CN103115715B - Yarn tension sensor system and realization method - Google Patents

Abstract

The invention relates to a yarn tension sensor system and a realization method. An existing tension sensor is too high in price and not accutate in precision, enabling the price of textile machinery to be increased, and reducing working efficiency of spinning. The yarn tension sensor system and the method comprise an electric linear hall-effect sensor, a programmable gain amplifier, a hall-signal bias circuit, a numerical control potentionmeter network, a microprogrammed control unit (MCU), a signal superposition circuit and a low-pass filter circuit. An output end of the linear hall-effect sensor is connected with the programmable gain amplifier. The hall-signal bias circuit is connected with the numerical control potentionmeter network. An amplification factor control end of the MCU is connected with the programmable gain amplifier. A bias adjusting output end of the MCU is connected with the numerical control potentionmeter network. The programmable amplifier is connected with a reverse direction amplifying input end of a signal amplifier circuit. The numerical control potentionmeter network is connected with a forward direction amplifying input end of the signal superposition circuit which is connected with the low-pass filter circuit. A yarn tension sensor of the yarn tension sensor system and the method improves precision of a common yarn tension sensor and reduces the cost of the common yarn tension sensor.

Description

A yarn tension sensor system and its implementation method

technical field

The invention relates to a textile machinery device, in particular to a yarn tension sensor system and a realization method.

Background technique

As an important sensor in the production process of the textile industry, the yarn tension sensor plays a very important role. The balance and stability of yarn tension is directly related to product quality, production efficiency and smooth progress of subsequent processing. The price of the existing tension sensor is too high and the precision is not enough, which increases the price of the textile machinery and reduces the working efficiency of spinning.

Contents of the invention

Aiming at the deficiencies of the prior art, the invention proposes a yarn tension sensor system and a realization method.

A yarn tension sensor device includes a linear Hall sensor, a program-controlled amplifier, a Hall signal bias circuit, a digitally controlled potentiometer network, an MCU, a signal superposition circuit, and a low-pass filter circuit;

The output terminal of the linear Hall sensor is connected to the input terminal of the program-controlled amplifier, the output terminal of the Hall signal bias circuit is connected to the input terminal of the numerical control potentiometer network, the magnification control terminal of the MCU is connected to the input terminal of the program-controlled amplifier, and the MCU’s The output terminal of the bias adjustment is connected to the input terminal of the digitally controlled potentiometer network, the output terminal of the program-controlled amplifier is connected to the reverse amplification input terminal of the signal amplifying circuit, the output terminal of the digitally controlled potentiometer network is connected to the positively amplifying input terminal of the signal superposition circuit, The output terminal of the signal superposition circuit is connected with the input terminal of the low-pass filter circuit.

The MCU controls the magnification of the program-controlled amplifier to adjust the magnification of the input signal of the linear Hall sensor. The output signal of the potentiometer network is sent to the signal superposition circuit for superposition, and finally the signal superposition circuit is sent to the low-pass filter circuit, and the obtained result is output.

A method for realizing a yarn tension sensor comprises the following steps:

Step 1: Send the output voltage signal of the linear Hall sensor to the programmable amplifier;

Step 2: The program-controlled amplifier amplifies the output voltage signal of the linear Hall sensor according to the magnification factor set by the MCU;

Step 3: Send the output voltage signal of the Hall signal bias circuit to the digital control potentiometer network;

Step 4: The numerical control potentiometer network divides the output voltage signal of the Hall signal bias circuit according to the resistance value ratio set by the MCU;

Step 5: Send the output signal of step 2 to the reverse amplification input terminal of the signal superposition circuit, and send the output signal of step 4 to the forward amplification input terminal of the signal superposition circuit;

Step 6: Finally, send the output of the signal superposition circuit to the input of the low-pass filter circuit, and use the output of the low-pass filter as the output of the entire hardware device. The output voltage signal of the Hall signal bias circuit described above is adjusted to The minimum output of the signal amplification circuit;

The adjustment of the magnification of the program-controlled amplifier is carried out by the MCU, and adjusted to the maximum allowable input of the signal superposition circuit;

The adjustment of the resistance-to-resistance ratio of the digitally controlled potentiometer network is performed by the MCU, and the output of the signal superposition circuit is zero when the input of the linear Hall sensor is zero.

The output signal low-pass filter circuit is a Butterworth second-order low-pass filter.

Compared with the existing technology, the invention has the beneficial effects of: improving the accuracy of the yarn tension sensor, reducing the cost of the yarn tension sensor, reducing the volume of the yarn tension sensor, improving the integration of the yarn tension sensor, and facilitating integration with various Various yarn tension controllers are used in combination to reduce the debugging time of yarn tension sensors in various yarn tension controllers.

Description of drawings

Fig. 1 is a hardware block diagram of the present invention;

Fig. 2 is a block diagram of the method realization of the present invention.

Detailed ways

As shown in Figure 1, a yarn tension sensor device includes a linear Hall sensor, a program-controlled amplifier, a Hall signal bias circuit, a digitally controlled potentiometer network, an MCU, a signal superposition circuit and a low-pass filter circuit;

The output terminal of the linear Hall sensor is connected to the input terminal of the program-controlled amplifier, the output terminal of the Hall signal bias circuit is connected to the input terminal of the numerical control potentiometer network, the magnification control terminal of the MCU is connected to the input terminal of the program-controlled amplifier, and the MCU’s The output terminal of the bias adjustment is connected to the input terminal of the digitally controlled potentiometer network, the output terminal of the program-controlled amplifier is connected to the reverse amplification input terminal of the signal amplifying circuit, the output terminal of the digitally controlled potentiometer network is connected to the positively amplifying input terminal of the signal superposition circuit, The output end of the signal superposition circuit is connected with the input end of the low-pass filter circuit;

The MCU controls the magnification of the program-controlled amplifier to adjust the magnification of the input signal of the linear Hall sensor. The output signal of the potentiometer network is sent to the signal superposition circuit for superposition, and finally the signal superposition circuit is sent to the low-pass filter circuit, and the obtained result is output;

As shown in Figure 2, a method for implementing a yarn tension sensor includes the following steps:

Step 1: Send the output voltage signal of the linear Hall sensor to the programmable amplifier;

Step 2: The MCU adjusts the magnification of the program-controlled amplifier to the maximum allowable input of the signal superposition circuit, and the program-controlled amplifier amplifies the output voltage signal of the linear Hall sensor according to the magnification set by the MCU;

Step 3: Send the output voltage signal of the Hall signal bias circuit to the digital control potentiometer network;

Step 4: The MCU adjusts the resistance resistance ratio so that the output of the signal superposition circuit is zero when the input of the linear Hall sensor is zero, and the numerical control potentiometer network compares the output voltage of the Hall signal bias circuit according to the resistance resistance ratio set by the MCU The signal is divided;

Step 5: Send the output signal of step 2 to the reverse amplification input terminal of the signal superposition circuit, and send the output signal of step 4 to the forward amplification input terminal of the signal superposition circuit;

Step 6: Finally, send the output of the signal superposition circuit to the input of the low-pass filter circuit, and use the output of the low-pass filter as the output of the entire hardware device.

Claims (2)

1. a yarn tension sensor device, comprises linear hall sensor, programmable amplifier, hall signal biasing circuit, digital potentiometer network, MCU, superimposed signal circuit and low-pass filter circuit, it is characterized in that: the output terminal of linear hall sensor is connected with the input end of programmable amplifier, the output terminal of hall signal biasing circuit is connected with the input end of digital potentiometer network, the enlargement factor control end of MCU is connected with the input end of programmable amplifier, the bias-adjusted output terminal of MCU is connected with digital potentiometer network input end, the output terminal of programmable amplifier is connected with the reverse amplification input end of superimposed signal circuit, the output terminal of digital potentiometer network amplifies input end with the forward of superimposed signal circuit and is connected, the output terminal of superimposed signal circuit is connected with the input end of low-pass filter circuit,

MCU controls the enlargement factor of programmable amplifier, adjust the enlargement factor of linear hall sensor input signal, MCU controls the resistance ratio of digital potentiometer network, adjust the intrinsic standoff ratio of hall signal biasing circuit output voltage, the output signal of programmable amplifier and digital potentiometer network is delivered to superimposed signal circuit to superpose, finally superimposed signal circuit is sent into low-pass filter circuit, and by the result output obtaining.

2. a kind of yarn tension sensor device according to claim 1, is characterized in that: described low-pass filter circuit is a Butterworth second-order low-pass filter.