CN118169456A - Voltage verification circuit and equipment - Google Patents
Voltage verification circuit and equipment Download PDFInfo
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- CN118169456A CN118169456A CN202211573938.3A CN202211573938A CN118169456A CN 118169456 A CN118169456 A CN 118169456A CN 202211573938 A CN202211573938 A CN 202211573938A CN 118169456 A CN118169456 A CN 118169456A
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- 238000012795 verification Methods 0.000 title claims abstract description 38
- 230000000694 effects Effects 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 17
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 7
- 239000000523 sample Substances 0.000 abstract description 2
- 230000001052 transient effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 12
- 230000015556 catabolic process Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
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- Protection Of Static Devices (AREA)
Abstract
The application provides a voltage verification circuit and equipment, which comprises an overvoltage protection element and a display circuit, wherein the overvoltage protection element and the display circuit are connected in series at two ends of a pulse voltage input, the conduction characteristic of the overvoltage protection element depends on the magnitude of the pulse voltage, the display effect of the display circuit depends on the conduction characteristic of the overvoltage protection element, the rapid verification of the pulse voltage output by high-voltage generator equipment is realized, the complex verification of related equipment such as an oscilloscope, a high-voltage probe, an attenuator and the like is avoided before the transient high-voltage test is performed, and meanwhile, the verification cost can be reduced by adopting the technical scheme of the application, and the rapid verification of the voltage is further realized.
Description
Technical Field
The present application relates to the field of voltage verification, and in particular, to a voltage verification circuit and device.
Background
Prior to conducting the transient high voltage test, a corresponding verification of the test arrangement is required. Namely, whether the high-voltage generator normally outputs pulse signals or not, whether the connection between an output cable of the high-voltage generator and a coupling network to tested equipment is correct or not, and the like are verified.
The accuracy of the voltage output by the high voltage generator is related to the accuracy of the high voltage test of the tested equipment. Therefore, it is necessary to ensure the normal output of the high voltage generator through the process of verification.
When the output voltage of the electric high-voltage generator is verified, special equipment such as an oscilloscope, a high-voltage probe, an attenuator and the like is needed to be used, the equipment is high in price, verification and test are complex, and the efficiency is low.
Therefore, it is a technical problem that needs to be solved by those skilled in the art how to realize high-speed and low-cost verification of the overvoltage output by the high-voltage generator.
Disclosure of Invention
Based on the problems, the application provides a voltage verification circuit and a device, which can realize rapid and accurate identification of the voltage amplitude output by a high-voltage generator. The embodiment of the application discloses the following technical scheme:
A voltage verification circuit, the circuit comprising:
an overvoltage protection element and a display circuit;
The overvoltage protection element and the display circuit are connected in series with two ends of the pulse voltage input;
the conduction characteristic of the overvoltage protection element depends on the magnitude of the pulse voltage; the display effect of the display circuit depends on the conduction characteristics of the overvoltage protection element.
Optionally, the overvoltage protection element is one or more of a switch-type overvoltage protection element, a voltage limiting type overvoltage protection element and a large resistor of a resistor divider.
Optionally, the overvoltage protection element is the switch-type overvoltage protection element or the voltage limiting type overvoltage protection element, and the display circuit includes:
the first capacitor is connected in parallel with the first display element.
Optionally, the overvoltage protection element is a large resistor of the resistor divider, and the display circuit includes:
The small resistance of the parallel resistor divider is connected with the second display element.
Optionally, when the overvoltage protection element is the switch-type overvoltage protection element and the voltage limiting type overvoltage protection element, the display circuit further includes:
a first changeover switch; the first switching switch is used for connecting the display circuit with the overvoltage protection element;
the first switching switch is used for switching the switch-type overvoltage protection element or the voltage limiting type overvoltage protection element and is connected with the display circuit.
Optionally, the overvoltage protection element includes a large resistor of the switch-type overvoltage protection element and the resistor divider, and the large resistors of the switch-type overvoltage protection element and the resistor divider are respectively connected with different display circuits and connected in parallel to two ends of the pulse voltage input.
