CN209342222U - Electronic scale - Google Patents
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- CN209342222U CN209342222U CN201920153468.2U CN201920153468U CN209342222U CN 209342222 U CN209342222 U CN 209342222U CN 201920153468 U CN201920153468 U CN 201920153468U CN 209342222 U CN209342222 U CN 209342222U
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Abstract
The utility model embodiment discloses a kind of electronic scale, including first to fourth pressure sensor R4 is sequentially connected and constitutes full-bridge network, and the output end of first pressure sensor and the output end of third pressure sensor R3 are connected between power supply positive and negative anodes；Reference voltage circuit, the reference voltage circuit are connected between the power supply positive and negative anodes, and the reference voltage circuit includes a reference voltage output terminal；Microcontroller chip, the microcontroller chip is connected to the second output terminal of the second pressure sensor R2 and the 4th output end of the 4th pressure sensor R4, the microcontroller chip is also connected to the reference voltage output terminal, and the signal that the second output terminal of reference signal and second pressure sensor R2 that the microcontroller chip is provided according to reference voltage output terminal and the 4th output end of the 4th pressure sensor R4 provide calculates weighing weight W and weighing centre-of gravity shift parameter, Δ W；The utility model electronic scale can detecte gravity center of human body's offset.
Description
Technical field
The utility model embodiment is related to weighing field more particularly to a kind of electronic scale of human body weighing.
Background technique
With the improvement of people's living standards, weight has become the health data become more concerned in life.Mesh
The measurement of preceding weight mainly acquires measurement by the pressure sensor of resistance-strain type, has mechanical pointer, there is electronics
Digital.What electronic type human body balance generallyd use is that 4 pressure sensors pass through wiring one full-bridge of composition, i.e. " Hui Sitong
The power supply signal of electric bridge " two of them sensor connection motivates end, the output end of other two sensor, by the pressure of weighing object
The influence of power and the electric pressure signal for exporting variation, for calculating human body weight.However, the human body balance of the prior art cannot detect
The case where gravity center of human body deviates.
Therefore, a kind of electronic scale being able to detect gravity center of human body's offset becomes prior art technology urgently to be solved and asks
Topic.
Utility model content
The utility model embodiment provides a kind of electronic scale that can detecte gravity center of human body's offset.
A kind of electronic scale, comprising:
First pressure sensor, second pressure sensor, third pressure sensor and the 4th pressure sensor, described first
It is sequentially connected to the 4th pressure sensor and constitutes full-bridge network, the output end of first pressure sensor and third pressure sensor
Output end is connected between power supply positive and negative anodes；
Reference voltage circuit, the reference voltage circuit are connected between the power supply positive and negative anodes, described with reference to electricity
Volt circuit includes a reference voltage output terminal；
Microcontroller chip, the microcontroller chip is connected to the second output terminal of the second pressure sensor and the 4th pressure passes
4th output end of sensor, the microcontroller chip are also connected to the reference voltage output terminal, and the microcontroller chip is according to reference
The 4th of the reference signal of voltage output end offer and the second output terminal of second pressure sensor and the 4th pressure sensor
The signal that output end provides calculates weighing weight W and weighing centre-of gravity shift parameter, Δ W；
Display device, the display device be connected to microcontroller chip for show weigh and weigh centre-of gravity shift described in weight W
Parameter, Δ W.
Further, the display includes the first display area and the second display area, and first display area is used
In showing the weighing weight W, second display area is for showing weighing centre-of gravity shift parameter, Δ W.
Further, second display area is for showing " to the left ", " to the right ", " balance " three kinds of text informations with table
Show different weighing centre-of gravity shift parameters.
Further, second display area is for showing one of " to the left ", " to the right ", " balance " three kinds of human body images
To indicate different weighing centre-of gravity shift parameters.
Further, the microcontroller chip includes the first comparison amplifier, the second output of the second pressure sensor
End is connected to the first input end of the first comparison amplifier, and the reference voltage output terminal is connected to the of the first comparison amplifier
Two input terminals, when the electronic scale zero load, first comparison amplifier is for generating the first unloaded output S1_V0_ADC, institute
When stating electronic scale load-bearing, first comparison amplifier exports S1_V1_ADC for generating the first load-bearing.
Further, the microcontroller chip includes the second comparison amplifier, the 4th output of the 4th pressure sensor
End is connected to the first input end of the second comparison amplifier, and the reference voltage output terminal is connected to the of the second comparison amplifier
Two input terminals, when electronic scale zero load, second comparison amplifier is for generating the second unloaded output S0_V0_ADC, electronic scale
When load-bearing, second comparison amplifier exports S0_V1_ADC for generating the second load-bearing.
