CN214674890U - Camera power supply capable of power frequency detection - Google Patents
Camera power supply capable of power frequency detection Download PDFInfo
- Publication number
- CN214674890U CN214674890U CN202120817676.5U CN202120817676U CN214674890U CN 214674890 U CN214674890 U CN 214674890U CN 202120817676 U CN202120817676 U CN 202120817676U CN 214674890 U CN214674890 U CN 214674890U
- Authority
- CN
- China
- Prior art keywords
- path
- capacitor
- pins
- detection
- pin
- 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
Images
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses a camera power supply capable of power frequency detection, which comprises a power circuit, a detection circuit, a conversion circuit and a transmission interface; the input end of the detection circuit is connected with the power circuit, and the output end of the detection circuit is connected with the transmission interface through the conversion circuit; the output end of the power circuit is electrically connected with the transmission interface, the detection circuit carries out real-time detection and detection on the actual alternating current which is accessed, after data conversion is carried out through the conversion circuit, the actual power frequency detection result is output through the transmission interface, other instruments and equipment are not required to be used for power frequency detection, and the detection circuit is very convenient, can realize real-time power frequency detection while providing a reliable and stable working power supply for the camera, and provides basic data information for automatic power frequency adjustment of the camera.
Description
Technical Field
The utility model relates to a camera power supply ware, but especially a camera power supply that power frequency detected.
Background
When the household camera is used for night shooting by using lamplight illumination, rolling stripes often appear on shot pictures, when exposure time is integral multiple of a power frequency period, the exposure time of each line of images is consistent, the exposure starting point of each frame is also consistent, bright and dark intervals and bright and dark rolling stripes do not appear on the images, and if the exposure time is smaller than the power frequency period or larger than the power frequency period but not integral multiple of the power frequency period, the rolling phenomenon of the bright and dark stripes can be eliminated by adjusting the frame rate of the camera.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a but camera power supply of power frequency detection.
The utility model provides a technical scheme that its technical problem adopted is:
a camera power supply capable of power frequency detection comprises a power circuit, a detection circuit, a conversion circuit and a transmission interface; the input end of the detection circuit is electrically connected with the power supply circuit, and the output end of the detection circuit is electrically connected with the transmission interface through the conversion circuit; and the output end of the power supply circuit is electrically connected with the transmission interface.
The power supply circuit comprises a transformer T1, a rectifier bridge D1, a capacitor C2, a capacitor C3, a voltage stabilizing chip U1, a capacitor C1 and a capacitor C4; the 1 and 2 terminal pins of the transformer T1 are respectively connected with a live wire and a zero wire, and the 3 and 4 terminal pins are respectively connected with a positive phase input end and a negative phase input end of the rectifier bridge D1; the negative electrode output end of the rectifier bridge D1 is grounded, the positive electrode output end is divided into three paths, the first path and the second path are grounded after passing through the capacitor C2 and the capacitor C3 respectively, and the third path is connected with the pin 1 of the voltage stabilizing chip U1; the 2 pins of the voltage stabilizing chip U1 are grounded, the 3 pins are divided into three paths, the first path and the second path are grounded through the capacitor C1 and the capacitor C4, and the third path is connected with the 1 pin of the transmission interface.
The detection circuit comprises a photoelectric coupler U2, a photoelectric coupler U5, a resistor R1, a resistor R3, a resistor R2, a resistor R4, a capacitor C5 and a detection chip U3; the 1 pin of the photoelectric coupler U2 is divided into two paths after passing through the resistor R1, one path is connected with the node of the positive phase input end of the rectifier bridge D1 and the 3 pin of the transformer T1, and the other path is connected with the 2 pin of the photoelectric coupler U5; the 2 pins of the photoelectric coupler U2 are divided into two paths, one path is connected with the node of the negative phase input end of the rectifier bridge D1 and the 4 pin of the transformer T1, and the other path is connected with the 1 pin of the photoelectric coupler U5 through the resistor R3; the 4 pins of the photoelectric coupler U2 are grounded, the 3 pins are divided into two paths, one path is connected with 5V voltage through the resistor R2, and the other path is connected with the 1 pin of the detection chip U3; the 4 pins of the photoelectric coupler U5 are grounded, the 3 pins are divided into two paths, one path is connected with 5V voltage through the resistor R4, and the other path is connected with the 2 pins of the detection chip U3; one end of the capacitor C5 is grounded, the other end of the capacitor C5 is divided into two paths, one path is connected with 5V voltage, and the other path is connected with the 6 pin of the detection chip U3.