Optionally, when the overvoltage protection element is the voltage limiting overvoltage protection element and the resistor divider with large resistance, the voltage limiting overvoltage protection element and the resistor divider with large resistance are respectively connected with different display circuits, and the different overvoltage protection elements and the corresponding display circuits are connected in parallel to two ends of the pulse voltage input.
Optionally, the circuit further comprises:
a reverse display circuit; the reverse display circuit comprises a third display element which is reversely connected with the display element in the display circuit;
the reverse display circuit is connected in parallel with the display circuit.
Optionally, the display element included in the display circuit is at least one of:
The LED displays triode or controllable silicon.
A voltage verification device comprising a voltage verification circuit of any one of the embodiments described above.
The application provides a voltage verification circuit and equipment, which can be used for rapidly verifying the voltage value of an input pulse at a pulse voltage input end. The display condition of the display circuit is observed, so that an observer can quickly acquire the voltage value of the input pulse, and the judgment on whether the high-voltage generator outputs a normal output pulse signal is realized.
The application also provides a voltage verification device which comprises the voltage verification circuit and has the beneficial effects, and the voltage verification device is not described in detail herein.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only embodiments of the application, and that other drawings may be obtained from the drawings provided without inventive effort for the task of the person skilled in the art.
FIG. 1 is a schematic diagram of a voltage verification circuit according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a circuit formed by the switch-type overvoltage protection element and the display circuit;
FIG. 3 is a schematic circuit diagram of the voltage limiting overvoltage protection element and display circuit provided by the application;
FIG. 4 is a schematic diagram of a large resistance and display circuit of the resistor divider according to the present application;
FIG. 5 is a schematic diagram of a switching protection element with a switch;
FIG. 6 is a schematic diagram of a multi-stage cascode circuit;
Fig. 7 is a schematic diagram of a pulse waveform polarity determination circuit.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. Based on the embodiments of the present application, all other embodiments that a person of ordinary skill in the art would achieve without making any inventive effort are within the scope of the present application.
In addition, the embodiments of the present application and the features of the embodiments may be combined with each other without collision.
The invention according to the present embodiment will be described in detail with reference to the drawings and embodiments.
As shown in a voltage verification circuit shown in fig. 1, the circuit diagram provided by the application comprises an overvoltage protection element 101 and a display circuit 102, wherein the overvoltage protection element 101 and the display circuit 102 are connected in series at two ends of a pulse voltage input, the conduction characteristic of the overvoltage protection element 101 depends on the magnitude of the pulse voltage, and the display effect of the display circuit depends on the conduction characteristic of the overvoltage protection element 101.
In this embodiment, the circuit shown in fig. 1 inputs the voltage generated by the High voltage generator into the verification circuit through the High voltage terminal (High) and the Low voltage terminal (Low) to perform voltage verification, and at the same time, in a certain voltage range, the overvoltage protection element 101 generates different conduction characteristics, such as all conduction, partial conduction, and stopping conduction, according to the variation of the input pulse voltage, and in the case that the conduction state of the overvoltage protection element 101 changes, different connection voltages are generated at the two ends of the display circuit 102 connected in series with the overvoltage protection element 101, and different display effects can be generated by the display circuit 102 according to the variation of the connection voltages. Depending on the different display effects produced by the display circuit 102, the observer can directly acquire the voltage range of the input pulse voltage.
For example, when the input voltage is 1000V, the overvoltage protection element 101 breaks down, and at this time, the operating voltage across the display circuit 102 is 1000V, and the display circuit 102 is turned on, then the observer can directly learn that the pulse voltage value currently input to the voltage verification circuit is 1000V according to the characteristic that the overvoltage protection element 101 breaks down by voltage.
In one embodiment of the application, the overvoltage protection element is one or more of a switching overvoltage protection element, a voltage limiting overvoltage protection element, and a large resistor of a resistor divider.
In the embodiment of the application, the overvoltage protection element can be a switch type overvoltage protection element, a voltage limiting type overvoltage protection element and a large resistor of a resistor divider, and meanwhile, the overvoltage protection element can be only one type or different types of overvoltage protection elements are mutually combined.
In one embodiment of the present application, the overvoltage protection element is a switching type overvoltage protection element or a voltage limiting type overvoltage protection element, and the display circuit includes:
the first capacitor is connected in parallel with the first display element.
In the circuit schematic diagram formed by the switch-type overvoltage protection element GDT and the display circuit shown in fig. 2, when the overvoltage protection element 101 is a switch-type overvoltage protection element, the display circuit is connected in parallel with the first display element LED by the first capacitor C, and the display circuit and the switch-type overvoltage protection element are connected to the pulse voltage input terminal.
Further, in this embodiment, the first display element LED is connected in series with the protection resistor R and then connected in parallel with the first capacitor.
The content of the present embodiment realizes the judgment and display of the on state by using a capacitor connected in series in the circuit and a light emitting diode (first display element LED) connected in parallel with the capacitor. Pulse signals are input to the High end and the Low end of the circuit, when the pulse voltage is larger than the pulse breakdown voltage of the switch-type overvoltage protection element, the switch-type overvoltage protection element is conducted, and the capacitor C is charged by pulse current. After the charge is completed, the capacitor C discharges through the resistor R and briefly (for several seconds) lights up the LED. If the peak value of the pulse voltage is small, the switch-type overvoltage protection element cannot be broken down, and no current flows through the capacitor, the LED cannot be lighted.
If the breakdown voltage of the switching type overvoltage protection element is selected to be 1000V, it can be detected and judged whether the peak value of the pulse exceeds 1000V by the circuit shown in fig. 2. Due to test conditions such as ambient temperature, errors (generally + -10%) of the output voltage of the pulse signal generator, variations in breakdown voltage of the switching overvoltage protection element, and the like, the relevant parameters of the design of the actual test device need to be adjusted as necessary.
In the circuit schematic diagram formed by the voltage limiting type overvoltage protection element TVS and the display circuit shown in fig. 3, when the overvoltage protection element 101 is a voltage limiting type overvoltage protection element, the display circuit is a first capacitor C connected in parallel with the first display element LED, and the display circuit and the voltage limiting type overvoltage protection element are connected to the pulse voltage input terminal.
The embodiment utilizes the capacitor connected in series in the circuit, the resistor connected in parallel with the capacitor and the light-emitting diode to judge and display the conducting state. As shown in fig. 3, when pulse signals are input to the High and Low ends of the circuit, and the pulse voltage is larger than the reverse breakdown voltage of the voltage limiting overvoltage protection element, the impedance of the voltage limiting overvoltage protection element drops sharply, and the pulse current flowing through the voltage limiting overvoltage protection element charges the first capacitor C. After the charging is finished, the first capacitor C discharges through the resistor R, and the first display element LED is briefly lightened. If the peak value of the pulse voltage is smaller than the reverse breakdown voltage of the voltage limiting overvoltage protection element, no current flows through the capacitor or only a small current flows through the capacitor, the first display element LED cannot be lighted or the first display element LED is lighted weakly.
In one embodiment of the present application, the overvoltage protection element is a large resistor of a resistor divider, and the display circuit includes:
and a small protection resistor connected in parallel with the second display element.
In this embodiment, the voltage value of the output pulse is obtained by means of the resistor voltage dividing function between the series resistors, specifically, as shown in fig. 4, a voltage divider is formed by using the large resistor and the small resistor of the resistor voltage divider, the two ends of the small resistor of the resistor voltage divider are connected in parallel with the second display element, the pulse is applied to the two ends of the circuit, and the brightness change of the second display element is observed to determine the pulse voltage. R1 is a large resistor, R2 is a small resistor, and when pulse signals are applied to high and low ends, the LED is briefly lighted by a smaller voltage of R2. The ratio of R1 to R2 is adjusted, when the pulse voltage is larger (such as 2 kV), the LED is normally lighted, and when the pulse voltage is smaller (such as 500V), the LED is faintly lighted.