Further, the microcontroller chip further includes memory and computing unit, the output end of the first comparison amplifier and
The output end of second comparison amplifier is connected to memory,
The memory is for the unloaded output S1_V0_ADC=K* (S1_V0-V of storage first respectivelyref), the first load-bearing it is defeated
S1_V1_ADC=K* (S1_V1-V outref), the second unloaded output S0_V0_ADC=K* (S0_V0-Vref) and the second load-bearing it is defeated
S0_V1_ADC=K* (S0_V1-V outref), wherein K is amplification factor, second output terminal when S1_V0 is electronic scale zero load
Sensing signal, the sensing signal of second output terminal, V when S1_V1 is electronic scale load-bearingrefThe ginseng provided for reference voltage output terminal
Examine voltage signal；
The computing unit calculates the first load-bearing output and the first unloaded output according to the data that memory stores
Between the first weighing changing value Δ S1, the computing unit of the microcontroller chip is also used to calculate second load-bearing output and second
The second weighing changing value Δ S0 between zero load output, the computing unit of the microcontroller chip are also used to calculate first weighing
Total variation Δ S between the weighing of changing value Δ S1 and second changing value Δ S0, the computing unit of the microcontroller chip is according to institute
Weighing weight W, the first weighing changing value Δ S1, the second weighing changing value Δ S0 and total variation Δ S is stated to calculate described in acquisition
Weigh centre-of gravity shift parameter, Δ W.
Further, the microcontroller chip includes multichannel converter, third comparison amplifier, memory and calculates single
Member, the 4th output end and reference voltage output of the second output terminal of the second pressure sensor, the 4th pressure sensor
End is connected to the input terminal of the multichannel converter, and the output end of multichannel converter is connected to the two of third comparison amplifier
A input terminal, the output end of third comparison amplifier are connected to memory, and the multichannel converter can make the defeated of itself
The connection relationship for entering end and output end is converted between the first mode and the second mode；
Under first mode, multichannel converter can make the second output terminal of second pressure sensor be connected to third ratio
Compared with the first input end of amplifier, the reference voltage output terminal is connected to the second input terminal of third comparison amplifier；Electronics
When scale zero load, the third comparison amplifier is for generating the first unloaded output S1_V0_ADC=K* (S1_V0-Vref), it is described
When electronic scale load-bearing, the third comparison amplifier exports S1_V1_ADC=K* (S1_V1-V for generating the first load-bearingref),
Wherein, K is amplification factor, the sensing signal of second output terminal when S1_V0 is electronic scale zero load, when S1_V1 is electronic scale load-bearing
The sensing signal of second output terminal, VrefThe reference voltage signal provided for reference voltage output terminal Vref；
Under the second mode, the 4th output end of the 4th pressure sensor is connected to the first of third comparison amplifier
Input terminal, the reference voltage output terminal are connected to the second input terminal of third comparison amplifier, when electronic scale zero load, described
Three comparison amplifiers are for generating the second unloaded output S0_V0_ADC=K* (S0_V0-Vref), when electronic scale load-bearing, described
Three comparison amplifiers export S0_V1_ADC=K* (S0_V1-V for generating the second load-bearingref), when S0_V0 is electronic scale zero load
The sensing signal of 4th output end, the sensing signal of the 4th output end when S0_V1 is electronic scale load-bearing；
The memory is for the unloaded output S1_V0_ADC of storage first respectively, the first load-bearing output S1_V1_ADC, the
Two unloaded output S0_V0_ADC and the second load-bearing output S0_V1_ADC are calculated for computing unit.
Further, the electronic scale further includes bluetooth module, the personal information ginseng provided for receiving user from mobile phone
Number, the microcontroller chip generate user according to the personal information parameter, weighing weight W and weighing centre-of gravity shift parameter, Δ W
Physical exercise information, the display device is further used for showing personal information parameter and physical exercise information.
Further, the electronic scale further includes voice cue module, for people's information parameter, weighing weight W,
One of described weighing centre-of gravity shift parameter, Δ W physical exercise information or a variety of carry out voice promptings.
Compared with the existing technology, the electronic scale provided in the utility model embodiment is by increasing a reference voltage electricity
Road realizes the weighing center of gravity that accurate measurement user stands when weighing on the basis of not changing the circuit structure of existing electronic scale
Offset parameter Δ W, circuit it is simple and practical in structure, cost is relatively low.
Detailed description of the invention
Fig. 1 is the electrical block diagram for the electronic scale that the utility model embodiment one provides；
Fig. 2 is the electrical block diagram for the electronic scale that the utility model embodiment two provides；
Fig. 3 is the electrical block diagram for the electronic scale that the utility model embodiment three provides；
Fig. 4 is showing for multiple icons of the electronic scale display weighing centre-of gravity shift parameter, Δ W of the utility model embodiment three
It is intended to；
Fig. 5 is the electrical block diagram for the electronic scale that the utility model embodiment four provides；
Fig. 6 is the electrical block diagram of the microcontroller chip for the electronic scale that the utility model embodiment five provides.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It further needs exist for
It is bright, part relevant to the utility model is illustrated only for ease of description, in attached drawing rather than entire infrastructure.
It should be mentioned that some exemplary embodiments are described as before exemplary embodiment is discussed in greater detail
The processing or method described as flow chart.Although each step is described as the processing of sequence by flow chart, many of these
Step can be implemented concurrently, concomitantly or simultaneously.In addition, the sequence of each step can be rearranged.When its operation
The processing can be terminated when completion, it is also possible to have the additional step being not included in attached drawing.The processing can be with
Corresponding to method, function, regulation, subroutine, subprogram etc..
In addition, term " first ", " second " etc. can be used to describe herein various directions, movement, step or element etc.,
But these directions, movement, step or element should not be limited by these terms.These terms are only used to by first direction, movement, step
Rapid or element and another direction, movement, step or element are distinguished.For example, the case where not departing from scope of the present application
Under, it can be second speed difference by First Speed difference, and similarly, it is poor second speed difference can be known as First Speed
Value.First Speed difference and second speed difference both speed difference, but it is not same speed difference.Term " the
One ", " second " etc. is not understood to indicate or imply relative importance or implicitly indicates the number of indicated technical characteristic
Amount." first " is defined as a result, the feature of " second " can explicitly or implicitly include one or more of the features.
In the description of the present invention, the meaning of " plurality " is at least two, such as two, three etc., unless otherwise clearly specific
Restriction.
Embodiment one
With reference to Fig. 1, the present embodiment provides a kind of electronic scale, the electronic scale of the present embodiment include first pressure sensor R1,
Second pressure sensor R2, third pressure sensor R3 and the 4th pressure sensor R4.Four pressure sensors in the present embodiment
R1-R4 can be fixed in a weighing plane, and the fixed point position of four pressure sensor R1-R4 can form a rectangle
Or it is rectangular.First to fourth pressure sensor R1-R4 described in the present embodiment, which is sequentially connected end to end, constitutes full-bridge network.The present embodiment
In, the pressure-sensing resistance head and the tail of four pressure sensor R1-R4 constitute Wheatstone bridge after being sequentially connected in series.First pressure sensing
Device R1 includes the first output end E1, and second pressure sensor R2 includes second output terminal S1, and third pressure sensor R3 includes the
Three output end E0, the 4th pressure sensor R4 include the 4th output end S0.The first of the first pressure sensor R1 of the present embodiment
The third output end E0 of output end E1 and third pressure sensor R3 is connected between power supply B1 positive and negative anodes V+, V-, such as
The first output end E1 of first pressure sensor R1 is connected to the positive V+ of power supply, the third output end of third pressure sensor R3
E0 is connected to the cathode V- of power supply.The 4th of the second output terminal S1 and the 4th pressure sensor R4 of second pressure sensor R2
Output end S0 is for generating different sensing signals according to the weight of human body to be measured.First pressure sensor R1 in the present embodiment,
Second pressure sensor R2, third pressure sensor R3 and the 4th pressure sensor R4 use single armed sensor.
In the present embodiment, electronic scale further includes a reference voltage circuit, and the reference voltage circuit is connected to power supply
Between B1 positive and negative anodes V+, V-, the reference voltage circuit includes a reference voltage output terminal Vref.Specifically, the present embodiment is joined
Examining potential circuit includes concatenated 5th resistance R5 and the 6th resistance R6.One end of 5th resistance R5 is connected to the first output end
The other end of E1, the 5th resistance R5 are connected to one end of the 6th resistance R6, and the other end of the 6th resistance R6 is connected to third output
Hold E0.The resistance value of the 5th resistance R5 and the 6th resistance R6 of the present embodiment are equal, between the 5th resistance R5 and the 6th resistance R6
Output end Vref is used to export half supply voltage node as the reference voltage.
The electronic scale of the present embodiment further includes microcontroller chip M1, and the microcontroller chip M1 is connected to the second pressure sensing
The 4th output end S0 of the second output terminal S1 and the 4th pressure sensor R4 of device R2.The microcontroller chip M1 is also connected to institute
State reference voltage output terminal Vref.When user measures weight, stand directly in weighing plane, pressure can be assigned to four sensings
Device R1-R4, the microcontroller chip M1 of the present embodiment is according to the reference voltage output terminal Vref reference signal provided and second pressure
The weighing-up wave that the 4th output end S0 of the second output terminal S1 and the 4th pressure sensor R4 of sensor R2 are provided can calculate
Weigh weight W and weighing centre-of gravity shift parameter, Δ W, is described in detail below.
Microcontroller chip M1 includes the second output terminal S1 connection of the first comparison amplifier C1, the second pressure sensor R2
To the first input end of the first comparison amplifier C1, the reference voltage output terminal Vref is connected to the first comparison amplifier C1
The second input terminal.When electronic scale zero load, the first comparison amplifier C1 is for generating the first unloaded output S1_V0_ADC
=K* (S1_V0-Vref), when the electronic scale load-bearing, the first comparison amplifier C1 exports S1_ for generating the first load-bearing
V1_ADC=K* (S1_V1-Vref), wherein K is amplification factor, the sensing of second output terminal S1 when S1_V0 is electronic scale zero load
Signal, the sensing signal of second output terminal S1, V when S1_V1 is electronic scale load-bearingrefIt is provided for reference voltage output terminal Vref
Reference voltage signal.
Microcontroller chip M1 further includes that the 4th output end S0 of the second comparison amplifier C2, the 4th pressure sensor R4 connects
It is connected to the first input end of the second comparison amplifier C2, the reference voltage output terminal Vref is connected to the second comparison amplifier C2
The second input terminal.When electronic scale zero load, the second comparison amplifier C2 is for generating the second unloaded output S0_V0_ADC
=K* (S0_V0-Vref), when electronic scale load-bearing, the second comparison amplifier C2 exports S0_V1_ for generating the second load-bearing
ADC=K* (S0_V1-Vref).Wherein, K is amplification factor, the sensing letter of the 4th output end S0 when S0_V0 is electronic scale zero load
Number, the sensing signal of the 4th output end S0, V when S0_V1 is electronic scale load-bearingrefThe ginseng provided for reference voltage output terminal Vref
Examine voltage signal.
The present embodiment, microcontroller chip M1 further include memory RAM and computing unit U1, the output of the first comparison amplifier C1
The output end of end and the second comparison amplifier C2 are connected to memory RAM, and the memory RAM is empty for storage first respectively
Carry output S1_V0_ADC=K* (S1_V0-Vref), the first load-bearing export S1_V1_ADC=K* (S1_V1-Vref), it is second unloaded
Export S0_V0_ADC=K* (S0_V0-Vref) and the second load-bearing output S0_V1_ADC=K* (S0_V1-Vref), wherein K is to put
Big multiple, the sensing signal of second output terminal when S1_V0 is electronic scale zero load, second output terminal when S1_V1 is electronic scale load-bearing
Sensing signal, VrefThe reference voltage signal provided for reference voltage output terminal Vref.
The second output terminal S1 of the second pressure sensor R2 is connected to the 4th comparison amplifier C4's by microcontroller chip
First input end, the 4th output end S0 of the 4th pressure sensor R4 are connected to the second input of the 4th comparison amplifier C4
End, when electronic scale zero load, the 4th comparison amplifier C4 is for generating total unloaded output S1_S0_V0_ADC, the electronic scale
When load-bearing, the 4th comparison amplifier C4 is for generating total load-bearing output S1_S0_V1_ADC, and computing unit U1 is according to S1_
Difference between S0_V1_ADC and S1_S0_V0_ADC converses carried total weight W=S1_S0_V1_ADC-S1_S0_V0_
ADC。
The computing unit U1 of microcontroller chip M1 calculates first load-bearing according to the data that memory stores and exports S1_V1_
The first weighing changing value Δ S1=S1_V1_ADC-S1_V0_ADC between the unloaded output S1_V0_ADC of ADC and first, it is described
The computing unit U1 of microcontroller chip M1 is also used to calculate the second load-bearing output S0_V1_ according to the data that memory stores
The second weighing changing value Δ S0=S0_V1_ADC-S0_V0_ADC between the unloaded output S0_V0_ADC of ADC and second.
The computing unit U1 of microcontroller chip M1 is also used to calculate the first weighing variation according to the data that memory stores
The total variation Δ S=Δ S1- Δ S0 being worth between the weighing of Δ S1 and second changing value Δ S0, the calculating of the microcontroller chip M1
Unit U1 is according to the weighing weight W, the first weighing changing value Δ S1, the second weighing changing value Δ S0 and total variation Δ S
It calculates and obtains the weighing centre-of gravity shift parameter, Δ W.The weighing centre-of gravity shift parameter, Δ W calculation of the present embodiment is as follows:
W1=(Δ S1/ Δ S) * W,
W0=(Δ S0/ Δ S) * W,
Δ W=W1-W0
Compared with the existing technology, the electronic scale of the present embodiment is existing not changing by increasing a reference voltage circuit
The weighing centre-of gravity shift parameter, Δ W that accurate measurement human body is stood when weighing is realized on the basis of the circuit structure for having electronic scale,
Circuit it is simple and practical in structure, cost is relatively low.
