CN104914296A - Multifunctional clamp meter - Google Patents

Abstract

The invention discloses a multifunctional clamp meter, which comprises a main control unit, a signal switching unit, a sound and light alarm module, a display unit, a flashlight control unit, an operation indication unit, a multimeter detection unit, a digital current measuring device and a non-contact type clamp meter. Voltage testing device, the non-contact voltage testing device also includes a distance measurement module, the AC and DC current detection module is a digital current measurement device, and is also provided with a data transmission module. The present invention is simple in structure, and by adding a distance measuring module on the existing clamp meter, the detection is safer; a high-speed AD sampling module is used in the main controller to make data collection faster and more accurate; finally, a data transmission module is added to make The monitoring data can be transmitted to the central control room or mobile storage device in real time, and the collected information can be backed up in time.

Description

A multifunctional clamp meter

technical field

The present invention relates to a clamp meter, in particular to a multifunctional clamp meter.

Background technique

Traditional digital multimeters are popular in the market for their intuitive display, accurate measurement and portability. However, with the development of science and technology, various mechanical equipment, communications, and electronic devices have become more intelligent. On-site inspection and fault diagnosis put forward higher requirements for test tools. High-speed sampling of the measured signal is realized on the basis of the function of the digital multimeter. Reappearance is the demand of the market, and it is also an inevitable trend in the development of tool-type measuring instruments.

The appearance of the clamp meter makes the measurement more diversified, and it is more convenient and fast for high-speed measurement of the measured signal. The existing clamp meter has basically complete functions, including sound and light alarm module, display unit, and flashlight control unit. , Operation indication unit, multimeter detection unit, digital current measuring device and non-contact voltage testing device. It is convenient to switch measurement tools, intuitive display and alarm unit, but it is still a direct reading measurement during electricity measurement, and its data are displayed instantaneously, requiring staff to carry out accompanying records; when performing non-contact measurement here, personnel You need to control the distance if you hold it in hand. If it is too close, the instrument will be damaged.

Contents of the invention

The purpose of the present invention is to provide a multifunctional clamp meter, which can measure the detection distance, and can send the detection data to an external device for storage and backup in real time.

The present invention adopts following technical scheme:

A multifunctional clamp meter, comprising a main control unit, a signal switching unit, an audible and visual alarm module, a display unit, a flashlight control unit, an operation indication unit, a multimeter detection unit, a digital current measuring device and a non-contact voltage testing device, The signal switching unit is connected to the main control unit, the sound and light alarm module, the display unit, the multimeter detection unit, and the flashlight control unit are connected to the main control unit, and the operation indicating unit and the non-contact voltage testing device are connected to the signal switching unit. On the unit, the non-contact voltage test device includes an AC/DC current detection module and a temperature measurement module, the AC/DC current detection module and the temperature measurement module are respectively connected to the signal switching unit, and the temperature measurement module can be changed from a multi-function clamp The table is disassembled separately and works independently; the non-contact voltage test device also includes a distance measurement module, and the AC and DC current detection module is a digital current measurement device, and is also provided with a data transmission module; the distance measurement module Connection and signal switching unit, the digital current measuring device and the data transmission module are respectively connected to the output end of the main control unit, the main control unit includes a signal differential processor, a high-speed AD sampling module data filtering module and a PLC, the said The signal differential processor is connected to the multimeter detection unit and the output end of the switching unit.

The data transmission module is a bluetooth module, which is used to transmit the detection data of the multi-function clamp meter to an external device for analysis and storage.

The wireless sending module of the data transmission device and its corresponding wireless receiving module are set in the central control room for real-time monitoring and storage of measurement data.

The distance measuring module is an infrared distance measuring module.

The digital current measuring device is composed of clamp head, clamp signal sensor, clamp switch control button, LCD digital display screen, rotary switch, control button and circuit part.

The temperature measurement module is provided with an infrared temperature measurement sensor, and the temperature measurement module gathers the energy of the target infrared radiation on the infrared temperature measurement sensor.

The temperature measurement module also includes a light sensor, and the temperature measurement module is connected with the signal switching director through the light sensor to realize data transmission.

The present invention is simple in structure, and by adding a distance measuring module on the existing clamp meter, the detection is safer; a high-speed AD sampling module is used in the main controller to make data collection faster and more accurate; finally, a data transmission module is added to make The monitoring data can be transmitted to the central control room or mobile storage device in real time, and the collected information can be backed up in time.

Description of drawings

Fig. 1 is a structural principle block diagram of the present invention;

Fig. 2 is a functional block diagram of the main controller of the present invention.

Detailed ways

As shown in Figure 1, a multifunctional clamp meter includes a main control unit, a signal switching unit, an acousto-optic alarm module, a display unit, a flashlight control unit, an operation indication unit, a multimeter detection unit, a digital current measuring device and a Contact voltage test device, the signal switching unit is connected to the main control unit, the sound and light alarm module, display unit, multimeter detection unit, and flashlight control unit are connected to the main control unit, the operation indication unit and the non-contact voltage The test device is connected to the signal switching unit. The non-contact voltage test device includes the NCV detection module, the AC and DC current detection module and the temperature measurement module. The NCV detection module, the AC and DC current detection module and the temperature measurement module are respectively Connected with the signal switching unit, the temperature measurement module can be disassembled from the multi-function clamp meter and work independently; it also includes a distance measurement module, a digital current measurement device and a data transmission module, the distance measurement module is connected with the signal switching unit, Described digital current measuring device and data delivery module are respectively connected with the output end of main control unit, as shown in Figure 2, described main control unit comprises signal differential processor, high-speed AD sampling module data filter module and PLC, described The signal differential processor is connected to the output end of the multimeter detection unit and the switching unit. This application uses a high-speed sampling measurement chip and a new CPU processor to measure and calculate electrical parameters such as voltage, current, active power, power factor, and electric energy.

High-speed sampling measurement Ordinary instruments usually use 2.5 times per second RMS average sampling double-integration method to measure, and industrial electricity usually contains too many harmonics, so the measurement data varies with the content of harmonics and other factors will make the measurement The result is inaccurate; the product mainly considers this part of the reason. The instrument design adopts a 44kHz high-speed sampling A/D for data acquisition for the first time, and performs TRMS true effective value calculation and filtering on the data through a high-speed CPU, thereby eliminating harmonic content. The influence of parameters (voltage, current, active power, power factor, electric energy, etc.) on the measurement results can improve the accuracy of the measurement data.

The data transmission module is a bluetooth module, which is used to transmit the detection data of the multi-function clamp meter to an external device for analysis and storage. Since this device involves the application of high-voltage measurement and man-machine dialogue platform, the man-machine dialogue platform is based on smart tablet computer, which allows users to input operations more quickly through the high-sensitivity touch screen, but at the same time ensures that man-machine input Complete isolation between the platform (smart tablet) and the measurement of high-voltage parameters to ensure measurement safety; through analysis and exploration, Bluetooth data transmission is one of the main options for realizing one-to-one wireless connection in industrial measurement. The advantages of easy pairing, low energy consumption, low cost, and high reliability. Therefore, the product is equipped with a Bluetooth module, which is convenient for post-processing of measurement data.

The data transmission device can also be set in the central control room through the wireless sending module and the corresponding wireless receiving module to monitor and store the measurement data in real time.

The distance measuring module is an infrared distance measuring module. The distance can be monitored by infrared ranging, and the minimum value of the distance is limited during the measurement. Once the minimum value is exceeded, the danger caused by the too close measurement distance can be avoided.

The digital current measuring device is composed of clamp head, clamp signal sensor, clamp switch control button, LCD digital display screen, rotary switch, control button and circuit part. It is more convenient to measure through the sensor set on the clamp head, and the display screen and the rotary switch are used to display the value and the measurement gear respectively.

The temperature measurement module is provided with an infrared temperature measurement sensor, and the temperature measurement module gathers the energy of the target infrared radiation on the infrared temperature measurement sensor. It can directly read the temperature value of the target to prevent the target temperature from being too high and the measurement personnel from being scalded without knowing it.

The temperature measurement module also includes a light sensor, and the temperature measurement module is connected with the signal switching director through the light sensor to realize data transmission. A light sensor can also be used to measure the target temperature.

In the present invention, there is high-speed data sampling, and the sampling data is transmitted to the smart tablet computer for display through the bluetooth connection mode. How to use these data to effectively provide better support and help for the daily work of grassroots electricians, then It is necessary for the system to further process the current data in order to reflect the true value of these attribute data. Through deep processing of the data, useful information such as the following can be effectively provided to grassroots electricians. Load power, instantaneous active power, instantaneous reactive power, instantaneous power factor. Signal differential processor, high-speed AD sampling module, data filtering module and PLC.

Claims (7)

1. a multi-functional pincerlike meter, comprise main control unit, signal switch unit, sound and light alarm module, display unit, electric torch control module, operation instruction unit, multimeter detecting unit, digital current measurement mechanism and contactless voltage test device, described signal switch unit is connected with main control unit, described sound and light alarm module, display unit, multimeter detecting unit, electric torch control module is connected on main control unit, operation instruction unit and contactless voltage test device are connected in signal switch unit, contactless voltage test device comprises ac and dc current and detects module and thermometric module, ac and dc current detects module and thermometric module is connected with signal switch unit respectively, thermometric module can be dismantled and work independently separately from multi-functional pincerlike meter, it is characterized in that: described contactless voltage test device also comprises range finder module, it is digital current measurement mechanism that described ac and dc current detects module, is also provided with data conveyor module, described range finder module connects and signal switch unit, described digital current measurement mechanism is connected with the output terminal of main control unit respectively with data conveyor module, described main control unit comprises signal differential processor, high-speed AD sampling module data filtering module and PLC, and described signal differential processor connects the output terminal of multimeter detecting unit and switch unit.

2. multi-functional pincerlike meter according to claim 1, is characterized in that: described data conveyor module is bluetooth module, carries out analyzing and storing to external unit for carrying the detection data of multi-functional pincerlike meter.

3. multi-functional pincerlike meter according to claim 1, is characterized in that: described data conveying equipment wireless sending module, and the wireless receiving module corresponding with it is arranged on Central Control Room, carries out Real-Time Monitoring and the storage of measurement data.

4. the multi-functional pincerlike meter according to the arbitrary claim of claim 1-3, is characterized in that: described range finder module is infrared distance measurement module.

5. multi-functional pincerlike meter according to claim 4, is characterized in that: described digital current measurement mechanism is then made up of binding clip, jaw signal transducer, binding clip switch control knob, LCD digital display screen, rotary switch, control knob and circuit part.

6. multi-functional pincerlike meter according to claim 5, is characterized in that: described thermometric module is provided with an infrared temperature-test sensor, described thermometric module by the energy accumulating of Target Infrared Radiation on infrared temperature-test sensor.

7. multi-functional pincerlike meter according to claim 6, is characterized in that: described thermometric module also comprises optical sensor, and this thermometric module is connected the transmission realizing data with the signal switching person of leading by optical sensor.