CN204649840U - A kind of Portable A. C frequency collection device - Google Patents
A kind of Portable A. C frequency collection device Download PDFInfo
- Publication number
- CN204649840U CN204649840U CN201520341337.9U CN201520341337U CN204649840U CN 204649840 U CN204649840 U CN 204649840U CN 201520341337 U CN201520341337 U CN 201520341337U CN 204649840 U CN204649840 U CN 204649840U
- Authority
- CN
- China
- Prior art keywords
- chip
- rectifier bridge
- pin
- connects
- display module
- 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.)
- Expired - Fee Related
Links
- 238000004804 winding Methods 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses a kind of Portable A. C frequency collection device, comprise transformer W, rectifier bridge T, chip IC 1, potentiometer RP1 and display module, the both sides of the winding N1 of described transformer W are connected to the two ends of alternating current U1 to be measured, the both sides of the winding N2 of transformer W are connected to the port one of rectifier bridge T and the port 3 of rectifier bridge T, the port 2 contact resistance R1 of rectifier bridge T.The utility model alternating-current frequency measuring instrument circuit structure is simple, volume is little, and the components and parts used are cheap, therefore cost of manufacture is greatly reduced, by 555 time base circuit composition single-shot trigger circuits, the frequency of operation of electric system is converted to the jump frequency of output voltage low and high level, thus accurately measure, and carry out numeral by 7 segment numeral pipes, therefore have easy to carry, measure precisely and the advantage of convenient reading.
Description
Technical field
The utility model relates to a kind of measuring instrument, specifically a kind of Portable A. C frequency collection device.
Background technology
In Operation of Electric Systems, utilize the various interference in the random variation of electric load and the external world can affect the stable of electric system, cause the fluctuation of system voltage and frequency, thus affect the quality of electric energy, collapse of voltage can be caused time serious, electric power system is made to occur accident, therefore the collection of ac frequency and measurement are seemed particularly important, but the most complex structure of frequency collection device in the market, volume is large, and is mostly indicated by pointer header, and reading error is larger, thus make troubles to user, affect productive life efficiency.
Utility model content
The purpose of this utility model is to provide a kind of Portable A. C frequency collection device, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of Portable A. C frequency collection device, comprises transformer W, rectifier bridge T, chip IC 1, potentiometer RP1 and display module, it is characterized in that, the both sides of the winding N1 of described transformer W are connected to the two ends of alternating current U1 to be measured, the both sides of the winding N2 of transformer W are connected to a voltage input end mouth 1 of rectifier bridge T and another voltage input end mouth 3 of rectifier bridge T, the voltage output end mouth 2 contact resistance R1 of rectifier bridge T, the other end of resistance R1 connects potentiometer RP1, the other end of potentiometer RP1 connects the anode of diode D1, resistance R2, the anode of diode D2 and the grounding ports 4 of rectifier bridge T, the other end contact resistance R3 of resistance R2, switch S 1, the port one of display module, the pin 4 of chip IC 1 and the pin 8 of chip IC 1, the sliding end of potentiometer RP1 connects the negative electrode of diode D1 and the pin 2 of chip IC 1, the other end of resistance R3 connects the pin 6 of chip IC 1, the pin 5 of chip IC 1 connects electric capacity C1, the negative electrode of diode D2 connects the other end of electric capacity C1, the negative pole of power supply E, the port 3 of display module and the pin 1 of chip IC 1, the pin 3 of chip IC 1 connects the port 2 of display module, the other end of switch S 1 connects the positive pole of power supply E, the model of chip IC 1 is NE555.
As preferred version of the present utility model: described power supply E is 2 joint dry cells.
As preferred version of the present utility model: described display module is made up of 27 segment numeral pipes.
Compared with prior art, the beneficial effects of the utility model are: the utility model ac frequency collector circuit structure is simple, volume is little, and the components and parts used are cheap, therefore cost of manufacture is greatly reduced, by 555 time base circuit composition single-shot trigger circuits, the frequency of operation of electric system is converted to the jump frequency of output voltage low and high level, thus accurately measure, and carry out numeral by 7 segment numeral pipes, therefore have easy to carry, measure precisely and the advantage of convenient reading.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of Portable A. C frequency collection device.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, comprise transformer W, rectifier bridge T, chip IC 1, potentiometer RP1 and display module, it is characterized in that, the both sides of the winding N1 of described transformer W are connected to the two ends of alternating current U1 to be measured, the both sides of the winding N2 of transformer W are connected to a voltage input end mouth 1 of rectifier bridge T and another voltage input end mouth 3 of rectifier bridge T, the voltage output end mouth 2 contact resistance R1 of rectifier bridge T, the other end of resistance R1 connects potentiometer RP1, the other end of potentiometer RP1 connects the anode of diode D1, resistance R2, the anode of diode D2 and the grounding ports 4 of rectifier bridge T, the other end contact resistance R3 of resistance R2, switch S 1, the port one of display module, the pin 4 of chip IC 1 and the pin 8 of chip IC 1, the sliding end of potentiometer RP1 connects the negative electrode of diode D1 and the pin 2 of chip IC 1, the other end of resistance R3 connects the pin 6 of chip IC 1, the pin 5 of chip IC 1 connects electric capacity C1, the negative electrode of diode D2 connects the other end of electric capacity C1, the negative pole of power supply E, the port 3 of display module and the pin 1 of chip IC 1, the pin 3 of chip IC 1 connects the port 2 of display module, the other end of switch S 1 connects the positive pole of power supply E, the model of chip IC 1 is NE555.
as preferred version of the present utility model: described power supply E is 2 joint dry cells.
