Solar irradiance is the fundamental core data for all design, measurement, and operation work in the photovoltaic industry. The accuracy of irradiance measurement directly determines the accuracy of key tasks such as photovoltaic power plant generation prediction, component selection and matching, system efficiency evaluation, fault loss analysis, and engineering acceptance measurement. At present, there are obvious shortcomings in the monitoring system of domestic photovoltaic power stations. Large fixed meteorological stations can only collect single point irradiation data from the station, which cannot meet the needs of mobile measurement for roofs, mountains, and distributed multi-point locations; Traditional simple portable irradiance meters use low-level sensors with poor spectral matching and large temperature drift errors. They can only roughly read a single irradiance value and cannot synchronously collect supporting parameters such as environmental temperature and component backplate temperature. In complex outdoor lighting and temperature environments, measurement data distortion is severe, making it difficult to support high-precision measurement and detection work. In response to the industry's demand for multi-point mobile precise light energy measurement, Jiangsu Jingwei Technology has launched the JW-F04 portable irradiance meter, which is equipped with a second level standard spectral response sensor and integrates functions such as multi parameter synchronous acquisition, intelligent environment compensation, and portable long-term endurance. It has become a standard equipment for mobile light energy monitoring in photovoltaic fields, suitable for various scenarios such as resource survey, power station acceptance, operation and maintenance efficiency diagnosis, and third-party measurement and testing. Portable irradiation system dosimeter
The Jiangsu Jingwei R&D team focuses on the professional needs of photovoltaic irradiation measurement and achieves core breakthroughs in sensing hardware. JW-F04 adopts a high-precision silicon optical sensing probe that matches the standard photovoltaic cell spectrum. The spectral response is closely related to the photosensitive characteristics of silicon-based components, which greatly reduces the measurement error caused by spectral mismatch compared to general illuminance meters. The measurement range covers 0 to 2000W/㎡ and is fully suitable for high light intensity at noon, low light intensity on cloudy days, and high light intensity in the morning and evening. The measurement resolution reaches the industry's high-precision standard, and even small light fluctuations can be accurately captured. The device is equipped with multiple temperature compensation circuits and an external high-precision temperature probe, which can synchronously collect ambient air temperature and photovoltaic module backplane temperature, record irradiance and temperature as two core data sets, and solve the pain point of traditional equipment single parameter measurement that cannot complete STC standard operating condition conversion. Combined with supporting algorithms, it can complete real-time power correction calculation on site, without the need for manual secondary conversion in the later stage, greatly simplifying the on-site data processing process.
The portable design of the whole machine is highly suitable for outdoor mobile inspection operations. The main body is small and lightweight, and can be held and operated with one hand. The probe and the main body use anti bending and extended connection wires, which can be flexibly placed at any point on the photovoltaic module plane, inclined roof, or mountain array, without being affected by the obstruction of the equipment body and affecting the measurement values; The whole set of equipment is compact in size after storage, and can be carried around in a tool kit. It can be flexibly used for household photovoltaic on-site survey, multi-point detection in mountainous areas, and distributed roof multi-point comparative measurement, without the need to transport large monitoring equipment. The host screen is equipped with a backlit high-definition display screen, which can read data clearly in both day and night environments. It supports real-time numerical display and two automatic data recording modes of 5 minutes/1 hour. Long term fixed-point survey does not require continuous manual monitoring. The device automatically stores each set of irradiation and temperature data, and has a large capacity local storage that can retain tens of thousands of monitoring records, meeting the continuous measurement needs of multiple points throughout the day.
The adaptability to outdoor environments and intelligent functions have been fully upgraded. The JW-F04 sensing probe has a protection level of IP67, is dustproof, waterproof, and resistant to UV aging. It can be placed outdoors for short-term fixed-point monitoring for a long time, and is not afraid of rainwater and sand erosion; The main machine body is made of high temperature and anti-aging materials, which can work stably in a wide temperature range from minus 20 ℃ to 60 ℃, and is suitable for photovoltaic projects in various regions such as the severe cold in northwest China, the high temperature and humidity in south China, and coastal exposure. The device is equipped with a low-power chip solution, and ordinary rechargeable lithium batteries can continuously record data for 72 hours when fully charged. Long term surveys in non charging environments in the field do not require frequent power replacement. All stored data can be exported as a table file with one click through a USB data cable. The data is marked with time and location tags and can be directly imported into power generation measurement software and detection report systems. Standardized light energy monitoring records are automatically generated, and the data accuracy meets the measurement and detection standards of the photovoltaic industry. It can be used as an effective basis for engineering acceptance and power plant energy efficiency analysis. The device operation logic is minimalist, retaining only the core function buttons for measurement, storage, and export, without the need for complex parameter settings. New employees can quickly get started with the operation, reducing the training cost of the enterprise.
From the perspective of industry application value, the JW-F04 portable irradiance meter can cover multiple core links in the entire photovoltaic industry chain. In the stage of photovoltaic resource survey, staff carry equipment to the land to be developed, collect full day irradiation data from multiple points, accurately evaluate the local solar energy resource endowment, and optimize the overall design and component capacity ratio of the power station; In the final acceptance stage of the power station, cooperate with the IV tester to synchronously collect on-site irradiation and temperature data, accurately calculate the actual output power of the components, and determine whether it meets the nominal parameters of the contract; In the daily operation and maintenance stage, compare the irradiation values at multiple points, investigate the power generation loss caused by component obstruction, bracket angle deviation, and dust accumulation loss, and develop precise cleaning and adjustment operation and maintenance plans; At the same time, it is widely supported by third-party photovoltaic measurement and testing institutions as standardized auxiliary measurement equipment to support the issuance of compliance testing reports.
In the past, high-precision secondary standard irradiation measurement equipment relied on imports for a long time, with high procurement costs and long supply cycles for accessories, making it difficult for small and medium-sized new energy enterprises to purchase in bulk. Jiangsu Jingwei JW-F04 has achieved fully independent research and development and production of sensing chips and compensation algorithms, significantly reducing procurement costs under the same measurement accuracy. It comes with a one-year complete machine warranty, lifetime free calibration guidance, and national technical after-sales support services, allowing distributed operation and maintenance and small engineering enterprises to be equipped with multi-point mobile monitoring equipment in bulk. After the product was launched on the market, it has been equipped with photovoltaic operation and maintenance teams and testing institutes in Jiangsu, Shandong, Anhui, and Northwest China. It stably outputs accurate data in roof distributed batch surveys, mountain photovoltaic resource assessments, and efficiency diagnosis projects for old power stations, effectively solving industry problems such as one-sided single point monitoring data and large errors in simple equipment.
The refined development of photovoltaics relies on accurate and multi scenario basic environmental monitoring data support. The JW-F04 portable irradiance meter fills the market gap of domestic high-precision mobile light energy measurement equipment. Jiangsu Jingwei will continue to iterate its sensing accuracy and data linkage functions, establish data interoperability with IV testers and meteorological station equipment, build an integrated photovoltaic on-site monitoring solution, continuously optimize equipment endurance and outdoor durability, empower the entire chain of photovoltaic resource assessment, engineering acceptance, and intelligent operation and maintenance with domestically produced high-precision portable monitoring equipment, and promote the industry's shift from extensive management to data-driven refined operation.
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