CN219265584U

CN219265584U - Automatic calibration device for sensor

Info

Publication number: CN219265584U
Application number: CN202320717239.5U
Authority: CN
Inventors: 吴浩
Original assignee: Shenzhen Xinjingcheng Sensor Technology Co ltd
Current assignee: Shenzhen Xinjingcheng Sensor Technology Co ltd
Priority date: 2023-04-04
Filing date: 2023-04-04
Publication date: 2023-06-27
Anticipated expiration: 2033-04-04

Abstract

The application relates to the technical field of sensor calibration, in particular to an automatic sensor calibration device which comprises a first port, a second port, a serial port unit, an acquisition unit and a processing unit; the first port is provided with a plurality of data transmission channels and is used for being connected with an external sensor to be calibrated; the second port is used for being connected with an external standard sensor, the number of the data transmission channels is the same as that of the standard data input channels, and the data transmission channels and the standard data input channels are in one-to-one correspondence; the serial port unit is connected with the first port, and the acquisition unit is used for acquiring and receiving the standard data received by the second port and acquiring parameters to be calibrated received by the serial port unit; the processing unit is used for calculating the difference value between the parameter to be calibrated and the standard parameter in the corresponding channel and transmitting the difference value to the serial port unit as the data compensation quantity. The present application has the effect of improving the efficiency of calibration of a plurality of sensors.

Description

Automatic calibration device for sensor

Technical Field

The application relates to the technical field of sensor calibration, in particular to an automatic sensor calibration device.

Background

Currently, pressure sensors are devices or apparatuses that sense a pressure signal and convert the pressure signal to a usable output electrical signal according to a certain rule. Pressure sensors are generally composed of a pressure sensitive element and a signal processing unit. Along with the rapid development of science and technology, the pressure sensor is widely applied to industries such as space carrying systems, manned space engineering systems, remote sensing measurement, environment monitoring, medical instruments, weaponry and the like, and the reliability of the pressure sensor directly influences the performance of a measuring device.

However, in the case of long-term measurement or excessive operation, there is a certain deviation in the sensitivity of the sensor, and there is a case where the measurement of the digital parameter is deviated from the actual data, and in order to ensure that the sensor can accurately transmit information, the sensor needs to be calibrated.

However, in the existing one-to-one sensor data calibration method, the data calibration process is complicated, and the data recording error is easy to occur due to improper operation, so that the result is incorrect. When a plurality of sensors need to be calibrated, different sensors need to be replaced one by one, and the sensors are calibrated sequentially, so that the calibration time is greatly wasted, and the situation needs to be improved.

Disclosure of Invention

In order to improve efficiency when a plurality of sensors are calibrated, the application provides an automatic sensor calibration device.

The application provides a sensor automatic calibration device adopts following technical scheme:

the automatic sensor calibration device comprises a first port, a second port, a first sensor and a second sensor, wherein a plurality of data transmission channels are arranged in the first port, and the first port is used for being connected with an external sensor to be calibrated; the second port is provided with a plurality of standard data input channels, the second port is used for being connected with an external standard sensor, the number of the data transmission channels is the same as that of the standard data input channels, and the data transmission channels and the standard data input channels are in one-to-one correspondence; the serial port unit is connected with the first port; the acquisition unit is respectively connected with the second port and the serial port unit and is used for acquiring and receiving standard data received by the second port and acquiring parameters to be calibrated received by the serial port unit; the processing unit is respectively connected with the acquisition unit and the serial port unit, and is used for calculating the difference value between the parameter to be calibrated and the standard parameter in the corresponding channel and transmitting the difference value to the serial port unit to serve as a data compensation quantity.

By adopting the technical scheme, when an external sensor to be calibrated is required to be calibrated, the external standard sensor is connected with the second port, the external standard sensor transmits standard data to the second port through the standard data input channel, then the external sensor to be calibrated is connected with the first port, the external sensor to be calibrated transmits parameters to the serial port unit through the corresponding data transmission channel, the acquisition unit acquires the standard data in the second port and the parameters to be calibrated received by the serial port unit, and the processing unit calculates the difference between the parameters to be calibrated and the standard parameters in the corresponding channel and transmits the difference to the serial port unit as data compensation quantity, and the serial port unit feeds back the difference to the external sensor to be calibrated for calibration; compared with the existing one-to-one sensor data calibration mode, the data calibration process is complex and complicated, the scheme in the application can realize one-to-many sensor data calibration mode, and can calibrate a plurality of different sensors simultaneously, so that the efficiency of calibrating the sensors is improved.

