Four-path current acquisition module for denture sintering furnace

Abstract

The utility model discloses a four-path current acquisition module for a denture sintering furnace, and belongs to the technical field of sintering furnaces. A four-path current acquisition module for a denture sintering furnace comprises a main control circuit, a power circuit, a communication circuit and a current detection circuit connected with a plurality of heating rods respectively. The main control circuit comprises a main control chip U5 and a monitoring reset chip U6, and pins 12, 13, 14 and 15 of the main control chip U5 are respectively connected to a signal end of one current detection circuit; according to the utility model, the current of the four heating rods is respectively collected, the current of each heating rod is respectively judged in the heating process under the condition that the total current output current is greater than 0A, and if the current of any heating rod is 0A, a heating power supply loop is disconnected through the circuit protection module, and an alarm picture is popped up to indicate the fractured heating rod.

Description

TECHNICAL FIELD

[0001] The utility model relates to sintering furnace technical field especially relates to a 4 way current collection module for false tooth sintering furnace. BACKGROUND

[0002] The heating rod connection mode in the existing false tooth sintering furnace has two kinds of series connection and parallel connection, and the difference between the two kinds of modes is that the temperature error of each heating rod in parallel connection is lower than that in series connection, but the material cost will be increased accordingly, and parallel connection can improve the sintering quality, but has a fatal defect, for example, if one of the heating rods is broken, the total current output by the equipment is shared by the other several rods, resulting in the increase of the power of the other heating rods, which may seriously cause the melting of the furnace and the scrap of the equipment, therefore, the 4 way current collection module is provided, which can monitor the current passing through each heating rod, realize broken rod alarm and prevent the over-temperature failure caused by the increase of the current of single heating rod. SUMMARY

[0003] The utility model discloses a kind of 4 way current collection modules for false tooth sintering furnace, which is proposed to solve the problems in the prior art.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] A 4 way current collection module for false tooth sintering furnace, comprising a main control circuit, a power supply circuit, a communication circuit and a current detection circuit connected with a plurality of heating rods respectively;

[0006] The main control circuit comprises a main control chip U5 and a monitoring reset chip U6, and the 12, 13, 14 and 15 pins of the main control chip U5 are connected to the signal end of one current detection circuit.

[0007] The current detection circuit comprises a first current detection circuit, a second current detection circuit, a third current detection circuit and a fourth current detection circuit, which respectively collect the signals of four heating rods and transmit them to the main control chip U5.

[0008] In some embodiments, the current detection circuit comprises a current transformer and an operational amplifier, and the 1 pin of the current transformer is connected in series with a resistor to a rectification part, and the operational amplifier is electrically connected in the rectification part.

[0009] In some embodiments, the power supply circuit comprises a switching voltage reduction stabilizing chip U1, a low-voltage difference stabilizer U3 and U2, and the power supply circuit is provided with a rectification part.

[0010] In some embodiments, the 4, 5 and 6 pins of the main control chip U5 are connected with the monitoring reset chip U6.

[0011] In some embodiments, the communication circuit is electrically connected to the 9th and 10th pins of the main control chip U5, and the communication circuit comprises a transceiver chip U7.

[0012] In some embodiments, the 1st pin of the main control chip U5 is connected with an indicator lamp LED1.

[0013] Compared with the prior art, the utility model provides a 4 -way current acquisition module for false tooth sintering furnace, has the following beneficial effects.

[0014] 1, the utility model discloses, through the current of four -way heating rod is gathered respectively, in the heating process, in the total current of current output greater than 0A condition, the current of each heating rod is judged respectively, if there is any one heating rod current for 0A, disconnects heating power supply loop through circuit protection module, pops out the alarm picture and marks the broken heating rod.

[0015] 2, the utility model discloses, through the current of each heating rod is gathered in real time, and the state of heating rod is viewed for user, and data is uploaded to touch -sensitive screen.

