Hot press for non-woven fabric processing

Abstract

The utility model discloses a hot press for processing non-woven fabrics. The hot press comprises a temperature sensor, a signal conditioning circuit, a controller, an isolating circuit and a wireless transceiver which are connected in sequence, the signal conditioning circuit comprises a signal input circuit and a signal conditioning circuit which are connected in sequence, a signal protection circuit is connected with the signal conditioning circuit, and the signal protection circuit and the signal conditioning circuit are both connected with the controller. According to the utility model, the temperature value can be accurately obtained and remotely checked.

Description

Technical Field

[0001] This utility model relates to the field of hot presses, and in particular to a hot press for processing nonwoven fabrics. Background Technology

[0002] A hot press is a device that heats two pre-fluxed, tin-plated parts to a temperature sufficient to melt and flow the solder, forming a permanent electromechanical connection between the parts and the solder after solidification. Medical devices, for safety reasons, are mostly disposable items, and many are made of non-woven fabrics. This requires hot pressing different materials to achieve the desired effect. Existing hot presses lack accurate temperature acquisition, easily leading to misjudgments by the controller or processor, and do not provide wireless temperature data, requiring manual monitoring. Therefore, the inventors of this utility model provide a hot press for non-woven fabric processing to solve the above problems. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this invention is to provide a hot press for nonwoven fabric processing that can accurately acquire and remotely view temperature values.

[0004] Based on this, the present invention provides a hot press for nonwoven fabric processing, the device comprising:

[0005] The components are connected in sequence: a temperature sensor, a signal conditioning circuit, a controller, an isolation circuit, and a wireless transceiver.

[0006] The signal conditioning circuit includes: a signal input circuit and a signal conditioning circuit connected in sequence; a signal protection circuit connected to the signal conditioning circuit; and both the signal protection circuit and the signal conditioning circuit are connected to the controller.

[0007] The signal input circuit includes: a signal sampler, a first inductor, a first capacitor, a first diode, a second diode, and a first resistor; the power supply terminal of the signal sampler is connected to voltage VCC2, and the ground terminal of the signal sampler is grounded; the signal sampler is used to sample the temperature signal collected by the temperature sensor; the output terminal of the signal sampler is connected to the cathode of the first diode and one end of the first inductor, respectively; the other end of the first inductor is connected to the anode of the second diode, one end of the first resistor and one end of the first capacitor, and the other end of the first capacitor and the anode of the first diode are both grounded; the other end of the first resistor serves as the output terminal of the signal input circuit.

[0008] The signal conditioning circuit includes: a second capacitor, a third resistor, a fourth resistor, a first operational amplifier, and a second operational amplifier. One end of the second capacitor is connected to the output terminal of the signal input circuit, and the other end is connected to the non-inverting input terminal of the first operational amplifier. The output terminal of the first operational amplifier is connected to the non-inverting input terminal of the second operational amplifier, and the inverting input terminal of the second operational amplifier is connected to its output terminal. The output terminal of the second operational amplifier is connected to one end of the third resistor, and the other end of the third resistor is connected to one end of the fourth resistor and the inverting input terminal of the first operational amplifier. The other end of the fourth resistor is grounded, and the output terminal of the first operational amplifier serves as the output terminal of the signal conditioning circuit.

[0009] The signal protection circuit includes a first transistor, a third capacitor, and a fifth resistor. The collector of the first transistor is connected to the non-inverting input of the first operational amplifier. The base of the first transistor is connected to one end of the fifth resistor and one end of the third capacitor. The other end of the third capacitor and the emitter of the first transistor are both grounded. The other end of the fifth resistor is connected to the controller.

[0010] The isolation circuit includes an optocoupler isolation circuit.

[0011] The optocoupler isolation circuit is also connected in sequence to a NOT gate circuit and a filter circuit.

[0012] The signal sampler is a DAM-3056AH model.

[0013] The controller includes a PLC controller.

