CN2777551Y - Simulating tester for multi factor united effect of Electrostatic dynamic potential - Google Patents

Abstract

The utility model provides a multi-factor joint effect simulation test device for electrostatic dynamic potential, which is composed of a simulation room, a data acquisition and processing system connected to each other, and the simulation room includes a rotating friction disc, a static friction disc, a temperature measuring probe, a humidity measuring probe, The lifting control device, the driving motor, the rotating friction disc and the stationary friction disc are installed opposite to each other, and are connected to the driving motor. The static friction disc is connected to the lifting control device through the force tray. The data acquisition and processing system includes an electrostatic dynamic potential measuring probe, a host, The computer and the electrostatic dynamic potential measuring probe are respectively connected to the host computer and the computer in sequence. The device has perfect structure, multiple functions, strong authenticity, and strong signal processing ability, and can be widely used in the storage and handling of dangerous goods or the transportation process of railways, highways, ships, etc., with low cost and strong application value.

Description

Instructions A multi-factor joint effect simulation test device for electrostatic dynamic potential

Technical field

The utility model relates to the technical field of electrostatic testing, in particular to an electrostatic dynamic potential measuring device.

Background technique

Electrostatic discharge (ESD for short) refers to the phenomenon that when the field strength around the charged body exceeds the insulation breakdown field strength of the surrounding medium, the electrostatic charge on the charged body partially or completely disappears due to the ionization of the medium. The internal cause depends on the conductive properties of the material. The material with volume resistivity in the range of 10 ¹¹ ~ 10 ¹⁵ Ω.cm is most likely to generate static electricity; the external cause is various, such as friction between objects, electric field induction, dielectric pole Chemicalization, charged particle attachment, etc.

The faults and hazards caused by ESD are commonly known as electrostatic disasters. Compared with conventional electric energy, electrostatic energy is relatively small and is often ignored by people. However, in the process of electrostatic discharge, transient large current is injected concentratedly, which may easily cause accidents such as fire, explosion, and electric shock to the human body. Since the middle of the 20th century, with the rapid development of industrial production and the rapid promotion and application of polymer materials, ESD disasters have become increasingly serious, and have gradually become the main cause of fire, explosion and other accidents in industries such as pyrotechnics, chemicals, petroleum, powder processing, and gas. One of the predisposing factors is also one of the hidden dangers of quality and safety accidents in the processing of flax, chemical fiber and other textile industries, and it is also one of the important reasons for causing human electric shock hazards. In the field of microelectronics technology, tens of billions of dollars are lost every year due to ESD hazards; in "static dangerous places" where ammunition, explosives, flammable and explosive gases, and dust exist, many vicious accidents such as combustion and explosion are caused by ESD hazards; In aerospace and aviation, ESD hazards have caused aircraft crashes, rocket launch failures, and satellite failures. Therefore, research on electrostatic disaster protection is one of the key safety technologies faced by various industries.

Research on electrostatic disaster protection, that is, electrostatic safety engineering, includes static electricity generation/discharge mechanism, electrostatic interaction mechanism, ESD model, electrostatic testing technology, electrostatic protection design, etc. Among them, electrostatic testing technology has a special status. It undertakes the task of detecting "dangerous electrostatic sources" and evaluating the electrostatic properties of materials. Both electrostatic mechanism research and electrostatic protection design rely on it. In other words, electrostatic testing is the technical basis for the research and implementation of electrostatic protection engineering, which directly restricts the development of electrostatic protection theory and technology.

The objects of electrostatic testing include parameters such as potential, electricity, capacitance, resistivity, leakage resistance, and charge decay time. Among them, for the effectiveness test of electrostatic protection measures and the analysis of electrostatic accidents, the most important and intuitive basis for judgment is the level of electrostatic potential. Therefore, the development of electrostatic voltmeter has always been the main direction of electrostatic testing. At present, according to the working mode, electrostatic voltmeters are divided into contact type and non-contact type; according to the signal characteristics, electrostatic voltmeters can be divided into electrostatic static potential and electrostatic dynamic potential.

