Intelligent transmitter

Abstract

The utility model discloses an intelligent transmitter, comprising a single-chip microcomputer, the single-chip microcomputer is respectively connected with a DA digital-to-analog conversion module, an AD analog-to-digital conversion module, an input power supply module, a communication module and a display screen, the DA digital-to-analog conversion module and the AD analog-to-digital conversion module are both connected with a plurality of data acquisition terminals, the display screen module is electrically connected with a button module, and the button module is electrically connected with the communication module. And the communication module is connected with the signal output terminal. The utility model is suitable for industrial field signal transmission and acquisition, converts direct voltage, direct current, resistance and temperature (temperature measuring element: PT100 thermal resistor) in a corresponding instrument or sensor into voltage and current signal output for remote transmission or control according to user needs, is suitable for non-standard transmission application, provides a serial communication interface, and is convenient to use. And reading data acquired by the transmitter through a serial port.

Description

Technical Field

[0001] The utility model relates to the field of electronic devices, in particular to an intelligent transmitter. Background Art

[0002] There are various instruments and sensors in the power system, such as temperature sensors, pressure meters, humidity sensors, etc., which have voltage, current, and resistance output types, and there are also various voltages that need to be monitored. The ranges of these output quantities are also different; at the same time, the types and ranges of signals that can be accepted by the devices that collect these signals and transmit them to the remote end are also various. A device is needed to convert these instrument, sensor signals, and voltage signals into a range that the collection device can accept, and the conversion ratio relationship is adjustable. Therefore, it is urgent to develop an intelligent transmitter for multiple data collection and transmission. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the utility model provides an intelligent transmitter suitable for multiple data collection and transmission.

[0004] In order to achieve the above-mentioned invention object, the technical solution adopted by the utility model is:

[0005] Provided is an intelligent transmitter, which includes a single-chip microcomputer, which is respectively connected to a DA digital-to-analog conversion module, an AD analog-to-digital conversion module, an input power module, a communication module and a display screen, the DA digital-to-analog conversion module and the AD analog-to-digital conversion module are both connected to a number of data acquisition terminals, the display screen module is electrically connected to a key module, and the communication module is connected to a signal output terminal;

[0006] The input power module includes a power module U5, a capacitor C15 is connected between the AC positive pin AC-L and the AC negative pin AC-L of the power module U5, a capacitor C14 and a capacitor C16 are connected in series between the capacitor C15 and the power module U5, a potentiometer RV1 is connected in parallel at both ends of the capacitor C15, and both ends of the potentiometer RV1 are connected to the AC power supply; a diode D6, a capacitor C1 and a capacitor C6 are connected in parallel to the DC positive pin +Vo and the DC negative pin -Vo of the power module U5.

[0007] Furthermore, the DA digital-to-analog conversion module includes a DA digital-to-analog conversion chip, and the DA digital-to-analog conversion chip is connected to three digital isolators, and the three digital isolators are respectively connected to a number of data acquisition terminals.

[0008] Furthermore, the AD analog-to-digital conversion module includes an AD analog-to-digital conversion chip, and two voltage stabilizing circuits are connected to the AD analog-to-digital conversion chip. The voltage stabilizing circuit includes two parallel voltage stabilizing chips U8 and U9. The voltage stabilizing input terminal VIN of the voltage stabilizing chip U8 and the voltage stabilizing chip U9 are connected to the data acquisition terminal. A capacitor C17 is connected between the voltage stabilizing input terminal VIN of the voltage stabilizing chip U8 and the ground terminal GND. A capacitor C27 is connected between the voltage stabilizing input terminal VIN of the voltage stabilizing chip U9 and the ground terminal GND. The BYP pins of the voltage stabilizing chip U9 and the voltage stabilizing chip U8 are both grounded through capacitor C29.

[0009] Furthermore, the key module includes three key components connected in parallel, the key component includes a switch K, the switch K is connected in parallel with the bidirectional diode NC, and the three key components are connected to the single chip microcomputer through resistors R1, R2 and R3 respectively.

[0010] The beneficial effects of the utility model are as follows: the utility model is suitable for industrial field signal transmission and collection, and converts the DC voltage, DC current, resistance, temperature (temperature measuring element: PT100 thermal resistor) in the corresponding instrument or sensor into voltage and current signal output for remote transmission or control according to user needs. It is suitable for non-standard transmission applications, and provides a serial communication interface to read the data collected by the transmitter through the serial port. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the principle block diagram of the smart transmitter.

[0012] Figure 2 This is the circuit diagram of the button module.

[0013] Figure 3 This is the circuit diagram of the input power module.

[0014] Figure 4 This is the circuit diagram of the AD analog-to-digital conversion module.

[0015] Figure 5 This is the circuit diagram of the DA digital-to-analog conversion module. DETAILED DESCRIPTION

[0016] The specific implementation methods of the utility model are described below to facilitate technical personnel in this technical field to understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific implementation methods. For ordinary technical personnel in this technical field, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all utility model creations using the concept of the utility model are protected.

[0017] like Figure 1As shown, an intelligent transmitter includes a single-chip microcomputer, which uses an STM32F103C8T6 chip for display, button, AD sampling and DA output chip control; the AD chip input sampling value can be set to the DA chip output value, the single-chip microcomputer is respectively connected to the DA digital-to-analog conversion module, the AD analog-to-digital conversion module, the input power module, the communication module and the display screen, the DA digital-to-analog conversion module and the AD analog-to-digital conversion module are both connected to a number of data acquisition terminals, the display screen module is electrically connected to the button module, the communication module is connected to the signal output terminal, and the display screen is used to display the data acquisition and output information of the entire coefficient. The communication module can use an RS485 communication module or an RS232 serial communication module.