The conversion circuit comprises a conversion chip U4, a crystal oscillator Y1, a capacitor C6, a capacitor C7, a capacitor C8 and a capacitor C9; pins 9 and 10 of the detection chip U3 are respectively connected with pins 3 and 4 of the conversion chip U4; one end of the capacitor C6 is grounded, the other end of the capacitor C6 is divided into three paths, one path is connected with 5V voltage, and the second path and the third path are respectively connected with pins 13 and 20 of the conversion chip U4; one end of the capacitor C7 is grounded, and the other end of the capacitor C7 is connected with a 6 pin of the conversion chip U4; pins 2 and 4 of the crystal oscillator Y1 are grounded, pin 1 is divided into two paths, one path is connected with pin 9 of the conversion chip U4, the other path is grounded through the capacitor C9, pin 3 of the crystal oscillator Y1 is divided into two paths, one path is connected with pin 10 of the conversion chip U4, and the other path is grounded through the capacitor C8; the 4 pins of the transmission interface are grounded, and the 2 pins and the 3 pins are respectively connected with the 8 pins and the 7 pins of the detection chip U3.
The utility model has the advantages that: the utility model discloses a detection circuitry carries out real-time detection to the actual alternating current that inserts and detects, makes data conversion back through converting circuit, through the actual power frequency testing result of transmission interface output, need not to use all the other instrument and equipment to carry out power frequency detection, and is very convenient, realizes real-time power frequency detection when providing reliable stable work power for the camera, provides basic data information for the automatic power frequency adjustment of camera.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic circuit diagram of the present invention;
fig. 2 is a waveform diagram illustrating the detection principle of the detection circuit.
Detailed Description
Referring to fig. 1, a power supply for a camera capable of power frequency detection includes a power circuit, a detection circuit, a conversion circuit and a transmission interface (labeled as J1 in fig. 1); the input end of the detection circuit is electrically connected with the power supply circuit, and the output end of the detection circuit is electrically connected with the transmission interface through the conversion circuit; the output end of the power circuit is electrically connected with the transmission interface, the current power taking end of the camera uses a 220V/5V cable plug, the USB is used as the transmission interface to be connected to the camera, in combination with the figure 1, 1 pin of the transmission interface is connected with the power circuit to output 5V working voltage, 2 and 3 pins of the transmission interface are signal pins, after the detection circuit detects and the conversion circuit, the transmission interface can output an actual power frequency detection result, other instruments and equipment are not needed to be used for power frequency detection, the operation is very convenient, real-time power frequency detection can be realized while a stable working power supply is provided for the camera, and basic data information is provided for automatic power frequency adjustment of the camera.
The power supply circuit comprises a transformer T1, a rectifier bridge D1, a capacitor C2, a capacitor C3, a voltage stabilizing chip U1, a capacitor C1 and a capacitor C4; the 1 and 2 terminal pins of the transformer T1 are respectively connected with a live wire and a zero wire, and the 3 and 4 terminal pins are respectively connected with a positive phase input end and a negative phase input end of the rectifier bridge D1; the negative electrode output end of the rectifier bridge D1 is grounded, the positive electrode output end is divided into three paths, the first path and the second path are grounded after passing through the capacitor C2 and the capacitor C3 respectively, and the third path is connected with the pin 1 of the voltage stabilizing chip U1; the 2 pins of the voltage stabilizing chip U1 are grounded, the 3 pins are divided into three paths, the first path and the second path are grounded through the capacitor C1 and the capacitor C4 respectively, the third path is connected with the 1 pin of the transmission interface, the model of the voltage stabilizing chip U1 is 7805, the capacitor C2, the capacitor C3, the capacitor C1 and the capacitor C4 are filter capacitors, so that the working voltage output by the power supply circuit is more stable, a node between the capacitor C1 and the voltage stabilizing chip U1 outputs 5V working voltage, and the continuous 5V voltage mentioned in the specification is provided by the node.
