CN2234609Y - Hand digital display electronic weighing device - Google Patents
Hand digital display electronic weighing device Download PDFInfo
- Publication number
- CN2234609Y CN2234609Y CN 95221202 CN95221202U CN2234609Y CN 2234609 Y CN2234609 Y CN 2234609Y CN 95221202 CN95221202 CN 95221202 CN 95221202 U CN95221202 U CN 95221202U CN 2234609 Y CN2234609 Y CN 2234609Y
- Authority
- CN
- China
- Prior art keywords
- voltage
- sensor
- digital display
- resistance
- potential drop
- 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 Current Or Voltage (AREA)
Abstract
The utility model relates to a hand digital display electronic weighing device including a weighing hook, a looped link, an outer housing and a weighing sensor. The hand digital display electronic weighing device is characterized in that the weighing sensor whose center of gravity is in the middle is an M mode; the surface of the weighing sensor is stuck with an electric resistance strain gauge. The electric appliance portion is composed of a power supply portion (A), a reference power supply with high accuracy portion (C), a digital display voltmeter portion (B), a weighing sensor portion (D) and a dc voltage amplifier of chopped wave stable zero with high accuracy portion (E). The hand digital display electronic weighing device has the characteristics of accurate weighing, small volume, light weight, low cost, simple circuit, high reliability, etc.
Description
The utility model relates to measuring apparatus, and specifically portable numeral shows electronic scales.
Existing electronic scales mainly contains desk-top electronic price computing scale, portable electronic price computing scale two big classes.Desk-top electronic price computing scale volume is bigger, can only horizontal positioned use, and carries inconvenience, needs AC-powered, and service condition is restricted, the price height.Portable electronic price computing scale circuit complexity, maintenance difficult.
The purpose of this utility model is to provide a kind of volume little, in light weight, and circuit is simple, and the portable numeral that reliability is high shows electronic scales.
The technical solution of the utility model is: comprise the hook (3) of weighing, and link (5), shell (1), LOAD CELLS (10) is characterized in that:
1., framework (12) is arranged in the shell of structure division, LOAD CELLS be center of gravity in the M of centre type, post resistance strain gage on its surface, sensor is fixed on the framework, hook is fixed on the sensor, circuit board A, B and battery case all are located in the framework;
2., electrical appliance part is by power unit (A), high precision reference power unit (C), numeral display voltage matrix section (B), LOAD CELLS part (D), high precision chopper-zero-stabilized DC voltage amplifier part (E) is formed, the voltage of sensor G1 output is through resistance R 9, R10 sends into direct current amplifier IC2 and carries out voltage amplification, DC voltage is sent into R21, C9, P2, R11, P3, the voltage divider dividing potential drop that R17 forms, send into IC1 by the P2 calibration again, M1 offers stabilivolt Z2 and transducer excitation voltage, Z2 provides voltage through divider resistance R17, P3, the R18 dividing potential drop exports P2 to by P3, and another road voltage of M1 is through R13, after the R14 dividing potential drop, enter IC2 by R12 and amplify, the voltage after the amplification is through R
21, send into digital voltmeter special IC IC1 after the P2 dividing potential drop, 37 pin of resistance R 4, R5, R6, capacitor C 6, Q1 and IC1 are formed the cell voltage test circuit.
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is a schematic appearance of the present utility model
Fig. 2 is a structural representation of the present utility model
Fig. 3 is circuit theory diagrams of the present utility model
Fig. 4 is sensor construction figure of the present utility model
Among the figure, the 1-housing, the 2-display screen, the 3-hook, the 4-switch, the 5-link, the 6-suspender belt, 7-circuit board A, the 8-battery case, 9-props up piece, 10-LOAD CELLS, 10-circuit board B, 12-framework, 13-hanger, 14-coupling shaft, 10-1-resistance strain gage, 10-2-metal unisexuality body.
As shown in the figure, the utility model partly is made up of structure part and electrical equipment, and structure partly comprises hook 3, link 5, shell 1, LOAD CELLS 10 has framework 12 in the shell, LOAD CELLS is fixed on the framework, and hook is fixed on the sensor, and circuit board A, B and battery case 8 all are located in the framework.
Electrical appliance part is by power unit A (in the frame of broken lines), high precision reference power unit C, digital display voltage matrix section B, LOAD CELLS part D, high precision chopper-zero-stabilized DC voltage amplifier part E composition.Sensor combines with 4 sheet resistance foil gauges after being processed into M shape by the metallic elastic body, and foil gauge is affixed on the surface of metallic elastic body.When action of gravity during in sensor, voltage about 1mv/v of G1 output is sent into difference direct current amplifier IC2 through resistance R 9, R10 and is carried out the amplification of high precision chopper-zero-stabilized DC voltage, the voltage divider that DC voltage after the amplification is sent into R21 and P2 composition carries out accurate dividing potential drop, send into IC1 by the P2 calibration again and carry out digital-to-analog conversion, decoding, counting, drive the display screen display result.Provide stable 5 volts of voltages to high precision stabilivolt Z1 and sensor G by M1
1Driving voltage.High precision stabilivolt Z1 provides 2.5 volts of reference voltages through divider resistance R17, P3, R18 dividing potential drop, exports P2 to by P3 and carries out the purpose that the equipotential balance reaches zeroing.Another road voltage of M1 is after R13, R14 dividing potential drop, become 1.2 volts, entering IC2 by R12 amplifies, simulate signal voltage after the amplification and send into digital voltmeter special IC IC1 (ICL7106 is connected into 2 volts of standard voltmeters) carry out digital-to-analog conversion, decoding, counting after the accurate dividing potential drop of R21, P2, driving display demonstrates and is claimed weight of heavy.37 pin of resistance R 4, R5, R6, capacitor C 6, Q1 and IC1 are formed the cell voltage test circuit, and whether the monitoring cell voltage is sufficient.
The utility model had both kept traditional custom with scale, and meter is accurately heavy again, and error only is a per mille, and volume is little, and in light weight, cost is low; Adopt powered battery, and be not subjected to the restriction in power supply and place; Circuit is simple, the reliability height; Waterproof, non-maintaining.
Claims (3)
1, a kind of portable numeral shows electronic scales, comprises the hook (3) of weighing, link (5), and shell (1), LOAD CELLS (10) is characterized in that:
1., framework (12) is arranged in the shell of structure division, LOAD CELLS be center of gravity in the M of centre type, post resistance strain gage on its surface, sensor is fixed on the framework, hook is fixed on the sensor, circuit board A, B and battery case all are located in the framework;
2., electrical appliance part is by power unit (A), high precision reference power unit (C), numeral display voltage matrix section (B), LOAD CELLS part (D), high precision chopper-zero-stabilized DC voltage amplifier part (E) is formed, the voltage of sensor G1 output is through resistance R 9, R10 sends into direct current amplifier IC2 and carries out voltage amplification, DC voltage is sent into R21, C9, P2, R11, P3, the voltage divider dividing potential drop that R17 forms, send into IC1 by the P2 calibration again, M1 offers stabilivolt Z2 and transducer excitation voltage, Z2 provides voltage through divider resistance R19, P3, the R18 dividing potential drop, export P2 to by P3, another road voltage of M1 is through R13, after the R14 dividing potential drop, enter IC2 by R12 and amplify, the voltage after the amplification is through R21, send into digital voltmeter special IC IC1 after the P2 dividing potential drop, resistance R 4, R5, R6, capacitor C 6,37 pin of Q1 and IC1 are formed the cell voltage test circuit.
2, electronic scales according to claim 1 is characterized in that sensor is organized a performance by M type metallic elastic body and four sheet resistance foil gauges to form.
3, electronic scales according to claim 1 is characterized in that integrated circuit (IC) 1 is connected into 2 volts of standard voltmeters by ICL7106.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95221202 CN2234609Y (en) | 1995-08-24 | 1995-08-24 | Hand digital display electronic weighing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95221202 CN2234609Y (en) | 1995-08-24 | 1995-08-24 | Hand digital display electronic weighing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2234609Y true CN2234609Y (en) | 1996-09-04 |
Family
ID=33868884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95221202 Expired - Fee Related CN2234609Y (en) | 1995-08-24 | 1995-08-24 | Hand digital display electronic weighing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2234609Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104145176A (en) * | 2012-03-26 | 2014-11-12 | 基斯特勒控股公司 | Electronic circuit for a weight-in-motion sensor |
-
1995
- 1995-08-24 CN CN 95221202 patent/CN2234609Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104145176A (en) * | 2012-03-26 | 2014-11-12 | 基斯特勒控股公司 | Electronic circuit for a weight-in-motion sensor |
| CN104145176B (en) * | 2012-03-26 | 2016-06-29 | 基斯特勒控股公司 | electronic circuit for dynamic weighing sensor |
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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 |