CN215338567U

CN215338567U - Weighing circuit for no-object self-adaptive calibration

Info

Publication number: CN215338567U
Application number: CN202121612339.9U
Authority: CN
Inventors: 张伟; 于艳萍; 吴合银
Original assignee: Hunan Shiruixin Intelligent Technology Co ltd
Current assignee: Hunan Shiruixin Intelligent Technology Co ltd
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2021-12-28
Anticipated expiration: 2031-07-15

Abstract

The utility model belongs to the technical field of instrument circuits, and discloses a weighing circuit for non-entity self-adaptive calibration, which comprises a signal acquisition circuit and a signal processing circuit, wherein the signal acquisition circuit consists of a weighing sensor, and the weighing sensor acquires the gravity variation of an object, converts the gravity variation into an electric signal and transmits the electric signal to the signal processing circuit; the signal processing circuit comprises a signal converter and a data accumulator, wherein the signal converter is used for receiving the input electric signal of the corresponding weighing sensor and converting the input electric signal into a digital signal to be output; the signal processing circuit outputs a digital signal of the object weighing information; the system can realize the non-object self-adaptive calibration of the weighing apparatus, and the weight data variables of the sensors are accumulated to avoid the influence of external changes or mechanical errors on the weighing precision of the system.

Description

Weighing circuit for no-object self-adaptive calibration

Technical Field

The utility model belongs to the technical field of instrument circuits, and particularly relates to a weighing circuit for non-entity self-adaptive calibration.

Background

The current sensors generally have respective characteristic curves, and generally, 4 sensors are connected to each weighing instrument. Ideally under the same conditions. If the characteristic curves of the sensors are completely consistent, a weighing circuit connection mode which takes a plurality of sensors as a consistent process can be adopted, but the input-output proportionality coefficient and the initial value of each sensor are required to be the same, and only when two conditions are met, an accurate weighing instrument can be formed.

Under real conditions. The standards and use of multiple sensors vary, which results in inconsistent outputs, and the weighing mechanism is inaccurate, which can only be processed as shown in fig. 3, namely: when a plurality of sensors form a weighing apparatus, if the outputs of the sensors are not consistent, namely the input and output proportionality coefficients are the same, but the initial values can be different, the adjustable resistors in the junction box are adjusted, and the outputs of the plurality of sensors are artificially consistent, so that the weighing apparatus meeting the requirements is called.

However, if the use environment changes, that is, the initial value of the sensor changes, the balance of the adjustment is destroyed, so the design principle cannot ensure the stable use of the weighing apparatus for a long time, and only the calibration times are increased and the calibration time is shortened to ensure the accuracy of the weighing apparatus.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and provides a weighing circuit for non-entity self-adaptive calibration, which can realize the non-entity self-adaptive calibration of a weighing scale and avoid the influence of environmental change or mechanical error on the weighing precision by carrying out accumulation processing on weight data variables of a sensor.

In order to realize the purpose, the utility model adopts the technical scheme that: a weighing circuit for non-physical self-adaptive calibration comprises a signal acquisition circuit and a signal processing circuit, wherein the signal acquisition circuit consists of a weighing sensor, and the weighing sensor acquires the gravity variation of an object and converts the gravity variation into an electric signal to be transmitted to the signal processing circuit; the signal processing circuit comprises a signal converter and a data accumulator, wherein the signal converter is used for receiving an input electric signal of the corresponding weighing sensor and converting the input electric signal into a digital signal to be output; the signal processing circuit outputs a digital signal which is the object weighing information.

As a further improvement of the technical scheme, the weighing sensors are provided with a plurality of weighing sensors, and the measuring range and the output of each weighing sensor are not required to be consistent.

As a further improvement of the above technical solution, the weighing sensor is a resistance strain type weighing sensor.

As a further improvement of the above technical solution, the signal converter is an analog-to-digital converter.

As a further improvement of the above technical solution, the data accumulator is a data accumulation register.

The utility model has the beneficial effects that: the circuit can realize the non-object self-adaptive calibration of the weighing apparatus, avoids the influence of external change or mechanical error on the weighing precision by accumulating the weight data variables of the sensors, is different from the original parallel signal processing mode, and directly adopts the serial signal variable accumulation to obtain the accurate weighing signal result without frequent calibration for many times.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention.