The detection circuit comprises a photoelectric coupler U2, a photoelectric coupler U5, a resistor R1, a resistor R3, a resistor R2, a resistor R4, a capacitor C5 and a detection chip U3; the 1 pin of the photoelectric coupler U2 is divided into two paths after passing through the resistor R1, one path is connected with the node of the positive phase input end of the rectifier bridge D1 and the 3 pin of the transformer T1, and the other path is connected with the 2 pin of the photoelectric coupler U5; the 2 pins of the photoelectric coupler U2 are divided into two paths, one path is connected with the node of the negative phase input end of the rectifier bridge D1 and the 4 pin of the transformer T1, and the other path is connected with the 1 pin of the photoelectric coupler U5 through the resistor R3; the 4 pins of the photoelectric coupler U2 are grounded, the 3 pins are divided into two paths, one path is connected with 5V voltage through the resistor R2, and the other path is connected with the 1 pin of the detection chip U3; the 4 pins of the photoelectric coupler U5 are grounded, the 3 pins are divided into two paths, one path is connected with 5V voltage through the resistor R4, and the other path is connected with the 2 pins of the detection chip U3; one end of the capacitor C5 is grounded, the other end of the capacitor C5 is divided into two paths, one path is connected with 5V voltage, the other path is connected with 6 pins of the detection chip U3, the type of the detection chip U3 is STC8G1K08, the photoelectric coupler U2 and the photoelectric coupler U5 can trigger the detection chip U3 and play an effective isolation role at the same time, the influence of the variable voltage output by the transformer T1 on a detection circuit is avoided, and the detection structure is more reliable while the detection chip U3 is protected; the output waveforms of the transformer T1, the photoelectric coupler U2, the photoelectric coupler U5 and the detection chip U3 are shown in FIG. 2, the detection chip U3 synthesizes the waveforms to operate, then the power frequency is obtained, and the real-time power frequency is transmitted to the camera after the power frequency is output to the transmission interface through the conversion circuit serial port.
The conversion circuit comprises a conversion chip U4, a crystal oscillator Y1, a capacitor C6, a capacitor C7, a capacitor C8 and a capacitor C9; pins 9 and 10 of the detection chip U3 are respectively connected with pins 3 and 4 of the conversion chip U4; one end of the capacitor C6 is grounded, the other end of the capacitor C6 is divided into three paths, one path is connected with 5V voltage, and the second path and the third path are respectively connected with pins 13 and 20 of the conversion chip U4; one end of the capacitor C7 is grounded, and the other end of the capacitor C7 is connected with a 6 pin of the conversion chip U4; pins 2 and 4 of the crystal oscillator Y1 are grounded, pin 1 is divided into two paths, one path is connected with pin 9 of the conversion chip U4, the other path is grounded through the capacitor C9, pin 3 of the crystal oscillator Y1 is divided into two paths, one path is connected with pin 10 of the conversion chip U4, and the other path is grounded through the capacitor C8; the 4 pins of the transmission interface are grounded, the 2 pins and the 3 pins are respectively connected with the 8 pins and the 7 pins of the detection chip U3, and the model of the conversion chip U4 is CH 341T.
The above embodiments are not intended to limit the scope of the present invention, and those skilled in the art can make modifications and variations equivalent without departing from the overall concept of the present invention.
Claims (4)
1. A camera power supply capable of power frequency detection is characterized by comprising a power circuit, a detection circuit, a conversion circuit and a transmission interface; the input end of the detection circuit is electrically connected with the power supply circuit, and the output end of the detection circuit is electrically connected with the transmission interface through the conversion circuit; and the output end of the power supply circuit is electrically connected with the transmission interface.
2. The camera power supply capable of power frequency detection according to claim 1, wherein the power circuit comprises a transformer T1, a rectifier bridge D1, a capacitor C2, a capacitor C3, a voltage stabilizing chip U1, a capacitor C1 and a capacitor C4; the 1 and 2 terminal pins of the transformer T1 are respectively connected with a live wire and a zero wire, and the 3 and 4 terminal pins are respectively connected with a positive phase input end and a negative phase input end of the rectifier bridge D1; the negative electrode output end of the rectifier bridge D1 is grounded, the positive electrode output end is divided into three paths, the first path and the second path are grounded after passing through the capacitor C2 and the capacitor C3 respectively, and the third path is connected with the pin 1 of the voltage stabilizing chip U1; the 2 pins of the voltage stabilizing chip U1 are grounded, the 3 pins are divided into three paths, the first path and the second path are grounded through the capacitor C1 and the capacitor C4, and the third path is connected with the 1 pin of the transmission interface.
