CN106443161A - Power measuring apparatus and method supporting hot swap of power probe - Google Patents
Power measuring apparatus and method supporting hot swap of power probe Download PDFInfo
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- CN106443161A CN106443161A CN201610717020.XA CN201610717020A CN106443161A CN 106443161 A CN106443161 A CN 106443161A CN 201610717020 A CN201610717020 A CN 201610717020A CN 106443161 A CN106443161 A CN 106443161A
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- probe
- power
- temperature
- voltage
- fpga
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/133—Arrangements for measuring electric power or power factor by using digital technique
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/14—Compensating for temperature change
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Tests Of Electronic Circuits (AREA)
Abstract
The invention provides a power measuring apparatus and method supporting hot swap of a power probe. The power measuring apparatus supporting hot swap of a power probe includes a power probe, a power meter host and a cable, wherein the power probe includes a detection head and a detection plate; a thermistor is arranged at a diode in the detection head to detect the operating temperature; a temperature bias unit is arranged in the detection plate to perform voltage dividing on temperature voltage signals output from the thermistor, and then the temperature voltage signals enter the power meter host through the cable; and after the temperature voltage signals enter the power meter host through the cable, one channel of the temperature voltage signals enter an FPGA through an ADC sampling unit for temperature compensation, and the other channel of the temperature voltage signals enter into a voltage comparison unit. The power measuring apparatus and method supporting hot swap of a power probe can be compatible with the original power probe and multi-core cables so that the hardware circuit of the power meter host is changed slightly and the hot swap function can effectively reduce the time for exchanging the probe; and the testing efficiency is improved.
Description
Technical field
The present invention relates to technical field of measurement and test, more particularly to a kind of power-measuring device for supporting power probe hot plug,
Further relate to a kind of power measurement method for supporting power probe hot plug.
Background technology
At present, the measurement to microwave and millimeter wave signal power, adopts energy meter main frame+multicore cable+power probe mostly
Form.Energy meter main frame can be equipped with multiple probes, the power bracket of different probe measurements, frequency range difference.In testing
It is frequently necessary to change power probe according to the change of measured signal, general way is to close energy meter main frame, changes probe, so
After open energy meter main frame.But energy meter host switch machine needs considerable time, Winxp and above system are especially installed
The peak power analyser switching on and shutting down of system and system self-testing time are up to a few minutes.
At present, existing energy meter does not support warm connection function.After heat inserts power probe, energy meter main frame can not recognize spy
Head, still needing to could identification probe after main frame is restarted.Further, since probe size and power consumption limit, it is impossible to increase additional circuit,
Universal cordage is also used for, without superfluous signal line, detection of popping one's head in.
Content of the invention
For solving above-mentioned deficiency of the prior art, the present invention proposes a kind of power measurement for supporting power probe hot plug
Device and method.
The technical scheme is that and be achieved in that：
A kind of power-measuring device for supporting power probe hot plug, including：Power probe, energy meter main frame and cable,
Power probe includes demodulator probe and detection plate, arranges critesistor in demodulator probe at diode to detect operating temperature, detection plate
Middle setting temperature offset unit carries out voltage division processing to the temperature voltage signal that critesistor is exported, through cable ingoing power meter master
Machine；
After temperature voltage signal ingoing power meter main frame, a road through ADC sampling unit enter FPGA be used for temperature-compensating, one
Road enters voltage comparison unit；
Voltage comparison unit includes amplifier and voltage comparator, and temperature voltage signal is input to amplifier negative input end,
The negative input end of amplifier is also by resistance eutral grounding；When insertion probe, amplifier output voltage is temperature electricity 3V, after amplification
Pressure signal enters the negative input end of voltage comparator, and compared with the reference voltage of its positive input terminal, its positive input terminal is with reference to electricity
Press as 2V, voltage comparator output low logic level is simultaneously sent to FPGA；When probe is pulled up, temperature voltage signal is 0, amplifier
Negative input end passes through resistance eutral grounding, remains as 0V after amplified device, exports high logic level and be sent to after voltage comparator
FPGA；
FPGA is connected with industrial computer module, and industrial computer module connection ports are configured to interrupt mode, and industrial computer module passes through
Interrupt mode receives the logic level of FPGA output, judges whether probe connects；When insertion probe, FPGA exports logic level
By high step-down, interrupt handling routine judges it is insertion probe, and industrial computer module reads probe data, including verification data, probe
Model, probe version number, and probe data is sent to upper level applications refreshing screen display, in screen display probe type
Number, and in measurement thread, accurate waveform is shown with reference to measured signal according to probe data；When probe connection is disconnected, FPGA is defeated
Go out logic level to be uprised by low, interrupt handling routine judges to extract probe, and industrial computer module nullifies probe data, and refreshes screen
Show, no longer show probe model and measured signal waveform.
Alternatively, the temperature voltage signal carries out linear amplification by amplifier, by adjusting amplifier positive input terminal
Between input resistance and positive input terminal and outfan, bridging resistance arranges the amplification of amplifier.
The invention allows for a kind of power measurement method for supporting power probe hot plug, including power probe, power
Meter main frame and cable, power probe includes demodulator probe and detection plate, arranges critesistor in demodulator probe at diode to detect work
Make temperature, temperature offset unit is arranged in detection plate carries out voltage division processing to the temperature voltage signal that critesistor is exported, through electricity
Cable ingoing power meter main frame, after temperature voltage signal ingoing power meter main frame, a road enters FPGA through ADC sampling unit is used for temperature
Degree compensation, a road enters voltage comparison unit；
Voltage comparison unit includes amplifier and voltage comparator, and temperature voltage signal is input to amplifier negative input end,
The negative input end of amplifier is also by resistance eutral grounding；When insertion probe, amplifier output voltage is temperature electricity 3V, after amplification
Pressure signal enters the negative input end of voltage comparator, and compared with the reference voltage of its positive input terminal, its positive input terminal is with reference to electricity
Press as 2V, voltage comparator output low logic level is simultaneously sent to FPGA；When probe is pulled up, temperature voltage signal is 0, amplifier
Negative input end passes through resistance eutral grounding, remains as 0V after amplified device, exports high logic level and be sent to after voltage comparator
FPGA；
FPGA is connected with industrial computer module, and industrial computer module connection ports are configured to interrupt mode, and industrial computer module passes through
Interrupt mode receives the logic level of FPGA output, judges whether probe connects；When insertion probe, FPGA exports logic level
By high step-down, interrupt handling routine judges it is insertion probe, and industrial computer module reads probe data, including verification data, pops one's head in
Model, version number of popping one's head in, and probe data is sent to upper level applications refreshing screen display, in screen display probe type
Number, and in measurement thread, accurate waveform is shown with reference to measured signal according to probe data；When probe connection is disconnected, FPGA is defeated
Go out logic level to be uprised by low, interrupt handling routine judges to extract probe, and industrial computer module nullifies probe data, and refreshes screen
Show, no longer show probe model and measured signal waveform.
Alternatively, the temperature voltage signal carries out linear amplification by amplifier, by adjusting amplifier positive input terminal
Between input resistance and positive input terminal and outfan, bridging resistance arranges the amplification of amplifier.
The invention has the beneficial effects as follows：
(1) compatible original power probe and multicore cable, energy meter host hardware circuit is changed little；
(2), the time required to warm connection function is effectively reduced replacing probe, testing efficiency is improved.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for technology description is had to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of theory diagram of the power-measuring device for supporting power probe hot plug of the present invention；
Fig. 2 is the probe hot plug process chart of the present invention；
Fig. 3 is the circuit diagram of the voltage comparison unit of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
At present, existing energy meter does not support warm connection function.The purpose of the present invention is that in power-measuring device, power is visited
Head and multicore cable do not do and change, and only increase partial circuit in energy meter main frame, by reading probe temperature voltage, judge power
Whether probe connects, so as to realize power probe hot plug.
With reference to Figure of description, the power-measuring device of the present invention is described in detail.
As shown in figure 1, the power-measuring device of the present invention includes：Power probe 1, energy meter main frame 2 and cable 5.
Power probe 1 includes demodulator probe 3 and detection plate 4.In order to realize the temperature to diode detection characteristic in demodulator probe 3
Compensation, arranges critesistor 6 near diode to detect its operating temperature, meanwhile, in detection plate 4, temperature offset unit 7 is set,
The temperature voltage exported by critesistor 6 carries out voltage division processing.3 output temperature voltage of demodulator probe is to detection plate 4, inclined through excess temperature
Put after unit 7 through 5 ingoing power meter main frame 2 of cable.Temperature voltage is entered through amplifying conditioning unit 8 in energy meter main frame 2
ADC sampling unit 9 carries out analog digital conversion, and digital temperature voltage enters late-class circuit is used for temperature compensation algorithm.
Restriction due to power probe volume and power consumption, it is impossible to increase the detection signal for hot plug, while in cable
Also no superfluous signal line is transmitted in portion, therefore temperature voltage is multiplexed, temperature voltage during by detecting plug probe
Change identification probe.As shown in figure 1, after temperature voltage ingoing power meter main frame 2, a road enters ADC sampling unit 9 is used for temperature
Backoff algorithm, a road enters voltage comparison unit 10.When probe disconnects, 2 input temp voltage of energy meter main frame is 0V, amplified
3.3V is exported after conditioning unit 8 and voltage comparison unit 10, and FPGA unit 11 is detected as logic high；During probe connection, demodulator probe 3
6 output temperature voltage of middle critesistor through temperature offset unit 7 and amplifies output high level, warp after conditioning unit 8 is nursed one's health
0V is exported after voltage comparison unit 10, and FPGA unit 11 is detected as logic low, and the logic level is connected with industrial computer module 12, work
12 connectivity port of control machine module is configured to interrupt mode, and industrial computer module 12 receives the logic level by interrupt mode, judges
Whether probe connects.
As shown in Fig. 2 when hot plug is popped one's head in, FPGA unit 11 exports logic level and changes, industrial computer module 12
Interrupt handling routine in access arrangement driving, judges it is that insertion is popped one's head in or extracts probe in interrupt handling routine.When slotting
When entering to pop one's head in, FPGA unit 11 exports logic level by high step-down, and interrupt handling routine judges it is insertion probe, industrial computer module
12 read probe data, including verification data, model of popping one's head in, and the information such as probe version number, and probe data is sent to upper strata
Application program refreshes screen display, in screen display probe model, and combines tested letter according to probe data in measurement thread
Number show accurate waveform；When probe connection is disconnected, FPGA unit 11 exports logic level and is uprised by low, and interrupt handling routine is sentenced
Break and probe is extracted, industrial computer module 12 nullifies probe data, and refreshes screen display, no longer show probe model and measured signal
Waveform.
Because by reading existing temperature voltage in probe 1, energy meter main frame 2 judges whether probe connects, it is right to be therefore not required to
Probe and cable are changed or are upgraded, compatible all probes.Energy meter main frame 2 need not change complete machine structure, it is only necessary to increase electricity
Pressure comparing unit 10 can achieve warm connection function.
As shown in figure 3,1 output temperature voltage signal SENSOR_TEMP of power probe is to amplifier N1 negative input end, amplify
The negative input end of device N1 is grounded also by resistance R26.Temperature voltage signal SENSOR_TEMP is linearly put by amplifier N1
Greatly, amplifier N1 is set by adjusting bridging resistance between amplifier N1 positive input terminal input resistance and positive input terminal and outfan
Amplification.When insertion probe, amplifier N1 output voltage is that temperature voltage signal 3V, after amplification enters voltage ratio relatively
The negative input end of device N2, compared with the reference voltage of its positive input terminal, its positive input terminal reference voltage is 2V, voltage comparator
N2 output low logic level is simultaneously sent to FPGA, for hot plug of popping one's head in.When probe is pulled up, temperature voltage signal SENSOR_
TEMP is grounded by resistance R26 for 0, amplifier N1 negative input end, remains as 0V after amplified device N1, defeated after voltage comparator
Go out high logic level and be sent to FPGA.
It is an advantage of the invention that compatible original power probe and multicore cable, energy meter host hardware circuit change little,
The time required to warm connection function is effectively reduced replacing probe, testing efficiency is improved.
Presently preferred embodiments of the present invention is the foregoing is only, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement that is made etc., should be included within the scope of the present invention.
Claims (4)
1. a kind of power-measuring device for supporting power probe hot plug, including：Power probe, energy meter main frame and cable, work(
Rate probe includes demodulator probe and detection plate, arranges critesistor in demodulator probe at diode to detect operating temperature, in detection plate
Arranging temperature offset unit carries out voltage division processing to the temperature voltage signal that critesistor is exported, through cable ingoing power meter master
Machine, it is characterised in that
After temperature voltage signal ingoing power meter main frame, a road enters FPGA through ADC sampling unit is used for temperature-compensating, and a road is entered
Enter voltage comparison unit；
Voltage comparison unit includes amplifier and voltage comparator, and temperature voltage signal is input to amplifier negative input end, amplifies
The negative input end of device is also by resistance eutral grounding；When insertion probe, amplifier output voltage is temperature voltage letter 3V, after amplification
Number enter voltage comparator negative input end, compared with the reference voltage of its positive input terminal, its positive input terminal reference voltage is
2V, voltage comparator output low logic level is simultaneously sent to FPGA；When probe is pulled up, temperature voltage signal is that 0, amplifier is born defeated
Entering end by resistance eutral grounding, after amplified device, 0V is remained as, high logic level is exported after voltage comparator and is sent to FPGA；
FPGA is connected with industrial computer module, and industrial computer module connection ports are configured to interrupt mode, and industrial computer module is by interrupting
Mode receives the logic level of FPGA output, judges whether probe connects；When insertion probe, FPGA output logic level is by height
Step-down, interrupt handling routine judge be insertion probe, industrial computer module read probe data, including verification data, probe model,
Probe version number, and probe data is sent to upper level applications refreshing screen display, in screen display probe model, and
In measurement thread, accurate waveform is shown with reference to measured signal according to probe data；When probe connection is disconnected, FPGA exports logic
Level is uprised by low, and interrupt handling routine judges to extract probe, and industrial computer module nullifies probe data, and refreshes screen display,
No longer show probe model and measured signal waveform.
2. a kind of power-measuring device for supporting power probe hot plug as claimed in claim 1, it is characterised in that the temperature
Degree voltage signal carries out linear amplification by amplifier, by adjust amplifier positive input terminal input resistance and positive input terminal with defeated
Go out between end and bridge the amplification that resistance arranges amplifier.
3. a kind of power measurement method for supporting power probe hot plug, it is characterised in that including power probe, energy meter main frame
And cable, power probe includes demodulator probe and detection plate, arranges critesistor in demodulator probe at diode to detect operating temperature,
Arranging temperature offset unit in detection plate carries out voltage division processing to the temperature voltage signal that critesistor is exported, and enters work(through cable
Rate meter main frame, after temperature voltage signal ingoing power meter main frame, a road enters FPGA through ADC sampling unit is used for temperature-compensating,
One tunnel enters voltage comparison unit；
Voltage comparison unit includes amplifier and voltage comparator, and temperature voltage signal is input to amplifier negative input end, amplifies
The negative input end of device is also by resistance eutral grounding；When insertion probe, amplifier output voltage is temperature voltage letter 3V, after amplification
Number enter voltage comparator negative input end, compared with the reference voltage of its positive input terminal, its positive input terminal reference voltage is
2V, voltage comparator output low logic level is simultaneously sent to FPGA；When probe is pulled up, temperature voltage signal is that 0, amplifier is born defeated
Entering end by resistance eutral grounding, after amplified device, 0V is remained as, high logic level is exported after voltage comparator and is sent to FPGA；
FPGA is connected with industrial computer module, and industrial computer module connection ports are configured to interrupt mode, and industrial computer module is by interrupting
Mode receives the logic level of FPGA output, judges whether probe connects；When insertion probe, FPGA output logic level is by height
Step-down, interrupt handling routine judges it is insertion probe, and industrial computer module reads probe data, including verification data, model of popping one's head in,
Probe version number, and probe data is sent to upper level applications refreshing screen display, in screen display probe model, and
In measurement thread, accurate waveform is shown with reference to measured signal according to probe data；When probe connection is disconnected, FPGA exports logic
Level is uprised by low, and interrupt handling routine judges to extract probe, and industrial computer module nullifies probe data, and refreshes screen display,
No longer show probe model and measured signal waveform.
4. a kind of power measurement method for supporting power probe hot plug as claimed in claim 3, it is characterised in that the temperature
Degree voltage signal carries out linear amplification by amplifier, by adjust amplifier positive input terminal input resistance and positive input terminal with defeated
Go out between end and bridge the amplification that resistance arranges amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610717020.XA CN106443161B (en) | 2016-08-18 | 2016-08-18 | A kind of power-measuring device that supporting power probe hot plug and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610717020.XA CN106443161B (en) | 2016-08-18 | 2016-08-18 | A kind of power-measuring device that supporting power probe hot plug and method |
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| Publication Number | Publication Date |
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| CN106443161A true CN106443161A (en) | 2017-02-22 |
| CN106443161B CN106443161B (en) | 2019-01-18 |
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| CN201610717020.XA Active CN106443161B (en) | 2016-08-18 | 2016-08-18 | A kind of power-measuring device that supporting power probe hot plug and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110967555A (en) * | 2019-11-26 | 2020-04-07 | 中电科仪器仪表有限公司 | Method for improving trigger precision of peak power measurement |
| CN112684234A (en) * | 2021-03-19 | 2021-04-20 | 深圳市鼎阳科技股份有限公司 | Probe identification method of oscilloscope and oscilloscope |
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| CN110967555A (en) * | 2019-11-26 | 2020-04-07 | 中电科仪器仪表有限公司 | Method for improving trigger precision of peak power measurement |
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| CN112684234B (en) * | 2021-03-19 | 2021-06-22 | 深圳市鼎阳科技股份有限公司 | Probe identification method of oscilloscope and oscilloscope |
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| Publication number | Publication date |
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| CN106443161B (en) | 2019-01-18 |
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