Waste steel briquetting machine monitoring system

Abstract

The utility model provides a waste steel briquetting machine monitoring system, and belongs to the technical field of equipment monitoring. The waste steel briquetting machine monitoring system comprises a pressure head position monitoring module and a pressure head control module, the pressure head position monitoring module is connected with the input end of the pressure head control module; the output end of the pressing head control module is used for being connected with the control end of a proportional valve in a hydraulic system of the scrap steel briquetting machine. The pressure head position monitoring module is configured to monitor the position of a pressure head of the scrap steel briquetting machine, and the pressure head control module is configured to control the speed of the pressure head of the scrap steel briquetting machine. According to the invention, the problem of non-uniform thickness of the briquette can be solved by accurately controlling the briquetting speed.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of device monitoring, and in particular to a scrap steel briquetting machine monitoring system. BACKGROUND

[0002] The scrap steel briquetting machine, as a key device in the steel industry, can process scattered scrap steel into briquettes for convenient transportation and smelting. With the large-scale development of the scrap steel recycling industry, the working precision and efficiency of the briquetting machine are increasingly required. However, in the traditional operation, due to the lack of effective monitoring and control means, the precise control of the briquette thickness cannot be achieved, and problems such as uneven briquette thickness are prone to occur. CONTENT OF THE UTILITY MODEL

[0003] The embodiments of the present disclosure provide a scrap steel briquetting machine monitoring system to solve the problem of uneven briquette thickness by precisely controlling the briquette speed.

[0004] The embodiments of the present disclosure provide a scrap steel briquetting machine monitoring system, comprising: a pressure head position monitoring module and a pressure head control module;

[0005] The pressure head position monitoring module is connected with the input end of the pressure head control module;

[0006] The output end of the pressure head control module is used to connect the control end of the proportional valve in the hydraulic system of the scrap steel briquetting machine;

[0007] The pressure head position monitoring module is configured to monitor the position of the pressure head of the scrap steel briquetting machine, and the pressure head control module is configured to control the speed of the pressure head of the scrap steel briquetting machine.

[0008] In an exemplary embodiment of the present disclosure, the pressure head control module comprises:

[0009] a first amplification circuit, a comparison circuit, an integration circuit, a transistor Q1, and an addition circuit;

[0010] The input end of the first amplification circuit is connected with the pressure head position monitoring module, the output end of the first amplification circuit is connected with the first input end of the comparison circuit, and the second input end of the comparison circuit is connected with a reference voltage REF1;

[0011] The output end of the comparison circuit is connected with the control end of the transistor Q1, the first end of the transistor Q1 is connected with the first input end of the addition circuit, and the second end of the transistor Q1 is connected with the output end of the integration circuit,

[0012] The second output end of the addition circuit is connected with a reference voltage REF2, and the output end of the addition circuit is the output end of the pressure head control module.

[0013] In an example embodiment of the present disclosure, a scrap steel briquetting machine monitoring system further comprises:

[0014] a potentiometer U4 and a resistor R12;

[0015] The control end of the potentiometer U4 is connected with the master control chip, the low end potential end of the potentiometer U4 is grounded, the sliding potential end of the potentiometer U4 is connected with the first power supply through the resistor R12, and the sliding potential end of the potentiometer U4 is the reference voltage REF1.

[0016] In an example embodiment of the present disclosure, an integration circuit comprises:

[0017] a resistor R4, a resistor R5, an operational amplifier U3A, a capacitor C1 and a resistor R7;

[0018] The first end of the resistor R4 is used for receiving a reference signal REF3, and the second end of the resistor R4 is respectively connected with the inverting input end of the operational amplifier U3A and the first end of the capacitor C1.

[0019] The first end of the resistor R5 is used for grounding, and the second end of the resistor R5 is connected with the non-inverting input end of the operational amplifier U3A.

[0020] The output end of the operational amplifier U3A is respectively connected with the second end of the capacitor C1 and the first end of the resistor R7, and the second end of the resistor R7 is connected with the emitter of the transistor Q1.

