CN207923152U - Signal sampling device and electrical equipment - Google Patents
Signal sampling device and electrical equipment Download PDFInfo
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- CN207923152U CN207923152U CN201721721847.4U CN201721721847U CN207923152U CN 207923152 U CN207923152 U CN 207923152U CN 201721721847 U CN201721721847 U CN 201721721847U CN 207923152 U CN207923152 U CN 207923152U
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Abstract
The utility model discloses a kind of signal sampling device and electrical equipments, wherein signal sampling device includes：Sensor unit, sensor unit include feeder ear, and sensor unit by detecting parameter to be measured to export detection signal in real time；AD conversion unit, AD conversion unit is connected with sensor unit, AD conversion unit includes reference voltage end, reference voltage end is connected after being connected with the feeder ear of sensor unit with preset reference power source, and AD conversion unit to detection signal by carrying out analog-to-digital conversion with output digit signals；Micro-control unit, micro-control unit are connected with AD conversion unit, and micro-control unit obtains the real signal value of parameter to be measured according to digital signal.The reference voltage and sensor unit of the AD conversion unit of the device are powered using common power supply, so as to so that measurement result is not influenced by reference power source, substantially increase measurement accuracy, and cost is relatively low.
Description
Technical field
The utility model is related to technical field of electric appliances, more particularly to a kind of signal sampling device, a kind of electrical equipment.
Background technology
In the related technology, signal sampling device generally uses structure as shown in Figure 1.ADC(Analog-to-Digital
Converte, analog-digital converter) acquire the detection signal (voltage signal or current signal) that sensor unit exports, MCU
The detection signal outputting measurement value that (Microcontroller Unit, micro-control unit) is exported according to ADC.
Wherein, as shown in Figure 1, the reference voltage and sensor unit of ADC have corresponding power supply (VCC1 respectively
And VCC2).The measurement result of ADC and precision, the stability of the power supply VCC1 of reference voltage have direct relation, sensing
The output result of device unit and precision, the stability of its power supply VCC2 have direct relation, therefore, the measured value of MCU outputs
Measurement accuracy influenced by the precision and stability of VCC1 and VCC2.
In order to improve measurement accuracy, although the power supply of higher precision and stability can be used, which is used
Measurement accuracy to be promoted be also limited, and cost of hardware design can be increased.
Utility model content
The utility model is made to the understanding of problems with and research based on inventor：
In the related technology, as shown in Figure 1, signal sampling device may include sensor unit, ADC and MCU, sensor list
Member acquires the power of parameter (pressure, temperature etc.) to be measured, and exports electric signal VO to ADC.ADC is according to electric signal VO with code
Form output digit signals OUTCOAD is to MCU, so that MCU obtains the real signal value Vm of parameter to be measured according to digital signal.
Under normal circumstances, the ratio of VO and VCC2 is multiplied by the real signal value Vm that range is parameter to be measured, i.e.,：
Vm=(VO/V2) * A (1)
Wherein, Vm is the real signal value (such as pressure value, temperature value) of parameter to be measured, and VO is the output of sensor unit
Electric signal, A be sensor unit Full-span output value, V2 be sensor unit power supply voltage value.
The electric signal VO general satisfactions following formula (2) of the output of sensor unit：
VO=(OUTCODE/ACODE) * V1 (2)
Wherein, VO is the electric signal of the output of sensor unit, and OUTCODE is digital signal, and ACODE is full scale number
Signal value output, V1 are the voltage value of the power supply of the reference voltage of ADC.It will be apparent that the reference voltage of ADC
The stability and precision of power supply VCC1 determines that MCU collects the stability and precision of digital signal OUTCODE.
Formula (2), which is substituted into formula (1), can obtain following formula (3)：
Wherein, Vm is the real signal value of parameter to be measured, and OUTCODE is digital signal, and ACODE is full scale digital signal
Output valve, V1 are the voltage value of the power supply of the reference voltage of ADC, and V2 is the voltage of the power supply of sensor unit
Value.
By formula (3) it is found that the measurement accuracy of the real signal value Vm of parameter to be measured by VCC1 and VCC2 precision with it is steady
Surely the influence spent.In practical application, ripple, temperature coefficient, null offset of VCC1 and VCC2 etc. can be to VCC1 and VCC2
Precision is constituted with stability to be influenced, to which measurement result can be caused inaccurate.
The utility model is intended to solve at least some of the technical problems in related technologies.For this purpose, this reality
It is to propose a kind of signal sampling device, the reference voltage of the AD conversion unit of the device with first novel purpose
It is powered using common power supply with sensor unit, so as to so that measurement result is not influenced by reference power source, significantly
Measurement accuracy is improved, and cost is relatively low.
Second purpose of the utility model is to propose a kind of electrical equipment.
