CN2591629Y - Low frequency time code signal field strength meter - Google Patents
Low frequency time code signal field strength meter Download PDFInfo
- Publication number
- CN2591629Y CN2591629Y CN 02259029 CN02259029U CN2591629Y CN 2591629 Y CN2591629 Y CN 2591629Y CN 02259029 CN02259029 CN 02259029 CN 02259029 U CN02259029 U CN 02259029U CN 2591629 Y CN2591629 Y CN 2591629Y
- Authority
- CN
- China
- Prior art keywords
- pin
- circuit
- integrated circuit
- low
- frequency time
- 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
Images
Landscapes
- Circuits Of Receivers In General (AREA)
Abstract
The utility model relates to a low frequency time code signal field strength device, which comprises a low-frequency time code receiving circuit and a control circuit, wherein the control circuit is used for controlling a whole machine, and the output end of the low-frequency time code receiving circuit is connected with the control circuit. The utility model adopts single frequency reception and liquid crystal display, the data and the positioning data which are measured for a long time are automatically recorded. The utility model has the advantages of narrow bandwidth, low energy consumption, strong anti-interference ability, high measuring precision, light weight, flexible and simple operation, etc. Human errors and data reading troubles brought by a pointer instrument are avoided.
Description
Technology neck field
The utility model belongs to the telecommunication technology field, is specifically related to the lf time-code signal field intensity meter.
Background technology
RR7 type one interference field strength measuring instrument by Beijing No.2 Factory of Radio Instruments's production, it is pointer that instrument shows, mainly there are shortcomings such as volume is big, Heavy Weight, no measurement data memory function in this instrument, and the position of measurement point and time can't accurately obtain, measure by manual operation, extremely inconvenient.
Summary of the invention
Technical problem to be solved in the utility model and solve the technical scheme that its technical matters adopts and be: the control circuit that it is drawn together the low-frequency time-code receiving circuit and is used for complete machine is controlled, the output terminal connection control circuit of low-frequency time-code receiving circuit.
Low-frequency time-code receiving circuit of the present utility model comprises receiving antenna, comprise the pre-amplification circuit that is connected with the output terminal of antenna, comprise active band-pass filter, the output terminal of the input termination pre-amplification circuit of this circuit, it also comprises gain adjustable amplifier, and the input end of this circuit is connected to the output terminal connection control circuit of source bandpass filter.Control circuit of the present utility model comprises: analog/digital converter, the output terminal of input termination low-frequency time-code connection circuit, output termination programmable parallel interface.It comprises an one-chip computer that complete machine is controlled.It also comprises programmable parallel interface, nonvolatile memory, code translator, one-chip computer is by bus interface analog/digital converter, programmable parallel interface, nonvolatile memory, code translator, and nonvolatile memory is by bus interface programmable parallel interface, code translator.
The utility model adopts single-frequency to receive, liquid crystal display, can write down the data and the locator data of long-time measurement automatically, have narrow bandwidth, energy consumption is low, antijamming capability is strong, measuring accuracy is high, in light weight, advantage, personal error and the reading trouble of having avoided the pointer instrument to bring such as flexible operation is easy.
Description of drawings
Fig. 1 is an electrical principle block scheme of the present utility model.
Fig. 2 is the electronic circuit schematic diagram of low-frequency time-code receiving circuit of the present utility model.
Fig. 3 is the electronic circuit schematic diagram of control circuit of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described, but the utility model is not limited to these embodiment.
Fig. 1 is an electrical principle block scheme of the present utility model, referring to Fig. 1.In Fig. 1, the utility model is to be connected and composed by low-frequency time-code receiving circuit, analog/digital converter, programmable parallel interface, one-chip computer, code translator, nonvolatile memory, and wherein analog/digital converter, programmable parallel interface, one-chip computer, code translator, nonvolatile memory connect into control circuit.
In Fig. 2, the low-frequency time-code receiving circuit of present embodiment is connected and composed by receiving antenna L1, pre-amplification circuit, active band-pass filter, gain adjustable amplifier.
The termination pre-amplification circuit of receiving antenna L1, other end ground connection, fixed capacity C1 and receiving antenna L1 decision resonance frequency.
