Search

CN-122016087-A - Automatic calibration equipment for constant temperature tank and use method

CN122016087ACN 122016087 ACN122016087 ACN 122016087ACN-122016087-A

Abstract

The invention relates to the technical field of thermostatic bath calibration, and particularly discloses automatic thermostatic bath calibration equipment which comprises a rack, a first moving arm, a second moving arm, a first temperature sensor at the execution tail end of the first moving arm, a second temperature sensor at the execution tail end of the second moving arm, a position detection unit for detecting position information of the first temperature sensor and/or the second temperature sensor, and a control system, wherein the control system is connected with the first moving arm, the second moving arm, the first temperature sensor, the second temperature sensor and the position detection unit, and controls the first temperature sensor to move to a typical temperature measuring point for temperature measurement and receives the detected temperature data. A method of using an automatic calibration device for a thermostat includes controlling a first temperature sensor to move to a typical temperature measurement point for temperature measurement and receiving detected temperature data. This scheme is used for can the different shapes of self-adaptation and size constant temperature tank and can reduce the complex operation degree.

Inventors

  • YIN SHI
  • ZHANG YUECHENG

Assignees

  • 易优凯(廊坊)技术开发有限公司

Dates

Publication Date
20260512
Application Date
20260413

Claims (10)

  1. 1. An automatic calibration device for a thermostatic bath, comprising a frame, characterized in that it also comprises: the first moving arm is arranged on the rack and can drive the execution end of the first moving arm to move in space; a second moving arm mounted on the frame, capable of being used for adjusting the position of the execution end thereof in space; a first temperature sensor mounted at an execution end of the first moving arm; A second temperature sensor mounted at an execution end of the second moving arm; a position detection unit for detecting position information of the first temperature sensor and/or the second temperature sensor; the control system is connected with the first moving arm, the second moving arm, the first temperature sensor, the second temperature sensor and the position detection unit, and is used for controlling the first moving arm to drive the first temperature sensor to move to a typical temperature measuring point for temperature measurement and receiving temperature data detected by the first temperature sensor and the second temperature sensor.
  2. 2. The automatic calibration device for a thermostat of claim 1, wherein the first moving arm and the second moving arm are articulated arms, or The first moving arm comprises a first lifting module, a first linear moving module and a rotary driving module, wherein the first lifting module is used for driving the first temperature sensor to lift, the first linear moving module is used for driving the first temperature sensor to linearly move in a horizontal plane, and the rotary driving module is used for driving the first temperature sensor to rotate around a Z axis; The second movable arm is rotatably connected to the frame and can rotate around the Z axis, the second movable arm comprises a second lifting module and a second linear movement module, the second lifting module is used for driving the second temperature sensor to lift, and the second linear movement module is used for driving the second temperature sensor to linearly move in a horizontal plane.
  3. 3. The automatic oven calibration device according to claim 2, wherein the first and second linear movement modules each comprise: A swing arm; the rack is fixed on the swing arm along the length direction of the swing arm; the sliding plate is connected to the swing arm in a sliding manner and can slide along the length direction of the swing arm; The linear driving motor is fixed on the sliding plate; The gear is arranged on the output shaft of the linear driving motor and meshed with the rack; The swing arm of the first moving arm is arranged at the output end of the rotary driving module, and the swing arm of the second moving arm is rotatably connected to the frame.
  4. 4. The automatic calibration device for a thermostatic bath according to claim 2, wherein the position detection unit includes: The first angle detection element is arranged on the output shaft of the rotary driving module and is used for detecting the rotation angle of the first movable arm; The first linear displacement detection element is arranged on the first linear movement module and is used for detecting the linear displacement of the first linear movement module; The first lifting displacement detection element is arranged on the first lifting module and is used for detecting the lifting displacement of the output end of the first lifting module; The second angle detection element is arranged on the second movable arm and is used for detecting the rotation angle of the second movable arm; the second linear displacement detection element is arranged on the second linear movement module and is used for detecting the linear displacement of the second linear movement module; the second lifting displacement detection element is arranged on the second lifting module and is used for detecting the lifting displacement of the output end of the second lifting module; And the control system calculates and stores the space coordinates of the first temperature sensor and the second temperature sensor according to the rotation angle, the linear displacement and the lifting displacement detected by each detection element.
  5. 5. The automatic oven calibration device of claim 1, wherein the housing comprises a support bar and a plurality of support legs connected to the support bar.
  6. 6. The automatic calibration device for a thermostatic bath according to claim 5, wherein all the supporting legs are screwed to the supporting rod, and the joints of all the supporting legs and the supporting rod are arranged in sequence in the height direction, and all the supporting legs can be rotated to the same radial position as the supporting rod to form a stacked posture.
  7. 7. The automatic oven calibration device of claim 1, wherein the control system is further configured to: the first moving arm is controlled to drive the first temperature sensor to sequentially move to a plurality of characteristic points of a working area of the constant temperature tank in a manual teaching mode, and position information of each characteristic point is recorded through a position detection unit, wherein the characteristic points are points on side walls of the constant temperature tank or corner points between adjacent side walls; And the control system determines a plurality of typical temperature measuring points corresponding to the upper horizontal plane and the lower horizontal plane of the constant temperature tank and space coordinates of a central point of a working area according to the recorded position information of the characteristic points and the selected shape of the constant temperature tank.
  8. 8. The automatic oven calibration device of claim 7, wherein the control system determines the spatial coordinates of a typical temperature measurement point by: according to the position information of the characteristic points and the selected shape of the thermostatic bath, calling a corresponding typical temperature measuring point layout rule, and determining the space coordinates of a plurality of typical temperature measuring points of an upper horizontal plane and a lower horizontal plane; Or calculating the size parameter of the constant temperature groove according to the position information of the characteristic points and the selected constant temperature groove shape, and matching with a built-in typical temperature measuring point database to determine the corresponding spatial coordinates of the typical temperature measuring points.
  9. 9. The automatic calibration device for a thermostat according to claim 7, wherein for a circular thermostat, the characteristic points include three side wall points located on an upper horizontal plane of the work area and any point on a lower horizontal plane, and for a polygonal thermostat, the characteristic points include all corner points located on the upper horizontal plane and any point on the lower horizontal plane.
  10. 10. A method of using a thermostat automatic calibration device as claimed in any one of claims 1 to 9, comprising the steps of: Controlling the first moving arm to drive the first temperature sensor to move to a typical temperature measuring point for temperature measurement; and receiving temperature data detected by the first temperature sensor and the second temperature sensor.

Description

Automatic calibration equipment for constant temperature tank and use method Technical Field The invention relates to the technical field of thermostatic bath calibration, in particular to automatic thermostatic bath calibration equipment and a using method thereof. Background The constant temperature tank uses liquid as heat conducting medium, reaches set temperature through the action of the temperature control system and the stirring or jet device, keeps the temperature of the internal working area stable and uniform, and is mainly used as constant temperature equipment required by verification and calibration of various thermometers or other metering appliances. The technical properties of the thermostatic bath include temperature uniformity and temperature fluctuation. The temperature fluctuation test is to insert a thermometer into the 1/2 depth position of the center point of the working area, read the temperature value of the thermometer for multiple times within a certain time, calculate the difference value of the temperature values read each time, and judge the fluctuation according to the difference value. The uniformity test is more complicated, two thermometers are needed to be used for temperature measurement, one thermometer is used as a fixed thermometer to be inserted into the 1/2 depth of the center point of the working area, the other thermometer is used as a movable thermometer to sequentially measure typical position temperature measuring points uniformly distributed on the upper horizontal plane of the working area and the lower horizontal plane of the working area, and the typical position temperature measuring points are, for example, cylindrical constant temperature tanks, four temperature measuring points (a, b, c, d points) uniformly distributed along the edge of the upper horizontal plane of the working area and the positions of test points of four temperature measuring points (e, f, g, h) on the lower horizontal plane of the working area, which correspond to the four temperature measuring points of the upper horizontal plane of the working area vertically. Because the position of the movable thermometer needs to be changed frequently, the conventional measuring process is usually carried out by a hand-held thermometer and the thermometer is moved according to the position of the temperature measuring point, the method has the problems that the temperature measuring point is inaccurate due to manual operation of the thermometer, the measured value cannot truly reflect the uniformity of the temperature field, the measured data is recorded manually, the data is more, and the efficiency is low. The prior art presents some devices and methods for assisting the calibration of thermostats, which to some extent improve the calibration efficiency, but still present respective limitations. For example, a thermostat temperature performance test system of the prior patent publication CN221404536U discloses a fixed thermometer fixedly installed by a first bracket and a first clamp, a movable thermometer is supported by a second bracket, and the movable thermometer is switched at a typical position temperature measuring point by manually rotating the second bracket and manually adjusting the height of the movable thermometer. However, the positioning of the mobile thermometer in this scheme all relies on manual operation at every turn, needs to be repeatedly manually screwed and adjusted in the calibration process, and degree of automation is low, and complex operation, and manual operation is difficult to guarantee the accuracy and the repeatability of every turn positioning. According to the rapid calibration method for the temperature of the constant temperature tank disclosed by the patent publication No. CN113654673A, the high-position platinum resistance thermometer and the low-position platinum resistance thermometer are driven to synchronously rotate by the rotating platform and the rotating control mechanism, so that the high-position platinum resistance thermometer and the low-position platinum resistance thermometer are automatically switched as typical position temperature measuring points of the mobile thermometer in the corresponding horizontal plane, and the degree of automation and the detection efficiency are improved to a certain extent. However, the thermometer mounting position of this technique is fixed on the toothed disc, and its distance from the center point is not adjustable, so it is only applicable to the calibration of circular thermostats of a specific diameter. However, in practical applications, thermostats have various forms of construction, usually circular, quadrangular (rectangular/square), and even possibly polygonal, and this technique is not applicable to thermostats of non-circular or varying dimensions, and has poor versatility. The patent publication No. CN118603362A discloses a small-sized thermostatic bath calibration method, which adjusts the vert