CN210221276U - Electronic scale with high reliability - Google Patents
Electronic scale with high reliability Download PDFInfo
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- CN210221276U CN210221276U CN201920822297.8U CN201920822297U CN210221276U CN 210221276 U CN210221276 U CN 210221276U CN 201920822297 U CN201920822297 U CN 201920822297U CN 210221276 U CN210221276 U CN 210221276U
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Abstract
The utility model discloses a strong reliability's electronic scale, including master control circuit, master control circuit's input is connected with response filter circuit and power supply circuit respectively, the master control circuit output is connected with display and voice prompt circuit respectively, possess weight locking suggestion, information display and electric quantity detection function weigh, keep apart the external interference of filtering when response filter circuit can respond to the collection and weigh, guarantee that the data of weighing that response filter circuit formed conveys to carry out the operation processing in the master control circuit accurately, make the measured data of electronic scale more accurate reliable, circuit structure is simple, low in production cost, the advantage that the interference killing feature is strong.
Description
Technical Field
The utility model relates to an electronic weighing equipment, especially an electronic scale of good reliability.
Background
The electronic scale is used as weighing equipment, the importance of accurate measurement is visible, but a general electronic scale is easily interfered by external electromagnetic interference, so that measured data can generate deviation, the accuracy rate is low, a manufacturer generally adds a protection module in a control circuit inside the electronic scale, the anti-interference capability of the whole circuit is improved, but the cost and the size of a circuit board of the whole set of product can be greatly increased, and the competitive advantage is difficult to obtain internationally.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a strong reliability electronic scale with simple circuit structure, low production cost and strong anti-interference capability.
The utility model provides a technical scheme that its technical problem adopted is:
the electronic scale with high reliability comprises a main control circuit, wherein the input end of the main control circuit is connected with an induction filter circuit and a power supply circuit respectively, and the output end of the main control circuit is connected with a display and a voice prompt circuit respectively.
The master control circuit comprises a master control chip U1, and the model of the master control chip U1 is CSU8RP 1185D.
The induction filter circuit comprises a sensor E +, a sensor E-, a sensor S +, a sensor S-, a capacitor C3, a capacitor C4, a capacitor C5 and a capacitor C6; a pin 1 of the sensor E + is connected with a pin 1 of the sensor S +; the 2 pins of the sensor E + are divided into two paths, one path is connected with the 6 pins of the main control chip U1, and the other path is grounded through the capacitor C3; the pin 3 of the sensor E + is connected with the pin 3 of the sensor S-; the pin 3 of the sensor S + is connected with the pin 3 of the sensor E-, the pin 2 is divided into three paths, one path is connected with the pin 8 of the main control chip U1, the second path is grounded through the capacitor C5, and the third path is grounded through the capacitor C4 and the capacitor C6 in sequence; a pin 2 of the sensor E-is grounded, and a pin 1 of the sensor E-is connected with a pin 1 of the sensor S-; and 2 pins of the sensor S-are divided into two paths, one path is connected with the node of the capacitor C4 and the capacitor C6, and the other path is connected with 9 pins of the main control chip U1.
The input end of the main control circuit is connected with a low-voltage detection circuit, the low-voltage detection circuit comprises a resistor R2 and a resistor R3, one end of the resistor R2 is connected with 5V voltage, the other end of the resistor R2 is divided into two paths, one path is grounded through the resistor R3, and the other path is connected with a 12 pin of the main control chip U1.
The display is an LCD display screen.
The utility model has the advantages that: the utility model discloses possess weight locking suggestion, information display and electric quantity detection function of weighing, isolation filtering external disturbance when response filter circuit can respond to the collection and weigh, guarantee that the data of weighing that response filter circuit formed conveys to the main control circuit in accurately and carry out the operation processing for the measured data of electronic scale is more accurate reliable, has the advantage that circuit structure is simple, low in production cost, interference killing feature are strong.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic block diagram of the circuit of the present invention;
fig. 2 is a first part of a circuit schematic of the present invention;
fig. 3 is a second part of the circuit schematic of the present invention;
fig. 4 is a third part of the circuit schematic of the present invention.
