Measuring device for needle-free injection jet flow pressure and measuring method thereof
A measuring device and needle-free injection technology, applied in the field of pressure measurement, can solve the problems of high frequency force sensor being expensive and difficult to obtain, and achieve the effects of simple structure, small damping and high measurement accuracy
Active Publication Date: 2013-09-25
SOUTHEAST UNIV
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Problems solved by technology
Jet pressure is a high-frequency signal, which requires the measurement frequency of the force sensor to adapt to it. However, ordinary force sensors can only measure low-frequency force signals, and high-frequency force sensors are quite expensive and difficult to obtain.
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[0024] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0025] Such as figure 1 As shown, the needle-free injection jet pressure measurement device of the present invention includes a support 1 , an elastic cantilever beam 2 , a mass 5 , an acceleration sensor 4 and a syringe 6 . One end of the cantilever beam 2 is fixedly connected to the bracket 1 , and the other end of the cantilever beam 2 is fixedly connected to the side of the mass block 5 . The cantilever beam 2 can be forced to vibrate because of its elasticity. The acceleration sensor 4 is fixedly connected to the bottom of the mass block 5 , the injector 6 is located above the mass block 5 , and the axis of the nozzle of the injector 6 is perpendicular to the top surface of the mass block 5 .
[0026] Further, there are two cantilever beams 2, and the two cantilever beams 2 are parallel to each other and are in the same vertical plane...
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The invention discloses a measuring device for needle-free injection jet flow pressure. The measuring device for the needle-free injection jet flow pressure comprises a support, a cantilever beam with elasticity, a mass block, an acceleration sensor and an injector. One end of the cantilever beam is fixedly connected to the support, the other end of the cantilever beam is fixedly connected to the side portion of the mass block, the acceleration sensor is fixedly connected to the bottom of the mass block, the injector is located above the mass block, and the axis of a nozzle of the injector is perpendicular to the top face of the mass block. The measuring device is simple in structure and low in cost. The acceleration sensor is used for converting accelerated speed to jet flow impact force, the measuring frequency of the acceleration sensor is very high, and the requirement for measuring the high-frequency jet flow impact force can be completely met. In addition, the invention provides a measuring method of the measuring device for the needle-free injection jet flow pressure. The measuring method of the measuring device for the needle-free injection jet flow pressure is simple and easy to operate, and can meet the requirement for measuring the high-frequency jet flow impact force.
Description
technical field [0001] The invention belongs to the field of pressure measurement, and in particular relates to a needle-free injection jet pressure measurement device and a measurement method thereof. Background technique [0002] Needle-free injection is a brand-new injection method, which can be used for intradermal, subcutaneous and other parts of the drug without using the needle of a traditional syringe. The principle of needle-free injection is to penetrate the epidermis through a high-pressure jet, and send the liquid medicine into the intradermal or subcutaneous parts. Jet pressure is the most critical factor in determining the success of needle-free injection. [0003] At present, the method used to measure the pressure of the needle-free injection jet at home and abroad is to measure the impact force of the jet and then convert it into the pressure of the jet. Jet pressure is a high-frequency signal, which requires the measurement frequency of the force sensor t...
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IPC IPC(8): G01L23/00
Inventor 王兴松沈冬华
Owner SOUTHEAST UNIV