[0021] In an example embodiment of the present disclosure, an addition circuit comprises:

[0022] a resistor R8, an operational amplifier U3B, a resistor R9 and a resistor R6;

[0023] The first end of the resistor R8 is used for receiving a reference signal REF2, and the second end of the resistor R8 is respectively connected with the collector of the transistor Q1 and the non-inverting input end of the operational amplifier U3B.

[0024] The inverting input end of the operational amplifier U3B is grounded through the resistor R6, and the output end of the operational amplifier U3B is connected with the inverting input end of the operational amplifier U3B through the resistor R9 in a feedback mode; and the output end of the operational amplifier U3B is used for connecting the control end of a proportional valve in a hydraulic system of a scrap steel briquetting machine.

[0025] In an example embodiment of the present disclosure, a first amplification circuit comprises:

[0026] a resistor R1, a resistor R2, a resistor R3 and an operational amplifier U1A;

[0027] The first end of the resistor R1 is connected with the pressure head position monitoring module, and the second end of the resistor R1 is connected with the non-inverting input end of the operational amplifier U1A.

[0028] The first end of the resistor R2 is grounded, the second end of the resistor R2 is connected with the inverting input end of the operational amplifier U1A, and the output end of the operational amplifier U1A is connected with the input end of the comparison circuit through the resistor R3.

[0029] In an exemplary embodiment of the present disclosure, a scrap steel briquetting machine monitoring system further comprises:

[0030] a temperature sensor, a second amplification circuit, a multi-channel AD conversion chip, a master control chip and a multi-way switch;

[0031] The output end of the temperature sensor is connected with the input end of the second amplification circuit, and the temperature sensor is configured to monitor the temperature of the scrap steel briquetting machine.

[0032] The output end of the second amplification circuit is connected with the input end of the multi-channel AD conversion chip, and the output end of the multi-channel AD conversion chip is connected with the input end of the master control chip.

[0033] The output end of the master control chip is connected with the input end of the multi-way switch, and the multi-way switch is used to control the rotating speed of the plurality of fans.

[0034] In an exemplary embodiment of the present disclosure, the second amplification circuit comprises:

[0035] a resistor R13, a resistor R14, an operational amplifier U5A and a resistor R11.

[0036] The first end of the resistor R13 is connected with the first output end of the temperature sensor, and the first end of the resistor R14 is connected with the second output end of the temperature sensor.

[0037] The second end of the resistor R13 is connected with the non-inverting input end of the operational amplifier U5A, and the second end of the resistor R14 is connected with the inverting input end of the operational amplifier U5A; the output end of the operational amplifier U5A is connected with the inverting input end of the operational amplifier U5A through the resistor R11.

[0038] The scrap steel briquetting machine monitoring system provided by the embodiments of the present disclosure has the beneficial effects that: through the accurate monitoring of the pressure head position monitoring module, the specific position of the pressure head of the scrap steel briquetting machine can be grasped in real time, reliable data support is provided for subsequent accurate control, and the accuracy and stability in the briquetting process are improved.

[0039] The ram control module of the present disclosure finely adjusts the ram speed of the scrap steel briquetting machine according to the monitored position information, and reduces the ram speed when the ram reaches the reference ram position, so as to realize accurate control of the briquette thickness and avoid uneven briquette thickness caused by too fast ram speed. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor.

[0041] Figure 1 is a circuit diagram of the ram control module provided by the present disclosure;

[0042] Figure 2 is a circuit diagram of the potentiometer provided by the present disclosure;

[0043] Figure 3 is a circuit diagram of the fan control module provided by the present disclosure. DETAILED DESCRIPTION

[0044] In order to make those skilled in the art better understand the present scheme, the technical solutions in the embodiments of the present scheme will be clearly described below in combination with the drawings in the embodiments of the present scheme. Obviously, the described embodiments are only some of the embodiments of the present scheme, not all. Based on the embodiments in the present scheme, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present scheme.

