A thermostat for testing the pulse frequency of a pulse-wave passive probe

Abstract

The application discloses a thermostat for testing the pulse frequency of a pulse wave passive detector, which comprises a thermostat unit, wherein the thermostat unit comprises a thermostat box and a cover hingedly installed on the upper portion of the thermostat box, the inside of the thermostat box is provided with cavity one and cavity two, and the top of the cover is provided with a temperature control module; the inside of the cavity one is provided with a concrete assembly unit for placing concrete and the pulse wave passive detector, and the bottom of the concrete assembly unit is provided with an adjusting unit; the four partition fences are used to divide five spaces, so that the pulse wave passive detector can be surrounded by concrete for testing, the actual application environment can be simulated, more practical data can be obtained, the thickness of the space can be adjusted through the adjusting unit, the thickness of the concrete surrounding can be adjusted, the concrete surrounding with different thicknesses can be realized, and the pulse wave passive detector can be flexibly tested.

Description

Technical Field

[0001] This invention relates to the field of constant temperature testing of pulsator detectors, and in particular to a constant temperature chamber for testing the pulsator frequency of a passive pulsator detector. Background Technology

[0002] The Pulse passive detector can be installed inside a concrete structure to monitor the temperature changes inside the concrete in real time and transmit signals to an external signal receiving device. Before the Pulse passive detector is used in a concrete structure, the signal receiving effect and temperature detection accuracy of the Pulse passive detector need to be tested and verified in advance. During the testing process, a constant temperature structure is required to test the data of the Pulse passive detector. For this purpose, we propose a constant temperature chamber for testing the Pulse frequency of the Pulse passive detector. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this section, the abstract and title of the invention. Such simplifications or omissions shall not be used to limit the scope of the present invention.

[0004] In view of the problems existing in the prior art, the present invention is proposed.

[0005] Therefore, the purpose of this invention is to provide a constant temperature chamber for testing the pulsator frequency of a passive pulsator detector, comprising: a constant temperature unit, the constant temperature unit including a constant temperature chamber body and a cover hinged to the upper part of the constant temperature chamber body, the constant temperature chamber body having a first cavity and a second cavity inside, and a temperature control module being provided on the top of the cover; the first cavity having a concrete assembly unit for placing concrete and a passive pulsator detector inside, and an adjustment unit being provided at the bottom of the concrete assembly unit.

[0006] As a preferred embodiment of the constant temperature chamber for testing the pulsator frequency of the passive pulsator detector according to the present invention, the concrete assembly unit includes a concrete loading frame fixedly installed inside the cavity, and a cover plate is movably installed on the top of the concrete loading frame. The interior of the concrete loading frame is provided with four circumferentially distributed partition bars, which divide the interior space of the concrete loading frame into five parts, including one zone space and four zone spaces. The inner bottom of the concrete loading frame is provided with four circumferentially distributed groove plates, and positioning rods are slidably embedded inside the groove plates. Four silicone bags are fixedly installed inside the cover plate, and the upper ports of the silicone bags are open. Each silicone bag is movably placed inside the zone space.

[0007] As a preferred embodiment of the constant temperature chamber for testing the pulsator frequency of the passive pulsator detector according to the present invention, the partition fence includes a main rod fixedly sleeved on the outer surface of the slotted plate. A plurality of horizontal bars are fixedly installed on one side of the main rod, and a plurality of assembly slots are opened on the other side of the main rod, which are also arranged in a straight line at equal intervals. The horizontal bars and the assembly slots are vertically distributed, and the plurality of horizontal bars and the plurality of assembly slots are staggered.

[0008] As a preferred embodiment of the constant temperature chamber for testing the pulsator frequency of the passive pulsator detector described in this invention, the adjustment unit includes a turntable rotatably disposed at the bottom of the concrete loading frame, and the turntable has four arc-shaped grooves equidistantly distributed in a circle inside, each of the positioning rods being slidably embedded in the arc-shaped groove. A worm gear is also concentrically fixedly installed on the lower end face of the turntable, and a worm gear is rotatably inserted through the concrete loading frame on the outer side of the worm gear. A braking component and a rotation component are provided between the worm gear and the constant temperature chamber.