The pre-amplification circuit of present embodiment is made of integrated circuit U1, integrated circuit U2, R1～R7 connection, and the model of integrated circuit U1 and integrated circuit U2 is LF357.The end, negative input that the positive input of integrated circuit U1 meets receiving antenna L1 is by R1 ground connection and connect output terminal, 4 pin by R2 and connect 12v power cathode, 7 pin and connect 12v positive source, output terminal 6 pin and connect the 3 pin positive inputs of integrated circuit U2 by R3, and the negative input of integrated circuit U2 is by R4 ground connection and connect output terminal, 4 pin by R5 and connect that 12v power cathode, 7 pin connect the 12v positive source, output terminal 6 pin are connected to the source bandpass filter by R6 and R7.
The active band-pass filter of present embodiment is connected and composed by integrated circuit U3, R8～R22, potentiometer W1, and the model of integrated circuit U3 is MAX274.The other end that 2 pin of integrated circuit U3 meet R7 connects 4 pin by R9 and connects 6 pin and connect 11 pin by R9 and R11 by R9 and R10,1 pin connects 3 pin by R8,11 pin connect 9 pin by R13 and connect 7 pin and connect 14 pin by R13 and R15 by R13 and R14,14 pin connect 16 pin by R17 and connect 18 pin and connect 23 pin by R17 and R19 by R17 and R18,13 pin connect 15 pin by R16,23 pin connect 21 pin and connect 19 pin by R21 and R22 by R21,22 pin connect 24 pin by R20,21 pin connect the end of potentiometer W1, and the other end of potentiometer W1 and adjustable end are by R23 ground connection and connect gain adjustable amplifier.
The gain adjustable amplifier of present embodiment is connected and composed by integrated circuit U4, R24, R25, potentiometer W2～potentiometer W4, and the model of integrated circuit U4 is AD625.1 pin of integrated circuit U4 connect the other end of potentiometer W1, a end that 3 pin meet potentiometer W2, the other end that 4 pin meet potentiometer W2, adjustable end that 9 pin meet potentiometer W2 and 12V positive source, 7 pin and 16 pin ground connection, 5 pin by R24 connect the end of 2 pin and potentiometer W4, the other end that 15 pin meet potentiometer W4 and adjustable end and by R25 connect 12 pin, 13 pin connect the end of potentiometer W3, the other end that 14 pin meet potentiometer W3, the negative pole of the adjustable termination 12v power supply of potentiometer W3,10 pin of integrated circuit U4 and 11 pin connection control circuits.
Receiving antenna L1 amplifies the lf time-code signal that receives through pre-amplification circuit, the noise signal that has noise filters clutter through active band-pass filter, and making the low-frequency time-code carrier signal obtain amplifying, the Gain Adjustable amplifying circuit outputs to analog/digital converter after the low-frequency time-code carrier signal of active band-pass filter output is amplified.
In Fig. 3, control circuit of the present utility model is connected into by analog/digital converter, programmable parallel interface, one-chip computer, code translator, nonvolatile memory.The analog/digital converter of present embodiment is connected and composed by integrated circuit U9, integrated circuit U10, integrated circuit U11, R28, potentiometer W5, potentiometer W6, and the model of integrated circuit U9 is that the model of AD1674, integrated circuit U10 is that the model of 74HC04, integrated circuit U11 is 74HC74.Programmable parallel interface is made of integrated circuit U8, and the model of integrated circuit U8 is 82C55.Single-chip microcomputer is connected and composed by integrated circuit U5, R27, C2～C4, oscillator JT, and the model of integrated circuit U5 is AT89C51.Nonvolatile memory is made of integrated circuit U7, and the model of integrated circuit U7 is DCM0256.Code translator is made of integrated circuit U6, and the model of integrated circuit U6 is 74HC373.
Information such as the time of the serial port RDX receiving world locational system receiver output of integrated circuit U5, location deposit integrated circuit U7 in.12 bit data that integrated circuit U8 will gather integrated circuit U9 output output to integrated circuit U5, after the data that integrated circuit U5 will adopt are handled, write integrated circuit U7, then, the digital quantity of the lf time-code signal that collects through after handling and calculating, is shown in screen (LCD).Integrated circuit U6 is a decoding scheme.Integrated circuit U10 and integrated circuit U11 form logical circuit, and the AD conversion end signal of integrated circuit U9 is outputed to the P1.4 mouth of integrated circuit U5, and after integrated circuit U5 received the conversion end signal, control integrated circuit U8 began image data.