Optionally, the system further comprises a key unit, wherein the key unit is connected with the processing unit, and is used for setting various parameter information for the standard data input channels of the second port and triggering the switching of the corresponding channel number.

Through adopting above-mentioned technical scheme, can manually set up the various parameter information of standard data input channel through the button unit, adjust various parameter functions to and can switch corresponding passageway quantity according to the quantity of outside to wait to school sensor, can switch over 1 or N passageway and switch on, thereby make the device possess automatic calibration and manual calibration two kinds of modes, all can accomplish the accurate calibration to external to wait to school sensor sensitivity.

Optionally, the system further comprises a display unit, wherein the display unit is connected with the processing unit and is used for displaying the parameter information output by the processing unit.

By adopting the technical scheme, the parameter information output by the processing unit can be displayed through the display unit, so that an operator can more intuitively judge the parameter information, and the accuracy of calibration is improved.

Optionally, the system further comprises a storage unit, wherein the storage unit is connected with the processing unit and is used for storing the data compensation amount output by the processing unit.

By adopting the technical scheme, the data compensation quantity output by the processing unit can be automatically stored through the storage unit, and an operator is not required to manually record data.

Optionally, the system further comprises a communication unit, wherein the communication unit is connected with the processing unit and is used for transmitting the data compensation quantity calculated by the processing unit to an external device.

By adopting the technical scheme, the data compensation quantity calculated by the processing unit is transmitted to the external equipment through the communication unit, so that an operator can intuitively read the data compensation quantity output by the processing unit through the external equipment, and the operator can conveniently analyze the conditions of the external sensor to be calibrated.

Optionally, the processing chip of the processing unit is a Nuvoton chip;

by adopting the technical scheme, the processing chip adopted by the processing unit is a Nuvoton chip, and the device has the characteristics of high speed transmission output and high dynamic response frequency.

Optionally, the processing unit includes a crystal oscillator circuit, a reset circuit and a power supply circuit.

By adopting the technical scheme, the processing unit comprises a crystal oscillator circuit, a reset circuit, a power circuit and other core components for maintaining the system to operate.

In summary, the present application includes at least one of the following beneficial technical effects:

1. compared with the existing one-to-one sensor data calibration mode, the data calibration process is complicated, the one-to-many sensor data calibration mode can be realized, and a plurality of different sensors can be calibrated at the same time, so that the efficiency of calibrating the sensors is improved;

2. the device has two modes of automatic calibration and manual calibration, and can finish accurate calibration of the sensitivity of the external sensor to be calibrated;

3. the processing chip adopted by the processing unit is a Nuvoton chip, and has the characteristics of high speed transmission output and high dynamic response frequency;

drawings

FIG. 1 is a schematic flow chart of an automatic sensor calibration device according to an embodiment of the present application;

FIG. 2 is a schematic circuit diagram of an acquisition unit in an embodiment of the present application;

FIG. 3 is a schematic circuit diagram of a processing unit in an embodiment of the present application;

FIG. 4 is a schematic diagram of a status indicator light circuit of a display unit in an embodiment of the present application;

FIG. 5 is a schematic diagram of a data storage circuit of a memory cell in an embodiment of the present application;

fig. 6 is a schematic diagram of a parameter storage circuit of a memory cell in an embodiment of the present application.

Reference numerals illustrate:

1. a first port; 2. a second port; 3. a serial port unit; 4. an acquisition unit; 5. a processing unit; 6. a key unit; 7. a display unit; 8. a storage unit; 9. and a communication unit.

Detailed Description

Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.

"connected" in the present utility model encompasses both direct and indirect connections, such as those made through some active device, passive device, or electrically conductive medium; connections through other active or passive devices, such as through switches, follower circuits, etc. circuits or components, may be included as known to those skilled in the art, as may be provided for the same or similar functional purposes.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

The embodiment of the application discloses an automatic sensor calibration device. Referring to fig. 1, the portable electronic device includes a first port 1, a second port 2, a serial port unit 3, an acquisition unit 4, a processing unit 5, a key unit 6, a display unit 7, a storage unit 8, and a communication unit 9. The first port 1 is used for being connected with an external sensor to be calibrated, the second port 2 is used for being connected with an external standard sensor, the serial port unit 3 is connected with the first port 1, the acquisition unit 4 is respectively connected with the second port 2 and the serial port unit 3, the processing unit 5 is respectively connected with the acquisition unit 4 and the serial port unit 3, the key unit 6 is connected with the processing unit 5, the display unit 7 is connected with the processing unit 5, the storage unit 8 is connected with the processing unit 5, and the communication unit 9 is connected with the processing unit 5. The first port 1 is provided with a plurality of data transmission channels, the second port 2 is provided with a plurality of standard data input channels, the number of the data transmission channels is the same as that of the standard data input channels, and the data transmission channels and the standard data input channels are in one-to-one correspondence; the acquisition unit 4 is used for acquiring standard data received by the second port 2 and acquiring parameters to be calibrated received by the serial port unit 3; the processing unit 5 is used for calculating a difference value between the parameter to be calibrated and the standard parameter in the corresponding channel and transmitting the difference value to the serial port unit 3 as a data compensation quantity; the key unit 6 is used for setting various parameter information for the standard data input channels of the second port 2 and triggering the switching of the number of corresponding channels; the display unit 7 is used for displaying the parameter information output by the processing unit 5; the storage unit 8 is used for transmitting the data compensation amount read by the processing unit 5 in the storage unit to an external device; the communication unit 9 is used for transmitting the data compensation amount calculated by the processing unit 5 to an external device.

In the embodiment of the application, when an external sensor to be calibrated is required to be calibrated, an external standard sensor is connected with the second port 2, and the external standard sensor transmits standard data to the second port 2 through a standard data input channel; connecting an external sensor to be calibrated with the first port 1, and transmitting parameters to be calibrated into the serial port unit 3 through a corresponding data transmission channel by the external sensor to be calibrated; the standard data in the second port 2 and the parameters to be calibrated received by the serial port unit 3 are acquired by the acquisition unit 4; the processing unit 5 calculates the difference between the parameter to be calibrated and the standard parameter in the corresponding channel and transmits the difference to the serial port unit 3 as the data compensation quantity; and the serial port unit 3 feeds back to an external sensor to be calibrated for calibration. Compared with the existing one-to-one sensor data calibration mode, the data calibration process is complex and complicated, the scheme in the application can realize one-to-many sensor data calibration mode, and can calibrate a plurality of different sensors simultaneously, so that the efficiency of calibrating the sensors is improved.

Taking the example diagram shown in fig. 2 as an example, the acquisition unit 4 includes an AD voltage sampling circuit that converts external continuous voltage signal samples into digital signals for reading by devices connected thereto.

Taking the example diagram shown in fig. 3 as an example, the processing chip of the processing unit 5 is a Nuvoton chip, and multiple sensitivity inputs can be freely switched, and the device has the characteristics of high-speed transmission output and high dynamic response frequency.

In some examples, the calibration modes of the sensor automatic calibration device include automatic and manual modes, various parameter information of standard data input channels can be manually set through the key unit 6, various parameter functions can be adjusted, the corresponding channel number can be switched according to the number of the sensors to be calibrated externally, 1 channel conduction or N channels conduction can be switched, so that the device has two modes of automatic calibration and manual calibration, and accurate calibration of the sensitivity of the sensors to be calibrated externally can be completed manually and automatically.

Taking the example diagram shown in fig. 4 as an example, the display unit 7 not only can display the parameter information output by the processing unit 5, but also can display the state of the sensor automatic calibration device through the state indicator lamp, so that an operator can more intuitively judge the running state of the sensor automatic calibration device, and the practicability of the device is improved. The display unit 7 can display the pressure value of each connected external sensor to be calibrated, and the measurement calibration value of the external sensor to be calibrated is more accurate.