[0009] As a preferred embodiment of the constant temperature chamber for testing the pulsator frequency of the passive pulsator detector described in this invention, the worm gear extends rotatably to the outside of the constant temperature chamber. The braking component includes an outer gear plate fixedly sleeved on the outer surface of the worm gear. A limiting cylinder is fixedly installed on the outer side of the outer gear plate corresponding to the outer surface of the constant temperature chamber. A pull rod is axially slidably provided inside the limiting cylinder. A collar slidably disposed inside the limiting cylinder is fixedly sleeved on the outer surface of the pull rod. The axis of the limiting cylinder intersects perpendicularly with the axis of the worm gear. A spring is provided between the end of the collar away from the outer gear plate and the limiting cylinder. A beveled portion is provided at the end of the pull rod near the outer gear plate. A rotating wheel for rotation is also fixedly sleeved on the outside of the worm gear.

[0010] As a preferred embodiment of the constant temperature chamber for testing the pulsator frequency of the passive pulsator detector according to the present invention, the rotating component includes a cavity formed in the inner wall of the constant temperature chamber, a tension spring is fixedly installed at both ends of the cavity, and a slider is fixedly installed at the end of each tension spring near the worm gear, which is slidably embedded in the cavity. A rope is fixedly installed between the worm gear and each slider.

[0011] In a preferred embodiment of the constant temperature chamber for testing the pulsator frequency of the passive pulsator detector described in this invention, the upper and lower ends of the slider are both embedded with rolling balls.

[0012] As a preferred embodiment of the constant temperature chamber for testing the pulsator frequency of the passive pulsator detector according to the present invention, the constant temperature chamber is further provided with a leveling unit. There are two leveling units, which are located on both sides of the cavity. The leveling unit includes a touch rod that is axially slidably inserted into the interior of the constant temperature chamber. A spring is fixedly installed between the bottom of the touch rod and the constant temperature chamber. The left and right side walls of the cavity are rotatably provided with connecting rods. A protruding tooth is fixedly provided on the side of the connecting rod near the touch rod. A plurality of toothed grooves are opened on the outer wall of the touch rod in a straight line and are movably engaged with the toothed grooves. A ball hammer is fixedly installed on the end of the connecting rod away from the touch rod.

[0013] In a preferred embodiment of the constant temperature chamber for testing the pulsator frequency of the passive pulsator detector as described in this invention, the diameter of the ball hammer is greater than the width of the connecting rod.

[0014] As a preferred embodiment of the constant temperature chamber for testing the pulsator frequency of the passive pulsator detector described in this invention, the top of the contact rod is provided with a straight groove cavity, and the protruding tooth is movably engaged with the straight groove cavity.

[0015] The beneficial effects of this invention are as follows: by dividing five spaces into four partition fences, the Pulse passive detector can be surrounded by concrete for testing, simulating the actual application environment and obtaining more realistic data. Moreover, the thickness of the space can be adjusted by the adjustment unit, thereby adjusting the thickness of the concrete enclosure and achieving different concrete enclosure thicknesses, allowing for flexible testing of the Pulse passive detector. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0017] Figure 1 A schematic diagram of the overall structure of a constant temperature chamber for testing the pulsator frequency of a passive pulsator detector according to an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the overall structure of the constant temperature chamber for testing the pulsator frequency of a passive pulsator detector according to an embodiment of the present invention from another perspective.

[0019] Figure 3 A schematic diagram of the concrete assembly unit structure of the constant temperature chamber for testing the pulsator frequency of a passive pulsator detector according to an embodiment of the present invention.

[0020] Figure 4A schematic diagram of the partition grid structure of a constant temperature chamber for testing the pulsator frequency of a passive pulsator detector according to an embodiment of the present invention.

[0021] Figure 5 A schematic diagram of the spatial structure distribution of area A and area B of the constant temperature chamber for testing the pulsator frequency of a passive pulsator detector according to an embodiment of the present invention.

[0022] Figure 6 A schematic diagram of the crossbar and assembly slot structure of the constant temperature chamber for testing the pulsator frequency of a passive pulsator detector according to an embodiment of the present invention.