The contact type is to make the measured object directly contact with the electrostatic voltmeter, and use the equipotential principle to measure. This type of instrument is only suitable for the measurement of the charged potential of static conductors, and it is powerless for insulators that are more likely to generate static electricity. Its representative product is the Q-V series electrostatic voltmeter. The non-contact type is not in contact with the measured object, and uses the principle of electrostatic induction or air ionization to indirectly measure the electrostatic potential of the charged object. This type of instrument is suitable for measuring the electrostatic potential of conductors, insulators and human bodies. According to different working principles, this type of instrument is divided into three categories: direct induction type, AC modulation type and air ionization type. Compared with contact measurement, non-contact measurement results are less affected by the input capacitance and input resistance of the meter, but are more affected by the test distance and the geometric size of the charged body.

In modern electrostatic safety engineering, the probability of electrostatic disasters is not only determined by the static potential of dangerous static sources, but also more related to the dynamic potential of static electricity. In the process of dangerous goods handling, stacking, vehicle transportation and other operations, the dynamic potential of static electricity is particularly critical, and its peak potential must be controlled below the safe potential. Therefore, it is very important to develop electrostatic dynamic potential testing equipment and accurately measure the dynamic potential value of dangerous static sources under different environmental conditions for formulating protective technical measures for electrostatic disasters and carrying out electrostatic safety management.

At present, most of the potential transfer functions of existing domestic electrostatic voltmeters are functions of frequency. For signals of different frequencies, the potential attenuation ratios are different. In actual testing, there is frequency distortion, which is difficult to use in dynamic testing. For example, the QV series electrostatic voltmeter adopts cursor indication, the damping is large, and it takes a certain time for the cursor to stabilize, so it cannot be used for dynamic testing. There are only two kinds of instruments that can really be used for electrostatic dynamic potential. One is the ZPD-1 electrostatic dynamic potential tester developed by Academician Liu Shanghe of Shijiazhuang Ordnance Engineering College in 1988, and the other is Huang Huang of the Beijing Institute of Labor Protection Science. Dr. Jiusheng presided over the development of EST405 electrostatic dynamic computer monitoring and alarm system in 2003. ZPD-1 Electrostatic Dynamic Potential Tester adopts the test principle of "signal self-shielding-charge coupling" proposed by Academician Liu Shanghe, and can use the meter to display the maximum absolute value of the measured potential signal during the entire test process, which is convenient for determining the dynamic characteristics of the electrostatic source and its danger. However, the attenuation constant of the test signal of the instrument is on the order of 10 ⁷ s. For general tests, the impact of this attenuation on the test results can be ignored, but it may still cause large test errors for long-term monitoring. Therefore, the instrument is not suitable for use as a monitoring instrument. EST405 electrostatic dynamic computer monitoring and alarm system, adopts the principle of resistance-capacitance partial pressure to measure electrostatic potential, is composed of static detection probes and alarms, and can monitor the static electricity of people and goods entering and leaving important departments. However, there are still defects in the application of ZPD-1 and EST405 in the operation process of many dangerous goods with large electrostatic hidden dangers. For example, during the manual handling of dangerous goods, and during the transportation of railways, highways, ships, etc., due to various vibrations and friction, static electricity is easy to accumulate to a dangerous high level, and there are reports of spontaneous combustion accidents on the way of transportation vehicles. , How high is the static electricity accumulated in the above operation process, what is the polarity, due to the limitation of cost and technical implementation, it is still impossible to realize the real-time monitoring of the whole process; in addition, both ZPD-1 and EST405 are passive real-time measurements on the site. No advance warning of a hazardous situation can be given.

Contents of Invention

The purpose of this utility model is to overcome the shortcomings and problems of the prior art, and provide a kind of operation process (such as the transportation of flammable and explosive dangerous goods) that cannot be detected in real time in the field of warehouses, oil tankers, and railway/highway transportation. , handling, stacking, etc.), to achieve real simulation, and to continuously and real-time record and display the multi-factor joint effect simulation test device of the electrostatic dynamic potential accumulated in the process of these operations, the size, polarity and dynamic waveform of the electrostatic dynamic potential .

The utility model is realized through the following technical scheme: the multi-factor joint effect simulation test device of the electrostatic dynamic potential is composed of a simulation room, a data acquisition and processing system connected to each other, and the simulation room includes a working room, a machine base and a frame, The working room is installed between the base and the frame, with a manipulator installed on the top, a temperature measuring probe and a heating pipe on the inner bottom, and a moisture absorption box and a humidity measuring probe on the inner side; a frequency conversion device is installed on the base. motor, base controller, the base controller is electrically connected with the temperature measuring probe, heating pipe, moisture absorption box, humidity measuring probe, and frequency conversion motor respectively, and the frequency conversion motor is connected with the rotating shaft installed at the bottom of the working room through the rotating shaft The friction discs are connected, and a static friction disc is installed opposite to the top of the rotating friction disc. The static friction disc is fixedly connected with the lower end of the force application tray through the force application shaft. The force application weight is placed in the force application tray, and the upper end of the force application tray It is fixedly connected with the lifting control device installed on the frame; the data acquisition and processing system includes an electrostatic dynamic potential measurement probe, a host computer, and a computer, and the electrostatic dynamic potential measurement probe is installed on the force-applying shaft and the manipulator respectively. , and connected to the host computer and computer in turn.