Taking the example diagrams shown in fig. 5 and 6 as an example, the data compensation amount output BY the processing unit 5 can be automatically stored BY the storage unit 8 without the need for an operator to manually record data, and the storage unit includes both data storage and parameter storage, the data storage circuit adopts a BY25Q32 chip, and the parameter storage circuit adopts an AT24C64D chip.

In some examples, the communication unit 9 transmits the data compensation amount read by the processing unit 5 in the storage unit 8 to the external device, so that an operator can intuitively read the data compensation amount output by the processing unit 5 through the external device, and the operator can conveniently analyze the condition of the external sensor to be calibrated.

In some examples, the processing unit 5 includes a crystal oscillator circuit, a reset circuit, and a power circuit, and the processing unit 5 includes core components such as the crystal oscillator circuit, the reset circuit, and the power circuit for maintaining the system to operate, and regarding the selection of the circuit type, the configuration should be performed according to actual requirements.

In some examples, a built-in independent power supply device is arranged in the device, so that the device can be fully charged at any time for handheld use, and is small in size and convenient to carry. The built-in battery has low voltage, the risk of electric shock caused by improper use is avoided, and the safety is greatly ensured.

The implementation principle of the sensor automatic calibration device in the embodiment of the application is as follows: after the standard data in the second port 2 and the parameter to be calibrated received by the serial port unit 3 are acquired through the acquisition unit 4, the processing unit 5 performs data analysis on the parameter to be calibrated and then compares the parameter to be calibrated with the standard data, calculates a difference value between the parameter to be calibrated and the standard parameter in the corresponding channel, transmits the difference value to the serial port unit 3 as a data compensation amount, and the serial port unit 3 feeds back the difference value to an external sensor to be calibrated for calibration, so that the data calibration operation of the time can be completed. Compared with the existing one-to-one sensor data calibration mode, the data calibration process is complex and complicated, and when a plurality of sensor data are needed to be measured and calibrated, each sensor can be calibrated in sequence; according to the scheme, the one-to-many sensor data calibration mode can be realized, and a plurality of different sensors can be calibrated at the same time, so that the efficiency of calibrating the sensors is improved.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. An automatic sensor calibration device, comprising:

the device comprises a first port (1), wherein a plurality of data transmission channels are arranged in the first port (1), and the first port (1) is used for being connected with an external sensor to be calibrated;

the second port (2) is provided with a plurality of standard data input channels, the second port (2) is used for being connected with an external standard sensor, the number of the data transmission channels is the same as that of the standard data input channels, and the data transmission channels and the standard data input channels are in one-to-one correspondence;

the serial port unit (3), the serial port unit (3) is connected with the first port (1);

the acquisition unit (4) is respectively connected with the second port (2) and the serial port unit (3), and the acquisition unit (4) is used for acquiring and receiving standard data received by the second port (2) and acquiring parameters to be calibrated received by the serial port unit (3);

the processing unit (5) is respectively connected with the acquisition unit (4) and the serial port unit (3), and the processing unit (5) is used for calculating a difference value between a parameter to be calibrated and a standard parameter in a corresponding channel and transmitting the difference value to the serial port unit (3) as a data compensation quantity;

the processing chip of the processing unit (5) is a Nuvoton chip.

2. The automatic sensor calibration device according to claim 1, further comprising a key unit (6), wherein the key unit (6) is connected to the processing unit (5), and the key unit (6) is configured to set a plurality of parameter information for standard data input channels of the second port (2) and is configured to trigger switching of the number of corresponding channels.

3. The automatic sensor calibration device according to claim 1, further comprising a display unit (7), wherein the display unit (7) is connected to the processing unit (5), and the display unit (7) is configured to display parameter information output by the processing unit (5).

4. The automatic sensor calibration device according to claim 1, further comprising a storage unit (8), wherein the storage unit (8) is connected to the processing unit (5), and the storage unit (8) is configured to store the data compensation amount output by the processing unit (5).

5. The automatic sensor calibration device according to claim 1, further comprising a communication unit (9), said communication unit (9) being connected to said processing unit (5), said communication unit (9) being adapted to transmit the data compensation amount calculated by said processing unit (5) to an external device.