CN109738593A - Multiple sensor controlable electric current and VOC gas sensor aging device - Google Patents
Multiple sensor controlable electric current and VOC gas sensor aging device Download PDFInfo
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- CN109738593A CN109738593A CN201910155440.7A CN201910155440A CN109738593A CN 109738593 A CN109738593 A CN 109738593A CN 201910155440 A CN201910155440 A CN 201910155440A CN 109738593 A CN109738593 A CN 109738593A
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Abstract
The invention discloses a kind of multiple sensor controlable electric current and VOC gas sensor aging devices.The circuit and device include power module, main control module and N number of sensor selected control module, N=1, and 2,3 ...；The power module provides suitable DC voltage for the main control module and sensor selected control module.The present invention can simultaneously aging multiple sensor；It can be for the parameter optimization per sensor all the way, it may be assumed that different heating voltages can be provided per sensor all the way；While aging sensor, the voltage data of sensor can be monitored.
Description
Technical field
The invention belongs to field of circuit technology, and in particular to a kind of multiple sensor controlable electric current and VOC gas sensor
Aging equipment.
Background technique
Existing sensor aging device design is unreasonable, it is difficult to which batch collects the voltage data of sensor, also can not be simultaneous
Hold the sensor of different electrical characteristics.
1. the number of sensors that existing VOC gas sensor aging device can control is few, poor expandability at most only may be used
To control No. 28 sensors simultaneously.
2. existing VOC gas sensor aging device uses Current Voltage method of testing, it adds for what all the sensors provided
Thermal voltage is consistent, it can not provide different heating voltages for every sensor all the way.
Summary of the invention
In order to overcome above-mentioned problem of the prior art, the present invention provides a kind of multiple sensor controlable electric current and VOC gas
Body sensor aging equipment.
A kind of multiple sensor controlable electric current, including power module, the multiple sensor controlable electric current further comprises:
Main control module and N number of sensor selected control module, N=1,2,3 ...；The power module is that the main control module and sensor select
It controls module and suitable DC voltage is provided.
The main control module includes singlechip minimum system circuit and USB turns TTL circuit, the single-chip minimum system electricity
Voltage measurement pin and sensor the selection pin on road are connected with sensor selected control module.
The sensor selected control module selects 1 analog switch to form by M sensor unit and M；Wherein, M is whole greater than 2
Number.
The sensor unit includes quadrangle pedestal, first resistor, second resistance, first capacitor and the fortune for connecting sensor
Calculate amplifier.
There are four pins, including the first power pins, second source pin, heating pin and measurement to draw for the quadrangle pedestal
Foot；First power pins and second source pin are connected with the supply voltage of power module.
Described first resistor one end is connect with the heating pin, and the other end is connected to ground；The first resistor plays tune
Save the effect of sensor heating voltage.
Described second resistance one end is connect with the positive input pin of the measurement pin and the operational amplifier, the other end
It is connected to ground；
Described first capacitor one end is connected with the positive pole pin of operational amplifier, and the other end is connected to ground；Described
One capacitor plays the role of stable operational amplifier input voltage；
The operational amplifier plays the role of voltage follower, including positive input pin, negative input pin, the first power supply
Positive pin, power cathode pin and the first output pin, positive input pin and the second resistance and the measurement pin phase
Even, negative input pin and the first output pin are connected to form feedback arrangement, the power supply of the first positive pole pin and power module
Voltage is connected, and power cathode pin is connected to the ground, and the first output pin is connected with an input pin of analog switch.
The analog switch includes M input pin, 4 switch control pins, 1 the second output pin, positive pole
Pin and ground pin；The M input pin is connect with M sensor unit respectively, the input pin and main control module
Voltage measurement pin is connected, and 4 switch control pins are connected with 4 sensors of main control module selection pin.
Preferably, the M is 16.
Preferably, the N is 2.
Preferably, the power module is made of reduction voltage circuit, and selection is switching power source chip MP2315, the decompression
The input port of circuit is extraneous 5V DC voltage, and output port provides stable for sensor selected control module and main control module
3.3V DC voltage.
A kind of VOC gas sensor aging device is separately provided, is that above-mentioned multiple sensor controlable electric current is encapsulated as one
The device of body.
A kind of sensor selected control module is also provided, the sensor selected control module selects 1 by M sensor unit and M
Analog switch composition；Wherein, M is the integer greater than 2.
The sensor unit includes quadrangle pedestal, first resistor, second resistance, first capacitor and the fortune for connecting sensor
Calculate amplifier.
There are four pins, including the first power pins, second source pin, heating pin and measurement to draw for the quadrangle pedestal
Foot；First power pins and second source pin are connected with the supply voltage of power module.
Described first resistor one end is connect with the heating pin, and the other end is connected to ground；The first resistor plays tune
Save the effect of sensor heating voltage.
Described second resistance one end is connect with the positive input pin of the measurement pin and the operational amplifier, the other end
It is connected to ground；
Described first capacitor one end is connected with the positive pole pin of operational amplifier, and the other end is connected to ground；Described
One capacitor plays the role of stable operational amplifier input voltage；
The operational amplifier plays the role of voltage follower, including positive input pin, negative input pin, the first power supply
Positive pin, power cathode pin and the first output pin, positive input pin and the second resistance and the measurement pin phase
Even, negative input pin and the first output pin are connected to form feedback arrangement, the power supply of the first positive pole pin and power module
Voltage is connected, and power cathode pin is connected to the ground, and the first output pin is connected with an input pin of analog switch.
The analog switch includes M input pin, 4 switch control pins, 1 the second output pin, positive pole
Pin and ground pin；The M input pin is connect with M sensor unit respectively, the input pin and main control module
Voltage measurement pin is connected, and 4 switch control pins are connected with 4 sensors of main control module selection pin.
Preferably, the M is 16.
Preferably, the N is 2.
The beneficial effects of the present invention are: can simultaneously aging multiple sensor；It can be for the parameter per sensor all the way
Optimization, it may be assumed that different heating voltages can be provided per sensor all the way；While aging sensor, sensing can be monitored
The voltage data of device.
Detailed description of the invention
Fig. 1 multiple sensor controlable electric current structure chart of the present invention.The sensor of Fig. 2 multiple sensor controlable electric current of the present invention
The sensor unit circuitry figure of selected control module.
The analog switching circuit figure of the sensor selected control module of Fig. 3 multiple sensor controlable electric current of the present invention.
The decoupling circuit figure of the sensor selected control module of Fig. 4 multiple sensor controlable electric current of the present invention.
The MCU pin of the main control module of Fig. 5 multiple sensor controlable electric current of the present invention connects circuit diagram.
The CH340G circuit diagram of the main control module of Fig. 6 multiple sensor controlable electric current of the present invention.
The usb circuit figure of the present invention of the main control module of Fig. 7 multiple sensor controlable electric current of the present invention.
The MCU reset circuit figure of the main control module of Fig. 8 multiple sensor controlable electric current of the present invention.
The BOOT selection circuit figure of the main control module of Fig. 9 multiple sensor controlable electric current of the present invention.
The MCU debug circuit figure of the main control module of Figure 10 multiple sensor controlable electric current of the present invention.
The MCU crystal oscillating circuit figure of the main control module of Figure 11 multiple sensor controlable electric current of the present invention.
The MCU power circuit diagram of the main control module of Figure 12 multiple sensor controlable electric current of the present invention.
The MCU decoupling circuit figure of the main control module of Figure 13 multiple sensor controlable electric current of the present invention.
The MP2315 circuit diagram of the power module of Figure 14 multiple sensor controlable electric current of the present invention.
The LED display circuit figure of the power module of Figure 15 multiple sensor controlable electric current of the present invention.
The on/off circuit diagram of the power module of Figure 16 multiple sensor controlable electric current of the present invention.
The AMS1117 circuit diagram of the power module of Figure 17 multiple sensor controlable electric current of the present invention.
The heating voltage of the power module of Figure 18 multiple sensor controlable electric current of the present invention tests circuit diagram.
Specific embodiment
Have choosing below technical solution of the present invention to be further described embodiment.
Please refer to Fig. 1, multiple sensor controlable electric current, comprising: power module, main control module and 2 sensor selected control moulds
Block, the power module provide suitable DC voltage for the main control module and sensor selected control module.
Referring to figure 2. to Fig. 4, the sensor selected control module selects 1 analog switch by 16 sensor units and 16
CD74HC4067SM96 composition.The sensor unit includes the quadrangle pedestal for connecting sensor, first resistor Rh0, the second electricity
Hinder Rs0, first capacitor C0 and operational amplifier Amp0；The quadrangle pedestal there are four pin, including the first power pins RH1,
Second source pin RS1, heating pin RH2 and measurement pin RS2；The first power pins RH1 and second source pin RS1
It is connected with the supply voltage of power module；The one end the first resistor Rh0 is connect with the heating pin RH2, other end connection
To ground；The first resistor Rh0 plays the role of adjusting sensor heating voltage；The one end the second resistance Rs0 and the survey
Amount pin RS2 is connected with the positive input pin of the operational amplifier Amp0, and the other end is connected to ground；The first capacitor C0 mono-
End is connected with the positive pole pin of operational amplifier (LMV321IDBVR) Amp0, and the other end is connected to ground；The first capacitor
C0 plays the role of stable operational amplifier Amp0 input voltage；The operational amplifier Amp0 plays the work of voltage follower
With, including positive input pin, negative input pin, the first positive pole pin, power cathode pin and the first output pin, it is just defeated
Enter pin to be connected with the second resistance Rs0 and the measurement pin RS2, negative input pin is connected to form with the first output pin
Feedback arrangement, the first positive pole pin are connected with the supply voltage of power module, and power cathode pin is connected to the ground, and first is defeated
Pin is connected with an input pin of analog switch out；The analog switch includes 16 input pins, and 4 switch controls are drawn
Foot, 1 the second output pin, positive pole pin and ground pin；16 input pins respectively with 16 sensor units
Connection, the input pin is connected with the voltage measurement pin of main control module, 4 switch control pins and main control module
4 sensor selection pins are connected.
Illustrate: the sensor selected control module of the present embodiment be made of 32 sensor units (but not limited to this, can be 16
Integral multiple).
Each sensor unit has two-way voltage.It is heating voltage all the way, is used for aging (heating) sensor；Another way
It is test voltage.
Heating voltage is provided by bleeder circuit, we can change by adjusting resistance value per sensor unit all the way
Heating voltage.
Test voltage is connected to analog switch by an operational amplifier.The effect of operational amplifier is impedance matching,
It can be compatible with the sensor of different characteristics in this way.
Referring to figure 5. to Figure 13, the main control module includes singlechip minimum system circuit and USB turns TTL circuit, described
Voltage measurement pin and sensor the selection pin of singlechip minimum system circuit are connected with sensor selected control module.
Illustrate: the microcontroller that the main control module of the present embodiment is selected is STM32F103C8T6, it has low-power consumption,
The characteristics of high reliability；
Analog switch chip CD74HC4067SM96.This is the analog switch chip in a 16 channel, it is only necessary to which four are drawn
Foot can control the signal acquisition of No. 16 sensors.This product has used two analog switch chips to control No. 32 sensors
Signal acquisition.The workload of later programmed is greatly reduced in this way；
CH340G is a electrical level transferring chip, can use serial ports and data are sent to the end PC in real time, facilitate subsequent
Data observation and analysis.
Figure 14 to Figure 18 is please referred to, power module is made of reduction voltage circuit and linear voltage-stabilizing circuit.What is selected is switch electricity
Source chip MP2315 and linear regulator chip AMS1117-3.3.The input port of the power module is extraneous 5V direct current
Pressure, output port provide stable 3.3V DC voltage for sensor selected control module and main control module.
Illustrate: the external power supply of the present embodiment is 5V DC power supply.
The present embodiment has a plurality of chips, needs the voltage of stable 3.3V.Therefore, pass through linear regulator chip AMS1117-
3.3 convert 5V voltage to highly stable 3.3V voltage.