Embodiment two
With reference to Fig. 2, the present embodiment provides another electronic scale, the electronic scale of the present embodiment includes first pressure sensor
R1, second pressure sensor R2, third pressure sensor R3 and the 4th pressure sensor R4.Four pressure sensings in the present embodiment
Device R1-R4 can be fixed in a weighing plane, and the fixed point position of four pressure sensor R1-R4 can form a square
Shape is rectangular, and first to fourth pressure sensor R1-R4 described in the present embodiment, which is sequentially connected, constitutes full-bridge network, i.e. favour stone electricity
Bridge.In the present embodiment, the pressure-sensing resistance head and the tail of four pressure sensor R1-R4 constitute full-bridge network after being sequentially connected in series, the
One pressure sensor R1 includes the first output end E1, and second pressure sensor R2 includes second output terminal S1, third pressure sensing
Device R3 includes third output end E0, and the 4th pressure sensor R4 includes the 4th output end S0.The first pressure of the present embodiment senses
The third output end E0 of the first output end E1 and third pressure sensor R3 of device R1 are connected between power supply B1 positive and negative anodes,
Such as the first output end E1 of first pressure sensor R1 is connected to the positive V+ of power supply, the third of third pressure sensor R3
Output end E0 is connected to the cathode V- of power supply.The second output terminal S1's and the 4th pressure sensor R4 of second pressure sensor R2
4th output end S0 is for generating different sensing signals according to the weight of human body to be measured.First pressure sensor in the present embodiment
R1, second pressure sensor R2, third pressure sensor R3 and the 4th pressure sensor R4 use single armed sensor.
In the present embodiment, electronic scale further includes a reference voltage circuit, and the reference voltage circuit is connected to power supply
Between B1 positive and negative anodes, the reference voltage circuit includes a reference voltage output terminal Vref.Specifically, the present embodiment reference voltage
Circuit includes concatenated 5th resistance R5 and the 6th resistance R6, and one end of the 5th resistance R5 is connected to the first output end E1, and the 5th
The other end of resistance R5 is connected to one end of the 6th resistance R6, and the other end of the 6th resistance R6 is connected to third output end E0.This
The resistance value of the 5th resistance R5 and the 6th resistance R6 of embodiment are equal, the node conduct between the 5th resistance R5 and the 6th resistance R6
Reference voltage output terminal Vref is for exporting half supply voltage.
The electronic scale of the present embodiment further includes microcontroller chip M1, and the microcontroller chip M1 is connected to the second pressure sensing
The 4th output end S0 of the second output terminal S1 and the 4th pressure sensor R4 of device R2.The microcontroller chip M1 is also connected to described
Reference voltage output terminal Vref.When user measures weight, stand directly in weighing plane, pressure can be assigned to four sensings
Device, the microcontroller chip M1 of the present embodiment is according to the reference voltage output terminal Vref reference signal provided and second pressure sensor
The weighing-up wave that the 4th output end S0 of the second output terminal S1 and the 4th pressure sensor R4 of R2 are provided can calculate weighing weight
Measure W and weighing centre-of gravity shift parameter, Δ W.
The difference is that, the microcontroller chip M1 of the present embodiment includes multichannel converter T1, third with first embodiment
Comparison amplifier C3, memory RAM and computing unit U1, the second output terminal S1 of the second pressure sensor R2, the 4th pressure
The 4th output end S0 and reference voltage output terminal Vref of force snesor R4 are connected to the input of the multichannel converter T1
End, the output end of multichannel converter T1 are connected to two input terminals of third comparison amplifier C3, third comparison amplifier C3
Output end be connected to memory RAM.In the present embodiment, the multichannel converter T1 can make the input terminal and defeated of itself
The connection relationship of outlet is converted between the first mode and the second mode.In alternate embodiment, multichannel converter T1 can be
Two, two input terminals of third comparison amplifier C3 are separately connected, for controlling two of third comparison amplifier C3 respectively
The unlike signal of each clock cycle input of input terminal.
Under first mode, multichannel converter T1 can make the second output terminal S1 of second pressure sensor R2 be connected to
The first input end of third comparison amplifier C3, the reference voltage output terminal Vref are connected to the of third comparison amplifier C3
Two input terminals.When electronic scale zero load, the third comparison amplifier C3 is for generating the first unloaded output S1_V0_ADC=K*
(S1_V0-Vref), when the electronic scale load-bearing, the third comparison amplifier C3 exports S1_V1_ for generating the first load-bearing
ADC=K* (S1_V1-Vref).Wherein, K is amplification factor, the sensing letter of second output terminal S1 when S1_V0 is electronic scale zero load
Number, the sensing signal of second output terminal S1, V when S1_V1 is electronic scale load-bearingrefThe ginseng provided for reference voltage output terminal Vref
Examine voltage signal.
