CN211504343U - Low-power consumption sensor circuit and electronic scale - Google Patents
Low-power consumption sensor circuit and electronic scale Download PDFInfo
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- CN211504343U CN211504343U CN202020452748.6U CN202020452748U CN211504343U CN 211504343 U CN211504343 U CN 211504343U CN 202020452748 U CN202020452748 U CN 202020452748U CN 211504343 U CN211504343 U CN 211504343U
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- 238000001514 detection method Methods 0.000 claims abstract description 80
- 238000006243 chemical reaction Methods 0.000 claims description 32
- 238000005259 measurement Methods 0.000 description 9
- 238000005303 weighing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model discloses a low-power consumption sensor circuit and electronic scale, pressure detection circuit convert pressure into the signal of telecommunication, and control circuit basis the pressure value is confirmed to the signal of telecommunication, when the pressure value that detects is first preset pressure value, exports first control signal to when the pressure value that detects is second preset pressure value, exports second control signal. The first voltage division circuit is used for reducing the current value of the pressure detection circuit, and the first switch circuit is conducted when receiving the first control signal so as to short-circuit the first voltage division circuit. The second voltage division circuit reduces the current value of the pressure detection circuit, and the second switch circuit is conducted when receiving the second control signal to short-circuit the second voltage division circuit. The utility model discloses technical scheme is used for solving the electronic scale and uses the great problem of consumption.
Description
Technical Field
The utility model relates to a pressure measurement technical field, in particular to low-power consumption sensor circuit and electronic scale.
Background
At present, various electronic scales are widely used in the market, the principle of the electronic scales is as follows, a resistance type strain gauge pressure sensor is generally adopted by the electronic scales, a pressure signal is converted into an electric signal, the electric signal is converted into a digital signal through analog-to-digital conversion, and then the digital signal is processed into weight data through a single chip microcomputer.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a low-power consumption sensor circuit aims at solving current electronic scale and uses the great problem of consumption.
In order to achieve the above object, the utility model provides a low-power consumption sensor circuit, low-power consumption sensor circuit includes:
a pressure detection circuit for converting pressure into an electrical signal;
the control circuit is used for determining a pressure value according to the electric signal and outputting a first control signal when the detected pressure value is a first preset pressure value; outputting a second control signal when the detected pressure value is a second preset pressure value;
a first voltage dividing circuit connected in series with the pressure detection circuit and configured to reduce a current value of the pressure detection circuit;
a first switch circuit connected in parallel with the first voltage dividing circuit and turned on to short-circuit the first voltage dividing circuit when receiving the second control signal;
a second voltage dividing circuit connected in series with the pressure detection circuit and configured to reduce a current value of the pressure detection circuit;
and the second switch circuit is connected with the second voltage division circuit in parallel and is conducted to short-circuit the second voltage division circuit when receiving the second control signal.
Optionally, the control circuit includes a power output terminal, a positive reference voltage terminal, a negative reference voltage terminal, a positive sensor detection terminal, a negative sensor detection terminal, and a ground terminal, the power output terminal of the control circuit and the first terminal of the first voltage divider circuit are respectively connected to the first terminal of the first switch circuit, the positive reference voltage terminal of the control circuit, the second terminal of the first voltage divider circuit, and the input terminal of the pressure detection circuit are respectively connected to the second terminal of the first switch circuit, the negative reference voltage terminal of the control circuit, the first terminal of the second voltage divider circuit, and the output terminal of the pressure detection circuit are respectively connected to the first terminal of the second switch circuit, the positive sensor detection terminal of the control circuit is connected to the positive differential signal output terminal of the pressure detection circuit, and the negative sensor detection terminal of the control circuit is connected to the negative differential signal output terminal of the pressure detection circuit, and the ground terminal of the control circuit and the second terminal of the second voltage division circuit are respectively connected with the second terminal of the second switch circuit.
Optionally, the pressure detection circuit comprises:
the pressure detection circuit comprises a first resistance-type strain gauge, a second resistance-type strain gauge, a third resistance-type strain gauge and a fourth resistance-type strain gauge, wherein the first end of the first resistance-type strain gauge is connected with the first end of the second resistance-type strain gauge, the connection node of the first resistance-type strain gauge is the input end of the pressure detection circuit, the second end of the first resistance-type strain gauge is connected with the first end of the third resistance-type strain gauge, and the connection node of the first resistance-type strain gauge is the negative differential signal output end of the pressure detection circuit; the second end of the second resistance-type strain gauge is connected with the first end of the fourth resistance-type strain gauge, and the connection node of the second resistance-type strain gauge and the first end of the fourth resistance-type strain gauge is a forward differential signal output end of the pressure detection circuit; and the second end of the third resistance-type strain gauge is connected with the second end of the fourth resistance-type strain gauge, and the connection node of the third resistance-type strain gauge and the fourth resistance-type strain gauge is the output end of the pressure detection circuit.