[0045] The terms "include", and other any variants thereof, in the specification and claims of the present scheme and the above-mentioned drawings, refer to "include but not limited to", and are intended to cover non-exclusive inclusion, and are not limited to the examples listed in the text. In addition, the terms "first" and "second" and the like are used to distinguish different objects, not to describe a specific order.

[0046] The implementation of the present disclosure is described in detail below in combination with specific drawings:

[0047] Figure 1 is a structural schematic diagram of a scrap steel briquetting machine monitoring system provided by the present disclosure. Referring to Figure 1 The scrap steel briquetting machine monitoring system comprises a ram position monitoring module and a ram control module.

[0048] The ram position monitoring module is connected with the input end of the ram control module.

[0049] The output end of the ram control module is used for connecting the control end of the proportional valve in the hydraulic system of the scrap steel briquetting machine.

[0050] The ram position monitoring module is configured to monitor the position of the ram of the scrap steel briquetting machine, and the ram control module is configured to control the speed of the ram of the scrap steel briquetting machine.

[0051] In the embodiment, the ram control module comprises:

[0052] The first amplification circuit, the comparison circuit, the integration circuit, the transistor Q1 and the addition circuit.

[0053] The input end of the first amplification circuit is connected with the ram position monitoring module, the output end of the first amplification circuit is connected with the first input end of the comparison circuit, and the second input end of the comparison circuit is connected with the reference voltage REF1.

[0054] The output end of the comparison circuit is connected with the control end of the transistor Q1, the first end of the transistor Q1 is connected with the first input end of the addition circuit, the second end of the transistor Q1 is connected with the output end of the integration circuit,

[0055] The second output end of the addition circuit is connected with the reference voltage REF2, and the output end of the addition circuit is the output end of the ram control module.

[0056] In the embodiment, the ram position monitoring module can comprise a displacement sensor. The displacement sensor is configured to acquire the position data of the ram in real time, and transmit the obtained ram position analog signal to the first amplification circuit of the ram control module through a shielded cable. The first amplification circuit is composed of an operational amplifier and a resistor in a differential amplification structure, and the gain thereof is set by the resistance ratio. The first amplification circuit can amplify the weak displacement signal to a voltage range suitable for subsequent processing, and can also effectively suppress common-mode interference and ensure the integrity of the signal.

[0057] The amplified signal enters the comparison circuit. There is a pre-set reference value REF1 in the comparison circuit, and the reference value REF1 corresponds to a reference ram position. When it is judged that the actual position of the ram reaches the reference ram position (the ram position signal is greater than the reference ram position signal), a corresponding control signal can be output to control the subsequent circuit, so that the speed of the ram is reduced, the stability of the briquetting quality is ensured, and excessive briquetting is avoided.

[0058] The control signal output by the comparison circuit can control the working state of the integration circuit and the addition circuit. When the actual position of the ram has not reached the reference ram position, the integration circuit is cut off, and only the addition circuit is used to output the control signal, which is then transmitted to the control end of the proportional valve in the hydraulic system of the scrap steel briquetting machine to control the opening degree of the proportional valve.

[0059] When the actual position of the ram reaches the reference ram position, the integration circuit is turned on, and the addition circuit adds the signal processed by the integration circuit to the original signal of the addition circuit. The output voltage of the addition circuit gradually decreases, and the output voltage of the addition circuit is transmitted to the control end of the proportional valve in the scrap steel briquetting machine hydraulic system. The proportional valve adjusts its opening degree according to the control signal, changes the flow and pressure of the hydraulic system, reduces the speed of the ram, and ensures that the ram can accurately reach the ideal position.

[0060] The embodiment utilizes a high-precision displacement sensor to monitor the position of the ram in real time, and effectively amplifies and purifies the signal through the first amplification circuit, ensuring the accuracy and reliability of the data. The embodiment can timely adjust the speed of the ram through the intelligent comparison of the comparison circuit and the preset reference value, and prevent over-briquetting to protect the safety of the equipment and materials.

