CN219574224U - Three-phase alternating voltage signal peak value detection circuit - Google Patents
Three-phase alternating voltage signal peak value detection circuit Download PDFInfo
- Publication number
- CN219574224U CN219574224U CN202320397070.XU CN202320397070U CN219574224U CN 219574224 U CN219574224 U CN 219574224U CN 202320397070 U CN202320397070 U CN 202320397070U CN 219574224 U CN219574224 U CN 219574224U
- Authority
- CN
- China
- Prior art keywords
- electrically connected
- operational amplifier
- voltage signal
- detection circuit
- resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses a three-phase alternating voltage signal peak value detection circuit which comprises a PCBA board, wherein an operational amplifier U1, an operational amplifier U2 and a comparator U3 are arranged on the PCBA board, the three-phase alternating voltage is coupled with a diode VD1 through the operational amplifier U1 to isolate a peak value detection circuit, the three-phase alternating voltage signal peak value is detected through the operational amplifier U2, the diode VD2 and a capacitor C2, and the three-phase alternating voltage signal peak value range is output through the comparator U3. The three-phase alternating voltage signal peak value detection circuit is accurate in peak value range, and the detection circuit is provided with the triode to control the charge of the capacitor to discharge, so that the three-phase alternating voltage signal peak value detection circuit is convenient to use.
Description
Technical Field
The utility model relates to the field of circuit detection, in particular to a three-phase alternating voltage signal peak value detection circuit.
Background
The peak detection circuit is a circuit capable of detecting a peak of an ac signal. The input of the peak detection circuit is the detected signal, the output is ideally a stable peak voltage of the alternating current signal, and the output is a horizontal straight line on an oscilloscope. The ADC is used for collecting the output voltage of the peak detection circuit, so that the peak value of the voltage of the input signal can be known. Thus, the programmable amplifying circuit can be utilized to select different amplification factors according to the magnitude of the input signal. The existing three-phase alternating voltage signal peak detection circuit is not accurate enough for peak range measurement, and related devices for controlling discharge of charges of a capacitor on the detection circuit are not available, so that the use is inconvenient.
Disclosure of Invention
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model provides a three-phase alternating voltage signal peak value detection circuit, includes PCBA board, be furnished with operational amplifier U1, operational amplifier U2, comparator U3 on the PCBA board, three-phase alternating voltage isolates peak value detection circuit through operational amplifier U1 coupling one diode VD1, detects three-phase alternating voltage signal peak value through operational amplifier U2, diode VD2, electric capacity C2, exports three-phase alternating voltage signal peak value scope through comparator U3.
Further, the voltage signal input end is electrically connected with a resistor R1, the resistor R1 is electrically connected with the positive input end of the operational amplifier U1, the resistor R1 is also electrically connected with a resistor R2, and the resistor R2 is grounded.
Further, the negative input terminal of the operational amplifier U1 is electrically connected to the output terminal of the operational amplifier U1, the output terminal of the operational amplifier U1 is electrically connected to the resistor R3, and the resistor R3 is electrically connected to the diode VD1.
Further, the diode VD1 is electrically connected to the capacitor C1 and the resistor R4, and both the capacitor C1 and the resistor R4 are grounded, the diode VD1 is electrically connected to the positive input terminal of the operational amplifier U2, and the negative input terminal of the operational amplifier U2 is electrically connected to the capacitor C2, and the capacitor C2 is grounded.
Further, the negative electrode input end of the operational amplifier U2 is electrically connected with one conducting end of a triode, the other conducting end of the triode is grounded, the control end of the triode is electrically connected with a resistor R5, the resistor R5 is electrically connected with the voltage signal input end, the output end of the operational amplifier U2 is electrically connected with a diode VD2, the diode VD2 is electrically connected with the positive electrode input end of the comparator U3, and the output end of the comparator U3 is electrically connected with the voltage signal output end.
Compared with the prior art, the utility model has the following beneficial effects:
the three-phase alternating voltage signal peak value detection circuit is accurate in peak value range, and the detection circuit is provided with the triode to control the charge of the capacitor to discharge, so that the three-phase alternating voltage signal peak value detection circuit is convenient to use.
Drawings
Fig. 1 is a schematic circuit diagram of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model provides a three-phase alternating voltage signal peak value detection circuit, as shown in fig. 1, which comprises a PCBA board, wherein an operational amplifier U1, an operational amplifier U2 and a comparator U3 are arranged on the PCBA board, the three-phase alternating voltage is coupled with a diode VD1 through the operational amplifier U1 to isolate the peak value detection circuit, the three-phase alternating voltage signal peak value is detected through the operational amplifier U2, the diode VD2 and a capacitor C2, and the three-phase alternating voltage signal peak value range is output through the comparator U3. The peak value range detected by the three-phase alternating voltage signal peak value detection circuit is accurate.
