CN2256530Y - Hand-held electronic scale - Google Patents
Hand-held electronic scale Download PDFInfo
- Publication number
- CN2256530Y CN2256530Y CN 96202143 CN96202143U CN2256530Y CN 2256530 Y CN2256530 Y CN 2256530Y CN 96202143 CN96202143 CN 96202143 CN 96202143 U CN96202143 U CN 96202143U CN 2256530 Y CN2256530 Y CN 2256530Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- analog
- digital conversion
- electronic scales
- conversion circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The utility model belongs to a hand-held electronic scale, mainly composed of a sensor, a measuring circuit, an A/D converting circuit and a display. Metalstrain foils are used as sensing elements and are arranged on an elastomer on a metal sheet, and the strain foils and a resistance form an electric bridge circuit. When the elastomer generates deformation due to receiving force, the deformation is converted into electric quantity by the strain foils, and the utility model displays the weight value of the elastomer after the electric quantity is processed by a circuit. The hand-held electronic scale has the advantages that the weighing result is not affected by the voltage of a battery, the battery has low pow consumption and long service life, the sensor has simple structure and measuring circuit, the utility model has high measuring precision, small size, light weight, low cost, convenient carrying, etc.
Description
The utility model belongs to a kind of portable electronic scales of the usefulness that calculates the weight.
Electronics measuring weighing instrument of the prior art of a great variety as electronic platform scale, has a portable electronic scales with the utility model is immediate, is weigher of portable or portable class or the like in addition.But, portable electronic scales of the prior art mostly has been to use one-chip computer or dedicated IC chip, thereby all has a function of electronic platform scale, follow the tracks of as automatic zero point, show unit price and total price, price adds up etc., thereby must make that portable electronic scales of the prior art has that circuit complexity, volume are big, complex structure, the high deficiency of price, therefore is difficult for being accepted by ordinarily resident and individual traders and pedlars.Hand spring scale then has big, the inaccurate defective of error in dipping.Steelyard has then been listed in the ranks of being cancelled by time limit by country, must not produce and use from now on.Therefore, in the market circulation industry of China, press for a kind of portable portable electronic scales, with the deficiency that remedies the sub-platform balance in Shen with satisfy needs of economic activities.
The purpose of this utility model is exactly to design a kind of portable electronic scales that be convenient for carrying, simple in structure, that price is low for the demand that satisfies this market.
The said portable electronic scales of the utility model is mainly by sensor, signal amplification circuit, and zero setting/peeling circuit, A/D analog to digital conversion circuit and display are formed.Said sensor is by elastic body 1 and metal strain plate d
1, d
2Form, elastic body 1 forms metal strain plate d by cut out distortion groove 4 on a sheet metal 3
1, d
2Be arranged on the two sides of elastic body 1, elastic body 1 is provided with a hooking device 5, as shown in Figure 1; Said metal strain plate d
1, d
2With the resistance R in the circuit in the accompanying drawing 2
1, R
2Form bridge diagram, bridge diagram and potentiometer W and power supply V that reference voltage is provided
C1Be connected metal strain plate d in the bridge diagram
1, d
2Common port and resistance R
1, R
2Common port be connected with the input end of amplifying circuit 6, between the input end of amplifying circuit 6 and the output terminal resistance R is arranged
3, the input end of amplifying circuit 6 and common port V
COMBetween resistance R is arranged
4, the output terminal of amplifying circuit 6 and common port V
COMBetween be serially connected with capacitor C
1And C
2, capacitor C 2 two ends are connected with analog to digital conversion circuit 7, at C
2Two ends also can be connected to zero setting/peeling K switch, analog to digital conversion circuit 7 and power supply V
C1The reference voltage signal V that dividing potential drop obtains on potentiometer W
RcfEnd is connected, to adjust reference voltage; The output terminal of analog to digital conversion circuit 7 is connected with display 8.Said amplifying circuit 6 and analog to digital conversion circuit 7 are by power supply V
C2Power supply is provided.
The said portable electronic scales principle of work of the utility model is, the two ends of sheet metal 3 are shelved on the stilt 10, after hooking device 5 on being arranged on elastic body 1 had born weight, elastic body 1 deformed, and was arranged on the metal strain plate d on elastic body 1 two sides this moment
1, d
2This deflection is converted into resistance change, makes the electric bridge imbalance, be converted into change in voltage by electric bridge, deliver to amplifying circuit 6, the input signal of amplifying circuit 6 is V
mMeasuring bridge can be by a battery V independently
C1Power supply, this power supply provides one and is proportional to battery V after potentiometer W dividing potential drop
C1Reference voltage signal V
RcfBecause the said technology of the utility model is the kind double integrator pattern number conversion circuit that adopts, its measuring-signal is V
m, reference signal is V
Ref, the displayed value N of output is proportional to V
m/ V
Ref, therefore, displayed value N just only is proportional to gravimetric value, and with cell voltage V
C1Irrelevant.
Zero setting/peeling is by being connected capacitor C
2The K switch at two ends realizes.Because V
mBy keyswitch and V
COMLink to each other, when button is pressed switch connection, V
m=V
COM, be output as zero; When button unclamps, switch disconnects, and during the output Vout no change of prime amplifier, the output V of amplifying circuit 6
mTo remain unchanged, promptly be shown as zero, at this moment add, then its output V if any weight
mAlso respective change, and have
So just realized zero setting/peeling function.
The said portable electronic scales of the utility model has following advantage: 1. weighing result is not subjected to the influence that cell voltage descends; 2. the sensor power consumption is little, thereby the power consumption of battery is also little, and the serviceable life of battery is longer; 3. sensor construction is simple, makes handling ease, dependable performance, and cost is low; 4. metering circuit is simple, and element is few, but measuring accuracy height, stable performance; 5. machine volume is little, and is in light weight, with low cost, easy to carry, is suitable for using in the daily life environment.
Accompanying drawing 1: sensor and metal strain plate synoptic diagram;
Accompanying drawing 2: metering circuit principal diagram intention.
Metal strain plate in the said portable electronic scales of the utility model also can adopt four form, will be connected into electric bridge after its corresponding connection.Said two groups of power supplys also can adopt one group of utility power.But because said power supply V
C1Power consumption is bigger, so the embodiment of said two groups of power supplys is good than the scheme of use group power supply in the technology of the present invention constitutes.
Claims (6)
1, a kind of portable electronic scales is made up of sensor, metering circuit, A/D analog to digital conversion circuit and display, it is characterized in that, said sensor is by elastic body (1) and metal strain plate (d
1, d
2) form, elastic body (1) is to cut out distortion groove (4) to form on a sheet metal (3), sheet metal (3) is shelved on the stilt (10), metal strain plate (d
1, d
2) being arranged on the two sides of elastic body (1), elastic body (1) is provided with a hooking device (5), said metal strain plate (d
1, d
2) with metering circuit in resistance (R
1, R
2) the composition bridge diagram.
According to the said electronic scales of claim 1, it is characterized in that 2, said metering circuit comprises signal amplifier, A/D analog to digital conversion circuit, bridge diagram and potentiometer (W) and power supply (V that reference voltage is provided
C1) be connected metal strain plate (d in the bridge diagram
1, d
2) common port and resistance (R
1, R
2) common port be connected the output terminal of amplifying circuit (6) and common port (V with the input end of amplifying circuit (6)
COM) between be serially connected with electric capacity (C
1And C
2), capacitor (C
2) two ends are connected with analog to digital conversion circuit (7), analog to digital conversion circuit (7) and power supply (V
C1) go up the reference voltage signal (V that dividing potential drop obtains at potentiometer (W)
Ref) end be connected, the output terminal of analog to digital conversion circuit (7) is connected with display (8).
According to the said electronic scales of claim 1, it is characterized in that 3, the foil gauge on said metallic elastic body can be two, also can be four, and when said foil gauge was four, said bridge diagram all was made up of foil gauge.
4, according to the said electronic scales of claim 2, it is characterized in that, at said electric capacity (C
2) two ends also can be connected to zero setting/peeling switch (K),
According to the said electronic scales of claim 2, it is characterized in that 5, said metering circuit adopts two groups of power supplys to provide power supply to electric bridge and amplifying circuit, analog to digital conversion circuit respectively.
According to the said electronic scales of claim 2, it is characterized in that 6, said metering circuit adopts one group of power supply to provide power supply to electric bridge and amplifying circuit, analog to digital conversion circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96202143 CN2256530Y (en) | 1996-01-16 | 1996-01-16 | Hand-held electronic scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96202143 CN2256530Y (en) | 1996-01-16 | 1996-01-16 | Hand-held electronic scale |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2256530Y true CN2256530Y (en) | 1997-06-18 |
Family
ID=33888208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96202143 Expired - Fee Related CN2256530Y (en) | 1996-01-16 | 1996-01-16 | Hand-held electronic scale |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2256530Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162778A (en) * | 2013-03-18 | 2013-06-19 | 朱颖晖 | Handle electronic balance |
| CN113624397A (en) * | 2021-08-16 | 2021-11-09 | 苏州司南传感科技有限公司 | Silicon piezoresistive pressure sensor calibration compensation method |
-
1996
- 1996-01-16 CN CN 96202143 patent/CN2256530Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162778A (en) * | 2013-03-18 | 2013-06-19 | 朱颖晖 | Handle electronic balance |
| CN113624397A (en) * | 2021-08-16 | 2021-11-09 | 苏州司南传感科技有限公司 | Silicon piezoresistive pressure sensor calibration compensation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |