Three-channel differential pressure acquisition module

Abstract

The utility model belongs to the technical field of differential pressure detection, and discloses a three-channel differential pressure acquisition module, which comprises a differential pressure acquisition circuit, a data processing chip circuit, a main control chip circuit, a communication circuit and a storage circuit, the output end of the data processing chip circuit is connected with the main control chip circuit to process differential pressure data, and the output end of the differential pressure acquisition circuit is connected with the data processing chip circuit to transmit a differential pressure signal to the data processing chip circuit; the differential pressure acquisition circuit is connected with three differential pressure signal acquisition sensors; the main control chip circuit is respectively connected with a communication circuit used for connecting acquired signals with external transmission, a storage circuit used for storage, a key circuit used for parameter setting, and an LED indicating circuit used for working / early warning / alarm prompting. The device is applied to the measurement of the pressure difference of the filter element body of the mechanical oil mist purifier, can detect three groups of pressure difference channels at the same time, and can transmit a detection result to a storage terminal for recording.

Description

Technical Field

[0001] The utility model belongs to the technical field of differential pressure detection, and relates to a three-channel differential pressure acquisition module, and relates to the measurement of differential pressure of a filter core of a mechanical oil mist purifier. Background Art

[0002] Mechanical oil mist purifier uses oil mist filter core to separate the oil mist air discharged from the machine tool, and the purified air meets the standards and is discharged into the air. After the filter core absorbs the oil mist particles, the internal porosity decreases and the air resistance increases. In the past, pointer-type differential pressure gauges were used. Each gauge can only detect one set of cores and has no alarm function. In order to monitor the resistance changes of the filter core and prompt maintenance, it is necessary to develop a multi-channel multi-functional differential pressure acquisition module. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the above-mentioned background technology and provide a three-channel pressure difference acquisition module, which is used for measuring the pressure difference of the filter element of a mechanical oil mist purifier. It can detect three groups of pressure difference channels at the same time, and can transmit the detection results to a storage terminal for recording, and can set pressure difference warnings and alarm prompts.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a three-channel pressure difference acquisition module, including a pressure difference acquisition circuit, a data processing chip circuit, a main control chip circuit, a communication circuit, and a storage circuit; the output end of the data processing chip circuit is connected to the main control chip circuit to realize the processing of pressure difference data, and the output end of the pressure difference acquisition circuit is connected to the data processing chip circuit for transmitting the pressure difference signal to the data processing chip circuit; the data processing chip circuit and the main control chip circuit are respectively connected to the power supply circuit; the pressure difference acquisition circuit is connected to three pressure difference signal acquisition sensors; the main control chip circuit is respectively connected to a communication circuit for connecting the collected signal to the external transmission, a storage circuit for storage, a key circuit for parameter setting, and an LED indication circuit for work / early warning / alarm prompts.

[0005] The main control chip circuit is also connected to an EEPROM circuit for storing and reading data.

[0006] The main control chip circuit is also connected to a SWD download interface for data download.

[0007] The main control chip circuit is also connected to an LCD interface circuit for displaying on an external display screen.

[0008] The main control chip circuit is also connected to a backlight control circuit for displaying the working status of the three pressure difference signal acquisition sensors.

[0009] The main control chip circuit is also connected to a single-chip microcomputer crystal oscillator circuit for controlling the operating rhythm.

[0010] The chip in the main control chip circuit is the STM32 chip.

[0011] The data processing chip circuit is also connected to a digital-to-analog power processing circuit for converting digital signals into circuit signals.

[0012] The data processing chip circuit is also connected to the reference voltage circuit.

[0013] The chip in the data processing chip circuit is the ADS1256 chip.

[0014] The communication circuit is an RS485 communication circuit.

[0015] The power supply circuit includes a 5V voltage stabilizing circuit, which is connected to the power supply terminal and is electrically connected to a power supply board or an external power supply through the power supply terminal.

[0016] The main control chip circuit and the data processing chip circuit are connected to the 5V voltage stabilizing circuit through the LDO circuit respectively.

[0017] The 5V voltage stabilizing circuit is connected to the digital-analog power supply processing circuit.

[0018] EEPROM (Electrically Erasable Programmable Read-Only Memory) is used to store and read data. It is used to read and write configuration parameters such as sensor gain and drift parameters, alarm thresholds of each channel, etc., and can be saved when power is off.