[0023] Figure 7 A schematic diagram of the adjustment unit structure of the constant temperature chamber for testing the pulsator frequency of a passive pulsator detector according to an embodiment of the present invention;

[0024] Figure 8 A schematic diagram of the cavity structure of a constant temperature chamber for testing the pulsator frequency of a passive pulsator detector according to an embodiment of the present invention.

[0025] Figure 9 The constant temperature chamber for testing the pulsator frequency of a passive pulsator detector, as described in one embodiment of the present invention. Figure 8 Enlarged view of point A in the middle;

[0026] Figure 10 A schematic diagram of the external gear disk and tie rod structure of a constant temperature chamber for testing the pulsator frequency of a passive pulsator detector according to an embodiment of the present invention;

[0027] Figure 11 A schematic diagram showing the positional distribution of the leveling unit structure of the constant temperature chamber for testing the pulsator frequency of a passive pulsator detector according to an embodiment of the present invention.

[0028] Figure 12 This is a schematic diagram of the convex teeth, tooth grooves, and straight groove cavity structure of a constant temperature chamber for testing the pulsator frequency of a passive pulsator detector according to an embodiment of the present invention. Detailed Implementation

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0032] Example 1

[0033] Reference Figures 1-7 This embodiment provides a constant temperature chamber for testing the pulsator frequency of a passive pulsator detector, including: a constant temperature unit 100, the constant temperature unit 100 including a constant temperature chamber body 101 and a cover 102 hinged to the upper part of the constant temperature chamber body 101, the constant temperature chamber body 101 is provided with a first cavity 103 and a second cavity 104, and the top of the cover 102 is provided with a temperature control module, which is a heating component in the prior art, that is, it can control the temperature inside the constant temperature chamber body 101; the first cavity 103 is provided with a concrete assembly unit 200 for placing concrete and a passive pulsator detector, and the bottom of the concrete assembly unit 200 is provided with an adjustment unit 300.

[0034] Furthermore, the concrete assembly unit 200 includes a concrete loading frame 201 fixedly installed inside the cavity 103, and a cover plate 202 is movably installed on the top of the concrete loading frame 201. The interior of the concrete loading frame 201 is provided with four circumferentially distributed partitions 203, which divide the internal space of the concrete loading frame 201 into five parts, including one A-zone space 205 and four B-zone spaces 206. The A-zone space 205 is used to place the passive pulsator detector to be tested, while the B-zone spaces 206 can hold concrete to simulate the actual application environment. The bottom side is provided with four U-shaped groove plates 207 distributed circumferentially, and a positioning rod 208 is slidably embedded inside the U-shaped groove plates 207. Four silicone bags 204 are fixedly installed inside the cover plate 202, and the upper port of the silicone bags 204 is in an open state. Each silicone bag 204 is movably placed inside the space 206 in zone B. Concrete is added into the silicone bags 204. Through the deformation ability of the silicone bag 204 material itself, after the silicone bag 204 loaded with concrete enters the space 206 in zone B, it can fill the space inside the space 206 in zone B in combination with the fluidity of the concrete, simulating the situation of concrete surrounding the passive detector.

[0035] Furthermore, the partition fence 203 includes a main rod 203a fixedly sleeved on the outer surface of the U-shaped channel plate 207. A number of horizontal bars 203b are fixedly installed on one side of the main rod 203a and are distributed in a straight line at equal intervals. A number of assembly slots 203c are opened on the other side of the main rod 203a and are distributed in a straight line at equal intervals. The horizontal bars 203b and the assembly slots 203c are vertically distributed and are staggered. When the four partition fences 203 are assembled together, they can expand or shrink the four B-zone spaces 206 simultaneously. The horizontal bars 203b can provide stable support for the silicone bag 204 filled with concrete.

[0036] Furthermore, the adjustment unit 300 includes a turntable 302 rotatably mounted at the bottom of the concrete loading frame 201. The turntable 302 has four circumferentially distributed arc-shaped grooves 303 inside, wherein the distances from the two ends of the arc-shaped grooves 303 to the center of the turntable 302 are not equal. Each positioning rod 208 is slidably embedded in the arc-shaped groove 303. A worm gear 304 is also concentrically fixedly mounted on the lower end face of the turntable 302. A worm 301 that rotates through the concrete loading frame 201 is meshed on the outer side of the worm gear 304. A braking component and a rotation component are provided between the worm 301 and the constant temperature chamber 101. Through the joint restriction of the positioning rods 208 by the U-shaped groove plate 207 and the arc-shaped grooves 303, the four positioning rods 208 can move synchronously when the turntable 302 rotates.

[0037] The working principle of the signal test of the simulated concrete-surrounded passive tester is as follows: First, the tester can adjust the size of space 206 in zone B according to the test requirements. Adjusting space 206 in zone B is equivalent to adjusting the amount of concrete filling. During adjustment, the worm gear 301 drives the worm wheel 304 to rotate, causing the turntable 302 to rotate and move the four positioning rods 208 synchronously. During the movement of the positioning rods 208, the four partition fences 203 can contract and change, adjusting the size of space 205 in zone A and space 206 in zone B. After adjustment... After completion, the testers can directly place the Pulse passive tester to be tested in the space 205 of area A, then add fluid concrete into the silicone bag 204, and then put four silicone bags 204 filled with concrete into the space 206 of area B through the cover plate 202. Through the deformation capacity of the silicone bag 204 and the gravity and fluidity of the concrete, the space 206 of area B can be effectively filled. This can simulate the situation of concrete surrounding the Pulse passive tester without contaminating the constant temperature chamber 101 and the Pulse passive tester.

[0038] After assembly, the receiving and transmitting antennas are arranged in cavity 104 and connected to the spectrum analyzer and RF signal source respectively through feed lines. Then, the cover 102 is closed. By using the temperature control module in the prior art, the temperature inside the constant temperature chamber 101 is adjusted multiple times. Then, the changes in the external spectrum analyzer are observed to obtain the data of the temperature change inside the chamber detected by the Pulse passive tester.

[0039] Example 2

[0040] Reference Figures 8-10 This is the second embodiment of the present invention, which is based on the previous embodiment and differs from the previous embodiment in that:

[0041] In this design, the worm gear 301 extends rotatably to the outside of the constant temperature chamber 101. An external gear disk 301f is fixedly sleeved on the outer surface of the worm gear 301. A limiting cylinder 301g is fixedly installed on the outer side of the external gear disk 301f corresponding to the outer surface of the constant temperature chamber 101. A pull rod 301i is axially slidably provided inside the limiting cylinder 301g. A collar that slides inside the limiting cylinder 301g is fixedly sleeved on the outer surface of the pull rod 301i. The axis of the limiting cylinder 301g intersects perpendicularly with the axis of the worm gear 301. A spring 301h is provided between the end of the collar away from the external gear disk 301f and the limiting cylinder 301g. A beveled portion 301j is provided at the end of the pull rod 301i near the external gear disk 301f. A rotating wheel 301k is also fixedly sleeved on the outside of the worm gear 301. The design of the beveled portion 301j allows the pull rod 301i to be locked outside the external gear disk 301f.

[0042] Furthermore, the inner wall of the constant temperature chamber 101 is provided with a cavity 301a corresponding to the outer surface of the worm gear 301. A tension spring 301d is fixedly installed at both ends of the cavity 301a, and a slider 301b is fixedly installed at the end of each tension spring 301d near the worm gear 301, which is slidably embedded inside the cavity 301a. A rope 301e is fixedly installed between the worm gear 301 and each slider 301b. When the worm gear 301 rotates, it can wind up the rope 301e, allowing the tension spring 301a to pull the rope.

[0043] Furthermore, both the upper and lower ends of the slider 301b are embedded with rolling balls 301c. The design of the rolling balls 301c is to reduce the friction between the slider 301b and the cavity 301a.

[0044] In this embodiment: to prevent the worm gear 301 from being accidentally touched by others during the test and affecting the test data, the pull rod 301i needs to be pulled first when rotating the worm gear 301 to remove the oblique part 301j from restricting the external gear plate 301f. Only then can the worm gear 301 be rotated by the dial wheel 301k.

[0045] During the rotation of the worm gear 301, the winding of the rope 301e pulls the slider 301b, causing the tension spring 301d to stretch. After the later time is completed, when the material inside the concrete assembly unit 200 is removed, the pull rod 301i can be pulled out directly. Through the elastic force of the tension spring 301d, the worm gear 301 is reversed and reset, which allows the concrete assembly unit 200 to be reset to its initial state, replacing manual reverse reset.

[0046] Example 3

[0047] Reference Figure 11 and Figure 12 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but differs from the previous embodiment in that: the constant temperature chamber 101 is further provided with leveling units 400. There are two leveling units 400, located on both sides of the cavity 103. Each leveling unit 400 includes a contact rod 403 axially slidably inserted into the constant temperature chamber 101. A second spring 404 is fixedly installed between the bottom of the contact rod 403 and the constant temperature chamber 101. Both the left and right sidewalls of the cavity 103 can rotate. A connecting rod 401 is provided, and a protruding tooth 405 is fixedly provided on the side of the connecting rod 401 near the contact rod 403. Several toothed grooves 406 are provided on the outer wall of the contact rod 403 in a straight line and are equidistantly distributed. The protruding tooth 405 is movably engaged with the toothed grooves 406. A ball hammer 402 is fixedly installed on the end of the connecting rod 401 away from the contact rod 403. When the cover 102 is closed, it can push the contact rod 403 downward, so that the connecting rod 401 and the ball hammer 402 swing continuously, thereby striking the upper surface of the cover plate 202.

[0048] Furthermore, the diameter of the hammer 402 is greater than the width of the connecting rod 401. This is to ensure that the hammer 402 can contact the cover plate 202 first during its descent, so that the hammer 402 can effectively strike the cover plate 202.

[0049] Furthermore, a straight groove cavity 407 is provided through the top of the contact rod 403, and the protruding tooth 405 is in movable cooperation with the straight groove cavity 407. When the straight groove cavity 407 contacts the protruding tooth 405, the connecting rod 401 will not be lifted.

[0050] In this embodiment: considering that after concrete is poured into the silicone bag 204, there will be a large number of air bubbles inside, resulting in the concrete not being dense. In actual construction sites, concrete needs to be leveled and air bubbles removed after pouring. Therefore, in this solution, when the cap 102 is closed, the contact rod 403 can be pushed downward. During the pushing process, the connecting rod 401 swings up and down continuously through the engagement of the groove 406 and the protrusion 405. Each swing can hammer the cover plate 202 through the ball hammer 402. The vibration force generated by the hammer is transmitted to the concrete, which can accelerate the destruction and elimination of air bubbles inside the concrete, making the Pulse passive tester closer to the testing environment of actual construction applications.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A constant temperature chamber for testing the pulsator frequency of a passive pulsator detector, characterized in that: include: The constant temperature unit (100) includes a constant temperature chamber (101) and a cover (102) hinged to the upper part of the constant temperature chamber (101). The constant temperature chamber (101) is provided with a cavity one (103) and a cavity two (104) inside, and a temperature control module is provided on the top of the cover (102). The cavity 1 (103) is provided with a concrete assembly unit (200) for placing concrete and a pulse passive detector, and the bottom of the concrete assembly unit (200) is provided with an adjustment unit (300). The concrete assembly unit (200) includes a concrete loading frame (201) fixedly installed inside the cavity (103), and a cover plate (202) is movably installed on the top of the concrete loading frame (201). The interior of the concrete loading frame (201) is provided with four circumferentially distributed partition fences (203), which divide the interior space of the concrete loading frame (201) into five parts, including an A-zone space (205) and four B-zone spaces (206). The bottom inner side of the concrete loading frame (201) is provided with four circumferentially distributed U-shaped groove plates (207), and a positioning rod (208) is slidably embedded inside the U-shaped groove plates (207). Four silicone bags (204) are fixedly installed inside the cover plate (202), and the upper port of the silicone bags (204) is open. Each silicone bag (204) is movably placed inside the B-zone space (206). The partition fence (203) includes a main rod (203a) fixedly sleeved on the outer surface of the U-shaped groove plate (207). A number of horizontal bars (203b) are fixedly installed on one side of the main rod (203a) and a number of assembly slots (203c) are provided on the other side of the main rod (203a). The horizontal bars (203b) and the assembly slots (203c) are vertically distributed and the horizontal bars (203b) and the assembly slots (203c) are staggered.

