CN206311666U - A kind of energy-conservation detector - Google Patents

Abstract

The embodiment of the utility model discloses an energy-saving detector, including a peripheral interface module, a human-computer interaction module, a three-phase voltage and current sampling module, a WIFI communication module and a data analysis module. Compared with the prior art, the embodiment of the utility model The disclosed energy-saving detector is simple to operate, low in cost, and easy to carry; the data form obtained by the energy-saving detector disclosed in the embodiment of the utility model is standardized, which is convenient for wide-scale popularization and use; in addition, through the setting of the WIFI communication module, the host (or Laptop) manages each energy-saving detector at the same time, instead of going to each energy-saving detector to upload and download data separately, so that multiple energy-saving detectors can be used at the same time to measure the power consumption of each measurement point in the internal power distribution system of the enterprise Rapid measurement of the situation can greatly improve the acquisition of energy-saving data and effectively improve the detection efficiency.

Description

An energy saving detector

technical field

The utility model relates to the field of energy-saving detection, in particular to an energy-saving detector.

Background technique

Since the global energy crisis in the 1970s, governments around the world have begun to realize the importance of energy, and many countries have established their own energy-saving policies and audit programs. As a professional auditing activity, energy auditing is an activity in which the auditing unit inspects, checks, analyzes and evaluates the physical and financial processes of energy utilization by enterprises and other energy-consuming units in accordance with relevant national energy-saving regulations and standards.

As a preliminary diagnostic method in energy auditing for the electricity consumption of enterprises and the exploration of energy-saving potential, energy-saving detection can better judge the electricity consumption of enterprises in production, tap the energy-saving potential of enterprises, scientifically and rationally allocate the use of electrical equipment, and improve the efficiency of energy consumption. The power consumption efficiency of electrical equipment, to prevent waste of electricity, especially large-scale power-consuming equipment, through certain testing measures, scientifically and reasonably invested and used, and at the same time paying attention to the goals of power quality and safety, this is for enterprises , is of great significance.

However, the existing energy-saving detection process still has the following deficiencies: (1) The energy-saving detection work is basically done manually, and inspection personnel are required to go to the site to conduct on-site detection of the power consumption of the internal power distribution system of the enterprise. The entire process of obtaining data requires a large number of Manpower and material resources, and time-consuming, high cost, low efficiency; (2) Different ESCOs (Energy Service Company, energy-saving service companies), field testing methods are not standardized, many companies do not strictly follow national standards to implement testing, and the results of testing The data forms are diverse and unconvincing; (3) Although the country has national standards for energy-saving detection technology, energy consumption calculation and energy-saving calculation methods, it still lacks practical and detailed technical standards. Different ESCOs adopt Data collection and energy-saving algorithms (such as taking instantaneous quantity, average value or mean square error, etc.) are not standardized, and the calculation results of energy-saving energy are often questioned, which is very unfavorable for the later development of EPC (Energy Performance Contracting, contract energy management).

Utility model content

The embodiment of the utility model provides an energy-saving detector to solve the problem of low efficiency in obtaining energy-saving detection data in the energy-saving detection process in the prior art, high expenses, and irregular forms of obtained energy-saving detection data, which seriously affect subsequent development. The EPC problem.

In order to solve the above technical problems, the embodiment of the utility model discloses the following technical solutions:

An energy-saving detector, comprising a housing, a peripheral interface module and a human-computer interaction module arranged on the housing, and a WIFI communication module, a three-phase voltage and current sampling module and a data analysis module arranged in the housing, Wherein, the peripheral interface module, human-computer interaction module, three-phase voltage and current sampling module and WIFI communication module are respectively electrically connected to the data analysis module;

The peripheral interface module includes a USB interface, an SD card interface, an RS-232 interface and a power socket electrically connected to the data analysis module respectively;

The three-phase voltage and current sampling module includes a synchronous signal sampling module, a switching control module and a voltage and current acquisition module, a voltage and current sensing module, an instrument amplification module, a signal conditioning module and an ADC signal conversion module electrically connected in sequence, and the synchronous signal The input end of the sampling module is electrically connected to the voltage and current sensing module, the output end is electrically connected to the ADC signal conversion module, the input end of the switching control module is electrically connected to the data analysis module, and the output end is electrically connected to the The instrument amplification module, the input end of the voltage and current acquisition module is electrically connected to the circuit to be detected, and the output end of the ADC signal conversion module is electrically connected to the data analysis module;

The data analysis module includes a DSP signal processing chip, a data buffer module, a FLASH memory and a RAM, and the DSP signal processing chip is respectively connected to the output end of the ADC signal conversion module, the input end of the switching control module and the The data buffer module is electrically connected, and the data buffer module is also electrically connected to the WIFI communication module, the human-computer interaction module, the FLASH memory and the RAM, and the FLASH memory and the RAM are also electrically connected to the USB interface and the SD card respectively. interface, RS-232 interface and power socket;

The human-computer interaction module includes a CPLD logic control module, a display, buttons and a serial communication circuit, and the CPLD logic control module is electrically connected to the data buffer module, the display, buttons and the serial communication circuit respectively.

Preferably, the peripheral interface module further includes a temperature sampling interface, and the temperature sampling interface is electrically connected to the FLASH memory and the RAM, respectively.

Preferably, the DSP signal processing chip is a TMS320F2812 chip or a DSP2812 chip.

Preferably, the CPLD logic control module adopts EPM3256SQC144 chip.

Preferably, the serial communication circuit includes a wired communication circuit supporting RS-232 or RS-485 and a wireless communication circuit supporting GPRS.

It can be seen from the above technical solutions that an energy-saving detector provided by the embodiment of the present invention includes a peripheral interface module, a human-computer interaction module, a three-phase voltage and current sampling module, a WIFI communication module and a data analysis module. Compared with the prior art , the energy-saving detector disclosed in the embodiment of the utility model is simple to operate, low in cost, and easy to carry; the data form obtained by the energy-saving detector disclosed in the embodiment of the utility model is standardized, which is convenient for wide-scale promotion and use; in addition, through the setting of the WIFI communication module , can realize the host (or laptop) to manage each energy-saving detector at the same time, and no longer need to go to each energy-saving detector to download data separately, and can use multiple energy-saving detectors to control the internal power distribution system of the enterprise at the same time Rapid measurement of power consumption at each measurement point can greatly improve the acquisition of energy-saving data and effectively improve detection efficiency.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art In other words, other drawings can also be obtained from these drawings under the premise of not paying creative work.

Fig. 1 is a schematic diagram of the internal structure of an energy-saving detector provided by an embodiment of the present invention.

detailed description

In order to enable those skilled in the art to better understand the technical solution in the utility model, the technical solution in the utility model embodiment will be clearly and completely described below in conjunction with the accompanying drawings in the utility model embodiment. Obviously, The described embodiments are only some of the embodiments of the present utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

Referring to FIG. 1 , it is a schematic diagram of the internal structure of an energy-saving detector provided by an embodiment of the present invention. The embodiment of the utility model discloses an energy-saving detector, which includes a housing, a peripheral interface module and a human-computer interaction module arranged on the housing, a WIFI communication module, a three-phase voltage and current sampling module and a data The analysis module, wherein the peripheral interface module, the human-computer interaction module, the three-phase voltage and current sampling module and the WIFI communication module are respectively electrically connected to the data analysis module, and the housing here can be any socket shape that is easy to hold or place.

The peripheral interface module is arranged on the housing of the energy-saving detector and is used to provide various interfaces to realize data and energy transmission between the energy-saving detector and the outside world. The peripheral interface module includes a USB interface, an SD card interface, an RS-232 interface and a power socket, wherein the USB interface, the SD card interface, the RS-232 interface and the power socket are respectively electrically connected to the data analysis module.

The USB interface mainly realizes the USB read and write functions. For example, the stable management control chip CH376 can be used to read and write files in the USB storage device (such as a U disk). The USB storage device can store a large amount of data. By setting the USB interface, the USB storage device can be used. The device greatly increases the storage capacity of the energy-saving detector, and at the same time enables the energy-saving detector to have the function of pluggable mobile storage.

SD card interface, which mainly realizes the reading and writing function of SD card, which can realize the power data calculated, analyzed and processed in the data analysis module, and store the power data in a certain data format. This interface can also greatly expand the energy saving detection The storage capacity of the instrument enables the energy-saving detector to easily read, write and download power data, and then quickly and effectively process various power data of users.

RS-232 interface makes the energy-saving diagnostic instrument support RS-232 wired communication. The main function of the RS-232 interface is to provide a reliable and flexible interface service between the data circuit terminating equipment (DCE) and the data terminal equipment (DTE), communicate with the data monitoring equipment through the RS-232 interface, and provide transmission measurement data , Real-time monitoring and online monitoring functions.

The power supply socket can be a DC+5V power supply interface, through which a 5V DC power supply can be connected to supply normal power for the entire energy-saving detector to ensure the normal operation of the energy-saving detector.

The three-phase voltage and current sampling module is used for sampling the three-phase voltage signal and the three-phase current signal of the circuit to be detected. The three-phase voltage and current sampling module includes a synchronous signal sampling module, a switching control module, a voltage and current acquisition module, a voltage and current sensing module, an instrument amplification module, a signal conditioning module and an ADC signal conversion module, wherein the voltage and current acquisition module, the voltage and current sensing module The instrument amplification module, the signal conditioning module and the ADC signal conversion module are electrically connected in sequence, the input terminal of the synchronous signal sampling module is electrically connected to the voltage and current sensing module, and the output terminal of the synchronous signal sampling module is electrically connected to the ADC signal conversion module. The input end of the switching control module is electrically connected to the data analysis module, and the output end of the switching control module is electrically connected to the instrument amplification module. The input end of the voltage and current acquisition module is electrically connected to the circuit to be detected, and the output end of the ADC signal conversion module is electrically connected to the data analysis module.

The voltage and current acquisition module mainly includes a three-phase voltage clamp and a three-phase current clamp. By connecting the three-phase voltage clamp and the three-phase current clamp to the circuit to be detected, the three-phase voltage signal and the three-phase current signal in the circuit to be detected can be monitored. sampling.

The voltage and current sensing module uses a voltage and current Hall sensor, such as CLSM-10mA, which has the advantages of linear output, high precision, fast response and strong anti-interference ability, and is used to convert high voltage into low voltage.

The signal conditioning module is mainly composed of a band-pass filter amplifier circuit, an operational amplifier circuit and a signal buffer circuit. Among them, the band-pass filter amplifier circuit generally uses an RLC filter circuit, and the RLC filter circuit has a wide band-pass frequency band, which can effectively filter and process interference signals. , the operational amplifier circuit adopts OPA4227 operational amplifier, and the amplification effect is good. The whole signal conditioning module is used to filter, amplify and buffer the electrical signal from the instrument amplifier module, so that the electrical signal can be accurately and quickly sampled by the ADC signal conversion module.

The synchronous signal sampling module is mainly composed of a zero-crossing detection circuit and a phase-locked loop frequency multiplication circuit. The synchronous signal sampling module first detects the frequency of the circuit to be detected through the zero-crossing detection circuit, and then uses the frequency tracking circuit composed of a phase-locked frequency multiplication circuit to perform synchronous frequency multiplication of 256 times on the frequency of the circuit to be detected, and the obtained frequency multiplied signal As a period control signal for ADC signal conversion, the sampling frequency of 256 points is collected in one power frequency cycle, and it is guaranteed that these 256 points are obtained by sampling at equal intervals synchronously. This synchronous sampling method ensures the real-time and reliability of the measurement data. The phase-locked loop frequency multiplier circuit is composed of CD4046 chip and CD4040 chip. Among them, CD4046 chip is a general-purpose CMOS phase-locked loop integrated circuit, which is composed of a linear voltage-controlled oscillator, 2 phase comparators and a low-pass filter circuit. Through the frequency division function of CD4046 chip and CD4040 chip, the phase-locked loop frequency multiplier circuit can track the pulse voltage signal from the zero-crossing detection circuit in real time. When the frequency of the measured signal changes, the circuit automatically tracks and quickly locks the signal. , always ensure that the sampling frequency is 256 times the frequency of the circuit under test.

The ADC signal conversion module is respectively connected with the signal conditioning module, data analysis module, and synchronous signal sampling module, and converts the voltage signal and current signal processed by the signal conditioning module from analog signal to digital signal, and converts the converted digital signal Send it to the data analysis module for data processing. The ADC signal conversion module is mainly composed of a signal conversion chip and its peripheral circuits. The signal conversion chip here can use the MAX1324 chip, which is a 14-bit high-speed, 8-input channel synchronous sampling ADC converter with excellent dynamic characteristics and DC characteristics. The output signal of the phase-locked loop frequency multiplier circuit is sent to the MAX1324 chip of the ADC signal conversion module to further realize the analog-to-digital conversion of the aforementioned electrical signal.

The switching control module is connected between the data analysis module and the instrument amplification module, and mainly controls the amplification factor of the sampling signal by using the instructions issued by the data analysis module. The switching control module can control the instrument amplifier to switch to the corresponding amplification factor to amplify the signal according to the magnitude of the three-phase voltage signal or three-phase current signal detected by the data analysis module, and realize the switching of the range by changing the gain amplification factor, thereby ensuring Measurement linearity and accuracy of three-phase voltage signals or three-phase current signals of various orders of magnitude.

The input terminal of the instrument amplification module is connected to the switching control module and the voltage and current sensing module, and the output terminal is electrically connected to the band-pass filter circuit of the signal conditioning module. The instrument amplifier module has the characteristics of high precision, low power consumption, high common mode rejection ratio and wide operating frequency band. In this way, the energy-saving detector adopts multi-stage amplification and filtering methods to amplify and filter the three-phase voltage signal and three-phase current signal step by step, which can effectively suppress the influence of interference signals and noise, and improve sampling accuracy and signal-to-noise Compare.

The data analysis module mainly includes DSP signal processing chip, data buffer module, FLASH memory and RAM. Among them, the DSP signal processing chip is electrically connected with the output terminal of the ADC signal conversion module, the input terminal of the switching control module and the data buffer module, and the data buffer module is also connected with the WIFI communication module, human-computer interaction module, FLASH memory and RAM respectively. Electrically connected, the FLASH memory and RAM are also electrically connected to the above-mentioned USB interface, SD card interface, RS-232 interface and power socket.

The data analysis module here mainly realizes three functions: one is to realize the ADC conversion control of the ADC signal sampling module; the other is to realize the magnification switching control of the instrument amplification module by switching the control module; Fast Fourier Transform (FFT) is performed on phase voltage signals and three-phase current signals to obtain various power data useful to users and store the calculated power data in a certain data format. The power data here mainly includes such as fundamental frequency, amplitude and phase of each harmonic, fundamental voltage, current RMS, three-phase active power, reactive power, apparent power, three-phase power factor, three-phase voltage and current distortion rate etc.

The DSP signal processing chip is electrically connected to the output terminal of the above-mentioned ADC signal conversion module, and is used to receive the three-phase voltage digital signal and the three-phase current digital signal output from the ADC signal conversion module, and utilize the fast Fourier transform method to three-phase The voltage digital signal and the three-phase current digital signal are used to calculate the power data such as the voltage effective value, the current effective value, and the harmonic components of each voltage or current. In addition, the DSP signal processing chip here can use TMS320F2812 chip or DSP2812 chip, etc., to realize various power data calculations for three-phase voltage digital signals and three-phase current digital signals.

The above-mentioned DSP signal processing chip is electrically connected to the input terminal of the switching control module, and is used to control the switching control module, so as to realize the switching of voltage and current ranges by changing the gain amplification factor, thereby ensuring the three-phase voltage signals or three-phase voltage signals of various orders of magnitude Measurement linearity and accuracy of current signals.

The data buffer module is electrically connected with the above-mentioned DSP signal processing module, and provides a buffer channel for data storage and exchange processing, making the data storage and exchange more stable and preventing data loss. In addition, the data buffer module is electrically connected to the WIFI communication module, the human-computer interaction module, the FLASH memory and the RAM, and also provides the electrical connection between the above-mentioned DSP signal processing module and the WIFI communication module, the human-computer interaction module, the FLASH memory and the RAM. aisle.

The FLASH memory and the RAM are respectively electrically connected to the data buffer module, the USB interface, the SD card interface, the RS-232 interface and the power socket. The FLASH memory and RAM store the power data in a specific data format, which expands the storage capacity of the energy-saving detector. Among them, FLASH memorizer is mainly used for storing DSP application program. As a non-volatile memory, FLASH memory can store data for a long time without current supply. And because the data that the DSP signal processing chip needs to calculate and analyze is very huge, not to mention completely storing all the data of the circuit to be tested, only the data processed by the DSP signal processing chip, the available space of the on-chip RAM is not enough. Therefore, setting RAM and FLASH memory can completely store data and be read by external devices, making the data transmission between DSP signal processing chip and synchronous signal sampling module, human-computer interaction module and other modules easier and faster.

Further, as a preferred solution provided by the embodiment of the present invention, the above-mentioned peripheral interface module also includes a temperature sampling interface, which is electrically connected to the above-mentioned FLASH memory and RAM respectively, and can be used to collect the temperature of the transformer and the motor, so that In the later stage, energy-saving analysis will be carried out for transformers and motors.

The human-computer interaction module is arranged on the housing, and includes a CPLD logic control module, a display, buttons and a serial communication circuit, wherein the CPLD logic control module is electrically connected to the data buffer module, the display, buttons and the serial communication circuit respectively. Here, the human-computer interaction module mainly uses the CPLD logic control function to enable the display, buttons and serial communication circuit to realize seamless connection with the DSP signal processing chip. The display shows the current measurement parameters, the key realizes manual operation and control of the instrument, and the serial port communication circuit realizes data communication. The function and composition of each module in the human-computer interaction module are introduced as follows:

The CPLD logic control module is mainly composed of a large-scale integrated circuit chip EPM3256SQC144, which is connected with a DSP signal processing chip module through a data buffer module, has 110 I/O ports, and has a fast logic operation speed. This module seamlessly connects the DSP signal processing chip with the serial communication circuit, FLASH memory and RAM, display and button, making the data transmission between the DSP signal processing chip TMS320F2812 or DSP2812 and the above four modules faster , which enhances the anti-interference ability of the system, and also has the advantages of small size, low power consumption, stable performance and convenient design and debugging.

The display is mainly composed of a liquid crystal display module and its peripheral circuits. It is connected with the CPLD logic control module. It can use an LCD12864 liquid crystal display with a full Chinese character library. Energy consumption data can be intuitively displayed on the LCD screen, which is clear and intuitive.

The button is mainly composed of a button trigger circuit, connected with the CPLD logic control module, using the I/O port signal of the DSP signal processing chip to control the operation of the display, and used for manual input to control the energy-saving detector and save related parameter settings.

The serial port communication circuit can mainly use UART chip TL16C550, which supports RS232 or RS485 wired communication circuit and GPRS wireless communication circuit. Reliable and flexible interface services. It communicates with monitoring equipment through RS232 or RS485 interface, providing the functions of transmitting measurement data, real-time monitoring and online monitoring. At the same time, the data communication function can also be realized by the Bluetooth control circuit, so that the measured data can be transmitted wirelessly at a short distance, which improves the detection efficiency and saves detection time.

The WIFI communication module is set in the housing and is electrically connected to the above-mentioned data buffer module, and is used to enable the energy-saving detector to communicate independently with the host, so that the host can quickly obtain user data detected by the energy-saving detector. Usually, power-saving detection requires multiple detection devices to be distributed in different locations for measurement at the same time. The operation of the detection devices in the whole process requires connecting the host computer or notebook to each detection device at each test point to obtain data. After setting up the WIFI communication module, the host computer (and laptop) can form a network with the help of a router, and manage each energy-saving detector through the WIFI network at the same time, without the need to download data from each energy-saving detector separately, which is different from the existing Compared with advanced technology, it can greatly improve the efficiency of data acquisition, which is safe and convenient.

The utility model discloses an energy-saving detector. By setting a peripheral interface module, a human-computer interaction module, a three-phase voltage and current sampling module, a WIFI communication module and a data analysis module, compared with the prior art, the embodiment of the utility model discloses The energy-saving detector is simple to operate, low in cost, and easy to carry; the data format obtained by the energy-saving detector disclosed in the embodiment of the utility model is standardized, which is convenient for wide-scale popularization and use; in addition, through the setting of the WIFI communication module, the host (or notebook Computer) to manage each energy-saving detector at the same time, instead of going to each energy-saving detector to upload and download data separately, so that multiple energy-saving detectors can be used at the same time to measure the power consumption of each measurement point in the internal power distribution system of the enterprise Rapid measurement can greatly improve the acquisition of energy-saving data and effectively improve detection efficiency.

At the same time, the collected standardized power data can be stored in large-capacity FLASH memory and RAM through the data buffer module in the data analysis module. The application of large-capacity storage technology enables the energy-saving diagnostic instrument to continuously store at least one week of online monitoring record data , making the copy of monitoring data more convenient, enabling continuous monitoring of user energy consumption, and providing sufficient and accurate user power consumption data and power quality record data for subsequent energy-saving audit software, which is conducive to the development of subsequent EPC and is also convenient for the market. widely used on a large scale.

Through the description of the above method embodiments, those skilled in the art can clearly understand that the utility model can be realized by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for making A computer device (which may be a personal computer, a server, or a network device, etc.) executes all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program codes such as read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk.

For the convenience of description, when describing the above devices, functions are divided into various units and described separately. Certainly, when implementing the utility model, the functions of each unit can be implemented in one or more software and/or hardware.

Each embodiment in this specification is described in a progressive manner, the same and similar parts of each embodiment can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device or system embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and for relevant parts, refer to part of the description of the method embodiments. The device and system embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, It can be located in one place, or it can be distributed to multiple network elements. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. It can be understood and implemented by those skilled in the art without creative effort.

It will be appreciated that the invention is applicable to numerous general and special purpose computing system environments or configurations. Examples: personal computers, server computers, handheld or portable devices, tablet-type devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, including A distributed computing environment for any of the above systems or devices, etc.

The invention may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The invention may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including storage devices.

It should be noted that in this article, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these No such actual relationship or order exists between entities or operations. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above descriptions are only specific implementation methods of the present utility model, so that those skilled in the art can understand or realize the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (5)

1. An energy-saving detector, characterized in that it comprises a housing, a peripheral interface module and a human-computer interaction module arranged on the housing, and a WIFI communication module and a three-phase voltage and current sampling module arranged in the housing module and data analysis module, where, The peripheral interface module, human-computer interaction module, three-phase voltage and current sampling module and WIFI communication module are respectively electrically connected to the data analysis module; The peripheral interface module includes a USB interface, an SD card interface, an RS-232 interface and a power socket electrically connected to the data analysis module respectively; The three-phase voltage and current sampling module includes a synchronous signal sampling module, a switching control module and a voltage and current acquisition module, a voltage and current sensing module, an instrument amplification module, a signal conditioning module and an ADC signal conversion module electrically connected in sequence, and the synchronous signal The input end of the sampling module is electrically connected to the voltage and current sensing module, the output end is electrically connected to the ADC signal conversion module, the input end of the switching control module is electrically connected to the data analysis module, and the output end is electrically connected to the The instrument amplification module, the input end of the voltage and current acquisition module is electrically connected to the circuit to be detected, and the output end of the ADC signal conversion module is electrically connected to the data analysis module; The data analysis module includes a DSP signal processing chip, a data buffer module, a FLASH memory and a RAM, and the DSP signal processing chip is respectively connected to the output end of the ADC signal conversion module, the input end of the switching control module and the The data buffer module is electrically connected, and the data buffer module is also electrically connected to the WIFI communication module, the human-computer interaction module, the FLASH memory and the RAM, and the FLASH memory and the RAM are also electrically connected to the USB interface and the SD card respectively. interface, RS-232 interface and power socket; The human-computer interaction module includes a CPLD logic control module, a display, buttons and a serial communication circuit, and the CPLD logic control module is electrically connected to the data buffer module, the display, buttons and the serial communication circuit respectively. 2. The energy-saving detector according to claim 1, wherein the peripheral interface module further comprises a temperature sampling interface, and the temperature sampling interface is electrically connected to the FLASH memory and the RAM respectively. 3. The energy-saving detector according to claim 1, wherein the DSP signal processing chip is a TMS320F2812 chip or a DSP2812 chip. 4. The energy-saving detector according to claim 1, wherein the CPLD logic control module adopts the EPM3256SQC144 chip. 5. The energy-saving detector according to claim 1, wherein the serial port communication circuit includes a wired communication circuit supporting RS-232 or RS-485 and a wireless communication circuit supporting GPRS.