[0016] Other advantages, objects and features of the utility model will be set forth in the subsequent description to some extent; and to some extent, it will be obvious to those skilled in the art based on the study of the following; or, can be taught from the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is main control circuit diagram for the utility model.

[0018] Figure 2 It is power supply circuit diagram for the utility model.

[0019] Figure 3 It is the first current detection circuit diagram for the utility model.

[0020] Figure 4 It is the second current detection circuit diagram for the utility model.

[0021] Figure 5 It is the third current detection circuit diagram for the utility model.

[0022] Figure 6 It is the fourth current detection circuit diagram for the utility model.

[0023] Figure 7 It is low dropout regulator U2 circuit diagram for the utility model.

[0024] Figure 8 It is the circuit diagram of socket CN2 for the utility model.

[0025] Figure 9The circuit diagram of the socket CN3.

[0026] Figure 10 The communication circuit diagram.

[0027] Figure 11 The circuit diagram of the electrostatic suppressor. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0029] Referring to Figures 1-11 A four-way current acquisition module for a denture sintering furnace, comprising a main control circuit, a power supply circuit, and a current detection circuit connected with a plurality of heating rods respectively;

[0030] The main control circuit 1 comprises a main control chip U5, and the main control chip U5 is an STM32G03F6P6.

[0031] The 12th, 13th, 14th and 15th pins of the main control chip U5 are connected to the signal end of one-way current detection circuit.

[0032] Among them, the current detection circuit comprises: a first current detection circuit, a second current detection circuit, a third current detection circuit and a fourth current detection circuit; signals of four heating rods are acquired respectively and transmitted to the main control chip U5.

[0033] The 1st pin of the main control chip U5 is connected with an indicator lamp LED1.

[0034] The main control circuit acquires signals (AD1~AD4) from the first current detection circuit, the second current detection circuit, the third current detection circuit and the fourth current detection circuit respectively, digitizes and calculates the actual current value; at the same time, the state of the LED1 is controlled.

[0035] The current detection circuit comprises a current transformer ZMCT116A and an operational amplifier LM2904BIDR.

[0036] In the first current detection circuit, the current transformer ZMCT116A is connected in series to the rectification part through the resistor R8.

[0037] In the second current detection circuit, the current transformer ZMCT116A is connected in series to the rectification part through the resistor R17.

[0038] In the third current detection circuit, the current transformer ZMCT116A is connected in series to the rectification part through the resistor R22.

[0039] In the fourth current detection circuit, the current transformer ZMCT116A is connected in series to the rectifier section through resistor R31;

[0040] The LM2904BIDR operational amplifier is connected in series in the rectifier section.

[0041] The ZMCT116A current transformer converts AC current into a small-signal current; sampling resistors R9, R18, R25, and R32 convert the small-signal current into voltage; U4A, U4B, U8A, and U8B amplify the voltage signal for the main control chip to read; diodes D5-D11 protect the operational amplifier from reverse voltage surges; the ZMCT116A detects the passing AC current and outputs a small-signal current proportional to the input current; the sampling resistors convert it into a voltage signal, the operational amplifier further amplifies the signal, and finally it is transmitted to the main control circuit through the AD channel.

[0042] Pins 4, 5, and 6 of the main control chip U5 are connected to the monitoring and reset chip U6.

[0043] The monitoring reset chip U6 uses HG809M3 / TR;

[0044] Pin 6 of the main control chip U5 is RST.

[0045] The system power supply voltage is monitored in real time. When the voltage is lower than the preset reset threshold, a reset signal will be issued quickly to ensure that the main control chip and other key components in the system can start and operate normally under a stable voltage, prevent system failure or data loss caused by abnormal voltage, and ensure stable chip operation.

[0046] Specifically, such as Figure 2 , 7 As shown, the power supply circuit uses a switching buck regulator chip U1, and low dropout regulators U2 and U3; the switching buck regulator chip U1 is XL7005A, the low dropout regulator U3 is AMS1117-5V, and the low dropout regulator U2 is AMS1117-3.3V.