Detailed Description
Referring to fig. 1, an electronic scale with high reliability includes a main control circuit, an input end of the main control circuit is connected with an induction filter circuit and a power circuit, respectively, and an output end of the main control circuit is connected with a display and a voice prompt circuit, respectively (fig. 2 to fig. 4 together are a complete circuit schematic diagram of the embodiment, for the convenience of observation, the complete circuit diagram is divided into three parts of fig. 2 to fig. 4, and terminals with the same reference number in the diagram represent electrical connection).
Referring to fig. 2, the main control circuit includes a main control chip U1, the main control chip U1 is CSU8RP1185D, pins 2 and 3 of the main control chip U1 are respectively connected in series with a filter capacitor C1 and a filter capacitor C2, the filter capacitor C1 and the filter capacitor C2 are mainly used for filtering an alternating current component of an input power supply, and improving the anti-interference capability of the main control chip U1, a reset key UNIT is provided at pin 16 of the main control chip U1, and a weighing indicator lamp is connected in series at pin 18 of the main control chip U1 and is mainly used for work prompt of an electronic scale.
The power supply circuit comprises a conversion chip U2, a battery BAT, a capacitor C9, a capacitor C8 and a capacitor C7, wherein the battery BAT, the capacitor C9 and the capacitor C7 are connected in parallel, one section of the capacitor C is grounded, and the other end of the capacitor C is connected with a pin 2 of the conversion chip U2; the pin 1 of the conversion chip U2 is grounded, and the pin 3 is grounded through the capacitor C8; the node of the battery BAT and the 2 pins of the conversion chip U2 provides 5V working voltage for the electronic scale, and the node of the capacitor C8 and the 3 pins of the conversion chip U2 provides 3V working voltage for the electronic scale.
Referring to fig. 3, the inductive filter circuit includes a sensor E +, a sensor E-, a sensor S +, a sensor S-, a capacitor C3, a capacitor C4, a capacitor C5, and a capacitor C6; a pin 1 of the sensor E + is connected with a pin 1 of the sensor S +; the 2 pins of the sensor E + are divided into two paths, one path is connected with the 6 pins of the main control chip U1, and the other path is grounded through the capacitor C3; the pin 3 of the sensor E + is connected with the pin 3 of the sensor S-; the pin 3 of the sensor S + is connected with the pin 3 of the sensor E-, the pin 2 is divided into three paths, one path is connected with the pin 8 of the main control chip U1, the second path is grounded through the capacitor C5, and the third path is grounded through the capacitor C4 and the capacitor C6 in sequence; a pin 2 of the sensor E-is grounded, and a pin 1 of the sensor E-is connected with a pin 1 of the sensor S-; the 2 pins of the sensor S-are divided into two paths, one path is connected with the node of the capacitor C4 and the capacitor C6, the other path is connected with the 9 pins of the main control chip U1, when the sensor of the sensing filter circuit is stressed, the sensor deformation physical quantity is converted into an electric signal and transmitted to the main control chip U1, the capacitor C3, the capacitor C4, the capacitor C5 and the capacitor C6 are filter capacitors of a sensor data acquisition circuit, interference is filtered, weighing data formed by the sensing filter circuit are guaranteed to be accurately transmitted to the main control circuit for operation processing, and therefore the measuring data of the electronic scale are more accurate and reliable.
The input end of the main control circuit is connected with a low-voltage detection circuit, the low-voltage detection circuit comprises a resistor R2 and a resistor R3, one end of the resistor R2 is connected with 5V voltage, the other end of the resistor R2 is divided into two paths, one path of the resistor R3 is grounded, the other path of the resistor R3 is connected with a 12 pin of the main control chip U1, the resistor R2 and the resistor R3 are connected in series for voltage division, a node between the two is a power supply voltage detection point, and when the electric quantity of the battery is insufficient, the main control chip U1 automatically displays a prompt in a.
Referring to fig. 4, the display is an LCD display screen, and the main control chip U1 displays weighing information in the form of numbers on the display after receiving the electric signal. The voice prompt circuit comprises a MOS tube Q1, a loudspeaker BUZ, a resistor R8 and a resistor R9; the C pole of the MOS tube Q1 is connected with 5V voltage through the loudspeaker BUZ and the resistor R8 in sequence, the B pole is connected with the 20 pins of the main control chip U1 through the resistor R9, and the E pole is grounded; the voice prompt circuit is mainly used for weight locking prompt, the resistor R8 is a current-limiting resistor, and the resistor R9 is a driving resistor.
The above embodiments do not limit the scope of the present invention, and those skilled in the art can make equivalent modifications and variations without departing from the overall concept of the present invention.
Claims (4)
1. An electronic scale with strong reliability comprises a main control circuit, and is characterized in that the input end of the main control circuit is respectively connected with an induction filter circuit and a power supply circuit, and the output end of the main control circuit is respectively connected with a display and a voice prompt circuit; the master control circuit comprises a master control chip U1, and the model of the master control chip U1 is CSU8RP 1185D; the induction filter circuit comprises a sensor E +, a sensor E-, a sensor S +, a sensor S-, a capacitor C3, a capacitor C4, a capacitor C5 and a capacitor C6; a pin 1 of the sensor E + is connected with a pin 1 of the sensor S +; the 2 pins of the sensor E + are divided into two paths, one path is connected with the 6 pins of the main control chip U1, and the other path is grounded through the capacitor C3; the pin 3 of the sensor E + is connected with the pin 3 of the sensor S-; the pin 3 of the sensor S + is connected with the pin 3 of the sensor E-, the pin 2 is divided into three paths, one path is connected with the pin 8 of the main control chip U1, the second path is grounded through the capacitor C5, and the third path is grounded through the capacitor C4 and the capacitor C6 in sequence; a pin 2 of the sensor E-is grounded, and a pin 1 of the sensor E-is connected with a pin 1 of the sensor S-; and 2 pins of the sensor S-are divided into two paths, one path is connected with the node of the capacitor C4 and the capacitor C6, and the other path is connected with 9 pins of the main control chip U1.
2. The electronic scale of claim 1, wherein the input terminal of the main control circuit is connected to a low voltage detection circuit, the low voltage detection circuit comprises a resistor R2 and a resistor R3, one terminal of the resistor R2 is connected to a voltage of 5V, the other terminal is divided into two paths, one path is connected to ground through the resistor R3, and the other path is connected to the 12 pins of the main control chip U1.
3. The electronic scale of claim 1, wherein pins 2 and 3 of the main control chip U1 are respectively connected in series with a filter capacitor C1 and a filter capacitor C2, a reset button UNIT is provided at pin 16 of the main control chip U1, and a weight indicator lamp is connected in series at pin 18 of the main control chip U1.
4. The robust electronic scale of claim 1, wherein said display is an LCD display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920822297.8U CN210221276U (en) | 2019-05-30 | 2019-05-30 | Electronic scale with high reliability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920822297.8U CN210221276U (en) | 2019-05-30 | 2019-05-30 | Electronic scale with high reliability |
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| CN210221276U true CN210221276U (en) | 2020-03-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111964768A (en) * | 2020-08-05 | 2020-11-20 | 青岛英泰软件技术有限公司 | Filtering method for increasing anti-interference effect of electronic scale |
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- 2019-05-30 CN CN201920822297.8U patent/CN210221276U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111964768A (en) * | 2020-08-05 | 2020-11-20 | 青岛英泰软件技术有限公司 | Filtering method for increasing anti-interference effect of electronic scale |
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