[0061] The cooperation of the integration circuit and the addition circuit of the embodiment realizes fine adjustment of the speed of the ram. When the ram reaches the reference ram position, the speed of the ram is reduced to realize precise control of the briquette thickness and avoid uneven briquette thickness caused by excessive speed of the ram.

[0062] In summary, the embodiment not only enhances the automation level of the scrap steel briquetting machine, but also greatly reduces human intervention and production costs, bringing more efficient and intelligent production solutions to the scrap steel recycling industry, promoting sustainable use of resources and green development of the industry.

[0063] As shown in FIGS. Figure 1 and Figure 2 In one embodiment of the present disclosure, a scrap steel briquetting machine monitoring system further comprises:

[0064] The potentiometer U4 and the resistor R12.

[0065] The control end of the potentiometer U4 is connected with the main control chip, the low end of the potentiometer U4 is grounded, the sliding potential end of the potentiometer U4 is connected with the first power supply through the resistor R12, and the sliding potential end of the potentiometer U4 is the reference voltage REF1.

[0066] In the embodiment, the comparison circuit comprises an operational amplifier U2.

[0067] The output end of the potentiometer U4 is connected with the inverting input end of the operational amplifier U2, and the non-inverting input end of the operational amplifier U2 is connected with the output end of the first amplification circuit.

[0068] The output end of the operational amplifier U2 is connected with the base of the transistor Q1 through the resistor R10.

[0069] The collector of the transistor Q1 is connected with the input end of the addition circuit, and the emitter of the transistor Q1 is connected with the output end of the integration circuit.

[0070] In this embodiment, the integrating circuit includes:

[0071] Resistor R4, resistor R5, op-amp U3A, capacitor C1 and resistor R7.

[0072] The first end of resistor R4 is used to receive the reference signal REF3, and the second end of resistor R4 is connected to the inverting input of op-amp U3A and the first end of capacitor C1, respectively.

[0073] The first end of resistor R5 is used for grounding, and the second end of resistor R5 is connected to the non-inverting input of op-amp U3A.

[0074] The output terminal of op-amp U3A is connected to the second terminal of capacitor C1 and the first terminal of resistor R7, respectively. The second terminal of resistor R7 is connected to the emitter of transistor Q1.

[0075] In this embodiment, potentiometer U4 outputs an adjustable reference voltage REF1, which is fed to the inverting input of operational amplifier U2. The amplified pressure head position signal output by the first amplifier circuit is connected to the non-inverting input of operational amplifier U2.

[0076] Operational amplifier U2 is a voltage comparator that compares the voltages at its non-inverting and inverting inputs. If the voltage at the non-inverting input (the signal output from the first amplifier circuit) is greater than the voltage at the inverting input (the reference voltage output from potentiometer U4), op-amp U2 outputs a high-level signal. Conversely, it outputs a low-level signal.

[0077] The signal output from operational amplifier U2 passes through resistor R10 and reaches the base of transistor Q1. Resistor R10 limits current and protects transistor Q1. When operational amplifier U2 outputs a high level, transistor Q1 is turned on. When it outputs a low level, transistor Q1 is turned off. When transistor Q1 is turned on, its collector outputs a signal to the adder circuit, while its emitter is connected to the output of the integrator circuit for subsequent signal processing.

[0078] In this embodiment, the first terminal of resistor R4 receives the reference signal REF3, which enters the inverting input of operational amplifier U3A through resistor R4. Resistor R5 is grounded, and its function is to provide a stable ground potential reference for the non-inverting input of operational amplifier U3A.

