Voltage monitoring device

Abstract

The utility model discloses a voltage monitoring device, which relates to the technical field of voltage detection, and comprises a control module, a voltage detection module and a voltage interval identification module, the control module is respectively connected with the voltage detection module and the voltage interval identification module, and the voltage interval identification module comprises a first optocoupler and a second optocoupler. When the first power supply to be detected is in a low-voltage interval, the first optocoupler is conducted, the control module detects a high-level signal through the first optocoupler, and the control module controls the voltage detection module to be adjusted to a low-voltage measurement gear; when the first power supply to be detected is in a high-voltage interval, the second optocoupler is conducted, the control module detects a high-level signal through the second optocoupler, and the control module controls the voltage detection module to be adjusted to a high-voltage measurement gear. According to the invention, the voltage interval can be automatically identified through the first optocoupler and the second optocoupler, then the voltage measurement gear is automatically adjusted, the measurement gear does not need to be manually adjusted, and the accuracy and intelligence of voltage measurement are improved.

Description

Technical Field

[0001] This utility model relates to the field of voltage detection technology, and in particular to a voltage monitoring device. Background Technology

[0002] When equipment circuits malfunction, it is often necessary to use a multimeter to measure the voltage of the circuit to find the abnormal voltage point, and then conduct a detailed analysis and repair of the abnormal point. However, multimeters require manual adjustment of the high voltage and low voltage ranges. If the range is forgotten to be adjusted, the measurement accuracy will be low when using the high voltage range to measure low voltage, and the multimeter may be damaged when using the low voltage range to measure high voltage. Utility Model Content

[0003] The purpose of this invention is to provide a voltage monitoring device. This application can automatically identify the voltage range through the first optocoupler and the second optocoupler, and then automatically adjust the voltage measurement range without the need for manual adjustment of the measurement range, thereby improving the accuracy and intelligence of voltage measurement.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] One aspect of this utility model provides a voltage monitoring device, which includes a control module, a voltage detection module, and a voltage range identification module. The control module is connected to both the voltage detection module and the voltage range identification module. The voltage range identification module includes: a first resistor and a second resistor, with a first end of the first resistor and a first end of the second resistor connected together, the second end of the first resistor used to receive the positive terminal of a first power source to be detected, and the second end of the second resistor used to receive the location of the first power source to be detected; a first optocoupler, a third resistor, a fourth resistor, and a fifth resistor, with the light-emitting input terminal of the first optocoupler connected to the second end of the first resistor via the third resistor, the light-emitting output terminal of the first optocoupler connected to the second end of the second resistor, and the light-receiving input terminal of the first optocoupler connected to the positive terminal of a second power source via the fourth resistor. The first optocoupler's light-receiving output terminal is connected to the first terminal of the fifth resistor and the control module, and the second terminal of the fifth resistor is connected to a second location. A second optocoupler, a sixth resistor, and a seventh resistor are also present. The second optocoupler's light-emitting input terminal is connected to the first terminal of the first resistor and the first terminal of the second resistor. The second optocoupler's light-emitting output terminal is connected to the second terminal of the second resistor. The second optocoupler's light-receiving input terminal is connected to the positive terminal of a second power supply through the sixth resistor. The second optocoupler's light-receiving output terminal is connected to the first terminal of the seventh resistor and the control module, and the second terminal of the seventh resistor is connected to a second location. When the first optocoupler is working, the control module controls the voltage detection module to adjust to a first measurement level detection voltage. When the second optocoupler is working, the control module controls the voltage detection module to adjust to a second measurement level detection voltage.

[0006] In some embodiments, the voltage range identification module further includes a third optocoupler, an eighth resistor, a ninth resistor, a tenth resistor, and an eleventh resistor. The eighth resistor is disposed between the first resistor and the second resistor. The light-emitting input terminal of the third optocoupler is connected to the first terminal of the eighth resistor and the first terminal of the first resistor through the ninth resistor. The second terminal of the eighth resistor is connected to the first terminal of the second resistor and the light-emitting input terminal of the second optocoupler. The light-emitting output terminal of the third optocoupler is connected to a first location. The light-receiving input terminal of the third optocoupler is connected to a second power supply through the tenth resistor. The light-receiving output terminal of the third optocoupler is connected to the first terminal of the eleventh resistor and the control module. The second terminal of the eleventh resistor is connected to a second location.