[0047] The power supply circuit includes a rectifier section;

[0048] Multiple pins of the switching buck regulator chip U1 are connected to the rectifier section;

[0049] The low-dropout regulator U2 is connected in series to the rectifier section through rectifier diodes D2 and D3.

[0050] The low-voltage difference stabilizer U3 in the power supply circuit reduces the 24V input to 5V; the low-voltage difference stabilizer U2 further reduces the 5V to 3.3V to supply the main control circuit and other circuits; the diodes D1, D2 and D3 play the roles of reverse connection protection and rectification; the 24V input voltage is switched and reduced by the XL7005A to output a stable 5V voltage; the 5V is further stabilized to 3.3V by the AMS1117 for use of low-voltage circuits.

[0051] Specifically, as shown in Figures 10-11 The 9th and 10th pins of the main control chip U5 are electrically connected with the 485 communication circuit, the 485 communication circuit is electrically connected with the electrostatic suppressor, and the 485 communication circuit comprises a transceiver chip U7.

[0052] The transceiver chip U7 adopts an SP485EEN-L and is connected to the 9th and 10th pins of the main control chip U5.

[0053] The electrostatic suppressor adopts an SM712-02HTG and is connected to the socket CN4.

[0054] The SP485EEN-L in the communication circuit realizes the transmission and reception of the RS485 communication protocol; the SP485EEN-L is responsible for converting the TTL signal of the microcontroller into the RS485 bus signal, which is transmitted to the external device through the terminal resistance matching and wiring terminal.

[0055] Specifically, as shown in Figures 8-9 The 18th and 19th pins of the main control chip U5 are electrically connected with the socket CN2, and the 16th and 17th pins of the main control chip U5 are electrically connected with the socket CN3.

[0056] The socket CN2 is connected with the touch screen, and the socket CN3 is used for burning programs.

[0057] In the utility model, four currents of heating rods are respectively collected through the first current detection circuit, the second current detection circuit, the third current detection circuit and the fourth current detection circuit, in the heating process, the current of each heating rod is judged under the condition that the total current output is greater than 0A, if the current of any heating rod is 0A, the heating power supply loop is disconnected through the circuit protection module, and data is uploaded to the touch screen, an alarm picture is popped out to mark the broken heating rod, and the user can check the state of the heating rod.

[0058] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

[0059] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0060] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A 4-channel current acquisition module for a denture sintering furnace, characterized in that, The main control circuit, the power supply circuit, the communication circuit and the current detection circuit connected with the plurality of heating rods respectively are included; The main control circuit includes a main control chip U5 and a monitoring reset chip U6, and the 12th, 13th, 14th and 15th pins of the main control chip U5 are connected to the signal end of a current detection circuit. The current detection circuit includes a first current detection circuit, a second current detection circuit, a third current detection circuit and a fourth current detection circuit, and the signals of the four heating rods are collected and transmitted to the main control chip U5.

2. The 4-channel current acquisition module for denture sintering furnace according to claim 1, characterized in that, The current detection circuit includes a current transformer and an operational amplifier, and the 1st pin of the current transformer is connected to a rectification part in series with a resistor.

3. The 4-channel current acquisition module for denture sintering furnace according to claim 1, characterized in that, The power supply circuit includes a switching voltage reduction stabilizing chip U1, a low-voltage difference stabilizer U3 and U2, and the power supply circuit is provided with a rectification part.

4. The 4-channel current acquisition module for denture sintering furnace according to claim 1, characterized in that, The 4th, 5th and 6th pins of the main control chip U5 are connected with the monitoring reset chip U6.

5. The 4-channel current acquisition module for denture sintering furnace according to claim 1, characterized in that, The communication circuit is electrically connected to the 9th and 10th pins of the main control chip U5, and the communication circuit includes a transceiver chip U7.

6. The 4-channel current acquisition module for denture sintering furnace according to claim 1, characterized in that, The 1st pin of the main control chip U5 is connected with an indicator lamp.

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