Fig. 2 is a schematic diagram of the signal processing of the circuit with 4 sensors according to the present invention.

Fig. 3 is a schematic diagram of a weighing circuit using a resistance strain type weighing sensor in the prior art.

Detailed Description

The following detailed description of the present invention is given for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the present description is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.

As shown in fig. 1-2, the specific structure of the present invention is: a weighing circuit for non-physical self-adaptive calibration comprises a signal acquisition circuit and a signal processing circuit, wherein the signal acquisition circuit consists of a weighing sensor, and the weighing sensor acquires the gravity variation of an object and converts the gravity variation into an electric signal to be transmitted to the signal processing circuit; the signal processing circuit comprises a signal converter and a data accumulator, wherein the signal converter is used for receiving an input electric signal of the corresponding weighing sensor and converting the input electric signal into a digital signal to be output; the signal processing circuit outputs a digital signal which is the object weighing information.

In order to further realize the technical effect of complex calibration operation without frequently adjusting the parameters of the sensors, a plurality of weighing sensors are arranged, and the measuring range and the output of each weighing sensor are not required to be consistent.

In the embodiment, the weighing sensor is a resistance strain type weighing sensor.

Further optimized on the basis of the above embodiment, the signal converter is an analog-to-digital converter.

Further optimized on the basis of the above embodiment, the data accumulator is a data accumulation register.

The use process of the calibration weighing circuit is as follows, taking 4 weighing sensors as an example, each weighing sensor works in a stable state, namely works in a linear section, the standard full-scale range is G, and the weight output of each weighing sensor is as follows: kx (x is the current or power supply change that deformation produced), when the calibration, only need set up in the instrument each weighing sensor's k value and full scale weight G can, need not use the material object weight to carry out the calibration, therefore in the in-service use, only need set for after its zero point, can use. The specific process is as follows: 1. setting k and full range G of each weighing sensor in the instrument; 2. setting a zero point of a weighing apparatus; 3. minor physical calibration (optional step): firstly, setting k and a full-scale range G of each weighing sensor, wherein each weighing scale has an output of self weight, the outputs of the weighing sensors are Fa0, Fb0, Fc0 and Fd0, and zero point confirmation is carried out on the weighing scales at the moment, so that the weighing scales are unloaded at the moment and can be used as weighing scales, namely Fa0, Fb0, Fc0, Fd0 and 0 are equivalently set; then load the object on the balance body, at this moment the weighing sensor will produce the new deformation output: a1, b1, c1, d1, thereby outputting new force values, G1, G2, G3; g4, the four force values may be any value that is not equal, that is the actual force value loaded: G-G1 + G2+ G3+ G4, so that only the relative change of the force value is considered, and the loading part is relatively changed regardless of the change of external reasons, thereby avoiding the influence of mechanical errors and the change of external environment on the precision of the scale. When external reasons change, only one zero clearing operation is needed, and the relative weighing mode is not influenced. After the balance body is cleared and confirmed, the load is loaded, each weighing sensor has a new output value, when the weighing sensor loads force, each weighing sensor has a new output value, the instrument system can automatically match the electronic weight according to the K value and the G total amount process of the weighing sensor, and the force value loaded by the weighing sensor is accurately matched with the electronic weight.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the utility model using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments, or may be learned by practice of the utility model.

Claims

1. A weighing circuit for non-physical self-adaptive calibration is characterized by comprising a signal acquisition circuit and a signal processing circuit, wherein the signal acquisition circuit consists of a weighing sensor, and the weighing sensor acquires the gravity variation of an object and converts the gravity variation into an electric signal to be transmitted to the signal processing circuit; the signal processing circuit comprises a signal converter and a data accumulator, wherein the signal converter is used for receiving an input electric signal of the corresponding weighing sensor and converting the input electric signal into a digital signal to be output; the signal processing circuit outputs a digital signal which is the object weighing information.

2. The weighing circuit for real-object-free adaptive calibration according to claim 1, wherein the number of the weighing sensors is multiple, and the range and the output of each weighing sensor are not required to be consistent.

3. The weighing circuit for real-object-free adaptive calibration according to claim 1, wherein the weighing sensor is a resistance strain type weighing sensor.

4. The weighing circuit of claim 1, wherein the signal converter is an analog-to-digital converter.

5. The weighing circuit of claim 1, wherein the data accumulator is a data accumulation register.