[0007] In some embodiments, the voltage range identification module further includes a first PMOS transistor, a second PMOS transistor, a twelfth resistor, and a thirteenth resistor. The twelfth and thirteenth resistors are disposed between the third resistor and the light-emitting input terminal of the first optocoupler. The source of the first PMOS transistor is connected to the second terminal of the first resistor through the third resistor. The source of the first PMOS transistor is connected to the light-emitting input terminal of the first optocoupler through the twelfth and thirteenth resistors in sequence. The gate of the first PMOS transistor is connected to the first terminal of the eighth resistor and the first terminal of the first resistor. The drain of the first PMOS transistor is connected to the source of the second PMOS transistor and is connected to the light-emitting input terminal of the third optocoupler through the ninth resistor. The gate of the second PMOS transistor is connected to the second terminal of the eighth resistor and the first terminal of the second resistor. The drain of the second PMOS transistor is connected to the light-emitting input terminal of the second optocoupler.

[0008] In some embodiments, the voltage monitoring device further includes a battery for outputting the positive terminal and a second location of a second power source to supply power to the control module, the voltage detection module, and the voltage range identification module.

[0009] In some embodiments, the voltage monitoring device further includes a rectification and filtering module, which includes a rectifier bridge, a fourteenth resistor, a first capacitor, and a second capacitor. The positive output terminal of the rectifier bridge is connected to the positive terminal of the first capacitor, the positive terminal of the second capacitor, and the second terminal of the first resistor through the fourteenth resistor. The negative output terminal of the rectifier bridge is connected to the negative terminal of the first capacitor, the negative terminal of the second capacitor, and the second terminal of the second resistor. The two ends of the input terminal of the rectifier bridge are respectively connected to the positive terminal of the first power supply to be detected and the location.

[0010] In some embodiments, the voltage monitoring device further includes a switch, one end of which is connected to the two ends of the input terminal of the rectifier bridge, and the other end of which is connected to the positive terminal of the first power supply to be detected and the location, respectively.

[0011] A voltage monitoring device according to an embodiment of the present invention has at least the following beneficial effects: a first resistor, a second resistor, and an eighth resistor form a voltage divider circuit, and the voltage after voltage division is detected by a first PMOS transistor and a second PMOS transistor, respectively. When neither the first nor the second PMOS transistor is turned on, the first optocoupler is turned on, indicating that the measured voltage is in the low-voltage range; when the first PMOS transistor is turned on, the third optocoupler is turned on, indicating that the measured voltage is in the medium-voltage range; when the second PMOS transistor is turned on, the second optocoupler is turned on, indicating that the measured voltage is in the high-voltage range. This application can automatically identify the voltage range through the first PMOS transistor, the second PMOS transistor, the first optocoupler, the second optocoupler, and the third optocoupler, and then automatically adjust the voltage measurement range, eliminating the need for manual adjustment of the measurement range, thus improving the accuracy and intelligence of voltage measurement.

[0012] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this disclosure. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a circuit schematic diagram of the first embodiment of this application;

[0015] Figure 2 This is a circuit schematic diagram of a second embodiment of this application;

[0016] Figure 3 This is a circuit schematic diagram of the third embodiment of this application. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the description of this disclosure will be more complete and fully convey the concept of the exemplary embodiments to those skilled in the art. The drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0021] The technical solutions of the embodiments of this application are briefly described below:

[0022] According to some embodiments, such as Figure 1 As shown, this application provides a voltage monitoring device, which includes a control module, a voltage detection module, and a voltage range identification module. The control module is connected to both the voltage detection module and the voltage range identification module. The voltage range identification module includes:

[0023] The specific connection method of the first resistor R1 and the second resistor R2, the first optocoupler U1, the third resistor R3, the fourth resistor R4 and the fifth resistor R5, the second optocoupler U2, the sixth resistor R6 and the seventh resistor R7 is as follows.

[0024] The first end of the first resistor R1 is connected to the first end of the second resistor R2. The second end of the first resistor R1 is used to receive the positive terminal of the first power source to be detected, and the second end of the second resistor R2 is used to receive the location of the first power source to be detected.