As preferred version of the present utility model: described display module is made up of 27 segment numeral pipes.
Principle of work of the present utility model is: the rated voltage of power supply E is V, this circuit utilizes collection battle array voltage 1/3V and 2/3V of two voltage comparators in 555th century circuit, control 2 pin and the 6 pin level of 555, change the state exported, when the synchronizing voltage current potential that 2 pin come is lower than 1/3V, 3 pin of 555 export high level, when the synchronizing voltage current potential that 2 pin come is higher than 1/3V, the 3 pin output low levels of 555, namely the every zero passage of alternating current once, 3 pin of 555 export a high level, display module then counts once, therefore circuit can measure the frequency of alternating current accurately and conveniently.Circuit structure is simple, volume is little, and the components and parts used are cheap, therefore cost of manufacture is greatly reduced, by 555 time base circuit composition single-shot trigger circuits, the frequency of operation of electric system is converted to the jump frequency of output voltage low and high level, thus accurately measure, and carry out numeral by 7 segment numeral pipes, therefore have easy to carry, measure precisely and the advantage of convenient reading.
Claims (3)
1. a Portable A. C frequency collection device, comprises transformer W, rectifier bridge T, chip IC 1, potentiometer RP1 and display module, it is characterized in that, the both sides of the winding N1 of described transformer W are connected to the two ends of alternating current U1 to be measured, the both sides of the winding N2 of transformer W are connected to a voltage input end mouth 1 of rectifier bridge T and another voltage input end mouth 3 of rectifier bridge T, the voltage output end mouth 2 contact resistance R1 of rectifier bridge T, the other end of resistance R1 connects potentiometer RP1, the other end of potentiometer RP1 connects the anode of diode D1, resistance R2, the anode of diode D2 and the grounding ports 4 of rectifier bridge T, the other end contact resistance R3 of resistance R2, switch S 1, the port one of display module, the pin 4 of chip IC 1 and the pin 8 of chip IC 1, the sliding end of potentiometer RP1 connects the negative electrode of diode D1 and the pin 2 of chip IC 1, the other end of resistance R3 connects the pin 6 of chip IC 1, the pin 5 of chip IC 1 connects electric capacity C1, the negative electrode of diode D2 connects the other end of electric capacity C1, the negative pole of power supply E, the port 3 of display module and the pin 1 of chip IC 1, the pin 3 of chip IC 1 connects the port 2 of display module, the other end of switch S 1 connects the positive pole of power supply E, the model of chip IC 1 is NE555.
2. according to a kind of Portable A. C frequency collection device according to claim 1, it is characterized in that, described power supply E is 2 joint dry cells.
3. according to a kind of Portable A. C frequency collection device according to claim 1, it is characterized in that, described display module is made up of 27 segment numeral pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520341337.9U CN204649840U (en) | 2015-05-25 | 2015-05-25 | A kind of Portable A. C frequency collection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520341337.9U CN204649840U (en) | 2015-05-25 | 2015-05-25 | A kind of Portable A. C frequency collection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204649840U true CN204649840U (en) | 2015-09-16 |
Family
ID=54102576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520341337.9U Expired - Fee Related CN204649840U (en) | 2015-05-25 | 2015-05-25 | A kind of Portable A. C frequency collection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204649840U (en) |
-
2015
- 2015-05-25 CN CN201520341337.9U patent/CN204649840U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201955387U (en) | Zero-crossing detecting circuit with low power consumption for carrier wave communication | |
| CN203133226U (en) | Polarity testing instrument for current transformer | |
| CN204649840U (en) | A kind of Portable A. C frequency collection device | |
| CN205015399U (en) | Battery connection piece contact impedance measuring circuit | |
| CN204333983U (en) | Wireless temperature-measuring sensor electric supply installation | |
| CN205051407U (en) | Lithium batteries protects controller | |
| CN203933053U (en) | New charger | |
| CN204481563U (en) | A kind of quick converter circuitry of power of powering for microcomputer | |
| CN204694371U (en) | A kind of temperature test circuit | |
| CN203365525U (en) | Power grid voltage detection device | |
| CN204556774U (en) | A kind of electric system cycle measuring instrument | |
| CN205562731U (en) | Diode breakdown voltage test circuit | |
| CN205051412U (en) | Adjustable charger of lithium cell | |
| CN204142928U (en) | A kind of battery electric quantity measuring instrument | |
| CN204731340U (en) | A kind of portable Intelligent terminal for Internet of things equipment failure intelligent detecting instrument | |
| CN205228517U (en) | Temperature and model detection circuitry of battery package | |
| CN204359845U (en) | DC welder output current voltage measuring apparatus | |
| CN202977652U (en) | Electric quantity indication circuit of battery | |
| CN203405533U (en) | Pollution flashover monitoring device | |
| CN202119857U (en) | Line inspection device of measurement meter | |
| CN203616925U (en) | Solar cell characteristic and application experimental instrument | |
| CN203287428U (en) | Direct current voltmeter | |
| CN202748332U (en) | Portable soil humidity testing device | |
| CN203084062U (en) | Current tester specially used in photovoltaic junction box | |
| CN204595169U (en) | A kind of bidirectional thyristor detector circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150916 Termination date: 20160525 |