In order to achieve the above objectives, the utility model first aspect proposes a kind of signal sampling device, including：Sensor list
Member, the sensor unit include feeder ear, and the sensor unit by detecting parameter to be measured to export detection signal in real time；
AD conversion unit, the AD conversion unit are connected with the sensor unit, and the AD conversion unit includes benchmark ginseng
Examine voltage end, the reference voltage end be connected with the feeder ear of the sensor unit after with preset reference power source phase
Even, the AD conversion unit to the detection signal by carrying out analog-to-digital conversion with output digit signals；Micro-control unit, institute
It states micro-control unit with the AD conversion unit to be connected, the micro-control unit obtains described to be measured according to the digital signal
The real signal value of parameter.
Signal sampling device according to the present utility model detects parameter to be measured by sensor unit to export detection in real time
Signal, the reference voltage end of AD conversion unit packet be connected with the feeder ear of sensor unit after with preset reference power source
It is connected, AD conversion unit carries out analog-to-digital conversion with output digit signals to detection signal, and micro-control unit is according to digital signal
Obtain the real signal value of parameter to be measured.The reference voltage and sensor unit of the AD conversion unit of the device as a result,
It is powered using common power supply, so as to so that measurement result is not influenced by reference power source, substantially increase measurement essence
Degree, and cost is relatively low.
In addition, can also have following additional technical feature according to the utility model signal sampling device set forth above：
Specifically, the sensor unit includes temperature sensor and/or pressure sensor.
Further, the parameter to be measured includes temperature and/or pressure.
Specifically, the detection signal is voltage signal or current signal.
Specifically, the real signal value of the parameter to be measured meets following formula：Vm=(OUTCODE/ACODE) * A,
In, Vm is the real signal value of the parameter to be measured, and OUTCODE is the digital signal, and ACODE is that full scale digital signal is defeated
Go out value, A is Full-span output value.
In order to achieve the above objectives, the utility model second aspect proposes a kind of electrical equipment comprising the utility model
Signal sampling device described in first aspect.
The electrical equipment of the utility model passes through above-mentioned signal sampling device, the reference electricity of AD conversion unit
Pressure and sensor unit are powered using common power supply, so as to so that measurement result is not influenced by power supply, greatly
Measurement accuracy is improved greatly, and cost is relatively low.
Description of the drawings
The utility model is above-mentioned and/or additional aspect and advantage from the following description of the accompanying drawings of embodiments will
Become apparent and be readily appreciated that, wherein
Fig. 1 is the block diagram of signal sampling device in the related technology；
Fig. 2 is the block diagram according to the signal sampling device of the utility model one embodiment；And
Fig. 3 is the flow chart according to the signal sampling method of the utility model one embodiment.
Specific implementation mode
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
Below with reference to the accompanying drawings the signal sampling device, electrical equipment and signal sampling side of the utility model embodiment are described
Method.
Fig. 2 is the block diagram according to the signal sampling device of the utility model one embodiment.As shown in Fig. 2, should
Device includes：Sensor unit 10, AD conversion unit 20 and micro-control unit 30.
Wherein, sensor unit 10 includes feeder ear U1, and sensor unit 10 by detecting parameter to be measured to export in real time
Detect signal VO.AD conversion unit 20 is connected with sensor unit 10, and AD conversion unit 20 includes reference voltage end
U2, reference voltage end U2 are connected after being connected with the feeder ear U1 of sensor unit with preset reference power source VCC, and modulus turns
Unit 20 is changed by carrying out analog-to-digital conversion to detection signal VO with output digit signals OUTCOAD.Micro-control unit 30 and modulus
Converting unit 20 is connected, and micro-control unit 30 obtains the real signal value Vm of parameter to be measured according to digital signal.
In the embodiments of the present invention, detection signal can be voltage signal or current signal.The reality of parameter to be measured
Border signal value Vm meets following formula (4)：
Vm=(OUTCODE/ACODE) * A (4)
Wherein, Vm is the real signal value of parameter to be measured, and OUTCODE is digital signal, and ACODE is full scale digital signal
Output valve, A are Full-span output value.
Specifically, the real signal value Vm general satisfactions following formula (1) of parameter to be measured：
Vm=(VO/V2) * A (1)
Wherein, Vm is the real signal value (such as pressure value, temperature value) of parameter to be measured, and VO is the output of sensor unit
Electric signal, A be sensor unit Full-span output value, V2 be sensor unit power supply voltage value.
The electric signal VO general satisfactions following formula (2) of the output of sensor unit：
VO=(OUTCODE/ACODE) * V1 (2)
Wherein, VO is the electric signal of the output of sensor unit, and OUTCODE is digital signal, and ACODE is full scale number
Signal value output, V1 are the voltage value of the power supply of the reference voltage of ADC (AD conversion unit 20).It will be apparent that ADC
The stability and precision of the power supply VCC1 of the reference voltage of (AD conversion unit 20) determines MCU (micro-control units
30) stability and precision of digital signal OUTCODE are collected.
