CN203881830U - Parameter detecting instrument based on Android phone - Google Patents
Parameter detecting instrument based on Android phone Download PDFInfo
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- CN203881830U CN203881830U CN201420303030.5U CN201420303030U CN203881830U CN 203881830 U CN203881830 U CN 203881830U CN 201420303030 U CN201420303030 U CN 201420303030U CN 203881830 U CN203881830 U CN 203881830U
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- analog input
- measurement
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Abstract
The utility model discloses a parameter detecting instrument based on an Android phone. The parameter detecting instrument comprises a measuring module, an analog input interface circuit, a signal conditioning module, a single chip microcomputer internal serial communication module, a single chip microcomputer control circuit, a Bluetooth module circuit, an Android smart phone, and an automatic gear shifting circuit. The measuring module is connected with the analog input interface circuit. The output end of the analog input interface circuit is connected with the signal conditioning module. The signal conditioning module is connected with the single chip microcomputer control circuit. The single chip microcomputer control circuit is connected with the automatic gear shifting circuit. Wireless transmission is carried out between the Bluetooth module circuit and a Bluetooth module of the Android smart phone. Automatic measurement of such parameters as capacitance, inductance, voltage, current and resistance is realized, and remote control and measurement result observation can be performed through the phone.
Description
Technical field
The utility model relates to parameter detecting field, particularly relates to a kind of parameter detecting instrument based on Android mobile phone.
Background technology
At present, more conventional measurement of electric parameter instrument is mechanical type multimeter, although it can comprise voltage by Measurement accuracy, electric current, resistance is at interior many kinds of parameters, but because each measurement all needs manually to change gear, and must carry while measuring, make its portability and interactive performance poor, practicality is also restricted, and likely because gear choosing is wrong, multimeter itself is produced to larger infringement.
Utility model content
In order to overcome the portable and automatic poor deficiency of measurement performance of traditional mechanical type multimeter, the utility model provides a kind of parameter detecting instrument based on Android smart mobile phone.Utilize monolithic microcomputer kernel circuit and many kinds of parameters metering circuit to form bottom metering circuit, measurement data is sent to bluetooth module by serial communication after single-chip microcomputer is processed, the bluetooth of the bluetooth module on single-chip microcomputer and Android smart mobile phone is matched, communication, thus the parameter of measurement is shown on the Android mobile phone that host computer procedure is installed in real time.
The utility model solves the technical scheme that its technical matters adopts: a kind of parameter detecting instrument based on Android mobile phone, it comprises measurement module, analog input interface circuit, signal condition module, the inner serial communication modular of single-chip microcomputer, single chip machine controlling circuit, bluetooth module circuit, Android smart mobile phone, self shifter circuit; It is characterized in that:
Measurement module is connected with analog input interface circuit, the output terminal of analog input interface circuit is connected with signal condition module, signal condition module is connected with single chip machine controlling circuit, single chip machine controlling circuit is connected with self shifter circuit, self shifter circuit is connected with analog input interface circuit, the inner serial communication modular of single-chip microcomputer is connected with bluetooth module circuit, between bluetooth module circuit and the bluetooth module of Android smart mobile phone, carries out wireless transmission.
Measurement module comprises tension measuring circuit, current measurement circuit, and resistance measuring circuit, inductance measurement circuit, capacitance measurement circuit, the output terminal of these circuit is received respectively the input end of corresponding analog input interface circuit.
The beneficial effects of the utility model are: because the parameter detecting instrument of Android mobile phone has added STM32 embedded chip, can measure electrical parameters, and realize the automatic measurement of parameter.Because STM32 has abundant pin, so it can be extended to the more measurement of multiparameter.And utilize mobile phone to carry out Long-distance Control and receive data, making its portability, interactivity and accuracy all strengthen greatly.
Accompanying drawing explanation
Fig. 1 is the application principle figure of the parameter detecting instrument of the utility model based on Android mobile phone;
Fig. 2 is the schematic diagram of described current detection circuit;
Fig. 3 is the schematic diagram of described voltage detecting circuit;
Fig. 4 is the schematic diagram of described resistance detecting circuit;
Fig. 5 is the schematic diagram of described capacitive detection circuit;
Fig. 6 is the schematic diagram of described inductance detection circuit;
Fig. 7 is the serial ports of described hardware module and the schematic diagram of bluetooth communication circuit;
Wherein, 1-tension measuring circuit, 2-current measurement circuit, 3-resistance measuring circuit, 4-inductance measurement circuit, 5-capacitance measurement circuit, 6-measurement module, 7-analog input interface circuit, 8-signal condition module, 10-single chip machine controlling circuit, the inner serial communication modular of 9-single-chip microcomputer, 11-bluetooth module circuit, 12-Android smart mobile phone, 13-self shifter circuit.
Embodiment
Below in conjunction with accompanying drawing, 1-7 is elaborated to the technical solution of the utility model.
As shown in Figure 1, a kind of parameter detecting instrument based on Android mobile phone, it comprises measurement module 6, analog input interface circuit 7, signal condition module 8, the inner serial communication modular 9 of single-chip microcomputer, single chip machine controlling circuit 10, bluetooth module circuit 11, Android smart mobile phone 12, self shifter circuit 13.
Measurement module 6 is connected 7 with analog input interface circuit, the output terminal of analog input interface circuit 7 is connected 8 with signal condition module, signal condition module 8 is connected 10 with single chip machine controlling circuit, single chip machine controlling circuit 10 is connected with self shifter circuit 13, self shifter circuit 13 is connected with analog input interface circuit 7, the inner serial communication modular 9 of single-chip microcomputer is connected with bluetooth module 11, between bluetooth module 11 and the bluetooth module of Android mobile phone 12, realizes data transmission.
The bottom hardware circuit of this parameter detecting instrument be take single-chip microcomputer as core, by single chip control module 10 control survey modules 6, and signal condition module 8 and self shifter circuit 13, thus realize the automatic measurement of parameter.
Wherein, measurement module 6 comprises tension measuring circuit 1, current measurement circuit 2, and resistance measuring circuit 3, inductance measurement circuit 4, capacitance measurement circuit 5, foregoing circuit is received respectively corresponding analog input interface circuit 7.
The ARM-cortexM3 kernel STM32 that single-chip microcomputer uses STMicw Electronics (STMicroelectronics) to produce
As shown in Figure 2, the principle of current measurement circuit 2 be electric current after modulate circuit, through isolation, disturb and to deliver to STM32 and carry out A/D conversion, then deliver to and in STM32, carry out data processing.Data after processing are delivered to serial ports, through Bluetooth communication, are transferred to the upper computer software of Android mobile phone.
Its structure is divided into modulate circuit and metal-oxide-semiconductor ON-OFF control circuit.Wherein, modulate circuit mainly consists of conversion circuit and amplifying circuit.
Conversion circuit adopts powerful sampling resistor (R1, R2, R3, R4, R5), and electric current is changed into voltage, then after the amplification of LM358 (U3) amplifying circuit, delivers in the AD converter of STM32 and carries out AD conversion.
Metal-oxide-semiconductor ON-OFF control circuit is by IRF540 (Q1, Q2, Q3, Q4, Q5) and 74HC238 (U1) form, by STM32, control 74HC238 (U1) code translator and select which mouthful output 5V high level, thereby open corresponding IRF540, the D of each IRF540, the S utmost point meet respectively one end and the GND of sampling resistor.5 IRF540 connect respectively 5 sampling resistors, can realize the automatic switchover of 5 class.
As shown in Figure 3, capacitance measurement circuit 5 has used resistance series connection voltage divider principle, and basic inverting amplifier principle and analog switch switch gear and improve measurement range principle.
Its structure is divided into basic see-saw circuit and self shifter circuit.Basic see-saw circuit is comprised of operational amplifier (LM358) and resistance, and function is for to convert the size of input voltage.
Self shifter circuit is comprised of CD4051 (U1) analog switch and resistance.By switching gear, the attenuation degree of voltage can be changed, thereby the scope of measuring voltage can be improved.Tri-gear selecting positions of ABC are received on the pin of STM32, so just can control with STM32 the switching of gear.
As shown in Figure 4, the principle of resistance measuring circuit 3 is to utilize Closed Circuit Ohm Law ", the voltage that applies 3.3V at sampling resistor and the unknown resistance two ends of series connection, take out the voltage between two resistance, deliver in STM32 built in A/D converter, analog quantity is changed into digital quantity, through the processing of STM32, calculate the size of resistance, through serial ports, bluetooth, be sent on the upper computer software of Android mobile phone and show.
Fluid drive circuit is by 74HC238 (U1) and triode (Q1, Q2, Q3, Q4, Q5, Q6) form, by STM32, control 74HC238 code translator C, B, A and control which mouthful output 5V high level and come driver triode to open, all the other mouthful of output low level controlled 9013 pipes and turn-offed.
In Fig. 5, when the principle of capacitance measurement circuit 5 is capacitor charging, timer output u0=1, during capacitor discharge, u0=0, electric capacity constantly carries out charge and discharge, just output terminal obtains square wave.Multivibrator is inputted without external signal, but can export square wave, its essence is the electric energy that the electric energy of direct current form is become to square wave form.
Hardware circuit mainly consists of 555 multi-resonant oscillating circuits and self shifter circuit, self shifter circuit is enough become by relay, optocoupler, controls optocoupler carry out pilot relay by STM32, realizes the switching between two grades, can survey scope be 1pf-30uf, can survey nonpolar electric capacity.
As shown in Figure 6, the principle of inductance measurement circuit 4 is to use LC oscillatory circuit, access inductance measuring, by the electric capacity being attached thereto, producing LC vibrates, and voltage is input in comparer, finally produce the square wave of standard, use single-chip microcomputer to catch this square wave, obtain its frequency, just can calculate with formula the size of tested inductance.
As shown in Figure 7, bluetooth serial ports communicating circuit is the bridge of bottom hardware circuit and Android mobile communication, and this circuit adopts integrated bluetooth module HC05, and wherein UART_TXD and UART_RXD connect the serial port circuit of single-chip microcomputer, S1 is bluetooth AT designated button, press the button, pilot lamp D1 is bright, and D2 is bluetooth relay indicating light, power on and light, D3 is data communication pilot lamp, and D3 flicker illustrates that bluetooth transmitting data.
This detector has also comprised Android application program, and on the operation of Android application program and Android smart mobile phone, Android smart mobile phone communicates by bluetooth and bottom hardware circuit, and the data of obtaining after bottom single-chip microcomputer is processed are shown in the UI interface designing.
Although the utility model is described in detail in conjunction with the embodiments; but those skilled in the art are with being to be understood that; the utility model is not limited only to specific embodiment; on the contrary; in the various corrections that do not exceed the application's spirit and essence, distortion and replacement all drop among the application's protection domain.
Claims (2)
1. the parameter detecting instrument based on Android mobile phone, it comprises measurement module (6), analog input interface circuit (7), signal condition module (8), the inner serial communication modular (9) of single-chip microcomputer, single chip machine controlling circuit (10), bluetooth module circuit (11), Android smart mobile phone (12), self shifter circuit (13); It is characterized in that:
Measurement module (6) be connected with analog input interface circuit (7), the output terminal of analog input interface circuit (7) be connected with signal condition module (8), signal condition module (8) be connected with single chip machine controlling circuit (10), single chip machine controlling circuit (10) is connected with self shifter circuit (13), self shifter circuit (13) is connected with analog input interface circuit (7), the inner serial communication modular of single-chip microcomputer (9) is connected with bluetooth module circuit (11), between the bluetooth module of bluetooth module circuit (11) and Android smart mobile phone (12), carry out wireless transmission.
2. the parameter detecting instrument based on Android mobile phone according to claim 1, it is characterized in that: measurement module (6) comprises tension measuring circuit (1), current measurement circuit (2), resistance measuring circuit (3), inductance measurement circuit (4), capacitance measurement circuit (5), the output terminal of these circuit is received respectively the input end of corresponding analog input interface circuit (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420303030.5U CN203881830U (en) | 2014-06-09 | 2014-06-09 | Parameter detecting instrument based on Android phone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420303030.5U CN203881830U (en) | 2014-06-09 | 2014-06-09 | Parameter detecting instrument based on Android phone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203881830U true CN203881830U (en) | 2014-10-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420303030.5U Expired - Fee Related CN203881830U (en) | 2014-06-09 | 2014-06-09 | Parameter detecting instrument based on Android phone |
Country Status (1)
| Country | Link |
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| CN (1) | CN203881830U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104965119A (en) * | 2015-06-11 | 2015-10-07 | 双竞科技有限公司 | Wireless multifunctional digital measuring station |
| CN105137252A (en) * | 2015-10-12 | 2015-12-09 | 上海创功通讯技术有限公司 | Measuring device, measuring accessories and measuring method |
| CN105737861A (en) * | 2016-02-01 | 2016-07-06 | 上海交通大学 | Resistive sensor detection circuit |
-
2014
- 2014-06-09 CN CN201420303030.5U patent/CN203881830U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104965119A (en) * | 2015-06-11 | 2015-10-07 | 双竞科技有限公司 | Wireless multifunctional digital measuring station |
| CN105137252A (en) * | 2015-10-12 | 2015-12-09 | 上海创功通讯技术有限公司 | Measuring device, measuring accessories and measuring method |
| CN105137252B (en) * | 2015-10-12 | 2018-09-07 | 上海创功通讯技术有限公司 | Measuring device measures accessory and measurement method |
| CN105737861A (en) * | 2016-02-01 | 2016-07-06 | 上海交通大学 | Resistive sensor detection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141015 Termination date: 20150609 |
|
| EXPY | Termination of patent right or utility model |