# US 12,601,853 B2 · Multi-functional measuring instrument > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,601,853 B2 - Document ID: US12601853B2 - Status: Granted - Kind: B2 - Application number: 18/213,890 - Filed: 2023-06-26 - Published: 2024-01-04 - Granted: 2026-04-14 - Earliest claimed: 2022-06-27 - Assignees: Jinhua Maka Technology Co., Ltd - Applicants: Jinhua Maka Technology Co., Ltd - Inventors: Hongzhou Jiang - Web page: https://patentgrep.com/patent/US12601853B2 ## CPC - G01V 3/10: using induction coils - G01D 21/02: Measuring two or more variables by means not covered by a single other subclass - G01S 17/08: for measuring distance only (indirect measurement G01S17/46; active triangulation systems G01S17/48) - G01S 17/86: Combinations of lidar systems with systems other than lidar, radar or sonar, e.g. with direction finders - G01V: GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS (means for indicating the location of accidentally buried, e.g. snow-buried, persons A63B29/02) - G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES ## Abstract A multi-functional measuring instrument includes: a housing, and a control circuit board and a wall detection circuit mounted inside the housing. Specifically, a hidden slot is arranged at a bottom end portion of the housing, a humidity measuring device is mounted inside the hidden slot in a sliding mode, and a thermal imaging device is mounted on one side of the housing. According to the present disclosure, the multi-functional measuring instrument is an instrument integrating various functions of wall detection, thermal imaging, distance measurement, laser projection, humidity measurement and the like. The instrument has a compact structure, is easy to carry on, and is applicable to various aspects of building detection, auto repair detection, floor-heating detection, electrical detection and the like. ## Claims ### Claim 1 A multi-functional measuring device, comprising: a housing; and a control circuit board and a wall detection circuit mounted inside the housing; wherein a slot is arranged at a bottom end portion of the housing, a humidity measuring device is mounted inside the slot, and a thermal imaging device is mounted on one side of the housing, wherein the thermal imaging device is provided with a thermal imaging camera and a visible light camera, and the wall detection circuit, the humidity measuring device and the thermal imaging device are electrically connected to the control circuit board separately. ### Claim 2 (depends on 1) The multi-functional measuring device according to claim 1, wherein the housing comprises an upper housing, a middle frame, and a lower housing; wherein the middle frame is connected to the lower housing via a connection support, and the control circuit board is arranged between the middle frame and the lower housing. ### Claim 3 (depends on 2) The multi-functional measuring device according to claim 2, wherein a nut is secured to the lower housing. ### Claim 4 (depends on 2) The multi-functional measuring device according to claim 2, wherein a laser ranging device and a laser projection device are mounted at an inner top of the middle frame; wherein the laser ranging device and the laser projection device are electrically connected to the control circuit board, separately; the laser projection device adopts a cross-line laser head, a cross-shaped marking channel is correspondingly arranged on the housing, and the laser projection device is secured inside the middle frame via a securing base; and a transmit channel and a receive channel that allow passage of light from and to a light source of the laser ranging device are arranged on the housing. ### Claim 5 (depends on 4) The multi-functional measuring device according to claim 4, wherein an illumination device is further mounted on the laser ranging device; wherein the illumination device is eclectically connected to the control circuit board, a switch for turning on or off the illumination device is arranged on a side of the housing, and an illumination channel is corresponding arranged on the housing. ### Claim 6 (depends on 2) The multi-functional measuring device according to claim 2, wherein the humidity measuring device comprises a press switch, two telescopic copper needles, a slide block, and a spring; wherein the press switch takes the middle frame as a fulcrum to form a lever-supporting structure, an upper portion of the lever-supporting structure runs through the upper housing to form a press portion, a lower portion of the lever-supporting structure runs through the middle frame, a spring groove is arranged in the middle frame below the press portion, a lower end of the spring is arranged inside the spring groove, and an upper end of the spring is in contact with the press portion; and a clamp block is arranged at a lower portion of the press switch, clamping slots and the clamp block are arranged on upper and lower sides of the slide block, and end portions of the two telescopic copper needles are secured to the slide block. ### Claim 7 (depends on 2) The multi-functional measuring device according to claim 2, wherein a display screen mount is arranged at an upper portion of the middle frame; wherein a display screen is mounted in the display screen mount, an outer screen is mounted on an outer side of the display screen, and the display screen is electrically connected to the control circuit board. ### Claim 8 (depends on 7) The multi-functional measuring device according to claim 7, wherein a control button is arranged on the control circuit board, and a key portion is mounted on the middle frame. ### Claim 9 (depends on 1) The multi-functional measuring device according to claim 1, wherein an electroprobe is further mounted on the humidity measuring device; wherein the electroprobe is electrically connected to the control circuit board, the electroprobe is configured to be provided inside the housing, and the electroprobe is further electrically connected to an alarm light.