31results about How to "Avoid testing errors" patented technology

The present invention discloses an apparatus for testing elements comprising: a loading portion on which at least one tray, on which a plurality of elements are loaded, is loaded; a loading buffer portion for receiving the elements from the tray on the loading portion through a loading transport tool, and temporarily loading the elements; a test portion for receiving the elements from the loading buffer potion and carrying out a test; an unloading buffer portion, which is positioned opposite the loading buffer portion with the test portion at the center, for receiving the elements which have undergone testing by the test portion; and an unloading portion for categorizing and loading the elements that are loaded on the unloading buffer portions by means of the unloading transport tool, depending on the result of the test carried out by the test portion; and at least one element pressing tool for transporting the elements between the loading portion, the test portion, and the unloading portion.

The invention provides a leakproofness test device for an HVAC pipeline. The leakproofness test device comprises a test tube A, a pressure gauge A, a test tube B, a pressure gauge B, a cleaning drum,a step groove, a top cover and agitating blades; the test tube A transversely penetrates out of a device body, and the test tube A is respectively connected with a first control valve and a second control valve; the test tube B further transversely penetrates through the device body, and the test tube B is connected with a third control valve; the two ends of the cleaning drum are respectively connected with an inlet pipe and an outlet pipe; horizontal pipe ends of the inlet pipe and the outlet pipe are connected with an on-off valve; a small motor is fixed in the middle of the top of the topcover through bolts, a stirring shaft is connected to the bottom of the small motor, and a plurality of groups of agitating blade are welded on the stirring shaft. Cleaning liquid can be added througha feeding hole, and the cleaning liquid can be conveyed into the HVAC pipeline through water flow, so that the cleaning liquid can fully act on the HVAC pipeline, thus the cleaning effect of the HVACpipeline can be improved, HVAC leakage test can be carried out, and the HVAC can also be cleaned.

The invention provides an additional mass based determination method and device for density of a composite grout rock-fill dam. The method includes the following steps: placing a backing plate on a composite grout rockfill material, after three days of coagulation of the to-be-determined composite grout rockfill material, and stacking a plurality of mass blocks on the backing plate; taking a massblock of an uppermost layer as a detection point, collecting natural vibration frequency, removing the mass block of the uppermost layer, taking a mass block of a sub-upper layer as the detection point, repeating the collection process until all the mass blocks are removed, and obtaining the measured natural vibration frequency on each of the mass blocks; and obtaining the density of the compositegrout rockfill material based on the measured natural vibration frequency on each of the mass blocks. Therefore, abnormal signals, caused by excessive surface strength of the composite grout rock-fill dam, are avoided; and test errors, caused by changes of mechanical parameters of a rockfill in a coagulation process of the composite grout rockfill material, are avoided.

The present invention discloses a unit test method and device, wherein the method includes: obtaining the test object input under the current unit test, obtaining each class information and method information corresponding to the test object through a reflection mechanism, and sequentially according to each class information and method information to generate unit test code according to preset rules and preset code templates; unit test code includes combined index key information; loads the associated configuration list from the database according to the combined index key information, and parses the configuration list, in turn Read all the parsed test case data, execute the unit test code, and generate a test report according to the execution result. It not only realizes the automatic generation of unit test code, which greatly improves the development efficiency of unit test code; but also loads the associated configuration list from the database by combining index key information to realize the automation of unit test, avoid test errors caused by human factors, and improve Test efficiency and accuracy.

The invention discloses a relay protection tester based on an embedded system, and a checking method for the relay protection tester. The tester comprises the embedded system based on an advanced RISC machine (ARM11), a display screen, keyboard and mouse equipment, a printer, a global positioning system (GPS) positioning device and a global packet radio service (GPRS) communication interface, wherein the embedded system based on the ARM11 is connected with the display screen, the keyboard and mouse equipment, the printer, the GPS positioning device and the GPRS communication interface respectively, controls power through a universal serial bus (USB) or an Ethernet interface and is connected with a relay protection device through an RS232 interface. By the tester and the checking method, experiment current can be calculated; test current output by the relay protection tester can be controlled; after the protection device runs, running data are received by the RS232 interface of a device panel, and a result is compared with a theoretical value; and therefore, correctness of running can be judged. By using the relay protection tester, each main transformer protection checking time can be averagely shortened by 1 hour.

The invention discloses a one-key type test method for optical digital relay protection devices. A test key is started by an operator, and then a digital tester reads information of a tested digital relay protection device through an Ethernet port and generates a test scheme according to IEC61850 communication standards, inspects the quantity of alternating current, voltage, input and output of the protection device, checks protection test items in turn until all test is completed, and automatically generates a test report. The method can really realize one-key type test, reduces requirementsfor testers, improves test efficiency, and avoids test errors produced because of inappropriate chosen test methods. The method has the advantages of ensuring more intelligent and automatic relay protection test process, shortening outage time, reducing labor intensity and interference of human factors and improving test reliability and accuracy.

The invention discloses a USB chip silicon wafer level automatic test device which comprises a test channel, a failure data memory, a random access memory, a non-return-to-zero inverted decoding module, a data file and a test program. The USB chip silicon wafer level automatic test device can respectively store simultaneously-read handshake response signals or data of a plurality of USB chips in the random access memory to avoid test errors caused by the asynchronous response of the plurality of USB chips. The handshake response signals or data of the non-return-to-zero inverted coding, which are stored in the random access memory, can be decoded by the USB chip silicon wafer level automatic test device to achieve the simultaneous test of the plurality of USB chips, increase the number of simultaneously-tested chips and reduce the test cost. The invention also discloses a USB chip silicon wafer level automatic test method.

The invention relates to high-voltage multi-point testing equipment and a method with main and auxiliary steps. The method comprises the following steps of: connecting a plurality of groups of objects to be tested with the testing equipment and setting various testing parameters through an input device; when testing is begun, carrying out a main-step high-voltage testing program firstly, i.e. simultaneously outputting high voltage to the plurality of groups of objects to be tested through a high voltage generating device, and detecting whether the plurality of groups of objects to be tested are normal or not in the main-step testing program through a central control unit; if so, judging the plurality of objects to be tested are all good products to finish testing; and if the central control unit judges any one of the plurality of objects to be tested is abnormal, entering an auxiliary-step testing program, i.e. respectively testing each group of objects to be tested, and displaying testing results on a display, therefore, which group of tested objects are defective products can be learnt by virtue of the display results on the display. The invention can reduce the testing time andimprove the testing speed and is easy to reject the defective products by operators.