Optionally, the first voltage dividing circuit includes a first resistor, a first end of the first resistor is a first end of the first voltage dividing circuit, and a second end of the first resistor is a second end of the first voltage dividing circuit.
Optionally, the second voltage-dividing circuit includes a second resistor, a first end of the second resistor is a first end of the second voltage-dividing circuit, and a second end of the second resistor is a second end of the second voltage-dividing circuit.
Optionally, the first switch circuit includes a first switch, a first end of the first switch is a first end of the first switch circuit, and a second end of the first switch is a second end of the first switch circuit.
Optionally, the second switch circuit includes a second switch, a first end of the second switch is a first end of the second switch circuit, and a second end of the second switch is a second end of the second switch circuit.
Optionally, the control circuit includes an analog-to-digital conversion module and a control module, a power output end of the analog-to-digital conversion module is a power output end of the control circuit, a positive reference voltage end of the analog-to-digital conversion module is a positive reference voltage end of the control circuit, a negative reference voltage end of the analog-to-digital conversion module is a negative reference voltage end of the control circuit, a positive sensor detection end of the analog-to-digital conversion module is a positive sensor detection end of the control circuit, a negative sensor detection end of the analog-to-digital conversion module is a negative sensor detection end of the control circuit, a ground end of the analog-to-digital conversion module is a ground end of the control circuit, and an input/output end of the analog-to-digital conversion module is connected with an input/output end of.
Optionally, the first switch circuit, the second switch circuit, and the analog-to-digital conversion module are integrated in a chip.
In order to achieve the above object, the present invention further provides an electronic scale, including the electronic scale as described above.
The utility model discloses technical scheme's low-power consumption sensor circuit includes pressure detection circuit, control circuit, first voltage divider circuit, first switch circuit, second voltage divider circuit and second switch circuit. The pressure detection circuit converts pressure into an electric signal, the control circuit determines a pressure value according to the electric signal, and outputs a first control signal when the detected pressure value is a first preset pressure value; and outputting a second control signal when the detected pressure value is a second preset pressure value. The first voltage dividing circuit may reduce a current value of the pressure detecting circuit, thereby reducing power consumption. And the first switch circuit is conducted when receiving the second control signal so as to short-circuit the first voltage division circuit, so that the voltage division function of the first voltage division circuit is closed, and the precision of the detected pressure value is improved. The second voltage division circuit is used for reducing the current value of the pressure detection circuit, thereby reducing power consumption. And the second switch circuit is conducted when receiving the second control signal so as to short-circuit the second voltage division circuit, so that the voltage division function of the second voltage division circuit is closed, and the precision of the detected pressure value is improved. In the above scheme, the first preset pressure value may indicate a condition that the standby pressure value is zero or a certain initial range value, at this time, the requirement for measurement accuracy is low, and the power consumption may be reduced by reducing the current value of the pressure detection circuit. The second preset pressure value can start to be measured, at the moment, the measurement precision is required to be higher, and the measurement precision is improved by increasing the current value of the pressure detection circuit. Therefore, the technical scheme of the utility model can also reduce whole consumption when guaranteeing measurement accuracy.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic circuit diagram of an embodiment of the low power consumption sensor circuit of the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a low-power consumption sensor circuit. The electronic scale is used for solving the problem that the power consumption of the existing electronic scale is large.
In an embodiment of the present invention, as shown in fig. 1, the low power consumption sensor circuit includes a pressure detection circuit 30, a control circuit 60, a first voltage division circuit 10, a first switch circuit 20, a second voltage division circuit 40, and a second switch circuit 50. The first voltage dividing circuit 10 is connected in series with the pressure detecting circuit 30, the first switching circuit 20 is connected in parallel with the first voltage dividing circuit 10, the second voltage dividing circuit 40 is connected in series with the pressure detecting circuit 30, and the second switching circuit 50 is connected in parallel with the second voltage dividing circuit 40.
The pressure detection circuit 30 converts the pressure into an electrical signal, the control circuit 60 determines a pressure value according to the electrical signal, and outputs a first control signal when the detected pressure value is a first preset pressure value; and outputting a second control signal when the detected pressure value is a second preset pressure value.
