CN203643534U - Precise wire measuring equipment - Google Patents
Precise wire measuring equipment Download PDFInfo
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- CN203643534U CN203643534U CN201320848725.7U CN201320848725U CN203643534U CN 203643534 U CN203643534 U CN 203643534U CN 201320848725 U CN201320848725 U CN 201320848725U CN 203643534 U CN203643534 U CN 203643534U
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Abstract
The utility model relates to precise wire measuring equipment. The precise wire measuring equipment comprises a bus drive, a bus interface, an FPGA, an IO board interface, a level converter, a comparator, an amplifier, a TD input loop, a relay module, a signal source switching circuit, a measuring module, a constant current source module, a constant voltage source module, and an alternating current signal source module, the FPGA, the comparator, the amplifier and the TD input loop are connected in sequence, the FPGA, the bus drive and the IO board interface are connected in sequence, the FPGA is connected with the bus interface, the constant current source module, the constant voltage source module, and the alternating signal source module are connected with the FPGA, the constant current source module, the constant voltage source module, and the alternating current signal source module are connected with the signal source switching circuit, the relay module, the measuring module and the level converter are connected with the signal source switching circuit, and the relay module is connected with the measuring module. Through the measuring module and the relay module, the precise wire measuring equipment realizes input and output of any port, and can realize measurement of short circuits, open circuits, conduction impedance, resistance, capacitance, diodes, point measurement, ACR and the like.
Description
Technical field
The utility model relates to a kind of surveying instrument, particularly a kind of general precision wire measurement mechanism.
Background technology
Wire rod has various model and standard-required, so wire rod, after production completes, must be tested the indices of wire rod.In order to check wire rod whether to meet the needs that use, people will measure the conducting resistance, insulation resistance, electric capacity, AC power (leakage current) of wire rod etc. conventionally.Some wire rod surveying instruments in the market, measurement range and the measure the item of various measurement items are less, as: when test wire rod, can not put measuring resistance, can not put survey conducting resistance, can not survey ACR, can not survey bilateral diode, so that the characteristic of some wire product can not effectively be tested.
Utility model content
For above-mentioned defect and the problem of prior art, the utility model object is to provide the more general precision wire measurement mechanism of a kind of measure the item, solves the not high problem of wire rod measuring instrument versatility on market.
In order to achieve the above object, the utility model is realized by the following technical solutions:
A kind of precision wire measurement mechanism, by bus driver, bus interface, FPGA, IO plate interface, level translator, comparer, amplifier, TD input circuit, relay module, signal source commutation circuit, measurement module, constant current source module, constant pressure source module, AC signal source module composition, described FPGA, comparer, amplifier, TD input circuit connects successively, described FPGA, bus driver, IO plate interface connects successively, described FPGA is connected with bus interface, described constant current source module, constant pressure source module, AC signal source module is all connected with FPGA, described constant current source module, constant pressure source module, AC signal source module is all connected with signal source commutation circuit, described relay module, measurement module is all connected with signal handover source circuit with level translator, described relay module is connected with measurement module, described level translator, relay module, measurement module is all connected with FPGA.
Further technical scheme, described relay module is by input and output commutation circuit, sampling resistor, relay, relay drives and two differential amplifier circuit compositions, described input and output commutation circuit, sampling resistor connects from different differential amplifier circuits respectively, described input and output commutation circuit is connected with sampling resistor, described sampling resistor is connected with relay, described relay drives and is connected with relay, described input and output commutation circuit is connected with signal source commutation circuit, described relay drives with FPGA and is connected, relay module is connected with measurement module by two differential amplifier circuits.
Further technical scheme, described measurement module is by DAC part, accurate amplifier part, RMS-DC converter part, impedance transformation part, ADC part and signal switching part one, signal switching part two forms, described signal switching part one, accurate amplifier part is all connected with DAC part, described RMS-DC converter part, signal switching part two is all connected with accurate amplifier part, described impedance transformation part, RMS-DC converter part is all connected with signal switching part two, described impedance transformation part is connected with ADC part, described signal switching part one, signal switching part two is all connected with signal source commutation circuit, described DAC part, ADC part is all connected with FPGA, described signal switching part one is connected with two differential amplifier circuits in relay module respectively.
The utility model is by the signal switching circuit in measurement module and the input and output commutation circuit in relay module, realize input and the output of arbitrary port, reach pressure drop and the electric current that can measure between arbitrary port, can realize simultaneously shortly open circuit, the measurement of conduction impedance, resistance, electric capacity, diode, some survey, ACR, electric capacity polarity etc.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only an embodiment of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is structural representation of the present utility model.
Wherein: 1, level translator, 2, constant current source module, 3, amplifier, 4, TD input circuit, 5, constant pressure source module, 6, comparer, 7, AC signal source module, 8, bus interface, 9, FPGA, 10, IO plate interface, 11, bus driver, 12, signal source commutation circuit, 13, measurement module, 14, relay module, 15, DAC part, 16, accurate amplifier part, 17, signal switching part, 18, impedance transformation part, 19, RMS-DC converter part, 20, ADC part, 21, input and output commutation circuit, 22, sampling resistor, 23, relay, 24, relay drives, 25, differential amplifier circuit.
Embodiment
Below in conjunction with accompanying drawing of the present utility model, the technical solution of the utility model is clearly and completely described, obviously, described embodiment is only embodiment of the utility model, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Shown in Fig. 1, a kind of precision wire measurement mechanism provided by the utility model, by bus driver, bus interface, FPGA, IO plate interface, level translator, comparer, amplifier, TD input circuit, relay module, signal source commutation circuit, measurement module, constant current source module, constant pressure source module, AC signal source module composition, described FPGA, comparer, amplifier, TD input circuit connects successively, described FPGA, bus driver, IO plate interface connects successively, described FPGA is connected with bus interface, described constant current source module, constant pressure source module, AC signal source module is all connected with FPGA, described constant current source module, constant pressure source module, AC signal source module is all connected with signal source commutation circuit, described relay module, measurement module is all connected with signal source commutation circuit with level translator, described relay module is connected with measurement module, described level translator, relay module, measurement module is all connected with FPGA.
Relay module is driven by input and output commutation circuit, sampling resistor, relay, relay and two differential amplifier circuits form, described input and output commutation circuit, sampling resistor connect from different differential amplifier circuits respectively, described input and output commutation circuit is connected with sampling resistor, described sampling resistor is connected with relay, and described relay drives and is connected with relay.Relay module is connected with signal source commutation circuit by its input and output commutation circuit, and its relay drives and is connected with FPGA, and two differential amplifier circuit is all connected with measurement module.
Measurement module is by DAC part, accurate amplifier part, RMS-DC converter part, impedance transformation part, ADC part and two s' signal switching part forms, signal switching part one, accurate amplifier part is all connected with DAC part, RMS-DC converter part, signal switching part two is all connected with accurate amplifier part, impedance transformation part, RMS-DC converter part is all connected with signal switching part two, impedance transformation part is connected with ADC part, signal switching part one, signal switching part two is all connected with signal source commutation circuit, DAC part, ADC part is all connected with FPGA, signal switching part one is connected with two differential amplifier circuits in relay module respectively.
Functions of the present utility model is as follows:
The effect of bus driver provides driving power;
Bus interface is used for connecting peripherals;
FPGA controls other parts, and processes measurement result;
IO plate interface is for receiving and extraneous exchange message;
Level translator, for the conversion of level, makes different level have comparability;
TD input circuit is selected the signal of input;
Comparer is for the result of standard of comparison thing and measured object;
Amplifier is for measurement by magnification signal;
The changeable different signal of signal source commutation circuit source;
Constant current source module produces constant electric current;
Constant pressure source module produces constant power supply;
AC signal source mould produces AC signal;
Relay module is loaded into signal source at the two ends of determinand, and input measurement consequential signal is to measurement module;
Measurement module is the readable signal of FPGA the results conversion of measuring.
Principle of work of the present utility model is as follows:
The measuring principle of wire rod short interruption is: signal source commutation circuit switches to constant pressure source module and produces constant voltage, be connected to ground through sampling resistor again by line resistance, in the time that sampling resistor is a certain fixed value, upper terminal voltage (voltage of the nearly signal source) size of sampling resistor can be inversely proportional to line resistance, and this voltage is by the negative terminal mouth of input comparator after amplifying.If when line resistance is smaller, the dividing potential drop of sampling resistor can be larger, and comparer is output as low level so, if when wire rod short interruption, line resistance is infinitely great, and sampling resistor is almost 0 so, comparer output high level.
The measuring method of wire rod short interruption is as follows: suppose that measured object has n port, is connected test port one by one with precision wire measurement mechanism.By certain IO mouth (A01) output constant voltage signal of output distributor circuit control of IO plate, then use TD selector switch, select wherein 8 tunnels of IO mouth to return, after 5 times of amplifications, be sent to the negative input end of comparer, the positive input terminal reception FPGA of comparer measures the voltage on A01 road by DAC.If A01 has and connects and wire resistance when smaller with B01, according to electric resistance partial pressure, when the voltage after amplifier amplifies is greater than positive terminal voltage, the output of comparer will be overturn, CPU, by reading the comparator results register in FPGA, just can judge connection.
The measurement of wire rod resistance, measuring principle is: signal source commutation circuit switches to constant current source module and produces steady current, constant current signal is connected to ground to process measuring resistance again through measured object.Respectively draw differential signal from two ends and the standard resistor at two terminals of measured object, according to the Ohm law of series connection, can calculate the resistance sizes of measured object.
The method of testing of wire rod resistance is as follows: signal source commutation circuit switches to constant current source module and produces steady current, input and output commutation circuit is switched to IO plate, and the output distributor circuit of IO plate is inputted distributor circuit by SMA and got back to input and output commutation circuit of the present utility model.The output distributor circuit of IO plate connects measured object simultaneously, input distributor circuit, RFA input distributor circuit by SRA respectively again and be connected to output input-switching circuit of the present utility model, RFA input distributor circuit is connected to ground after being connected with measuring resistance after by output input-switching circuit.Measuring resistance, according to the size of measured resistance, is selected 10 Europe, 100 Europe, 1K Europe, 10K Europe, 30K Europe.Pressure drop between measured object two ends is the differential signal of MS and SR, by the pressure drop between calculating port and the pressure drop (difference of RFR and RFG) of measuring resistance, just can calculate resistance.
Resistance conducting, diode polarity measurement, diode electrically parameter measurement, ACR measure, principle and the measuring method of capacitance measurement are basic identical, and similar with resistance, those skilled in the art can derive and draw, are not repeated here.
Measuring principle test philosophy and resistance that wire rod point is surveyed are similar, are not repeated here.Method of testing is also similar with method for testing resistance, has only increased and has a little surveyed pen.Input and output commutation circuit is surveyed pen with point and is connected, and simultaneously IO plate is surveyed pen with point and is connected, is connected respectively formation measuring circuit by a survey, IO plate with measured object.The connected mode of other SMA input distributor circuits, SRA input distributor circuit, RFA input distributor circuit and measuring resistance etc. is consistent with resistance measurement method.In the time surveying pen measured object is carried out surveying, can carry out conducting, resistance, electric capacity, the measurement of diode ACR etc. simultaneously.
The above; it is only embodiment of the present utility model; but protection domain of the present utility model is not limited to this; any be familiar with those skilled in the art the utility model disclose technical scope in; can expect easily changing or replacing, within all should being encompassed in protection domain of the present utility model.Therefore, protection domain of the present utility model should described be as the criterion with the protection domain of claim.
Claims (3)
1. a precision wire measurement mechanism, it is characterized in that: by bus driver, bus interface, FPGA, IO plate interface, level translator, comparer, amplifier, TD input circuit, relay module, signal source commutation circuit, measurement module, constant current source module, constant pressure source module, AC signal source module composition, described FPGA, comparer, amplifier, TD input circuit connects successively, described FPGA, bus driver, IO plate interface connects successively, described FPGA is connected with bus interface, described constant current source module, constant pressure source module, AC signal source module is all connected with FPGA, described constant current source module, constant pressure source module, AC signal source module is all connected with signal source commutation circuit, described relay module, measurement module is all connected with signal handover source circuit with level translator, described relay module is connected with measurement module, described level translator, relay module, measurement module is all connected with FPGA.
2. precision wire measurement mechanism according to claim 1, it is characterized in that: described relay module is by input and output commutation circuit, sampling resistor, relay, relay drives and two differential amplifier circuit compositions, described input and output commutation circuit, sampling resistor connects from different differential amplifier circuits respectively, described input and output commutation circuit is connected with sampling resistor, described sampling resistor is connected with relay, described relay drives and is connected with relay, described input and output commutation circuit is connected with signal source commutation circuit, described relay drives with FPGA and is connected, relay module is connected with measurement module by two differential amplifier circuits.
3. precision wire measurement mechanism according to claim 1 and 2, it is characterized in that: described measurement module is by DAC part, accurate amplifier part, RMS-DC converter part, impedance transformation part, ADC part and signal switching part one, signal switching part two forms, described signal switching part one, accurate amplifier part is all connected with DAC part, described RMS-DC converter part, signal switching part two is all connected with accurate amplifier part, described impedance transformation part, RMS-DC converter part is all connected with signal switching part two, described impedance transformation part is connected with ADC part, described signal switching part one, signal switching part two is all connected with signal source commutation circuit, described DAC part, ADC part is all connected with FPGA, described signal switching part one is connected with two differential amplifier circuits in relay module respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320848725.7U CN203643534U (en) | 2013-12-20 | 2013-12-20 | Precise wire measuring equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320848725.7U CN203643534U (en) | 2013-12-20 | 2013-12-20 | Precise wire measuring equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203643534U true CN203643534U (en) | 2014-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320848725.7U Expired - Fee Related CN203643534U (en) | 2013-12-20 | 2013-12-20 | Precise wire measuring equipment |
Country Status (1)
| Country | Link |
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| CN (1) | CN203643534U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152734A (en) * | 2018-03-20 | 2018-06-12 | 郑州市轨道交通有限公司运营分公司 | A kind of test system and test method for the maintenance of valve class |
-
2013
- 2013-12-20 CN CN201320848725.7U patent/CN203643534U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152734A (en) * | 2018-03-20 | 2018-06-12 | 郑州市轨道交通有限公司运营分公司 | A kind of test system and test method for the maintenance of valve class |
| CN108152734B (en) * | 2018-03-20 | 2024-02-20 | 郑州市轨道交通有限公司运营分公司 | Testing system and testing method for valve overhaul |
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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: 20140611 Termination date: 20151220 |
|
| EXPY | Termination of patent right or utility model |