In order to better implement the utility model, the shape of the rotating friction disc is disc-shaped, and the shape of the static friction disc is any one other than disc shapes such as open shape, strip shape, triangle shape and trefoil shape, The shape of the friction material corresponds to the shape of each rotating friction disc and the stationary friction disc respectively.

The lifting control device includes a pulley at the upper end of the tray, a steel rope, a frame pulley block, a worm, and a rocker. The upper and lower ends of the force-applying tray are connected to the pulley seat of the upper pulley of the tray through long bolts, and one end of the steel rope is connected to the frame. Its other end is connected with described worm through pallet upper pulley, frame pulley block, and worm is installed in the described support rear portion, and described rocking handle is installed in the end of worm.

The lifting distance of the lifting control device is 0-200 mm, and the adjustment range of the signal sampling position of each electrostatic dynamic potential measuring probe in the vertical and horizontal directions is 0-100 mm.

The rotational speed range of the variable frequency motor is 0.1-522rpm, and the weight range of the applying weight is 10-200kg.

The temperature control range of the working room is 20-60°C, and the humidity control range is 20%-90%.

The simulation test method of the multi-factor joint effect simulation test device of described electrostatic dynamic potential comprises:

(1) Specifically analyze the dangerous operating conditions that need to be evaluated, and determine the set values of the parameters related to the electrostatic dynamic potential, including friction materials, the number of frictions that exist at the same time, friction, speed, humidity, and temperature;

(2) According to the friction material and friction quantity determined in step (1), fix the corresponding friction material on each of the rotating friction discs and stationary friction discs respectively, and the shape of the rotating friction discs is a disc The shape of the static friction disc is any one other than the disc shape such as open shape, strip shape, triangle shape, trilobal shape, etc., and the shape of the friction material corresponds to the shape of each rotating friction disc and static friction disc respectively;

(3) Adjust the lifting control device and each static friction disc, and according to the set value of the friction force determined in step (1), place the required number of force application weights in the force application tray, so that each group The friction material is in close contact, and the weight range of the applying weight is 10-200kg;

(4) Connect the static dynamic potential measuring probes with the host computer and the computer in sequence, and install the static dynamic potential measuring probes respectively on the force-applying shafts on the upper sides of each static friction disc through the probes, and each static dynamic potential The measuring probe is located on the upper surface of the friction material fixed by the corresponding rotating friction disc. Set the signal sampling position of each electrostatic dynamic potential measuring probe in the vertical and horizontal directions. The adjustment range is 0-100mm. An electrostatic dynamic potential measuring probe is reversely installed on the manipulator;

(5) According to the temperature and humidity setting values determined in step (1), by controlling the base controller, the indications of the temperature measuring probe and the humidity measuring probe reach the setting value, and the working chamber The temperature control range is 20-60°C, and the humidity control range is 20%-90%;

(6) According to the speed setting value determined in step (1), by controlling the base controller, the speed of the variable frequency motor is set within the range of 0.1 to 522rpm, and the variable frequency motor is turned on;

(7) By controlling the host computer and the computer, each of the electrostatic dynamic potential measuring probes is turned on, and the size, polarity and dynamic waveform of the electrostatic dynamic potential of each of the friction materials are tracked and measured, and at the same time, by controlling the base controller , keeping the frequency conversion motor and the rotating friction disc rotating for 5 seconds to 10 minutes;

(8) Stop the frequency conversion motor and the rotating friction disc, and simultaneously shake the rocking handle at the end of the worm, so that the two ends are respectively fixed on the worm and the steel rope on the frame, and pass through the pulley block of the frame, the pallet The upper pulley drives the two sets of force-applying trays connected to the lifting control device to rise rapidly, and the lifting distance is 0-200mm, so as to realize the rapid separation of the corresponding two sets of friction materials;

(9) Adjust the manipulator so that the two electrostatic dynamic potential measuring probes are respectively located on the upper and lower surfaces of the separated friction material in step (8), and the adjustment range of the signal sampling position in the vertical and horizontal directions is 0 ~ 100mm, respectively measure the size and polarity of the electrostatic potential on the surface of the two groups of friction materials after separation;

(10) Save, analyze and process the above-mentioned measured values by the computer, and calculate the multi-factor joint effect simulation test results of the electrostatic dynamic potential.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

(1) Perfect structure and many functions. Compared with the existing electrostatic dynamic potential test instruments (ZPD-1 and EST405), this multi-factor joint effect simulation test device for electrostatic dynamic potential adds a simulation room to make the structure more perfect, and at the same time significantly expands the existing measurement of EST405 Function, not only retains the passive real-time measurement characteristics of EST405, but also can truly simulate the operation process that cannot be detected in real time, and can continuously and real-time record and display the magnitude, polarity and Dynamic waveform, and can analyze the mechanism of static electricity and verify and correct the static electricity sequence. More importantly, it can pre-evaluate the operating conditions with serious electrostatic hidden dangers and cannot be measured in real time, which is conducive to targeted static electricity before operation. Protective measures;

(2) Strong authenticity. The analysis shows that in the fields that require simulation tests, the most types of friction occur simultaneously during the handling of dangerous goods, among which there are four types of friction that are most likely to generate electrostatic dynamic potentials: between the handling tool and the floor, between the handling tool and the cargo The friction between the transportation tool and the truck, between the transportation tool and the human body, etc., through the multi-factor joint effect simulation test device of the electrostatic dynamic potential of the utility model, can simulate four kinds of friction at the same time, and the humidity, temperature, friction force, etc. Parameters can be adjusted over a wide range to simulate the worst operating conditions.

(3) Strong signal processing ability. The data acquisition and processing system described in this simulation test device can realize the real-time tracking measurement of the electrostatic dynamic potential on the surface of each group of friction materials through the static dynamic potential measurement probe, the host computer, and the computer, and display the static dynamic potential of the measured object more intuitively through the computer. The magnitude, polarity and dynamic waveform of the potential.

(4) Wide range of applications. The utility model can be widely used in many operating conditions with high hidden dangers of static electricity, such as the storage and handling of dangerous goods or the transportation process of railways, highways, ships, etc., and the simulation test device is low in cost and has strong application value.

Description of drawings

Fig. 1 is the structural representation of the multi-factor joint effect simulation test device of the utility model electrostatic dynamic potential;

Fig. 2 is a schematic diagram of the shape of the rotating friction disc and the stationary friction disc shown in Fig. 1;

Fig. 3 is the left side view of the simulation chamber shown in Fig. 1;

Fig. 4 is the plan view of simulation room shown in Fig. 1;

Fig. 5 is a schematic diagram of the installation structure of the electrostatic dynamic potential measuring probe shown in Fig. 1;

Fig. 6 is a partial view of A-A and B-B shown in Fig. 5 .

Detailed ways

The utility model will be described in further detail below in conjunction with the examples, but the implementation of the utility model is not limited thereto.

Example

Fig. 1 has provided the structural representation of the multi-factor joint effect simulation test device of this electrostatic dynamic potential, as shown in Fig. The probe 2, the host computer 3 and the computer 4 are sequentially connected to form.

The simulation room includes a working room 5, a frame 6 and a frame 7, the working room 5 is installed between the frame 6 and the frame 7, a manipulator 8 is installed on the top, and a temperature measuring probe 9 and a heating pipe 10 are arranged on the inner bottom surface. The inner surface is provided with a moisture absorption box 11 and a moisture measuring probe 12; a frequency conversion motor 13 and a base controller 14 are installed on the base 6, and the base controller 14 is connected with the temperature measuring probe 9, the heating tube 10, the moisture absorption box 11, and the measuring probe respectively. The wet probe 12 and the variable frequency motor 13 are connected electrically. Through the control of the machine base controller 14, the temperature control range of the studio 5 is 20-60°C, the humidity control range is 20%-90%, and the speed range of the variable frequency motor 13 is 0.1～522rpm, the variable frequency motor 13 is connected with the 4 rotating friction discs 16 installed at the bottom of the studio 5 through 4 rotating shafts 15, and 4 stationary friction discs 17 are installed opposite to the rotating friction discs 16, and the friction materials 18 are respectively fixed On the stationary friction disc 17 and the rotating friction disc 16. As shown in Figure 2, the shape of the rotating friction disc 16 is disc-shaped a, and the shape of the stationary friction disc 17 is any one other than disc-shaped a, which can be strip-shaped b, open-shaped c, triangle d, three-lobed The shapes of the friction material 18 correspond to the shapes of the rotating friction discs 16 and the stationary friction discs 17 respectively. Each static friction disc 17 is fixedly connected to the lower end of the force application tray 20 through the force application shaft 19, and force application weights 21 are placed in the four force application trays 20, and the weight ranges of the force application weights 21 on each force application tray 20 are respectively 10~200kg.

The upper end of the force application tray 20 is fixedly connected with the lifting control device, as shown in Figures 1, 3, and 4, the lifting control device is installed on the frame 7 outside the working room 5, including the upper end of the pallet pulley 22, steel rope 23, frame Pulley block 24, worm screw 25, rocking handle 26, the upper and lower ends of applying force tray 20 are connected with the pulley seat of tray upper end pulley 22 by long bolt 27, steel rope 23 one ends are connected with frame 7, and its other end passes tray upper end pulley 22, Frame pulley block 24 is connected with worm screw 25, and worm screw 25 is installed in support 6 rear portions, and rocking handle 26 is installed in the end of worm screw 25, and the lifting distance of lifting control device is 0～200mm.

As shown in Figures 5 and 6, the manipulator 8 is installed on the top of the working room 5, between the two force application trays 20 connected to the lifting control device, and the three electrostatic dynamic potential measurement probes 2-1 are respectively installed on the On the force application shaft 15 on the upper side of the three static friction discs 17, and the three electrostatic dynamic potential measurement probes 2-1 are all located on the upper surface of the fixed friction material 18 of each rotating friction disc 16, each electrostatic dynamic potential measurement probe 2 -1 The adjustment range of the signal sampling position in the vertical and horizontal directions is 0-100mm; the other two electrostatic dynamic potential measurement probes 2-2 are reversely installed on the manipulator 8 through the probe clip 28. When measuring, the two electrostatic dynamic potential The potential measurement probes 2-2 are respectively located on the upper and lower surfaces of the fixed friction material 18 of the corresponding rotating friction disc 16 and stationary friction disc 17, and the adjustment ranges of signal sampling positions in the vertical and horizontal directions are both 0-100 mm.

The simulation test working process of the multi-factor joint effect simulation test device of this electrostatic dynamic potential is as follows:

(1) Specifically analyze the dangerous operating conditions that need to be evaluated, and determine the set values of the parameters related to the electrostatic dynamic potential, including friction materials, the number of frictions that exist at the same time, friction, speed, humidity, and temperature;

(2) According to the friction material and friction quantity determined in step (1), the corresponding four groups of friction materials 18 are respectively fixed on the four rotating friction discs 16 and the stationary friction discs 17, and the shape of the rotating friction discs 16 is disc-shaped , the shape of the static friction disc 17 is a bar shape b, an open shape c, a triangle d, and a three-leaf shape e, and the shapes of the four groups of friction materials 18 correspond to the shapes of the four rotating friction discs 16 and the four static friction discs 17 respectively;

(3) Adjust the lifting control device, each static friction disc 17, and according to the set value of the friction force determined in step (1), place the required number of force application weights 21 in the force application tray 20, so that each group of friction The materials are in close contact with each other, and the weight range of the force weight 21 is 10-200kg;

(4) 5 electrostatic dynamic potential measuring probes 2 are connected with the host computer 3 and the computer 4 in turn, and the electrostatic dynamic potential measuring probes 2- 1, and each electrostatic dynamic potential measurement probe 2-1 is located on the upper surface of the friction material 18 fixed by the corresponding rotating friction disc, and the signal sampling position of each electrostatic dynamic potential measurement probe 2-1 in the vertical and horizontal directions is set, and its adjustment The ranges are 0-100mm, and at the same time, the other two electrostatic dynamic potential measurement probes 2-2 are reversely installed on the manipulator 8 through the probe clip 28;

(5) According to the temperature and humidity setting values determined in step (1), by controlling the base controller 14, the indications of the temperature measuring probe 9 and the humidity measuring probe 12 reach the setting value, and the temperature control range of the working room 5 It is 20～60℃, and the humidity control range is 20%～90%;

(6) According to the speed setting value determined in step (1), by controlling the machine base controller 14, the variable frequency motor 13 speed is set between 0.1～522rpm, and the variable frequency motor 13 is turned on;

(7) By controlling the host computer 3 and the computer 4, each static dynamic potential measuring probe 2 is opened, and the size, polarity and dynamic waveform of the static dynamic potential of each friction material 18 are tracked and measured, and the frequency conversion is maintained by controlling the base controller 14 simultaneously. The motor 13 and the rotating friction disc 16 rotate continuously for 5 seconds to 10 minutes;

(8) Stop the frequency conversion motor 13, the rotating friction disc 16, and shake the rocking handle 26 at the end of the worm screw 25 rapidly at the same time, so that the two ends are respectively fixed on the steel rope 23 on the worm screw 25 and the frame 7, and pass through the frame pulley block 24, the tray The upper pulley 22 drives the two groups of force-applying trays 20 connected to the lifting control device to rise rapidly, and the lifting distance is 0-200 mm, so that the corresponding two groups of rotating friction discs 16 and stationary friction discs 17 are quickly separated from the fixed friction material 18;

(9) Adjust the manipulator 8 so that the two electrostatic dynamic potential measuring probes 2-2 are respectively located on the upper and lower surfaces of the friction material 18 after the separation described in step (8), and the signal sampling position adjustment ranges in the vertical and horizontal directions are uniform. 0 to 100mm, respectively measure the magnitude and polarity of the electrostatic potentials on the surfaces of the two groups of friction materials 18 after they are separated;

(10) Save, analyze and process the above-mentioned measured values by computer, and calculate the multi-factor joint effect simulation test results of electrostatic dynamic potential.

As above, the utility model can be better realized.

Claims (5)

1, a kind of multifactor combination effect analog experiment apparatus of electrostatic dynamic current potential, it is characterized in that: it is interconnected by simulating chamber, data acquisition and disposal system forms, described simulating chamber comprises operating room, support and frame, described operating room is installed between support and the frame, its top is equipped with mechanical arm, inner bottom surface is provided with temperature probe and heating tube, and medial surface is provided with moisture absorption box and hygrometric probe; Variable-frequency motor, support controller are installed on the described support, described support controller is connected with temperature probe, heating tube, moisture absorption box, hygrometric probe, variable-frequency motor respectively, described variable-frequency motor is connected with the spin friction dish that is installed on the bottom, operating room by turning axle, described spin friction dish top is equipped with the friction of rest dish relatively, the friction of rest dish is fixedlyed connected with application of force pallet lower end by application of force axle, place application of force counterweight in the described application of force pallet, and fixedly connected with the apparatus for controlling of lifting on being installed in described frame in application of force pallet upper end; Described data acquisition and disposal system comprise electrostatic dynamic current potential measuring sonde, main frame, computing machine, and described electrostatic dynamic current potential measuring sonde is installed in respectively on application of force axle and the described mechanical arm, and interconnects successively with main frame, computing machine.

2, according to the multifactor combination effect analog experiment apparatus of the described a kind of electrostatic dynamic current potential of claim 1, it is characterized in that: described spin friction dish be shaped as disc, described friction of rest dish be shaped as non-disc, comprise opening shape, bar shaped, triangle, trilobal, the shape of described friction material is corresponding with the shape of each spin friction dish, friction of rest dish respectively.

3, according to the multifactor combination effect analog experiment apparatus of the described a kind of electrostatic dynamic current potential of claim 1, it is characterized in that: described apparatus for controlling of lifting comprises head sheave on the pallet, steel cable, frame, frame pulley blocks, worm screw, rocking handle, described application of force pallet upper and lower side is connected by the pulley base of head sheave on thru-bolt and the pallet, steel cable one end is connected with frame, its other end is connected with described worm screw by head sheave, frame pulley blocks on the pallet, worm screw is installed in described support rear portion, and described rocking handle is installed in the end of worm screw.

4, according to the multifactor combination effect analog experiment apparatus of the described a kind of electrostatic dynamic current potential of claim 1, it is characterized in that: the range of lift of described apparatus for controlling of lifting is 0～200mm, and each described electrostatic dynamic current potential measuring sonde is 0～100mm in signal sampling position adjustment range vertical, horizontal direction.

5, according to the multifactor combination effect analog experiment apparatus of the described a kind of electrostatic dynamic current potential of claim 1, it is characterized in that: the temperature controlling range of described operating room is 20～60 ℃, and the humidity range of control is 20%～90%.

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