CN203216525U - Single-channel measuring instrument based on DSP - Google Patents
Single-channel measuring instrument based on DSP Download PDFInfo
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- CN203216525U CN203216525U CN 201320184715 CN201320184715U CN203216525U CN 203216525 U CN203216525 U CN 203216525U CN 201320184715 CN201320184715 CN 201320184715 CN 201320184715 U CN201320184715 U CN 201320184715U CN 203216525 U CN203216525 U CN 203216525U
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Abstract
The utility model discloses a single-channel measuring instrument based on a DSP. The instrument comprises a housing, a liquid crystal screen display window, a power switch, an amplitude measuring button, a battery charging interface and a signal incoming end miniature USB port. The housing is internally provided with a circuit board assembly, a liquid crystal screen and a rechargeable battery. The circuit board assembly comprises a signal acquisition unit, an operation processing unit, a liquid crystal screen display unit and a power supply unit, wherein the operation processing unit is connected with the signal acquisition unit, the liquid crystal screen display unit and the power supply unit respectively. The power supply unit is responsible for supplying power for other units. The single-channel measuring instrument is small in size, can perform high-precision measurement of rotating speed and amplitude on a speed measurement coil signal, employs a rechargeable lithium battery to supply power, achieves portable design, is low in cost and can be used in industrialized application.
Description
Technical field
The invention belongs to and a kind of rotating machinery is carried out the instrument of operational parameter detection, be specifically related to a kind of to rotating machinery detect its amplitude, rotating speed based on the DSP(digital signal processor) the single channel measuring instrument.
Background technology
At present, characteristics such as the instrument that can be used for the rotating machinery amplitude detecting exists that volume is big more, complex structure, cost height and low precision, the sensor that the amplitude signal of analyzing adopts mostly is eddy current sensor, ultrasonic sensor and laser sensor etc., be subject to the high price of sensor, the range of application of this amplitude detecting instrument mostly is testing laboratory, is not suitable for industrial applications.
Summary of the invention
The present invention proposes in order to overcome the shortcoming that exists in the prior art, and its objective is provides a kind of single channel measuring instrument based on DSP that rotating machinery is detected its amplitude, rotating speed.
Technical scheme of the present invention is: a kind of single channel measuring instrument based on DSP, the housing, liquid crystal display display window, power switch, amplitude measurement button, battery charge interface and the signal that comprise instrument insert terminal micro USB mouth, in instrument housing inside circuit board assemblies and liquid crystal display are installed, and rechargeable battery is housed.
Described circuit board assemblies comprises signal gathering unit, operation processing unit, liquid crystal display display unit and power supply unit, wherein, operation processing unit is connected respectively with power supply unit with signal gathering unit, liquid crystal display display unit, and power supply unit is responsible for the power supply of each unit.
Described signal gathering unit comprises level shift circuit, AD chip and CPLD chip, and wherein, the output terminal of level shift circuit is connected with 61,63,64 pins of AD chip respectively, and each pin of all the other of AD chip is connected with the corresponding pin of CPLD chip respectively.
Described operation processing unit comprises AD chip, CPLD chip, cell voltage bleeder circuit, function selection button circuit and dsp chip, wherein, the output terminal of cell voltage bleeder circuit is connected with 42 pins of dsp chip, function selects the output terminal of button circuit to be connected with 24 pins of dsp chip, and each pin of all the other of dsp chip is connected with the corresponding pin of AD chip with the CPLD chip respectively.
Described power supply unit comprises ± the 15V power-switching circuit and ± the 12V power-switching circuit, wherein, the output terminal of ± 15V power-switching circuit is connected with the input end of ± 12V power-switching circuit.
Described liquid crystal display display unit is made up of liquid crystal display and dsp chip, adjustable resistance R23, its annexation is 2 pins, the 20 pin ground connection of liquid crystal display, 1 pin, 19 pins connect the 3.3V power supply, 3 pins of liquid crystal display link to each other with 1 pin of adjustable resistance R23,18 pins of liquid crystal display link to each other with 2 pins of adjustable resistance R23,20 pins of liquid crystal display link to each other with 3 pins of adjustable resistance R23,7,12,27,26 pins of dsp chip link to each other with 14～17 pins of liquid crystal display respectively, and 16～25 pins of dsp chip link to each other with 13～4 pins of liquid crystal display respectively.