Under the second mode, the 4th output end S0 of the 4th pressure sensor R4 is connected to third comparison amplifier C3
First input end, the reference voltage output terminal Vref is connected to the second input terminal of third comparison amplifier C3.Electronic scale
When unloaded, the third comparison amplifier C3 is for generating the second unloaded output S0_V0_ADC=K* (S0_V0-Vref), electronics
When scale load-bearing, the third comparison amplifier C3 exports S0_V1_ADC=K* (S0_V1-V for generating the second load-bearingref).Its
In, K is amplification factor, the sensing signal of the 4th output end S0 when S0_V0 is electronic scale zero load, when S0_V1 is electronic scale load-bearing
The sensing signal of 4th output end S0, VrefThe reference voltage signal provided for reference voltage output terminal Vref.
The memory is for the unloaded output S1_V0_ADC=K* (S1_V0-V of storage first respectivelyref), the first load-bearing it is defeated
S1_V1_ADC=K* (S1_V1-V outref), the second unloaded output S0_V0_ADC=K* (S0_V0-Vref) and the second load-bearing it is defeated
S0_V1_ADC=K* (S0_V1-V outref) calculated for computing unit U1.
Under the third mode, second output terminal S1 and the 4th output end S0 be respectively connected to third comparison amplifier C3 two are defeated
Enter end, when electronic scale zero load, third comparison amplifier C3 output is unloaded weighing W0, and when electronic scale load-bearing, third compares amplification
Device C3 output is load weighing W1.When electronic scale zero load, the third comparison amplifier C3 is for generating total unloaded output S1_
S0_V0_ADC, when the electronic scale load-bearing, the third comparison amplifier C3 is for generating total load-bearing output S1_S0_V1_
ADC, computing unit U1 converse carried total weight W=according to the difference between S1_S0_V1_ADC and S1_S0_V0_ADC
S1_S0_V1_ADC-S1_S0_V0_ADC。
It is unloaded defeated that the computing unit U1 of microcontroller chip M1 is also used to calculate the first load-bearing output S1_V1_ADC and first
The first weighing changing value Δ S1=S1_V1_ADC-S1_V0_ADC between S1_V0_ADC out.
The computing unit U1 of microcontroller chip M1 is also used to calculate the second weighing changing value Δ S0=S0_V1_ADC-S0_V0_
ADC.The computing unit U1 of the microcontroller chip M1 is also used to calculate the first weighing changing value Δ S1 and the second weighing variation
It is worth the computing unit U1 of total variation Δ S=Δ S1- the Δ S0, the microcontroller chip M1 between Δ S0 according to weighing weight
W, the first weighing changing value Δ S1, the second weighing changing value Δ S0 and total variation Δ S is measured to calculate and obtain the weighing center of gravity
Offset parameter Δ W.The weighing centre-of gravity shift parameter, Δ W calculation of the present embodiment is as follows:
W1=(Δ S1/ Δ S) * W,
W0=(Δ S0/ Δ S) * W,
Δ W=W1-W0
Compared with the existing technology, the microcontroller chip M1 multichannel converter T1 of the electronic scale of the present embodiment calculates input single
The signal of first U1 switches over, and simplifies circuit structure, can further reduced the body cost that chip uses.
Embodiment three
With reference to Fig. 3-4, electronic scale provided in this embodiment further comprises display device D1, the display device D1 connection
To microcontroller chip M1 for showing weighing weight W and weighing centre-of gravity shift parameter, Δ W.Specifically, display device D1 includes first
Display area 31 and the second display area 32, first display area is for showing the weighing weight W, second display
Region is for showing weighing centre-of gravity shift parameter, Δ W.In preferred embodiment, second display area for show " to the left ",
Three kinds of text informations of " to the right ", " balance " are to indicate different weighing centre-of gravity shift parameters.In alternate embodiment, described second is aobvious
Show region for showing one of " to the left " 41 as shown in Figure 4, " to the right " 42, " balance " 43 3 kinds of human body images, with table
Show different weighing centre-of gravity shift parameters.The image of the display of the electronic scale of the present embodiment is lively, has allowed users to preferable
Usage experience.
