CN104535823A - Pointer multimeter adapter for detecting high-frequency signals - Google Patents
Pointer multimeter adapter for detecting high-frequency signals Download PDFInfo
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- CN104535823A CN104535823A CN201510026036.1A CN201510026036A CN104535823A CN 104535823 A CN104535823 A CN 104535823A CN 201510026036 A CN201510026036 A CN 201510026036A CN 104535823 A CN104535823 A CN 104535823A
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- electric capacity
- frequency selective
- frequency
- selective switch
- multimeter
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Abstract
The invention discloses a pointer multimeter adapter for detecting high-frequency signals. The adapter is characterized by comprising a frequency selecting circuit, a voltage doubling detection and filter circuit and a detection meter, wherein a frequency selecting switch K1 is a double-pole double-throw switch, and the detection meter is a 500 type multimeter. The pointer multimeter adapter for detecting the high-frequency signals, disclosed by the invention, is provided with a two-frequency selecting switch, a 2.5V voltage shift of a frequently-used 500 type multimeter is used for quantitative indication, and the adapter can be used for measuring the intensity of the high-frequency signals of electronic equipment, can be used for measuring the voltage of the high-frequency signals of less than 30MHz, and can be matched with a multimeter for measuring the high-frequency oscillation voltage of radio sets, televisions, wireless control equipment and the like. The measurement result of the high-frequency signals can meet general technical requirements, and the adapter has the advantages of simple circuit structure, relatively high measurement sensibility, stable working performance, low manufacturing cost and the like.
Description
Technical field
The invention belongs to high frequency testing technical field, is detect high-frequency signal Mk about a kind of pointer multimeter.
Background technology
Pointer multimeter measures alternating current internal circuit, it relates to some non-pure resistance elements, for example: the pointer coil of pointer gauge, so the calibration of pointer multimeter, what to use the alternating current of certain frequency and certain waveform as standard calibration, the reason of Here it is universal meter more adequately the measures sine wave alternating current of 50Hz, the signal voltage of below audio frequency measured at most by common multimeter, exceed this frequency too many, reading error will be larger.If measure the alternating current of its higher frequency and waveform with it, then how inaccurate reading is.
Instrument for measuring high-frequency signal strength has a variety of, although specialty is for measuring the instrument function admirable of high-frequency signal strength on market, there is price high, amateur unit or personnel are difficult to the defects such as acceptance.In order to make up and overcome these problems, develop that a kind of circuit structure is succinct, cost of manufacture is low, stable work in work and the high-frequency signal strength measurement mechanism of practicality is necessary.
Pointer multimeter of the present invention detects high-frequency signal Mk and is provided with two grades of frequency selective switchs, the 500 type multimeter 2.5V voltage gears that choosing is commonly used are as quantitative instruction, do not need to do any change to 500 type multimeters, can be used for the intensity size measuring electronic equipment high-frequency signal, can measure the voltage of below 30MHz high-frequency signal, this attachment device can coordinate multimeter to measure the high-frequency oscillation voltage of the equipment such as radio, televisor, wireless remote control.The measurement result of high-frequency signal can meet general specification, and it has the advantages such as circuit structure is simple, measurement sensistivity is higher, stable work in work, cost of manufacture are low.
Below describe in detail pointer multimeter of the present invention detect high-frequency signal Mk necessity involved in manufacturing process, guardian technique.
Summary of the invention
Goal of the invention and beneficial effect: the instrument for measuring high-frequency signal strength has a variety of, although specialty is for measuring the instrument function admirable of high-frequency signal strength on market, there is price high, amateur unit or personnel are difficult to the defects such as acceptance.In order to make up and overcome these problems, develop that a kind of circuit structure is succinct, cost of manufacture is low, stable work in work and the high-frequency signal strength measurement mechanism of practicality is necessary.
Pointer multimeter of the present invention detects high-frequency signal Mk and is provided with two grades of frequency selective switchs, the 500 type multimeter 2.5V voltage gears that choosing is commonly used are as quantitative instruction, do not need to do any change to 500 type multimeters, can be used for the intensity size measuring electronic equipment high-frequency signal, can measure the voltage of below 30MHz high-frequency signal, this attachment device can coordinate multimeter to measure the high-frequency oscillation voltage of the equipment such as radio, televisor, wireless remote control.The measurement result of high-frequency signal can meet general specification, and it has the advantages such as circuit structure is simple, measurement sensistivity is higher, stable work in work, cost of manufacture are low.
Circuit working principle: pointer multimeter of the present invention detects high-frequency signal Mk, after signal probe TX detects high-frequency signal, high-frequency signal, by multiplication of voltage detection and capacitor filtering, is become DC voltage and delivers to pointer multimeter DC voltage shift by faint HF voltage.Pointer multimeter of the present invention detects high-frequency signal Mk and is provided with two grades of frequency selective switchs, and the 500 type multimeter 2.5V voltage gears that choosing is commonly used, as quantitative instruction, stir the frequency measurement scope that frequency selective switch K1 can change high-frequency signal.When measuring high-frequency signal, the magnitude of voltage of 500 type multimeter pointer instructions is less, illustrates that the intensity of tested high-frequency signal is less.
Technical scheme: pointer multimeter detects high-frequency signal Mk, and it comprises frequency selective network, multiplication of voltage detection and filtering circuit, detection gauge outfit, it is characterized in that:
Frequency selective network: it is made up of signal probe TX, electric capacity C1, electric capacity C2 and frequency selective switch K1, frequency selective switch K1 selects double-point double-throw switch, signal probe TX mono-termination capacitor C1 one end and electric capacity C2 one end, 1st pin of another termination frequency selective switch of electric capacity C1 K1-1,2nd pin of another termination frequency selective switch of electric capacity C2 K1-1, the 3rd pin of frequency selective switch K1-1 connects multiplication of voltage detection and filtering circuit;
Multiplication of voltage detection and filtering circuit: it is by germanium diode D1, germanium diode D2, electric capacity C3 and electric capacity C4 and frequency selective switch K1-2 forms, the model that germanium diode D1 and germanium diode D2 selects is 2AK20, the negative pole of germanium diode D1 and the positive pole of germanium diode D2 connect the 3rd pin of frequency selective switch K1-1, the positive pole connection circuit ground GND of germanium diode D1, 1st pin of electric capacity C3 mono-termination frequency selective switch K1-2, 2nd pin of electric capacity C4 mono-termination frequency selective switch K1-2, the electric capacity C3 other end and electric capacity C4 other end connection circuit ground GND, 3rd pin of frequency selective switch K1-2 connects the negative pole of germanium diode D2 and the black meter pen jack of 500 type multimeters, the red test pencil jack connection circuit ground GND of 500 type multimeters,
Detect gauge outfit and use 1 piece of 500 type multimeter.
Accompanying drawing explanation
Accompanying drawing 1 the invention provides the embodiment circuit working schematic diagram that a pointer multimeter detects high-frequency signal Mk; 3rd pin of frequency selective switch K1-1 is lever arm; The lever arm of the frequency selective switch K1 on accompanying drawing 1 is placed in high frequency measurement position.
Embodiment
High-frequency signal Mk circuit working schematic diagram and accompanying drawing explanation is detected according to the pointer multimeter shown in accompanying drawing 1, and according to annexation between components and parts in each several part circuit described in summary of the invention, and components and parts technical parameter described in embodiment requires and circuit production main points are carried out enforcement and can be realized the present invention, is further described correlation technique of the present invention below in conjunction with embodiment.
Its technical parameter of components and parts and selection requirement
D1, D2 are germanium diode, and the model selected is 2AK20;
C1, C3 are ceramic disc capacitor, the magnetic medium electric capacity selected, and its capacity is 1000PF;
C2, C4 are electric capacity of the dacron, and its capacity is 0.22 μ F, withstand voltage for 63V;
K1 is frequency selective switch, selects double-point double-throw switch;
Detect gauge outfit and use 1 piece of 500 type multimeter.
Circuit production main points, circuit debugging and using method
Signal probe TX line adopts shielding line, and unsuitable oversize, and shell should use metal material;
The circuit structure detecting high-frequency signal Mk because of pointer multimeter is fairly simple, comparison is easy, as long as the electronic devices and components performance generally selected is intact, and the components and parts annexation to specifications in accompanying drawing 1 is welded, physical connection line and welding quality are through carefully checking correctly, and circuit of the present invention does not substantially need to carry out any debugging and can normally work;
According to the frequency of measured signal, adjustment selected frequency selects K switch 1 position;
When measuring high-frequency signal, the magnitude of voltage of 500 type multimeter pointer instructions is less, illustrates that the intensity of the high-frequency signal of tested high-frequency signal is then less;
Proper use of pointer multimeter detects the size of high-frequency signal Mk and the tested high-frequency signal of correct interpretation, needs certain practice process, needs constantly to accumulate experience.
Circuit components layout of the present invention, circuit structure design, its shape and size etc. of outward appearance are not all gordian techniquies of the present invention; because not affecting specific implementation process of the present invention; neither the technology contents of application claims protection, therefore not illustrate one by one in the description.
Claims (1)
1. pointer multimeter detects a high-frequency signal Mk, and it comprises frequency selective network, multiplication of voltage detection and filtering circuit, detection gauge outfit, it is characterized in that:
Described frequency selective network is made up of signal probe TX, electric capacity C1, electric capacity C2 and frequency selective switch K1, frequency selective switch K1 selects double-point double-throw switch, signal probe TX mono-termination capacitor C1 one end and electric capacity C2 one end, 1st pin of another termination frequency selective switch of electric capacity C1 K1-1,2nd pin of another termination frequency selective switch of electric capacity C2 K1-1, the 3rd pin of frequency selective switch K1-1 connects multiplication of voltage detection and filtering circuit;
Described multiplication of voltage detection and filtering circuit are by germanium diode D1, germanium diode D2, electric capacity C3 and electric capacity C4 and frequency selective switch K1-2 forms, the model that germanium diode D1 and germanium diode D2 selects is 2AK20, the negative pole of germanium diode D1 and the positive pole of germanium diode D2 connect the 3rd pin of frequency selective switch K1-1, the positive pole connection circuit ground GND of germanium diode D1, 1st pin of electric capacity C3 mono-termination frequency selective switch K1-2, 2nd pin of electric capacity C4 mono-termination frequency selective switch K1-2, the electric capacity C3 other end and electric capacity C4 other end connection circuit ground GND, 3rd pin of frequency selective switch K1-2 connects the negative pole of germanium diode D2 and the black meter pen jack of 500 type multimeters, the red test pencil jack connection circuit ground GND of 500 type multimeters,
Described detection gauge outfit uses 1 piece of 500 type multimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510026036.1A CN104535823A (en) | 2015-01-19 | 2015-01-19 | Pointer multimeter adapter for detecting high-frequency signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510026036.1A CN104535823A (en) | 2015-01-19 | 2015-01-19 | Pointer multimeter adapter for detecting high-frequency signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104535823A true CN104535823A (en) | 2015-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510026036.1A Pending CN104535823A (en) | 2015-01-19 | 2015-01-19 | Pointer multimeter adapter for detecting high-frequency signals |
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| Country | Link |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2196308Y (en) * | 1994-02-24 | 1995-05-03 | 张东 | Portable pointer universal avometer with function of measuring frequency |
| CN2319814Y (en) * | 1998-03-03 | 1999-05-19 | 苏重清 | Multifunctional pointer multimeter |
| CN2655566Y (en) * | 2003-12-02 | 2004-11-10 | 钟少雄 | Detector |
| US20060139024A1 (en) * | 2004-03-15 | 2006-06-29 | Newcombe Charles B | Multimeter with filtered measurement mode |
| CN204330863U (en) * | 2015-01-19 | 2015-05-13 | 吴圣铎 | Pointer multimeter detects high-frequency signal Mk |
-
2015
- 2015-01-19 CN CN201510026036.1A patent/CN104535823A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2196308Y (en) * | 1994-02-24 | 1995-05-03 | 张东 | Portable pointer universal avometer with function of measuring frequency |
| CN2319814Y (en) * | 1998-03-03 | 1999-05-19 | 苏重清 | Multifunctional pointer multimeter |
| CN2655566Y (en) * | 2003-12-02 | 2004-11-10 | 钟少雄 | Detector |
| US20060139024A1 (en) * | 2004-03-15 | 2006-06-29 | Newcombe Charles B | Multimeter with filtered measurement mode |
| CN204330863U (en) * | 2015-01-19 | 2015-05-13 | 吴圣铎 | Pointer multimeter detects high-frequency signal Mk |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150422 |
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| WD01 | Invention patent application deemed withdrawn after publication |