CN211453846U - True sensitivity measuring device - Google Patents
True sensitivity measuring device Download PDFInfo
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- CN211453846U CN211453846U CN201922120629.0U CN201922120629U CN211453846U CN 211453846 U CN211453846 U CN 211453846U CN 201922120629 U CN201922120629 U CN 201922120629U CN 211453846 U CN211453846 U CN 211453846U
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Abstract
The utility model discloses a true sensitivity measuring device, measuring device includes discharge unit, return circuit consumption energy measuring unit and residual energy measuring unit, specifically includes: the device comprises a high-voltage source, a charging resistor, a three-phase switch, a non-inductive resistor, a high-voltage capacitor, an electric spark discharge device, a current probe, a voltmeter and an oscilloscope. Through the utility model discloses a device structural design for can accomplish static sensitivity appearance spark discharge's true energy value through this device and measure.
Description
Technical Field
The utility model belongs to the energy measurement field especially relates to a measuring device of true sensitivity energy of electrostatic discharge.
Background
At present, the method for carrying out electrostatic sensitivity test at home and abroad is to use specific conditions in an equivalent circuit for simulating human body electrostatic dischargeElectrostatic energy at 50% probability of ignition (1/2 CV)50 2) Or an electrostatic voltage (V)50) As electrostatic sensitivity of electric initiating explosive device. The standard of America military, MIL-1-23659B (AS), the design and evaluation of electric initiating explosive device, stipulated in the electrostatic discharge test conditions of electric initiating explosive devices, namely the voltage of 25KV +/-500V, the series resistance of 5000 +/-5% omega, the capacitance of 500 +/-5% Pf, and the stipulation is also adopted in the 'electrostatic sensitivity test method of electric initiating explosive devices' formulated by 213 th department of electromechanics in China. The series resistance was defined as a carbonaceous synthetic solid resistance (AH0006-79) of 5 K.OMEGA. + -. 5%. Since the synthesized resistor is nonlinear at high voltage, the resistance decreases with increasing voltage, and after multiple discharges, electrical breakdown occurs inside the resistor, resulting in permanent damage. For the same synthetic resistor, the change of the resistance value causes the change of the discharge time constant, which causes the dislocation of the relation between the test result such as the ignition energy and the time constant, and the change of the resistance value also causes the difference of the electrostatic sensitivity when the synthetic resistor and the fixed resistor are connected in series. Therefore, such resistors cannot be used as elements in standard test lines.
Although the above test method avoids many factors that are not well defined, giving an evaluation of the antistatic ability of the electric initiating explosive device as a whole from the energy of the discharge system makes it possible to rank the degree of sensitivity of the product to electrostatic discharge. However, the 50% ignition energy obtained by the above test method was 1/2CV50 2The total energy stored by the energy storage capacitor is the total energy consumed in a circuit system, and comprises the discharge of a circuit, a series resistor and a switch to gas and the loss of a capacitor under high voltage and high frequency. And not the energy actually consumed on the sample. Therefore, the sensitivity value measured by the sensor is only one relative electrostatic sensitivity. Can not be used as a criterion for establishing safety technical standards.
That is, when the electrostatic discharge energy of the initiating explosive device is measured, the electrostatic sensitivity is expressed by electrostatic energy or voltage at a probability of 50% according to the test method of GJB 5309.14-2004, and the electrostatic sensitivity energy value is roughly calculated, and the real discharge energy of the electrostatic sensitivity meter cannot be quantitatively measured without considering the residual energy of the capacitor and the energy loss in the circuit.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art problem, provide a true sensitivity measuring device for realize the quantitative measurement of the energy of discharging.
The purpose of the utility model is realized through the following technical scheme:
a real sensitivity measuring device comprises a high-voltage source, a charging resistor, a three-phase switch, a non-inductive resistor, a high-voltage capacitor, an electric spark discharging device, a current probe, a voltmeter and an oscilloscope, wherein a first pole of the high-voltage source is connected with one end of the charging resistor, the other end of the charging resistor is connected with a first terminal of the three-phase switch, a second terminal of the three-phase switch is connected with one end of the high-voltage capacitor, and the other end of the high-voltage capacitor is connected with a second pole of the high-voltage source; a third terminal of the three-phase switch is connected with one end of the non-inductive resistor, the other end of the non-inductive resistor is connected with one end of the electric spark discharging device, the other end of the electric spark discharging device is connected with one end of the current probe, and the other end of the current probe is connected with a second pole of the high-voltage source; the voltmeter is connected with the high-voltage capacitor and used for realizing voltage measurement of the high-voltage capacitor; and the oscilloscope is connected with the current probe and is used for realizing current information acquisition of the current probe.
According to a preferred embodiment, when the first terminal and the second terminal of the three-phase switch are conductive, the high-voltage capacitor is in a charging state.
According to a preferred embodiment, when the second terminal and the third terminal of the three-phase switch are conducted, the high-voltage capacitor is in a discharge state.
According to a preferred embodiment, the three-phase switch is a plasma switch.
According to a preferred embodiment, the oscilloscope is configured to perform current collection by using parameters of a 4GHz bandwidth and a 25Gs/s sampling rate.
According to a preferred embodiment, the voltmeter is an electrostatic voltmeter.
The main scheme and the further selection schemes of the utility model can be freely combined to form a plurality of schemes, which are the schemes that can be adopted and claimed by the utility model; and the utility model discloses also can the independent assortment between (each non-conflict selection) selection and between other choices. The technical solutions to be protected by the present invention, which are various combinations that can be known to those skilled in the art based on the prior art and the common general knowledge after understanding the present invention, are not exhaustive herein.
The utility model has the advantages that: through the utility model discloses a device structural design for can accomplish static sensitivity appearance spark discharge's true energy value through this device and measure.
Drawings
FIG. 1 is a schematic diagram of a measurement circuit of the device of the present invention;
the device comprises a high-voltage source 1, a charging resistor 2, a three-phase switch 3, a noninductive resistor 4, a high-voltage capacitor 5, an electric spark discharge device 6, a current probe 7, a voltmeter 8 and an oscilloscope 9.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that, in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Additionally, the utility model discloses it is pointed out that, in the utility model, if do not write out structure, connection relation, positional relationship, power source relation etc. that concretely relates to very much, then the utility model relates to a structure, connection relation, positional relationship, power source relation etc. are technical personnel in the field on prior art's basis, can not learn through creative work.
Example 1:
referring to fig. 1, a real sensitivity measuring device is shown, which comprises a high voltage source 1, a charging resistor 2, a three-phase switch 3, a non-inductive resistor 4, a high voltage capacitor 5, an electric spark discharging device 6, a current probe 7, a voltmeter 8 and an oscilloscope 9.
Preferably, a first pole of the high voltage source 1 is connected to one end of the charging resistor 2, the other end of the charging resistor 2 is connected to a first terminal of the three-phase switch 3, a second terminal of the three-phase switch 3 is connected to one end of the high voltage capacitor 5, and the other end of the high voltage capacitor 5 is connected to a second pole of the high voltage source 1.
Preferably, when the first terminal and the second terminal of the three-phase switch 3 are conducted, the high-voltage capacitor 5 is in a charging state.
Further, the voltmeter 8 is connected with the high-voltage capacitor 5, and is used for realizing voltage measurement of the high-voltage capacitor 5.
Preferably, the third terminal of the three-phase switch 3 is connected to one end of the non-inductive resistor 4, the other end of the non-inductive resistor 4 is connected to one end of the electric spark discharging device 6, the other end of the electric spark discharging device 6 is connected to one end of the current probe 7, and the other end of the current probe 7 is connected to the second pole of the high voltage source 1;
preferably, when the second terminal of the three-phase switch 3 is conducted with the third terminal, the high-voltage capacitor 5 is in a discharging state.
Further, the oscilloscope 9 is connected to the current probe 7, and is configured to acquire current information of the current probe 7.
Preferably, the three-phase switch 3 is a plasma switch. Therefore, when the charging and discharging processes of the high-voltage capacitor 5 are switched, the current oscillation generated during the switching of the loop can be reduced by using the plasma switch 3 and the non-inductive resistor 4.
Preferably, the oscilloscope 9 is configured to perform current collection using parameters of a 25Gs/s sampling rate at a bandwidth of 4 GHz. That is, a 40ps sampling interval can more accurately integrate the energy consumed by the computational loop.
According to a preferred embodiment, the voltmeter 8 is an electrostatic voltmeter 8. The internal resistance of the electrostatic voltmeter 8 is close to infinity, so that the residual energy of the capacitor is prevented from being released through the internal resistance of the voltmeter after the discharge is finished, and the residual voltage of the capacitor can be measured almost without attenuation.
Preferably, the measuring device comprises a discharge unit, a loop consumption energy measuring unit and a residual energy measuring unit.
Preferably, the discharge unit comprises a high voltage source 1, a charging resistor 2, a three-phase switch 3, a non-inductive resistor 4, a high voltage capacitor 5 and an electric spark discharge device 6. The working principle is that a high-voltage source 1 charges a high-voltage capacitor 5 through a three-phase switch 3, and after the high-voltage capacitor 5 is fully charged, the real capacitor storage voltage V is read through an electrostatic voltmeter 81Calculating the initial energy of the high-voltage capacitor
The three-phase switch 3 switches the charging circuit to the discharging circuit to be connected with the non-inductive resistor 4, so that the voltage at two ends of the high-voltage capacitor 5 is transmitted to two ends of a discharging electrode of the electric spark discharging device 6 through the non-inductive resistor 4 to be discharged.
Preferably, the loop consumed energy measuring unit comprises an oscilloscope 9, a current probe 7 and a non-inductive resistor 4. The working principle is that when the electric spark discharge device 6 discharges through the discharge electrode, the discharge loop generates instantaneous current I, and the discharge loop does not haveThe inductive resistor 4 dissipates electrical energy in the form of thermal energy. Collecting instantaneous current I by current probe 7 and oscilloscope 9, and collecting instantaneous current I by non-inductive resistor R, current I and time t according to formula
The energy consumed by the loop is calculated.
Preferably, the residual energy measuring unit comprises a high-voltage capacitor 5 and a voltmeter 8. The voltmeter 8 is used as a measuring device for the residual voltage of the high-voltage capacitor 5, the measured voltage signal is hardly attenuated during measurement, the residual energy of the high-voltage capacitor 5 can be prevented from being consumed due to the internal resistance of the voltmeter as much as possible, and the accurate residual voltage V of the capacitor is obtained2Thereby obtaining the residual energy of the high-voltage capacitor 5
Therefore, the real discharge energy of the spark discharge of the electrostatic sensitivity instrument can be calculated by the following formula:
that is, through the utility model discloses a device structural design for can accomplish electrostatic induction appearance spark discharge's real energy value through this device.
The aforesaid the utility model discloses basic embodiment and each further alternative can the independent assortment in order to form a plurality of embodiments, is the utility model discloses can adopt and claim the embodiment of protection. In the scheme of the utility model, each selection example can be combined with any other basic examples and selection examples at will.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A real sensitivity measuring device is characterized by comprising a high voltage source (1), a charging resistor (2), a three-phase switch (3), a non-inductive resistor (4), a high voltage capacitor (5), an electric spark discharging device (6), a current probe (7), a voltmeter (8) and an oscilloscope (9),
a first pole of the high-voltage source (1) is connected with one end of the charging resistor (2), the other end of the charging resistor (2) is connected with a first terminal of the three-phase switch (3), a second terminal of the three-phase switch (3) is connected with one end of the high-voltage capacitor (5), and the other end of the high-voltage capacitor (5) is connected with a second pole of the high-voltage source (1);
a third terminal of the three-phase switch (3) is connected with one end of the non-inductive resistor (4), the other end of the non-inductive resistor (4) is connected with one end of the electric spark discharge device (6), the other end of the electric spark discharge device (6) is connected with one end of the current probe (7), and the other end of the current probe (7) is connected with a second pole of the high-voltage source (1);
the voltmeter (8) is connected with the high-voltage capacitor (5) and is used for realizing voltage measurement of the high-voltage capacitor (5);
the oscilloscope (9) is connected with the current probe (7) and is used for realizing current information acquisition of the current probe (7).
2. A true sensitivity measurement device according to claim 1, wherein the high voltage capacitor (5) is charged when the first and second terminals of the three-phase switch (3) are conductive.
3. A real sensitivity measuring device according to claim 1, wherein the high voltage capacitor (5) is in a discharge state when the second terminal and the third terminal of the three-phase switch (3) are conductive.
4. A true sensitivity measuring device according to claim 2 or 3, wherein the three-phase switch (3) is a plasma switch.
5. A true sensitivity measurement apparatus according to claim 1, wherein the oscilloscope (9) is configured to perform current acquisition using parameters of 4GHz bandwidth, 25Gs/s sampling rate.
6. A true sensitivity measuring device according to claim 1, characterized in that the voltmeter (8) is an electrostatic voltmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922120629.0U CN211453846U (en) | 2019-12-02 | 2019-12-02 | True sensitivity measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922120629.0U CN211453846U (en) | 2019-12-02 | 2019-12-02 | True sensitivity measuring device |
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| Publication Number | Publication Date |
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| CN211453846U true CN211453846U (en) | 2020-09-08 |
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| CN201922120629.0U Active CN211453846U (en) | 2019-12-02 | 2019-12-02 | True sensitivity measuring device |
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