[0079] In the embodiment, the comparison circuit compares the pressure head position signal output by the first amplification circuit with the reference voltage set by the potentiometer, and outputs a control signal to control the conduction and cutoff of the transistor Q1. When the reference signal REF3 is input, the operational amplifier U3A performs integration operation on the input signal due to the presence of the capacitor C1. The capacitor C1 is continuously charged over time, so that the output voltage of the operational amplifier U3A gradually changes. The output signal of the operational amplifier U3A is fed back to the second end of the capacitor C1 on one hand, and is transmitted to the emitter of the transistor Q1 through the resistor R7 on the other hand.

[0080] For example, the resistor R4, the capacitor C1 and the operational amplifier U3A constitute an integration circuit for inversely integrating the reference signal REF3, so as to output a negative ramp voltage, and the absolute value of the ramp voltage gradually increases. The addition circuit adds the negative ramp voltage signal processed by the integration circuit to the original signal of the addition circuit, and the output voltage of the addition circuit gradually decreases. The output voltage of the addition circuit is transmitted to the control end of the proportional valve in the hydraulic system of the scrap steel briquetting machine. The proportional valve adjusts the opening degree thereof according to the control signal, changes the flow and pressure of the hydraulic system, reduces the speed of the pressure head, and ensures that the pressure head can accurately reach the ideal position.

[0081] For example, when processing automobile scrap steel, the accurate control of the speed of the pressure head is extremely crucial due to the complexity of the materials and the presence of many thin components. The potentiometer sets a basic reference voltage, and the comparison circuit compares the pressure head position signal output by the first amplification circuit with the basic reference voltage. When the pressure head position signal monitored by the pressure head position monitoring module reaches the basic reference voltage, the comparison circuit outputs a control signal to make the transistor Q1 conduct, and the integration circuit starts integration operation according to the REF3. The signals processed by the two are integrated by the addition circuit, the opening degree of the proportional valve is reduced, the speed of the pressure head is reduced, and the pressure head is prevented from moving too fast to cause the briquettes to be too thin.

[0082] The embodiment can accurately adjust the speed according to the actual position of the pressure head through the cooperative work of the comparison circuit and the integration circuit. The speed of the pressure head is prevented from being too fast to cause the briquettes to be excessively thick, the uniformity of the briquettes is improved, the processing of complex materials is effectively handled, and the working efficiency and reliability of the scrap steel briquetting machine are improved.

[0083] In one embodiment of the disclosure, the addition circuit comprises:

[0084] The resistor R8, the operational amplifier U3B, the resistor R9 and the resistor R6.

[0085] The first end of the resistor R8 is used for receiving the reference signal REF2, and the second end of the resistor R8 is connected with the collector of the transistor Q1 and the non-inverting input end of the operational amplifier U3B, respectively.

[0086] The inverting input terminal of the operational amplifier U3B is connected to ground through resistor R6, and the output terminal of the operational amplifier U3B is connected to the inverting input terminal of the operational amplifier U3B through resistor R9 to form a feedback connection. The output terminal of the operational amplifier U3B is used to connect to the control terminal of the proportional valve in the hydraulic system of the scrap steel briquetting machine.

[0087] In this embodiment, the first end of resistor R8 receives a reference signal REF2, and the collector output signal of transistor Q1 is also connected to the second end of resistor R8, and then is input to the non-inverting input terminal of operational amplifier U3B. The inverting input terminal of operational amplifier U3B is connected to ground through resistor R6, which provides a stable reference potential for the inverting input terminal.

[0088] The output terminal of the operational amplifier U3B is connected to the inverting input terminal of the operational amplifier U3B through resistor R9 to form a negative feedback loop. This negative feedback loop can stabilize the gain of the operational amplifier and ensure the stability of the circuit. The operational amplifier U3B performs superposition processing on the reference signal REF2 at the non-inverting input terminal and the signal output by the collector of transistor Q1. Specifically, when transistor Q1 is turned on, the signal output by the collector will be superimposed with the reference signal REF2 at the non-inverting input terminal of the operational amplifier U3B. The operational amplifier U3B performs amplification operation according to the potential difference between the non-inverting input terminal and the inverting input terminal, and outputs a corresponding voltage signal. This voltage signal is fed back to the inverting input terminal of the operational amplifier U3B through resistor R9 to adjust the output of the operational amplifier U3B, so that it reaches a stable state. The signal output by the output terminal of the operational amplifier U3B is transmitted to the control terminal of the proportional valve in the hydraulic system of the scrap steel briquetting machine, and the opening of the proportional valve is changed to realize the control of the ram speed.