In the preferred embodiment, the voltage signal input terminal is electrically connected to a resistor R1, the resistor R1 is electrically connected to the positive input terminal of the operational amplifier U1, the resistor R1 is further electrically connected to a resistor R2, and the resistor R2 is grounded. The negative input end of the operational amplifier U1 is electrically connected with the output end of the operational amplifier U1, the output end of the operational amplifier U1 is electrically connected with the resistor R3, and the resistor R3 is electrically connected with the diode VD1. The diode VD1 is respectively and electrically connected with the capacitor C1 and the resistor R4, the capacitor C1 and the resistor R4 are grounded, the diode VD1 is electrically connected with the positive input end of the operational amplifier U2, the negative input end of the operational amplifier U2 is electrically connected with the capacitor C2, and the capacitor C2 is grounded. The negative electrode input end of the operational amplifier U2 is further electrically connected with one conducting end of a triode, the other conducting end of the triode is grounded, the control end of the triode is electrically connected with a resistor R5, the resistor R5 is electrically connected with the voltage signal input end, the output end of the operational amplifier U2 is electrically connected with a diode VD2, the diode VD2 is electrically connected with the positive electrode input end of the comparator U3, and the output end of the comparator U3 is electrically connected with the voltage signal output end. The detection circuit is provided with a triode to control the charge of the capacitor to discharge, and the use is convenient.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The three-phase alternating voltage signal peak detection circuit is characterized by comprising a PCBA board, wherein an operational amplifier U1, an operational amplifier U2 and a comparator U3 are arranged on the PCBA board, the three-phase alternating voltage is coupled with a diode VD1 through the operational amplifier U1 to isolate the peak detection circuit, the three-phase alternating voltage signal peak is detected through the operational amplifier U2, the diode VD2 and a capacitor C2, and the three-phase alternating voltage signal peak range is output through the comparator U3.
2. The peak detection circuit of claim 1, wherein the voltage signal input is electrically connected to a resistor R1, the resistor R1 is electrically connected to the positive input of the operational amplifier U1, the resistor R1 is further electrically connected to a resistor R2, and the resistor R2 is grounded.
3. The peak detection circuit of claim 2, wherein the negative input terminal of the operational amplifier U1 is electrically connected to the output terminal of the operational amplifier U1, the output terminal of the operational amplifier U1 is electrically connected to the resistor R3, and the resistor R3 is electrically connected to the diode VD1.
4. A three-phase ac voltage signal peak detection circuit according to claim 3, wherein the diode VD1 is electrically connected to the capacitor C1 and the resistor R4, respectively, the capacitor C1 and the resistor R4 are grounded, the diode VD1 is electrically connected to the positive input terminal of the operational amplifier U2, the negative input terminal of the operational amplifier U2 is electrically connected to the capacitor C2, and the capacitor C2 is grounded.
5. The three-phase ac voltage signal peak detection circuit according to claim 4, wherein the negative input terminal of the operational amplifier U2 is further electrically connected to a conducting terminal of a transistor, the other conducting terminal of the transistor is grounded, the control terminal of the transistor is electrically connected to the resistor R5, the resistor R5 is electrically connected to the voltage signal input terminal, the output terminal of the operational amplifier U2 is electrically connected to the diode VD2, the diode VD2 is electrically connected to the positive input terminal of the comparator U3, and the output terminal of the comparator U3 is electrically connected to the voltage signal output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320397070.XU CN219574224U (en) | 2023-03-06 | 2023-03-06 | Three-phase alternating voltage signal peak value detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320397070.XU CN219574224U (en) | 2023-03-06 | 2023-03-06 | Three-phase alternating voltage signal peak value detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219574224U true CN219574224U (en) | 2023-08-22 |
Family
ID=87657973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320397070.XU Active CN219574224U (en) | 2023-03-06 | 2023-03-06 | Three-phase alternating voltage signal peak value detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219574224U (en) |
-
2023
- 2023-03-06 CN CN202320397070.XU patent/CN219574224U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210015156U (en) | Current detection circuit, device and electric product | |
| CN112325980A (en) | Self-balancing alternating current bridge capacitance type oil quantity sensor acquisition device and method | |
| CN203259168U (en) | Special optical signal detection circuit | |
| CN203299260U (en) | Circuit capable of acquiring narrow pulse peak value | |
| CN110456141A (en) | A kind of flash over-current detection circuit and its method | |
| CN219574224U (en) | Three-phase alternating voltage signal peak value detection circuit | |
| CN213843369U (en) | Peak current moment detection circuit for alternating current source and alternating current carrier | |
| CN107765084B (en) | Universal voltage input power frequency signal frequency measurement system | |
| CN211348397U (en) | Portable open-circuit voltage and short-circuit current detection device | |
| CN211123004U (en) | Quick detection device of high-low voltage cabinet | |
| CN209014646U (en) | The current detection circuit and electric machine controller of direct measuring type Hall sensor | |
| CN208334493U (en) | Current acquisition circuit for battery management system of electric automobile | |
| CN217443440U (en) | Current acquisition circuit and device | |
| CN109085417A (en) | The current detection circuit and electric machine controller of direct measuring type Hall sensor | |
| CN103762984A (en) | Non-communication type remote analog acquisition device | |
| CN210835177U (en) | Battery detection circuit | |
| CN210514565U (en) | Battery current detection circuit for communication | |
| CN211014450U (en) | Electrical quantity acquisition device of power distribution equipment | |
| CN208313847U (en) | A kind of detector circuit for piston cleanliness detection | |
| CN213210271U (en) | Current measuring circuit | |
| CN218727581U (en) | Current sampling circuit | |
| CN214750509U (en) | Resonant current detection circuit | |
| CN205490490U (en) | Controllable integrator circuit of discharge time | |
| CN218824477U (en) | Battery voltage sampling measurement circuit and measurement device | |
| CN112018842B (en) | Charger control system capable of prolonging service life of battery and having automatic compensation function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |