltage of the second signal input terminal 12 and the safety ground terminal 13 provide the output 33 of the high-speed comparator 30 with the output level.
In some embodiments of the present invention, the circuit 100 further comprises a first voltage regulator tube 61, and the first voltage regulator tube 61 is connected in series between the first signal input terminal 11 and the first end of the high-speed optical coupler 20. The function of the first zener 61 is to prevent the voltage at the first signal input terminal 11 from being too high and breaking down the circuit. In some embodiments, circuit 100 further includes a second regulator 62, a first terminal of second regulator 62 being connected to safe terminal 13, and a second terminal of second regulator 62 being connected to second signal input terminal 12 via a third resistor 43. Similarly, the second regulator 62 also functions as a voltage regulator to prevent breakdown of the second signal input terminal 11 due to excessive voltage.
In some embodiments of the voltage signal converting circuit of the present invention, the circuit 100 further comprises a first filter capacitor 71, and the first filter capacitor 71 is connected in parallel with the second resistor 42. In some embodiments, the circuit 100 further includes a second filter capacitor 72, the second filter capacitor 72 being connected in parallel with the second regulator 62. In some embodiments, the circuit 100 further includes a third filter capacitor 73 and a fourth filter capacitor 74, a first terminal of the third filter capacitor 73 is connected to the high-level terminal 34 of the high-speed comparator 30, and a second terminal of the third filter capacitor 73 is connected to the safety ground terminal 13; the fourth filter capacitor 74 is connected in parallel with the third filter capacitor 73. The first filter capacitor 71, the second filter capacitor 72, the third filter capacitor 73 and the fourth filter capacitor 74 perform the filtering function at different positions of the circuit.
On the other hand, the utility model also provides a voltage signal conversion board, wherein this voltage signal conversion board includes the voltage signal conversion circuit of any preceding embodiment.
Adopt above-mentioned technical scheme, the utility model discloses following beneficial effect has at least: the high-speed optical coupler can well improve the anti-interference capacity of high-speed signal transmission, the high-speed comparator can rapidly process the incoming high-speed signals and compare the voltage levels of the positive end and the negative end to output corresponding level signals, the problem of high-speed signal transmission between different voltages is effectively solved, and the high-speed optical coupler is low in cost, simple in structure and suitable for large-scale popularization and use.
It is to be understood that the features listed above for the different embodiments may be combined with each other, where technically feasible, to form further embodiments within the scope of the invention. Furthermore, the specific examples and embodiments described herein are non-limiting, and various modifications may be made in the structure, steps, and sequence set forth above without departing from the scope of the present invention.
In this application, the use of the conjunction of the contrary intention is intended to include the conjunction. The use of definite or indefinite articles is not intended to indicate cardinality. In particular, references to "the" object or "an" and "an" object are intended to mean one of many such objects possible. However, although elements disclosed in the embodiments of the present invention may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated. Furthermore, the conjunction "or" may be used to convey simultaneous features, rather than mutually exclusive schemes. In other words, the conjunction "or" should be understood to include "and/or". The term "comprising" is inclusive and has the same scope as "comprising".
The above-described embodiments, particularly any "preferred" embodiments, are possible examples of implementations, and are presented merely for a clear understanding of the principles of the invention. Many variations and modifications may be made to the above-described embodiments without departing substantially from the spirit and principles of the technology described herein. All such modifications are intended to be included within the scope of this disclosure.
Claims (10)
1. A voltage signal conversion circuit, the circuit comprising:
a first signal input terminal;
a second signal input terminal;
a safe ground end;
a first end of the high-speed optical coupler is connected to the first signal input end, a second end of the high-speed optical coupler is connected to the safety ground end, a third end of the high-speed optical coupler is connected to the second signal input end, and a fourth end of the high-speed optical coupler is connected to the safety ground end through a first resistor and a second resistor;
and the negative end of the high-speed comparator is connected to the fourth end of the high-speed optocoupler through the first resistor, the positive end of the high-speed comparator is connected to the second signal input end through the third resistor and the fourth resistor, and the output end of the high-speed comparator is connected to the signal output end.
2. The circuit of claim 1, further comprising:
and the anode of the light-emitting diode is connected to the second signal input end, and the cathode of the light-emitting diode is connected to the output end of the high-speed comparator.
3. The circuit of claim 1, wherein a high-level terminal of the high-speed comparator is connected to the second signal input terminal, and a low-level terminal of the high-speed comparator is connected to the safety ground terminal.
4. The circuit of claim 1, further comprising:
and the first voltage-stabilizing tube is connected between the first signal input end and the first end of the high-speed optocoupler in series.
5. The circuit of claim 1, further comprising:
and the first end of the second voltage-stabilizing tube is connected to the safe ground end, and the second end of the second voltage-stabilizing tube is connected to the second signal input end through the third resistor.
6. The circuit of claim 1, further comprising:
the first filter capacitor is connected with the second resistor in parallel.
7. The circuit of claim 5, further comprising:
and the second filter capacitor is connected with the second voltage-regulator tube in parallel.
8. The circuit of claim 3, further comprising:
a third filter capacitor, wherein a first end of the third filter capacitor is connected to a high-level end of the high-speed comparator, and a second end of the third filter capacitor is connected to the safety ground end; and
a fourth filter capacitor connected in parallel with the third filter capacitor.
9. The circuit of claim 1, wherein a nominal input voltage of the first signal input terminal is greater than a nominal input voltage of the second signal input terminal.
10. A voltage signal conversion board, characterized in that it comprises a voltage signal conversion circuit according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922138881.4U CN210609120U (en) | 2019-11-29 | 2019-11-29 | Voltage signal conversion circuit and voltage signal conversion board |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922138881.4U CN210609120U (en) | 2019-11-29 | 2019-11-29 | Voltage signal conversion circuit and voltage signal conversion board |
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| CN210609120U true CN210609120U (en) | 2020-05-22 |
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| CN201922138881.4U Active CN210609120U (en) | 2019-11-29 | 2019-11-29 | Voltage signal conversion circuit and voltage signal conversion board |
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