In one embodiment of the present application, when the overvoltage protection element is a switching overvoltage protection element and a voltage limiting overvoltage protection element, the display circuit further includes:
a first changeover switch; the first switch is used for connecting the display circuit and the overvoltage protection element;
The first switch is used for switching the switch type overvoltage protection element or the voltage limiting type overvoltage protection element and is connected with the display circuit.
As shown in a schematic diagram of a switching protection element in fig. 5, when the overvoltage protection element of the present application includes both a switching overvoltage protection element and a voltage limiting overvoltage protection element, the addition of the first switch can realize the switching with the switching overvoltage protection element and the voltage limiting overvoltage protection element, respectively, so that the switching overvoltage protection element and the voltage limiting overvoltage protection element can be connected with a display circuit, respectively, and the overvoltage verification circuit of the present application realizes the measurement of voltage pulses with different types and different voltage classes by one circuit. Meanwhile, in this embodiment, the number of the switch-type overvoltage protection elements or the voltage limiting type overvoltage protection elements is not specifically limited, and may be a plurality of the switch-type overvoltage protection elements or the voltage limiting type overvoltage protection elements, and the specific number may be selected according to actual requirements.
In one embodiment of the present application, the overvoltage protection element includes a voltage limiting overvoltage protection element and a large resistor of a resistor divider, the voltage limiting overvoltage protection element and the large resistor of the resistor divider are respectively connected with different display circuits, and the different overvoltage protection elements and the corresponding display circuits are connected in parallel to both ends of the pulse voltage input.
The schematic diagram of a multi-stage cascade circuit shown in fig. 6, in which the overvoltage protection element includes a voltage limiting overvoltage protection element TVS and a resistor divider with a large resistor R2, the voltage limiting overvoltage protection element and the resistor divider with a large resistor are connected with respective corresponding display circuits, so as to form respective verification circuits, the verification circuits between the two are connected in parallel and are connected to the pulse voltage input terminal at the same time, and the circuit is called as a multi-stage cascade structure as a whole. The display circuit of the voltage limiting type overvoltage protection element TVS is composed of a C and an LED1 connected in parallel with the C, wherein the LED1 is connected with a protection resistor R1. The large resistor R2 of the resistor divider is connected in series with the small resistor R3 of the resistor divider, wherein the small resistor R3 is connected in parallel with the display element LED 2.
In the embodiment of the application, the specific size of the voltage limiting overvoltage protection element can be designed, so that the LED1 can be lightened when the impulse voltage of the circuit is larger than the reverse breakdown voltage of the TVS, otherwise, the LED2 is lightened, and the sensitive reaction of the circuit to the change of the voltage interval is realized.
In another embodiment of the present application, when the overvoltage protection element is a large resistor of the switch-type overvoltage protection element and the resistor divider, the large resistors of the switch-type overvoltage protection element and the resistor divider are respectively connected with different display circuits, and the different voltage protection elements and the corresponding display circuits are connected in parallel to two ends of the pulse voltage input.
Compared with the previous embodiment, the present embodiment replaces the voltage limiting overvoltage protection element with the switching overvoltage protection element, and the same technical scheme as that of the previous embodiment is implemented in the present embodiment, and no further description is given here.
In another embodiment of the application, the circuit further comprises:
a reverse display circuit; the reverse display circuit comprises a third display element which is reversely connected with the display element in the display circuit;
the reverse display circuit is connected in parallel with the display circuit.
In the circuit shown in fig. 7, a reverse display circuit is designed and connected in parallel with the display circuit, and the reverse circuit is embodied by including a third display element LED3 connected in reverse to the first display element LED1 of the display circuit, wherein each of the LED1 and the LED3 is connected in series with a protection resistor R. When the LED1 is turned on, it is determined that the pulse voltage input terminal inputs the positive polarity voltage, and when the LED3 is turned on, it is determined that the pulse voltage input terminal inputs the negative polarity voltage. When voltages with different polarities are input, the LEDs of the display elements in different directions are lighted, so that the judgment of the polarities of the input voltage pulses is realized.