[0025] The light-emitting input terminal of the first optocoupler U1 is connected to the second terminal of the first resistor R1 through the third resistor R3. The light-emitting output terminal of the first optocoupler U1 is connected to the second terminal of the second resistor R2. The light-receiving input terminal of the first optocoupler U1 is connected to the positive terminal of the second power supply through the fourth resistor R4. The light-receiving output terminal of the first optocoupler U1 is connected to the first terminal of the fifth resistor R5 and the control module. The second terminal of the fifth resistor R5 is connected to the second location.

[0026] The light-emitting input terminal of the second optocoupler U2 is connected to the first terminal of the first resistor R1 and the first terminal of the second resistor R2. The light-emitting output terminal of the second optocoupler U2 is connected to the second terminal of the second resistor R2. The light-receiving input terminal of the second optocoupler U2 is connected to the positive terminal of the second power supply through the sixth resistor R6. The light-receiving output terminal of the second optocoupler U2 is connected to the first terminal of the seventh resistor R7 and the control module. The second terminal of the seventh resistor R7 is connected to the second location.

[0027] When the first optocoupler U1 is working, the control module controls the voltage detection module to adjust to the first measurement range to detect the voltage.

[0028] When the second optocoupler U2 is working, the control module controls the voltage detection module to adjust to the second measurement range to detect the voltage.

[0029] The working principle of the above embodiment is as follows: when the first power supply to be detected is in the low-voltage range, the first optocoupler U1 is turned on, and the control module detects a high-level signal through the first optocoupler U1. The control module then controls the voltage detection module to adjust to the low-voltage measurement range. When the first power supply to be detected is in the high-voltage range, the second optocoupler U2 is turned on, and the control module detects a high-level signal through the second optocoupler U2. The control module then controls the voltage detection module to adjust to the high-voltage measurement range. This application can automatically identify the voltage range through the first optocoupler U1 and the second optocoupler U2, and then automatically adjust the voltage measurement range without requiring manual adjustment of the measurement range, thus improving the accuracy and intelligence of voltage measurement.

[0030] The following is in conjunction with the appendix to this instruction manual. Figures 2 to 3 The preferred embodiments of this disclosure will be further described in detail below.

[0031] According to some embodiments, such as Figure 2 As shown, the voltage range identification module also includes a third optocoupler U3, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, and an eleventh resistor R11, whose specific connection method is as follows:

[0032] The eighth resistor R8 is positioned between the first resistor R1 and the second resistor R2. The light-emitting input terminal of the third optocoupler U3 is connected to the first terminal of the eighth resistor R8 and the first terminal of the first resistor R1 through the ninth resistor R9. The second terminal of the eighth resistor R8 is connected to the first terminal of the second resistor R2 and the light-emitting input terminal of the second optocoupler U2. The light-emitting output terminal of the third optocoupler U3 is connected to the first location. The light-receiving input terminal of the third optocoupler U3 is connected to the second power supply through the tenth resistor R10. The light-receiving output terminal of the third optocoupler U3 is connected to the first terminal of the eleventh resistor R11 and the control module. The second terminal of the eleventh resistor R11 is connected to the second location.

[0033] The working principle of the above embodiment is as follows: when the first power supply to be detected is in the low-voltage range, the first optocoupler U1 is turned on, and the control module detects a high-level signal through the first optocoupler U1. The control module then controls the voltage detection module to adjust to the low-voltage measurement range. When the first power supply to be detected is in the medium-voltage range, the third optocoupler U3 is turned on, and the control module detects a high-level signal through the third optocoupler U3. The control module then controls the voltage detection module to adjust to the medium-voltage measurement range. When the first power supply to be detected is in the high-voltage range, the second optocoupler U2 is turned on, and the control module detects a high-level signal through the second optocoupler U2. The control module then controls the voltage detection module to adjust to the high-voltage measurement range. This application can automatically identify the voltage range through the first optocoupler U1 and the second optocoupler U2, and then automatically adjust the voltage measurement range, eliminating the need for manual adjustment of the measurement range and improving the accuracy and intelligence of voltage measurement.