2. The constant temperature chamber for testing the pulsator frequency of a passive pulsator detector according to claim 1, characterized in that: The adjustment unit (300) includes a turntable (302) rotatably disposed at the bottom of the concrete loading frame (201), and the turntable (302) has four arc-shaped grooves (303) equidistantly distributed in a circle inside. Each positioning rod (208) is slidably embedded in the arc-shaped groove (303). A worm wheel (304) is also concentrically fixedly installed on the lower end face of the turntable (302), and a worm (301) rotatably passes through the concrete loading frame (201) on the outer side of the worm wheel (304). A braking component and a rotation component are provided between the worm (301) and the constant temperature chamber (101).

3. The constant temperature chamber for testing the pulsator frequency of a passive pulsator detector according to claim 2, characterized in that: The worm gear (301) extends rotatably to the outside of the constant temperature chamber (101). The braking component includes an outer gear disc (301f) fixedly sleeved on the outer surface of the worm gear (301). A limiting cylinder (301g) is fixedly installed on the outer side of the outer gear disc (301f) corresponding to the outer surface of the constant temperature chamber (101). A pull rod (301i) is axially slidably provided inside the limiting cylinder (301g). A sliding rod (301i) is fixedly sleeved on the outer surface of the pull rod (301i) and slidably provided inside the limiting cylinder (301g). The limiting cylinder (301g) has an inner collar, the axis of which intersects perpendicularly with the axis of the worm (301). A spring (301h) is provided between the end of the collar away from the outer gear plate (301f) and the limiting cylinder (301g). The pull rod (301i) has a beveled portion (301j) at the end near the outer gear plate (301f). A rotating wheel (301k) is also fixedly sleeved on the outside of the worm (301).

4. The constant temperature chamber for testing the pulsator frequency of a passive pulsator detector according to claim 3, characterized in that: The rotating component includes a cavity (301a) formed in the inner wall of the constant temperature chamber (101). A tension spring (301d) is fixedly installed at both ends of the cavity (301a), and a slider (301b) is fixedly installed at the end of each tension spring (301d) near the worm (301) and is slidably embedded in the cavity (301a). A rope (301e) is fixedly installed between the worm (301) and each slider (301b).

5. The constant temperature chamber for testing the pulsator frequency of a passive pulsator detector according to claim 4, characterized in that: Both ends of the slider (301b) are fitted with rolling balls (301c).

6. The constant temperature chamber for testing the pulsator frequency of a passive pulsator detector according to claim 5, characterized in that: The constant temperature chamber (101) is also provided with a leveling unit (400). There are two leveling units (400) located on both sides of the cavity (103). The leveling unit (400) includes a touch rod (403) that is axially slidably inserted into the constant temperature chamber (101). A spring (404) is fixedly installed between the bottom of the touch rod (403) and the constant temperature chamber (101). The left and right side walls of the cavity (103) are rotatably provided with connecting rods (401). A tooth (405) is fixedly provided on the side of the connecting rod (401) near the touch rod (403). A number of toothed grooves (406) are opened on the outer wall of the touch rod (403) in a straight line and are equidistantly distributed. The tooth (405) is movably engaged with the toothed groove (406). A ball hammer (402) is fixedly installed on the end of the connecting rod (401) away from the touch rod (403).

7. The constant temperature chamber for testing the pulsator frequency of a passive pulsator detector according to claim 6, characterized in that: The diameter of the hammer (402) is greater than the width of the connecting rod (401).

8. The constant temperature chamber for testing the pulsator frequency of a passive pulsator detector according to claim 7, characterized in that: The top of the contact rod (403) is provided with a straight groove cavity (407), and the protruding tooth (405) is in movable cooperation with the straight groove cavity (407).

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