CN206489215U - A kind of voltage collecting device - Google Patents
A kind of voltage collecting device Download PDFInfo
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- CN206489215U CN206489215U CN201720192355.4U CN201720192355U CN206489215U CN 206489215 U CN206489215 U CN 206489215U CN 201720192355 U CN201720192355 U CN 201720192355U CN 206489215 U CN206489215 U CN 206489215U
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Abstract
The utility model discloses a kind of voltage collecting device.The voltage collecting device is provided with protection location, difference unit, main control unit, Alarm Unit and power subsystem；The input of protection location accesses the voltage of voltage sample point, and the output end of protection location is connected with the input of difference unit；The output end of difference unit is connected with the input of data sampling unit, to generate differentiated sampled data；The output end of data sampling unit is connected with the data input pin of main control unit, and sampled data is output into main control unit is handled；First control end of main control unit is connected with the controlled end of Alarm Unit；First power output end of power subsystem is connected with the power input of difference unit, and the second source output end of power subsystem is connected with the power input of main control unit；The program can improve the input impedance of detection input, and can to avoid tested voltage be after partial pressure and causes detection inaccurate, can realize the self-defined setting to sample rate.
Description
Technical field
The utility model is related to electronic circuit technology field, more particularly to a kind of voltage collecting device.
Background technology
For various electronic electric equipments, need to detect the index performance of equipment in process of production；In equipment
Running in, in order to ensure the safe and effective operation of equipment, it is necessary to be supervised to the various electric parameters in running
Control, such as voltage.
In the prior art, the mode detected frequently with partial pressure is sampled to voltage, and this sample mode is inputted to height
Impedance is unable to efficiently sampling, and the precision and frequency (being generally 10Hz) sampled are all than relatively low.
Utility model content
The utility model provides a kind of voltage collecting device, and solving in the prior art can not be effective to high input impedance
Sampling, the accuracy and speed of sampling all than it is relatively low the problem of.
To realize above-mentioned design, the utility model uses following technical scheme：
A kind of voltage collecting device, including protection location, difference unit, main control unit, Alarm Unit and power subsystem；
The input of the protection location accesses the voltage of voltage sample point, the output end of the protection location and the difference
The input of subdivision is connected；
The output end of the difference unit is connected with the input of the data sampling unit, and differentiated voltage is defeated
Go out to the data sampling unit and generate sampled data；
The output end of the data sampling unit is connected with the data input pin of the main control unit, by the hits
Handled according to the main control unit is output to；
First control end of the main control unit is connected with the controlled end of the Alarm Unit；
First power output end of the power subsystem is connected with the power input of the difference unit, the power supply list
The second source output end of member is connected with the power input of the main control unit.
Wherein, in addition to communication unit, the data transfer of the data transmission terminal of the communication unit and the main control unit
End is connected；3rd power output end of the power subsystem is connected with the power input of the communication unit.
Wherein, in addition to passage switch unit, multiple inputs of the passage switch unit are respectively connected to described in one
Voltage sample point, the output end of the passage switch unit is connected with the input of the protection location, and the passage switching is single
The controlled end of member is connected with the voltage sample according to control instruction switched conductive with the second control end of the main control unit
Point.
Wherein, the conducting between the input and the output end of the passage switch unit passes through optocoupler control.
Wherein, the protection location includes a piezo-resistance and a self-healing NTC insurance, the piezo-resistance with
The NTC insurances series connection.
Wherein, the model MOV330 of the piezo-resistance.
Wherein, the Alarm Unit includes a node alarm, an external I/O port and a LED warning light.
Wherein, the data sampling unit includes model REF5025 fiducial chip U28, electric capacity C15, operation amplifier
Device U33, resistance R38, resistance R39 and resistance R40；The pin 2 and pin 4 of the fiducial chip U28 respectively with the electric capacity C15
First end be connected with the second end；The pin 6 of the fiducial chip U28 is connected with the first end of the resistance R38, the resistance
38 the second end is connected with the first end of the resistance R39 and operational amplifier U33 pin IN+, and the of the resistance R39
Two ends are connected with the first end of the resistance R40, the second termination simulation ground of the resistance 40.
Wherein, the capacitance of the electric capacity C15 is that 1 μ F, resistance R38 resistance is 100K Ω, the resistance R39's
Resistance is that 20K Ω, the resistance R40 resistance are 20K Ω.
Wherein, the communication unit is the ADM2483 chips with isolation.
The beneficial effects of the utility model are：By setting voltage collecting device, including protection location, difference unit, master
Control unit, Alarm Unit and power subsystem；The input of protection location accesses the voltage of voltage sample point, the output of protection location
End is connected with the input of difference unit；The output end of difference unit is connected with the input of data sampling unit, by difference
Voltage output afterwards generates sampled data to data sampling unit；The output end of data sampling unit and the data of main control unit are defeated
Enter end to be connected, sampled data is output to main control unit and handled；First control end of main control unit and Alarm Unit
Controlled end is connected；First power output end of power subsystem is connected with the power input of difference unit, and the second of power subsystem
Power output end is connected with the power input of main control unit；The program can improve the input impedance of detection input, so
Tested voltage can be avoided to be after partial pressure and cause detection inaccurate, can realize and the self-defined of sample rate is set
Put.
Brief description of the drawings
, below will be to the utility model embodiment in order to illustrate more clearly of the technical scheme in the utility model embodiment
The accompanying drawing used required in description is briefly described, it should be apparent that, drawings in the following description are only that this practicality is new
Some embodiments of type, for those of ordinary skill in the art, on the premise of not paying creative work, can be with root
Other accompanying drawings are obtained according to the content and these accompanying drawings of the utility model embodiment.
Fig. 1 is a kind of block diagram of the voltage collecting device provided in the utility model embodiment；
Fig. 2 is a kind of portion of the data acquisition unit of the voltage collecting device provided in the utility model embodiment
Parallel circuit schematic diagram；
Fig. 3 is that a kind of node of the Alarm Unit of the voltage collecting device provided in the utility model embodiment is accused
Alert output circuit schematic diagram；
Fig. 4 is a kind of opening for the passage switch unit of the voltage collecting device provided in the utility model embodiment
Concern changes circuit theory diagrams.
Embodiment
Further to illustrate that the utility model is to reach technological means and effect that predetermined utility model purpose is taken,
Below in conjunction with accompanying drawing and preferred embodiment, to according to the utility model proposes the embodiment of voltage collecting device, spy
Levy and its effect, describe in detail as after.
It refer to Fig. 1 to Fig. 4, Fig. 1 is a kind of voltage collecting device provided in the utility model embodiment
Block diagram；Fig. 2 is a kind of data acquisition unit of the voltage collecting device provided in the utility model embodiment
Partial circuit schematic diagram；Fig. 3 is a kind of alarm list of the voltage collecting device provided in the utility model embodiment
The output circuit schematic diagram of the node alarm of member；Fig. 4 is a kind of voltage acquisition provided in the utility model embodiment
The switch switching circuit schematic diagram of the passage switch unit of device.As shown in figure 1, the voltage collecting device, including protection location
101st, difference unit 102, main control unit 104, Alarm Unit 106 and power subsystem 105；
The input of protection location 101 accesses the voltage of voltage sample point, the output end and difference unit of protection location 101
102 input is connected；
The output end of difference unit 102 is connected with the input of data sampling unit 103, by differentiated voltage output
Sampled data is generated to data sampling unit 103；
The output end of data sampling unit 103 is connected with the data input pin of main control unit 104, and sampled data is exported
Handled to main control unit 104；
First control end of main control unit 104 is connected with the controlled end of Alarm Unit 106；
First power output end of power subsystem 105 is connected with the power input of difference unit 102, power subsystem 105
Second source output end be connected with the power input of main control unit 104.
In this programme, further comprise communication unit 108, the data transmission terminal and main control unit of communication unit 108
104 data transmission terminal is connected；3rd power output end of power subsystem 105 is connected with the power input of communication unit 108.
Communication unit 108 can select the ADM2483 chips with isolation.
In addition, also including passage switch unit 107, multiple inputs of passage switch unit 107 are respectively connected to an electricity
Press sampled point, the output end of passage switch unit 107 is connected with the input of protection location 101, passage switch unit 107 by
Control end is connected with according to the voltage sample of control instruction switched conductive point with the second control end of main control unit 104.
In this programme, main control unit 104 can be used as main control chip using the MSP430F149 of 16；Difference unit
102 can be using difference of the high-performance difference chip I NA118 as voltage sample input stage；Data sampling unit 103 includes one
Individual reference voltage bleeder circuit, a voltage follower circuit, the simulation numeral of a reference circuit and a high speed 24 turn
Chip is changed, Analog-digital Converter chip model is LTC2440；Voltage collecting device in the present embodiment passes through communication unit 108
Communicated with host computer；Power subsystem 105 uses the DC-DC power source of 3 isolations, and one is power supply that 24V turns 5V
Module, one is power module that positive 5V turns ± 12V, and one is that 5V turns 5V power module.
Protection location 101 is connected with difference unit 102, and difference unit 102 is directly connected with data sampling unit 103, is used
It is acquired in voltage signal, data sampling unit 103 is connected with main control unit 104, the data changed directly is sent back to
Data processing and analysis are carried out to main control unit 104, switch element, Alarm Unit 106 and communication unit 108 are all directly accessed master
Control in unit 104.The purpose of difference is can to improve the input impedance of detection input, can so avoid tested voltage be through
Cross after partial pressure and cause detection inaccurate.Voltage in access system reaches 24 A/D at a high speed after Differential Input, directly
Analog-to-digital chip, the reference voltage that the chip is used when detecting conversion is produced by fiducial chip REF5025P, the core
The reference voltage that piece is produced enters after reference voltage is carried out voltage division processing by resistor voltage divider circuit by an operational amplifier
It is connected after row voltage follow with A/D Analog-digital Converter chips, the conversion speed can be controlled by main control unit 104,
Control to chip conversion speed is realized by the level for the conversion speed controlling switch for changing A/D modulus conversion chips, this time
Design can realize the regulation of 7 kinds of conversion speeds altogether.
Between the specific handoff procedure of passage switch unit 107, the input and output end of passage switch unit 107
Conducting is controlled by optocoupler.
In specific implement, protection location 101 includes a piezo-resistance and a self-healing NTC insurance, pressure-sensitive
Resistance is connected with NTC insurances.The model of piezo-resistance can select MOV330.
NTC (Negative Temperature Coefficient), which refers to have exponent relation with temperature rising resistance, to be subtracted
Thermistor phenomenon small, with negative temperature coefficient and material.In this programme, for example, voltage detecting is carried out to battery, when having
After battery access, the damage of corresponding component is caused in order to prevent high voltage from accessing, now piezo-resistance and NTC insurances is just
It can disconnect in time, the component of protection below is not damaged by high pressure.
To realize various alarm demands, Alarm Unit 106 includes a node alarm, an external I/O port and one
LED warning lights.
Circuit aspect is embodied, as shown in Fig. 2 data sampling unit 103 includes model REF5025 benchmark core
Piece U28, electric capacity C15, operational amplifier U33, resistance R38, resistance R39 and resistance R40；Fiducial chip U28 pin 2 and pin
4 are connected with electric capacity C15 first end and the second end respectively；Fiducial chip U28 pin 6 is connected with resistance R38 first end, electricity
Resistance 38 the second end be connected with resistance R39 first end and operational amplifier U33 pin IN+, resistance R39 the second end and
Resistance R40 first end is connected, and the second termination simulation ground of resistance 40, this partial circuit is mainly used in generating reference voltage.
Reference voltage is mainly produced by fiducial chip REF5025, and the reference voltage of generation passes through resistance R38, resistance R39 and resistance R40
The voltage after partial pressure, partial pressure is carried out after the voltage follower circuit that model OP01 operational amplifier U33 is constituted, is become
0.6V reference voltage, then the reference voltage be directly connected to A/D analog-converted chips TLC2440 reference pin, to A/D
Conversion chip provides the reference voltage of conversion work.
Wherein, electric capacity C15 capacitance is 1 μ F, and resistance R38 resistance is 100K Ω, and resistance R39 resistance is 20K Ω,
Resistance R40 resistance is 20K Ω.
As shown in figure 3, the output circuit of node alarm includes two model AQY212S optocoupler (optocoupler U29 and optocoupler
U32), when detecting electric voltage exception, the driving optocoupler closure of main control unit 104, i.e., K11 is connected with K12, and K21 is connected with K22.
Passage switch unit 107 is defaulted as 12 passages, you can to carry out voltage detecting to 12 voltage sample points simultaneously.Such as
Shown in Fig. 4, two optocouplers constitute the switch of a passage, and an optocoupler connects the positive pole of voltage, and another optocoupler connects voltage
Negative pole, thus, 12 passages are just made up of such 24 optocouplers, and the optocoupler of 12 passages is controlled by main control unit 104, from
And realize the switching of 12 passages.Certainly, optocoupler can access protective resistance (such as resistance R35, resistance R36, resistance R1 and resistance
R2)。
The following is the specific descriptions of the operation principle to voltage collecting device.Brought into operation on voltage collecting device after electricity,
The sampling rate given tacit consent to after being initialized after upper electricity is 55Hz, and collection voltages port number is 12, can now pass through communication unit 108
Real-time monitoring and storage that upper computer software carries out data are connected, while can be carried out by communication unit 108 to device parameter
Set, settable parameter has a setting of device sampling rate, the setting of collection voltages passage and device is calibrated etc..
Device is started working, and fiducial chip produces a reference voltage, and reference voltage passes through operational amplifier again after electric resistance partial pressure
Modulus conversion chip is supplied directly to after progress voltage follow to use as conversion reference voltage, main control unit 104 is directly controlled
Optocoupler carries out the selection of the passage of access system, according to default setting, and the sense channel that device starts is 12, now master control list
Member 104 controls the opening one by one of optocoupler 12 passages of progress, and each passage is controlled by two optocouplers, an optocoupler control
The positive pole of voltage, the negative pole of another optocoupler control voltage, when a passage is opened, other all passages are all
Closed mode, main control unit 104 can monitor all passages in real time, and if there is two passages, device for opening can be carried out simultaneously
LED is alerted, and device is opened after a passage, and device will be entered by accessing the voltage of the passage, first voltage need by
Protection location 101, then carries out voltage differential by difference unit 102, and differentiated voltage enters A/D modulus conversion chips
Input, changed according to the translative mode of current setting, data, which are sent to main control unit 104, after converting enters line number
According to processing, data processing, which is mainly, carries out storage to the data collected to corresponding register, the number of each passage collection
All it is real-time update according to there is fixed register to carry out the data in data storage, and the register, by the number
According to being handled, whether the voltage data is detected beyond the alarming threshold value set, if it exceeds the alarming threshold value of setting, dress
The LED alarm put, node alarm and reserved external I/O mouths can all carry out corresponding alarming processing, mainly be shown as accusing
The red light of warning lamp can be lighted, and node alarm end can be closed, and external I/O mouthful can become high level, high level output to it is corresponding outside
Portion's equipment carries out other necessary controls or record.
It is described above, only it is preferred embodiment of the present utility model, not makees any formal to the utility model
Limitation, although the utility model is disclosed above with preferred embodiment, but is not limited to the utility model, any ripe
Professional and technical personnel is known, is not being departed from the range of technical solutions of the utility model, when in the technology using the disclosure above
Hold the equivalent embodiment made a little change or be modified to equivalent variations, as long as being without departing from technical solutions of the utility model
Hold, any simple modification, equivalent variations and the modification made according to technical spirit of the present utility model to above example, still
Belong in the range of technical solutions of the utility model.
Claims (10)
1. a kind of voltage collecting device, it is characterised in that including protection location, difference unit, main control unit, data sampling list
Member, Alarm Unit and power subsystem；
The input of the protection location accesses the voltage of voltage sample point, the output end of the protection location and the difference list
The input of member is connected；
The output end of the difference unit is connected with the input of the data sampling unit, and differentiated voltage output is arrived
The data sampling unit generates sampled data；
The output end of the data sampling unit is connected with the data input pin of the main control unit, and the sampled data is defeated
Go out to the main control unit and handled；
First control end of the main control unit is connected with the controlled end of the Alarm Unit；
First power output end of the power subsystem is connected with the power input of the difference unit, the power subsystem
Second source output end is connected with the power input of the main control unit.
2. voltage collecting device according to claim 1, it is characterised in that also including communication unit, the communication unit
Data transmission terminal be connected with the data transmission terminal of the main control unit；3rd power output end of the power subsystem with it is described
The power input of communication unit is connected.
3. voltage collecting device according to claim 1, it is characterised in that also including passage switch unit, the passage
Multiple inputs of switch unit are respectively connected to a voltage sample point, the output end of the passage switch unit with it is described
The input of protection location is connected, the controlled end of the passage switch unit be connected with the second control end of the main control unit with
According to the voltage sample point of control instruction switched conductive.
4. voltage collecting device according to claim 3, it is characterised in that the input of the passage switch unit and institute
The conducting stated between output end passes through optocoupler control.
5. voltage collecting device according to claim 1, it is characterised in that the protection location includes a piezo-resistance
With a self-healing NTC insurance, the piezo-resistance is connected with NTC insurances.
6. voltage collecting device according to claim 5, it is characterised in that the model MOV330 of the piezo-resistance.
7. voltage collecting device according to claim 1, it is characterised in that the Alarm Unit includes a node and accused
An alert, external I/O port and a LED warning light.
8. voltage collecting device according to claim 1, it is characterised in that the data sampling unit includes model
REF5025 fiducial chip U28, electric capacity C15, operational amplifier U33, resistance R38, resistance R39 and resistance R40；The benchmark
Chip U28 pin 2 and pin 4 is connected with the first end of the electric capacity C15 and the second end respectively；The fiducial chip U28's
Pin 6 is connected with the first end of the resistance R38, the second end of the resistance 38 and the first end and fortune of the resistance R39
The pin IN+ for calculating amplifier U33 is connected, and the second end of the resistance R39 is connected with the first end of the resistance R40, the electricity
Second termination simulation ground of resistance 40.
9. voltage collecting device according to claim 8, it is characterised in that the capacitance of the electric capacity C15 is 1 μ F, institute
The resistance for stating resistance R38 is that 100K Ω, the resistance R39 resistance are that 20K Ω, resistance R40 resistance is 20K Ω.
10. voltage collecting device according to claim 2, it is characterised in that the communication unit is with isolation
ADM2483 chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720192355.4U CN206489215U (en) | 2017-03-01 | 2017-03-01 | A kind of voltage collecting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720192355.4U CN206489215U (en) | 2017-03-01 | 2017-03-01 | A kind of voltage collecting device |
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| CN206489215U true CN206489215U (en) | 2017-09-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645913A (en) * | 2017-03-01 | 2017-05-10 | 广州锦泊瑞智能设备有限公司 | Voltage acquisition device |
| CN109062743A (en) * | 2018-07-18 | 2018-12-21 | 建荣半导体（深圳）有限公司 | A kind of system and its detection method for realizing SoC chip low pressure real-time detection |
-
2017
- 2017-03-01 CN CN201720192355.4U patent/CN206489215U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645913A (en) * | 2017-03-01 | 2017-05-10 | 广州锦泊瑞智能设备有限公司 | Voltage acquisition device |
| CN109062743A (en) * | 2018-07-18 | 2018-12-21 | 建荣半导体（深圳）有限公司 | A kind of system and its detection method for realizing SoC chip low pressure real-time detection |
| CN109062743B (en) * | 2018-07-18 | 2021-12-28 | 建荣半导体（深圳）有限公司 | System for realizing low-voltage real-time detection of SoC chip and detection method thereof |
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