[0014] This invention utilizes a temperature sensor to acquire temperature signals. A signal conditioning circuit modulates the temperature signal acquired by the sensor. The signal input circuit samples the temperature signal and uses an LC circuit composed of a first inductor and a first capacitor in parallel for filtering. The signal conditioning circuit employs a first operational amplifier and a second operational amplifier in series to eliminate signal imbalance, effectively preventing signal imbalance due to interference during transmission and greatly improving signal anti-interference capability. A signal protection circuit cuts off abnormal signals, providing excellent protection. The temperature signal is output to an isolation circuit via the controller, which isolates the temperature signal and transmits it to an external terminal device. This invention allows for accurate acquisition and remote viewing of temperature values. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a hot press for nonwoven fabric processing provided in an embodiment of this utility model;

[0017] Figure 2 This is a schematic diagram of the signal conditioning circuit provided in an embodiment of the present invention. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Figure 1 This is a schematic diagram of a hot press for nonwoven fabric processing provided in an embodiment of the present invention. The device includes:

[0020] The temperature sensor 101, signal conditioning circuit 102, controller 103, isolation circuit 104, and wireless transceiver 105 are connected in sequence.

[0021] The temperature sensor collects the temperature of the heating components of the hot press, such as the electric heating roller.

[0022] Figure 2 This is a schematic diagram of a signal conditioning circuit provided in an embodiment of the present utility model. The signal conditioning circuit includes: a signal input circuit and a signal conditioning circuit connected in sequence; a signal protection circuit connected to the signal conditioning circuit; and both the signal protection circuit and the signal conditioning circuit are connected to the controller.

[0023] The signal input circuit includes: a signal sampler, a first inductor L1, a first capacitor C1, a first diode D1, a second diode D2, and a first resistor R2; the power supply terminal of the signal sampler is connected to voltage VCC2, and the ground terminal of the signal sampler is grounded. The signal sampler is used to sample the temperature signal collected by the temperature sensor. The output terminal of the signal sampler is connected to the cathode of the first diode D1 and one end of the first inductor L1, respectively. The other end of the first inductor L1 is connected to the anode of the second diode D2, one end of the first resistor R2 and one end of the first capacitor C1, and the other end of the first capacitor C1 and the anode of the first diode D1 are both grounded. The other end of the first resistor R2 serves as the output terminal of the signal input circuit.

[0024] The signal conditioning circuit includes: a second capacitor C2, a third resistor R3, a fourth resistor R4, a first operational amplifier AR1, and a second operational amplifier AR2. One end of the second capacitor C2 is connected to the output terminal of the signal input circuit, and the other end is connected to the non-inverting input terminal of the first operational amplifier AR1. The output terminal of the first operational amplifier AR1 is connected to the non-inverting input terminal of the second operational amplifier AR2. The inverting input terminal of the second operational amplifier AR2 is connected to the output terminal of the second operational amplifier AR2. The output terminal of the second operational amplifier AR2 is connected to one end of the third resistor R3. The other end of the third resistor R3 is connected to one end of the fourth resistor R4 and the inverting input terminal of the first operational amplifier AR1. The other end of the fourth resistor R4 is grounded. The output terminal of the first operational amplifier AR1 serves as the output terminal of the signal conditioning circuit.

[0025] The first operational amplifier AR1 and the second operational amplifier AR2 are connected in series to condition the input signal. Specifically, since the input signal at the non-inverting input of the first operational amplifier AR1 has an offset voltage, the second operational amplifier AR2 uses voltage follower compensation to feed back the output signal of the first operational amplifier AR1 to the inverting input of the first operational amplifier AR1. The fourth resistor R4 and the fifth resistor R5 divide the feedback voltage of the second operational amplifier AR2 to obtain a compensation voltage with the same amplitude as the offset voltage, thereby canceling the offset voltage and finally completing the signal conditioning, which greatly improves the signal's anti-interference ability.

[0026] The signal protection circuit includes: a first transistor T1, a third capacitor C3, and a fifth resistor R5; the collector of the first transistor T1 is connected to the non-inverting input terminal of the first operational amplifier AR1, the base of the first transistor T1 is connected to one end of the fifth resistor R5 and one end of the third capacitor C3, the other end of the third capacitor C3 and the emitter of the first transistor T1 are both grounded, and the other end of the fifth resistor R5 is connected to the controller.

[0027] The controller sends a cutoff command to the signal protection circuit, which energizes the base of the first transistor T1, thereby quickly short-circuiting the signal at the non-inverting input of the first operational amplifier AR1 and cutting off the abnormal signal at the source, thus providing a good defense.

[0028] The isolation circuit includes: an optocoupler isolation circuit.

[0029] The optocoupler isolation circuit is also connected to a NOT gate circuit.

[0030] NOT gates are used to shape signals to improve signal quality, while filter circuits remove harmonic components.

[0031] The signal sampler is a DAM-3056AH model.

[0032] The controller includes a PLC controller.

[0033] This invention utilizes a temperature sensor to acquire temperature signals. A signal conditioning circuit modulates the temperature signal acquired by the sensor. The signal input circuit samples the temperature signal and uses an LC circuit composed of a first inductor and a first capacitor in parallel for filtering. The signal conditioning circuit employs a first operational amplifier and a second operational amplifier in series to eliminate signal imbalance, effectively preventing signal imbalance due to interference during transmission and greatly improving signal anti-interference capability. A signal protection circuit cuts off abnormal signals, providing excellent protection. The temperature signal is output to an isolation circuit via the controller, which isolates the temperature signal and transmits it to an external terminal device. This invention allows for accurate acquisition and remote viewing of temperature values.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A hot press for processing nonwoven fabrics, characterized in that, include: The components are connected in sequence: a temperature sensor, a signal conditioning circuit, a controller, an isolation circuit, and a wireless transceiver. The signal conditioning circuit includes: a signal input circuit and a signal conditioning circuit connected in sequence; a signal protection circuit connected to the signal conditioning circuit; and both the signal protection circuit and the signal conditioning circuit are connected to the controller. The signal input circuit includes: a signal sampler, a first inductor, a first capacitor, a first diode, a second diode, and a first resistor; the power supply terminal of the signal sampler is connected to voltage VCC2, and the ground terminal of the signal sampler is grounded; the signal sampler is used to sample the temperature signal collected by the temperature sensor; the output terminal of the signal sampler is connected to the cathode of the first diode and one end of the first inductor, respectively; the other end of the first inductor is connected to the anode of the second diode, one end of the first resistor and one end of the first capacitor, and the other end of the first capacitor and the anode of the first diode are both grounded; the other end of the first resistor serves as the output terminal of the signal input circuit.

2. The hot press for nonwoven fabric processing according to claim 1, wherein The signal conditioning circuit includes: a second capacitor, a third resistor, a fourth resistor, a first operational amplifier, and a second operational amplifier; one end of the second capacitor is connected to the output terminal of the signal input circuit, and the other end is connected to the non-inverting input terminal of the first operational amplifier; the output terminal of the first operational amplifier is connected to the non-inverting input terminal of the second operational amplifier; the inverting input terminal of the second operational amplifier is connected to the output terminal of the second operational amplifier; the output terminal of the second operational amplifier is connected to one end of the third resistor; the other end of the third resistor is connected to one end of the fourth resistor and the inverting input terminal of the first operational amplifier; the other end of the fourth resistor is grounded; and the output terminal of the first operational amplifier serves as the output terminal of the signal conditioning circuit.

3. The hot press for nonwoven fabric processing according to claim 2, wherein The signal protection circuit includes: a first transistor, a third capacitor, and a fifth resistor; the collector of the first transistor is connected to the non-inverting input terminal of the first operational amplifier, the base of the first transistor is connected to one end of the fifth resistor and one end of the third capacitor, the other end of the third capacitor and the emitter of the first transistor are both grounded, and the other end of the fifth resistor is connected to the controller.

4. The hot press for nonwoven fabric processing according to claim 1, wherein The isolation circuit includes: an optocoupler isolation circuit.

5. The hot press for nonwoven fabric processing according to claim 4, wherein The optocoupler isolation circuit is also connected to a NOT gate circuit.

6. The hot press for nonwoven fabric processing according to claim 1, wherein The signal sampler is a DAM-3056AH model.

7. The hot press for nonwoven fabric processing according to any one of claims 1 to 6, wherein The controller includes a PLC controller.

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