[0019] Furthermore, the range of the differential pressure signal acquisition sensor is 0-1Kpa. The differential pressure signal acquisition sensor is connected to the filter element to be tested through a differential pressure tube to achieve monitoring.

[0020] Furthermore, the power supply terminal is a detachable terminal.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The utility model provides a three-channel pressure difference acquisition module, which is used for measuring the pressure difference of the filter core of a mechanical oil mist purifier. It can detect three groups of pressure difference channels at the same time, and can transmit the detection results to a storage terminal for recording, and can set pressure difference early warning and alarm prompts. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0024] Figure 1 It is a connection diagram of the three-channel pressure difference acquisition module of the utility model.

[0025] Figure 2 It is a STM32 chip circuit diagram of the three-channel pressure difference acquisition module of the utility model.

[0026] Figure 3 It is the ADS1256 chip circuit diagram of the three-channel pressure difference acquisition module of the utility model.

[0027] Figure 4 It is a sensor circuit diagram of a three-channel pressure difference acquisition module of the utility model.

[0028] Figure 5 The utility model discloses a key circuit diagram of a three-channel pressure difference acquisition module.

[0029] Figure 6 The utility model discloses an RS485 communication circuit diagram of a three-channel differential pressure acquisition module.

[0030] Figure 7 The utility model discloses an LCD interface circuit diagram of a three-channel pressure difference acquisition module.

[0031] Figure 8 The utility model discloses an EEPROM circuit diagram of a three-channel pressure difference acquisition module.

[0032] Fig. 9 The utility model discloses a single-chip microcomputer crystal oscillator circuit diagram of a three-channel pressure difference acquisition module.

[0033] Fig.10 The utility model discloses a backlight circuit diagram of a three-channel pressure difference acquisition module.

[0034] Fig.11 The utility model discloses a reference voltage circuit diagram of a three-channel pressure difference acquisition module.

[0035] Fig.12 The utility model discloses an LED indicating circuit diagram of a three-channel pressure difference acquisition module.

[0036] Fig.13 The utility model discloses a 5V voltage stabilizing circuit diagram of a three-channel voltage difference acquisition module.

[0037] Fig.14 The utility model discloses a digital-analog power supply processing circuit diagram of a three-channel pressure difference acquisition module.

[0038] Fig.15 It is an LDO circuit diagram of the three-channel pressure difference acquisition module of the utility model. DETAILED DESCRIPTION

[0039] The following is a further description of the utility model in conjunction with the accompanying drawings of the specification, but the utility model is not limited to the following embodiments. The pressure difference signal acquisition sensor is not limited to a specific model, as long as its working function is achieved. If no specific model is mentioned, it is not limited to a specific model, as long as its working function is achieved.

[0040] Example 1

[0041] A three-channel differential pressure acquisition module comprises a differential pressure acquisition circuit, a data processing chip circuit, a main control chip circuit, a communication circuit and a storage circuit; the output end of the data processing chip circuit is connected to the main control chip circuit to realize the processing of differential pressure data, and the output end of the differential pressure acquisition circuit is connected to the data processing chip circuit for transmitting the differential pressure signal to the data processing chip circuit; the data processing chip circuit and the main control chip circuit are respectively connected to the power supply circuit; the differential pressure acquisition circuit is connected to three differential pressure signal acquisition sensors; the main control chip circuit is respectively connected to a communication circuit for connecting the collected signal to the outside for transmission, a storage circuit for storage, a key circuit for parameter setting, and an LED indication circuit for work / early warning / alarm prompts.

[0042] The main control chip circuit is also connected to an EEPROM circuit for storing and reading data.

[0043] The main control chip circuit is also connected to a SWD download interface for data download.

[0044] The main control chip circuit is also connected to an LCD interface circuit for displaying on an external display screen.

[0045] The main control chip circuit is also connected to a backlight control circuit for displaying the working status of the three pressure difference signal acquisition sensors.

[0046] The main control chip circuit is also connected to a single-chip microcomputer crystal oscillator circuit for controlling the operating rhythm.

[0047] The chip in the main control chip circuit is the STM32 chip.

[0048] The data processing chip circuit is also connected to a digital-to-analog power processing circuit for converting digital signals into circuit signals.

[0049] The data processing chip circuit is also connected to the reference voltage circuit.

[0050] The chip in the data processing chip circuit is the ADS1256 chip.

[0051] The communication circuit is an RS485 communication circuit.

[0052] The power supply circuit includes a 5V voltage stabilizing circuit, which is connected to the power supply terminal and is electrically connected to a power supply board or an external power supply through the power supply terminal.

[0053] The main control chip circuit and the data processing chip circuit are connected to the 5V voltage stabilizing circuit through the LDO circuit respectively.

[0054] The 5V voltage stabilizing circuit is connected to the digital-analog power supply processing circuit.

[0055] EEPROM (Electrically Erasable Programmable Read-Only Memory) is used to store and read data. It is used to read and write configuration parameters such as sensor gain and drift parameters, alarm thresholds of each channel, etc., and can be saved when power is off.

[0056] The range of the differential pressure signal acquisition sensor is 0-1Kpa. The differential pressure signal acquisition sensor is connected to the filter element to be tested through a differential pressure tube to achieve monitoring.

[0057] The power supply terminal is detachable.

[0058] The sensor circuit receives the differential pressure signal through three differential pressure signal acquisition sensors, transmits it to the ADS1256 chip circuit for data processing, and then enters the STM32 chip circuit for further calculation and processing, and finally displays the differential pressure values ​​of the three channels through the LCD circuit display; the 485 communication interface can be connected to external storage, PLC and other devices; the button circuit can perform parameter setting operations; the LED circuit is used for work, early warning, and alarm prompts; the others are power supply and auxiliary circuits.

[0059] The button circuit is equipped with four groups of buttons, namely "+", "-", "return", and "set", which are light-touch micro-switch buttons. By pressing the setting button for 3 seconds, you can enter the setting, and set the "normal", "warning", and "alarm" thresholds of each channel separately, and remember them when power is off.

[0060] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A three-channel pressure difference acquisition module, characterized in that: It includes a pressure difference acquisition circuit, a data processing chip circuit, a main control chip circuit, a communication circuit, and a storage circuit; the output end of the data processing chip circuit is connected to the main control chip circuit to realize the processing of the pressure difference data, and the output end of the pressure difference acquisition circuit is connected to the data processing chip circuit to transmit the pressure difference signal to the data processing chip circuit; the data processing chip circuit and the main control chip circuit are respectively connected to the power supply circuit; The pressure difference acquisition circuit is connected to three pressure difference signal acquisition sensors; the main control chip circuit is respectively connected to a communication circuit for connecting the collected signals to external transmission, a storage circuit for storage, a key circuit for parameter setting, and an LED indication circuit for work / warning / alarm prompts; the pressure difference signal acquisition sensor is connected to the filter element to be tested through a pressure difference tube to achieve monitoring.

2. A three-channel pressure difference acquisition module as claimed in claim 1, characterized in that: The main control chip circuit is also connected to an EEPROM circuit for storing and reading data.

3. A three-channel pressure difference acquisition module as claimed in claim 1, characterized in that: The main control chip circuit is also connected to a SWD download interface for data download.

4. A three-channel pressure difference acquisition module as claimed in claim 1, characterized in that: The main control chip circuit is also connected to an LCD interface circuit for displaying on an external display screen.

5. A three-channel pressure difference acquisition module as claimed in claim 1, characterized in that: The main control chip circuit is also connected to a single-chip microcomputer crystal oscillator circuit for controlling the operating rhythm.

6. A three-channel pressure difference acquisition module as claimed in claim 1, characterized in that: The data processing chip circuit is also connected to a digital-to-analog power processing circuit for converting digital signals into circuit signals.

7. A three-channel pressure difference acquisition module as claimed in claim 1, characterized in that: The power supply circuit includes a voltage stabilizing circuit, which is connected to the power supply terminal and is electrically connected to a power supply board or an external power supply through the power supply terminal.

8. A three-channel pressure difference acquisition module as claimed in claim 7, characterized in that: The power supply terminal is detachable.

9. A three-channel pressure difference acquisition module according to any one of claims 7 to 8, characterized in that: The main control chip circuit and the data processing chip circuit are connected to the voltage stabilizing circuit through the LDO circuit respectively.

10. A three-channel pressure difference acquisition module according to any one of claims 7 to 8, characterized in that: The voltage stabilizing circuit is connected to the digital-analog power supply processing circuit.

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