[0089] In this embodiment, by superimposing the reference signal REF2 and the signal output by the collector of transistor Q1, the signal for controlling the proportional valve can be accurately generated, thereby realizing precise control of the ram speed and improving the quality and consistency of the scrap steel briquetting. In this embodiment, the size of the reference signal REF2 can be adjusted to flexibly change the output of the operational amplifier U3B to adapt to different scrap steel processing requirements, thereby improving the versatility and adaptability of the system.

[0090] In one embodiment of the present disclosure, a first amplification circuit comprises:

[0091] resistor R1, resistor R2, resistor R3, and operational amplifier U1A.

[0092] The first end of resistor R1 is connected to a ram position monitoring module, and the second end of resistor R1 is connected to the non-inverting input terminal of operational amplifier U1A.

[0093] The first end of resistor R2 is used for grounding, the second end of resistor R2 is connected to the inverting input terminal of operational amplifier U1A, and the output terminal of operational amplifier U1A is connected to the input terminal of a comparison circuit.

[0094] In this embodiment, the first terminal of resistor R1 receives a signal from the pressure head position monitoring module, which is then transmitted to the non-inverting input of operational amplifier U1A. The first terminal of resistor R2 is grounded, and the second terminal is connected to the inverting input of operational amplifier U1A, providing a stable reference potential for the inverting input of operational amplifier U1A.

[0095] The output of op-amp U1A is fed back to its inverting input through resistor R3, forming a negative feedback loop. This loop can stabilize the gain of the op-amp and keep the amplification factor of the circuit at a relatively stable value.

[0096] Based on the "virtual short" and "virtual open" characteristics of operational amplifiers, the potentials at the non-inverting and inverting input terminals of op-amp U1A are approximately equal, and the current flowing into the input terminals is almost zero. Since resistor R2 is grounded, the potential at the inverting input terminal is zero, so the potential at the non-inverting input terminal is also approximately zero (virtual ground).

[0097] The signal output from the pressure head position monitoring module, after passing through resistor R1, generates a voltage at the non-inverting input of operational amplifier U1A. Operational amplifier U1A amplifies the signal based on the potential difference between the non-inverting and inverting inputs and adjusts the output via feedback through resistor R3, ensuring the output voltage is proportional to the input signal. The amplified signal is then output from the output of operational amplifier U1A and transmitted to the input of the comparator circuit, providing a suitable signal amplitude for subsequent signal processing.

[0098] This embodiment can effectively amplify the weak signal output by the pressure head position monitoring module, making the signal amplitude suitable for subsequent circuit processing, thereby improving the detectability and processing accuracy of the signal.

[0099] like Figure 3 As shown, in one embodiment of this disclosure, a scrap steel briquetting machine monitoring system further includes:

[0100] Temperature sensor, second amplifier circuit, multi-channel AD conversion chip, main control chip and multiplexer.

[0101] The output of the temperature sensor is connected to the input of the second amplifier circuit. The temperature sensor is configured to monitor the temperature of the scrap briquetting machine.

[0102] The output of the second amplifier circuit is connected to the input of the multi-channel AD converter chip, and the output of the multi-channel AD converter chip is connected to the input of the main control chip.

[0103] The output of the main control chip is connected to the input of the multiplexer, which is used to control the speed of multiple fans.

[0104] In this embodiment, the second amplifier circuit includes:

[0105] The first end of the resistor R13 is connected with the first output end of the temperature sensor, and the first end of the resistor R14 is connected with the second output end of the temperature sensor.

[0106] The first end of the resistor R13 is connected with the first output end of the temperature sensor, and the first end of the resistor R14 is connected with the second output end of the temperature sensor.

[0107] The second end of the resistor R13 is connected with the non-inverting input end of the operational amplifier U5A, and the second end of the resistor R14 is connected with the inverting input end of the operational amplifier U5A. The output end of the operational amplifier U5A is feedback connected with the inverting input end of the operational amplifier U5A through the resistor R11.

[0108] In the embodiment, the temperature sensor is multiple, the number of the second amplification circuit is same as the number of the temperature sensor, and each temperature sensor is connected with one second amplification circuit. The multiple temperature sensors monitor the temperature of different positions of the scrap steel briquetting machine in real time, such as the temperature of the hydraulic system and the temperature of the motor. The multiple temperature sensors convert the temperature information into electrical signals and output. Since the electrical signal output by the temperature sensor is usually weak, it needs to be further processed. According to the characteristics of the operational amplifier, the second amplification circuit amplifies the weak electrical signal output by the temperature sensor, so that the signal amplitude reaches a level suitable for subsequent processing.

[0109] The analog signal amplified by the second amplification circuit is transmitted to the input end of the multi-channel AD conversion chip. The multi-channel AD conversion chip converts the analog signal into a digital signal so that the host chip can process it. The multi-channel AD conversion chip can process multiple channels of signals at the same time, improving the signal processing efficiency of the system. The digital signal output by the multi-channel AD conversion chip is transmitted to the input end of the host chip. The host chip processes the digital signal and determines the temperature state of the scrap steel briquetting machine according to the preset temperature threshold. If the temperature exceeds the threshold, the host chip will generate a corresponding control signal.

[0110] The output end of the host chip is connected with the input end of the multi-way switch. The multi-way switch controls the rotation speed of multiple fans according to the control signal of the host chip. When the temperature is high, the multi-way switch adjusts the fan to run at a high speed to enhance heat dissipation; when the temperature is low, the rotation speed of the fan is reduced to save energy.

[0111] The temperature sensor of the embodiment monitors the temperature in real time, and after being processed by the second amplification circuit and the multi-channel AD conversion chip, the host chip makes decisions based on the temperature, and adjusts the rotation speed of the fan through the multi-way switch. It can prevent the equipment from overheating and damage, prolong the service life of the equipment, ensure the stable operation of the equipment, reduce the performance fluctuation, adjust the rotation speed of the fan as needed, and save energy.

[0112] The above examples are only used to illustrate the technical solutions of the present disclosure, rather than limit them. Although the present disclosure is described in detail with reference to the foregoing examples, those of ordinary skill in the art should understand that they can modify the technical solutions described in the foregoing examples, or make equivalent replacements to some of the technical features. The modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A monitoring system for a scrap steel briquetting machine, characterized in that, include: Indenter position monitoring module and indenter control module; The pressure head position monitoring module is connected to the input terminal of the pressure head control module; The output of the pressure head control module is used to connect to the control terminal of the proportional valve in the hydraulic system of the scrap steel briquetting machine; The pressure head position monitoring module is configured to monitor the position of the pressure head of the scrap steel briquetting machine, and the pressure head control module is configured to control the speed of the pressure head of the scrap steel briquetting machine.

2. The monitoring system for a scrap steel briquetting machine as described in claim 1, characterized in that, The pressure head control module includes: The circuit consists of a first amplifier circuit, a comparator circuit, an integrator circuit, transistor Q1, and an adder circuit. The input terminal of the first amplifier circuit is connected to the pressure head position monitoring module, the output terminal of the first amplifier circuit is connected to the first input terminal of the comparator circuit, and the second input terminal of the comparator circuit is connected to the reference voltage REF1. The output terminal of the comparator circuit is connected to the control terminal of the transistor Q1, the first terminal of the transistor Q1 is connected to the first input terminal of the adder circuit, and the second terminal of the transistor Q1 is connected to the output terminal of the integrator circuit. The second output terminal of the adder circuit is connected to the reference voltage REF2, and the output terminal of the adder circuit is the output terminal of the pressure head control module.