[0034] According to some embodiments, such as Figure 3 As shown, the voltage range identification module also includes a first PMOS transistor Q1, a second PMOS transistor Q2, a twelfth resistor R12, and a thirteenth resistor R13. The twelfth resistor R12 and the thirteenth resistor R13 are located between the third resistor R3 and the light-emitting input terminal of the first optocoupler U1. The specific connection method is as follows:

[0035] The source of the first PMOS transistor Q1 is connected to the second terminal of the first resistor R1 through the third resistor R3. The source of the first PMOS transistor Q1 is connected to the light-emitting input terminal of the first optocoupler U1 through the twelfth resistor R12 and the thirteenth resistor R13. The gate of the first PMOS transistor Q1 is connected to the first terminal of the eighth resistor R8 and the first terminal of the first resistor R1. The drain of the first PMOS transistor Q1 is connected to the source of the second PMOS transistor Q2 and is connected to the light-emitting input terminal of the third optocoupler U3 through the ninth resistor R9. The gate of the second PMOS transistor Q2 is connected to the second terminal of the eighth resistor R8 and the first terminal of the second resistor R2. The drain of the second PMOS transistor Q2 is connected to the light-emitting input terminal of the second optocoupler U2.

[0036] The working principle of the above embodiment is as follows: when the first power supply to be detected is in the low voltage range, neither the first PMOS transistor Q1 nor the second PMOS transistor Q2 is turned on, the first optocoupler U1 is turned on, the control module detects a high-level signal through the first optocoupler U1, and the control module controls the voltage detection module to adjust to the low voltage measurement range.

[0037] When the first power supply to be tested is in the medium voltage range, the second PMOS transistor Q2 is not turned on, the first PMOS transistor Q1 is turned on, and the twelfth resistor R12 and the thirteenth resistor R13 are present, causing the first optocoupler U1 to be turned off and the third optocoupler U3 to be turned on. The control module detects a high-level signal through the third optocoupler U3, and the control module controls the voltage detection module to adjust to the medium voltage measurement range.

[0038] When the first power supply to be tested is in the high-voltage range, the first PMOS transistor Q1 and the second PMOS transistor Q2 are turned on. The twelfth resistor R12, the thirteenth resistor R13, and the ninth resistor R9 cause the first optocoupler U1 and the third optocoupler U3 to be turned off, and the second optocoupler U2 to be turned on. The control module detects a high-level signal through the second optocoupler U2, and the control module controls the voltage detection module to adjust to the high-voltage measurement range.

[0039] This application can automatically identify the voltage range through the first PMOS transistor Q1, the second PMOS transistor Q2, the first optocoupler U1, the second optocoupler U2, and the third optocoupler U3, and then automatically adjust the voltage measurement range without the need for manual adjustment of the measurement range, thus improving the accuracy and intelligence of voltage measurement.

[0040] According to some embodiments, such as Figure 3 As shown, the voltage monitoring device also includes a battery BT, which is used to output the positive terminal and the second location of the second power source to supply power to the control module, the voltage detection module and the voltage range identification module.

[0041] According to some embodiments, such as Figure 3 As shown, the voltage monitoring device also includes a rectification and filtering module, which includes a rectifier bridge DB, a fourteenth resistor R14, a first capacitor C1, and a second capacitor C2. The positive output terminal of the rectifier bridge DB is connected to the positive terminal of the first capacitor C1, the positive terminal of the second capacitor C2, and the second terminal of the first resistor R1 through the fourteenth resistor R14. The negative output terminal of the rectifier bridge DB is connected to the negative terminal of the first capacitor C1, the negative terminal of the second capacitor C2, and the second terminal of the second resistor R2. The two ends of the input terminal of the rectifier bridge DB are respectively connected to the positive terminal of the first power supply to be detected and the location.

[0042] This application includes a rectifier bridge DB, which allows the voltage monitoring device to measure both AC and DC power sources without requiring time to distinguish between AC and DC voltage.

[0043] According to some embodiments, such as Figure 3 As shown, the voltage monitoring device also includes a switch S. One end of the switch S is connected to the two ends of the input terminal of the rectifier bridge DB, and the other end of the switch S is connected to the positive terminal of the first power supply to be tested and the location, respectively.

[0044] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0045] Although this disclosure has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Because this disclosure can be embodied in many forms without departing from the spirit or substance of this application, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A voltage monitoring device, characterized in that, The voltage monitoring device includes a control module, a voltage detection module, and a voltage range identification module. The control module is connected to both the voltage detection module and the voltage range identification module. The voltage range identification module includes: A first resistor and a second resistor, wherein the first end of the first resistor and the first end of the second resistor are connected, the second end of the first resistor is used to receive the positive terminal of the first power source to be detected, and the second end of the second resistor is used to receive the location of the first power source to be detected. The first optocoupler consists of a first optocoupler, a third resistor, a fourth resistor, and a fifth resistor. The light-emitting input terminal of the first optocoupler is connected to the second terminal of the first resistor via the third resistor. The light-emitting output terminal of the first optocoupler is connected to the second terminal of the second resistor. The light-receiving input terminal of the first optocoupler is connected to the positive terminal of a second power supply via the fourth resistor. The light-receiving output terminal of the first optocoupler is connected to the first terminal of the fifth resistor and the control module. The second terminal of the fifth resistor is connected to a second location. The second optocoupler, the sixth resistor, and the seventh resistor are connected as follows: the light-emitting input terminal of the second optocoupler is connected to the first terminal of the first resistor and the first terminal of the second resistor; the light-emitting output terminal of the second optocoupler is connected to the second terminal of the second resistor; the light-receiving input terminal of the second optocoupler is connected to the positive terminal of the second power supply through the sixth resistor; the light-receiving output terminal of the second optocoupler is connected to the first terminal of the seventh resistor and the control module; and the second terminal of the seventh resistor is connected to the second location. When the first optocoupler is working, the control module controls the voltage detection module to adjust to the first measurement level detection voltage; When the second optocoupler is working, the control module controls the voltage detection module to adjust to the second measurement range detection voltage.

2. The voltage monitoring device according to claim 1, characterized in that, The voltage range identification module further includes a third optocoupler, an eighth resistor, a ninth resistor, a tenth resistor, and an eleventh resistor. The eighth resistor is disposed between the first resistor and the second resistor. The light-emitting input terminal of the third optocoupler is connected to the first terminal of the eighth resistor and the first terminal of the first resistor through the ninth resistor. The second terminal of the eighth resistor is connected to the first terminal of the second resistor and the light-emitting input terminal of the second optocoupler. The light-emitting output terminal of the third optocoupler is connected to a first location. The light-receiving input terminal of the third optocoupler is connected to a second power supply through the tenth resistor. The light-receiving output terminal of the third optocoupler is connected to the first terminal of the eleventh resistor and the control module. The second terminal of the eleventh resistor is connected to a second location.

3. The voltage monitoring apparatus of claim 2, wherein The voltage range identification module further includes a first PMOS transistor, a second PMOS transistor, a twelfth resistor, and a thirteenth resistor. The twelfth and thirteenth resistors are disposed between the third resistor and the light-emitting input terminal of the first optocoupler. The source of the first PMOS transistor is connected to the second terminal of the first resistor through the third resistor. The source of the first PMOS transistor is connected to the light-emitting input terminal of the first optocoupler through the twelfth and thirteenth resistors in sequence. The gate of the first PMOS transistor is connected to the first terminal of the eighth resistor and the first terminal of the first resistor. The drain of the first PMOS transistor is connected to the source of the second PMOS transistor and is connected to the light-emitting input terminal of the third optocoupler through the ninth resistor. The gate of the second PMOS transistor is connected to the second terminal of the eighth resistor and the first terminal of the second resistor. The drain of the second PMOS transistor is connected to the light-emitting input terminal of the second optocoupler.

4. The voltage monitoring device according to claim 1, characterized in that, The voltage monitoring device also includes a battery, which is used to output the positive terminal and the second location of a second power source to supply power to the control module, the voltage detection module and the voltage range identification module.

5. The voltage monitoring device according to claim 1, characterized in that, The voltage monitoring device further includes a rectification and filtering module, which includes a rectifier bridge, a fourteenth resistor, a first capacitor, and a second capacitor. The positive output terminal of the rectifier bridge is connected to the positive terminal of the first capacitor, the positive terminal of the second capacitor, and the second terminal of the first resistor through the fourteenth resistor. The negative output terminal of the rectifier bridge is connected to the negative terminal of the first capacitor, the negative terminal of the second capacitor, and the second terminal of the second resistor. The two ends of the input terminal of the rectifier bridge are respectively connected to the positive terminal of the first power supply to be detected and the location.

6. The voltage monitoring device according to claim 5, characterized in that, The voltage monitoring device also includes a switch, with one end of the switch connected to the two ends of the input terminal of the rectifier bridge, and the other end of the switch connected to the positive terminal of the first power supply to be tested and the location, respectively.

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