The model of described operational amplifier is OPA2227, the model ADS8364 of AD chip, the model of CPLD chip is EPM1270, the model of dsp chip is TI F28335, the model of liquid crystal display is LCM12864D, the model of power supply chip is NCP3063, and the model of I power supply chip is MC7812, and the model of II power supply chip is MC7912.
Volume of the present invention is little, can carry out the high precision detection of rotating speed, amplitude at the velocity coils signal, adopts the chargeable lithium cell power supply, has realized portable design, and cost is lower, can be suitable for industrial applications.
Description of drawings
Fig. 1 is the single channel measuring instrument outside drawing that the present invention is based on DSP;
Fig. 2 is the circuit diagram of circuit board assemblies of the present invention;
Fig. 3 is the circuit diagram of signal gathering unit of the present invention;
Fig. 4 is the circuit diagram of operation processing unit of the present invention;
Fig. 5 is the circuit diagram of liquid crystal display display unit of the present invention;
Fig. 6 is the circuit diagram of power supply unit of the present invention;
Fig. 7 is the program flow diagram of DSP.
Wherein:
1 housing, 2 liquid crystal display display windows
3 power switches, 4 amplitude measurement buttons
5 battery charge interfaces, 6 signals insert terminal micro USB mouth
7 signal gathering unit, 8 operation processing unit
9 liquid crystal display display units, 10 power supply units
11 level shift circuits, 12 operational amplifiers
13 AD chips, 14 CPLD chips
15 cell voltage bleeder circuits, 16 functions are selected button circuit
17 dsp chips, 18 liquid crystal displays
19 power supply chips, 20 ± 15V power-switching circuit
21 ± 12V power-switching circuit, 22 I power supply chips
23 II power supply chips.
Embodiment
Below, with reference to drawings and Examples the single channel dedicated test instrument that the present invention is based on DSP is elaborated:
As shown in Figure 1, a kind of single channel measuring instrument based on DSP comprises that housing 1, liquid crystal display display window 2, power switch 3, amplitude measurement button 4, battery charge interface 5 and the signal of instrument inserts terminal micro USB mouth 6.In instrument housing 1 inside circuit board assemblies and liquid crystal display are installed, and rechargeable battery is housed.
As shown in Figure 2, circuit board assemblies comprises signal gathering unit 7, operation processing unit 8, liquid crystal display display unit 9 and power supply unit 10, wherein, operation processing unit 8 is connected respectively with signal gathering unit 7, liquid crystal display display unit 9 and power supply unit 10, signal gathering unit 7 receives the collection conversion of measured signal, through finally exporting by liquid crystal display display unit 9 after processing unit 8 calculation process.Power supply unit 10 is responsible for the power supply of each unit, and operation processing unit 8 can be by gathering power source voltage value monitoring battery electric weight simultaneously.
As shown in Figure 3, signal gathering unit 7 comprises level shift circuit 11, AD chip 13 and CPLD14 chip, its annexation is: signal input terminal links to each other with 3 pins of operational amplifier 12 by resistance R 32,2 pins of operational amplifier 12 are by resistance R 31 ground connection, 3 pins of operational amplifier 12 link to each other with 7 pins of operational amplifier 12 by resistance R 33,6 of operational amplifier 12,7 pins link to each other, 7 pins of operational amplifier 12 link to each other with 64 pins of AD chip 13 by resistance R 34,1 pin of operational amplifier 12 links to each other 63 of AD chip 13 by resistance R 29 with 63 pins of AD chip 13, between 64 pins and insert capacitor C 89.
27,29,30 pins of AD chip 13 link to each other with 45,111,110 pins of CPLD chip 14 respectively, and 58～51 pins of AD chip 13 link to each other with 137～144 pins of CPLD chip 14 respectively.
Wherein, the model of operational amplifier 12 is OPA2227, the model ADS8364 of AD chip 13, and the model of CPLD chip 14 is EPM1270.
The collection conversion of velocity coils output class sinusoidal signal is responsible for finishing in this unit.
As shown in Figure 4, operation processing unit 8 comprises AD chip 13, CPLD chip 14, cell voltage bleeder circuit 15, function selection button circuit 16 and dsp chip 17, resistance R 40, R41 form cell voltage bleeder circuit 15 in this unit, resistance R 44 and switch SW 0 composition function are selected button circuit 16, its annexation be battery+12V power supply terminal with ground between connect by resistance R 40, R41,42 pins of dsp chip 17 are by resistance R 41 ground connection, and 24 pins of dsp chip 17 are by switch SW 0 ground connection, connect the 3.3V power supply by resistance R 44.7,11,74,19 pins of dsp chip link to each other with 40,42,55,73 pins of CPLD chip 14 respectively, 5 pins of dsp chip 17 link to each other with 28 pins of AD chip 13,136～127 pins of dsp chip 17 link to each other with 33～42 pins of AD chip 13 respectively, 124～122 pins of dsp chip 17 link to each other with 43～45 pins of AD chip 13 respectively, 119 pins of dsp chip 17 link to each other with 46 pins of AD chip 13, and 116,115 pins of dsp chip 17 link to each other with 47,48 pins of AD chip 13 respectively.
Wherein, the model of dsp chip 17 is TI F28335.
This unit is mainly finished and AD is converted back velocity coils signal is carried out tasks such as software filtering, calculation of parameter, measurement function switching, battery electric quantity monitoring.
As shown in Figure 5, liquid crystal display display unit 9 is by liquid crystal display 18 and dsp chip 17, adjustable resistance R23 forms, its annexation is 2 pins of liquid crystal display 18,20 pin ground connection, 1 pin, 19 pins connect the 3.3V power supply, 3 pins of liquid crystal display 18 link to each other with 1 pin of adjustable resistance R23,18 pins of liquid crystal display 18 link to each other with 2 pins of adjustable resistance R23,20 pins of liquid crystal display 18 link to each other with 3 pins of adjustable resistance R23,7 of dsp chip 17,12,27,26 pins link to each other with 14～17 pins of liquid crystal display 18 respectively, and 16～25 pins of dsp chip 17 link to each other with 13～4 pins of liquid crystal display 18 respectively.
Wherein, the model of liquid crystal display 18 is LCM12864D.
Online demonstration and the battery electric quantity Presentation Function of rotating speed, two parameters of amplitude mainly is responsible for finishing in this unit.
As shown in Figure 6, power supply unit 10 comprises ± 15V power-switching circuit 20 and ± 12V power-switching circuit 21, its annexation is+the 12V power supply links to each other with 6 pins of power supply chip 19 by insurance F1,6 pins of power supply chip 19 by capacitor C 89 ground connection, 6 pins by resistance R 19 link to each other with 7 pins, 6 pins by resistance R 20 link to each other with 7 pins, 7 pins by resistance R 18 link to each other with 1 pin, 5 pins pass through that resistance R 22 links to each other with 4 pins, 3 pins pass through that capacitor C 83 links to each other with 4 pins, 7 pins pass through inductance L 4 and link to each other with the anode of diode D2.
The negative electrode of diode D2 connects the anode of diode D3,2 pins of power supply chip 19 connect the anode of diode D4 and 1 pin of triode Q3, the negative electrode of diode D4 connects the G pin of field effect transistor Q2 and 2 pins of triode Q3,2 pins of power supply chip 19 link to each other with 3 pins of triode Q3 by resistance R 21,3 pins of triode Q3 link to each other with the S pin of effect pipe Q2, the D pin of effect pipe Q2 links to each other with the anode of diode D2, the positive pole of the anode of diode D2 and electrochemical capacitor C70, the positive pole of electrochemical capacitor C71 links to each other, the negative pole of the anode of diode D6 and electrochemical capacitor C70, the negative pole of electrochemical capacitor C71, the negative electrode of diode D5 links to each other, the negative electrode of diode D6 links to each other with the anode of diode D5 by capacitor C 85, the S pin of the negative electrode of diode D6 and effect pipe Q2,3 pins of triode Q3 link to each other, 4 pins of the anode of diode D5 and power supply chip 19, the I pin of II power supply chip 23 links to each other, and the negative electrode of diode D3 is by resistance R 24, R25 links to each other with 5 pins of power supply chip 19.
The negative electrode of diode D3 is by capacitor C 80 ground connection, the negative electrode of diode D3 links to each other with the I pin of power supply chip 22, between the I pin of power supply chip 22 and the ground and link electrochemical capacitor C61, C63, the I pin of I power supply chip 22 and the positive pole of electrochemical capacitor C61, the positive pole of electrochemical capacitor C63 links to each other, between the I pin of II power supply chip 23 and the ground and link electrochemical capacitor C72, C75, the I pin of II power supply chip 23 and the negative pole of electrochemical capacitor C72, the negative pole of electrochemical capacitor C75 links to each other, the A pin ground connection of the A pin of I power supply chip 22 and II power supply chip 23, between the O pin of I power supply chip 22 and the ground successively and link capacitor C 68, electrochemical capacitor C60, C65, capacitor C 66, the O pin of I power supply chip 22 and the positive pole of electrochemical capacitor C60, the positive pole of electrochemical capacitor C65 links to each other, between the O pin of II power supply chip 23 and the ground successively and link capacitor C 78, electrochemical capacitor C73, C74, capacitor C 79, the O pin of II power supply chip 23 respectively with electrochemical capacitor C73, the negative pole of C74 links to each other.
The O pin of I power supply chip 22 is+the 12V terminal that the O pin of II power supply chip 23 is-the 12V terminal.
Wherein, the model of power supply chip 19 is NCP3063, and the model of I power supply chip 22 is MC7812, and the model of II power supply chip 23 is MC7912.
Shown in Figure 7, workflow of the present invention may further comprise the steps:
Each unit power supply of system is finished in (ⅰ) start (S1), power supply unit 10;
The FLASH Starting mode of using (ⅱ) loading procedure (S2) from FLASH, dsp chip 17 realizes the self-starting of DSP, and the function program that in this link needs is taken the resource operation is loaded into from FLASH in the internal RAM, improves the operational efficiency of system with this;
(ⅲ) defining variable, function, FFT function space, definition timer, GPIO, PWM, interruption (S3) is set, define various variablees, function, FFT functional transformation control array, the various type matrixes that the definition liquid crystal display shows, define two timers, GPIO direction, numerical value are set, set the PWM frequency, AD is set gathers interruption and timer interruption;
(S4) interrupted in (ⅳ) PWM clock output, AD conversion, enters master routine, data acquisition phase.Open pwm pulse output, open AD and gather interruption, carry out the collection of measured signal.The order that dsp chip 17 sends data acquisition and begins to measure to CPLD chip 14 by 19,74 pins, after CPLD chip 14 control AD chips 13 were finished data acquisition, CPLD chip 14 sent look-at-me to 11 pins of dsp chip 17;
(ⅴ) AD converts (S5), and dsp chip 17 receives after the look-at-me 33-48 information of totally 16 pins by reading AD chip 13, and AD converts;
(ⅵ) test the speed (S6), electric quantity monitoring (S7), the parameter measurement stage, system's function by default that will test the speed according to the actual requirements, amplitude is as selection function.After finishing, data acquisition at first tests the speed and electric quantity monitoring;
(ⅶ) amplitude? (S8), judge through the amplitude function, if then enter amplitude measurement, carry out the demonstration of rotating speed and information about power if not then directly entering the demonstration stage;
(ⅷ) amplitude measurement (S9) need carry out IIR filtering to the measured signal array, the steps such as calculating of FFT windowing, conversion, 1 frequency multiplication and 6 frequencys multiplication;
(ⅸ) show (S10), finish and call the liquid crystal display display subroutine after the measurement of parameter and carry out parameter and show that the process of S5-S10 is carried out in circulation afterwards.
Volume of the present invention is little, and the high precision of the velocity coils signal being carried out rotating speed, amplitude detects, and adopts the chargeable lithium cell power supply, has realized portable design, and cost is low, is suitable for industrial applications.
Claims (3)
1. single channel measuring instrument based on DSP, the housing (1) that comprises instrument, liquid crystal display display window (2), power switch (3), amplitude measurement button (4), battery charge interface (5) and signal insert terminal micro USB mouth (6), in instrument housing (1) inside circuit board assemblies and liquid crystal display are installed, and rechargeable battery is housed, it is characterized in that: described circuit board assemblies comprises signal gathering unit (7), operation processing unit (8), liquid crystal display display unit (9) and power supply unit (10), wherein, operation processing unit (8) and signal gathering unit (7), liquid crystal display display unit (9) is connected respectively with power supply unit (10), and power supply unit (10) is responsible for the power supply of each unit; Described signal gathering unit (7) comprises level shift circuit (11), AD chip (13) and CPLD chip (14), wherein, the output terminal of level shift circuit (11) is connected with 61,63,64 pins of AD chip (13) respectively, and all the other each pin of AD chip (13) are connected with the corresponding pin of CPLD chip (14) respectively; Described operation processing unit (8) comprises AD chip (13), CPLD chip (14), cell voltage bleeder circuit (15), function selection button circuit (16) and dsp chip (17), wherein, the output terminal of cell voltage bleeder circuit (15) is connected with 42 pins of dsp chip (17), function selects the output terminal of button circuit (16) to be connected with 24 pins of dsp chip (17), and all the other each pin of dsp chip (17) are connected with the corresponding pin of AD chip (13) with CPLD chip (14) respectively; Described power supply unit (10) comprises ± 15V power-switching circuit (20) and ± 12V power-switching circuit (21), wherein, the output terminal of ± 15V power-switching circuit (20) is connected with the input end of ± 12V power-switching circuit (21).
2. the single channel measuring instrument based on DSP according to claim 1, it is characterized in that: described liquid crystal display display unit (9) is by liquid crystal display (18) and dsp chip (17), adjustable resistance R23 forms, its annexation is 2 pins of liquid crystal display (18), 20 pin ground connection, 1 pin, 19 pins connect the 3.3V power supply, 3 pins of liquid crystal display (18) link to each other with 1 pin of adjustable resistance R23,18 pins of liquid crystal display (18) link to each other with 2 pins of adjustable resistance R23,20 pins of liquid crystal display (18) link to each other with 3 pins of adjustable resistance R23,7 of dsp chip (17), 12,27,26 pins link to each other with 14～17 pins of liquid crystal display (18) respectively, and 16～25 pins of dsp chip (17) link to each other with 13～4 pins of liquid crystal display (18) respectively.
3. the single channel measuring instrument based on DSP according to claim 1, it is characterized in that: the model of described operational amplifier (12) is OPA2227; The model ADS8364 of AD chip (13); The model of CPLD chip (14) is EPM1270; The model of dsp chip (17) is TI F28335; The model of liquid crystal display (18) is LCM12864D; The model of power supply chip (19) is NCP3063; The model of I power supply chip (22) is MC7812; The model of II power supply chip (23) is MC7912.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320184715 CN203216525U (en) | 2013-04-12 | 2013-04-12 | Single-channel measuring instrument based on DSP |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320184715 CN203216525U (en) | 2013-04-12 | 2013-04-12 | Single-channel measuring instrument based on DSP |
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| CN203216525U true CN203216525U (en) | 2013-09-25 |
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| CN 201320184715 Withdrawn - After Issue CN203216525U (en) | 2013-04-12 | 2013-04-12 | Single-channel measuring instrument based on DSP |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162743A (en) * | 2013-04-12 | 2013-06-19 | 核工业理化工程研究院 | Single-channel detection instrument based on digital signal processor (DSP) |
| CN104849086A (en) * | 2015-06-03 | 2015-08-19 | 核工业理化工程研究院 | DSP-based multi-channel detection instrument |
-
2013
- 2013-04-12 CN CN 201320184715 patent/CN203216525U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162743A (en) * | 2013-04-12 | 2013-06-19 | 核工业理化工程研究院 | Single-channel detection instrument based on digital signal processor (DSP) |
| CN103162743B (en) * | 2013-04-12 | 2015-03-18 | 核工业理化工程研究院 | Single-channel detection instrument based on digital signal processor (DSP) |
| CN104849086A (en) * | 2015-06-03 | 2015-08-19 | 核工业理化工程研究院 | DSP-based multi-channel detection instrument |
| CN104849086B (en) * | 2015-06-03 | 2018-09-14 | 核工业理化工程研究院 | Multi-channel detection instrument based on DSP |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130925 Effective date of abandoning: 20150318 |
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| RGAV | Abandon patent right to avoid regrant |