Claims (2)
1, a kind of lf time-code signal field intensity meter is characterized in that: the control circuit that it is drawn together the low-frequency time-code receiving circuit and is used for complete machine is controlled, the output terminal connection control circuit of low-frequency time-code receiving circuit.
2, according to the described lf time-code signal field intensity meter of claim 1, it is characterized in that: said low-frequency time-code receiving circuit comprises receiving antenna, comprise the pre-amplification circuit that is connected with the output terminal of antenna, comprise active band-pass filter, the output terminal of the input termination pre-amplification circuit of this circuit, it also comprises gain adjustable amplifier, and the input end of this circuit is connected to the output terminal connection control circuit of source bandpass filter;
Said control circuit comprises:
Analog/digital converter, the output terminal of input termination low-frequency time-code connection circuit, output termination programmable parallel interface;
It comprises an one-chip computer that complete machine is controlled;
It also comprises programmable parallel interface, nonvolatile memory, code translator, one-chip computer is by bus interface analog/digital converter, programmable parallel interface, nonvolatile memory, code translator, and nonvolatile memory is by bus interface programmable parallel interface, code translator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02259029 CN2591629Y (en) | 2002-12-09 | 2002-12-09 | Low frequency time code signal field strength meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02259029 CN2591629Y (en) | 2002-12-09 | 2002-12-09 | Low frequency time code signal field strength meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2591629Y true CN2591629Y (en) | 2003-12-10 |
Family
ID=33726603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02259029 Expired - Fee Related CN2591629Y (en) | 2002-12-09 | 2002-12-09 | Low frequency time code signal field strength meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2591629Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191806B (en) * | 2006-11-29 | 2011-03-30 | 比亚迪股份有限公司 | Apparatus and method for testing automobile electromagnetic sensitivity |
-
2002
- 2002-12-09 CN CN 02259029 patent/CN2591629Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191806B (en) * | 2006-11-29 | 2011-03-30 | 比亚迪股份有限公司 | Apparatus and method for testing automobile electromagnetic sensitivity |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103630736B (en) | Based on the insulator Leakage Current on-Line Monitor Device of MSP430 single-chip microcomputer | |
| CN203595754U (en) | Insulator leakage current on-line monitoring device based on MSP430 single-chip microcomputer | |
| CN112345095A (en) | Portable steel rail thermometer and temperature measuring system thereof | |
| CN102174807A (en) | Ropeless static penetrometer and method for acquiring and processing data | |
| CN2591629Y (en) | Low frequency time code signal field strength meter | |
| CN204255460U (en) | A kind of vehicle GPS ultrasound wave oil mass detector | |
| CN203100773U (en) | Farmland environment information acquisition device | |
| CN201955893U (en) | Temperature and humidity data acquisition management device | |
| CN111609886A (en) | Channel intelligence water gaging terminal based on tall and erect operating system of ann | |
| CN202171868U (en) | ARM9-based data acquisition device for vehicle-mounted sensor | |
| CN201561750U (en) | Farmland working area metering system based on GPS | |
| CN200979479Y (en) | A sulfur hexafluoride leakage monitor | |
| CN203396915U (en) | Generator set fault recording module | |
| CN203433041U (en) | An electric energy meter provided with a communication function | |
| CN104614015A (en) | Portable field environment data comprehensive acquisition and analysis system | |
| CN104748940A (en) | Portable online flow resistance tester | |
| CN2643326Y (en) | Low-frequency time code carrier phase meter | |
| CN201600342U (en) | Intelligent type soil moisture tester | |
| CN105425028A (en) | Microwave power measurer based on FPGA | |
| CN203881456U (en) | Multi-channel temperature remote acquisition and display system | |
| CN201917608U (en) | Locomotive signal tester | |
| CN206362257U (en) | A kind of multifunctional intellectual tape measure | |
| CN202885846U (en) | Intelligent integrated reading device | |
| CN218866117U (en) | Two-dimensional and three-dimensional full-function electric field time sequence acquisition and processing system | |
| CN2839974Y (en) | Eight passage intelligence environment protection monitors |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |