CN106950524B - Calibration method, device and calibration system for voltage measuring apparatus - Google Patents
Calibration method, device and calibration system for voltage measuring apparatus Download PDFInfo
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- CN106950524B CN106950524B CN201710096730.XA CN201710096730A CN106950524B CN 106950524 B CN106950524 B CN 106950524B CN 201710096730 A CN201710096730 A CN 201710096730A CN 106950524 B CN106950524 B CN 106950524B
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
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Abstract
The invention discloses a kind of calibration methods, device and calibration system for voltage measuring apparatus, the voltage measuring apparatus includes voltage sampling circuit and processor, voltage sampling circuit is used to carry out voltage sample to the power supply of input, the sampled output of voltage sampling circuit and the analog-to-digital conversion port of processor connect, the sample voltage value of corresponding power is calculated according to the digital quantity that analog-to-digital conversion port provides for processor, which includes: to input the first reference power source to voltage sampling circuit；The sample voltage value of corresponding first reference power source is calculated as the first sample voltage value in control processor；The second reference power source is inputted to voltage sampling circuit；The sample voltage value of corresponding second reference power source is calculated as the second sample voltage value in control processor；The downsampling factor that any sample voltage value is converted to the measurement voltage value of corresponding power is calculated according to the actual voltage value of the first and second sample voltage values and the first and second reference power sources.
Description
Technical field
The present invention relates to voltage measurement technologies field, more particularly it relates to a kind of for voltage measuring apparatus
Calibration method, a kind of calibrating installation for voltage measuring apparatus and a kind of calibration system.
Background technique
As shown in Figure 1, voltage measuring apparatus includes voltage sampling circuit and processor U1, which includes point
Piezoresistance R1 and divider resistance R2, and divider resistance R1 and divider resistance R2 are connected in series in the power input of voltage sampling circuit
It holds between J0 and ground terminal, the potential point between divider resistance R1 and divider resistance R2 is exported as the sampling of voltage sampling circuit
End is connect with analog-to-digital conversion (referred to as ADC) port P1 of processor U1, i.e. processor U1 is integrated with analog-to-digital conversion module, this
The voltage V of sampled output can be calculated in sample, processor U1 according to the digital quantity that analog-to-digital conversion module providesADC, go forward side by side
And the measurement voltage V0 of the power supply via power input J0 input is calculated, in which:
V0=K × VADCFormula (2)；
R1 is the Theoretical Design resistance value of divider resistance R1, and R2 is the Theoretical Design resistance value of divider resistance R2, and K is voltage sample
The downsampling factor of circuit, DnVoltage V is converted for analog-to-digital conversion moduleADCObtained binary numeral, VrefFor analog-to-digital conversion module
Internal reference voltage.
According to formula (1) to formula (3) it is found that the resistance essence of the measurement accuracy of measurement voltage V0 and divider resistance R1, R2
It spends related to the sampling error of analog-to-digital conversion module.In general, the measurement error of voltage measuring apparatus is 20mV or so,
And the sampling error of analog-to-digital conversion module is usually less than 0.8mV, the measurement error of relative voltage measuring device can be ignored not
Meter, therefore, measurement accuracy will primarily depend upon the resistance precision of divider resistance R1, R2.
Currently, the precision of resistance is broadly divided into 5%, 1%, 0.5%, 0.1% several grades, and the resistance of different accuracy institute
Corresponding price can exponentially type increase, so guaranteeing the measurement accuracy of tension measuring circuit by improving resistance precision merely
Huge cost pressure can be faced for batch production.Therefore, it is highly desirable to provide one kind and can be improved tension measuring circuit
Measurement accuracy calibration program.
Summary of the invention
One purpose of the embodiment of the present invention is to provide a kind of new technical solution for calibration voltage measuring circuit.
According to the first aspect of the invention, a kind of calibration method for voltage measuring apparatus is provided, the voltage is surveyed
Amount device includes voltage sampling circuit and processor, and the voltage sampling circuit is used to carry out voltage sample to the power supply of input,
The sampled output of the voltage sampling circuit is connect with the analog-to-digital conversion port of the processor, and the processor is according to
The sample voltage value of the corresponding power supply is calculated in the digital quantity that analog-to-digital conversion port provides, and the calibration method includes sequentially
The following steps of execution:
The first reference power source is inputted to the voltage sampling circuit；
It controls the processor and the sample voltage value of corresponding first reference power source is calculated as the first sampling electricity
Pressure value；
The second reference power source is inputted to the voltage sampling circuit；
It controls the processor and the sample voltage value of corresponding second reference power source is calculated as the second sampling electricity
Pressure value；
According to first sample voltage value, second sample voltage value, first reference power source virtual voltage
The actual voltage value of value and second reference power source calculates the measurement voltage that any sample voltage value is converted to corresponding power
The downsampling factor of value.
According to the second aspect of the invention, a kind of calibrating installation for voltage measuring apparatus is provided, the voltage is surveyed
Amount device includes voltage sampling circuit and processor, and the voltage sampling circuit is used to carry out voltage sample to the power supply of input,
The sampled output of the voltage sampling circuit is connect with the analog-to-digital conversion port of the processor, and the processor is according to
The sample voltage value of the corresponding power supply is calculated in the digital quantity that analog-to-digital conversion port provides, and the calibrating installation includes:
Connector is calibrated, the calibration connector is arranged to be used for connecting the power input of the voltage sampling circuit
End；
First control switch；
First reference power source, first reference power source connect via first control switch and the calibration connector
It connects；
Second control switch；
Second reference power source, second reference power source connect via second control switch and the calibration connector
It connects；And
Controller, the controller be arranged to be used for controlling the processor timesharing complete first reference power source and
The voltage sample of second reference power source calculates, to pass through the reality of first reference power source and second reference power source
Voltage value and respectively correspond first reference power source and the sample voltage value of second reference power source is obtained any sampling
Voltage value is converted to the downsampling factor of the measurement voltage value of corresponding power.
Optionally, the control implement body is arranged to be used for:
According to the first feedback signal for being closed the first control switch and the second control switch of disconnection, Xiang Suoshu processor
Send the first calibration signal；
Receive adopting for correspondence first reference power source that the processor is calculated according to first calibration signal
Sample voltage value is as the first sample voltage value；
After receiving first sample voltage value, controlled according to being closed the second control switch and having disconnected first
Second feedback signal of switch, Xiang Suoshu processor send the second calibration signal；
Receive adopting for correspondence second reference power source that the processor is calculated according to second calibration signal
Sample voltage value is as the second sample voltage value；
According to first sample voltage value, second sample voltage value, first reference power source virtual voltage
The actual voltage value of value and second reference power source calculates the downsampling factor；
The downsampling factor is written in the processor in memory.
Optionally, the calibrating installation further includes the human-computer interaction device connecting with the controller.
Optionally, the controller is also configured to for automatically controlling first control switch and second control
Make the switch state of switch.
Optionally, first control switch be controlled by the controller one of analog switch chip switch it is logical
Road, second control switch are another switching channels of the analog switch chip.
Optionally, the control implement body is arranged to be used for:
Control the first control switch closure and control the second control switch disconnect, it is rear to the processor send first
Calibration signal, so that the sampling of corresponding first reference power source is calculated according to first calibration signal for the processor
Voltage value is as the first sample voltage value；
It receives the processor returns after first sample voltage value is calculated first and completes signal；
Signal control the second control switch closure is completed according to described first and control first control switch is disconnected
Open, it is rear to the processor send the second calibration signal so that the processor is calculated according to second calibration signal
To correspondence second reference power source sample voltage value as the second sample voltage value；
It receives the processor returns after second sample voltage value is calculated second and completes signal；And
Actual voltage value and institute of the signal to processor output with first reference power source are completed according to described second
The revise signal of the actual voltage value of the second reference power source is stated, so that the processor is after receiving the revise signal, root
According to first sample voltage value, second sample voltage value, the actual voltage value of first reference power source and described
The actual voltage value of two reference power sources calculates and stores the downsampling factor.
According to the third aspect of the invention we, a kind of calibration system is provided comprising voltage measuring apparatus and calibrating installation,
The voltage measuring apparatus includes voltage sampling circuit and processor, and the voltage sampling circuit is used to carry out the power supply of input
Voltage sample, the sampled output of the voltage sampling circuit are connect with the analog-to-digital conversion port of the processor, the processing
The sample voltage value of the corresponding power supply is calculated according to the digital quantity that the analog-to-digital conversion port provides for device；
The calibrating installation includes:
First control switch；
First reference power source, first reference power source is via first control switch and the voltage sampling circuit
Power input connection；
Second control switch；
Second reference power source, second reference power source is via second control switch and the voltage sampling circuit
Power input connection；And
Controller, the controller be arranged to be used for controlling the processor timesharing complete first reference power source and
The voltage sample of second reference power source calculates, to pass through the reality of first reference power source and second reference power source
Voltage value and respectively correspond first reference power source and the sample voltage value of second reference power source is obtained any sampling
Voltage value is converted to the downsampling factor of the measurement voltage value of corresponding power.
Optionally, the controller is anti-according to be closed the first control switch and the second control switch of disconnection first
Feedback signal, Xiang Suoshu processor send the first calibration signal；
The sampled voltage of corresponding first reference power source is calculated according to first calibration signal for the processor
Value is used as the first sample voltage value, and exports first sample voltage value to the controller；
The controller is after receiving first sample voltage value, according to being closed the second control switch and disconnected
The second feedback signal of the first control switch is opened, Xiang Suoshu processor sends the second calibration signal；
The sampled voltage of corresponding second reference power source is calculated according to second calibration signal for the processor
Value is used as the second sample voltage value, and exports second sample voltage value to the controller；
The controller is according to first sample voltage value, second sample voltage value, first reference power source
Actual voltage value and the actual voltage value of second reference power source calculate the downsampling factor；
The controller downsampling factor is written in the memory of the processor.
Optionally, the controller controls the first control switch closure and control second control switch is disconnected
Open, it is rear to the processor send the first calibration signal；
The sampled voltage of corresponding first reference power source is calculated according to first calibration signal for the processor
Value is used as the first sample voltage value, and returns to first to the controller and complete signal；
The controller completes signal according to described first and controls the second control switch closure and control described first
Control switch disconnect, it is rear to the processor send the second calibration signal；
The sampled voltage of corresponding second reference power source is calculated according to second calibration signal for the processor
Value is used as the second sample voltage value, and returns to second to the controller and complete signal；
The controller completes signal according to described second and exports revise signal to processor, and the revise signal includes institute
State the actual voltage value of the first reference power source and the actual voltage value of second reference power source；
The processor is adopted after receiving the revise signal according to first sample voltage value, described second
The actual voltage value of sample voltage value, the actual voltage value of first reference power source and second reference power source is calculated and is stored
The downsampling factor.
A beneficial effect of the invention is that calibration method, calibrating installation and calibration system of the present invention are surveyed by voltage
Amount device measurement obtains the sample voltage value of corresponding two reference power sources, and according to the sample voltage value of corresponding two reference power sources
The measurement voltage value that any sample voltage value is converted to corresponding power is calculated with the actual voltage value of two reference power sources
Downsampling factor, in this way, the sampling that be calculated according to the Theoretical Design value of divider resistance can be substituted using the downsampling factor
Coefficient, and then realize the calibration of downsampling factor, after calibration is complete, the sampling that processor can be obtained directly using calibration
Coefficient calculates the measurement voltage of tested power supply, realizes the purpose for improving the measurement accuracy of voltage measuring apparatus.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Detailed description of the invention
It is combined in the description and the attached drawing for constituting part of specification shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 is the electrical block diagram of voltage measuring apparatus；
Fig. 2 is the flow diagram according to a kind of embodiment of calibration method of the present invention；
Fig. 3 is the electrical block diagram according to calibrating installation of the present invention and a kind of embodiment of calibration system；
Fig. 4 is the flow diagram that step is executed according to a kind of controller of embodiment of calibration method of the present invention；
Fig. 5 is the flow diagram that step is executed according to the controller of another embodiment of calibration method of the present invention.
Specific embodiment
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should also be noted that unless in addition having
Body explanation, the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to the present invention
And its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
Fig. 2 is a kind of flow diagram of embodiment of calibration method according to the present invention.
According to Fig.2, calibration method of the invention may include steps of:
Step S210 inputs first to voltage sampling circuit by the power input J0 of the voltage sampling circuit in Fig. 1
Reference power source executes following steps S220 later.
First reference power source is the basicly stable power supply of actual voltage value, for example, the first reference power source is to stablize shape
Output ripple is less than the stabilized power supply of 1mV under state.
First reference power source can be the low pressure difference linear voltage regulator (low of the product itself where voltage measuring apparatus
Dropout regulator, referred to as LDO) output accurate power supply；The power supply of external device (ED) offer is provided.
Step S220, the sample voltage value of corresponding first reference power source is calculated as the in processor U1 in control figure 1
One sample voltage value executes following steps S230 later.
First sample voltage value is after inputting the first reference power source to voltage sampling circuit, to pass through voltage sampling circuit
Sampled output output voltage measured value.Specifically, processor U1 is calculated corresponding first according to above-mentioned formula (1)
The sample voltage value of reference power source.
Step S230 inputs second to voltage sampling circuit by the power input J0 of the voltage sampling circuit in Fig. 1
Reference power source executes following steps S240 later.
Second reference power source is similarly the basicly stable power supply of actual voltage value, for example, the second reference power source is steady
Determine the stabilized power supply that output ripple under state is less than 1mV.
The actual voltage value of second reference power source is different from the actual voltage value of the first reference power source, wherein " difference "
Meaning is that difference between the two enables the analog-to-digital conversion module of processor U1 to tell.
For example, the actual voltage value of the first reference power source be equal to Fig. 1 in voltage measuring apparatus voltage measurement range it is upper
Limit value, and the actual voltage value of the second reference power source is equal to the one third of the upper limit value.
Second reference power source equally can be the accurate electricity of the LDO output of the product itself where voltage measuring apparatus
Source；The power supply of external device (ED) offer is provided.
The sample voltage value conduct of corresponding second reference power source is calculated in step S240, the processor U1 in control figure 1
Second sample voltage value executes step S250 later.
Second sample voltage value is after inputting the second reference power source to voltage sampling circuit, to pass through voltage sampling circuit
Sampled output output voltage measured value.Specifically, processor U1 is calculated corresponding second according to above-mentioned formula (1)
The sample voltage value of reference power source.
Step S250, according to the first sample voltage value VADC1, the second sample voltage value VADC2, the first reference power source reality
The actual voltage value V2 of voltage value V1 and the second reference power source, which is calculated, is converted to corresponding power for any sample voltage value
Measure the downsampling factor K ' of voltage value.
Specifically,
Since downsampling factor K ' is calculated by reference to the actual voltage value and corresponding sample voltage value of power supply,
Moreover, identical error can also be removed using two reference power sources, therefore, using downsampling factor K ' multiplied by power supply to be measured
The measurement voltage value that sample voltage value obtains, the opposite downsampling factor K being calculated using formula (3) is multiplied by power supply to be measured
The measurement voltage value that sample voltage value obtains will be more nearly the actual voltage value of power supply to be measured, and then improve voltage measurement
The measurement accuracy of device.
Fig. 3 is a kind of electrical block diagram of embodiment of calibrating installation and calibration system according to the present invention.
According to Fig.3, calibration system of the invention includes voltage measuring apparatus and calibrating installation 100.
The voltage measuring apparatus includes voltage sampling circuit and processor U1, and voltage sampling circuit is used for the power supply to input
Carry out voltage sample, the analog-to-digital conversion port P1 connection of the sampled output and processor of the voltage sampling circuit, processor U1
According to the digital quantity that analog-to-digital conversion port provides, the sample voltage value of corresponding power is calculated by above-mentioned formula (1).
The calibrating installation 100 includes the first control switch S1, the first reference power source V1, the second control switch S2, the second ginseng
Examine power supply V2 and controller U2.
The first control switch S1 and the second control switch S2 can be hand control switch, be also possible to be controlled by control
The automatic control switch of device U2.
For automatic control switch, first control switch S1 can be the analog switch chip for being controlled by controller U2
One switching channels, second control switch S2 can be another switching channels of same analog switch chip.
The first reference power source V1 via the first control switch S1 and voltage sampling circuit power input J0 connection.
The second reference power source V2 is connected via the power input of the second control switch S2 and voltage sampling circuit.
Controller U2 is arranged to be used for control processor U1 timesharing and completes the first reference power source V1 and second with reference to electricity
The voltage sample of source V2 calculates, to pass through actual voltage value V1, V2 of the first reference power source V1 and the second reference power source V2 and divide
Not Dui Ying the first reference power source V1 and the second reference power source V2 sample voltage value VADC1、VADC2It obtains any sample voltage value
Be converted to the downsampling factor K ' of the measurement voltage value of corresponding power.
In one particular embodiment of the present invention, the interactive process between controller U2 and processor U1 may include as
Lower step:
Step S311, controller U2 according to be closed the first control switch S1 and disconnect the second control switch S2 first
Feedback signal sends the first calibration signal to processor U1.
In the embodiment that the first control switch S1 and the second control switch S2 is manual switch, which can
To be inputted by calibration personnel by human-computer interaction device, wherein the human-computer interaction device is connect with controller.
The first control switch S1 and the second control switch S2 be automatic switch embodiment in, first feedback signal by
The program unit of the switch state of the control switch S1 and S2 of controller U2 provides.In this embodiment, controller U2 is first controlled
First control switch S1 closure and the second control switch S2 of control are disconnected, then send the first calibration signal to processor U1.
The sampled voltage of corresponding first reference power source V1 is calculated according to the first calibration signal by step S321, processor U1
Value is used as the first sample voltage value VADC1, and export the first sample voltage value VADC1To controller U2.
Step S312, controller U2 are receiving the first sample voltage value VADC1Later, it opens according to being closed the second control
The second feedback signal for closing and disconnecting the first control switch sends the second calibration signal to processor U1.
In the embodiment that the first control switch S1 and the second control switch S2 is manual switch, which can
To be inputted by calibration personnel by human-computer interaction device, wherein the human-computer interaction device is connect with controller.
The first control switch S1 and the second control switch S2 be automatic switch embodiment in, second feedback signal by
The program unit of the switch state of the control switch S1 and S2 of controller U2 provides.In this embodiment, controller U2 is first controlled
First control switch S1 is disconnected and control the second control switch S2 closure, then sends the second calibration signal to processor U1.
The sampled voltage of corresponding second reference power source V2 is calculated according to the second calibration signal by step S322, processor U1
Value is used as the second sample voltage value VADC2, and export the second sample voltage value VADC2To controller U2.
Step S313, controller U2 are according to the first sample voltage value VADC1, the second sample voltage value VADC2, first with reference to electricity
The actual voltage value V2 of the actual voltage value V1 of source V1 and the second reference power source V2 calculate downsampling factor K '.
Step S314, controller U2 will be in the memories of downsampling factor K ' write-in processor U1.
In step S314, controller U2 can also be by the flat of the downsampling factor K ' of more than two identical voltage measuring apparatus
Mean value is written in the memory of processor U1.The embodiment is suitable for only selecting the partial circuit plate PCBA in a batch (should
Circuit board has voltage measuring apparatus) calculating of downsampling factor K ' is carried out, and calculate the sampling system for the partial circuit plate picked out
The average value of K ' is counted to correct the downsampling factor of the voltage measuring apparatus of all circuit boards of the batch.
In a further embodiment, the calculating of downsampling factor K ' can also be completed by processor U1 itself.The embodiment can
To include the following steps:
Step S411, controller U2 control the first control switch S1 closure and the second control switch S2 of control is disconnected, later
The first calibration signal is sent to processor U1.
The sampled voltage of corresponding first reference power source V1 is calculated according to the first calibration signal by step S421, processor U1
Value is used as the first sample voltage value VADC1, and return to first to controller U2 and complete signal.
Step S412, controller U2 complete signal according to first and control the second control switch S2 closure and the first control of control
Make switch S1 disconnect, it is rear to processor U1 transmission the second calibration signal.
The sampled voltage of corresponding second reference power source V2 is calculated according to the second calibration signal by step S422, processor U1
Value is used as the second sample voltage value VADC2, and return to second to controller U2 and complete signal.
Step S413, controller U2 complete signal according to second and export revise signal, the revise signal packet to processor U1
Include the actual voltage value V2 of the actual voltage value V1 and the second reference power source V2 of the first reference power source V1.
Step S423, processor U1 are after receiving revise signal, according to the first sample voltage value VADC1, second sampling
Voltage value VADC2, the first reference power source V1 the actual voltage value V2 of actual voltage value V1 and the second reference power source V2 calculate and deposit
Store up downsampling factor K '.
In order to reduce the correction cost of correction downsampling factor, dedicated means for correcting 100 can be separately provided, to pass through school
Equipment 100 corrects the voltage measuring apparatus on all circuit boards, without respective calibration cartridge is arranged on each circuit board
It sets.
In the embodiment that means for correcting 100 is separately provided, which may include calibration connector (in figure
Be not shown), the first control switch S1, the first reference power source V1, the second control switch S2, the second reference power source V2 and controller
U2。
The calibration connector is arranged to be used for the power input J0 of connection voltage sampling circuit.
The calibration connector can be connector, connection thimble etc. according to the form of circuit on board supply input terminal J0.
First reference power source V1 is connect via the first control switch S1 with calibration connector.
Second reference power source V2 is connect via the second control switch S2 with calibration connector.
Controller U2 is arranged to be used for control processor U1 timesharing and completes the first reference power source V1 and the second reference power source
The voltage sample of V2 calculates, to pass through actual voltage value V1, V2 and difference of the first reference power source V1 and the second reference power source V2
The sample voltage value V of corresponding first reference power source V1 and the second reference power source V2ADC1、VADC2It obtains turning any sample voltage value
It is changed to the downsampling factor K ' of the measurement voltage value of corresponding power.
In one particular embodiment of the present invention, according to Fig.4, controller U2 can specifically be arranged to be used for holding
Row following steps:
Step S511, according to the first feedback signal for being closed the first control switch and the second control switch of disconnection, to place
It manages device U1 and sends the first calibration signal.
Step S512 receives adopting for correspondence the first reference power source V1 that processor U1 is calculated according to the first calibration signal
Sample voltage value is as the first sample voltage value VADC1。
Step S513 is receiving the first sample voltage value VADC1Later, according to be closed the second control switch and disconnect
Second feedback signal of the first control switch sends the second calibration signal to processor U1.
Step S514 receives adopting for correspondence the second reference power source V2 that processor U1 is calculated according to the second calibration signal
Sample voltage value is as the second sample voltage value VADC2。
Step S515, according to the first sample voltage value VADC1, the second sample voltage value VADC2, the first reference power source V1 reality
The actual voltage value V2 of border voltage value V1 and the second reference power source V2, which are calculated, is converted to corresponding electricity for any sample voltage value
The downsampling factor K ' of the measurement voltage value in source.
The average value of downsampling factor K ' or the downsampling factor K ' of more than two voltage measuring apparatus are written step S516
In the processor in memory.
In another specific embodiment of the invention, according to Fig.5, controller U2 can also specifically be arranged to use
In execution following steps:
Step S611, the first control switch S1 of control closure and the second control switch S2 of control are disconnected, and execute step later
S612。
Step S612 sends the first calibration signal to processor U1, so that processor U1 is calculated according to the first calibration signal
The sample voltage value of corresponding first reference power source V1 is obtained as the first sample voltage value VADC1。
Step S613 receives processor U1 and the first sample voltage value V is being calculatedADC1First returned afterwards completes letter
Number.
Step S614 completes signal according to first and controls the second control switch S2 closure and the first control switch S1 of control
It disconnects, executes step S615 later.
Step S615 sends the second calibration signal to processor U1, so that processor U1 is calculated according to the second calibration signal
The sample voltage value of corresponding second reference power source V2 is obtained as the second sample voltage value VADC2。
Step S616 receives processor U1 and the second sample voltage value V is being calculatedADC2Second returned afterwards completes letter
Number.
Step S617 completes signal to actual voltage value of the processor U1 output with the first reference power source V1 according to second
The revise signal of the actual voltage value V2 of V1 and the second reference power source V2, so that processor is after receiving revise signal, according to
First sample voltage value VADC1, the second sample voltage value VADC2, the first reference power source V1 actual voltage value V1 and second ginseng
The actual voltage value V2 for examining power supply V2 is calculated and is stored downsampling factor K '.
The difference of the various embodiments described above primary focus description and other embodiments, but those skilled in the art should be clear
Chu, the various embodiments described above can according to need exclusive use or are combined with each other.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.The selection of term used herein, purport
In the principle, practical application or technological improvement to the technology in market for best explaining each embodiment, or lead this technology
Other those of ordinary skill in domain can understand each embodiment disclosed herein.The scope of the present invention is limited by appended claims
It is fixed.
Claims (9)
1. a kind of calibrating installation for voltage measuring apparatus, the voltage measuring apparatus include voltage sampling circuit and processing
Device, the voltage sampling circuit are used to carry out voltage sample, the sampled output of the voltage sampling circuit to the power supply of input
It is connect with the analog-to-digital conversion port of the processor, the processor is calculated according to the digital quantity that the analog-to-digital conversion port provides
Obtain corresponding to the sample voltage value of the power supply, which is characterized in that the calibrating installation includes:
Connector is calibrated, the calibration connector is arranged to be used for connecting the power input of the voltage sampling circuit；
First control switch；
First reference power source, first reference power source are connect via first control switch with the calibration connector；
Second control switch；
Second reference power source, second reference power source are connect via second control switch with the calibration connector；With
And
Controller, the controller are arranged to be used for controlling the processor timesharing and complete first reference power source and described
The voltage sample of second reference power source calculates, to pass through the virtual voltage of first reference power source and second reference power source
Value and respectively correspond first reference power source and the sample voltage value of second reference power source is obtained any sampled voltage
Value is converted to the downsampling factor of the measurement voltage value of corresponding power.
2. calibrating installation according to claim 1, which is characterized in that the control implement body is arranged to be used for:
According to the first feedback signal for being closed the first control switch and the second control switch of disconnection, Xiang Suoshu processor is sent
First calibration signal；
Receive the sampling electricity for correspondence first reference power source that the processor is calculated according to first calibration signal
Pressure value is as the first sample voltage value；
After receiving first sample voltage value, according to be closed the second control switch and disconnect the first control switch
The second feedback signal, Xiang Suoshu processor send the second calibration signal；
Receive the sampling electricity for correspondence second reference power source that the processor is calculated according to second calibration signal
Pressure value is as the second sample voltage value；
According to first sample voltage value, second sample voltage value, first reference power source actual voltage value and
The actual voltage value of second reference power source calculates the downsampling factor；
The downsampling factor is written in the memory of the processor.
3. calibrating installation according to claim 1 or 2, which is characterized in that the calibrating installation further includes and the control
The human-computer interaction device of device connection.
4. calibrating installation according to claim 1 or 2, which is characterized in that the controller is also configured to for automatic
Control the switch state of first control switch and second control switch.
5. calibrating installation according to claim 4, which is characterized in that first control switch is to be controlled by the control
One switching channels of the analog switch chip of device, second control switch are another switch of the analog switch chip
Channel.
6. calibrating installation according to claim 4, which is characterized in that the control implement body is arranged to be used for:
Control the first control switch closure and control the second control switch disconnect, it is rear to the processor send first calibration
Signal, so that the sampled voltage of corresponding first reference power source is calculated according to first calibration signal for the processor
Value is used as the first sample voltage value；
It receives the processor returns after first sample voltage value is calculated first and completes signal；
Signal, which is completed, according to described first controls the second control switch closure and control the first control switch disconnection,
It is rear send the second calibration signal to the processor so that the processor is calculated pair according to second calibration signal
Answer the sample voltage value of second reference power source as the second sample voltage value；
It receives the processor returns after second sample voltage value is calculated second and completes signal；And
The actual voltage value and described that signal has to processor output first reference power source is completed according to described second
The revise signal of the actual voltage value of two reference power sources, so that the processor is after receiving the revise signal, according to institute
State the first sample voltage value, second sample voltage value, the actual voltage value of first reference power source and second ginseng
The actual voltage value for examining power supply calculates and stores the downsampling factor.
7. a kind of calibration system, which is characterized in that including voltage measuring apparatus and calibrating installation, the voltage measuring apparatus includes
Voltage sampling circuit and processor, the voltage sampling circuit are used to carry out voltage sample to the power supply of input, and the voltage is adopted
The sampled output of sample circuit is connect with the analog-to-digital conversion port of the processor, and the processor is according to the analog-to-digital conversion end
The sample voltage value of the corresponding power supply is calculated in the digital quantity that mouth provides；
The calibrating installation includes:
First control switch；
First reference power source, first reference power source via first control switch and the voltage sampling circuit power supply
Input terminal connection；
Second control switch；
Second reference power source, second reference power source via second control switch and the voltage sampling circuit power supply
Input terminal connection；And
Controller, the controller are arranged to be used for controlling the processor timesharing and complete first reference power source and described
The voltage sample of second reference power source calculates, to pass through the virtual voltage of first reference power source and second reference power source
Value and respectively correspond first reference power source and the sample voltage value of second reference power source is obtained any sampled voltage
Value is converted to the downsampling factor of the measurement voltage value of corresponding power.
8. calibration system according to claim 7, which is characterized in that
The controller is according to the first feedback signal for being closed the first control switch and the second control switch of disconnection, Xiang Suoshu
Processor sends the first calibration signal；
The processor is made according to the sample voltage value that corresponding first reference power source is calculated in first calibration signal
For the first sample voltage value, and first sample voltage value is exported to the controller；
The controller is after receiving first sample voltage value, according to being closed the second control switch and disconnected the
Second feedback signal of one control switch, Xiang Suoshu processor send the second calibration signal；
The processor is made according to the sample voltage value that corresponding second reference power source is calculated in second calibration signal
For the second sample voltage value, and second sample voltage value is exported to the controller；
The controller is according to first sample voltage value, second sample voltage value, the reality of first reference power source
The actual voltage value of border voltage value and second reference power source calculates the downsampling factor；
The controller downsampling factor is written in the memory of the processor.
9. calibration system according to claim 7, which is characterized in that
The controller controls the first control switch closure and control second control switch disconnects, it is backward described in
Processor sends the first calibration signal；
The processor is made according to the sample voltage value that corresponding first reference power source is calculated in first calibration signal
For the first sample voltage value, and first is returned to the controller and completes signal；
The controller completes signal according to described first and controls the second control switch closure and control first control
Switch disconnect, it is rear to the processor send the second calibration signal；
The processor is made according to the sample voltage value that corresponding second reference power source is calculated in second calibration signal
For the second sample voltage value, and second is returned to the controller and completes signal；
The controller completes signal according to described second and exports revise signal to processor, and the revise signal includes described the
The actual voltage value of the actual voltage value of one reference power source and second reference power source；
The processor is after receiving the revise signal, according to first sample voltage value, the second sampling electricity
The actual voltage value of pressure value, the actual voltage value of first reference power source and second reference power source is calculated and is stored described
Downsampling factor.
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| CN108132452A (en) * | 2018-02-06 | 2018-06-08 | 苏州硬木智能科技有限公司 | It is a kind of for the detection calibration plate of signal acquiring board and its calibration and test method |
| CN110824222B (en) * | 2018-08-08 | 2023-04-11 | 比亚迪汽车工业有限公司 | Signal sampling method and system and vehicle |
| CN113341362B (en) * | 2021-08-05 | 2021-10-15 | 苏州浪潮智能科技有限公司 | Measurement correction method and device of sensor and server power supply |
| CN114675074B (en) * | 2022-04-13 | 2022-09-27 | 深圳市航顺芯片技术研发有限公司 | VDDA correction device and correction method of MCU |
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