Example IV
With reference to Fig. 5, electronic scale provided in this embodiment further comprises bluetooth module BT, and bluetooth module BT is used for receiving
The personal information parameter, such as height, weight, age etc. that family is provided from mobile phone, the microcontroller chip M1 is according to the personal letter
Cease the physical exercise information that parameter, weighing weight W and the centre-of gravity shift parameter, Δ W that weighs generate user.The display device
D1 is further used for showing personal information parameter and physical exercise information, for example, weighing user can take exercise daily 10 minutes or
Weighing user is not necessarily to carry out balsting at present.The present embodiment, electronic scale still further comprise voice cue module SP, are used for
Language is carried out to people's information parameter, weighing weight W, the weighing centre-of gravity shift parameter, Δ W and physical exercise information alert
Sound prompt.The voice cue module of the present embodiment facilitates weighing user from understanding weighing by all kinds of means as a result, facilitating difference
The usage experience of user, wide adaptability.
Embodiment five
With reference to Fig. 6, on the basis of example 2, the microcontroller chip M1 of electronic scale provided in this embodiment includes multichannel
Converter T1, third comparison amplifier C3, analog-digital converter ADC, filter F, memory RAM and computing unit U1.Multichannel
The connection relationship and embodiment two of the input terminal of converter T1 are identical, and the output end of multichannel converter T1 is connected to third and compares
The output end of two input terminals of amplifier C3, third comparison amplifier C3 is connected to the input terminal of analog-digital converter ADC, modulus
The output end of converter ADC is connected to memory RAM.The analog signal exported from comparison amplifier C3 in the present embodiment passes through
Number converter ADC is converted to digital signal and stores after carrying out noise-removed filtering into memory RAM, so as to computing unit U1 root
It reads according to needs for calculating.
It is worth noting that, included each unit and module are only in the embodiment of above-mentioned meter information display device
It is to be divided according to the functional logic, but be not limited to the above division, as long as corresponding functions can be realized；Separately
Outside, the specific name of each functional unit is also only for convenience of distinguishing each other, the protection model being not intended to limit the utility model
It encloses.
Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment here, is able to carry out for a person skilled in the art various apparent
Variation is readjusted and is substituted without departing from the protection scope of the utility model.Therefore, although by above embodiments to this
Utility model is described in further detail, but the utility model is not limited only to above embodiments, is not departing from this reality
It can also include more other equivalent embodiments in the case where with novel design, and the scope of the utility model is by appended power
Sharp claimed range determines.
Claims (10)
1. a kind of electronic scale, characterized by comprising:
First pressure sensor, second pressure sensor, third pressure sensor and the 4th pressure sensor, described first to
Four pressure sensors, which are sequentially connected, constitutes full-bridge network, the output of the output end and third pressure sensor of first pressure sensor
End is connected between power supply positive and negative anodes；
Reference voltage circuit, the reference voltage circuit are connected between the power supply positive and negative anodes, the reference voltage electricity
Road includes a reference voltage output terminal；
Microcontroller chip, the microcontroller chip are connected to the second output terminal and the 4th pressure sensor of the second pressure sensor
The 4th output end, the microcontroller chip is also connected to the reference voltage output terminal, and the microcontroller chip is according to reference voltage
The second output terminal of reference signal and second pressure sensor that output end provides and the 4th output of the 4th pressure sensor
The signal that end provides calculates weighing weight W and weighing centre-of gravity shift parameter, Δ W；
Display device, the display device be connected to microcontroller chip for show weighing weight W described in weigh centre-of gravity shift parameter
ΔW。
2. electronic scale according to claim 1, which is characterized in that the display device includes the first display area and second
Display area, first display area is for showing the weighing weight W, and second display area is for showing weighing weight
Heart offset parameter Δ W.
3. electronic scale according to claim 2, which is characterized in that second display area for show " to the left ", " partially
The right side ", " balance " three kinds of text informations are to indicate different weighing centre-of gravity shift parameters.
4. electronic scale according to claim 2, which is characterized in that second display area for show " to the left ", " partially
One of the right side ", " balance " three kinds of human body images are to indicate different weighing centre-of gravity shift parameters.
5. electronic scale according to claim 1, which is characterized in that the microcontroller chip includes the first comparison amplifier, institute
The second output terminal for stating second pressure sensor is connected to the first input end of the first comparison amplifier, the reference voltage output
End is connected to the second input terminal of the first comparison amplifier, and when the electronic scale zero load, first comparison amplifier is for producing
Raw first unloaded output S1_V0_ADC, when the electronic scale load-bearing, first comparison amplifier is defeated for generating the first load-bearing
S1_V1_ADC out.
6. electronic scale according to claim 5, which is characterized in that the microcontroller chip includes the second comparison amplifier, institute
The 4th output end for stating the 4th pressure sensor is connected to the first input end of the second comparison amplifier, the reference voltage output
End is connected to the second input terminal of the second comparison amplifier, and when electronic scale zero load, second comparison amplifier is for generating the
Two unloaded output S0_V0_ADC, when electronic scale load-bearing, second comparison amplifier exports S0_V1_ for generating the second load-bearing
ADC。
7. electronic scale according to claim 6, which is characterized in that microcontroller chip further includes memory and computing unit, and
The output end of the output end of one comparison amplifier and the second comparison amplifier is connected to memory,
The memory is for unloaded output S1_V0_ADC=K* (S1_V0-Vref) of storage first respectively, the first load-bearing output
S1_V1_ADC=K* (S1_V1-Vref), the second unloaded output S0_V0_ADC=K* (S0_V0-Vref) and the second load-bearing output
S0_V1_ADC=K* (S0_V1-Vref), wherein K is amplification factor, the sense of second output terminal when S1_V0 is electronic scale zero load
Signal is surveyed, the sensing signal of second output terminal when S1_V1 is electronic scale load-bearing, Vref is the reference that reference voltage output terminal provides
Voltage signal；
The computing unit calculates between the first load-bearing output and the first unloaded output according to the data that memory stores
First weighing changing value Δ S1, the computing unit of the microcontroller chip are also used to calculate the second load-bearing output and the second zero load
The second weighing changing value Δ S0 between output, the computing unit of the microcontroller chip are also used to calculate the first weighing variation
The total variation Δ S being worth between the weighing of Δ S1 and second changing value Δ S0, the computing unit of the microcontroller chip is according to the title
Heavy amount W, the first weighing changing value Δ S1, the second weighing changing value Δ S0 and total variation Δ S are calculated and are obtained the weighing
Centre-of gravity shift parameter, Δ W.
8. electronic scale according to claim 1, which is characterized in that microcontroller chip includes that multichannel converter, third compare
Amplifier, memory and computing unit, the second output terminal of the second pressure sensor, the 4th pressure sensor it is the 4th defeated
Outlet and reference voltage output terminal are connected to the input terminal of the multichannel converter, the output end connection of multichannel converter
To two input terminals of third comparison amplifier, the output end of third comparison amplifier is connected to memory, and the multichannel turns
Parallel operation can make the input terminal of itself and the connection relationship of output end convert between the first mode and the second mode；
Under first mode, multichannel converter can the second output terminal of second pressure sensor be connected to third relatively to put
The first input end of big device, the reference voltage output terminal are connected to the second input terminal of third comparison amplifier；Electronic scale is empty
When load, the third comparison amplifier is for generating the first unloaded output S1_V0_ADC=K* (S1_V0-Vref), the electronics
When scale load-bearing, the third comparison amplifier exports S1_V1_ADC=K* (S1_V1-Vref) for generating the first load-bearing,
In, K is amplification factor, the sensing signal of second output terminal when S1_V0 is electronic scale zero load, the when S1_V1 is electronic scale load-bearing
The sensing signal of two output ends, Vref are the reference voltage signal that reference voltage output terminal Vref is provided；
Under the second mode, the 4th output end of the 4th pressure sensor is connected to the first input of third comparison amplifier
End, the reference voltage output terminal are connected to the second input terminal of third comparison amplifier, when electronic scale zero load, the third ratio
Compared with amplifier for generating the second unloaded output S0_V0_ADC=K* (S0_V0-Vref), when electronic scale load-bearing, the third ratio
Compared with amplifier for generating the second load-bearing output S0_V1_ADC=K* (S0_V1-Vref), the 4th when S0_V0 is electronic scale zero load
The sensing signal of output end, the sensing signal of the 4th output end when S0_V1 is electronic scale load-bearing；
The memory is used for the unloaded output S1_V0_ADC of storage first respectively, the first load-bearing output S1_V1_ADC, the second sky
It carries output S0_V0_ADC and the second load-bearing output S0_V1_ADC is calculated for computing unit.
9. electronic scale according to any one of claims 1 to 8, it is characterised in that: further comprise bluetooth module, be used for
The personal information parameter that there is provided from mobile phone of user is provided, the microcontroller chip according to the personal information parameter, weigh weight W with
And weighing centre-of gravity shift parameter, Δ W generates the physical exercise information of user, the display device is further used for showing personal letter
Cease parameter and physical exercise information.
10. electronic scale according to claim 9, which is characterized in that further comprise voice cue module, for described
One of people's information parameter, weighing weight W, described weighing centre-of gravity shift parameter, Δ W physical exercise information or a variety of carry out languages
Sound prompt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920153468.2U CN209342222U (en) | 2019-01-29 | 2019-01-29 | Electronic scale |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920153468.2U CN209342222U (en) | 2019-01-29 | 2019-01-29 | Electronic scale |
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| CN209342222U true CN209342222U (en) | 2019-09-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109655140A (en) * | 2019-01-29 | 2019-04-19 | 深圳市伊欧乐科技有限公司 | Electronic scale |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109655140A (en) * | 2019-01-29 | 2019-04-19 | 深圳市伊欧乐科技有限公司 | Electronic scale |
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