The first voltage dividing circuit 10 can reduce the current value of the pressure detecting circuit 30, thereby reducing power consumption. The first switch circuit 20 is turned on when receiving the second control signal to short-circuit the first voltage dividing circuit 10 to turn off the voltage dividing function thereof, thereby improving the accuracy of the detected pressure value. The second voltage dividing circuit 40 is used to reduce the current value of the pressure detecting circuit 30, thereby reducing power consumption. The second switching circuit 50 is turned on upon receiving the second control signal to short-circuit the second voltage dividing circuit 40 to turn off the voltage dividing function thereof, thereby improving the accuracy of the detected pressure value. In the above scheme, the first preset pressure value may indicate a condition that the standby pressure value is zero or is a certain initial range value, at this time, the requirement on the measurement accuracy is low, and the power consumption may be reduced by reducing the current value of the pressure detection circuit 30. The second preset pressure value may indicate that the measurement is started, in which case the measurement accuracy needs to be high, and in which case the current value of the pressure detection circuit 30 is increased to improve the measurement accuracy. Therefore, the technical scheme of the utility model can also reduce whole consumption when guaranteeing measurement accuracy.
In one embodiment, the control circuit 60 includes a power output terminal, a positive reference voltage terminal, a negative reference voltage terminal, a positive sensor detection terminal, a negative sensor detection terminal, and a ground terminal, the power output terminal of the control circuit 60 and the first terminal of the first voltage divider circuit 10 are respectively connected to the first terminal of the first switch circuit 20, the positive reference voltage terminal of the control circuit 60, the second terminal of the first voltage divider circuit 10, and the input terminal of the pressure detection circuit 30 are respectively connected to the second terminal of the first switch circuit 20, the negative reference voltage terminal of the control circuit 60, the first terminal of the second voltage divider circuit 40, and the output terminal of the pressure detection circuit 30 are respectively connected to the first terminal of the second switch circuit 50, the positive sensor detection terminal of the control circuit 60 is connected to the positive differential signal output terminal of the pressure detection circuit 30, the negative sensor detection terminal of the control circuit 60 is connected to the negative differential signal output terminal of the pressure detection circuit 30, the ground terminal of the control circuit 60 and the second terminal of the second voltage dividing circuit 40 are connected to the second terminal of the second switching circuit 50, respectively.
Optionally, the pressure detection circuit 30 includes a first resistive strain gauge Rs1, a second resistive strain gauge Rs2, a third resistive strain gauge Rs3, and a fourth resistive strain gauge Rs4, a first end of the first resistive strain gauge Rs1 is connected to a first end of the second resistive strain gauge Rs2, a connection node of the first resistive strain gauge Rs1 is an input end of the pressure detection circuit 30, a second end of the first resistive strain gauge Rs1 is connected to a first end of the third resistive strain gauge Rs3, and a connection node of the first resistive strain gauge Rs1 is a negative differential signal output end of the pressure detection circuit 30; the second end of the second resistive strain gauge Rs2 is connected to the first end of the fourth resistive strain gauge Rs4, and the connection node is the forward differential signal output end of the pressure detection circuit 30; the second end of the third resistive strain gauge Rs3 is connected to the second end of the fourth resistive strain gauge Rs4, and the connection node is the output end of the pressure detection circuit 30.
The pressure detection circuit 30 is composed of a first resistance-type strain gauge Rs1, a second resistance-type strain gauge Rs2, a third resistance-type strain gauge Rs3 and a fourth resistance-type strain gauge Rs4, namely, the pressure detection sensor can output positive and negative differential signals, and therefore detection accuracy can be improved.
Optionally, to simplify the circuit, the first voltage dividing circuit 10 includes a first resistor R1, a first terminal of the first resistor R1 is a first terminal of the first voltage dividing circuit 10, and a second terminal of the first resistor R1 is a second terminal of the first voltage dividing circuit 10.
Optionally, to simplify the circuit, the second voltage dividing circuit 40 includes a second resistor R2, a first terminal of the second resistor R2 is a first terminal of the second voltage dividing circuit 40, and a second terminal of the second resistor R2 is a second terminal of the second voltage dividing circuit 40.
Alternatively, to simplify the circuit, the first switch circuit 20 includes a first switch S1, the first terminal of the first switch S1 is the first terminal of the first switch circuit 20, and the second terminal of the first switch S1 is the second terminal of the first switch circuit 20.
Alternatively, to simplify the circuit, the second switch circuit 50 includes a second switch S2, the first terminal of the second switch S2 is the first terminal of the second switch circuit 50, and the second terminal of the second switch S2 is the second terminal of the second switch circuit 50.
Optionally, the control circuit 60 includes an analog-to-digital conversion module and a control module, a power output end of the analog-to-digital conversion module is a power output end of the control circuit 60, a positive reference voltage end of the analog-to-digital conversion module is a positive reference voltage end of the control circuit 60, a negative reference voltage end of the analog-to-digital conversion module is a negative reference voltage end of the control circuit 60, a positive sensor detection end of the analog-to-digital conversion module is a positive sensor detection end of the control circuit 60, a negative sensor detection end of the analog-to-digital conversion module is a negative sensor detection end of the control circuit 60, a ground end of the analog-to-digital conversion module is a ground end of the control circuit 60, and an input/output end of the analog-.
The analog-to-digital conversion module is used for converting the detected positive and negative differential signals into digital signals, and the control module can obtain actually measured pressure values according to the detected digital signals so as to obtain weighing values of the electronic scale.
Alternatively, in order to increase the selectable types of the chip, the first switch circuit 20, the second switch circuit 50 and the analog-to-digital conversion module are integrated in one chip.
Alternatively, the analog-to-digital conversion module and the control module may be implemented by separate chips, or by a chip integrating the functions of the analog-to-digital conversion module and the control module.
In one embodiment, the chip type of the analog-to-digital conversion module is SDI0829, and the chip type of the control module is SDI 5216.
In one embodiment, the model of the chip integrating the functions of the analog-to-digital conversion module and the control module is SDI 5229.
The principle of the present invention is explained below with reference to fig. 1:
when the electronic scale is in an idle zero position state, namely the detected pressure value is a first preset pressure value, the control module outputs a first control signal, and the first control signal isThe first switch S1 and the second switch S2 are turned off, the first resistor R1 and the second resistor R2 are activated, and the current flowing through the pressure detection circuit 30 (sensor) is: i is1VCOM/(R0+ R1+ R2). R0 is the resistance of the pressure detection circuit 30.
When the electronic scale exits an idle zero position state and is in a weighing state, namely the detected pressure value is a second preset pressure value, the control module outputs a second control signal, the first switch S1 and the second switch S2 are closed, at the moment, the resistors R1 and R2 are short-circuited by the switches and do not work, and the current flowing through the sensor is as follows: i is2VCOM/R0. At this time, the voltage VCOM is fully loaded on the sensor, maintaining high accuracy.
In the scheme, when the electronic scale is used, the time of the 'zero position' state which is usually idle is far longer than the time of the 'weighing state', so that the power consumption of the whole electronic scale is greatly reduced.
The application also provides an electronic scale which comprises the low-power consumption sensor circuit.
It is worth noting that, because this application electronic scale has contained foretell low-power consumption sensor circuit, consequently, the utility model discloses a merit electronic scale contains all embodiments and beneficial effect of above-mentioned low-power consumption sensor circuit, no longer gives details here.
The above is only the optional embodiment of the present invention, and not therefore the scope of the present invention is limited, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the application directly/indirectly in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A low power consumption sensor circuit, the low power consumption sensor circuit comprising:
a pressure detection circuit for converting pressure into an electrical signal;
the control circuit is used for determining a pressure value according to the electric signal and outputting a first control signal when the detected pressure value is a first preset pressure value; outputting a second control signal when the detected pressure value is a second preset pressure value;
a first voltage dividing circuit connected in series with the pressure detection circuit and configured to reduce a current value of the pressure detection circuit;
a first switch circuit connected in parallel with the first voltage dividing circuit and turned on to short-circuit the first voltage dividing circuit when receiving the second control signal;
a second voltage dividing circuit connected in series with the pressure detection circuit and configured to reduce a current value of the pressure detection circuit;
and the second switch circuit is connected with the second voltage division circuit in parallel and is conducted to short-circuit the second voltage division circuit when receiving the second control signal.
2. The low power consumption sensor circuit according to claim 1, wherein the control circuit comprises a power output terminal, a positive reference voltage terminal, a negative reference voltage terminal, a positive sensor detection terminal, a negative sensor detection terminal, and a ground terminal, the power output terminal of the control circuit and the first terminal of the first voltage divider circuit are respectively connected to the first terminal of the first switch circuit, the positive reference voltage terminal of the control circuit, the second terminal of the first voltage divider circuit, and the input terminal of the pressure detection circuit are respectively connected to the second terminal of the first switch circuit, the negative reference voltage terminal of the control circuit, the first terminal of the second voltage divider circuit, and the output terminal of the pressure detection circuit are respectively connected to the first terminal of the second switch circuit, and the positive sensor detection terminal of the control circuit is connected to the positive differential signal output terminal of the pressure detection circuit, the negative electrode detection end of the sensor of the control circuit is connected with the negative differential signal output end of the pressure detection circuit, and the grounding end of the control circuit and the second end of the second voltage division circuit are respectively connected with the second end of the second switch circuit.
3. The low power consumption sensor circuit of claim 2, wherein the pressure detection circuit comprises:
the pressure detection circuit comprises a first resistance-type strain gauge, a second resistance-type strain gauge, a third resistance-type strain gauge and a fourth resistance-type strain gauge, wherein the first end of the first resistance-type strain gauge is connected with the first end of the second resistance-type strain gauge, the connection node of the first resistance-type strain gauge is the input end of the pressure detection circuit, the second end of the first resistance-type strain gauge is connected with the first end of the third resistance-type strain gauge, and the connection node of the first resistance-type strain gauge is the negative differential signal output end of the pressure detection circuit; the second end of the second resistance-type strain gauge is connected with the first end of the fourth resistance-type strain gauge, and the connection node of the second resistance-type strain gauge and the first end of the fourth resistance-type strain gauge is a forward differential signal output end of the pressure detection circuit; and the second end of the third resistance-type strain gauge is connected with the second end of the fourth resistance-type strain gauge, and the connection node of the third resistance-type strain gauge and the fourth resistance-type strain gauge is the output end of the pressure detection circuit.
4. The low power consumption sensor circuit of claim 1, wherein the first voltage divider circuit comprises a first resistor, a first end of the first resistor being a first end of the first voltage divider circuit, and a second end of the first resistor being a second end of the first voltage divider circuit.
5. The low power consumption sensor circuit of claim 1, wherein the second voltage divider circuit comprises a second resistor, a first end of the second resistor being a first end of the second voltage divider circuit, and a second end of the second resistor being a second end of the second voltage divider circuit.
6. The low power consumption sensor circuit of claim 1, wherein the first switch circuit comprises a first switch, a first terminal of the first switch being a first terminal of the first switch circuit, a second terminal of the first switch being a second terminal of the first switch circuit.
7. The low power consumption sensor circuit of claim 1, wherein the second switch circuit comprises a second switch, a first terminal of the second switch being a first terminal of the second switch circuit, a second terminal of the second switch being a second terminal of the second switch circuit.
8. The low power consumption sensor circuit of claim 2, wherein the control circuit comprises an analog-to-digital conversion module and a control module, the power output end of the analog-to-digital conversion module is the power output end of the control circuit, the positive reference voltage end of the analog-to-digital conversion module is the positive reference voltage end of the control circuit, the negative reference voltage end of the analog-to-digital conversion module is the negative reference voltage end of the control circuit, the positive electrode detection end of the sensor of the analog-to-digital conversion module is the positive electrode detection end of the sensor of the control circuit, the detection end of the negative electrode of the sensor of the analog-to-digital conversion module is the detection end of the negative electrode of the sensor of the control circuit, the ground terminal of the analog-to-digital conversion module is the ground terminal of the control circuit, and the input and output ends of the analog-to-digital conversion module are connected with the input and output ends of the control module.
9. The low power consumption sensor circuit of any one of claims 1-8, wherein the first switching circuit, the second switching circuit, and the analog-to-digital conversion module are integrated in a chip.
10. An electronic scale, characterized in that it comprises an electronic scale according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020452748.6U CN211504343U (en) | 2020-03-31 | 2020-03-31 | Low-power consumption sensor circuit and electronic scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020452748.6U CN211504343U (en) | 2020-03-31 | 2020-03-31 | Low-power consumption sensor circuit and electronic scale |
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| Publication Number | Publication Date |
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| CN211504343U true CN211504343U (en) | 2020-09-15 |
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| CN202020452748.6U Active CN211504343U (en) | 2020-03-31 | 2020-03-31 | Low-power consumption sensor circuit and electronic scale |
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| CN (1) | CN211504343U (en) |
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Effective date of registration: 20240415 Address after: 410000 Room 201, building C12, Jinrong Wangcheng science and Technology Industrial Park, No. 858, Purui West Road, Wangcheng economic and Technological Development Zone, Changsha City, Hunan Province Patentee after: Hunan xinyide Technology Co.,Ltd. Country or region after: China Address before: 518000 a412, 4th floor, block a, Shenzhen famous industrial products exhibition and procurement center, Baoyuan Road, Xixiang street, Bao'an District, Shenzhen, Guangdong Patentee before: SHENZHEN SOLIDIC TECHNOLOGY CO.,LTD. Country or region before: China |
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