Formula (2), which is substituted into formula (1), can obtain following formula (3)：
Wherein, Vm is the real signal value of parameter to be measured, and OUTCODE is digital signal, and ACODE is full scale digital signal
Output valve, V1 are the voltage value of the power supply of the reference voltage of AD conversion unit 20 (ADC), and V2 is sensor unit
The voltage value of 10 power supply.
And in the embodiments of the present invention, as shown in Fig. 2, sensor unit 10 and AD conversion unit 20 use altogether
Same reference power source VCC power supplies, i.e. V1=V2, therefore, the real signal value Vm of parameter to be measured meet following formula (4)：
Vm=(OUTCODE/ACODE) * A (4)
Wherein, Vm is the real signal value of parameter to be measured, and OUTCODE is digital signal, and ACODE is full scale digital signal
Output valve, A are Full-span output value.
By formula (4) it is found that the real signal value Vm of parameter to be measured is not by the power supply and modulus of sensor unit 10
The power supply of the reference voltage of converting unit 20 influences, so as to avoid the ripple due to power supply, temperature system
Number, null offset etc., which constitute the precision of measurement result and stability, to be influenced, without being equipped with the power supply of higher precision and stability
Power supply can not only improve measurement accuracy, can also reduce hardware spending, cost-effective.
It should be noted that in the embodiments of the present invention, sensor unit 10 may include temperature sensor and/
Or pressure sensor, parameter to be measured may include temperature and/or pressure.Certainly, sensor unit 10 can also include that speed passes
Sensor, liquid level sensor, acceleration transducer etc., parameter to be measured can also include speed, liquid level, acceleration etc., not do herein
Concrete restriction.
According to the signal sampling device of the utility model embodiment, parameter to be measured is detected in real time by sensor unit with defeated
Go out and detect signal, the reference voltage end of AD conversion unit packet be connected with the feeder ear of sensor unit after with preset ginseng
It examines power supply to be connected, AD conversion unit carries out analog-to-digital conversion with output digit signals to detection signal, and micro-control unit is according to number
The real signal value of word signal acquisition parameter to be measured.The reference voltage and sensing of the AD conversion unit of the device as a result,
Device unit is powered using common power supply, so as to so that measurement result is not influenced by reference power source, substantially increase
Measurement accuracy, and cost is relatively low.
In addition, the embodiments of the present invention also propose a kind of electrical equipment comprising above-mentioned signal sampling device.
The electrical equipment of the utility model embodiment, by above-mentioned signal sampling device, sensor unit and modulus turn
It changes unit to power using common reference power source, so as to so that measurement result is not influenced by power supply, substantially increase
Measurement accuracy, and cost is relatively low.
Fig. 3 is the flow chart according to the signal sampling method of the utility model one embodiment.As shown in figure 3, the signal
The method of sampling includes the following steps：
S1 detects parameter to be measured by sensor unit to export detection signal VO in real time.
Wherein, sensor unit may include temperature sensor and/or pressure sensor, and parameter to be measured may include temperature
And/or pressure.Certainly, sensor unit can also be to be measured including velocity sensor, liquid level sensor, acceleration transducer etc.
Parameter can also include speed, liquid level, acceleration etc., do not do and specifically limit herein.
It can be voltage signal or current signal to detect signal VO.
S2 carries out analog-to-digital conversion with output digit signals OUTCOAD by AD conversion unit to detection signal.Wherein,
As shown in Fig. 2, AD conversion unit includes reference voltage end, the feeder ear phase at reference voltage end and sensor unit
It is connected with preset reference power source VCC after even.
S3 obtains the real signal value Vm of parameter to be measured according to digital signal OUTCOAD.
In the embodiments of the present invention, the real signal value of parameter to be measured meets following formula (4)：
Vm=(OUTCODE/ACODE) * A (4)
Wherein, Vm is the real signal value of parameter to be measured, and OUTCODE is digital signal, and ACODE is full scale digital signal
Output valve, A are Full-span output value.
Specifically, the real signal value Vm general satisfactions following formula (1) of parameter to be measured：
Vm=(VO/V2) * A (1)
Wherein, Vm is the real signal value (such as pressure value, temperature value) of parameter to be measured, and VO is the output of sensor unit
Electric signal, A be sensor unit Full-span output value, V2 be sensor unit power supply voltage value.