3. The monitoring system for a scrap steel briquetting machine as described in claim 2, characterized in that, Also includes: Potentiometer U4 and resistor R12; The control terminal of potentiometer U4 is connected to the main control chip, the low-end potential terminal of potentiometer U4 is grounded, the sliding potential terminal of potentiometer U4 is connected to the first power supply through the resistor R12, and the sliding potential terminal of potentiometer U4 is the reference voltage REF1.

4. The monitoring system for a scrap steel briquetting machine as described in claim 3, characterized in that, The integrating circuit includes: Resistor R4, resistor R5, op-amp U3A, capacitor C1 and resistor R7; The first end of the resistor R4 is used to receive the reference signal REF3, and the second end of the resistor R4 is connected to the inverting input terminal of the operational amplifier U3A and the first end of the capacitor C1, respectively. The first end of the resistor R5 is used for grounding, and the second end of the resistor R5 is connected to the non-inverting input terminal of the operational amplifier U3A. The output terminal of the operational amplifier U3A is connected to the second terminal of the capacitor C1 and the first terminal of the resistor R7, respectively. The second terminal of the resistor R7 is connected to the emitter of the transistor Q1.

5. The monitoring system for a scrap steel briquetting machine as described in claim 3, characterized in that, The adder circuit includes: Resistor R8, op-amp U3B, resistor R9 and resistor R6; The first end of the resistor R8 is used to receive the reference signal REF2, and the second end of the resistor R8 is connected to the collector of the transistor Q1 and the non-inverting input of the operational amplifier U3B, respectively. The inverting input terminal of the operational amplifier U3B is grounded through the resistor R6, and the output terminal of the operational amplifier U3B is fed back to the inverting input terminal of the operational amplifier U3B through the resistor R9; the output terminal of the operational amplifier U3B is used to connect to the control terminal of the proportional valve in the hydraulic system of the scrap steel briquetting machine.

6. The monitoring system for a scrap steel briquetting machine as described in claim 2, characterized in that, The first amplifier circuit includes: Resistors R1, R2, R3 and operational amplifier U1A; The first end of the resistor R1 is connected to the pressure head position monitoring module, and the second end of the resistor R1 is connected to the non-inverting input terminal of the operational amplifier U1A. The first end of the resistor R2 is grounded, the second end of the resistor R2 is connected to the inverting input of the operational amplifier U1A, the output of the operational amplifier U1A is fed back to the inverting input of the operational amplifier U1A through the resistor R3, and the output of the operational amplifier U1A is connected to the input of the comparator circuit.

7. The monitoring system for a scrap steel briquetting machine as described in claim 1, characterized in that, Also includes: Temperature sensor, second amplifier circuit, multi-channel AD conversion chip, main control chip and multiplexer; The output terminal of the temperature sensor is connected to the input terminal of the second amplifier circuit; the temperature sensor is configured to monitor the temperature of the scrap steel briquetting machine. The output terminal of the second amplifier circuit is connected to the input terminal of the multi-channel AD conversion chip, and the output terminal of the multi-channel AD conversion chip is connected to the input terminal of the main control chip. The output terminal of the main control chip is connected to the input terminal of the multiplexer, which is used to control the speed of multiple fans.

8. The monitoring system for a scrap steel briquetting machine as described in claim 7, characterized in that, The second amplifier circuit includes: Resistors R13, R14, op-amp U5A, and R11; The first end of resistor R13 is connected to the first output end of the temperature sensor, and the first end of resistor R14 is connected to the second output end of the temperature sensor. The second end of resistor R13 is connected to the non-inverting input of operational amplifier U5A, and the second end of resistor R14 is connected to the inverting input of operational amplifier U5A; the output of operational amplifier U5A is fed back to the inverting input of operational amplifier U5A through resistor R11.

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