[0018] The utility model is suitable for industrial field signal transmission and collection. It can convert the DC voltage, DC current, resistance and temperature (temperature measuring element: PT100 thermal resistor) in the corresponding instrument or sensor into voltage and current signal output for remote transmission or control according to user needs. It is suitable for non-standard transmission applications and provides a serial communication interface to read the data collected by the transmitter through the serial port.

[0019] The input power module includes a power module U5, a capacitor C15 is connected between the AC positive pin AC-L and the AC negative pin AC-L of the power module U5, a capacitor C14 and a capacitor C16 are connected in series between the capacitor C15 and the power module U5, a potentiometer RV1 is connected in parallel at both ends of the capacitor C15, and the two ends of the potentiometer RV1 are connected to the mains; a diode D6, a capacitor C1 and a capacitor C6 are connected in parallel to the DC positive pin +Vo and the DC negative pin -Vo of the power module U5. The power module provides power for the entire system, converts the input AC220V into an output DC±5V, and has the advantages of ultra-wide input voltage range, AC / DC dual-use, low power consumption, low ripple noise, high efficiency, high reliability, and safe isolation.

[0020] In this embodiment, the DA digital-to-analog conversion module includes a DA digital-to-analog conversion chip. The DA digital-to-analog conversion chip uses the AD5412AREZ-REEL7 chip, which is a low-cost, precise, fully integrated, 12-bit digital-to-analog converter with built-in configurable current source and voltage output to meet the needs of industrial process control. The output current range can be set to 4mA-20mA, 0mA-20mA, or over-range 0mA-24mA; the voltage output can be set to 0V-5V, 0V-10V, + / -5V or + / -10V output range; all ranges provide 10% over-range. Three digital isolators are connected to the DA digital-to-analog conversion chip, and the three digital isolators are respectively connected to a number of data acquisition terminals to protect and isolate the mutual influence between the various data acquisition terminals.

[0021] In this embodiment, the AD analog-to-digital conversion module includes an AD analog-to-digital conversion chip. The AD analog-to-digital conversion chip adopts the AD7124-8BCPZ chip, which has a built-in low-noise 24-bit Σ-Δ analog-to-digital converter (ADC) and can be configured to provide 8 differential inputs or 15 single-ended or pseudo-differential inputs; the low noise level inside the chip ensures that small signals can be directly input into the ADC.

[0022] There are two voltage stabilizing circuits connected to the AD analog-to-digital conversion chip, which include two parallel voltage stabilizing chips U8 and U9. The voltage stabilizing input terminals VIN of the voltage stabilizing chips U8 and U9 are connected to the data acquisition terminal. A capacitor C17 is connected between the voltage stabilizing input terminal VIN of the voltage stabilizing chip U8 and the ground terminal GND. A capacitor C27 is connected between the voltage stabilizing input terminal VIN of the voltage stabilizing chip U9 and the ground terminal GND. The BYP pins of the voltage stabilizing chips U9 and U8 are grounded through capacitor C29. It is used to collect resistance (0-500 ohms, can convert temperature (-200℃-850℃)), current (0-25mA), voltage (0-800V); the voltage stabilizing chips U8 and U9 can be used for voltage stabilization of the AD analog-to-digital conversion chip circuit.

[0023] In this embodiment, the key module includes three key components connected in parallel. The key components include a switch K. The switch K is connected in parallel with a bidirectional diode NC. The three key components are connected to the microcontroller through resistors R1, R2 and R3 respectively, and can be used for settings within the display screen.

Claims

1. A smart transmitter, characterized in that: It includes a single-chip microcomputer, which is respectively connected to a DA digital-to-analog conversion module, an AD analog-to-digital conversion module, an input power module, a communication module and a display screen, the DA digital-to-analog conversion module and the AD analog-to-digital conversion module are both connected to a number of data acquisition terminals, the display screen is electrically connected to a key module, and the communication module is connected to a signal output terminal; The input power module includes a power module U5, a capacitor C15 is connected between the AC positive pin AC-L and the AC negative pin AC-L of the power module U5, a capacitor C14 and a capacitor C16 are connected in series between the capacitor C15 and the power module U5, a potentiometer RV1 is connected in parallel at both ends of the capacitor C15, and both ends of the potentiometer RV1 are connected to the AC power supply; a diode D6, a capacitor C1 and a capacitor C6 are connected in parallel to the DC positive pin +Vo and the DC negative pin -Vo of the power module U5.

2. The smart transmitter according to claim 1, characterized in that: The DA digital-to-analog conversion module comprises a DA digital-to-analog conversion chip, and three digital isolators are connected to the DA digital-to-analog conversion chip, and the three digital isolators are respectively connected to a plurality of data acquisition terminals.

3. The smart transmitter according to claim 1, characterized in that: The AD analog-to-digital conversion module includes an AD analog-to-digital conversion chip, and two voltage stabilizing circuits are connected to the AD analog-to-digital conversion chip. The voltage stabilizing circuit includes two parallel voltage stabilizing chips U8 and U9. The voltage stabilizing input terminals VIN of the voltage stabilizing chips U8 and U9 are connected to the data acquisition terminal. A capacitor C17 is connected between the voltage stabilizing input terminal VIN of the voltage stabilizing chip U8 and the ground terminal GND. A capacitor C27 is connected between the voltage stabilizing input terminal VIN of the voltage stabilizing chip U9 and the ground terminal GND. The BYP pins of the voltage stabilizing chips U9 and U8 are both grounded through capacitor C29.

4. The smart transmitter according to claim 1, characterized in that: The key module includes three key components connected in parallel. The key components include a switch K. The switch K is connected in parallel with a bidirectional diode NC. The three key components are connected to the single chip microcomputer through resistors R1, R2 and R3 respectively.

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