3. The camera power supply capable of power frequency detection according to claim 2, characterized in that the detection circuit comprises a photoelectric coupler U2, a photoelectric coupler U5, a resistor R1, a resistor R3, a resistor R2, a resistor R4, a capacitor C5 and a detection chip U3; the 1 pin of the photoelectric coupler U2 is divided into two paths after passing through the resistor R1, one path is connected with the node of the positive phase input end of the rectifier bridge D1 and the 3 pin of the transformer T1, and the other path is connected with the 2 pin of the photoelectric coupler U5; the 2 pins of the photoelectric coupler U2 are divided into two paths, one path is connected with the node of the negative phase input end of the rectifier bridge D1 and the 4 pin of the transformer T1, and the other path is connected with the 1 pin of the photoelectric coupler U5 through the resistor R3; the 4 pins of the photoelectric coupler U2 are grounded, the 3 pins are divided into two paths, one path is connected with 5V voltage through the resistor R2, and the other path is connected with the 1 pin of the detection chip U3; the 4 pins of the photoelectric coupler U5 are grounded, the 3 pins are divided into two paths, one path is connected with 5V voltage through the resistor R4, and the other path is connected with the 2 pins of the detection chip U3; one end of the capacitor C5 is grounded, the other end of the capacitor C5 is divided into two paths, one path is connected with 5V voltage, and the other path is connected with the 6 pin of the detection chip U3.
4. The power frequency detectable camera power supply according to claim 3, wherein the conversion circuit comprises a conversion chip U4, a crystal oscillator Y1, a capacitor C6, a capacitor C7, a capacitor C8 and a capacitor C9; pins 9 and 10 of the detection chip U3 are respectively connected with pins 3 and 4 of the conversion chip U4; one end of the capacitor C6 is grounded, the other end of the capacitor C6 is divided into three paths, one path is connected with 5V voltage, and the second path and the third path are respectively connected with pins 13 and 20 of the conversion chip U4; one end of the capacitor C7 is grounded, and the other end of the capacitor C7 is connected with a 6 pin of the conversion chip U4; pins 2 and 4 of the crystal oscillator Y1 are grounded, pin 1 is divided into two paths, one path is connected with pin 9 of the conversion chip U4, the other path is grounded through the capacitor C9, pin 3 of the crystal oscillator Y1 is divided into two paths, one path is connected with pin 10 of the conversion chip U4, and the other path is grounded through the capacitor C8; the 4 pins of the transmission interface are grounded, and the 2 pins and the 3 pins are respectively connected with the 8 pins and the 7 pins of the detection chip U3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120817676.5U CN214674890U (en) | 2021-04-21 | 2021-04-21 | Camera power supply capable of power frequency detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120817676.5U CN214674890U (en) | 2021-04-21 | 2021-04-21 | Camera power supply capable of power frequency detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214674890U true CN214674890U (en) | 2021-11-09 |
Family
ID=78464969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120817676.5U Active CN214674890U (en) | 2021-04-21 | 2021-04-21 | Camera power supply capable of power frequency detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214674890U (en) |
-
2021
- 2021-04-21 CN CN202120817676.5U patent/CN214674890U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101246198B (en) | Electric network power-fail detection circuit | |
| CN204731307U (en) | AC voltage detection circuit | |
| CN214674890U (en) | Camera power supply capable of power frequency detection | |
| CN205246757U (en) | Electric energy meter signal acquisition metering modules | |
| CN204349567U (en) | The identification circuit of a kind of internal combustion engine generator and civil power | |
| CN208026785U (en) | A kind of multimeter | |
| CN109669895A (en) | The level shifting circuit of RS-232 interface and RS-485 interface | |
| CN105629110A (en) | Electric performance recognition system for electric power system | |
| CN209894959U (en) | High-common-mode-interference-resistance small-signal isolation sampling conditioning circuit of electronic transformer | |
| CN210323147U (en) | Three-phase electric energy meter | |
| CN205027852U (en) | Electric wire breakpoint detector | |
| CN209417136U (en) | A kind of measurement transient voltage circuit | |
| CN111707967A (en) | Alternating current leakage voltage detection device | |
| CN207281197U (en) | A kind of winding displacement tester | |
| CN213521403U (en) | Host device of low-voltage transformer area topology rapid identification instrument | |
| CN211148774U (en) | Novel alternating current zero detection circuit | |
| CN210807753U (en) | Acquisition circuit of BUCK circuit output parameter | |
| CN208939925U (en) | A kind of analog to digital conversion circuit with linear isolation characteristic | |
| CN210199218U (en) | Multifunctional electric energy quality analyzer | |
| CN210328092U (en) | Electric quantity and dimming control two-in-one circuit | |
| CN209383375U (en) | A kind of pulse-detecting circuit of urea for vehicle charging machine | |
| CN203688663U (en) | Power collection system | |
| CN209102229U (en) | A kind of thermocouple temperature measurement instrument | |
| CN210351115U (en) | Switching value acquisition circuit supporting square wave input | |
| CN205263645U (en) | Fault detection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |