CN103308761B - A kind of bridge motor Instantaneous input power wireless sensing device and measuring method - Google Patents

A kind of bridge motor Instantaneous input power wireless sensing device and measuring method Download PDF

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Publication number
CN103308761B
CN103308761B CN201310200238.4A CN201310200238A CN103308761B CN 103308761 B CN103308761 B CN 103308761B CN 201310200238 A CN201310200238 A CN 201310200238A CN 103308761 B CN103308761 B CN 103308761B
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China
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voltage
signal
phase
radio receiving
receiving transmitting
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CN201310200238.4A
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Chinese (zh)
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CN103308761A (en
Inventor
姜秀柱
徐溪
张凯婷
李向东
原徐成
王亚男
张峰
徐效雷
宋泊明
郭玲玲
原维晨
高娜
康猛
刘显凯
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中国矿业大学
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Abstract

A kind of bridge motor Instantaneous input power wireless sensing device and measuring method, be applicable to crane three-phase AC asynchronous motor and use.Comprise the Hall current sensor be connected with the A phase electrical energy inputs of crane ac three-phase asynchronous motor, the pin M of Hall current sensor respectively with sampling resistor with wireless signal treating apparatus, sampling resistor ground connection, the output terminal of wireless signal treating apparatus is connected with the pin M of Hall voltage sensor, and the input end of Hall voltage sensor is connected across in A, B two-phase of crane three-phase AC asynchronous motor.Its structure is simple, cost is low, safe and reliable, adopt the mode of wireless transmission to carry out data transmitting the various shortcomings effectively can avoiding signal wire transmission, be particularly useful for the on-line determination of the comparatively severe active service bridge motor Instantaneous input power of production environment.

Description

A kind of bridge motor Instantaneous input power wireless sensing device and measuring method
Technical field
The present invention relates to a kind of wireless sensing device, especially a kind of bridge motor Instantaneous input power wireless sensing device and measuring method being applicable to the use of crane three-phase AC asynchronous motor.
Background technology
Hoisting machinery is the fundamental equipments in the development of the national economy, and its motor used is the important plant equipment realizing energy converting between mechanical and change power performances.Along with various countries strengthen the attention to energy saving standard day by day, motor running efficiency is measured more accurately, the particularly efficiency of on-line determination active service bridge motor, reference frame can be provided for rubber tyre gantry crane design, manufacture, transformation and carrying out of applying unit energy conservation, have very important meaning.
At present, both at home and abroad for the universal testing method of the power input of lifting motor, usually just the overall power consumption in motor a period of time is detected, lack the research of kinetic measurement to its transient data and transmission.And for the existing bridge motor input power measurement device come into operation, it is adopt the analog machine such as voltage, current transformer and Displaying Meter mostly, after artificial wiring, operate also record test data by many people simultaneously and just can complete.By the impact that human factor and measuring equipment are brought, usually have the shortcomings such as test error is large, acquisition speed slow, inefficiency, labour intensity are high, data statistics work is complicated with not enough.
Have benefited from the fast development of microelectric technique and Computer Applied Technology in recent years, intelligent power test instrumentation obtains more and more widespread use.Although it can be carried out quasi real time collection, and be processed by data access computing machine by communication interface by voltage, current sensor, the related data such as input voltage, current power of data sampling devices to motor.But on the one hand relative to its price of traditional testing apparatus costly; On the other hand it makes it have the shortcomings such as poor reliability, manual maintenance are loaded down with trivial details to wired transmission of output signal; In addition, the environment for use due to crane is general comparatively severe, and its motor used is mostly bulky, comparatively heavy, more difficultly dismantles, and cannot meet the measuring condition of most intelligent power test instrumentation.
Summary of the invention
For solving above-mentioned prior art and measuring equipment Problems existing, the invention provides a kind of structure simple, without the need to the automation equipment of artificial reading, wireless transmission sampled data, and according to voltage, current sampling data, the instantaneous input general power of bridge motor is calculated, bridge motor Instantaneous input power wireless sensing device and the measuring method of the energy consumption parameter of bridge motor in each stage is provided.
For achieving the above object, bridge motor Instantaneous input power wireless sensing device of the present invention comprises crane three-phase AC asynchronous motor, Hall current sensor, Hall voltage sensor, wireless sending module and main control system, the A phase electrical energy inputs of described crane ac three-phase asynchronous motor is connected with Hall current sensor, and the pin M of Hall current sensor is connected to sampling resistor with wireless signal treating apparatus, sampling resistor ground connection, the output terminal of wireless signal treating apparatus is connected with the pin M of Hall voltage sensor, the input end of Hall voltage sensor is connected across the A of crane three-phase AC asynchronous motor, in B two-phase, described wireless signal treating apparatus comprises radio receiving transmitting module and is connected to two signal processing modules of the radio receiving transmitting module left and right sides, the port AIN1 of radio receiving transmitting module is connected with the output terminal of a signal processing module in left side, the port AIN2 of radio receiving transmitting module is connected with the input end of a signal processing module on right side, described two signal processing modules and radio receiving transmitting module all have pin ground connection, described signal processing module is by germanium diode D1, germanium diode D2, resistance R1 and electric capacity C1 is formed, the positive pole of described germanium diode D1, the negative pole of germanium diode D2, one end and one end of electric capacity C1 of resistance R1 are connected to one point union and are connected with port AIN1 with AIN2 of radio receiving transmitting module, the negative pole of germanium diode D1 is connected with 3.3V power supply, the positive pole of germanium diode D2 and the other end ground connection of electric capacity C1, radio receiving transmitting module and main control system wireless connections.Described radio receiving transmitting module is that RF transceiver CC2530 chip and peripheral basic circuit thereof are formed.
Use a bridge motor Instantaneous input power measuring method for said apparatus, it is characterized in that:
When crane ac three-phase asynchronous motor is started working, Hall current sensor and the Hall voltage sensor instantaneous input voltage that the instantaneous input phase current signal of the A phase of detection ac three-phase asynchronous motor is alternate with A, B two in real time respectively, the output current signal that Hall current sensor detects is through sampling resistor be sent to a signal processing module in left side after converting voltage signal to, after the signal processing module in left side processes this voltage signal, through output terminal, the signal processed be sent to the AIN1 port of radio receiving transmitting module;
The output voltage signal of Hall voltage sensor is directly sent to a signal processing module on right side, after a signal processing module process on right side, through output terminal, the signal processed is inputted the port AIN2 of radio receiving transmitting module, from port AIN1, the signal that port AIN2 inputs completes A/D conversion in radio receiving transmitting module, convert voltage digital signal to wireless signal, main control system is sent to via antenna, main control system receives wireless signal by connected radio receiving transmitting module, the wireless signal received is converted to digital signal and processes by main control system, filter out two voltage sample points simultaneously, and record sampled voltage and the sampling time of sampled point, two sampled points should meet 3 points:
A. identical power cycle is positioned at;
B. two sampled points can not be adjacent, the sampling period of multiple wireless transceiver that needs to be separated by;
C. sampled point can not be upper voltage limit value+3.5V and lower voltage limit value-0.2V;
Main control system is according to the sampled voltage of these two sampled points and sampling time, reduction obtains motor input voltage waveform complete in this cycle, and the instantaneous voltage value obtaining arbitrary time point in this cycle can be inquired about according to this voltage waveform, the Instantaneous input power obtaining bridge motor is calculated according to the instantaneous voltage obtained and instantaneous current value, and then the instantaneous input general power of the three-phase obtaining bridge motor.
Beneficial effect: this device uses Hall current sensor and Hall voltage sensor, can realize double limiting, solve sensor output data more difficult directly by the problem of Direct Sampling by signal processing module to sensor output data; Sampled data sends to main control system process by the mode of wireless transmission, effectively can avoid the various shortcomings of signal wire transmission, process data by the computing power of main control system simultaneously, reaction velocity is fast, be applicable to the on-line determination of the comparatively severe active service bridge motor Instantaneous input power of production environment, its structure is simple, cost is low, safe and reliable, intelligence degree is high.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present invention;
Fig. 2 is signal processing module circuit principle structure figure of the present invention;
The curve synoptic diagram that the voltage data that Fig. 3 transmits for radio receiving transmitting module of the present invention is formed;
In figure: 1-crane three-phase AC asynchronous motor, 2-Hall current sensor, 3-Hall voltage sensor, 4-signal processing module, 5-radio receiving transmitting module.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described further:
As shown in Figure 1, the bridge motor Instantaneous input power wireless sensing device that the embodiment of the present invention provides, comprise crane three-phase AC asynchronous motor 1, Hall current sensor 2, Hall voltage sensor 3, wireless sending module 5 and main control system, described radio receiving transmitting module 5 is that RF transceiver CC2530 chip and peripheral basic circuit thereof are formed.The A phase electrical energy inputs of described crane ac three-phase asynchronous motor 1 is connected with Hall current sensor 2, and the pin M of Hall current sensor 2 is connected to sampling resistor with wireless signal treating apparatus, sampling resistor ground connection, the output terminal of wireless signal treating apparatus is connected with the pin M of Hall voltage sensor 3, the input end of Hall voltage sensor 3 is connected across the A of crane three-phase AC asynchronous motor, in B two-phase, described wireless signal treating apparatus comprises radio receiving transmitting module 5 and is connected to two signal processing modules 4 of radio receiving transmitting module 5 left and right sides, the port AIN1 of radio receiving transmitting module 5 is connected with the output terminal of a signal processing module 4 in left side, the port AIN2 of radio receiving transmitting module 5 is connected with the input end of a signal processing module 4 on right side, described two signal processing modules 4 and radio receiving transmitting module 5 all have pin ground connection, described signal processing module 4 is by germanium diode D1, germanium diode D2, resistance R1 and electric capacity C1 is formed, the positive pole of described germanium diode D1, the negative pole of germanium diode D2, one end and one end of electric capacity C1 of resistance R1 are connected to one point union and are connected with port AIN1 with AIN2 of radio receiving transmitting module 5, the negative pole of germanium diode D1 is connected with 3.3V power supply, the positive pole of germanium diode D2 and the other end ground connection of electric capacity C1, radio receiving transmitting module 5 and main control system wireless connections.
As shown in Figure 2,3.3V power supply, germanium diode D1, germanium diode D2 form diode clamping circuit, because germanium diode forward 0.2V gets final product conducting, so the voltage signal of output can control, between-0.2V to+3.5V, to meet the switch condition of CC2530 chip AD conversion by this clamping circuit; Resistance R1 mono-aspect and electric capacity C1 form low-pass filter circuit, on the other hand also for the electric current flowed out from clamping circuit provides passage.
Use a bridge motor Instantaneous input power measuring method for said apparatus, it is characterized in that:
When crane ac three-phase asynchronous motor 1 is started working, Hall current sensor 2 and Hall voltage sensor 3 instantaneous input voltage that the instantaneous input phase current signal of the A phase of detection ac three-phase asynchronous motor 1 is alternate with A, B two in real time respectively, the output current signal that Hall current sensor 2 detects is through sampling resistor be sent to a signal processing module 4 in left side after converting voltage signal to, after the signal processing module 4 in left side processes this voltage signal, through output terminal, the signal processed be sent to the AIN1 port of radio receiving transmitting module 5;
The output voltage signal of Hall voltage sensor 3 is directly sent to a signal processing module 4 on right side, after a signal processing module 4 on right side processes, through output terminal, the signal processed is inputted the port AIN2 of radio receiving transmitting module 5, from port AIN1, the signal that port AIN2 inputs completes A/D conversion in radio receiving transmitting module 5, convert voltage digital signal to wireless signal, main control system is sent to via antenna, main control system receives wireless signal by connected radio receiving transmitting module, the wireless signal received is converted to digital signal and processes by main control system, filter out two voltage sample points simultaneously, and record sampled voltage and the sampling time of sampled point, two sampled points should meet 3 points:
A. identical power cycle is positioned at;
B. two sampled points can not be adjacent, the sampling period of multiple wireless transceiver that needs to be separated by;
C. sampled point can not be upper voltage limit value+3.5V and lower voltage limit value-0.2V;
Main control system is according to the sampled voltage of these two sampled points and sampling time, reduction obtains motor input voltage waveform complete in this cycle, and the instantaneous voltage value obtaining arbitrary time point in this cycle can be inquired about according to this voltage waveform, the Instantaneous input power obtaining bridge motor is calculated according to the instantaneous voltage obtained and instantaneous current value, and then the instantaneous input general power of the three-phase obtaining bridge motor.
As shown in Figure 3, the voltage waveform that the voltage data for radio receiving transmitting module 5 transmission is formed, in figure: u1 (t1), u1 (t2) are respectively time point t1 and time point t2 moment voltage sample value; Because the sample frequency of RF transceiver is much larger than supply frequency, screening of being not difficult from curve obtains sampled point A, the sampled point B that two meet following three conditions: be positioned at identical power cycle, the some sampling periods and sample voltage value is not+3.5V and-0.2V of being separated by.Meeting the sampled point A of above-mentioned condition, the sample magnitude of sampled point B and sampling time meets following computing formula:
That tries to achieve according to formula I can be used for reducing and obtains motor input voltage waveform complete in this cycle, to obtaining the instantaneous voltage value of arbitrary time point in this cycle.Use method identical with it, the instantaneous current value of point arbitrary detection time can be obtained.
According to computing formula:
Can in the hope of the A phase Instantaneous input power of bridge motor, wherein for the instantaneous input phase voltage of motor A phase, can be calculated by the instantaneous input line voltage that A, B two is alternate and try to achieve, for the instantaneous input phase current of motor A phase.
Use the apparatus and method identical with measuring A phase Instantaneous input power, can obtain the Instantaneous input power of B phase, C phase respectively, the instantaneous input general power of three-phase of bridge motor is the summation of three-phase, that is:
Ⅲ。

Claims (2)

1. a bridge motor Instantaneous input power measuring method, is characterized in that:
When crane ac three-phase asynchronous motor (1) is started working, Hall current sensor (2) and Hall voltage sensor (3) detect the instantaneous input phase current signal of the A phase of ac three-phase asynchronous motor (1) instantaneous input voltage alternate with A, B two respectively in real time, and the output current signal that Hall current sensor (2) detects is through sampling resistor a signal processing module (4) in left side is sent to after converting voltage signal to, left side a signal processing module (4) this voltage signal is processed after, through output terminal, the signal processed is sent to the AIN1 port of radio receiving transmitting module (5);
The output voltage signal of Hall voltage sensor (3) is directly sent to a signal processing module (4) on right side, after signal processing module (4) process on right side, through output terminal, the signal processed is inputted the port AIN2 of radio receiving transmitting module (5), from port AIN1, the signal that port AIN2 inputs completes A/D conversion in radio receiving transmitting module (5), convert voltage digital signal to wireless signal, main control system is sent to via antenna, main control system receives wireless signal by connected radio receiving transmitting module, the wireless signal received is converted to digital signal and processes by main control system, filter out two voltage sample points simultaneously, and record sampled voltage and the sampling time of sampled point, two sampled points should meet following 3 points:
A. identical power cycle is positioned at;
B. two sampled points can not be adjacent, the sampling period of multiple wireless transceiver that needs to be separated by;
C. sampled point can not be upper voltage limit value+3.5V and lower voltage limit value-0.2V;
Main control system is according to the sampled voltage of these two sampled points and sampling time, reduction obtains motor input voltage waveform complete in this cycle, and the instantaneous voltage value obtaining arbitrary time point in this cycle can be inquired about according to this voltage waveform, the Instantaneous input power obtaining bridge motor is calculated according to the instantaneous voltage obtained and instantaneous current value, and then the instantaneous input general power of the three-phase obtaining bridge motor.
2. one kind realizes the bridge motor Instantaneous input power wireless sensing device of method described in claim 1, comprise crane ac three-phase asynchronous motor (1), Hall current sensor (2), Hall voltage sensor (3), wireless receiving and dispatching treating apparatus and main control system, it is characterized in that: the A phase electrical energy inputs of described crane ac three-phase asynchronous motor (1) is connected with Hall current sensor (2), and the pin M of Hall current sensor (2) is connected to sampling resistor with wireless signal treating apparatus, sampling resistor ground connection, the input end of wireless signal treating apparatus is connected with the pin M of Hall voltage sensor (3), the input end of Hall voltage sensor (3) is connected across the A of crane ac three-phase asynchronous motor, in B two-phase, described wireless signal treating apparatus comprises radio receiving transmitting module (5) and is connected to two signal processing modules (4) of radio receiving transmitting module (5) left and right sides, the port AIN1 of radio receiving transmitting module (5) is connected with the output terminal of a signal processing module (4) in left side, the port AIN2 of radio receiving transmitting module (5) is connected with the output terminal of a signal processing module (4) on right side, described two signal processing modules (4) and radio receiving transmitting module (5) all have pin ground connection, described signal processing module (4) is by germanium diode D1, germanium diode D2, resistance R1 and electric capacity C1 is formed, the positive pole of described germanium diode D1, the negative pole of germanium diode D2, one end and one end of electric capacity C1 of resistance R1 are connected to one point union and are connected with port AIN1 with AIN2 of radio receiving transmitting module (5), the negative pole of germanium diode D1 is connected with 3.3V power supply, the positive pole of germanium diode D2 and the other end ground connection of electric capacity C1, radio receiving transmitting module (5) and main control system wireless connections, described radio receiving transmitting module (5) is RF transceiver CC2530 chip and peripheral basic circuit formation thereof.
CN201310200238.4A 2013-05-24 2013-05-24 A kind of bridge motor Instantaneous input power wireless sensing device and measuring method CN103308761B (en)

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CN105954576A (en) * 2016-06-20 2016-09-21 珠海格力节能环保制冷技术研究中心有限公司 Input power calculation circuit of motor

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CN201145585Y (en) * 2007-11-19 2008-11-05 河南索凌电气有限公司 Voltage signal conditioning circuit
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