The display element included in the display circuit is at least one of:
The LED displays triode or controllable silicon.
A voltage verification device comprising an overvoltage verification circuit as in any one of the above embodiments.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The voltage verification circuit and the voltage verification device provided by the application are described in detail. The principles and embodiments of the present application have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present application and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the application can be made without departing from the principles of the application and these modifications and adaptations are intended to be within the scope of the application as defined in the following claims.
Claims (10)
1. A voltage verification circuit, the circuit comprising:
an overvoltage protection element and a display circuit;
The overvoltage protection element and the display circuit are connected in series with two ends of the pulse voltage input;
the conduction characteristic of the overvoltage protection element depends on the magnitude of the pulse voltage; the display effect of the display circuit depends on the conduction characteristics of the overvoltage protection element.
2. The circuit of claim 1, wherein the overvoltage protection element is one or more of a switching overvoltage protection element, a voltage limiting overvoltage protection element, and a large resistance of a resistor divider.
3. The circuit according to claim 2, wherein the overvoltage protection element is the switching type overvoltage protection element or the voltage limiting type overvoltage protection element, the display circuit comprising:
the first capacitor is connected in parallel with the first display element.
4. The circuit of claim 2, wherein the overvoltage protection element is a large resistance of the resistive divider, the display circuit comprising:
The small resistance of the parallel resistor divider is connected with the second display element.
5. The circuit according to claim 2, wherein when the overvoltage protection element is the switching overvoltage protection element and the voltage limiting overvoltage protection element, the display circuit further includes:
a first changeover switch; the first switching switch is used for connecting the display circuit with the overvoltage protection element;
the first switching switch is used for switching the switch-type overvoltage protection element or the voltage limiting type overvoltage protection element and is connected with the display circuit.
6. The circuit of claim 2, wherein the overvoltage protection element comprises a large resistor of the switch-type overvoltage protection element and the resistor divider, the large resistors of the switch-type overvoltage protection element and the resistor divider being connected to different ones of the display circuits, respectively, the different overvoltage protection elements being connected in parallel to the pulse voltage input across a verification circuit of the corresponding display circuit.
7. The circuit of claim 2, wherein when the overvoltage protection element is the large resistance of the voltage limiting overvoltage protection element and the resistor divider, the large resistances of the voltage limiting overvoltage protection element and the resistor divider are respectively connected with different display circuits, and the verification circuits formed by the different overvoltage protection elements and the corresponding display circuits are connected in parallel to both ends of the pulse voltage input.
8. The circuit of claim 1, wherein the circuit further comprises:
a reverse display circuit; the reverse display circuit comprises a third display element which is reversely connected with the display element in the display circuit;
the reverse display circuit is connected in parallel with the display circuit.
9. The circuit of claim 1, wherein the display element included in the display circuit is at least one of:
The LED displays triode or controllable silicon.
10. A voltage verification apparatus comprising a voltage verification circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211573938.3A CN118169456A (en) | 2022-12-08 | 2022-12-08 | Voltage verification circuit and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211573938.3A CN118169456A (en) | 2022-12-08 | 2022-12-08 | Voltage verification circuit and equipment |
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| Publication Number | Publication Date |
|---|---|
| CN118169456A true CN118169456A (en) | 2024-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211573938.3A Pending CN118169456A (en) | 2022-12-08 | 2022-12-08 | Voltage verification circuit and equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118465516A (en) * | 2024-07-11 | 2024-08-09 | 康明斯新能源动力(上海)有限公司 | Test circuit and test tool |
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2022
- 2022-12-08 CN CN202211573938.3A patent/CN118169456A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118465516A (en) * | 2024-07-11 | 2024-08-09 | 康明斯新能源动力(上海)有限公司 | Test circuit and test tool |
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