The electric signal VO general satisfactions following formula (2) of the output of sensor unit：
VO=(OUTCODE/ACODE) * V1 (2)
Wherein, VO is the electric signal of the output of sensor unit, and OUTCODE is digital signal, and ACODE is full scale number
Signal value output, V1 are the voltage value of the power supply of the reference voltage of AD conversion unit (ADC).It will be apparent that modulus
The stability and precision of the power supply VCC1 of the reference voltage of converting unit (ADC) determines that micro-control unit (MCU) is adopted
Collect the stability and precision of digital signal OUTCODE.
Formula (2), which is substituted into formula (1), can obtain following formula (3)：
Wherein, Vm is the real signal value of parameter to be measured, and OUTCODE is digital signal, and ACODE is full scale digital signal
Output valve, V1 are the voltage value of the power supply of the reference voltage of AD conversion unit (ADC), and V2 is sensor unit
The voltage value of power supply.
And in the embodiments of the present invention, as shown in Fig. 2, sensor unit and AD conversion unit use jointly
Reference power source VCC power supplies, i.e. V1=V2, therefore, the real signal value Vm of parameter to be measured meet following formula (4)：
Vm=(OUTCODE/ACODE) * A (4)
Wherein, Vm is the real signal value of parameter to be measured, and OUTCODE is digital signal, and ACODE is full scale digital signal
Output valve, A are Full-span output value.
By formula (4) it is found that the real signal value Vm of parameter to be measured is not turned by the power supply of sensor unit and modulus
Changing the power supply of the reference voltage of unit influences, so as to avoid the ripple due to power supply, temperature coefficient, zero
Point drift etc., which constitutes the precision of measurement result and stability, to be influenced, without being equipped with the power supply of higher precision and stability,
Measurement accuracy can be not only improved, hardware spending can also be reduced, it is cost-effective.
According to the signal sampling method of the utility model embodiment, first, ginseng to be measured is detected in real time by sensor unit
Number carries out analog-to-digital conversion with output digit signals, modulus to export detection signal, then by AD conversion unit to detection signal
The reference voltage end of converting unit is connected after being connected with the feeder ear of sensor unit with preset reference power source, finally,
The real signal value of parameter to be measured is obtained according to digital signal.This method can make measurement result not by reference power source as a result,
It influences, substantially increases measurement accuracy, and cost is relatively low.
In the description of the present invention, it should be understood that term "center", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " suitable
The orientation or positional relationship of the instructions such as hour hands ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " is orientation based on ... shown in the drawings
Or position relationship, be merely for convenience of describing the present invention and simplifying the description, do not indicate or imply the indicated device or
Element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as the limit to the utility model
System.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.The meaning of " plurality " is at least two, such as two in the description of the present invention,
It is a, three etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be
Mechanical connection can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary two
The interaction relationship of connection or two elements inside element, unless otherwise restricted clearly.For the common skill of this field
For art personnel, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention unless specifically defined or limited otherwise, fisrt feature is "above" or "below" second feature
Can be that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, first is special
Sign second feature " on ", " top " and " above " can be fisrt feature and be directly above or diagonally above the second feature, or only
Indicate that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with
It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
It states and is necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with
It can be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this field
Technical staff can by the feature of different embodiments or examples described in this specification and different embodiments or examples into
Row combines and combination.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments.
Claims (5)
1. a kind of signal sampling device, which is characterized in that including：
Sensor unit, the sensor unit include feeder ear, the sensor unit by detect in real time parameter to be measured with
Output detection signal；
AD conversion unit, the AD conversion unit are connected with the sensor unit, and the AD conversion unit includes base
Quasi- reference voltage end, the reference voltage end be connected with the feeder ear of the sensor unit after with preset reference power source
It is connected, the AD conversion unit to the detection signal by carrying out analog-to-digital conversion with output digit signals；
Micro-control unit, the micro-control unit are connected with the AD conversion unit, and the micro-control unit is according to the number
The real signal value of parameter to be measured described in word signal acquisition.
2. signal sampling device as described in claim 1, which is characterized in that the sensor unit includes temperature sensor
And/or pressure sensor.
3. signal sampling device as claimed in claim 2, which is characterized in that the parameter to be measured includes temperature and/or pressure.
4. signal sampling device as claimed in any one of claims 1-3, which is characterized in that the detection signal is believed for voltage
Number or current signal.
5. a kind of electrical equipment, which is characterized in that include the signal sampling device as described in any one of claim 1-4.
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| CN201721721847.4U CN207923152U (en) | 2017-12-08 | 2017-12-08 | Signal sampling device and electrical equipment |
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| CN201721721847.4U CN207923152U (en) | 2017-12-08 | 2017-12-08 | Signal sampling device and electrical equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108088472A (en) * | 2017-12-08 | 2018-05-29 | 广东美的安川服务机器人有限公司 | Signal sampling device, method and electrical equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108088472A (en) * | 2017-12-08 | 2018-05-29 | 广东美的安川服务机器人有限公司 | Signal sampling device, method and electrical equipment |
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