CN202008396U - Anti-cheating electronic pricing table weigher - Google Patents
Anti-cheating electronic pricing table weigher Download PDFInfo
- Publication number
- CN202008396U CN202008396U CN2011200079176U CN201120007917U CN202008396U CN 202008396 U CN202008396 U CN 202008396U CN 2011200079176 U CN2011200079176 U CN 2011200079176U CN 201120007917 U CN201120007917 U CN 201120007917U CN 202008396 U CN202008396 U CN 202008396U
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- sensor
- circuit
- weigher
- cheating
- mcu
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Abstract
The utility model provides an anti-cheating electronic pricing table weigher which relates to an electronic weigher. The anti-cheating electronic pricing table weigher is provided with a charging circuit connected with a 220V AC power supply, an accumulator battery, a sensor, a mother board provided with an A/D conversion circuit and a MCU (microprogrammed control unit), a key input circuit and a display circuit. One end of the main body of the sensor is lengthened, and an accommodating hole is arranged on the lengthened part. A voltage stabilizing circuit and the mother board are encapsulated in the accommodating hole of the main body of the sensor by solidified colloid to form a sensor module, and the voltage stabilizing circuit in the sensor module and the mother board are correspondingly connected with the accumulator battery, the key input circuit and the display circuit through pins which are led outward. The anti-cheating electronic pricing table weigher can prevent law breakers from from changing analog quantity weighing signals and cheating through changing voltage supplied to the sensor or changing parameters and even connecting relationship of elements on the mother board.
Description
Technical field
The utility model relates to a kind of electronic scales.
Background technology
The circuit box structure of existing electronic price computing table scale, as shown in Figure 1: workplace one end of the body 1 of sensor 4 is provided with screw fixed orifice 411, with distortion 412 corresponding positions, hole resistance strain gage 42 is set on this workplace.The lead-in wire 43 of resistance strain gage 42 passes the inside of body 81 and outwards draws from the other end.Also be provided with the screw fixed orifice with the workplace facing surfaces on the body 1.The charging circuit 1 that is connected with the 220V AC power is to accumulator 2 power supplies, and accumulator 2 is to mu balanced circuit 3 power supplies.Mu balanced circuit 3 is to sensor 4, the motherboard 5 that has A/D change-over circuit and MCU and display circuit 7 power supplies.The analog quantity weighing-up wave of resistance strain gage 42 output of sensor 4 is transformed to the weighing-up wave of digital quantity through the A/D of motherboard 5 change-over circuit, and the weighing-up wave of this digital quantity is sent into the input port of MCU.Send into another input port of MCU of motherboard 5 by the unit price signal of the digital quantity of button inputting circuits 6 output, the output port of the MCU of motherboard 5 is given display circuit 7 with unit price data, the data of weighing and valuation data and is shown.
But existing electronic price computing table scale has following shortcoming: some lawless person can supply with the voltage of sensor by change, or changes the parameter even the annexation of components and parts on the motherboard 5, reaches the purpose that changes analog quantity weighing-up wave, cheating.
The utility model content
The utility model aims to provide a kind of lawless person of preventing and changes the voltage of supplying with sensor, or changes the parameter of components and parts on the motherboard even the anti-cheating electronic price computing table scale of annexation.
The technical solution of the utility model is: anti-cheating electronic price computing table scale, have the charging circuit, accumulator, mu balanced circuit, sensor, the motherboard that has A/D change-over circuit and MCU, button inputting circuits and the display circuit that are connected with the 220V AC power, an end of the body of this sensor extends and establishes containing hole at this lengthening part; The motherboard that this mu balanced circuit and this have A/D change-over circuit and a MCU is encapsulated in by the colloid that solidifies in this containing hole of this sensor body forms sensor assembly, this mu balanced circuit in this sensor assembly and this motherboard that has A/D change-over circuit and MCU corresponding this accumulator, this button inputting circuits and this display circuit of being connected of pin by outwards drawing.
The anti-cheating of the utility model electronic price computing table scale, establish containing hole with the end lengthening of the body of sensor and at this lengthening part, this mu balanced circuit and the motherboard that has A/D change-over circuit and a MCU are encapsulated in by the colloid that solidifies in this containing hole of this sensor body and form sensor assembly.The lawless person can not be changed supply with the voltage of sensor, or change the parameter even the annexation of components and parts on the motherboard, otherwise the motherboard that has A/D change-over circuit and a MCU will fall with the lengthening part of colloid that solidifies even sensor body is destroyed.This sensor assembly is convenient to be installed on the existing electronic price computing table scale, thereby old electronic price computing table scale can be transform as the anti-cheating of the utility model electronic price computing table scale.
Description of drawings
Fig. 1 is the electrical block diagram of existing electronic price computing table scale.
Fig. 2 is the electrical block diagram of the anti-cheating of the utility model electronic price computing table scale embodiment.
Fig. 3 is the deployed configuration synoptic diagram of sensor assembly among Fig. 1 embodiment.
Embodiment
One, embodiment one
The circuit structure of the anti-cheating of the utility model electronic price computing table scale embodiment, as shown in Figure 2. the charging circuit 1 that is connected with the 220V AC power is to accumulator 2 power supplies, and the mu balanced circuit of the pin 84 of outwards drawing on the sensor body 81 of accumulator 2 by sensor assembly 8 in the sensor body 81 of sensor assembly 8 powered.This mu balanced circuit on the sensor body 81 of sensor assembly 8 resistance strain gage 82 and the sensor body 81 of sensor assembly 8 in have the motherboard power supply of A/D change-over circuit and MCU, the pin 84 of outwards drawing on the sensor body 81 of this mu balanced circuit by sensor assembly 8 is to display circuit 7 power supplies.Have the pin 84 corresponding button inputting circuits 6 and the display circuits 7 of being connected of outwards drawing on the sensor body 81 of motherboard of A/D change-over circuit and MCU in the sensor body 81 of sensor assembly 8 by sensor assembly 8.
The A/D change-over circuit of analog quantity weighing-up wave motherboard in the sensor body 81 of sensor assembly 8 of resistance strain gage 82 outputs on the sensor assembly 8 is transformed to the weighing-up wave of digital quantity, and the weighing-up wave of this digital quantity is sent into the input port of MCU.The pin 84 of outwards drawing on the sensor body 81 of unit price signal by sensor assembly 8 by the digital quantity of button inputting circuits 6 output is sent into another input port of MCU of motherboards in the sensor body 81 of sensor assembly 8, and the output port of the MCU of motherboard is given display circuit 7 with the pin 84 of outwards drawing on unit price data, the data of weighing and the sensor body 81 of valuation data by sensor assembly 8 and shown.
The structure of sensor assembly 8, please referring to Fig. 3: sensor body 81 is provided with screw fixed orifice 811 as the sensor of existing electronic price computing table scale at workplace one end, with distortion 812 corresponding positions, hole resistance strain gage 82 is set on this workplace.The sensor lengthening of the existing electronic price computing table scale of the other end of sensor body 81 also is provided with the containing hole 813 parallel with being out of shape hole 812 at this lengthening part; The fuse of being made up of mu balanced circuit and this motherboard that has A/D change-over circuit and MCU 83 is inserted in the containing hole 813 of sensor body 81, and the lead-in wire of resistance strain gage 82 passes mu balanced circuit and this corresponding connection of motherboard that has A/D change-over circuit and MCU on sensor body 81 and the fuse 83 internally.Fuse 83 by silica gel or synthetic resin isocolloid cure package in the containing hole 813 of sensor body 81.The pin 84 of outwards drawing on the fuse 83 of sensor body 81 inside stretches out the containing hole 813 of sensor body 81.Also be provided with screw fixed orifice 814 with the workplace facing surfaces on the sensor body 81, sensor assembly 8 can be installed on the existing electronic price computing table scale easily as the sensor of existing electronic price computing table scale.
The above only is the utility model preferred embodiment, does not limit the scope that the utility model is implemented with this, and the equivalence of doing according to the technical solution of the utility model and description changes and modification, all should belong to the scope that the utility model is contained.
Claims (1)
1. anti-cheating electronic price computing table scale, have the charging circuit, accumulator, mu balanced circuit, sensor, the motherboard that has A/D change-over circuit and MCU, button inputting circuits and the display circuit that are connected with the 220V AC power, it is characterized in that: an end of the body of this sensor extends and establishes containing hole at this lengthening part; The motherboard that this mu balanced circuit and this have A/D change-over circuit and a MCU is encapsulated in by the colloid that solidifies in this containing hole of this sensor body forms sensor assembly, this mu balanced circuit in this sensor assembly and this motherboard that has A/D change-over circuit and MCU corresponding this accumulator, this button inputting circuits and this display circuit of being connected of pin by outwards drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200079176U CN202008396U (en) | 2011-01-11 | 2011-01-11 | Anti-cheating electronic pricing table weigher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200079176U CN202008396U (en) | 2011-01-11 | 2011-01-11 | Anti-cheating electronic pricing table weigher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202008396U true CN202008396U (en) | 2011-10-12 |
Family
ID=44750056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200079176U Expired - Lifetime CN202008396U (en) | 2011-01-11 | 2011-01-11 | Anti-cheating electronic pricing table weigher |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202008396U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102169007A (en) * | 2010-12-27 | 2011-08-31 | 苏州苏灵仪表有限公司 | A digital sensing electronic price computing scale |
-
2011
- 2011-01-11 CN CN2011200079176U patent/CN202008396U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102169007A (en) * | 2010-12-27 | 2011-08-31 | 苏州苏灵仪表有限公司 | A digital sensing electronic price computing scale |
| CN102169007B (en) * | 2010-12-27 | 2013-04-24 | 苏州苏灵仪表有限公司 | A digital sensing electronic price computing scale |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111012 |