The aging of sensor needs 3.3V heating voltage.The requirement of heating voltage is high power.Therefore, pass through Switching Power Supply
5V voltage is converted 3.3V by chip MP2315, it has high power, low-loss feature.
It, can aging No. 32 sensor simultaneously by using the circuit and device of the present embodiment；It can be passed all the way for every
The parameter optimization of sensor, it may be assumed that different heating voltages can be provided per sensor all the way；It, can while aging sensor
To monitor the voltage data of sensor；By the voltage data of analyte sensors, it is known that the superiority and inferiority of the performance of sensor；It is logical
The voltage data of analyte sensors is crossed, we can classify to it for the electrical characteristic of sensor；It can screen in batches
Good sensor realizes the classification of sensor.
The above embodiments are only used to illustrate the present invention, and the simultaneously limitation of non-present invention, the common skill in relation to technical field
Art personnel can make variation and deformation, therefore all equivalent skills without departing from the spirit and scope of the present invention
Art scheme also belongs to scope of the invention.
Claims (8)
1. a kind of multiple sensor controlable electric current, including power module, which is characterized in that the multiple sensor controlable electric current into
One step includes: main control module and N number of sensor selected control module, N=1, and 2,3 ...；The power module is the main control module
Suitable DC voltage is provided with sensor selected control module；
The main control module includes singlechip minimum system circuit and USB turns TTL circuit, the singlechip minimum system circuit
Voltage measurement pin and sensor selection pin are connected with sensor selected control module；
The sensor selected control module selects 1 analog switch to form by M sensor unit and M；Wherein, M is the integer greater than 2；
The sensor unit includes the quadrangle pedestal for connecting sensor, first resistor (Rh0), second resistance (Rs0), the first electricity
Hold (C0) and operational amplifier (Amp0)；
There are four pins, including the first power pins (RH1), second source pin (RS1), heating pin for the quadrangle pedestal
(RH2) and pin (RS2) is measured；The power supply of first power pins (RH1) and second source pin (RS1) and power module
Voltage is connected；
Described first resistor one end (Rh0) is connect with the heating pin (RH2), and the other end is connected to ground；The first resistor
(Rh0) play the role of adjusting sensor heating voltage；
Described second resistance one end (Rs0) and the positive input of measurement pin (RS2) and the operational amplifier (Amp0) are drawn
Foot connection, the other end are connected to ground；
Described first capacitor one end (C0) is connected with the positive pole pin of operational amplifier (Amp0), and the other end is connected to ground；
The first capacitor (C0) plays the role of stable operational amplifier (Amp0) input voltage；
The operational amplifier (Amp0) plays the role of voltage follower, including positive input pin, negative input pin, the first electricity
Source anode pin, power cathode pin and the first output pin, positive input pin and the second resistance (Rs0) and the measurement
Pin (RS2) is connected, and negative input pin and the first output pin are connected to form feedback arrangement, the first positive pole pin and power supply
The supply voltage of module is connected, and power cathode pin is connected to the ground, an input pin of the first output pin and analog switch
It is connected；
The analog switch includes M input pin, 4 switch control pins, 1 the second output pin, positive pole pin
And ground pin；The M input pin is connect with M sensor unit respectively, the voltage of the input pin and main control module
It measures pin to be connected, 4 switch control pins are connected with 4 sensors of main control module selection pin.
2. multiple sensor controlable electric current according to claim 1, which is characterized in that the M is 16.
3. multiple sensor controlable electric current according to claim 1 or 2, which is characterized in that the N is 2.
4. multiple sensor controlable electric current according to claim 3, which is characterized in that the power module is by reduction voltage circuit
Composition, selection is switching power source chip MP2315, and the input port of the reduction voltage circuit is extraneous 5V DC voltage, output
Port provides stable 3.3V DC voltage for sensor selected control module and main control module.
5. a kind of VOC gas sensor aging device, which is characterized in that be to pass the described in any item multichannels of Claims 1-4
The device that sensor controlable electric current is packaged as a whole.
6. a kind of sensor selected control module, which is characterized in that the sensor selected control module is by M sensor unit and M
1 analog switch is selected to form；Wherein, M is the integer greater than 2；
The sensor unit includes the quadrangle pedestal for connecting sensor, first resistor (Rh0), second resistance (Rs0), the first electricity
Hold (C0) and operational amplifier (Amp0)；
There are four pins, including the first power pins (RH1), second source pin (RS1), heating pin for the quadrangle pedestal
(RH2) and pin (RS2) is measured；The power supply of first power pins (RH1) and second source pin (RS1) and power module
Voltage is connected；
Described first resistor one end (Rh0) is connect with the heating pin (RH2), and the other end is connected to ground；The first resistor
(Rh0) play the role of adjusting sensor heating voltage；
Described second resistance one end (Rs0) and the positive input of measurement pin (RS2) and the operational amplifier (Amp0) are drawn
Foot connection, the other end are connected to ground；
Described first capacitor one end (C0) is connected with the positive pole pin of operational amplifier (Amp0), and the other end is connected to ground；
The first capacitor (C0) plays the role of stable operational amplifier (Amp0) input voltage；
The operational amplifier (Amp0) plays the role of voltage follower, including positive input pin, negative input pin, the first electricity
Source anode pin, power cathode pin and the first output pin, positive input pin and the second resistance (Rs0) and the measurement
Pin (RS2) is connected, and negative input pin and the first output pin are connected to form feedback arrangement, the first positive pole pin and power supply
The supply voltage of module is connected, and power cathode pin is connected to the ground, an input pin of the first output pin and analog switch
It is connected；
The analog switch includes M input pin, 4 switch control pins, 1 the second output pin, positive pole pin
And ground pin；The M input pin is connect with M sensor unit respectively, the voltage of the input pin and main control module
It measures pin to be connected, 4 switch control pins are connected with 4 sensors of main control module selection pin.
7. multiple sensor controlable electric current according to claim 6, which is characterized in that the M is 16.
8. multiple sensor controlable electric current according to claim 6 or 7, which is characterized in that the N is 2.
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| CN201910155440.7A CN109738593A (en) | 2019-03-01 | 2019-03-01 | Multiple sensor controlable electric current and VOC gas sensor aging device |
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| CN201910155440.7A CN109738593A (en) | 2019-03-01 | 2019-03-01 | Multiple sensor controlable electric current and VOC gas sensor aging device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202305000U (en) * | 2011-10-19 | 2012-07-04 | 深圳市杰曼科技有限公司 | Automatic compensation signal acquisition system |
| CN202494915U (en) * | 2012-03-21 | 2012-10-17 | 常州工学院 | Greenhouse environment monitoring system |
| CN107807741A (en) * | 2017-10-16 | 2018-03-16 | 上海交通大学 | A kind of multichannel touch sensor based on TrackPoint and corresponding control method |
| CN108008228A (en) * | 2018-01-31 | 2018-05-08 | 吉林大学 | A kind of chip-Size semiconductor gas sensor aging equipment |
| CN210037739U (en) * | 2019-03-01 | 2020-02-07 | 杭州北芯传感科技有限公司 | Multi-channel sensor controllable circuit, selective control module and VOC gas sensor aging device |
-
2019
- 2019-03-01 CN CN201910155440.7A patent/CN109738593A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202305000U (en) * | 2011-10-19 | 2012-07-04 | 深圳市杰曼科技有限公司 | Automatic compensation signal acquisition system |
| CN202494915U (en) * | 2012-03-21 | 2012-10-17 | 常州工学院 | Greenhouse environment monitoring system |
| CN107807741A (en) * | 2017-10-16 | 2018-03-16 | 上海交通大学 | A kind of multichannel touch sensor based on TrackPoint and corresponding control method |
| CN108008228A (en) * | 2018-01-31 | 2018-05-08 | 吉林大学 | A kind of chip-Size semiconductor gas sensor aging equipment |
| CN210037739U (en) * | 2019-03-01 | 2020-02-07 | 杭州北芯传感科技有限公司 | Multi-channel sensor controllable circuit, selective control module and VOC gas sensor aging device |
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